feat: release OTP and Passkey Tools 0.1.0

2026-08-19 12:19:35 +02:00
commit f1cb2d7151
67 changed files with 12802 additions and 0 deletions
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 node_modules/
 dist/
 release/*.zip
 release/*.zip.sha256
 coverage/
 playwright-report/
 test-results/
 *.tsbuildinfo
 .DS_Store
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@add-ideas:registry=https://git.add-ideas.de/api/packages/lotobo/npm/
 always-auth=false
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 # Changelog
 All notable changes are documented here.
 ## 0.1.0 - 2026-08-19
 - Initial HOTP, TOTP and OCRA credential laboratory with official RFC-vector coverage.
 - Added strict provisioning URI handling, local QR generation/image detection, Google migration, CSV, URI-list and plain-secret PSKC workflows.
 - Added bounded WebAuthn CBOR/client/authenticator/attestation inspection and layered assertion verification.
 - Added origin-gated, memory-only WebAuthn registration/authentication lab and browser capability diagnostics.
 - Added Toolbox SDK 0.2.3 integration, responsive light/dark/system UI, reproducible release packaging, source identity and security/licence documentation.
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    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 Also add information on how to contact you by electronic and paper mail.
  If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.
 The hypothetical commands `show w' and `show c' should show the appropriate
 parts of the General Public License.  Of course, your program's commands
 might be different; for a GUI interface, you would use an "about box".
  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
 <https://www.gnu.org/licenses/>.
  The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <https://www.gnu.org/licenses/why-not-lgpl.html>.
@@ -0,0 +1,21 @@
 MIT License
 Copyright (c) 2009 Kazuhiko Arase
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
@@ -0,0 +1,5 @@
 # Licence inventory
 OTP & Passkey Tools is `GPL-3.0-or-later`; the full project licence is at `../LICENSE`.
 `THIRD_PARTY_NOTICES.md` identifies shipped packages and adapted algorithms. Release preparation collates the exact installed runtime package licence files into `npm-runtime-licenses.txt`. `QRCode-MIT.txt` preserves the licence for the QR construction algorithm rewritten in this project.
@@ -0,0 +1,71 @@
 # OTP & Passkey Tools
 A production-oriented, local-first browser workbench for OTP credentials and WebAuthn/passkey evidence. It is part of the [add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal), but its release ZIP also runs as a standalone static application.
 Authentication material stays in the active tab. The application has no backend, telemetry, automatic network lookup, service worker, cookie, local-storage credential store, or IndexedDB database.
 ## Included in 0.1.0
 - RFC 4226 HOTP and RFC 6238 TOTP generation and bounded diagnostic verification using SHA-1, SHA-256 or SHA-512, with exact 64-bit counters and preserved leading zeroes.
 - Strict `otpauth://` parsing/serialization, random secret generation, masked values, interoperability findings, live period display and a project-owned QR encoder.
 - RFC 6287 OCRA-1 suite parsing and computation for counter, numeric/alphanumeric/hex challenge, PIN/password hash, session and timestamp inputs. Official RFC interoperability vectors cover SHA-1, SHA-256 and SHA-512 paths.
 - Import of line-delimited provisioning URIs, Google Authenticator migration QR payloads, the documented CSV shape and RFC 6030 PSKC files containing plain secrets. Encrypted PSKC is rejected rather than guessed.
 - Explicit URI-list and CSV export with an unencrypted-secret warning.
 - Bounded CBOR, `clientDataJSON`, authenticator-data and attestation-object inspection, including flags, RP ID hash, counter, AAGUID, credential ID, COSE key and extensions.
 - Layered assertion verification for challenge, origin, cross-origin state, RP ID hash, user presence/verification, signature counter, and ES256, RS256, PS256 or Ed25519 signatures.
 - Serializable registration/request option examples, browser capability diagnostics and an ephemeral in-memory live ceremony lab.
 ## Security boundary
 The Toolbox app at `/apps/auth/` is deliberately **inspect-only for live WebAuthn ceremonies**. Every app under `toolbox.add-ideas.de` shares one browser origin and therefore one WebAuthn relying-party namespace. Credential creation/authentication is enabled only on localhost or the dedicated origin:
 ```text
 https://auth.toolbox.add-ideas.de/
 ```
 The same immutable release can be served there, top-level, with RP ID `auth.toolbox.add-ideas.de`. The RP ID is never widened to `add-ideas.de`, and arbitrary RP IDs can only be inspected offline.
 Raw CTAP/token administration is not claimed: browsers expose ordinary WebAuthn but block the FIDO HID usage page from WebHID. Camera and USB permissions are not requested. QR images can be selected locally when the browser implements `BarcodeDetector`; provisioning text can always be pasted.
 See [SECURITY.md](SECURITY.md) for the threat model and limitations.
 ## Develop and verify
 Requirements: Node.js 22+, npm 11, and `zip` for deterministic release packaging.
 ```sh
 npm ci
 npm run check
 npm run test:browser
 npm run package:release
 ```
 The Vite base is relative, so both `/` and nested paths work. `npm run toolbox:check` validates the built manifest and its assets.
 ## Static deployment
 Serve `dist/` or the contents of `release/auth-tools-0.1.0.zip` over HTTPS. Recommended response headers:
 ```text
 Content-Security-Policy: default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; connect-src 'self'; worker-src 'self' blob:; manifest-src 'self'
 Permissions-Policy: camera=(), microphone=(), geolocation=(), usb=()
 Referrer-Policy: no-referrer
 X-Content-Type-Options: nosniff
 Cross-Origin-Opener-Policy: same-origin
 Cross-Origin-Resource-Policy: same-origin
 ```
 For Portal integration, pin the immutable Gitea release ZIP and SHA-256 in `toolbox-portal/release/toolbox.lock.json` with target `auth`.
 ## Deliberate limits
 - This is an engineering and interoperability workbench, not a certified authenticator, relying-party server, password manager, FIDO certification tool or recovery system.
 - Live credentials are forgotten on reload and cannot be exported by WebAuthn design.
 - Attestation structures are decoded, but 0.1.0 does not establish attestation trust or silently download FIDO Metadata Service data. Assertion signatures are verified only with the explicitly supplied/created credential key.
 - Google multi-QR batches must all be supplied; the current UI reviews one payload at a time. Google migration export and encrypted PSKC decryption are not claimed.
 - CSV and URI exports contain raw OTP seeds. There is no encrypted vault format in this app.
 - QR generation supports byte-mode error-correction M through version 10. Larger provisioning records remain available as text exports.
 ## Licence
 `GPL-3.0-or-later`. See [LICENSE](LICENSE), [SOURCE.md](SOURCE.md), and [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md).
@@ -0,0 +1,40 @@
 # Security model
 ## Data flow
 All inputs are processed in the browser tab. There are no application `fetch`, WebSocket, beacon, analytics, service-worker, credential-storage or remote-metadata paths. OTP secrets, OCRA PIN input, imported files, WebAuthn responses and live test credential metadata are React/session memory and disappear on reload or **Clear session**.
 Downloads and clipboard writes require a user action. Exports are not encrypted. The UI masks OTP secrets and provisioning URIs by default, but masking is not memory protection.
 ## Trust boundaries
 - The static release and its hosting origin are trusted code. A compromised host can alter JavaScript and steal subsequently entered material; verify the release SHA-256 when this matters.
 - Imported URIs, CSV, XML, protobuf, JSON, Base64url and CBOR are untrusted. Size/depth/count limits are applied before or during decoding. Imported text is rendered by React, never as markup. The only generated markup insertion is the project-owned QR SVG serializer, which receives an already serialized provisioning URI and emits path coordinates only.
 - WebAuthn client data is verified as exact strings/bytes. Origins and RP IDs are not suffix-matched. The expected challenge is caller-supplied ceremony state; the tool cannot prove that a server generated or consumed it once.
 - Signature verification establishes consistency with the supplied COSE public key, not account ownership or attestation trust.
 ## Origin isolation
 `toolbox.add-ideas.de/apps/auth/` shares an origin with every other Portal app. Live registration/assertion is therefore disabled there. It is enabled only for localhost development or exact host `auth.toolbox.add-ideas.de`. Deploy the dedicated host top-level with `frame-ancestors 'none'`; do not change its RP ID to the parent domain.
 ## Cryptography
 HMAC, digest, random generation, public-key import and signature verification use the browser Web Cryptography API. No custom cryptographic primitive is implemented. OTP dynamic truncation and OCRA data-input assembly are project code covered by RFC vectors.
 SHA-1 remains available only where HOTP/TOTP/OCRA interoperability standards require it; it is used inside HMAC or as an explicitly selected OCRA PIN digest, not as a collision-resistant document signature.
 ## Parser limits
 - Provisioning URI: 16 KiB.
 - Migration/CSV/PSKC input: 4 MiB.
 - Google protobuf: bounded input, varints at most 10 bytes, supported wire types only.
 - CBOR: 4 MiB, depth 32, 10,000 items, definite lengths only, duplicate map keys rejected.
 - OTP secret: 1 KiB; random generation: 16–1,024 bytes.
 - Verification windows: TOTP 100 steps maximum; HOTP 10,000 counters maximum.
 - QR encoder: version 10 maximum.
 ## Not a vault or identity provider
 Do not use this app as the only copy of a credential. It does not offer encrypted persistence, recovery codes, account recovery, server-side challenge state, rate limiting, audit logging, device attestation policy, FIDO certification, or phishing protection outside normal browser WebAuthn behavior.
 Report vulnerabilities through the repository issue tracker without including real secrets or production assertions.
@@ -0,0 +1,31 @@
 # Corresponding source and provenance
 The corresponding source for OTP & Passkey Tools 0.1.0 will be published at:
 https://git.add-ideas.de/lotobo/auth-tools/src/tag/v0.1.0
 Build that tag with Node.js 22 and the exact `package-lock.json`:
 ```sh
 npm ci
 npm run release:artifact
 ```
 No generated bundle is the preferred source form. No runtime code, metadata or cryptographic service is loaded from a CDN.
 ## Standards and revisions used
 | Source                                       | Revision                                                   | Use                                                               |
 | -------------------------------------------- | ---------------------------------------------------------- | ----------------------------------------------------------------- |
 | Toolbox SDK                                  | `ef2dab4b46c61812c9a877d8a19fe497b4a4630a`, packages 0.2.3 | manifest, context, shell and build checks                         |
 | Toolbox Portal                               | `5ed7134d42f0b563bc47a1572107ea94994dfe3c`, tag v0.10.0    | release and UX integration contract                               |
 | RFC 4226                                     | December 2005                                              | HOTP semantics and vectors                                        |
 | RFC 6238                                     | May 2011                                                   | TOTP semantics and vectors                                        |
 | RFC 6287                                     | June 2011                                                  | OCRA suite grammar, semantics and vectors                         |
 | RFC 6030                                     | October 2010                                               | bounded plain-secret PSKC import                                  |
 | Google Authenticator migration protobuf      | observed public interchange schema                         | local import only; unknown fields are skipped safely              |
 | Web Authentication                           | W3C WebAuthn Level 3 Recommendation, 13 January 2026       | client/authenticator structures and ceremony expectations         |
 | RFC 8949 / RFC 9052 / RFC 8152 registrations | published versions                                         | bounded CBOR and COSE key interpretation                          |
 | QR Code for JavaScript                       | Kazuhiko Arase, 2009                                       | QR construction algorithm rewritten in TypeScript under MIT terms |
 The OCRA implementation was authored from the normative RFC definition and tested with its published interoperability values; the RFC Java reference implementation is not included. The QR module is an acknowledged clean TypeScript rewrite of the MIT-licensed construction algorithm, with deliberately bounded version support.
@@ -0,0 +1,24 @@
 # Third-party notices
 The release preparation step collates licence files for the exact locked runtime packages into `LICENSES/npm-runtime-licenses.txt` inside the static artifact.
 ## Direct runtime packages
 | Package                          | Version | Licence    | Role                            | Source                                      |
 | -------------------------------- | ------- | ---------- | ------------------------------- | ------------------------------------------- |
 | `@add-ideas/toolbox-contract`    | 0.2.3   | Apache-2.0 | manifest and context contract   | https://git.add-ideas.de/lotobo/toolbox-sdk |
 | `@add-ideas/toolbox-shell-react` | 0.2.3   | Apache-2.0 | shared shell, theme and actions | https://git.add-ideas.de/lotobo/toolbox-sdk |
 | `react`                          | 19.2.6  | MIT        | application UI                  | https://github.com/facebook/react           |
 | `react-dom`                      | 19.2.6  | MIT        | browser rendering               | https://github.com/facebook/react           |
 `scheduler`, distributed by the React project under MIT, is the only transitive runtime package.
 ## QR construction
 `src/qr/encoder.ts` is a bounded TypeScript rewrite following the QRCode for JavaScript construction algorithm by Kazuhiko Arase (copyright 2009), used under the MIT License. The licence text is in `LICENSES/QRCode-MIT.txt`. The rewrite supports byte mode, error correction M, versions 1–10, and contains no upstream branding or UI.
 ## Standards material
 RFC interoperability values are facts used as tests. The OCRA implementation is project-authored from RFC 6287; its Java reference implementation is not shipped. W3C WebAuthn, IETF CBOR/COSE and OTP specifications are implementation references, not bundled runtime software.
 Development-only packages listed in `package-lock.json` build and test the source but are not shipped as runtime modules.
@@ -0,0 +1,40 @@
 import js from "@eslint/js";
 import globals from "globals";
 import reactHooks from "eslint-plugin-react-hooks";
 import reactRefresh from "eslint-plugin-react-refresh";
 import tseslint from "typescript-eslint";
 export default tseslint.config(
  {
    ignores: [
      "dist",
      "release",
      "coverage",
      "test-results",
      "playwright-report",
    ],
  },
  {
    extends: [js.configs.recommended, ...tseslint.configs.recommended],
    files: ["**/*.{ts,tsx}"],
    languageOptions: {
      ecmaVersion: 2023,
      globals: { ...globals.browser, ...globals.worker },
    },
    plugins: {
      "react-hooks": reactHooks,
      "react-refresh": reactRefresh,
    },
    rules: {
      ...reactHooks.configs.recommended.rules,
      "react-refresh/only-export-components": [
        "warn",
        { allowConstantExport: true },
      ],
    },
  },
  {
    files: ["scripts/**/*.mjs", "playwright.config.ts"],
    languageOptions: { globals: globals.node },
  },
 );
@@ -0,0 +1,17 @@
 <!doctype html>
 <html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta
      name="description"
      content="Inspect and test OTP and WebAuthn authentication locally in your browser."
    />
    <link rel="icon" type="image/svg+xml" href="./favicon.svg" />
    <title>OTP &amp; Passkey Tools</title>
  </head>
  <body>
    <div id="root"></div>
    <script type="module" src="./src/main.tsx"></script>
  </body>
 </html>
@@ -0,0 +1,71 @@
 {
  "name": "auth-tools",
  "version": "0.1.0",
  "description": "Inspect and test OTP and WebAuthn authentication locally in the browser.",
  "license": "GPL-3.0-or-later",
  "author": "Albrecht Degering",
  "repository": {
    "type": "git",
    "url": "git+https://git.add-ideas.de/lotobo/auth-tools.git"
  },
  "homepage": "https://git.add-ideas.de/lotobo/auth-tools",
  "bugs": {
    "url": "https://git.add-ideas.de/lotobo/auth-tools/issues"
  },
  "private": true,
  "type": "module",
  "engines": {
    "node": ">=22"
  },
  "scripts": {
    "predev": "npm run manifest:generate",
    "dev": "vite",
    "prebuild": "npm run release:prepare && npm run manifest:generate",
    "build": "tsc -b && vite build",
    "preview": "vite preview",
    "typecheck": "tsc -b --pretty false",
    "lint": "eslint . --max-warnings=0",
    "format": "prettier --write .",
    "format:check": "prettier --check .",
    "test": "vitest run",
    "test:watch": "vitest",
    "test:browser": "playwright test",
    "manifest:generate": "node scripts/generate-toolbox-manifest.mjs",
    "manifest:check": "node scripts/generate-toolbox-manifest.mjs --check",
    "release:prepare": "node scripts/prepare-release-files.mjs",
    "toolbox:check": "toolbox-check dist",
    "package:release": "node scripts/package-release.mjs",
    "check": "npm run manifest:check && npm run typecheck && npm run lint && npm run format:check && npm run test && npm run build && npm run toolbox:check",
    "release:artifact": "npm run check && npm run test:browser && npm run package:release -- --force"
  },
  "dependencies": {
    "@add-ideas/toolbox-contract": "0.2.3",
    "@add-ideas/toolbox-shell-react": "0.2.3",
    "react": "19.2.6",
    "react-dom": "19.2.6"
  },
  "devDependencies": {
    "@add-ideas/toolbox-testkit": "0.2.3",
    "@eslint/js": "10.0.1",
    "@playwright/test": "1.61.1",
    "@testing-library/jest-dom": "6.9.1",
    "@testing-library/react": "16.3.2",
    "@testing-library/user-event": "14.6.1",
    "@types/node": "25.8.0",
    "@types/react": "19.2.14",
    "@types/react-dom": "19.2.3",
    "@vitejs/plugin-react": "6.0.2",
    "eslint": "10.4.0",
    "eslint-plugin-react-hooks": "7.1.1",
    "eslint-plugin-react-refresh": "0.5.2",
    "fast-check": "4.9.0",
    "globals": "17.6.0",
    "jsdom": "29.1.1",
    "prettier": "3.8.3",
    "typescript": "6.0.3",
    "typescript-eslint": "8.59.3",
    "vite": "8.2.0",
    "vitest": "4.1.6"
  },
  "packageManager": "npm@11.17.0"
 }
@@ -0,0 +1,24 @@
 import { defineConfig, devices } from "@playwright/test";
 export default defineConfig({
  testDir: "./tests/browser",
  fullyParallel: false,
  workers: 2,
  timeout: 120_000,
  expect: { timeout: 10_000 },
  reporter: [["list"]],
  use: {
    baseURL: "http://127.0.0.1:4173",
    trace: "retain-on-failure",
  },
  webServer: {
    command: "npm run build && node scripts/serve-test.mjs",
    url: "http://127.0.0.1:4173",
    reuseExistingServer: !process.env.CI,
    timeout: 180_000,
  },
  projects: [
    { name: "chromium", use: { ...devices["Desktop Chrome"] } },
    { name: "firefox", use: { ...devices["Desktop Firefox"] } },
  ],
 });
@@ -0,0 +1,11 @@
 # Changelog
 All notable changes are documented here.
 ## 0.1.0 - 2026-08-19
 - Initial HOTP, TOTP and OCRA credential laboratory with official RFC-vector coverage.
 - Added strict provisioning URI handling, local QR generation/image detection, Google migration, CSV, URI-list and plain-secret PSKC workflows.
 - Added bounded WebAuthn CBOR/client/authenticator/attestation inspection and layered assertion verification.
 - Added origin-gated, memory-only WebAuthn registration/authentication lab and browser capability diagnostics.
 - Added Toolbox SDK 0.2.3 integration, responsive light/dark/system UI, reproducible release packaging, source identity and security/licence documentation.
@@ -0,0 +1,674 @@
                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007
 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
                            Preamble
  The GNU General Public License is a free, copyleft license for
 software and other kinds of works.
  The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works.  By contrast,
 the GNU General Public License is intended to guarantee your freedom to
 share and change all versions of a program--to make sure it remains free
 software for all its users.  We, the Free Software Foundation, use the
 GNU General Public License for most of our software; it applies also to
 any other work released this way by its authors.  You can apply it to
 your programs, too.
  When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
 have the freedom to distribute copies of free software (and charge for
 them if you wish), that you receive source code or can get it if you
 want it, that you can change the software or use pieces of it in new
 free programs, and that you know you can do these things.
  To protect your rights, we need to prevent others from denying you
 these rights or asking you to surrender the rights.  Therefore, you have
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 you modify it: responsibilities to respect the freedom of others.
  For example, if you distribute copies of such a program, whether
 gratis or for a fee, you must pass on to the recipients the same
 freedoms that you received.  You must make sure that they, too, receive
 or can get the source code.  And you must show them these terms so they
 know their rights.
  Developers that use the GNU GPL protect your rights with two steps:
 (1) assert copyright on the software, and (2) offer you this License
 giving you legal permission to copy, distribute and/or modify it.
  For the developers' and authors' protection, the GPL clearly explains
 that there is no warranty for this free software.  For both users' and
 authors' sake, the GPL requires that modified versions be marked as
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  Some devices are designed to deny users access to install or run
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 can do so.  This is fundamentally incompatible with the aim of
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 have designed this version of the GPL to prohibit the practice for those
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 stand ready to extend this provision to those domains in future versions
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  Finally, every program is threatened constantly by software patents.
 States should not allow patents to restrict development and use of
 software on general-purpose computers, but in those that do, we wish to
 avoid the special danger that patents applied to a free program could
 make it effectively proprietary.  To prevent this, the GPL assures that
 patents cannot be used to render the program non-free.
  The precise terms and conditions for copying, distribution and
 modification follow.
                       TERMS AND CONDITIONS
  0. Definitions.
  "This License" refers to version 3 of the GNU General Public License.
  "Copyright" also means copyright-like laws that apply to other kinds of
 works, such as semiconductor masks.
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 License.  Each licensee is addressed as "you".  "Licensees" and
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  To "convey" a work means any kind of propagation that enables other
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 Also add information on how to contact you by electronic and paper mail.
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 The hypothetical commands `show w' and `show c' should show the appropriate
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 might be different; for a GUI interface, you would use an "about box".
  You should also get your employer (if you work as a programmer) or school,
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  The GNU General Public License does not permit incorporating your program
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 Public License instead of this License.  But first, please read
 <https://www.gnu.org/licenses/why-not-lgpl.html>.
@@ -0,0 +1,21 @@
 MIT License
 Copyright (c) 2009 Kazuhiko Arase
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
@@ -0,0 +1,5 @@
 # Licence inventory
 OTP & Passkey Tools is `GPL-3.0-or-later`; the full project licence is at `../LICENSE`.
 `THIRD_PARTY_NOTICES.md` identifies shipped packages and adapted algorithms. Release preparation collates the exact installed runtime package licence files into `npm-runtime-licenses.txt`. `QRCode-MIT.txt` preserves the licence for the QR construction algorithm rewritten in this project.
@@ -0,0 +1,486 @@
 ==============================================================================
@add-ideas/toolbox-contract@0.2.3
 Declared licence: Apache-2.0
 Installed from: node_modules/@add-ideas/toolbox-contract
 ==============================================================================
 --- LICENSE ---
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      Copyright 2026 ADD Ideas
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 SOFTWARE.
@@ -0,0 +1,71 @@
 # OTP & Passkey Tools
 A production-oriented, local-first browser workbench for OTP credentials and WebAuthn/passkey evidence. It is part of the [add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal), but its release ZIP also runs as a standalone static application.
 Authentication material stays in the active tab. The application has no backend, telemetry, automatic network lookup, service worker, cookie, local-storage credential store, or IndexedDB database.
 ## Included in 0.1.0
 - RFC 4226 HOTP and RFC 6238 TOTP generation and bounded diagnostic verification using SHA-1, SHA-256 or SHA-512, with exact 64-bit counters and preserved leading zeroes.
 - Strict `otpauth://` parsing/serialization, random secret generation, masked values, interoperability findings, live period display and a project-owned QR encoder.
 - RFC 6287 OCRA-1 suite parsing and computation for counter, numeric/alphanumeric/hex challenge, PIN/password hash, session and timestamp inputs. Official RFC interoperability vectors cover SHA-1, SHA-256 and SHA-512 paths.
 - Import of line-delimited provisioning URIs, Google Authenticator migration QR payloads, the documented CSV shape and RFC 6030 PSKC files containing plain secrets. Encrypted PSKC is rejected rather than guessed.
 - Explicit URI-list and CSV export with an unencrypted-secret warning.
 - Bounded CBOR, `clientDataJSON`, authenticator-data and attestation-object inspection, including flags, RP ID hash, counter, AAGUID, credential ID, COSE key and extensions.
 - Layered assertion verification for challenge, origin, cross-origin state, RP ID hash, user presence/verification, signature counter, and ES256, RS256, PS256 or Ed25519 signatures.
 - Serializable registration/request option examples, browser capability diagnostics and an ephemeral in-memory live ceremony lab.
 ## Security boundary
 The Toolbox app at `/apps/auth/` is deliberately **inspect-only for live WebAuthn ceremonies**. Every app under `toolbox.add-ideas.de` shares one browser origin and therefore one WebAuthn relying-party namespace. Credential creation/authentication is enabled only on localhost or the dedicated origin:
 ```text
 https://auth.toolbox.add-ideas.de/
 ```
 The same immutable release can be served there, top-level, with RP ID `auth.toolbox.add-ideas.de`. The RP ID is never widened to `add-ideas.de`, and arbitrary RP IDs can only be inspected offline.
 Raw CTAP/token administration is not claimed: browsers expose ordinary WebAuthn but block the FIDO HID usage page from WebHID. Camera and USB permissions are not requested. QR images can be selected locally when the browser implements `BarcodeDetector`; provisioning text can always be pasted.
 See [SECURITY.md](SECURITY.md) for the threat model and limitations.
 ## Develop and verify
 Requirements: Node.js 22+, npm 11, and `zip` for deterministic release packaging.
 ```sh
 npm ci
 npm run check
 npm run test:browser
 npm run package:release
 ```
 The Vite base is relative, so both `/` and nested paths work. `npm run toolbox:check` validates the built manifest and its assets.
 ## Static deployment
 Serve `dist/` or the contents of `release/auth-tools-0.1.0.zip` over HTTPS. Recommended response headers:
 ```text
 Content-Security-Policy: default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; connect-src 'self'; worker-src 'self' blob:; manifest-src 'self'
 Permissions-Policy: camera=(), microphone=(), geolocation=(), usb=()
 Referrer-Policy: no-referrer
 X-Content-Type-Options: nosniff
 Cross-Origin-Opener-Policy: same-origin
 Cross-Origin-Resource-Policy: same-origin
 ```
 For Portal integration, pin the immutable Gitea release ZIP and SHA-256 in `toolbox-portal/release/toolbox.lock.json` with target `auth`.
 ## Deliberate limits
 - This is an engineering and interoperability workbench, not a certified authenticator, relying-party server, password manager, FIDO certification tool or recovery system.
 - Live credentials are forgotten on reload and cannot be exported by WebAuthn design.
 - Attestation structures are decoded, but 0.1.0 does not establish attestation trust or silently download FIDO Metadata Service data. Assertion signatures are verified only with the explicitly supplied/created credential key.
 - Google multi-QR batches must all be supplied; the current UI reviews one payload at a time. Google migration export and encrypted PSKC decryption are not claimed.
 - CSV and URI exports contain raw OTP seeds. There is no encrypted vault format in this app.
 - QR generation supports byte-mode error-correction M through version 10. Larger provisioning records remain available as text exports.
 ## Licence
 `GPL-3.0-or-later`. See [LICENSE](LICENSE), [SOURCE.md](SOURCE.md), and [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md).
@@ -0,0 +1,40 @@
 # Security model
 ## Data flow
 All inputs are processed in the browser tab. There are no application `fetch`, WebSocket, beacon, analytics, service-worker, credential-storage or remote-metadata paths. OTP secrets, OCRA PIN input, imported files, WebAuthn responses and live test credential metadata are React/session memory and disappear on reload or **Clear session**.
 Downloads and clipboard writes require a user action. Exports are not encrypted. The UI masks OTP secrets and provisioning URIs by default, but masking is not memory protection.
 ## Trust boundaries
 - The static release and its hosting origin are trusted code. A compromised host can alter JavaScript and steal subsequently entered material; verify the release SHA-256 when this matters.
 - Imported URIs, CSV, XML, protobuf, JSON, Base64url and CBOR are untrusted. Size/depth/count limits are applied before or during decoding. Imported text is rendered by React, never as markup. The only generated markup insertion is the project-owned QR SVG serializer, which receives an already serialized provisioning URI and emits path coordinates only.
 - WebAuthn client data is verified as exact strings/bytes. Origins and RP IDs are not suffix-matched. The expected challenge is caller-supplied ceremony state; the tool cannot prove that a server generated or consumed it once.
 - Signature verification establishes consistency with the supplied COSE public key, not account ownership or attestation trust.
 ## Origin isolation
 `toolbox.add-ideas.de/apps/auth/` shares an origin with every other Portal app. Live registration/assertion is therefore disabled there. It is enabled only for localhost development or exact host `auth.toolbox.add-ideas.de`. Deploy the dedicated host top-level with `frame-ancestors 'none'`; do not change its RP ID to the parent domain.
 ## Cryptography
 HMAC, digest, random generation, public-key import and signature verification use the browser Web Cryptography API. No custom cryptographic primitive is implemented. OTP dynamic truncation and OCRA data-input assembly are project code covered by RFC vectors.
 SHA-1 remains available only where HOTP/TOTP/OCRA interoperability standards require it; it is used inside HMAC or as an explicitly selected OCRA PIN digest, not as a collision-resistant document signature.
 ## Parser limits
 - Provisioning URI: 16 KiB.
 - Migration/CSV/PSKC input: 4 MiB.
 - Google protobuf: bounded input, varints at most 10 bytes, supported wire types only.
 - CBOR: 4 MiB, depth 32, 10,000 items, definite lengths only, duplicate map keys rejected.
 - OTP secret: 1 KiB; random generation: 16–1,024 bytes.
 - Verification windows: TOTP 100 steps maximum; HOTP 10,000 counters maximum.
 - QR encoder: version 10 maximum.
 ## Not a vault or identity provider
 Do not use this app as the only copy of a credential. It does not offer encrypted persistence, recovery codes, account recovery, server-side challenge state, rate limiting, audit logging, device attestation policy, FIDO certification, or phishing protection outside normal browser WebAuthn behavior.
 Report vulnerabilities through the repository issue tracker without including real secrets or production assertions.
@@ -0,0 +1,31 @@
 # Corresponding source and provenance
 The corresponding source for OTP & Passkey Tools 0.1.0 will be published at:
 https://git.add-ideas.de/lotobo/auth-tools/src/tag/v0.1.0
 Build that tag with Node.js 22 and the exact `package-lock.json`:
 ```sh
 npm ci
 npm run release:artifact
 ```
 No generated bundle is the preferred source form. No runtime code, metadata or cryptographic service is loaded from a CDN.
 ## Standards and revisions used
 | Source                                       | Revision                                                   | Use                                                               |
 | -------------------------------------------- | ---------------------------------------------------------- | ----------------------------------------------------------------- |
 | Toolbox SDK                                  | `ef2dab4b46c61812c9a877d8a19fe497b4a4630a`, packages 0.2.3 | manifest, context, shell and build checks                         |
 | Toolbox Portal                               | `5ed7134d42f0b563bc47a1572107ea94994dfe3c`, tag v0.10.0    | release and UX integration contract                               |
 | RFC 4226                                     | December 2005                                              | HOTP semantics and vectors                                        |
 | RFC 6238                                     | May 2011                                                   | TOTP semantics and vectors                                        |
 | RFC 6287                                     | June 2011                                                  | OCRA suite grammar, semantics and vectors                         |
 | RFC 6030                                     | October 2010                                               | bounded plain-secret PSKC import                                  |
 | Google Authenticator migration protobuf      | observed public interchange schema                         | local import only; unknown fields are skipped safely              |
 | Web Authentication                           | W3C WebAuthn Level 3 Recommendation, 13 January 2026       | client/authenticator structures and ceremony expectations         |
 | RFC 8949 / RFC 9052 / RFC 8152 registrations | published versions                                         | bounded CBOR and COSE key interpretation                          |
 | QR Code for JavaScript                       | Kazuhiko Arase, 2009                                       | QR construction algorithm rewritten in TypeScript under MIT terms |
 The OCRA implementation was authored from the normative RFC definition and tested with its published interoperability values; the RFC Java reference implementation is not included. The QR module is an acknowledged clean TypeScript rewrite of the MIT-licensed construction algorithm, with deliberately bounded version support.
@@ -0,0 +1,24 @@
 # Third-party notices
 The release preparation step collates licence files for the exact locked runtime packages into `LICENSES/npm-runtime-licenses.txt` inside the static artifact.
 ## Direct runtime packages
 | Package                          | Version | Licence    | Role                            | Source                                      |
 | -------------------------------- | ------- | ---------- | ------------------------------- | ------------------------------------------- |
 | `@add-ideas/toolbox-contract`    | 0.2.3   | Apache-2.0 | manifest and context contract   | https://git.add-ideas.de/lotobo/toolbox-sdk |
 | `@add-ideas/toolbox-shell-react` | 0.2.3   | Apache-2.0 | shared shell, theme and actions | https://git.add-ideas.de/lotobo/toolbox-sdk |
 | `react`                          | 19.2.6  | MIT        | application UI                  | https://github.com/facebook/react           |
 | `react-dom`                      | 19.2.6  | MIT        | browser rendering               | https://github.com/facebook/react           |
 `scheduler`, distributed by the React project under MIT, is the only transitive runtime package.
 ## QR construction
 `src/qr/encoder.ts` is a bounded TypeScript rewrite following the QRCode for JavaScript construction algorithm by Kazuhiko Arase (copyright 2009), used under the MIT License. The licence text is in `LICENSES/QRCode-MIT.txt`. The rewrite supports byte mode, error correction M, versions 1–10, and contains no upstream branding or UI.
 ## Standards material
 RFC interoperability values are facts used as tests. The OCRA implementation is project-authored from RFC 6287; its Java reference implementation is not shipped. W3C WebAuthn, IETF CBOR/COSE and OTP specifications are implementation references, not bundled runtime software.
 Development-only packages listed in `package-lock.json` build and test the source but are not shipped as runtime modules.
@@ -0,0 +1,8 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" role="img" aria-labelledby="title">
  <title id="title">OTP and passkey tools</title>
  <path fill="#f4f0e8" stroke="#272421" stroke-width="3" d="M12 3h29l11 11v47H12z"/>
  <path fill="#ded7c9" stroke="#272421" stroke-width="3" d="M41 3v12h11"/>
  <circle cx="28" cy="32" r="9" fill="#e65f3c" stroke="#272421" stroke-width="3"/>
  <path fill="none" stroke="#272421" stroke-linecap="round" stroke-width="4" d="M35 39l12 12m-5-5 4-4m-8 1 4-4"/>
  <circle cx="28" cy="32" r="2.5" fill="#f4f0e8"/>
 </svg>
@@ -0,0 +1,52 @@
 {
  "$schema": "https://git.add-ideas.de/lotobo/toolbox-sdk/raw/branch/main/schemas/toolbox-app.v1.schema.json",
  "schemaVersion": 1,
  "id": "de.add-ideas.auth-tools",
  "name": "OTP & Passkey Tools",
  "version": "0.1.0",
  "description": "Generate, inspect and verify OTP credentials and test WebAuthn/passkey ceremonies locally in the browser.",
  "entry": "./",
  "icon": "./favicon.svg",
  "categories": ["security", "authentication", "developer"],
  "tags": [
    "otp",
    "hotp",
    "totp",
    "ocra",
    "oath",
    "webauthn",
    "fido2",
    "passkey",
    "attestation",
    "assertion"
  ],
  "integration": {
    "contextVersion": 1,
    "launchModes": ["navigate", "new-tab"],
    "embedding": "unsupported"
  },
  "requirements": {
    "secureContext": true,
    "workers": false,
    "indexedDb": false,
    "crossOriginIsolated": false,
    "topLevelContext": true
  },
  "privacy": {
    "processing": "local",
    "fileUploads": false,
    "telemetry": false,
    "label": "Authentication material stays in this tab; nothing is uploaded or saved unless you explicitly export it."
  },
  "source": {
    "repository": "https://git.add-ideas.de/lotobo/auth-tools",
    "license": "GPL-3.0-or-later"
  },
  "actions": [
    {
      "id": "source",
      "label": "Source",
      "url": "https://git.add-ideas.de/lotobo/auth-tools"
    }
  ]
 }
@@ -0,0 +1,55 @@
 import { lstat, readFile, writeFile } from "node:fs/promises";
 import { dirname, join, relative } from "node:path";
 import { fileURLToPath } from "node:url";
 import { format } from "prettier";
 const root = join(dirname(fileURLToPath(import.meta.url)), "..");
 const sourcePath = join(root, "src", "toolbox", "manifest.source.json");
 const outputPath = join(root, "public", "toolbox-app.json");
 const source = JSON.parse(await readFile(sourcePath, "utf8"));
 const packageJson = JSON.parse(
  await readFile(join(root, "package.json"), "utf8"),
 );
 const versionSource = await readFile(join(root, "src", "version.ts"), "utf8");
 const applicationVersion =
  /^export const APPLICATION_VERSION = "([^"]+)";$/mu.exec(versionSource)?.[1];
 if (
  source.version !== packageJson.version ||
  applicationVersion !== packageJson.version
 )
  throw new Error(
    `Version drift: manifest ${source.version}, application ${String(applicationVersion)}, package ${packageJson.version}`,
  );
 if (
  source.id !== "de.add-ideas.auth-tools" ||
  source.source?.repository !== "https://git.add-ideas.de/lotobo/auth-tools" ||
  source.source?.license !== "GPL-3.0-or-later"
 )
  throw new Error("Manifest source identity is incomplete or inconsistent");
 for (const asset of source.assets ?? []) {
  if (
    typeof asset !== "string" ||
    !asset.startsWith("./") ||
    asset.includes("\\") ||
    asset.split("/").includes("..")
  )
    throw new Error(`Unsafe manifest asset path: ${JSON.stringify(asset)}`);
  const details = await lstat(join(root, "public", asset.slice(2))).catch(
    () => null,
  );
  if (!details?.isFile() || details.isSymbolicLink())
    throw new Error(`Manifest asset is missing or unsafe: ${asset}`);
 }
 const serialized = await format(JSON.stringify(source), {
  filepath: outputPath,
 });
 if (process.argv.includes("--check")) {
  if ((await readFile(outputPath, "utf8").catch(() => "")) !== serialized)
    throw new Error(
      `${relative(root, outputPath)} is stale; run npm run manifest:generate`,
    );
  console.log("Toolbox manifest is synchronized");
 } else {
  await writeFile(outputPath, serialized);
  console.log(`Generated ${relative(root, outputPath)}`);
 }
@@ -0,0 +1,148 @@
 #!/usr/bin/env node
 import { createHash } from "node:crypto";
 import { execFile } from "node:child_process";
 import {
  access,
  cp,
  lstat,
  mkdir,
  mkdtemp,
  readFile,
  readdir,
  rename,
  rm,
  utimes,
  writeFile,
 } from "node:fs/promises";
 import path from "node:path";
 import { promisify } from "node:util";
 import { fileURLToPath } from "node:url";
 const execute = promisify(execFile);
 const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
 const packageJson = JSON.parse(
  await readFile(path.join(root, "package.json"), "utf8"),
 );
 const argument = (name, fallback) => {
  const index = process.argv.indexOf(name);
  return index >= 0 ? process.argv[index + 1] : fallback;
 };
 const output = path.resolve(
  root,
  argument("--output", `release/auth-tools-${packageJson.version}.zip`),
 );
 const checksumOutput = `${output}.sha256`;
 const force = process.argv.includes("--force");
 if (
  path.extname(output).toLowerCase() !== ".zip" ||
  output === root ||
  output === path.parse(output).root
 )
  throw new Error("Release output is not a safe ZIP target");
 const exists = (file) =>
  access(file).then(
    () => true,
    () => false,
  );
 if (!force && ((await exists(output)) || (await exists(checksumOutput))))
  throw new Error("Release output already exists; use --force to replace it");
 const input = path.join(root, "dist");
 for (const name of [
  "index.html",
  "toolbox-app.json",
  "favicon.svg",
  "README.md",
  "CHANGELOG.md",
  "LICENSE",
  "SOURCE.md",
  "SECURITY.md",
  "THIRD_PARTY_NOTICES.md",
  "LICENSES/README.md",
  "LICENSES/npm-runtime-licenses.txt",
 ]) {
  const details = await lstat(path.join(input, name)).catch(() => null);
  if (!details?.isFile() || details.isSymbolicLink())
    throw new Error(`Release is missing a regular file: ${name}`);
 }
 const manifest = JSON.parse(
  await readFile(path.join(input, "toolbox-app.json"), "utf8"),
 );
 if (
  manifest.id !== "de.add-ideas.auth-tools" ||
  manifest.version !== packageJson.version ||
  manifest.entry !== "./" ||
  manifest.icon !== "./favicon.svg"
 )
  throw new Error("Packaged Toolbox manifest identity is invalid");
 const html = await readFile(path.join(input, "index.html"), "utf8");
 if (/\b(?:src|href)=["']\//iu.test(html))
  throw new Error("index.html contains a root-absolute asset reference");
 async function collect(directory, prefix = "") {
  const files = [];
  for (const entry of (await readdir(directory, { withFileTypes: true })).sort(
    (left, right) => left.name.localeCompare(right.name),
  )) {
    const absolute = path.join(directory, entry.name);
    const relative = prefix ? `${prefix}/${entry.name}` : entry.name;
    if (entry.isSymbolicLink())
      throw new Error(`Release contains a symbolic link: ${relative}`);
    if (entry.isDirectory()) files.push(...(await collect(absolute, relative)));
    else if (entry.isFile()) files.push({ absolute, relative });
    else throw new Error(`Unsupported release entry: ${relative}`);
  }
  return files;
 }
 const sourceFiles = await collect(input);
 for (const file of sourceFiles)
  if (
    file.relative.endsWith(".map") ||
    /(?:^|\/)(?:\.env(?:\.|$)|id_rsa|id_ed25519|.*\.pem$|.*\.key$)/iu.test(
      file.relative,
    ) ||
    file.relative.startsWith("/") ||
    file.relative.split("/").includes("..")
  )
    throw new Error(`Forbidden release entry: ${file.relative}`);
 await mkdir(path.dirname(output), { recursive: true });
 const stagingRoot = await mkdtemp(
  path.join(path.dirname(output), ".auth-release-"),
 );
 const stagedTree = path.join(stagingRoot, "tree");
 const stagedArchive = path.join(stagingRoot, path.basename(output));
 try {
  await cp(input, stagedTree, { recursive: true });
  const timestamp = new Date("1980-01-01T00:00:00.000Z");
  for (const file of await collect(stagedTree))
    await utimes(file.absolute, timestamp, timestamp);
  await execute(
    "zip",
    [
      "-X",
      "-q",
      "-9",
      stagedArchive,
      ...sourceFiles.map((file) => file.relative),
    ],
    { cwd: stagedTree, maxBuffer: 1024 * 1024 },
  );
  const archive = await readFile(stagedArchive);
  const digest = createHash("sha256").update(archive).digest("hex");
  const stagedChecksum = `${stagedArchive}.sha256`;
  await writeFile(stagedChecksum, `${digest}  ${path.basename(output)}\n`, {
    mode: 0o644,
  });
  if (force) {
    await rm(output, { force: true });
    await rm(checksumOutput, { force: true });
  }
  await rename(stagedArchive, output);
  await rename(stagedChecksum, checksumOutput);
  console.log(
    `Created ${path.relative(root, output)} (${archive.byteLength} bytes, ${sourceFiles.length} files)\nSHA-256 ${digest}`,
  );
 } finally {
  await rm(stagingRoot, { recursive: true, force: true });
 }
@@ -0,0 +1,65 @@
 import { cp, mkdir, readFile, readdir, rm, writeFile } from "node:fs/promises";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
 const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
 const destination = path.join(root, "public");
 const required = [
  "LICENSE",
  "README.md",
  "CHANGELOG.md",
  "SOURCE.md",
  "SECURITY.md",
  "THIRD_PARTY_NOTICES.md",
 ];
 await mkdir(destination, { recursive: true });
 for (const name of required) {
  await readFile(path.join(root, name));
  await cp(path.join(root, name), path.join(destination, name));
 }
 const publicLicenses = path.join(destination, "LICENSES");
 await rm(publicLicenses, { recursive: true, force: true });
 await cp(path.join(root, "LICENSES"), publicLicenses, { recursive: true });
 const lock = JSON.parse(
  await readFile(path.join(root, "package-lock.json"), "utf8"),
 );
 const sections = [];
 for (const [location, locked] of Object.entries(lock.packages ?? {}).sort(
  ([left], [right]) => left.localeCompare(right),
 )) {
  if (!location.includes("node_modules/") || locked.dev === true) continue;
  const packageDirectory = path.join(root, location);
  const details = JSON.parse(
    await readFile(path.join(packageDirectory, "package.json"), "utf8"),
  );
  const candidates = (await readdir(packageDirectory))
    .filter((name) => /^(?:licen[cs]e|copying|notice)(?:\.|$)/iu.test(name))
    .sort();
  const texts = [];
  for (const candidate of candidates) {
    try {
      texts.push(
        `--- ${candidate} ---\n${await readFile(path.join(packageDirectory, candidate), "utf8")}`,
      );
    } catch {
      /* Ignore directories and non-text aliases. */
    }
  }
  sections.push(
    [
      "=".repeat(78),
      `${details.name}@${details.version}`,
      `Declared licence: ${details.license ?? locked.license ?? "See upstream"}`,
      `Installed from: ${location}`,
      "=".repeat(78),
      texts.join("\n\n") ||
        "No package-local licence file was present; see THIRD_PARTY_NOTICES.md.",
    ].join("\n"),
  );
 }
 await writeFile(
  path.join(publicLicenses, "npm-runtime-licenses.txt"),
  `${sections.join("\n\n")}\n`,
 );
 console.log("Prepared static release notices");
@@ -0,0 +1,74 @@
 import { createServer } from "node:http";
 import { readFile, stat } from "node:fs/promises";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
 const root = path.resolve(
  path.dirname(fileURLToPath(import.meta.url)),
  "..",
  "dist",
 );
 const nestedPrefix = "/deep/nested/auth/";
 const mediaTypes = new Map([
  [".css", "text/css; charset=utf-8"],
  [".html", "text/html; charset=utf-8"],
  [".js", "text/javascript; charset=utf-8"],
  [".json", "application/json; charset=utf-8"],
  [".svg", "image/svg+xml"],
  [".md", "text/markdown; charset=utf-8"],
  [".txt", "text/plain; charset=utf-8"],
 ]);
 const headers = {
  "Content-Security-Policy":
    "default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; connect-src 'self'; worker-src 'self' blob:; manifest-src 'self'",
  "Cross-Origin-Opener-Policy": "same-origin",
  "Cross-Origin-Resource-Policy": "same-origin",
  "Permissions-Policy": "camera=(), microphone=(), geolocation=(), usb=()",
  "Referrer-Policy": "no-referrer",
  "X-Content-Type-Options": "nosniff",
 };
 function safeFile(requestPath) {
  const decoded = decodeURIComponent(requestPath);
  const relative = decoded.startsWith(nestedPrefix)
    ? decoded.slice(nestedPrefix.length)
    : decoded.replace(/^\/+/, "");
  const normalized = path.posix.normalize(relative || "index.html");
  if (
    normalized === ".." ||
    normalized.startsWith("../") ||
    path.isAbsolute(normalized)
  )
    return null;
  return path.join(root, normalized);
 }
 const server = createServer(async (request, response) => {
  try {
    const url = new URL(request.url ?? "/", "http://127.0.0.1");
    let file = safeFile(url.pathname);
    if (!file) {
      response.writeHead(400).end("Bad request");
      return;
    }
    if ((await stat(file).catch(() => null))?.isDirectory())
      file = path.join(file, "index.html");
    const content = await readFile(file);
    response.writeHead(200, {
      "Content-Type":
        mediaTypes.get(path.extname(file)) ?? "application/octet-stream",
      "Cache-Control": "no-cache",
      ...headers,
    });
    response.end(content);
  } catch {
    response.writeHead(404, { "Content-Type": "text/plain; charset=utf-8" });
    response.end("Not found");
  }
 });
 server.listen(4173, "127.0.0.1", () =>
  console.log(
    "Authentication Tools test server listening on http://127.0.0.1:4173",
  ),
 );
@@ -0,0 +1,41 @@
 import { lazy, Suspense, useState } from "react";
 import { AppShell } from "@add-ideas/toolbox-shell-react";
 import "@add-ideas/toolbox-shell-react/styles.css";
 import "./styles.css";
 import { AppErrorBoundary } from "./components/AppErrorBoundary";
 import { HelpDialog } from "./components/HelpDialog";
 import { manifest } from "./toolbox/manifest";
 const Workbench = lazy(async () => ({
  default: (await import("./components/Workbench")).Workbench,
 }));
 export function App() {
  const [helpOpen, setHelpOpen] = useState(false);
  return (
    <AppErrorBoundary>
      <AppShell
        app={manifest}
        manifestUrl="./toolbox-app.json"
        helpAction={{ onClick: () => setHelpOpen(true) }}
        onContextError={(error) =>
          console.warn(
            "Toolbox context unavailable; continuing standalone.",
            error,
          )
        }
      >
        <Suspense
          fallback={
            <p className="workbench-loading" role="status">
              Preparing the local authentication workbench…
            </p>
          }
        >
          <Workbench />
        </Suspense>
      </AppShell>
      <HelpDialog open={helpOpen} onClose={() => setHelpOpen(false)} />
    </AppErrorBoundary>
  );
 }
@@ -0,0 +1,38 @@
 import { Component, type ErrorInfo, type ReactNode } from "react";
 interface Props {
  children: ReactNode;
 }
 interface State {
  error: Error | null;
 }
 export class AppErrorBoundary extends Component<Props, State> {
  state: State = { error: null };
  static getDerivedStateFromError(error: Error): State {
    return { error };
  }
  componentDidCatch(error: Error, info: ErrorInfo): void {
    console.error(
      "OTP & Passkey Tools encountered an unrecoverable interface error",
      error,
      info,
    );
  }
  render(): ReactNode {
    if (!this.state.error) return this.props.children;
    return (
      <main className="fatal-error" role="alert">
        <h1>Authentication tools could not continue</h1>
        <p>{this.state.error.message}</p>
        <button
          type="button"
          className="primary-button"
          onClick={() => globalThis.location.reload()}
        >
          Reload application
        </button>
      </main>
    );
  }
 }
@@ -0,0 +1,81 @@
 import { useEffect, useRef } from "react";
 export function HelpDialog({
  open,
  onClose,
 }: {
  open: boolean;
  onClose: () => void;
 }) {
  const ref = useRef<HTMLDialogElement>(null);
  useEffect(() => {
    const dialog = ref.current;
    if (!dialog) return;
    if (open && !dialog.open) dialog.showModal();
    if (!open && dialog.open) dialog.close();
  }, [open]);
  return (
    <dialog ref={ref} className="tool-dialog" onClose={onClose}>
      <div className="dialog-heading">
        <div>
          <p className="eyebrow">Local authentication laboratory</p>
          <h2>OTP & Passkey Tools help</h2>
        </div>
        <button
          className="icon-button"
          type="button"
          aria-label="Close help"
          onClick={onClose}
        >
          ×
        </button>
      </div>
      <div className="dialog-body prose">
        <h3>Handle secrets deliberately</h3>
        <p>
          OTP seeds are equivalent to a second-factor credential. This app keeps
          them in memory only, masks them by default and clears them on reload.
          Exports are explicit and unencrypted; move them only through a secure
          channel.
        </p>
        <h3>OTP clock and counters</h3>
        <p>
          TOTP is computed from this device’s clock. A rejected valid-looking
          value commonly means clock drift, a different period, or the wrong
          hash/digit profile. HOTP counters must remain synchronized.
        </p>
        <h3>Passkey inspection</h3>
        <p>
          Inspection is offline. Verification is layered: client-data
          expectations, RP ID hash, authenticator flags, counter and
          cryptographic signature are reported separately. Metadata is never
          fetched silently.
        </p>
        <h3>Live ceremonies</h3>
        <p>
          WebAuthn credentials belong to an exact RP ID. Live tests are enabled
          only on localhost or the dedicated authentication hostname. The shared
          Toolbox origin remains inspect-only so unrelated apps do not share its
          credential namespace.
        </p>
        <p>
          No authentication material, file, telemetry or request leaves this
          tab.
        </p>
      </div>
      <div className="dialog-actions">
        <a
          className="secondary-button"
          href="https://git.add-ideas.de/lotobo/auth-tools"
          target="_blank"
          rel="noreferrer"
        >
          Source and issues
        </a>
        <button className="primary-button" type="button" onClick={onClose}>
          Done
        </button>
      </div>
    </dialog>
  );
 }
@@ -0,0 +1,56 @@
 import { useCallback, useState } from "react";
 import { OtpWorkspace } from "./otp/OtpWorkspace";
 import { WebAuthnWorkspace } from "./webauthn/WebAuthnWorkspace";
 type Workspace = "otp" | "passkeys";
 export function Workbench() {
  const [workspace, setWorkspace] = useState<Workspace>("otp");
  const [session, setSession] = useState(0);
  const clear = useCallback(() => setSession((value) => value + 1), []);
  return (
    <main className="auth-application">
      <section className="privacy-strip" aria-label="Privacy status">
        <span className="status-dot" aria-hidden="true" />
        <div>
          <strong>Sensitive session · memory only</strong>
          <span> Nothing is uploaded or saved automatically.</span>
        </div>
        <button
          type="button"
          className="secondary-button compact-button"
          onClick={clear}
        >
          Clear session
        </button>
      </section>
      <nav className="workspace-tabs" aria-label="Authentication tool family">
        <button
          type="button"
          className={workspace === "otp" ? "active" : ""}
          aria-current={workspace === "otp" ? "page" : undefined}
          onClick={() => setWorkspace("otp")}
        >
          <span aria-hidden="true">123</span>
          <strong>OTP</strong>
          <small>HOTP, TOTP and migrations</small>
        </button>
        <button
          type="button"
          className={workspace === "passkeys" ? "active" : ""}
          aria-current={workspace === "passkeys" ? "page" : undefined}
          onClick={() => setWorkspace("passkeys")}
        >
          <span aria-hidden="true">◇</span>
          <strong>WebAuthn / Passkeys</strong>
          <small>Inspect, verify and test</small>
        </button>
      </nav>
      {workspace === "otp" ? (
        <OtpWorkspace key={`otp-${session}`} />
      ) : (
        <WebAuthnWorkspace key={`passkeys-${session}`} />
      )}
    </main>
  );
 }
@@ -0,0 +1,854 @@
 import { useEffect, useMemo, useState } from "react";
 import {
  base32ToBytes,
  bytesToBase32,
  randomBytes,
 } from "../../crypto/encoding";
 import {
  exportCsv,
  exportOtpAuthList,
  importCsv,
  importGoogleMigration,
  importOtpAuthList,
  importPlainPskc,
  type ImportResult,
 } from "../../otp/migration";
 import {
  hotp,
  totp,
  verifyHotp,
  verifyTotp,
  type OtpHashAlgorithm,
  type OtpKind,
 } from "../../otp/otp";
 import { hashOcraPassword, ocra, parseOcraSuite } from "../../otp/ocra";
 import {
  profileStrength,
  serializeOtpAuth,
  type OtpProfile,
 } from "../../otp/profile";
 import { qrSvg } from "../../qr/encoder";
 function downloadText(
  name: string,
  content: string,
  type = "text/plain;charset=utf-8",
 ): void {
  const url = URL.createObjectURL(new Blob([content], { type }));
  const link = document.createElement("a");
  link.href = url;
  link.download = name;
  link.click();
  setTimeout(() => URL.revokeObjectURL(url), 0);
 }
 function initialProfile(): OtpProfile {
  return {
    kind: "totp",
    secret: randomBytes(20),
    issuer: "",
    account: "",
    algorithm: "SHA-1",
    digits: 6,
    period: 30,
    counter: 0n,
    extensions: new Map(),
  };
 }
 function detectImport(input: string): ImportResult {
  const trimmed = input.trim();
  if (trimmed.startsWith("otpauth-migration://"))
    return importGoogleMigration(trimmed);
  if (trimmed.startsWith("<")) return importPlainPskc(trimmed);
  if (/^otpauth:\/\//imu.test(trimmed)) return importOtpAuthList(trimmed);
  return importCsv(trimmed);
 }
 interface BarcodeResult {
  rawValue: string;
 }
 interface BarcodeDetectorLike {
  detect(source: ImageBitmap): Promise<BarcodeResult[]>;
 }
 interface BarcodeDetectorConstructor {
  new (options: { formats: string[] }): BarcodeDetectorLike;
 }
 export function OtpWorkspace() {
  const [profile, setProfile] = useState<OtpProfile>(initialProfile);
  const [secretText, setSecretText] = useState(() =>
    bytesToBase32(profile.secret),
  );
  const [secretVisible, setSecretVisible] = useState(false);
  const [now, setNow] = useState(() => Date.now());
  const [code, setCode] = useState("······");
  const [verifyCode, setVerifyCode] = useState("");
  const [verification, setVerification] = useState("");
  const [error, setError] = useState("");
  const [mode, setMode] = useState<"credential" | "ocra" | "migration">(
    "credential",
  );
  const [migrationText, setMigrationText] = useState("");
  const [imported, setImported] = useState<OtpProfile[]>([]);
  const [warnings, setWarnings] = useState<string[]>([]);
  useEffect(() => {
    const timer = window.setInterval(() => setNow(Date.now()), 500);
    return () => window.clearInterval(timer);
  }, []);
  useEffect(() => {
    let active = true;
    const generate =
      profile.kind === "totp"
        ? totp({
            secret: profile.secret,
            algorithm: profile.algorithm,
            digits: profile.digits,
            period: profile.period,
            timestamp: now / 1000,
          })
        : hotp({
            secret: profile.secret,
            algorithm: profile.algorithm,
            digits: profile.digits,
            counter: profile.counter,
          });
    void generate
      .then((value) => {
        if (active) setCode(value);
      })
      .catch((reason: unknown) => {
        if (active)
          setError(
            reason instanceof Error ? reason.message : "OTP generation failed.",
          );
      });
    return () => {
      active = false;
    };
  }, [profile, now]);
  const uri = useMemo(() => {
    try {
      return serializeOtpAuth(profile);
    } catch {
      return "";
    }
  }, [profile]);
  const qr = useMemo(() => {
    try {
      return uri ? qrSvg(uri) : "";
    } catch {
      return "";
    }
  }, [uri]);
  const strength = useMemo(() => profileStrength(profile), [profile]);
  const remaining =
    profile.kind === "totp"
      ? profile.period - (Math.floor(now / 1000) % profile.period)
      : null;
  const update = <Key extends keyof OtpProfile>(
    key: Key,
    value: OtpProfile[Key],
  ) => setProfile((current) => ({ ...current, [key]: value }));
  const updateSecret = (value: string) => {
    setSecretText(value);
    try {
      const secret = base32ToBytes(value, {
        allowPadding: true,
        allowSeparators: true,
      });
      if (!secret.length) throw new Error("Secret is empty.");
      update("secret", secret);
      setError("");
    } catch (reason) {
      setError(
        reason instanceof Error ? reason.message : "Invalid Base32 secret.",
      );
    }
  };
  const regenerate = () => {
    const secret = randomBytes(
      profile.algorithm === "SHA-512"
        ? 64
        : profile.algorithm === "SHA-256"
          ? 32
          : 20,
    );
    setSecretText(bytesToBase32(secret));
    update("secret", secret);
    setError("");
  };
  const verify = async () => {
    try {
      const match =
        profile.kind === "totp"
          ? await verifyTotp(verifyCode, {
              secret: profile.secret,
              algorithm: profile.algorithm,
              digits: profile.digits,
              period: profile.period,
              timestamp: now / 1000,
              window: 2,
            })
          : await verifyHotp(verifyCode, {
              secret: profile.secret,
              algorithm: profile.algorithm,
              digits: profile.digits,
              counter: profile.counter,
              lookAhead: 20,
            });
      setVerification(
        match
          ? `Valid · ${match.delta === 0 ? "current moving factor" : `offset ${match.delta > 0 ? "+" : ""}${match.delta}`}`
          : "No match in the diagnostic window.",
      );
    } catch (reason) {
      setVerification(
        reason instanceof Error ? reason.message : "Verification failed.",
      );
    }
  };
  const performImport = (text = migrationText) => {
    try {
      const result = detectImport(text);
      setImported(result.profiles);
      setWarnings(result.warnings);
      setError("");
      if (result.profiles[0]) {
        setProfile(result.profiles[0]);
        setSecretText(bytesToBase32(result.profiles[0].secret));
      }
    } catch (reason) {
      setError(reason instanceof Error ? reason.message : "Import failed.");
      setImported([]);
    }
  };
  const scanQr = async (file: File) => {
    try {
      if (file.size > 16 * 1024 * 1024)
        throw new Error("QR image is larger than the 16 MiB safety limit.");
      const Constructor = (
        globalThis as typeof globalThis & {
          BarcodeDetector?: BarcodeDetectorConstructor;
        }
      ).BarcodeDetector;
      if (!Constructor)
        throw new Error(
          "This browser has no BarcodeDetector. Paste the provisioning URI instead.",
        );
      const bitmap = await createImageBitmap(file);
      try {
        if (
          bitmap.width > 4096 ||
          bitmap.height > 4096 ||
          bitmap.width * bitmap.height > 16_777_216
        )
          throw new Error(
            "QR image dimensions exceed the 4096 px / 16-megapixel safety limit.",
          );
        const results = await new Constructor({ formats: ["qr_code"] }).detect(
          bitmap,
        );
        if (!results[0]?.rawValue)
          throw new Error("No QR code was found in the image.");
        setMigrationText(results[0].rawValue);
        performImport(results[0].rawValue);
      } finally {
        bitmap.close();
      }
    } catch (reason) {
      setError(
        reason instanceof Error ? reason.message : "QR decoding failed.",
      );
    }
  };
  return (
    <section className="workspace">
      <div className="subtabs" role="tablist" aria-label="OTP tasks">
        <button
          type="button"
          className={mode === "credential" ? "active" : ""}
          onClick={() => setMode("credential")}
        >
          Credential lab
        </button>
        <button
          type="button"
          className={mode === "ocra" ? "active" : ""}
          onClick={() => setMode("ocra")}
        >
          OCRA challenge
        </button>
        <button
          type="button"
          className={mode === "migration" ? "active" : ""}
          onClick={() => setMode("migration")}
        >
          Import & migration
        </button>
      </div>
      {error && (
        <div className="notice error" role="alert">
          {error}
          <button
            type="button"
            aria-label="Dismiss error"
            onClick={() => setError("")}
          >
            ×
          </button>
        </div>
      )}
      {mode === "credential" ? (
        <div className="otp-grid">
          <article className="panel editor-panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Provisioning profile</p>
                <h2>Credential parameters</h2>
              </div>
              <span className="badge">{strength.secretBits} bit secret</span>
            </div>
            <div className="panel-body form-grid">
              <label>
                <span>Type</span>
                <select
                  value={profile.kind}
                  onChange={(event) =>
                    update("kind", event.target.value as OtpKind)
                  }
                >
                  <option value="totp">TOTP · time based</option>
                  <option value="hotp">HOTP · counter based</option>
                </select>
              </label>
              <label>
                <span>Hash</span>
                <select
                  value={profile.algorithm}
                  onChange={(event) =>
                    update("algorithm", event.target.value as OtpHashAlgorithm)
                  }
                >
                  <option>SHA-1</option>
                  <option>SHA-256</option>
                  <option>SHA-512</option>
                </select>
              </label>
              <label>
                <span>Issuer</span>
                <input
                  value={profile.issuer}
                  maxLength={256}
                  placeholder="Example service"
                  onChange={(event) => update("issuer", event.target.value)}
                />
              </label>
              <label>
                <span>Account</span>
                <input
                  value={profile.account}
                  maxLength={512}
                  placeholder="name@example.org"
                  onChange={(event) => update("account", event.target.value)}
                />
              </label>
              <label className="wide">
                <span>Base32 secret</span>
                <div className="input-actions">
                  <input
                    type={secretVisible ? "text" : "password"}
                    spellCheck={false}
                    autoComplete="off"
                    value={secretText}
                    onChange={(event) => updateSecret(event.target.value)}
                  />
                  <button
                    type="button"
                    className="icon-button"
                    aria-label={secretVisible ? "Hide secret" : "Show secret"}
                    onClick={() => setSecretVisible((value) => !value)}
                  >
                    {secretVisible ? "Hide" : "Show"}
                  </button>
                  <button
                    type="button"
                    className="secondary-button"
                    onClick={regenerate}
                  >
                    Generate
                  </button>
                </div>
              </label>
              <label>
                <span>Digits</span>
                <select
                  value={profile.digits}
                  onChange={(event) =>
                    update("digits", Number(event.target.value))
                  }
                >
                  <option value="6">6</option>
                  <option value="8">8</option>
                  <option value="10">10</option>
                </select>
              </label>
              {profile.kind === "totp" ? (
                <label>
                  <span>Period (seconds)</span>
                  <input
                    type="number"
                    min="1"
                    max="86400"
                    value={profile.period}
                    onChange={(event) =>
                      update("period", Number(event.target.value))
                    }
                  />
                </label>
              ) : (
                <label>
                  <span>Counter</span>
                  <input
                    inputMode="numeric"
                    value={profile.counter.toString()}
                    onChange={(event) => {
                      if (/^\d+$/u.test(event.target.value))
                        update("counter", BigInt(event.target.value));
                    }}
                  />
                </label>
              )}
            </div>
            <details className="findings">
              <summary>Interoperability analysis</summary>
              <ul>
                {strength.findings.map((finding) => (
                  <li key={finding}>{finding}</li>
                ))}
              </ul>
            </details>
          </article>
          <article className="panel code-panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Live value</p>
                <h2>{profile.kind.toUpperCase()} code</h2>
              </div>
              {remaining !== null && (
                <span className="countdown">{remaining}s</span>
              )}
            </div>
            <div className="code-display" aria-live="polite">
              {code.match(/.{1,3}/gu)?.join(" ")}
            </div>
            <div className="progress" aria-hidden="true">
              {remaining !== null && (
                <span
                  style={{ width: `${(remaining / profile.period) * 100}%` }}
                />
              )}
            </div>
            <div className="verify-row">
              <input
                aria-label="Code to verify"
                inputMode="numeric"
                placeholder={`${profile.digits}-digit code`}
                value={verifyCode}
                onChange={(event) => setVerifyCode(event.target.value)}
              />
              <button
                type="button"
                className="primary-button"
                onClick={() => void verify()}
              >
                Verify
              </button>
            </div>
            {verification && (
              <p className="verification" role="status">
                {verification}
              </p>
            )}
            {uri ? (
              <>
                <div className="qr" dangerouslySetInnerHTML={{ __html: qr }} />
                <label className="wide">
                  <span>Provisioning URI</span>
                  <textarea
                    readOnly
                    rows={4}
                    value={
                      secretVisible
                        ? uri
                        : uri.replace(/([?&]secret=)[^&]+/u, "$1••••••••")
                    }
                  />
                </label>
                <div className="button-row">
                  <button
                    type="button"
                    className="secondary-button"
                    onClick={() => void navigator.clipboard.writeText(uri)}
                  >
                    Copy URI
                  </button>
                  <button
                    type="button"
                    className="secondary-button"
                    onClick={() =>
                      downloadText("otp-provisioning.svg", qr, "image/svg+xml")
                    }
                  >
                    Download QR
                  </button>
                </div>
              </>
            ) : (
              <p className="empty-state">
                Add an account label to create a provisioning URI and QR.
              </p>
            )}
          </article>
        </div>
      ) : mode === "ocra" ? (
        <OcraLab />
      ) : (
        <div className="migration-grid">
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Import locally</p>
                <h2>Provisioning and migration data</h2>
              </div>
            </div>
            <div className="panel-body">
              <p className="hint">
                Paste one or more <code>otpauth://</code> URIs, a Google
                Authenticator migration URI, the app’s CSV format, or
                plain-secret PSKC XML.
              </p>
              <textarea
                className="migration-input"
                rows={12}
                value={migrationText}
                onChange={(event) => setMigrationText(event.target.value)}
                placeholder="Paste migration data. It never leaves this tab."
              />
              <div className="button-row">
                <button
                  type="button"
                  className="primary-button"
                  onClick={() => performImport()}
                >
                  Inspect import
                </button>
                <label className="secondary-button file-button">
                  Read QR image
                  <input
                    type="file"
                    accept="image/*"
                    onChange={(event) => {
                      const file = event.target.files?.[0];
                      if (file) void scanQr(file);
                    }}
                  />
                </label>
              </div>
            </div>
          </article>
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Review before export</p>
                <h2>
                  {imported.length
                    ? `${imported.length} credential${imported.length === 1 ? "" : "s"}`
                    : "No imported credentials"}
                </h2>
              </div>
            </div>
            <div className="credential-list">
              {imported.map((item, index) => (
                <button
                  type="button"
                  key={`${item.issuer}-${item.account}-${index}`}
                  onClick={() => {
                    setProfile(item);
                    setSecretText(bytesToBase32(item.secret));
                    setMode("credential");
                  }}
                >
                  <strong>{item.issuer || "No issuer"}</strong>
                  <span>{item.account}</span>
                  <small>
                    {item.kind.toUpperCase()} · {item.algorithm} · {item.digits}{" "}
                    digits
                  </small>
                </button>
              ))}
            </div>
            {warnings.length > 0 && (
              <div className="warnings">
                <strong>Import notes</strong>
                <ul>
                  {warnings.map((warning) => (
                    <li key={warning}>{warning}</li>
                  ))}
                </ul>
              </div>
            )}
            {imported.length > 0 && (
              <div className="panel-footer">
                <p>Exports contain unencrypted secrets.</p>
                <div className="button-row">
                  <button
                    type="button"
                    className="secondary-button"
                    onClick={() =>
                      downloadText(
                        "otp-credentials.txt",
                        exportOtpAuthList(imported),
                      )
                    }
                  >
                    Export URI list
                  </button>
                  <button
                    type="button"
                    className="secondary-button"
                    onClick={() =>
                      downloadText(
                        "otp-credentials.csv",
                        exportCsv(imported),
                        "text/csv;charset=utf-8",
                      )
                    }
                  >
                    Export CSV
                  </button>
                </div>
              </div>
            )}
          </article>
        </div>
      )}
    </section>
  );
 }
 function OcraLab() {
  const [suiteText, setSuiteText] = useState("OCRA-1:HOTP-SHA1-6:QN08");
  const [secretText, setSecretText] = useState(() =>
    bytesToBase32(randomBytes(20)),
  );
  const [secretVisible, setSecretVisible] = useState(false);
  const [question, setQuestion] = useState("00000000");
  const [counter, setCounter] = useState("0");
  const [password, setPassword] = useState("");
  const [session, setSession] = useState("");
  const [response, setResponse] = useState("");
  const [error, setError] = useState("");
  const suite = useMemo(() => {
    try {
      return parseOcraSuite(suiteText);
    } catch {
      return null;
    }
  }, [suiteText]);
  const compute = async () => {
    try {
      const parsed = parseOcraSuite(suiteText);
      const passwordHash = parsed.passwordAlgorithm
        ? await hashOcraPassword(password, parsed.passwordAlgorithm)
        : undefined;
      const value = await ocra({
        suite: parsed,
        secret: base32ToBytes(secretText, {
          allowPadding: true,
          allowSeparators: true,
        }),
        question,
        ...(parsed.counter ? { counter: BigInt(counter) } : {}),
        ...(passwordHash ? { passwordHash } : {}),
        ...(parsed.sessionLength !== undefined
          ? { session: new TextEncoder().encode(session) }
          : {}),
      });
      setResponse(value);
      setError("");
    } catch (reason) {
      setError(
        reason instanceof Error ? reason.message : "OCRA computation failed.",
      );
      setResponse("");
    }
  };
  return (
    <div className="split-grid">
      <article className="panel">
        <div className="panel-heading">
          <div>
            <p className="eyebrow">RFC 6287</p>
            <h2>OCRA suite and key</h2>
          </div>
          <span className="badge">Challenge-response</span>
        </div>
        <div className="panel-body compact-form">
          <label>
            <span>OCRASuite</span>
            <input
              spellCheck={false}
              value={suiteText}
              onChange={(event) => setSuiteText(event.target.value)}
            />
          </label>
          <label>
            <span>Base32 shared secret</span>
            <div className="input-actions">
              <input
                type={secretVisible ? "text" : "password"}
                spellCheck={false}
                autoComplete="off"
                value={secretText}
                onChange={(event) => setSecretText(event.target.value)}
              />
              <button
                type="button"
                className="icon-button"
                onClick={() => setSecretVisible((value) => !value)}
              >
                {secretVisible ? "Hide" : "Show"}
              </button>
            </div>
          </label>
          {suite ? (
            <dl className="suite-summary">
              <div>
                <dt>HMAC / output</dt>
                <dd>
                  {suite.algorithm} ·{" "}
                  {suite.digits === 0
                    ? "full digest"
                    : `${suite.digits} digits`}
                </dd>
              </div>
              <div>
                <dt>Question</dt>
                <dd>
                  {suite.questionFormat} · up to {suite.questionLength}
                </dd>
              </div>
              <div>
                <dt>Additional inputs</dt>
                <dd>
                  {[
                    suite.counter && "counter",
                    suite.passwordAlgorithm &&
                      `${suite.passwordAlgorithm} PIN hash`,
                    suite.sessionLength &&
                      `${suite.sessionLength}-byte session`,
                    suite.timeStepSeconds &&
                      `${suite.timeStepSeconds}s time step`,
                  ]
                    .filter(Boolean)
                    .join(", ") || "none"}
                </dd>
              </div>
            </dl>
          ) : (
            <p className="hint">
              Enter a valid OCRA-1 suite to inspect its inputs.
            </p>
          )}
        </div>
      </article>
      <article className="panel">
        <div className="panel-heading">
          <div>
            <p className="eyebrow">Explicit data input</p>
            <h2>Compute response</h2>
          </div>
        </div>
        <div className="panel-body compact-form">
          <label>
            <span>Challenge question</span>
            <input
              spellCheck={false}
              value={question}
              onChange={(event) => setQuestion(event.target.value)}
            />
          </label>
          {suite?.counter && (
            <label>
              <span>Counter</span>
              <input
                inputMode="numeric"
                value={counter}
                onChange={(event) => setCounter(event.target.value)}
              />
            </label>
          )}
          {suite?.passwordAlgorithm && (
            <label>
              <span>
                PIN / password · hashed locally with {suite.passwordAlgorithm}
              </span>
              <input
                type="password"
                autoComplete="off"
                value={password}
                onChange={(event) => setPassword(event.target.value)}
              />
            </label>
          )}
          {suite?.sessionLength !== undefined && (
            <label>
              <span>
                UTF-8 session data · padded to {suite.sessionLength} bytes
              </span>
              <textarea
                rows={3}
                value={session}
                onChange={(event) => setSession(event.target.value)}
              />
            </label>
          )}
          {suite?.timeStepSeconds !== undefined && (
            <p className="hint">
              Timestamp input uses the current Unix time and the suite’s{" "}
              {suite.timeStepSeconds}-second step.
            </p>
          )}
          <button
            type="button"
            className="primary-button"
            onClick={() => void compute()}
          >
            Compute OCRA response
          </button>
          {error && (
            <p className="inline-error" role="alert">
              {error}
            </p>
          )}
          {response && (
            <div className="ocra-response" aria-live="polite">
              <span>Response</span>
              <strong>{response}</strong>
            </div>
          )}
          <p className="hint">
            OCRA responses are meaningful only inside a protocol that validates
            challenges once, synchronizes counters when used, and protects the
            channel.
          </p>
        </div>
      </article>
    </div>
  );
 }
@@ -0,0 +1,596 @@
 import { useEffect, useMemo, useState } from "react";
 import {
  base64UrlToBytes,
  bytesToBase64Url,
  randomBytes,
 } from "../../crypto/encoding";
 import {
  detectCapabilities,
  createMemoryCredential,
  exerciseMemoryCredential,
  liveLabAvailability,
  LIVE_HOST,
  type BrowserCapabilities,
  type MemoryCredential,
 } from "../../webauthn/live";
 import {
  cborDiagnostic,
  parseAttestationObject,
  parseAuthenticatorData,
  parseClientData,
 } from "../../webauthn/parser";
 import {
  coseKeyToJson,
  verifyAssertion,
  type AssertionVerificationResult,
 } from "../../webauthn/verify";
 type InspectKind = "client" | "attestation" | "authenticator";
 function diagnostic(kind: InspectKind, input: string): unknown {
  if (kind === "client") return parseClientData(input.trim());
  if (kind === "authenticator")
    return parseAuthenticatorData(base64UrlToBytes(input.trim()));
  const result = parseAttestationObject(input.trim());
  return {
    format: result.format,
    statement: cborDiagnostic(result.statement),
    authenticator: {
      ...result.authenticator,
      raw: bytesToBase64Url(result.authenticator.raw),
      ...(result.authenticator.attestedCredential
        ? {
            attestedCredential: {
              ...result.authenticator.attestedCredential,
              credentialPublicKey: coseKeyToJson(
                result.authenticator.attestedCredential.credentialPublicKey,
              ),
            },
          }
        : {}),
      ...(result.authenticator.extensions
        ? { extensions: cborDiagnostic(result.authenticator.extensions) }
        : {}),
    },
  };
 }
 function capabilityLabel(value: boolean | null): string {
  return value === null ? "Not exposed" : value ? "Available" : "Unavailable";
 }
 const EMPTY_ASSERTION = {
  clientDataJSON: "",
  authenticatorData: "",
  signature: "",
  credentialPublicKey: "",
  expectedChallenge: "",
  expectedOrigin: typeof location === "undefined" ? "" : location.origin,
  expectedRpId: typeof location === "undefined" ? "" : location.hostname,
 };
 export function WebAuthnWorkspace() {
  const [mode, setMode] = useState<"inspect" | "verify" | "options" | "live">(
    "inspect",
  );
  const [inspectKind, setInspectKind] = useState<InspectKind>("client");
  const [inspectInput, setInspectInput] = useState("");
  const [inspectOutput, setInspectOutput] = useState("");
  const [error, setError] = useState("");
  const [assertion, setAssertion] = useState(EMPTY_ASSERTION);
  const [verification, setVerification] =
    useState<AssertionVerificationResult | null>(null);
  const [capabilities, setCapabilities] = useState<BrowserCapabilities | null>(
    null,
  );
  const [credential, setCredential] = useState<MemoryCredential | null>(null);
  const [liveResult, setLiveResult] =
    useState<AssertionVerificationResult | null>(null);
  const [busy, setBusy] = useState(false);
  const [userName, setUserName] = useState("local-user");
  const [requireUv, setRequireUv] = useState(true);
  const availability = useMemo(() => liveLabAvailability(window.location), []);
  useEffect(() => {
    void detectCapabilities().then(setCapabilities);
  }, []);
  const inspect = () => {
    try {
      setInspectOutput(
        JSON.stringify(diagnostic(inspectKind, inspectInput), null, 2),
      );
      setError("");
    } catch (reason) {
      setError(
        reason instanceof Error
          ? reason.message
          : "Input could not be decoded.",
      );
    }
  };
  const verify = async () => {
    try {
      setVerification(
        await verifyAssertion({
          ...assertion,
          requireUserVerification: requireUv,
        }),
      );
      setError("");
    } catch (reason) {
      setError(
        reason instanceof Error
          ? reason.message
          : "Assertion verification failed.",
      );
      setVerification(null);
    }
  };
  const create = async () => {
    setBusy(true);
    setError("");
    setLiveResult(null);
    try {
      setCredential(
        await createMemoryCredential({
          userName,
          userDisplayName: userName,
          attestation: "none",
        }),
      );
    } catch (reason) {
      setError(
        reason instanceof Error ? reason.message : "Registration failed.",
      );
    } finally {
      setBusy(false);
    }
  };
  const exercise = async () => {
    if (!credential) return;
    setBusy(true);
    setError("");
    try {
      const result = await exerciseMemoryCredential(credential, requireUv);
      setLiveResult(result);
      if (result.verified)
        setCredential((current) =>
          current ? { ...current, signCount: result.signCount } : current,
        );
    } catch (reason) {
      setError(
        reason instanceof Error ? reason.message : "Authentication failed.",
      );
    } finally {
      setBusy(false);
    }
  };
  const optionExample = useMemo(
    () => ({
      registration: {
        challenge: bytesToBase64Url(randomBytes(32)),
        rp: { id: location.hostname, name: "Example relying party" },
        user: {
          id: bytesToBase64Url(randomBytes(32)),
          name: "user@example.org",
          displayName: "Example user",
        },
        pubKeyCredParams: [
          { type: "public-key", alg: -7 },
          { type: "public-key", alg: -257 },
        ],
        authenticatorSelection: {
          residentKey: "preferred",
          userVerification: "preferred",
        },
        timeout: 120000,
        attestation: "none",
      },
      authentication: {
        challenge: bytesToBase64Url(randomBytes(32)),
        rpId: location.hostname,
        userVerification: "preferred",
        timeout: 120000,
      },
    }),
    [],
  );
  return (
    <section className="workspace">
      <div className="subtabs" role="tablist" aria-label="WebAuthn tasks">
        <button
          type="button"
          className={mode === "inspect" ? "active" : ""}
          onClick={() => setMode("inspect")}
        >
          Inspector
        </button>
        <button
          type="button"
          className={mode === "verify" ? "active" : ""}
          onClick={() => setMode("verify")}
        >
          Assertion verifier
        </button>
        <button
          type="button"
          className={mode === "options" ? "active" : ""}
          onClick={() => setMode("options")}
        >
          Options builder
        </button>
        <button
          type="button"
          className={mode === "live" ? "active" : ""}
          onClick={() => setMode("live")}
        >
          Live ceremony
        </button>
      </div>
      {error && (
        <div className="notice error" role="alert">
          {error}
          <button
            type="button"
            aria-label="Dismiss error"
            onClick={() => setError("")}
          >
            ×
          </button>
        </div>
      )}
      {mode === "inspect" && (
        <div className="split-grid">
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Offline decoder</p>
                <h2>WebAuthn structure</h2>
              </div>
            </div>
            <div className="panel-body">
              <label>
                <span>Input type</span>
                <select
                  value={inspectKind}
                  onChange={(event) =>
                    setInspectKind(event.target.value as InspectKind)
                  }
                >
                  <option value="client">clientDataJSON · Base64url</option>
                  <option value="attestation">
                    attestationObject · Base64url CBOR
                  </option>
                  <option value="authenticator">
                    authenticatorData · Base64url
                  </option>
                </select>
              </label>
              <label>
                <span>Encoded input</span>
                <textarea
                  className="mono-input"
                  rows={16}
                  spellCheck={false}
                  value={inspectInput}
                  onChange={(event) => setInspectInput(event.target.value)}
                  placeholder="Paste Base64url without a data: prefix"
                />
              </label>
              <button
                type="button"
                className="primary-button"
                onClick={inspect}
              >
                Decode locally
              </button>
            </div>
          </article>
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Bounded parser output</p>
                <h2>Decoded fields</h2>
              </div>
            </div>
            {inspectOutput ? (
              <pre className="diagnostic-output">{inspectOutput}</pre>
            ) : (
              <div className="empty-state">
                <strong>No decoded structure yet</strong>
                <span>
                  CBOR depth, item count and byte size are limited before
                  parsing.
                </span>
              </div>
            )}
          </article>
        </div>
      )}
      {mode === "verify" && (
        <div className="split-grid verifier-grid">
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Authentication response</p>
                <h2>Assertion evidence</h2>
              </div>
            </div>
            <div className="panel-body compact-form">
              {(
                [
                  "clientDataJSON",
                  "authenticatorData",
                  "signature",
                  "credentialPublicKey",
                ] as const
              ).map((name) => (
                <label key={name}>
                  <span>
                    {name === "credentialPublicKey"
                      ? "Credential COSE key · JSON labels"
                      : `${name} · Base64url`}
                  </span>
                  <textarea
                    rows={name === "credentialPublicKey" ? 5 : 3}
                    spellCheck={false}
                    value={assertion[name]}
                    onChange={(event) =>
                      setAssertion((current) => ({
                        ...current,
                        [name]: event.target.value,
                      }))
                    }
                  />
                </label>
              ))}
            </div>
          </article>
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Expected ceremony state</p>
                <h2>Verification policy</h2>
              </div>
            </div>
            <div className="panel-body compact-form">
              {(
                ["expectedChallenge", "expectedOrigin", "expectedRpId"] as const
              ).map((name) => (
                <label key={name}>
                  <span>{name.replace("expected", "Expected ")}</span>
                  <input
                    value={assertion[name]}
                    onChange={(event) =>
                      setAssertion((current) => ({
                        ...current,
                        [name]: event.target.value,
                      }))
                    }
                  />
                </label>
              ))}
              <label className="check-row">
                <input
                  type="checkbox"
                  checked={requireUv}
                  onChange={(event) => setRequireUv(event.target.checked)}
                />
                <span>Require the user-verification flag</span>
              </label>
              <button
                type="button"
                className="primary-button"
                onClick={() => void verify()}
              >
                Verify all layers
              </button>
              {verification && <VerificationReport result={verification} />}
            </div>
          </article>
        </div>
      )}
      {mode === "options" && (
        <div className="split-grid">
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Serializable hand-off</p>
                <h2>Creation options</h2>
              </div>
            </div>
            <pre className="diagnostic-output">
              {JSON.stringify(optionExample.registration, null, 2)}
            </pre>
          </article>
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Serializable hand-off</p>
                <h2>Request options</h2>
              </div>
            </div>
            <pre className="diagnostic-output">
              {JSON.stringify(optionExample.authentication, null, 2)}
            </pre>
          </article>
          <p className="wide-note">
            Challenges and user handles above are generated locally on each
            load. In production, a relying-party server must generate, store and
            consume challenges exactly once. This builder never claims that a
            JSON shape alone completes a secure ceremony.
          </p>
        </div>
      )}
      {mode === "live" && (
        <div className="split-grid">
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Browser diagnostics</p>
                <h2>Runtime and origin</h2>
              </div>
              <span
                className={`badge ${availability.available ? "success" : "warning"}`}
              >
                {availability.available ? "Live enabled" : "Inspect only"}
              </span>
            </div>
            <div className="panel-body">
              <dl className="capability-list">
                <div>
                  <dt>Effective origin</dt>
                  <dd>{location.origin}</dd>
                </div>
                <div>
                  <dt>RP ID</dt>
                  <dd>{location.hostname}</dd>
                </div>
                <div>
                  <dt>Secure context</dt>
                  <dd>
                    {capabilityLabel(capabilities?.secureContext ?? false)}
                  </dd>
                </div>
                <div>
                  <dt>WebAuthn API</dt>
                  <dd>
                    {capabilityLabel(
                      capabilities?.publicKeyCredential ?? false,
                    )}
                  </dd>
                </div>
                <div>
                  <dt>Platform authenticator</dt>
                  <dd>
                    {capabilityLabel(
                      capabilities?.platformAuthenticator ?? null,
                    )}
                  </dd>
                </div>
                <div>
                  <dt>Conditional mediation</dt>
                  <dd>
                    {capabilityLabel(
                      capabilities?.conditionalMediation ?? null,
                    )}
                  </dd>
                </div>
              </dl>
              <p className="origin-explanation">{availability.reason}</p>
              {!availability.available && (
                <a
                  className="primary-button centered-link"
                  href={`https://${LIVE_HOST}/`}
                >
                  Open isolated ceremony lab
                </a>
              )}
            </div>
          </article>
          <article className="panel">
            <div className="panel-heading">
              <div>
                <p className="eyebrow">Ephemeral relying party</p>
                <h2>Registration and authentication</h2>
              </div>
            </div>
            <div className="panel-body compact-form">
              <label>
                <span>Local username</span>
                <input
                  value={userName}
                  maxLength={128}
                  onChange={(event) => setUserName(event.target.value)}
                />
              </label>
              <label className="check-row">
                <input
                  type="checkbox"
                  checked={requireUv}
                  onChange={(event) => setRequireUv(event.target.checked)}
                />
                <span>Require user verification during authentication</span>
              </label>
              <div className="button-row">
                <button
                  type="button"
                  className="primary-button"
                  disabled={!availability.available || busy}
                  onClick={() => void create()}
                >
                  {busy
                    ? "Waiting for browser…"
                    : credential
                      ? "Replace test credential"
                      : "Create test credential"}
                </button>
                <button
                  type="button"
                  className="secondary-button"
                  disabled={!credential || busy}
                  onClick={() => void exercise()}
                >
                  Authenticate
                </button>
              </div>
              {credential && (
                <div className="credential-card">
                  <strong>Credential held in this tab</strong>
                  <code>{credential.id}</code>
                  <span>
                    {credential.format} attestation · AAGUID {credential.aaguid}{" "}
                    · counter {credential.signCount}
                  </span>
                  <button
                    type="button"
                    className="link-button"
                    onClick={() => {
                      setCredential(null);
                      setLiveResult(null);
                    }}
                  >
                    Forget now
                  </button>
                </div>
              )}
              {liveResult && <VerificationReport result={liveResult} />}
            </div>
          </article>
        </div>
      )}
    </section>
  );
 }
 function VerificationReport({
  result,
 }: {
  result: AssertionVerificationResult;
 }) {
  return (
    <div className="verification-report" aria-live="polite">
      <strong>
        {result.verified ? "Assertion verified" : "Assertion rejected"}
      </strong>
      <ul>
        {result.checks.map((check) => (
          <li key={check.name} className={check.status}>
            <span>
              {check.status === "pass"
                ? "✓"
                : check.status === "fail"
                  ? "×"
                  : "i"}
            </span>
            <div>
              <b>{check.name}</b>
              <small>{check.detail}</small>
            </div>
          </li>
        ))}
      </ul>
    </div>
  );
 }
@@ -0,0 +1,132 @@
 export class EncodingError extends Error {
  constructor(message: string) {
    super(message);
    this.name = "EncodingError";
  }
 }
 const BASE32_ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
 export function bytesToHex(bytes: Uint8Array): string {
  return [...bytes].map((byte) => byte.toString(16).padStart(2, "0")).join("");
 }
 export function bytesToArrayBuffer(bytes: Uint8Array): ArrayBuffer {
  return Uint8Array.from(bytes).buffer;
 }
 export function hexToBytes(input: string): Uint8Array {
  const normalized = input.replace(/[\s:-]/gu, "");
  if (normalized.length === 0) return new Uint8Array();
  if (normalized.length % 2 !== 0 || !/^[0-9a-f]+$/iu.test(normalized)) {
    throw new EncodingError(
      "Hexadecimal input must contain complete byte pairs.",
    );
  }
  const output = new Uint8Array(normalized.length / 2);
  for (let index = 0; index < output.length; index += 1) {
    output[index] = Number.parseInt(
      normalized.slice(index * 2, index * 2 + 2),
      16,
    );
  }
  return output;
 }
 export function bytesToBase32(bytes: Uint8Array): string {
  let buffer = 0;
  let bits = 0;
  let output = "";
  for (const byte of bytes) {
    buffer = (buffer << 8) | byte;
    bits += 8;
    while (bits >= 5) {
      bits -= 5;
      output += BASE32_ALPHABET[(buffer >>> bits) & 31];
    }
    buffer &= (1 << bits) - 1;
  }
  if (bits > 0) output += BASE32_ALPHABET[(buffer << (5 - bits)) & 31];
  return output;
 }
 export interface Base32DecodeOptions {
  allowPadding?: boolean;
  allowSeparators?: boolean;
 }
 export function base32ToBytes(
  input: string,
  options: Base32DecodeOptions = {},
 ): Uint8Array {
  let normalized = input.trim().toUpperCase();
  if (options.allowSeparators) normalized = normalized.replace(/[\s-]/gu, "");
  if (options.allowPadding) normalized = normalized.replace(/=+$/u, "");
  if (normalized.length === 0) return new Uint8Array();
  if (!/^[A-Z2-7]+$/u.test(normalized)) {
    throw new EncodingError("Base32 uses only A–Z and 2–7.");
  }
  const output: number[] = [];
  let buffer = 0;
  let bits = 0;
  for (const character of normalized) {
    buffer = (buffer << 5) | BASE32_ALPHABET.indexOf(character);
    bits += 5;
    if (bits >= 8) {
      bits -= 8;
      output.push((buffer >>> bits) & 0xff);
      buffer &= (1 << bits) - 1;
    }
  }
  if (bits > 0 && buffer !== 0) {
    throw new EncodingError("Base32 has non-zero trailing bits.");
  }
  return Uint8Array.from(output);
 }
 export function bytesToBase64Url(bytes: Uint8Array): string {
  let binary = "";
  for (const byte of bytes) binary += String.fromCharCode(byte);
  return btoa(binary)
    .replaceAll("+", "-")
    .replaceAll("/", "_")
    .replace(/=+$/u, "");
 }
 export function base64UrlToBytes(input: string): Uint8Array {
  const normalized = input.trim();
  if (!/^[A-Za-z0-9_-]*={0,2}$/u.test(normalized)) {
    throw new EncodingError("Input is not valid unpadded Base64url.");
  }
  const raw = normalized.replaceAll("-", "+").replaceAll("_", "/");
  const padded = raw.padEnd(Math.ceil(raw.length / 4) * 4, "=");
  try {
    const binary = atob(padded);
    return Uint8Array.from(binary, (character) => character.charCodeAt(0));
  } catch {
    throw new EncodingError("Input is not valid Base64url.");
  }
 }
 export function utf8ToBytes(input: string): Uint8Array {
  return new TextEncoder().encode(input);
 }
 export function bytesToUtf8(input: Uint8Array): string {
  try {
    return new TextDecoder("utf-8", { fatal: true }).decode(input);
  } catch {
    throw new EncodingError("Bytes are not valid UTF-8.");
  }
 }
 export function randomBytes(length: number): Uint8Array {
  if (!Number.isInteger(length) || length < 16 || length > 1024) {
    throw new RangeError(
      "Random secret length must be between 16 and 1024 bytes.",
    );
  }
  const output = new Uint8Array(length);
  crypto.getRandomValues(output);
  return output;
 }
@@ -0,0 +1,9 @@
 import { StrictMode } from "react";
 import { createRoot } from "react-dom/client";
 import { App } from "./App";
 createRoot(document.getElementById("root")!).render(
  <StrictMode>
    <App />
  </StrictMode>,
 );
@@ -0,0 +1,423 @@
 import { base32ToBytes, bytesToBase32 } from "../crypto/encoding";
 import type { OtpHashAlgorithm } from "./otp";
 import { parseOtpAuth, serializeOtpAuth, type OtpProfile } from "./profile";
 export interface ImportResult {
  profiles: OtpProfile[];
  warnings: string[];
 }
 const MAX_IMPORT_BYTES = 4 * 1024 * 1024;
 function utf8(bytes: Uint8Array): string {
  try {
    return new TextDecoder("utf-8", { fatal: true }).decode(bytes);
  } catch {
    throw new Error("Migration payload contains invalid UTF-8.");
  }
 }
 function readVarint(bytes: Uint8Array, state: { offset: number }): bigint {
  let value = 0n;
  for (let shift = 0n; shift < 70n; shift += 7n) {
    if (state.offset >= bytes.length)
      throw new Error("Protocol Buffer value is truncated.");
    const byte = bytes[state.offset++]!;
    value |= BigInt(byte & 0x7f) << shift;
    if (!(byte & 0x80)) return value;
  }
  throw new Error("Protocol Buffer integer is too large.");
 }
 function readProto(bytes: Uint8Array): Map<number, Array<bigint | Uint8Array>> {
  const fields = new Map<number, Array<bigint | Uint8Array>>();
  const state = { offset: 0 };
  while (state.offset < bytes.length) {
    const tag = readVarint(bytes, state);
    const field = Number(tag >> 3n);
    const wire = Number(tag & 7n);
    if (field <= 0)
      throw new Error("Protocol Buffer contains an invalid field number.");
    let value: bigint | Uint8Array;
    if (wire === 0) value = readVarint(bytes, state);
    else if (wire === 2) {
      const length = Number(readVarint(bytes, state));
      if (
        !Number.isSafeInteger(length) ||
        length < 0 ||
        state.offset + length > bytes.length
      )
        throw new Error("Protocol Buffer field length is invalid.");
      value = bytes.slice(state.offset, state.offset + length);
      state.offset += length;
    } else if (wire === 1) {
      if (state.offset + 8 > bytes.length)
        throw new Error("Protocol Buffer field is truncated.");
      value = bytes.slice(state.offset, state.offset + 8);
      state.offset += 8;
    } else if (wire === 5) {
      if (state.offset + 4 > bytes.length)
        throw new Error("Protocol Buffer field is truncated.");
      value = bytes.slice(state.offset, state.offset + 4);
      state.offset += 4;
    } else throw new Error(`Unsupported Protocol Buffer wire type ${wire}.`);
    const list = fields.get(field) ?? [];
    list.push(value);
    fields.set(field, list);
  }
  return fields;
 }
 function firstBytes(
  fields: Map<number, Array<bigint | Uint8Array>>,
  number: number,
 ): Uint8Array | undefined {
  const value = fields.get(number)?.[0];
  return value instanceof Uint8Array ? value : undefined;
 }
 function firstInt(
  fields: Map<number, Array<bigint | Uint8Array>>,
  number: number,
  fallback = 0n,
 ): bigint {
  const value = fields.get(number)?.[0];
  return typeof value === "bigint" ? value : fallback;
 }
 function parseMigrationParameter(
  bytes: Uint8Array,
  warnings: string[],
 ): OtpProfile {
  const fields = readProto(bytes);
  const secret = firstBytes(fields, 1);
  if (!secret?.length)
    throw new Error("Google migration credential has no secret.");
  const name = firstBytes(fields, 2)
    ? utf8(firstBytes(fields, 2)!)
    : "Imported account";
  const issuer = firstBytes(fields, 3) ? utf8(firstBytes(fields, 3)!) : "";
  const algorithms: Record<string, OtpHashAlgorithm> = {
    "0": "SHA-1",
    "1": "SHA-1",
    "2": "SHA-256",
    "3": "SHA-512",
  };
  const algorithmCode = firstInt(fields, 4).toString();
  const algorithm = algorithms[algorithmCode];
  if (!algorithm)
    throw new Error(`Unsupported Google migration hash code ${algorithmCode}.`);
  const digitCode = Number(firstInt(fields, 5, 1n));
  const digits = digitCode === 2 ? 8 : 6;
  if (digitCode !== 0 && digitCode !== 1 && digitCode !== 2)
    warnings.push(`Unknown digit code ${digitCode}; interpreted as 6 digits.`);
  const typeCode = Number(firstInt(fields, 6, 2n));
  if (typeCode !== 1 && typeCode !== 2)
    throw new Error(`Unsupported Google migration OTP type ${typeCode}.`);
  return {
    kind: typeCode === 1 ? "hotp" : "totp",
    secret,
    issuer,
    account: name,
    algorithm,
    digits,
    period: 30,
    counter: firstInt(fields, 7),
    extensions: new Map(),
  };
 }
 function decodeStandardBase64(input: string): Uint8Array {
  const normalized = input
    .replaceAll(" ", "+")
    .replaceAll("-", "+")
    .replaceAll("_", "/");
  if (!/^[A-Za-z0-9+/]*={0,2}$/u.test(normalized))
    throw new Error("Migration data is not valid Base64.");
  try {
    return Uint8Array.from(
      atob(normalized.padEnd(Math.ceil(normalized.length / 4) * 4, "=")),
      (value) => value.charCodeAt(0),
    );
  } catch {
    throw new Error("Migration data is not valid Base64.");
  }
 }
 export function importGoogleMigration(input: string): ImportResult {
  if (input.length > MAX_IMPORT_BYTES * 2)
    throw new Error("Migration URI is too large.");
  const url = new URL(input);
  if (url.protocol !== "otpauth-migration:" || url.hostname !== "offline")
    throw new Error("Expected an otpauth-migration://offline URI.");
  const data = url.searchParams.get("data");
  if (!data) throw new Error("Migration URI has no data parameter.");
  const payload = decodeStandardBase64(data);
  if (payload.byteLength > MAX_IMPORT_BYTES)
    throw new Error("Migration payload is too large.");
  const fields = readProto(payload);
  const warnings: string[] = [];
  const version = firstInt(fields, 2, 1n);
  if (version !== 1n)
    warnings.push(
      `Migration payload version ${version.toString()} is not documented by this importer.`,
    );
  const batchSize = firstInt(fields, 3, 1n);
  if (batchSize > 1n)
    warnings.push(
      `This is one part of a ${batchSize.toString()}-QR migration batch; import all parts.`,
    );
  const parameters = fields.get(1) ?? [];
  const profiles = parameters.map((value) => {
    if (!(value instanceof Uint8Array))
      throw new Error("Migration credential has an invalid wire type.");
    return parseMigrationParameter(value, warnings);
  });
  if (!profiles.length)
    throw new Error("Migration payload contains no OTP credentials.");
  return { profiles, warnings };
 }
 function csvRows(input: string): string[][] {
  if (input.length > MAX_IMPORT_BYTES)
    throw new Error("CSV input is too large.");
  const rows: string[][] = [];
  let row: string[] = [];
  let field = "";
  let quoted = false;
  for (let index = 0; index < input.length; index += 1) {
    const character = input[index]!;
    if (quoted) {
      if (character === '"' && input[index + 1] === '"') {
        field += '"';
        index += 1;
      } else if (character === '"') quoted = false;
      else field += character;
    } else if (character === '"' && field === "") quoted = true;
    else if (character === ",") {
      row.push(field);
      field = "";
    } else if (character === "\n") {
      row.push(field.replace(/\r$/u, ""));
      rows.push(row);
      row = [];
      field = "";
    } else field += character;
  }
  if (quoted) throw new Error("CSV contains an unterminated quoted field.");
  if (field || row.length) {
    row.push(field);
    rows.push(row);
  }
  return rows.filter((item) => item.some(Boolean));
 }
 export function importCsv(input: string): ImportResult {
  const rows = csvRows(input);
  const header = rows.shift()?.map((value) => value.trim().toLowerCase());
  if (!header) throw new Error("CSV is empty.");
  const find = (name: string): number => header.indexOf(name);
  for (const required of ["type", "account", "secret"])
    if (find(required) < 0)
      throw new Error(`CSV requires a ${required} column.`);
  const warnings: string[] = [];
  const profiles = rows.map((row, rowIndex): OtpProfile => {
    const get = (name: string): string => row[find(name)]?.trim() ?? "";
    const unprotect = (value: string): string =>
      /^'[=+\-@\t\r]/u.test(value) ? value.slice(1) : value;
    const kind = get("type").toLowerCase();
    if (kind !== "totp" && kind !== "hotp")
      throw new Error(`CSV row ${rowIndex + 2} has an invalid type.`);
    const algorithmText =
      get("algorithm").toUpperCase().replace("-", "") || "SHA1";
    const algorithm = (
      { SHA1: "SHA-1", SHA256: "SHA-256", SHA512: "SHA-512" } as Record<
        string,
        OtpHashAlgorithm | undefined
      >
    )[algorithmText];
    if (!algorithm)
      throw new Error(`CSV row ${rowIndex + 2} has an unsupported algorithm.`);
    const digits = Number(get("digits") || 6);
    const period = Number(get("period") || 30);
    const counterText = get("counter") || "0";
    if (
      !Number.isInteger(digits) ||
      digits < 6 ||
      digits > 10 ||
      !Number.isInteger(period) ||
      period < 1 ||
      !/^\d+$/u.test(counterText)
    )
      throw new Error(
        `CSV row ${rowIndex + 2} contains an invalid numeric field.`,
      );
    const account = unprotect(get("account"));
    const issuer = unprotect(get("issuer"));
    const secret = base32ToBytes(get("secret"), {
      allowPadding: true,
      allowSeparators: true,
    });
    if (!account || !secret.byteLength)
      throw new Error(
        `CSV row ${rowIndex + 2} requires an account and non-empty secret.`,
      );
    if (secret.byteLength > 1024)
      throw new Error(`CSV row ${rowIndex + 2} secret is too large.`);
    return {
      kind,
      account,
      issuer,
      secret,
      algorithm,
      digits,
      period,
      counter: BigInt(counterText),
      extensions: new Map(),
    };
  });
  if (!profiles.length)
    warnings.push("CSV contains a header but no credentials.");
  return { profiles, warnings };
 }
 function csvField(value: string): string {
  const protectedValue = /^[=+\-@\t\r]/u.test(value) ? `'${value}` : value;
  return /[",\r\n]/u.test(protectedValue)
    ? `"${protectedValue.replaceAll('"', '""')}"`
    : protectedValue;
 }
 export function exportCsv(profiles: readonly OtpProfile[]): string {
  const rows = [
    [
      "type",
      "account",
      "issuer",
      "secret",
      "algorithm",
      "digits",
      "period",
      "counter",
    ],
  ];
  for (const profile of profiles)
    rows.push([
      profile.kind,
      profile.account,
      profile.issuer,
      bytesToBase32(profile.secret),
      profile.algorithm,
      String(profile.digits),
      String(profile.period),
      String(profile.counter),
    ]);
  return `${rows.map((row) => row.map(csvField).join(",")).join("\r\n")}\r\n`;
 }
 export function importOtpAuthList(input: string): ImportResult {
  if (input.length > MAX_IMPORT_BYTES)
    throw new Error("Provisioning list is too large.");
  const warnings: string[] = [];
  const profiles = input
    .split(/\r?\n/gu)
    .map((line) => line.trim())
    .filter(Boolean)
    .map((line, index) => {
      try {
        const parsed = parseOtpAuth(line);
        warnings.push(
          ...parsed.warnings.map(
            (warning) => `Line ${index + 1}: ${warning.message}`,
          ),
        );
        return parsed.profile;
      } catch (error) {
        throw new Error(
          `Line ${index + 1}: ${error instanceof Error ? error.message : "Invalid provisioning URI."}`,
          { cause: error },
        );
      }
    });
  return { profiles, warnings };
 }
 export function exportOtpAuthList(profiles: readonly OtpProfile[]): string {
  return `${profiles.map(serializeOtpAuth).join("\n")}\n`;
 }
 function localName(element: Element, name: string): Element | undefined {
  return [...element.getElementsByTagNameNS("*", name)][0];
 }
 export function importPlainPskc(input: string): ImportResult {
  if (input.length > MAX_IMPORT_BYTES)
    throw new Error("PSKC input is too large.");
  const document = new DOMParser().parseFromString(input, "application/xml");
  if (document.querySelector("parsererror"))
    throw new Error("PSKC is not well-formed XML.");
  const packages = [...document.getElementsByTagNameNS("*", "KeyPackage")];
  const warnings: string[] = [];
  const profiles = packages.map((keyPackage, index): OtpProfile => {
    if (localName(keyPackage, "EncryptedValue"))
      throw new Error(
        `PSKC key ${index + 1} is encrypted; decrypt it in its source system first.`,
      );
    const plain = localName(keyPackage, "PlainValue")?.textContent?.trim();
    if (!plain) throw new Error(`PSKC key ${index + 1} has no plain secret.`);
    const secret = decodeStandardBase64(plain);
    if (!secret.byteLength || secret.byteLength > 1024)
      throw new Error(`PSKC key ${index + 1} secret length is invalid.`);
    const key = localName(keyPackage, "Key");
    const algorithmUri = key?.getAttribute("Algorithm") ?? "";
    const kind = /hotp/iu.test(algorithmUri)
      ? "hotp"
      : /totp/iu.test(algorithmUri)
        ? "totp"
        : null;
    if (!kind)
      throw new Error(
        `PSKC key ${index + 1} does not declare a supported HOTP/TOTP algorithm.`,
      );
    const responseFormat = localName(keyPackage, "ResponseFormat");
    const digits = Number(responseFormat?.getAttribute("Length") ?? 6);
    const account =
      localName(keyPackage, "FriendlyName")?.textContent?.trim() ||
      key?.getAttribute("Id") ||
      `PSKC key ${index + 1}`;
    const issuer = localName(keyPackage, "Issuer")?.textContent?.trim() ?? "";
    const counterText =
      localName(keyPackage, "Counter")?.textContent?.trim() ?? "0";
    const periodText =
      localName(keyPackage, "TimeInterval")?.textContent?.trim() ?? "30";
    if (
      !/^\d+$/u.test(counterText) ||
      !/^\d+$/u.test(periodText) ||
      !Number.isInteger(digits) ||
      digits < 6 ||
      digits > 10 ||
      Number(periodText) < 1 ||
      Number(periodText) > 86_400 ||
      BigInt(counterText) > (1n << 64n) - 1n
    )
      throw new Error(`PSKC key ${index + 1} has invalid moving-factor data.`);
    if (!/sha1/iu.test(algorithmUri) && algorithmUri)
      warnings.push(
        `PSKC key ${index + 1}: algorithm URI is not a recognized HOTP/TOTP SHA-1 profile.`,
      );
    return {
      kind,
      secret,
      issuer,
      account,
      algorithm: "SHA-1",
      digits,
      period: Number(periodText),
      counter: BigInt(counterText),
      extensions: new Map(),
    };
  });
  if (!profiles.length)
    throw new Error("PSKC contains no KeyPackage elements.");
  return { profiles, warnings };
 }
@@ -0,0 +1,249 @@
 import {
  bytesToArrayBuffer,
  bytesToHex,
  hexToBytes,
  utf8ToBytes,
 } from "../crypto/encoding";
 import type { OtpHashAlgorithm } from "./otp";
 export interface OcraSuite {
  source: string;
  algorithm: OtpHashAlgorithm;
  digits: number;
  counter: boolean;
  questionFormat: "numeric" | "alphanumeric" | "hexadecimal";
  questionLength: number;
  passwordAlgorithm?: OtpHashAlgorithm;
  sessionLength?: number;
  timeStepSeconds?: number;
 }
 export interface OcraInput {
  suite: string | OcraSuite;
  secret: Uint8Array;
  question: string;
  counter?: bigint;
  passwordHash?: Uint8Array;
  session?: Uint8Array;
  timestamp?: number;
  timeStep?: bigint;
 }
 const HASH_NAMES: Record<string, OtpHashAlgorithm | undefined> = {
  SHA1: "SHA-1",
  SHA256: "SHA-256",
  SHA512: "SHA-512",
 };
 const HASH_LENGTHS: Record<OtpHashAlgorithm, number> = {
  "SHA-1": 20,
  "SHA-256": 32,
  "SHA-512": 64,
 };
 function parseQuestion(
  token: string,
 ): Pick<OcraSuite, "questionFormat" | "questionLength"> {
  const match = /^Q([ANH])(\d{1,2})$/u.exec(token);
  if (!match)
    throw new Error("OCRA DataInput must contain a QFxx challenge descriptor.");
  const length = Number(match[2]);
  if (length < 4 || length > 64)
    throw new Error("OCRA challenge length must be between 4 and 64.");
  const format = (
    { A: "alphanumeric", N: "numeric", H: "hexadecimal" } as const
  )[match[1] as "A" | "N" | "H"];
  return { questionFormat: format, questionLength: length };
 }
 export function parseOcraSuite(input: string): OcraSuite {
  if (input.length > 256 || input.trim() !== input)
    throw new Error("OCRA suite is malformed or too long.");
  const parts = input.split(":");
  if (parts.length !== 3 || parts[0] !== "OCRA-1")
    throw new Error("Only the OCRA-1 suite version is supported.");
  const cryptoMatch = /^HOTP-(SHA1|SHA256|SHA512)-(0|[4-9]|10)$/u.exec(
    parts[1]!,
  );
  if (!cryptoMatch)
    throw new Error(
      "OCRA CryptoFunction must be HOTP-SHA1/SHA256/SHA512 with 0 or 4–10 digits.",
    );
  const algorithm = HASH_NAMES[cryptoMatch[1]!]!;
  const digits = Number(cryptoMatch[2]);
  const tokens = parts[2]!.split("-");
  let index = 0;
  const counter = tokens[index] === "C";
  if (counter) index += 1;
  const question = parseQuestion(tokens[index] ?? "");
  index += 1;
  let passwordAlgorithm: OtpHashAlgorithm | undefined;
  let sessionLength: number | undefined;
  let timeStepSeconds: number | undefined;
  for (; index < tokens.length; index += 1) {
    const token = tokens[index]!;
    if (token.startsWith("P")) {
      if (
        passwordAlgorithm ||
        sessionLength !== undefined ||
        timeStepSeconds !== undefined
      )
        throw new Error("OCRA password input is duplicated or out of order.");
      passwordAlgorithm = HASH_NAMES[token.slice(1)];
      if (!passwordAlgorithm)
        throw new Error("OCRA password hash must be SHA1, SHA256 or SHA512.");
    } else if (token.startsWith("S")) {
      if (
        sessionLength !== undefined ||
        timeStepSeconds !== undefined ||
        !/^S\d{3}$/u.test(token)
      )
        throw new Error("OCRA session input is duplicated or out of order.");
      sessionLength = Number(token.slice(1));
      if (sessionLength < 1 || sessionLength > 512)
        throw new Error("OCRA session length must be between 1 and 512 bytes.");
    } else if (token.startsWith("T")) {
      if (timeStepSeconds !== undefined)
        throw new Error("OCRA timestamp input is duplicated.");
      const timeMatch = /^T(\d{1,2})([SMH])$/u.exec(token);
      if (!timeMatch)
        throw new Error("OCRA timestamp must use seconds, minutes or hours.");
      const amount = Number(timeMatch[1]);
      const unit = timeMatch[2]!;
      if ((unit === "S" || unit === "M") && (amount < 1 || amount > 59))
        throw new Error("OCRA second/minute steps must be between 1 and 59.");
      if (unit === "H" && (amount < 1 || amount > 48))
        throw new Error("OCRA hour steps must be between 1 and 48.");
      timeStepSeconds = amount * (unit === "S" ? 1 : unit === "M" ? 60 : 3600);
    } else throw new Error(`Unsupported OCRA DataInput token ${token}.`);
  }
  return {
    source: input,
    algorithm,
    digits,
    counter,
    ...question,
    ...(passwordAlgorithm ? { passwordAlgorithm } : {}),
    ...(sessionLength !== undefined ? { sessionLength } : {}),
    ...(timeStepSeconds !== undefined ? { timeStepSeconds } : {}),
  };
 }
 function unsigned64(value: bigint, name: string): Uint8Array {
  if (value < 0n || value > (1n << 64n) - 1n)
    throw new Error(`${name} must be an unsigned 64-bit integer.`);
  const bytes = new Uint8Array(8);
  for (let index = 7; index >= 0; index -= 1) {
    bytes[index] = Number(value & 0xffn);
    value >>= 8n;
  }
  return bytes;
 }
 function questionBytes(suite: OcraSuite, question: string): Uint8Array {
  if (question.length === 0 || question.length > suite.questionLength)
    throw new Error(
      `OCRA question must contain 1–${suite.questionLength} ${suite.questionFormat} characters.`,
    );
  if (suite.questionFormat === "numeric") {
    if (!/^\d+$/u.test(question))
      throw new Error("OCRA numeric question contains a non-digit.");
    return hexToBytes(BigInt(question).toString(16).padEnd(256, "0"));
  }
  if (suite.questionFormat === "hexadecimal") {
    if (!/^[0-9a-f]+$/iu.test(question))
      throw new Error(
        "OCRA hexadecimal question contains an invalid character.",
      );
    return hexToBytes(question.padEnd(256, "0"));
  }
  if (!/^[A-Za-z0-9]+$/u.test(question))
    throw new Error("OCRA alphanumeric questions use only A–Z, a–z and 0–9.");
  return utf8ToBytes(question);
 }
 export async function hashOcraPassword(
  password: string,
  algorithm: OtpHashAlgorithm,
 ): Promise<Uint8Array> {
  if (password.length > 4096)
    throw new Error("OCRA password input is too large.");
  return new Uint8Array(
    await crypto.subtle.digest(
      algorithm,
      bytesToArrayBuffer(utf8ToBytes(password)),
    ),
  );
 }
 export async function ocra(input: OcraInput): Promise<string> {
  const suite =
    typeof input.suite === "string" ? parseOcraSuite(input.suite) : input.suite;
  if (!input.secret.byteLength || input.secret.byteLength > 1024)
    throw new Error("An OCRA secret is required.");
  const pieces: Uint8Array[] = [utf8ToBytes(suite.source), Uint8Array.of(0)];
  if (suite.counter) {
    if (input.counter === undefined)
      throw new Error("This OCRA suite requires a counter.");
    pieces.push(unsigned64(input.counter, "OCRA counter"));
  }
  const question = questionBytes(suite, input.question);
  if (question.byteLength > 128)
    throw new Error("OCRA question encoding exceeds 128 bytes.");
  const paddedQuestion = new Uint8Array(128);
  paddedQuestion.set(question);
  pieces.push(paddedQuestion);
  if (suite.passwordAlgorithm) {
    if (!input.passwordHash)
      throw new Error("This OCRA suite requires a pre-hashed password/PIN.");
    if (input.passwordHash.byteLength !== HASH_LENGTHS[suite.passwordAlgorithm])
      throw new Error(
        `OCRA ${suite.passwordAlgorithm} password hash has the wrong length.`,
      );
    pieces.push(input.passwordHash);
  }
  if (suite.sessionLength !== undefined) {
    if (!input.session)
      throw new Error("This OCRA suite requires session data.");
    if (input.session.byteLength > suite.sessionLength)
      throw new Error("OCRA session data exceeds the suite length.");
    const session = new Uint8Array(suite.sessionLength);
    session.set(input.session, suite.sessionLength - input.session.byteLength);
    pieces.push(session);
  }
  if (suite.timeStepSeconds !== undefined) {
    const timeStep =
      input.timeStep ??
      BigInt(
        Math.floor(
          (input.timestamp ?? Date.now() / 1000) / suite.timeStepSeconds,
        ),
      );
    pieces.push(unsigned64(timeStep, "OCRA time step"));
  }
  const length = pieces.reduce((sum, piece) => sum + piece.byteLength, 0);
  const data = new Uint8Array(length);
  let offset = 0;
  for (const piece of pieces) {
    data.set(piece, offset);
    offset += piece.byteLength;
  }
  const key = await crypto.subtle.importKey(
    "raw",
    bytesToArrayBuffer(input.secret),
    { name: "HMAC", hash: suite.algorithm },
    false,
    ["sign"],
  );
  const digest = new Uint8Array(
    await crypto.subtle.sign("HMAC", key, bytesToArrayBuffer(data)),
  );
  if (suite.digits === 0) return bytesToHex(digest);
  const truncationOffset = digest.at(-1)! & 0x0f;
  const binary =
    ((digest[truncationOffset]! & 0x7f) << 24) |
    ((digest[truncationOffset + 1]! & 0xff) << 16) |
    ((digest[truncationOffset + 2]! & 0xff) << 8) |
    (digest[truncationOffset + 3]! & 0xff);
  return (binary % 10 ** suite.digits).toString().padStart(suite.digits, "0");
 }
@@ -0,0 +1,165 @@
 import { bytesToArrayBuffer } from "../crypto/encoding";
 export type OtpHashAlgorithm = "SHA-1" | "SHA-256" | "SHA-512";
 export type OtpKind = "hotp" | "totp";
 export interface HotpOptions {
  secret: Uint8Array;
  counter: bigint;
  digits?: number;
  algorithm?: OtpHashAlgorithm;
 }
 export interface TotpOptions extends Omit<HotpOptions, "counter"> {
  timestamp?: number;
  period?: number;
  epoch?: number;
 }
 export interface OtpMatch {
  code: string;
  counter: bigint;
  delta: number;
 }
 export const MAX_HOTP_COUNTER = (1n << 64n) - 1n;
 function validateSecret(secret: Uint8Array): void {
  if (
    !ArrayBuffer.isView(secret) ||
    secret.BYTES_PER_ELEMENT !== 1 ||
    secret.byteLength === 0
  ) {
    throw new TypeError("An OTP secret is required.");
  }
  if (secret.byteLength > 1024)
    throw new RangeError("OTP secret is too large.");
 }
 function validateDigits(digits: number): void {
  if (!Number.isInteger(digits) || digits < 6 || digits > 10) {
    throw new RangeError("OTP digits must be an integer between 6 and 10.");
  }
 }
 function counterBytes(counter: bigint): Uint8Array {
  if (counter < 0n || counter > MAX_HOTP_COUNTER) {
    throw new RangeError("HOTP counter must be an unsigned 64-bit value.");
  }
  const output = new Uint8Array(8);
  let remaining = counter;
  for (let index = 7; index >= 0; index -= 1) {
    output[index] = Number(remaining & 0xffn);
    remaining >>= 8n;
  }
  return output;
 }
 export async function hotp(options: HotpOptions): Promise<string> {
  validateSecret(options.secret);
  const digits = options.digits ?? 6;
  const algorithm = options.algorithm ?? "SHA-1";
  validateDigits(digits);
  const key = await crypto.subtle.importKey(
    "raw",
    bytesToArrayBuffer(options.secret),
    { name: "HMAC", hash: algorithm },
    false,
    ["sign"],
  );
  const digest = new Uint8Array(
    await crypto.subtle.sign(
      "HMAC",
      key,
      bytesToArrayBuffer(counterBytes(options.counter)),
    ),
  );
  const offset = (digest.at(-1) ?? 0) & 0x0f;
  if (offset + 3 >= digest.length) throw new Error("HMAC result is too short.");
  const binary =
    ((digest[offset]! & 0x7f) << 24) |
    ((digest[offset + 1]! & 0xff) << 16) |
    ((digest[offset + 2]! & 0xff) << 8) |
    (digest[offset + 3]! & 0xff);
  return (binary % 10 ** digits).toString().padStart(digits, "0");
 }
 export function totpCounter(timestamp: number, period = 30, epoch = 0): bigint {
  if (!Number.isFinite(timestamp) || timestamp < 0) {
    throw new RangeError("TOTP timestamp must be a non-negative Unix time.");
  }
  if (!Number.isInteger(period) || period < 1 || period > 86_400) {
    throw new RangeError("TOTP period must be between 1 and 86400 seconds.");
  }
  if (!Number.isFinite(epoch) || epoch < 0 || epoch > timestamp) {
    throw new RangeError("TOTP epoch must not exceed the timestamp.");
  }
  return BigInt(Math.floor((timestamp - epoch) / period));
 }
 export async function totp(options: TotpOptions): Promise<string> {
  const timestamp = options.timestamp ?? Date.now() / 1000;
  return hotp({
    secret: options.secret,
    counter: totpCounter(timestamp, options.period, options.epoch),
    digits: options.digits,
    algorithm: options.algorithm,
  });
 }
 function normalizeCode(code: string, digits: number): string | null {
  const normalized = code.replace(/[\s-]/gu, "");
  return new RegExp(`^[0-9]{${digits}}$`, "u").test(normalized)
    ? normalized
    : null;
 }
 export async function verifyTotp(
  code: string,
  options: TotpOptions & { window?: number },
 ): Promise<OtpMatch | null> {
  const digits = options.digits ?? 6;
  validateDigits(digits);
  const normalized = normalizeCode(code, digits);
  if (!normalized) return null;
  const window = options.window ?? 1;
  if (!Number.isInteger(window) || window < 0 || window > 100) {
    throw new RangeError("Diagnostic TOTP window must be between 0 and 100.");
  }
  const baseCounter = totpCounter(
    options.timestamp ?? Date.now() / 1000,
    options.period,
    options.epoch,
  );
  for (let distance = 0; distance <= window; distance += 1) {
    const deltas = distance === 0 ? [0] : [-distance, distance];
    for (const delta of deltas) {
      const counter = baseCounter + BigInt(delta);
      if (counter < 0n) continue;
      const candidate = await hotp({ ...options, counter, digits });
      if (candidate === normalized) return { code: candidate, counter, delta };
    }
  }
  return null;
 }
 export async function verifyHotp(
  code: string,
  options: HotpOptions & { lookAhead?: number },
 ): Promise<OtpMatch | null> {
  const digits = options.digits ?? 6;
  validateDigits(digits);
  const normalized = normalizeCode(code, digits);
  if (!normalized) return null;
  const lookAhead = options.lookAhead ?? 10;
  if (!Number.isInteger(lookAhead) || lookAhead < 0 || lookAhead > 10_000) {
    throw new RangeError("HOTP look-ahead must be between 0 and 10000.");
  }
  for (let delta = 0; delta <= lookAhead; delta += 1) {
    const counter = options.counter + BigInt(delta);
    if (counter > MAX_HOTP_COUNTER) break;
    const candidate = await hotp({ ...options, counter, digits });
    if (candidate === normalized) return { code: candidate, counter, delta };
  }
  return null;
 }
@@ -0,0 +1,262 @@
 import { base32ToBytes, bytesToBase32 } from "../crypto/encoding";
 import type { OtpHashAlgorithm, OtpKind } from "./otp";
 export interface OtpProfile {
  kind: OtpKind;
  secret: Uint8Array;
  issuer: string;
  account: string;
  algorithm: OtpHashAlgorithm;
  digits: number;
  period: number;
  counter: bigint;
  extensions: ReadonlyMap<string, string>;
 }
 export interface OtpProfileWarning {
  code:
    | "issuer-mismatch"
    | "short-secret"
    | "nonstandard-digits"
    | "nonstandard-period"
    | "extension";
  message: string;
 }
 const HASH_FROM_URI: Record<string, OtpHashAlgorithm> = {
  SHA1: "SHA-1",
  SHA256: "SHA-256",
  SHA512: "SHA-512",
 };
 export interface ParsedOtpAuth {
  profile: OtpProfile;
  warnings: OtpProfileWarning[];
 }
 function decodeComponent(value: string, field: string): string {
  try {
    return decodeURIComponent(value);
  } catch {
    throw new Error(`${field} contains invalid percent encoding.`);
  }
 }
 function integerParameter(
  value: string | undefined,
  fallback: string,
  name: string,
 ): number {
  const text = value ?? fallback;
  if (!/^\d+$/u.test(text))
    throw new Error(`${name} must be an unsigned integer.`);
  return Number(text);
 }
 function hasUnsafeLabelCharacter(value: string): boolean {
  return [...value].some((character) => {
    const code = character.codePointAt(0)!;
    return character === ":" || code <= 31 || code === 127;
  });
 }
 export function parseOtpAuth(input: string): ParsedOtpAuth {
  if (input.length > 16_384) throw new Error("Provisioning URI is too large.");
  let url: URL;
  try {
    url = new URL(input);
  } catch {
    throw new Error("Provisioning input is not a valid URI.");
  }
  if (url.protocol.toLowerCase() !== "otpauth:") {
    throw new Error("Expected an otpauth:// provisioning URI.");
  }
  const kind = url.hostname.toLowerCase();
  if (kind !== "hotp" && kind !== "totp") {
    throw new Error("OTP type must be HOTP or TOTP.");
  }
  const parameters = new Map<string, string>();
  for (const [rawName, value] of url.searchParams) {
    const name = rawName.toLowerCase();
    if (parameters.has(name)) throw new Error(`Duplicate ${name} parameter.`);
    parameters.set(name, value);
  }
  const secretText = parameters.get("secret");
  if (!secretText)
    throw new Error("Provisioning URI does not contain a secret.");
  const secret = base32ToBytes(secretText, {
    allowPadding: true,
    allowSeparators: false,
  });
  if (secret.byteLength === 0) throw new Error("OTP secret is empty.");
  const rawLabel = url.pathname.replace(/^\//u, "");
  if (!rawLabel)
    throw new Error("Provisioning URI does not contain an account label.");
  const separator = /:|%3a/iu.exec(rawLabel);
  const issuerLabel = separator
    ? decodeComponent(rawLabel.slice(0, separator.index), "Issuer label")
    : "";
  const account = decodeComponent(
    separator
      ? rawLabel
          .slice(separator.index + separator[0].length)
          .replace(/^(?:%20)+/iu, "")
      : rawLabel,
    "Account label",
  );
  if (!account) throw new Error("Provisioning account label is empty.");
  if (issuerLabel.includes(":") || account.includes(":")) {
    throw new Error("Issuer and account labels must not contain a colon.");
  }
  const issuer = parameters.get("issuer") ?? issuerLabel;
  const algorithmText = (parameters.get("algorithm") ?? "SHA1").toUpperCase();
  const algorithm = HASH_FROM_URI[algorithmText];
  if (!algorithm)
    throw new Error(`Unsupported OTP algorithm: ${algorithmText}.`);
  const digits = integerParameter(parameters.get("digits"), "6", "OTP digits");
  if (!Number.isInteger(digits) || digits < 6 || digits > 10) {
    throw new Error("OTP digits must be between 6 and 10.");
  }
  const period = integerParameter(
    parameters.get("period"),
    "30",
    "TOTP period",
  );
  if (!Number.isInteger(period) || period < 1 || period > 86_400) {
    throw new Error("TOTP period is outside the supported range.");
  }
  const counterText = parameters.get("counter");
  if (kind === "hotp" && counterText === undefined) {
    throw new Error("HOTP provisioning requires a counter.");
  }
  if (counterText !== undefined && !/^\d+$/u.test(counterText)) {
    throw new Error("HOTP counter must be an unsigned integer.");
  }
  const counter = BigInt(counterText ?? "0");
  if (counter > (1n << 64n) - 1n)
    throw new Error("HOTP counter exceeds 64 bits.");
  const known = new Set([
    "secret",
    "issuer",
    "algorithm",
    "digits",
    "period",
    "counter",
  ]);
  const extensions = new Map(
    [...parameters].filter(([name]) => !known.has(name)),
  );
  const warnings: OtpProfileWarning[] = [];
  if (
    issuerLabel &&
    parameters.get("issuer") &&
    issuerLabel !== parameters.get("issuer")
  ) {
    warnings.push({
      code: "issuer-mismatch",
      message:
        "The display issuer and issuer parameter differ; verify the intended service.",
    });
  }
  if (secret.byteLength < 16) {
    warnings.push({
      code: "short-secret",
      message: "The secret is shorter than the 128-bit HOTP minimum.",
    });
  }
  if (digits !== 6 && digits !== 8) {
    warnings.push({
      code: "nonstandard-digits",
      message: "Many authenticator applications support only 6 or 8 digits.",
    });
  }
  if (kind === "totp" && period !== 30) {
    warnings.push({
      code: "nonstandard-period",
      message: "Some authenticator applications ignore non-default periods.",
    });
  }
  for (const name of extensions.keys()) {
    warnings.push({
      code: "extension",
      message: `Unknown parameter preserved: ${name}.`,
    });
  }
  return {
    profile: {
      kind,
      secret,
      issuer,
      account,
      algorithm,
      digits,
      period,
      counter,
      extensions,
    },
    warnings,
  };
 }
 function uriHash(algorithm: OtpHashAlgorithm): string {
  return algorithm.replace("-", "");
 }
 export function serializeOtpAuth(profile: OtpProfile): string {
  if (!profile.account.trim()) throw new Error("An account label is required.");
  const issuer = profile.issuer.trim();
  if (
    hasUnsafeLabelCharacter(issuer) ||
    hasUnsafeLabelCharacter(profile.account)
  ) {
    throw new Error(
      "Issuer and account labels must not contain colons or control characters.",
    );
  }
  const label = issuer
    ? `${issuer}:${profile.account.trim()}`
    : profile.account.trim();
  const parameters = new URLSearchParams();
  parameters.set("secret", bytesToBase32(profile.secret));
  if (issuer) parameters.set("issuer", issuer);
  parameters.set("algorithm", uriHash(profile.algorithm));
  parameters.set("digits", profile.digits.toString());
  if (profile.kind === "totp")
    parameters.set("period", profile.period.toString());
  else parameters.set("counter", profile.counter.toString());
  for (const [name, value] of profile.extensions) {
    if (!parameters.has(name)) parameters.set(name, value);
  }
  const encodedLabel = label
    .split(":")
    .map((part) => encodeURIComponent(part))
    .join(":");
  return `otpauth://${profile.kind}/${encodedLabel}?${parameters.toString()}`;
 }
 export function profileStrength(profile: OtpProfile): {
  secretBits: number;
  findings: string[];
 } {
  const secretBits = profile.secret.byteLength * 8;
  const findings: string[] = [];
  if (secretBits < 128)
    findings.push("Secret is below the HOTP 128-bit minimum.");
  else if (secretBits < 160)
    findings.push(
      "Secret meets the minimum but not the 160-bit recommendation.",
    );
  if (profile.kind === "hotp" && profile.algorithm !== "SHA-1") {
    findings.push(
      "HOTP RFC 4226 specifies HMAC-SHA-1; other hashes may not interoperate.",
    );
  }
  if (profile.kind === "totp" && profile.period !== 30) {
    findings.push("Non-default periods are frequently ignored by importers.");
  }
  if (findings.length === 0)
    findings.push("No structural interoperability issue detected.");
  return { secretBits, findings };
 }
@@ -0,0 +1,378 @@
 /*
 * QR construction follows Kazuhiko Arase's QRCode for JavaScript algorithm
 * (MIT License, copyright 2009 Kazuhiko Arase), rewritten in TypeScript for
 * a bounded browser-only byte-mode encoder. See THIRD_PARTY_NOTICES.md.
 */
 interface RsBlock {
  total: number;
  data: number;
 }
 // Error correction M, versions 1–10. Each group is count,total,data.
 const RS_M = [
  [1, 26, 16],
  [1, 44, 28],
  [1, 70, 44],
  [2, 50, 32],
  [2, 67, 43],
  [4, 43, 27],
  [4, 49, 31],
  [2, 60, 38, 2, 61, 39],
  [3, 58, 36, 2, 59, 37],
  [4, 69, 43, 1, 70, 44],
 ] as const;
 const PATTERNS = [
  [],
  [6, 18],
  [6, 22],
  [6, 26],
  [6, 30],
  [6, 34],
  [6, 22, 38],
  [6, 24, 42],
  [6, 26, 46],
  [6, 28, 50],
 ] as const;
 class Bits {
  readonly bytes: number[] = [];
  length = 0;
  put(value: number, length: number): void {
    for (let shift = length - 1; shift >= 0; shift -= 1)
      this.bit(Boolean((value >>> shift) & 1));
  }
  bit(value: boolean): void {
    const index = Math.floor(this.length / 8);
    if (this.bytes.length <= index) this.bytes.push(0);
    if (value)
      this.bytes[index] = this.bytes[index]! | (0x80 >>> (this.length % 8));
    this.length += 1;
  }
 }
 const EXP = new Uint8Array(512);
 const LOG = new Uint8Array(256);
 for (let index = 0, value = 1; index < 255; index += 1) {
  EXP[index] = value;
  LOG[value] = index;
  value <<= 1;
  if (value & 0x100) value ^= 0x11d;
 }
 for (let index = 255; index < EXP.length; index += 1)
  EXP[index] = EXP[index - 255]!;
 function multiplyPoly(left: number[], right: number[]): number[] {
  const output = Array.from(
    { length: left.length + right.length - 1 },
    () => 0,
  );
  for (let leftIndex = 0; leftIndex < left.length; leftIndex += 1) {
    for (let rightIndex = 0; rightIndex < right.length; rightIndex += 1) {
      const a = left[leftIndex]!;
      const b = right[rightIndex]!;
      if (a && b)
        output[leftIndex + rightIndex] =
          output[leftIndex + rightIndex]! ^ EXP[LOG[a]! + LOG[b]!]!;
    }
  }
  return output;
 }
 function errorCorrection(data: number[], count: number): number[] {
  let divisor = [1];
  for (let index = 0; index < count; index += 1)
    divisor = multiplyPoly(divisor, [1, EXP[index]!]);
  const working = [...data, ...Array.from({ length: count }, () => 0)];
  for (let index = 0; index < data.length; index += 1) {
    const lead = working[index]!;
    if (!lead) continue;
    const ratio = LOG[lead]!;
    for (let coefficient = 0; coefficient < divisor.length; coefficient += 1) {
      const value = divisor[coefficient]!;
      if (value)
        working[index + coefficient] =
          working[index + coefficient]! ^ EXP[LOG[value]! + ratio]!;
    }
  }
  return working.slice(data.length);
 }
 function blocks(version: number): RsBlock[] {
  const row = RS_M[version - 1];
  if (!row)
    throw new Error(
      "QR payload requires a version above the supported version 10 limit.",
    );
  const output: RsBlock[] = [];
  for (let index = 0; index < row.length; index += 3) {
    for (let count = 0; count < row[index]!; count += 1)
      output.push({ total: row[index + 1]!, data: row[index + 2]! });
  }
  return output;
 }
 function dataCodewords(payload: Uint8Array, version: number): number[] {
  const structure = blocks(version);
  const capacity = structure.reduce((sum, block) => sum + block.data, 0);
  const bits = new Bits();
  bits.put(4, 4);
  bits.put(payload.byteLength, version < 10 ? 8 : 16);
  for (const byte of payload) bits.put(byte, 8);
  if (bits.length > capacity * 8)
    throw new Error("QR payload does not fit this version.");
  if (bits.length + 4 <= capacity * 8) bits.put(0, 4);
  while (bits.length % 8) bits.bit(false);
  let pad = 0xec;
  while (bits.bytes.length < capacity) {
    bits.put(pad, 8);
    pad = pad === 0xec ? 0x11 : 0xec;
  }
  const dataBlocks: number[][] = [];
  const eccBlocks: number[][] = [];
  let offset = 0;
  for (const block of structure) {
    const data = bits.bytes.slice(offset, offset + block.data);
    offset += block.data;
    dataBlocks.push(data);
    eccBlocks.push(errorCorrection(data, block.total - block.data));
  }
  const output: number[] = [];
  const maxData = Math.max(...dataBlocks.map((block) => block.length));
  const maxEcc = Math.max(...eccBlocks.map((block) => block.length));
  for (let index = 0; index < maxData; index += 1)
    for (const block of dataBlocks)
      if (index < block.length) output.push(block[index]!);
  for (let index = 0; index < maxEcc; index += 1)
    for (const block of eccBlocks)
      if (index < block.length) output.push(block[index]!);
  return output;
 }
 function bchDigit(value: number): number {
  let digits = 0;
  while (value) {
    digits += 1;
    value >>>= 1;
  }
  return digits;
 }
 function bch(value: number, generator: number, shift: number): number {
  let remainder = value << shift;
  while (bchDigit(remainder) >= bchDigit(generator))
    remainder ^= generator << (bchDigit(remainder) - bchDigit(generator));
  return (value << shift) | remainder;
 }
 function mask(pattern: number, row: number, column: number): boolean {
  if (pattern === 0) return (row + column) % 2 === 0;
  if (pattern === 1) return row % 2 === 0;
  if (pattern === 2) return column % 3 === 0;
  if (pattern === 3) return (row + column) % 3 === 0;
  if (pattern === 4)
    return (Math.floor(row / 2) + Math.floor(column / 3)) % 2 === 0;
  if (pattern === 5) return ((row * column) % 2) + ((row * column) % 3) === 0;
  if (pattern === 6)
    return (((row * column) % 2) + ((row * column) % 3)) % 2 === 0;
  return (((row * column) % 3) + ((row + column) % 2)) % 2 === 0;
 }
 type Matrix = Array<Array<boolean | null>>;
 function finder(matrix: Matrix, top: number, left: number): void {
  const size = matrix.length;
  for (let row = -1; row <= 7; row += 1)
    for (let column = -1; column <= 7; column += 1) {
      if (
        top + row < 0 ||
        left + column < 0 ||
        top + row >= size ||
        left + column >= size
      )
        continue;
      matrix[top + row]![left + column] =
        (row >= 0 && row <= 6 && (column === 0 || column === 6)) ||
        (column >= 0 && column <= 6 && (row === 0 || row === 6)) ||
        (row >= 2 && row <= 4 && column >= 2 && column <= 4);
    }
 }
 function setup(version: number, pattern: number, test: boolean): Matrix {
  const size = version * 4 + 17;
  const matrix: Matrix = Array.from({ length: size }, () =>
    Array.from({ length: size }, () => null),
  );
  finder(matrix, 0, 0);
  finder(matrix, size - 7, 0);
  finder(matrix, 0, size - 7);
  const positions = PATTERNS[version - 1]!;
  for (const row of positions)
    for (const column of positions) {
      if (matrix[row]![column] !== null) continue;
      for (let y = -2; y <= 2; y += 1)
        for (let x = -2; x <= 2; x += 1)
          matrix[row + y]![column + x] =
            Math.abs(y) === 2 || Math.abs(x) === 2 || (y === 0 && x === 0);
    }
  for (let index = 8; index < size - 8; index += 1) {
    if (matrix[index]![6] === null) matrix[index]![6] = index % 2 === 0;
    if (matrix[6]![index] === null) matrix[6]![index] = index % 2 === 0;
  }
  const format = bch(pattern, 0x537, 10) ^ 0x5412; // M has format level bits 00.
  for (let index = 0; index < 15; index += 1) {
    const value = !test && Boolean((format >>> index) & 1);
    const verticalRow =
      index < 6 ? index : index < 8 ? index + 1 : size - 15 + index;
    matrix[verticalRow]![8] = value;
    const horizontalColumn =
      index < 8 ? size - index - 1 : index < 9 ? 7 : 15 - index - 1;
    matrix[8]![horizontalColumn] = value;
  }
  matrix[size - 8]![8] = !test;
  if (version >= 7) {
    const versionBits = bch(version, 0x1f25, 12);
    for (let index = 0; index < 18; index += 1) {
      const value = !test && Boolean((versionBits >>> index) & 1);
      matrix[Math.floor(index / 3)]![(index % 3) + size - 11] = value;
      matrix[(index % 3) + size - 11]![Math.floor(index / 3)] = value;
    }
  }
  return matrix;
 }
 function place(
  matrix: Matrix,
  codewords: number[],
  pattern: number,
 ): boolean[][] {
  const size = matrix.length;
  let row = size - 1;
  let direction = -1;
  let byteIndex = 0;
  let bitIndex = 7;
  for (let column = size - 1; column > 0; column -= 2) {
    if (column === 6) column -= 1;
    for (;;) {
      for (let offset = 0; offset < 2; offset += 1)
        if (matrix[row]![column - offset] === null) {
          let dark =
            byteIndex < codewords.length &&
            Boolean((codewords[byteIndex]! >>> bitIndex) & 1);
          if (mask(pattern, row, column - offset)) dark = !dark;
          matrix[row]![column - offset] = dark;
          bitIndex -= 1;
          if (bitIndex < 0) {
            bitIndex = 7;
            byteIndex += 1;
          }
        }
      row += direction;
      if (row < 0 || row >= size) {
        row -= direction;
        direction = -direction;
        break;
      }
    }
  }
  return matrix as boolean[][];
 }
 function penalty(matrix: boolean[][]): number {
  const size = matrix.length;
  let score = 0;
  for (let row = 0; row < size; row += 1)
    for (let column = 0; column < size; column += 1) {
      let same = 0;
      for (let y = -1; y <= 1; y += 1)
        for (let x = -1; x <= 1; x += 1)
          if (
            (x || y) &&
            row + y >= 0 &&
            column + x >= 0 &&
            row + y < size &&
            column + x < size &&
            matrix[row + y]![column + x] === matrix[row]![column]
          )
            same += 1;
      if (same > 5) score += 3 + same - 5;
    }
  for (let row = 0; row < size - 1; row += 1)
    for (let column = 0; column < size - 1; column += 1) {
      const count =
        Number(matrix[row]![column]) +
        Number(matrix[row + 1]![column]) +
        Number(matrix[row]![column + 1]) +
        Number(matrix[row + 1]![column + 1]);
      if (count === 0 || count === 4) score += 3;
    }
  const finderLike = (values: boolean[]): boolean =>
    values[0] === true &&
    values[1] === false &&
    values[2] === true &&
    values[3] === true &&
    values[4] === true &&
    values[5] === false &&
    values[6] === true;
  for (let index = 0; index < size; index += 1)
    for (let offset = 0; offset < size - 6; offset += 1) {
      if (finderLike(matrix[index]!.slice(offset, offset + 7))) score += 40;
      if (
        finderLike(
          Array.from(
            { length: 7 },
            (_, step) => matrix[offset + step]![index]!,
          ),
        )
      )
        score += 40;
    }
  const dark = matrix.flat().filter(Boolean).length;
  return score + (Math.abs((dark * 100) / (size * size) - 50) / 5) * 10;
 }
 export function encodeQr(text: string): boolean[][] {
  const payload = new TextEncoder().encode(text);
  let version = 1;
  for (; version <= 10; version += 1) {
    const capacity =
      blocks(version).reduce((sum, block) => sum + block.data, 0) * 8;
    const required = 4 + (version < 10 ? 8 : 16) + payload.byteLength * 8;
    if (required <= capacity) break;
  }
  if (version > 10)
    throw new Error(
      "Provisioning URI is too large for the built-in QR encoder (maximum version 10). ",
    );
  const codewords = dataCodewords(payload, version);
  let best: boolean[][] | undefined;
  let bestScore = Number.POSITIVE_INFINITY;
  for (let pattern = 0; pattern < 8; pattern += 1) {
    const score = penalty(
      place(setup(version, pattern, true), codewords, pattern),
    );
    if (score < bestScore) {
      best = place(setup(version, pattern, false), codewords, pattern);
      bestScore = score;
    }
  }
  return best!;
 }
 export function qrSvg(text: string, moduleSize = 6): string {
  const matrix = encodeQr(text);
  const quiet = 4;
  const dimension = (matrix.length + quiet * 2) * moduleSize;
  const path: string[] = [];
  for (let row = 0; row < matrix.length; row += 1)
    for (let column = 0; column < matrix.length; column += 1)
      if (matrix[row]![column])
        path.push(
          `M${(column + quiet) * moduleSize} ${(row + quiet) * moduleSize}h${moduleSize}v${moduleSize}h-${moduleSize}z`,
        );
  return `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 ${dimension} ${dimension}" role="img" aria-label="OTP provisioning QR code"><rect width="100%" height="100%" fill="white"/><path d="${path.join("")}" fill="black"/></svg>`;
 }
@@ -0,0 +1,777 @@
 :root {
  --auth-blue: #315dc7;
  --auth-teal: #16806f;
  --auth-success: #19744d;
  --auth-warning: #9a6505;
 }
 [data-toolbox-theme="dark"] {
  --auth-blue: #8dacff;
  --auth-teal: #65d7c4;
  --auth-success: #67d99f;
  --auth-warning: #e8bc62;
 }
@media (prefers-color-scheme: dark) {
  [data-toolbox-theme="system"] {
    --auth-blue: #8dacff;
    --auth-teal: #65d7c4;
    --auth-success: #67d99f;
    --auth-warning: #e8bc62;
  }
 }
 * {
  box-sizing: border-box;
 }
 html {
  min-width: 320px;
  min-height: 100%;
  background: var(--toolbox-background);
 }
 body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
 }
 button,
 input,
 select,
 textarea {
  font: inherit;
 }
 button,
 select,
 input[type="checkbox"] {
  cursor: pointer;
 }
 button:focus-visible,
 input:focus-visible,
 select:focus-visible,
 textarea:focus-visible,
 summary:focus-visible,
 a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--toolbox-focus) 62%, transparent);
  outline-offset: 2px;
 }
 .auth-application,
 .workbench-loading,
 .fatal-error {
  width: min(100%, 90rem);
  margin-inline: auto;
 }
 .auth-application {
  padding: 1rem 0 3rem;
  color: var(--toolbox-text);
 }
 .workbench-loading,
 .fatal-error {
  padding: 3rem 1rem;
  text-align: center;
  color: var(--toolbox-muted);
 }
 .privacy-strip {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 3rem;
  margin-bottom: 1rem;
  padding: 0.55rem 0.7rem 0.55rem 1rem;
  border: 1px solid
    color-mix(in srgb, var(--auth-teal) 45%, var(--toolbox-border));
  border-radius: var(--toolbox-radius);
  background: color-mix(in srgb, var(--auth-teal) 7%, var(--toolbox-surface));
  font-size: 0.82rem;
 }
 .privacy-strip > div {
  flex: 1;
 }
 .privacy-strip span:not(.status-dot) {
  color: var(--toolbox-muted);
 }
 .status-dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--auth-teal);
  box-shadow: 0 0 0 0.25rem
    color-mix(in srgb, var(--auth-teal) 13%, transparent);
 }
 .workspace-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin-bottom: 1rem;
 }
 .workspace-tabs button {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  grid-template-rows: auto auto;
  column-gap: 0.7rem;
  align-items: center;
  min-height: 4.4rem;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--toolbox-border);
  border-radius: var(--toolbox-radius);
  background: var(--toolbox-surface);
  color: var(--toolbox-text);
  text-align: left;
 }
 .workspace-tabs button > span {
  grid-row: 1 / 3;
  display: grid;
  place-items: center;
  width: 2.4rem;
  aspect-ratio: 1;
  border-radius: 0.7rem;
  background: var(--toolbox-accent-soft);
  color: var(--auth-blue);
  font-size: 0.8rem;
  font-weight: 850;
 }
 .workspace-tabs strong {
  align-self: end;
 }
 .workspace-tabs small {
  align-self: start;
  color: var(--toolbox-muted);
 }
 .workspace-tabs button:hover,
 .workspace-tabs button.active {
  border-color: color-mix(in srgb, var(--auth-blue) 65%, var(--toolbox-border));
  background: color-mix(in srgb, var(--auth-blue) 5%, var(--toolbox-surface));
 }
 .workspace-tabs button.active {
  box-shadow: inset 0 -3px var(--auth-blue);
 }
 .workspace {
  min-width: 0;
 }
 .subtabs {
  display: flex;
  gap: 0.25rem;
  margin: 0 0 1rem;
  padding: 0.25rem;
  overflow-x: auto;
  border: 1px solid var(--toolbox-border);
  border-radius: calc(var(--toolbox-radius) * 0.85);
  background: var(--toolbox-surface-soft);
 }
 .subtabs button {
  flex: 0 0 auto;
  padding: 0.55rem 0.8rem;
  border: 0;
  border-radius: calc(var(--toolbox-radius) * 0.65);
  background: transparent;
  color: var(--toolbox-muted);
  font-weight: 700;
 }
 .subtabs button.active {
  background: var(--toolbox-surface);
  color: var(--toolbox-text);
  box-shadow: 0 2px 8px rgb(20 30 60 / 8%);
 }
 .otp-grid,
 .migration-grid,
 .split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(20rem, 0.85fr);
  gap: 1rem;
  align-items: start;
 }
 .migration-grid,
 .split-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
 }
 .panel {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--toolbox-border);
  border-radius: var(--toolbox-radius);
  background: var(--toolbox-surface);
  box-shadow: 0 8px 28px rgb(20 30 60 / 5%);
 }
 .panel-heading {
  display: flex;
  min-height: 4rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--toolbox-border);
 }
 .panel-heading h2,
 .panel-heading p {
  margin: 0;
 }
 .panel-heading h2 {
  font-size: 1rem;
 }
 .eyebrow {
  color: var(--toolbox-muted);
  font-size: 0.67rem;
  font-weight: 780;
  letter-spacing: 0.09em;
  text-transform: uppercase;
 }
 .panel-body {
  display: grid;
  gap: 0.85rem;
  padding: 1rem;
 }
 .panel-footer {
  padding: 1rem;
  border-top: 1px solid var(--toolbox-border);
 }
 .panel-footer p {
  margin: 0 0 0.7rem;
  color: var(--toolbox-muted);
  font-size: 0.8rem;
 }
 .form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
 }
 label {
  display: grid;
  gap: 0.35rem;
  min-width: 0;
  color: var(--toolbox-muted);
  font-size: 0.76rem;
  font-weight: 700;
 }
 label.wide,
 .wide-note {
  grid-column: 1 / -1;
 }
 input,
 select,
 textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--toolbox-border);
  border-radius: calc(var(--toolbox-radius) * 0.66);
  padding: 0.58rem 0.65rem;
  background: var(--toolbox-background);
  color: var(--toolbox-text);
 }
 textarea {
  resize: vertical;
  line-height: 1.45;
 }
 .input-actions,
 .button-row,
 .verify-row {
  display: flex;
  align-items: stretch;
  gap: 0.45rem;
 }
 .input-actions input,
 .verify-row input {
  flex: 1;
 }
 .primary-button,
 .secondary-button,
 .icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: calc(var(--toolbox-radius) * 0.7);
  padding: 0.55rem 0.75rem;
  font-weight: 720;
  text-decoration: none;
 }
 .primary-button {
  border-color: var(--toolbox-accent);
  background: var(--toolbox-accent);
  color: var(--toolbox-accent-contrast);
 }
 .primary-button:hover:not(:disabled) {
  background: var(--toolbox-accent-hover);
 }
 .secondary-button,
 .icon-button {
  border-color: var(--toolbox-border);
  background: var(--toolbox-surface);
  color: var(--toolbox-text);
 }
 .secondary-button:hover:not(:disabled),
 .icon-button:hover:not(:disabled) {
  border-color: var(--toolbox-accent);
 }
 button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
 }
 .compact-button {
  padding: 0.4rem 0.6rem;
  font-size: 0.75rem;
 }
 .badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--toolbox-border);
  border-radius: 99rem;
  padding: 0.28rem 0.55rem;
  background: var(--toolbox-surface-soft);
  color: var(--toolbox-muted);
  font-size: 0.68rem;
  font-weight: 750;
 }
 .badge.success {
  color: var(--auth-success);
  border-color: color-mix(
    in srgb,
    var(--auth-success) 45%,
    var(--toolbox-border)
  );
 }
 .badge.warning {
  color: var(--auth-warning);
  border-color: color-mix(
    in srgb,
    var(--auth-warning) 45%,
    var(--toolbox-border)
  );
 }
 .findings {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--toolbox-border);
  color: var(--toolbox-muted);
  font-size: 0.78rem;
 }
 .findings summary {
  cursor: pointer;
  font-weight: 700;
 }
 .findings ul,
 .warnings ul {
  margin-bottom: 0;
  padding-left: 1.2rem;
 }
 .code-display {
  padding: 2rem 1rem 1rem;
  color: var(--toolbox-text);
  font:
    800 clamp(2rem, 6vw, 3.5rem)/1 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  letter-spacing: 0.04em;
  text-align: center;
 }
 .countdown {
  color: var(--auth-blue);
  font-size: 0.78rem;
  font-weight: 800;
 }
 .progress {
  height: 0.28rem;
  margin: 0 1rem 1rem;
  overflow: hidden;
  border-radius: 99rem;
  background: var(--toolbox-surface-soft);
 }
 .progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--auth-blue);
  transition: width 0.4s linear;
 }
 .verify-row {
  padding: 0 1rem;
 }
 .verification {
  margin: 0.6rem 1rem 0;
  color: var(--auth-teal);
  font-size: 0.8rem;
  font-weight: 700;
 }
 .qr {
  display: grid;
  place-items: center;
  margin: 1rem auto;
 }
 .qr svg {
  width: min(100%, 16rem);
  height: auto;
  border: 1px solid var(--toolbox-border);
  border-radius: 0.7rem;
 }
 .code-panel > label,
 .code-panel > .button-row {
  margin: 0 1rem 1rem;
 }
 .notice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid;
  border-radius: var(--toolbox-radius);
 }
 .notice.error {
  border-color: color-mix(
    in srgb,
    var(--toolbox-danger) 55%,
    var(--toolbox-border)
  );
  background: color-mix(
    in srgb,
    var(--toolbox-danger) 7%,
    var(--toolbox-surface)
  );
  color: var(--toolbox-danger);
 }
 .notice button {
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 1.2rem;
 }
 .hint,
 .origin-explanation,
 .wide-note {
  margin: 0;
  color: var(--toolbox-muted);
  font-size: 0.82rem;
  line-height: 1.55;
 }
 .migration-input,
 .mono-input,
 .diagnostic-output,
 .credential-card code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
 }
 .file-button {
  position: relative;
  cursor: pointer;
 }
 .file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
 }
 .credential-list {
  display: grid;
  max-height: 28rem;
  overflow: auto;
 }
 .credential-list button {
  display: grid;
  gap: 0.15rem;
  padding: 0.8rem 1rem;
  border: 0;
  border-bottom: 1px solid var(--toolbox-border);
  background: transparent;
  color: var(--toolbox-text);
  text-align: left;
 }
 .credential-list button:hover {
  background: var(--toolbox-surface-soft);
 }
 .credential-list span,
 .credential-list small {
  color: var(--toolbox-muted);
 }
 .warnings {
  padding: 1rem;
  color: var(--auth-warning);
  font-size: 0.8rem;
 }
 .empty-state {
  display: grid;
  place-items: center;
  gap: 0.4rem;
  min-height: 15rem;
  padding: 2rem;
  color: var(--toolbox-muted);
  text-align: center;
 }
 .diagnostic-output {
  min-height: 25rem;
  max-height: 42rem;
  margin: 0;
  padding: 1rem;
  overflow: auto;
  background: var(--toolbox-background);
  color: var(--toolbox-text);
  font-size: 0.75rem;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
 }
 .compact-form {
  gap: 0.75rem;
 }
 .check-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--toolbox-text);
 }
 .check-row input {
  width: 1rem;
  height: 1rem;
 }
 .wide-note {
  padding: 1rem;
  border: 1px solid var(--toolbox-border);
  border-radius: var(--toolbox-radius);
  background: var(--toolbox-surface-soft);
 }
 .capability-list {
  display: grid;
  gap: 0;
  margin: 0;
 }
 .suite-summary {
  display: grid;
  gap: 0;
  margin: 0;
 }
 .suite-summary div {
  display: grid;
  grid-template-columns: minmax(8rem, 0.7fr) 1.3fr;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--toolbox-border);
 }
 .suite-summary dt {
  color: var(--toolbox-muted);
 }
 .suite-summary dd {
  margin: 0;
  font-weight: 700;
 }
 .inline-error {
  margin: 0;
  color: var(--toolbox-danger);
  font-size: 0.8rem;
  font-weight: 700;
 }
 .ocra-response {
  display: grid;
  gap: 0.25rem;
  padding: 1rem;
  border: 1px solid
    color-mix(in srgb, var(--auth-teal) 50%, var(--toolbox-border));
  border-radius: calc(var(--toolbox-radius) * 0.7);
  background: color-mix(in srgb, var(--auth-teal) 7%, var(--toolbox-surface));
  text-align: center;
 }
 .ocra-response span {
  color: var(--toolbox-muted);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
 }
 .ocra-response strong {
  font:
    800 2rem/1.2 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  letter-spacing: 0.08em;
 }
 .capability-list div {
  display: grid;
  grid-template-columns: minmax(8rem, 0.7fr) 1.3fr;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--toolbox-border);
 }
 .capability-list dt {
  color: var(--toolbox-muted);
 }
 .capability-list dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-weight: 700;
 }
 .centered-link {
  margin-inline: auto;
 }
 .credential-card {
  display: grid;
  gap: 0.45rem;
  padding: 0.8rem;
  border: 1px solid
    color-mix(in srgb, var(--auth-teal) 45%, var(--toolbox-border));
  border-radius: calc(var(--toolbox-radius) * 0.7);
  background: color-mix(in srgb, var(--auth-teal) 6%, var(--toolbox-surface));
 }
 .credential-card code {
  overflow: hidden;
  text-overflow: ellipsis;
 }
 .credential-card span {
  color: var(--toolbox-muted);
  font-size: 0.74rem;
 }
 .link-button {
  justify-self: start;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--toolbox-accent);
  font-weight: 700;
 }
 .verification-report {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.5rem;
 }
 .verification-report > strong {
  font-size: 1rem;
 }
 .verification-report ul {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
 }
 .verification-report li {
  display: flex;
  gap: 0.55rem;
  padding: 0.5rem;
  border: 1px solid var(--toolbox-border);
  border-radius: 0.5rem;
 }
 .verification-report li > span {
  display: grid;
  flex: 0 0 1.4rem;
  place-items: center;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--toolbox-surface-soft);
  font-weight: 850;
 }
 .verification-report li.pass > span {
  color: var(--auth-success);
 }
 .verification-report li.fail > span {
  color: var(--toolbox-danger);
 }
 .verification-report li div {
  display: grid;
  gap: 0.12rem;
 }
 .verification-report li small {
  color: var(--toolbox-muted);
 }
 .tool-dialog {
  width: min(calc(100% - 2rem), 42rem);
  max-height: min(46rem, calc(100vh - 2rem));
  padding: 0;
  overflow: auto;
  border: 1px solid var(--toolbox-border);
  border-radius: var(--toolbox-radius);
  background: var(--toolbox-surface);
  color: var(--toolbox-text);
  box-shadow: var(--toolbox-shadow);
 }
 .tool-dialog::backdrop {
  background: rgb(10 15 30 / 55%);
  backdrop-filter: blur(3px);
 }
 .dialog-heading,
 .dialog-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
 }
 .dialog-heading {
  border-bottom: 1px solid var(--toolbox-border);
 }
 .dialog-heading h2,
 .dialog-heading p {
  margin: 0;
 }
 .dialog-body {
  padding: 1rem;
 }
 .dialog-actions {
  border-top: 1px solid var(--toolbox-border);
 }
 .prose {
  line-height: 1.6;
 }
 .prose h3 {
  margin-bottom: 0.25rem;
  font-size: 1rem;
 }
 .prose p {
  margin-top: 0.25rem;
  color: var(--toolbox-muted);
 }
@media (max-width: 820px) {
  .auth-application {
    padding-inline: 0.65rem;
  }
  .otp-grid,
  .migration-grid,
  .split-grid {
    grid-template-columns: 1fr;
  }
  .workspace-tabs button {
    grid-template-columns: 2rem 1fr;
  }
  .workspace-tabs button > span {
    width: 2rem;
  }
  .privacy-strip > div span {
    display: none;
  }
 }
@media (max-width: 540px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
  label.wide {
    grid-column: auto;
  }
  .input-actions {
    flex-wrap: wrap;
  }
  .input-actions input {
    flex-basis: 100%;
  }
  .workspace-tabs small {
    display: none;
  }
  .workspace-tabs button {
    grid-template-rows: 1fr;
    min-height: 3.5rem;
  }
  .workspace-tabs button > span {
    grid-row: auto;
  }
  .privacy-strip {
    align-items: flex-start;
    flex-wrap: wrap;
  }
  .privacy-strip .compact-button {
    margin-left: 1.2rem;
  }
 }
@@ -0,0 +1,42 @@
 import "@testing-library/jest-dom/vitest";
 import { cleanup } from "@testing-library/react";
 import { afterEach, vi } from "vitest";
 if (
  !(
    HTMLDialogElement.prototype as HTMLDialogElement & {
      showModal?: () => void;
    }
  ).showModal
 ) {
  HTMLDialogElement.prototype.showModal = function showModal() {
    this.setAttribute("open", "");
  };
 }
 const nativeDialogClose = HTMLDialogElement.prototype.close;
 HTMLDialogElement.prototype.close = function close(returnValue?: string) {
  if (nativeDialogClose) {
    try {
      nativeDialogClose.call(this, returnValue);
      return;
    } catch {
      // jsdom fallback.
    }
  }
  this.removeAttribute("open");
 };
 Object.defineProperty(URL, "createObjectURL", {
  configurable: true,
  value: vi.fn(() => "blob:auth-tools-test"),
 });
 Object.defineProperty(URL, "revokeObjectURL", {
  configurable: true,
  value: vi.fn(),
 });
 afterEach(() => {
  cleanup();
  vi.clearAllMocks();
 });
@@ -0,0 +1,52 @@
 {
  "$schema": "https://git.add-ideas.de/lotobo/toolbox-sdk/raw/branch/main/schemas/toolbox-app.v1.schema.json",
  "schemaVersion": 1,
  "id": "de.add-ideas.auth-tools",
  "name": "OTP & Passkey Tools",
  "version": "0.1.0",
  "description": "Generate, inspect and verify OTP credentials and test WebAuthn/passkey ceremonies locally in the browser.",
  "entry": "./",
  "icon": "./favicon.svg",
  "categories": ["security", "authentication", "developer"],
  "tags": [
    "otp",
    "hotp",
    "totp",
    "ocra",
    "oath",
    "webauthn",
    "fido2",
    "passkey",
    "attestation",
    "assertion"
  ],
  "integration": {
    "contextVersion": 1,
    "launchModes": ["navigate", "new-tab"],
    "embedding": "unsupported"
  },
  "requirements": {
    "secureContext": true,
    "workers": false,
    "indexedDb": false,
    "crossOriginIsolated": false,
    "topLevelContext": true
  },
  "privacy": {
    "processing": "local",
    "fileUploads": false,
    "telemetry": false,
    "label": "Authentication material stays in this tab; nothing is uploaded or saved unless you explicitly export it."
  },
  "source": {
    "repository": "https://git.add-ideas.de/lotobo/auth-tools",
    "license": "GPL-3.0-or-later"
  },
  "actions": [
    {
      "id": "source",
      "label": "Source",
      "url": "https://git.add-ideas.de/lotobo/auth-tools"
    }
  ]
 }
@@ -0,0 +1,4 @@
 import { defineToolboxApp, parseToolboxApp } from "@add-ideas/toolbox-contract";
 import manifestSource from "./manifest.source.json";
 export const manifest = defineToolboxApp(parseToolboxApp(manifestSource));
@@ -0,0 +1 @@
 export const APPLICATION_VERSION = "0.1.0";
@@ -0,0 +1,204 @@
 export type CborScalar = null | boolean | number | bigint | string | Uint8Array;
 export type CborValue = CborScalar | CborValue[] | Map<CborValue, CborValue>;
 export interface DecodedCbor {
  value: CborValue;
  bytesRead: number;
 }
 export class CborDecodeError extends Error {
  constructor(message: string) {
    super(message);
    this.name = "CborDecodeError";
  }
 }
 interface Limits {
  maxDepth: number;
  maxItems: number;
  maxByteLength: number;
 }
 const DEFAULT_LIMITS: Limits = {
  maxDepth: 32,
  maxItems: 10_000,
  maxByteLength: 4 * 1024 * 1024,
 };
 class Decoder {
  private offset = 0;
  private items = 0;
  private readonly bytes: Uint8Array;
  private readonly limits: Limits;
  constructor(bytes: Uint8Array, limits: Limits) {
    this.bytes = bytes;
    this.limits = limits;
  }
  decode(): DecodedCbor {
    const value = this.readValue(0);
    return { value, bytesRead: this.offset };
  }
  private require(length: number): void {
    if (length < 0 || this.offset + length > this.bytes.byteLength) {
      throw new CborDecodeError("CBOR data ends unexpectedly.");
    }
  }
  private readByte(): number {
    this.require(1);
    return this.bytes[this.offset++]!;
  }
  private readUnsigned(length: number): bigint {
    this.require(length);
    let value = 0n;
    for (let index = 0; index < length; index += 1) {
      value = (value << 8n) | BigInt(this.bytes[this.offset++]!);
    }
    return value;
  }
  private readArgument(additional: number): bigint {
    if (additional < 24) return BigInt(additional);
    if (additional === 24) return this.readUnsigned(1);
    if (additional === 25) return this.readUnsigned(2);
    if (additional === 26) return this.readUnsigned(4);
    if (additional === 27) return this.readUnsigned(8);
    if (additional === 31) {
      throw new CborDecodeError("Indefinite-length CBOR is not accepted.");
    }
    throw new CborDecodeError(
      "CBOR uses a reserved additional-information value.",
    );
  }
  private safeLength(value: bigint): number {
    if (
      value > BigInt(this.limits.maxByteLength) ||
      value > BigInt(Number.MAX_SAFE_INTEGER)
    ) {
      throw new CborDecodeError("CBOR item exceeds the configured size limit.");
    }
    return Number(value);
  }
  private readValue(depth: number): CborValue {
    if (depth > this.limits.maxDepth)
      throw new CborDecodeError("CBOR nesting is too deep.");
    this.items += 1;
    if (this.items > this.limits.maxItems)
      throw new CborDecodeError("CBOR has too many items.");
    const initial = this.readByte();
    const major = initial >>> 5;
    const additional = initial & 31;
    const argument = this.readArgument(additional);
    if (major === 0)
      return argument <= BigInt(Number.MAX_SAFE_INTEGER)
        ? Number(argument)
        : argument;
    if (major === 1) {
      const negative = -1n - argument;
      return negative >= BigInt(Number.MIN_SAFE_INTEGER)
        ? Number(negative)
        : negative;
    }
    if (major === 2) {
      const length = this.safeLength(argument);
      this.require(length);
      const value = this.bytes.slice(this.offset, this.offset + length);
      this.offset += length;
      return value;
    }
    if (major === 3) {
      const length = this.safeLength(argument);
      this.require(length);
      const value = this.bytes.slice(this.offset, this.offset + length);
      this.offset += length;
      try {
        return new TextDecoder("utf-8", { fatal: true }).decode(value);
      } catch {
        throw new CborDecodeError("CBOR text contains invalid UTF-8.");
      }
    }
    if (major === 4) {
      const length = this.safeLength(argument);
      const output: CborValue[] = [];
      for (let index = 0; index < length; index += 1)
        output.push(this.readValue(depth + 1));
      return output;
    }
    if (major === 5) {
      const length = this.safeLength(argument);
      const output = new Map<CborValue, CborValue>();
      const keys = new Set<string>();
      for (let index = 0; index < length; index += 1) {
        const key = this.readValue(depth + 1);
        const fingerprint = this.keyFingerprint(key);
        if (keys.has(fingerprint))
          throw new CborDecodeError("CBOR map contains a duplicate key.");
        keys.add(fingerprint);
        output.set(key, this.readValue(depth + 1));
      }
      return output;
    }
    if (major === 6) {
      if (argument === 24n || argument === 55799n)
        return this.readValue(depth + 1);
      throw new CborDecodeError(
        `Unsupported CBOR semantic tag ${argument.toString()}.`,
      );
    }
    if (major === 7) {
      if (additional === 20) return false;
      if (additional === 21) return true;
      if (additional === 22) return null;
      throw new CborDecodeError(
        "Floating-point and undefined CBOR values are not accepted.",
      );
    }
    throw new CborDecodeError("Unsupported CBOR major type.");
  }
  private keyFingerprint(key: CborValue): string {
    if (key instanceof Uint8Array)
      return `b:${[...key]
        .map((byte) => byte.toString(16).padStart(2, "0"))
        .join("")}`;
    if (Array.isArray(key) || key instanceof Map)
      throw new CborDecodeError("Compound CBOR map keys are not accepted.");
    return `${typeof key}:${String(key)}`;
  }
 }
 export function decodeCbor(
  bytes: Uint8Array,
  limits: Partial<Limits> = {},
 ): DecodedCbor {
  const configured = { ...DEFAULT_LIMITS, ...limits };
  if (bytes.byteLength > configured.maxByteLength) {
    throw new CborDecodeError("CBOR input exceeds the configured size limit.");
  }
  return new Decoder(bytes, configured).decode();
 }
 export function decodeCompleteCbor(bytes: Uint8Array): CborValue {
  const decoded = decodeCbor(bytes);
  if (decoded.bytesRead !== bytes.byteLength) {
    throw new CborDecodeError("CBOR contains trailing data.");
  }
  return decoded.value;
 }
 export function cborMap(
  value: CborValue,
  label = "CBOR value",
 ): Map<CborValue, CborValue> {
  if (!(value instanceof Map))
    throw new CborDecodeError(`${label} must be a map.`);
  return value;
 }
@@ -0,0 +1,196 @@
 import {
  base64UrlToBytes,
  bytesToArrayBuffer,
  bytesToBase64Url,
  randomBytes,
 } from "../crypto/encoding";
 import {
  coseKeyToJson,
  verifyAssertion,
  type AssertionVerificationResult,
 } from "./verify";
 import { parseAttestationObject } from "./parser";
 export const LIVE_HOST = "auth.toolbox.add-ideas.de";
 export interface BrowserCapabilities {
  secureContext: boolean;
  credentialsApi: boolean;
  publicKeyCredential: boolean;
  conditionalMediation: boolean | null;
  platformAuthenticator: boolean | null;
 }
 export interface MemoryCredential {
  id: string;
  publicKey: Record<string, string | number>;
  signCount: number;
  transports: AuthenticatorTransport[];
  createdAt: string;
  aaguid: string;
  format: string;
 }
 export function liveLabAvailability(
  location: Pick<Location, "hostname" | "origin">,
 ): {
  available: boolean;
  reason: string;
  rpId: string;
 } {
  const local =
    location.hostname === "localhost" ||
    location.hostname === "127.0.0.1" ||
    location.hostname === "::1";
  const dedicated = location.hostname === LIVE_HOST;
  return {
    available: Boolean(globalThis.isSecureContext && (local || dedicated)),
    rpId: location.hostname,
    reason: !globalThis.isSecureContext
      ? "WebAuthn requires a secure context."
      : local || dedicated
        ? `Ceremonies are bound to ${location.origin}.`
        : `Live ceremonies are isolated at https://${LIVE_HOST}; this shared Portal origin is inspect-only.`,
  };
 }
 export async function detectCapabilities(): Promise<BrowserCapabilities> {
  const credential =
    typeof PublicKeyCredential === "undefined"
      ? undefined
      : PublicKeyCredential;
  const conditional =
    credential && "isConditionalMediationAvailable" in credential
      ? await PublicKeyCredential.isConditionalMediationAvailable().catch(
          () => false,
        )
      : null;
  const platform =
    credential && "isUserVerifyingPlatformAuthenticatorAvailable" in credential
      ? await PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable().catch(
          () => false,
        )
      : null;
  return {
    secureContext: globalThis.isSecureContext,
    credentialsApi: typeof navigator.credentials !== "undefined",
    publicKeyCredential: Boolean(credential),
    conditionalMediation: conditional,
    platformAuthenticator: platform,
  };
 }
 export async function createMemoryCredential(input: {
  userName: string;
  userDisplayName: string;
  attestation: AttestationConveyancePreference;
  authenticatorAttachment?: AuthenticatorAttachment;
 }): Promise<MemoryCredential> {
  const availability = liveLabAvailability(window.location);
  if (!availability.available) throw new Error(availability.reason);
  const challenge = randomBytes(32);
  const userId = randomBytes(32);
  const publicKey: PublicKeyCredentialCreationOptions = {
    challenge: bytesToArrayBuffer(challenge),
    rp: { id: availability.rpId, name: "add·ideas Authentication Lab" },
    user: {
      id: bytesToArrayBuffer(userId),
      name: input.userName.trim() || "local-user",
      displayName:
        input.userDisplayName.trim() || input.userName.trim() || "Local user",
    },
    pubKeyCredParams: [
      { type: "public-key", alg: -7 },
      { type: "public-key", alg: -257 },
      { type: "public-key", alg: -8 },
    ],
    timeout: 120_000,
    attestation: input.attestation,
    authenticatorSelection: {
      residentKey: "preferred",
      userVerification: "preferred",
      ...(input.authenticatorAttachment
        ? { authenticatorAttachment: input.authenticatorAttachment }
        : {}),
    },
  };
  const credential = await navigator.credentials.create({ publicKey });
  if (
    !(credential instanceof PublicKeyCredential) ||
    !(credential.response instanceof AuthenticatorAttestationResponse)
  ) {
    throw new Error("Browser did not return a WebAuthn registration response.");
  }
  const parsed = parseAttestationObject(
    new Uint8Array(credential.response.attestationObject),
  );
  const attested = parsed.authenticator.attestedCredential;
  if (!attested)
    throw new Error(
      "Registration response does not contain a credential public key.",
    );
  return {
    id: credential.id,
    publicKey: coseKeyToJson(attested.credentialPublicKey),
    signCount: parsed.authenticator.signCount,
    transports: (credential.response.getTransports?.() ?? []).filter(
      (value): value is AuthenticatorTransport =>
        [
          "ble",
          "cable",
          "hybrid",
          "internal",
          "nfc",
          "smart-card",
          "usb",
        ].includes(value),
    ),
    createdAt: new Date().toISOString(),
    aaguid: attested.aaguid,
    format: parsed.format,
  };
 }
 export async function exerciseMemoryCredential(
  credential: MemoryCredential,
  requireUserVerification: boolean,
 ): Promise<AssertionVerificationResult> {
  const availability = liveLabAvailability(window.location);
  if (!availability.available) throw new Error(availability.reason);
  const challenge = randomBytes(32);
  const publicKey: PublicKeyCredentialRequestOptions = {
    challenge: bytesToArrayBuffer(challenge),
    rpId: availability.rpId,
    timeout: 120_000,
    userVerification: requireUserVerification ? "required" : "preferred",
    allowCredentials: [
      {
        type: "public-key",
        id: bytesToArrayBuffer(base64UrlToBytes(credential.id)),
        transports: credential.transports,
      },
    ],
  };
  const result = await navigator.credentials.get({ publicKey });
  if (
    !(result instanceof PublicKeyCredential) ||
    !(result.response instanceof AuthenticatorAssertionResponse)
  ) {
    throw new Error("Browser did not return a WebAuthn assertion response.");
  }
  return verifyAssertion({
    clientDataJSON: bytesToBase64Url(
      new Uint8Array(result.response.clientDataJSON),
    ),
    authenticatorData: bytesToBase64Url(
      new Uint8Array(result.response.authenticatorData),
    ),
    signature: bytesToBase64Url(new Uint8Array(result.response.signature)),
    credentialPublicKey: JSON.stringify(credential.publicKey),
    expectedChallenge: bytesToBase64Url(challenge),
    expectedOrigin: window.location.origin,
    expectedRpId: availability.rpId,
    requireUserVerification,
    previousSignCount: credential.signCount,
  });
 }
@@ -0,0 +1,202 @@
 import {
  base64UrlToBytes,
  bytesToBase64Url,
  bytesToHex,
  bytesToUtf8,
 } from "../crypto/encoding";
 import {
  cborMap,
  decodeCbor,
  decodeCompleteCbor,
  type CborValue,
 } from "./cbor";
 export interface AuthenticatorFlags {
  userPresent: boolean;
  userVerified: boolean;
  backupEligible: boolean;
  backupState: boolean;
  attestedCredentialData: boolean;
  extensionData: boolean;
  raw: number;
 }
 export interface AttestedCredentialData {
  aaguid: string;
  credentialId: string;
  credentialPublicKey: Map<CborValue, CborValue>;
 }
 export interface ParsedAuthenticatorData {
  rpIdHash: string;
  flags: AuthenticatorFlags;
  signCount: number;
  attestedCredential?: AttestedCredentialData;
  extensions?: CborValue;
  bytesRead: number;
  raw: Uint8Array;
 }
 export interface ParsedAttestation {
  format: string;
  statement: Map<CborValue, CborValue>;
  authenticator: ParsedAuthenticatorData;
 }
 export interface CollectedClientData {
  type: string;
  challenge: string;
  origin: string;
  crossOrigin?: boolean;
  tokenBinding?: unknown;
  [key: string]: unknown;
 }
 function readU16(bytes: Uint8Array, offset: number): number {
  if (offset + 2 > bytes.byteLength)
    throw new Error("Authenticator data ends unexpectedly.");
  return (bytes[offset]! << 8) | bytes[offset + 1]!;
 }
 function readU32(bytes: Uint8Array, offset: number): number {
  if (offset + 4 > bytes.byteLength)
    throw new Error("Authenticator data ends unexpectedly.");
  return new DataView(bytes.buffer, bytes.byteOffset + offset, 4).getUint32(
    0,
    false,
  );
 }
 export function parseAuthenticatorData(
  bytes: Uint8Array,
 ): ParsedAuthenticatorData {
  if (bytes.byteLength < 37)
    throw new Error("Authenticator data must contain at least 37 bytes.");
  const flagByte = bytes[32]!;
  const flags: AuthenticatorFlags = {
    userPresent: Boolean(flagByte & 0x01),
    userVerified: Boolean(flagByte & 0x04),
    backupEligible: Boolean(flagByte & 0x08),
    backupState: Boolean(flagByte & 0x10),
    attestedCredentialData: Boolean(flagByte & 0x40),
    extensionData: Boolean(flagByte & 0x80),
    raw: flagByte,
  };
  if (flags.backupState && !flags.backupEligible) {
    throw new Error(
      "Authenticator flags set backup state without backup eligibility.",
    );
  }
  let offset = 37;
  let attestedCredential: AttestedCredentialData | undefined;
  if (flags.attestedCredentialData) {
    if (offset + 18 > bytes.byteLength)
      throw new Error("Attested credential data is truncated.");
    const aaguidBytes = bytes.slice(offset, offset + 16);
    offset += 16;
    const credentialLength = readU16(bytes, offset);
    offset += 2;
    if (
      credentialLength === 0 ||
      offset + credentialLength > bytes.byteLength
    ) {
      throw new Error("Attested credential ID length is invalid.");
    }
    const credentialId = bytes.slice(offset, offset + credentialLength);
    offset += credentialLength;
    const decodedKey = decodeCbor(bytes.slice(offset));
    const credentialPublicKey = cborMap(
      decodedKey.value,
      "Credential public key",
    );
    offset += decodedKey.bytesRead;
    const hex = bytesToHex(aaguidBytes);
    attestedCredential = {
      aaguid: `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20)}`,
      credentialId: bytesToBase64Url(credentialId),
      credentialPublicKey,
    };
  }
  let extensions: CborValue | undefined;
  if (flags.extensionData) {
    const decoded = decodeCbor(bytes.slice(offset));
    extensions = decoded.value;
    offset += decoded.bytesRead;
  }
  if (offset !== bytes.byteLength) {
    throw new Error(
      "Authenticator data contains bytes not described by its flags.",
    );
  }
  return {
    rpIdHash: bytesToHex(bytes.slice(0, 32)),
    flags,
    signCount: readU32(bytes, 33),
    ...(attestedCredential ? { attestedCredential } : {}),
    ...(extensions !== undefined ? { extensions } : {}),
    bytesRead: offset,
    raw: bytes,
  };
 }
 export function parseAttestationObject(
  input: string | Uint8Array,
 ): ParsedAttestation {
  const bytes = typeof input === "string" ? base64UrlToBytes(input) : input;
  const map = cborMap(decodeCompleteCbor(bytes), "Attestation object");
  const format = map.get("fmt");
  const authData = map.get("authData");
  const statement = map.get("attStmt");
  if (typeof format !== "string")
    throw new Error("Attestation format is missing.");
  if (!(authData instanceof Uint8Array))
    throw new Error("Attestation authData is missing.");
  return {
    format,
    statement: cborMap(statement ?? null, "Attestation statement"),
    authenticator: parseAuthenticatorData(authData),
  };
 }
 export function parseClientData(
  input: string | Uint8Array,
 ): CollectedClientData {
  const bytes = typeof input === "string" ? base64UrlToBytes(input) : input;
  let value: unknown;
  try {
    value = JSON.parse(bytesToUtf8(bytes));
  } catch {
    throw new Error("Client data is not valid UTF-8 JSON.");
  }
  if (!value || typeof value !== "object" || Array.isArray(value)) {
    throw new Error("Client data must be a JSON object.");
  }
  const object = value as Record<string, unknown>;
  if (
    typeof object.type !== "string" ||
    typeof object.challenge !== "string" ||
    typeof object.origin !== "string"
  ) {
    throw new Error("Client data requires type, challenge and origin strings.");
  }
  if (
    object.crossOrigin !== undefined &&
    typeof object.crossOrigin !== "boolean"
  ) {
    throw new Error("Client data crossOrigin must be boolean when present.");
  }
  return object as CollectedClientData;
 }
 export function cborDiagnostic(value: CborValue): unknown {
  if (value instanceof Uint8Array) {
    return { base64url: bytesToBase64Url(value), bytes: value.byteLength };
  }
  if (Array.isArray(value)) return value.map(cborDiagnostic);
  if (value instanceof Map) {
    return Object.fromEntries(
      [...value].map(([key, item]) => [String(key), cborDiagnostic(item)]),
    );
  }
  return typeof value === "bigint" ? `${value.toString()}n` : value;
 }
@@ -0,0 +1,386 @@
 import {
  base64UrlToBytes,
  bytesToArrayBuffer,
  bytesToBase64Url,
  bytesToHex,
  utf8ToBytes,
 } from "../crypto/encoding";
 import type { CborValue } from "./cbor";
 import { parseAuthenticatorData, parseClientData } from "./parser";
 export type CheckStatus = "pass" | "fail" | "warning" | "information";
 export interface VerificationCheck {
  name: string;
  status: CheckStatus;
  detail: string;
 }
 export interface AssertionVerificationInput {
  clientDataJSON: string;
  authenticatorData: string;
  signature: string;
  credentialPublicKey: string | Map<CborValue, CborValue>;
  expectedChallenge: string;
  expectedOrigin: string;
  expectedRpId: string;
  requireUserVerification?: boolean;
  previousSignCount?: number;
 }
 export interface AssertionVerificationResult {
  verified: boolean;
  checks: VerificationCheck[];
  signCount: number;
 }
 function bytesEqual(left: Uint8Array, right: Uint8Array): boolean {
  if (left.byteLength !== right.byteLength) return false;
  let difference = 0;
  for (let index = 0; index < left.byteLength; index += 1)
    difference |= left[index]! ^ right[index]!;
  return difference === 0;
 }
 async function digest(bytes: Uint8Array): Promise<Uint8Array> {
  return new Uint8Array(
    await crypto.subtle.digest("SHA-256", bytesToArrayBuffer(bytes)),
  );
 }
 function coseNumber(map: Map<CborValue, CborValue>, key: number): number {
  const value = map.get(key);
  if (typeof value !== "number")
    throw new Error(`COSE key parameter ${key} is missing.`);
  return value;
 }
 function coseBytes(map: Map<CborValue, CborValue>, key: number): Uint8Array {
  const value = map.get(key);
  if (!(value instanceof Uint8Array))
    throw new Error(`COSE key parameter ${key} is missing.`);
  return value;
 }
 function decodeCoseJson(input: string): Map<CborValue, CborValue> {
  let value: unknown;
  try {
    value = JSON.parse(input);
  } catch {
    throw new Error("Credential public key JSON is invalid.");
  }
  if (!value || typeof value !== "object" || Array.isArray(value)) {
    throw new Error("Credential public key must be a JSON object.");
  }
  const result = new Map<CborValue, CborValue>();
  for (const [rawKey, item] of Object.entries(value)) {
    const key = Number(rawKey);
    if (!Number.isInteger(key))
      throw new Error("COSE key labels must be integers.");
    if (typeof item === "string" && /^[-_A-Za-z0-9]+=*$/u.test(item)) {
      result.set(key, base64UrlToBytes(item));
    } else if (typeof item === "number") result.set(key, item);
    else throw new Error(`Unsupported COSE value for label ${rawKey}.`);
  }
  return result;
 }
 export function coseKeyToJson(
  map: Map<CborValue, CborValue>,
 ): Record<string, string | number> {
  const result: Record<string, string | number> = {};
  for (const [key, value] of map) {
    if (typeof key !== "number") continue;
    if (typeof value === "number") result[String(key)] = value;
    else if (value instanceof Uint8Array)
      result[String(key)] = bytesToBase64Url(value);
  }
  return result;
 }
 function derEcdsaToRaw(signature: Uint8Array, size = 32): Uint8Array {
  if (signature[0] !== 0x30)
    throw new Error("ECDSA signature is not a DER sequence.");
  let offset = 1;
  let sequenceLength = signature[offset++]!;
  if (sequenceLength & 0x80) {
    const lengthBytes = sequenceLength & 0x7f;
    if (
      lengthBytes === 0 ||
      lengthBytes > 2 ||
      offset + lengthBytes > signature.length
    )
      throw new Error("ECDSA DER length is invalid.");
    sequenceLength = 0;
    for (let index = 0; index < lengthBytes; index += 1)
      sequenceLength = sequenceLength * 256 + signature[offset++]!;
  }
  if (
    offset + sequenceLength !== signature.length ||
    signature[offset++] !== 0x02
  )
    throw new Error("ECDSA DER sequence is malformed.");
  const rLength = signature[offset++]!;
  const r = signature.slice(offset, offset + rLength);
  offset += rLength;
  if (signature[offset++] !== 0x02)
    throw new Error("ECDSA DER sequence lacks s.");
  const sLength = signature[offset++]!;
  const s = signature.slice(offset, offset + sLength);
  if (offset + sLength !== signature.length)
    throw new Error("ECDSA DER signature has trailing data.");
  const normalize = (integer: Uint8Array): Uint8Array => {
    if (!integer.length || (integer[0]! & 0x80) !== 0)
      throw new Error("ECDSA DER integer is negative or empty.");
    if (integer.length > 1 && integer[0] === 0 && (integer[1]! & 0x80) === 0)
      throw new Error("ECDSA DER integer is not minimally encoded.");
    let start = 0;
    while (start < integer.length - 1 && integer[start] === 0) start += 1;
    const stripped = integer.slice(start);
    if (stripped.length > size) throw new Error("ECDSA integer is too large.");
    const output = new Uint8Array(size);
    output.set(stripped, size - stripped.length);
    return output;
  };
  const output = new Uint8Array(size * 2);
  output.set(normalize(r));
  output.set(normalize(s), size);
  return output;
 }
 async function importCoseKey(map: Map<CborValue, CborValue>): Promise<{
  key: CryptoKey;
  algorithm: AlgorithmIdentifier | RsaPssParams | EcdsaParams;
  normalizeSignature: (signature: Uint8Array) => Uint8Array;
 }> {
  const kty = coseNumber(map, 1);
  const alg = coseNumber(map, 3);
  if (kty === 2 && alg === -7 && coseNumber(map, -1) === 1) {
    const jwk: JsonWebKey = {
      kty: "EC",
      crv: "P-256",
      x: bytesToBase64Url(coseBytes(map, -2)),
      y: bytesToBase64Url(coseBytes(map, -3)),
      ext: true,
    };
    return {
      key: await crypto.subtle.importKey(
        "jwk",
        jwk,
        { name: "ECDSA", namedCurve: "P-256" },
        false,
        ["verify"],
      ),
      algorithm: { name: "ECDSA", hash: "SHA-256" },
      normalizeSignature: derEcdsaToRaw,
    };
  }
  if (kty === 3 && (alg === -257 || alg === -37)) {
    const jwk: JsonWebKey = {
      kty: "RSA",
      n: bytesToBase64Url(coseBytes(map, -1)),
      e: bytesToBase64Url(coseBytes(map, -2)),
      ext: true,
    };
    const name = alg === -37 ? "RSA-PSS" : "RSASSA-PKCS1-v1_5";
    return {
      key: await crypto.subtle.importKey(
        "jwk",
        jwk,
        { name, hash: "SHA-256" },
        false,
        ["verify"],
      ),
      algorithm: alg === -37 ? { name, saltLength: 32 } : name,
      normalizeSignature: (signature) => signature,
    };
  }
  if (kty === 1 && alg === -8 && coseNumber(map, -1) === 6) {
    const jwk: JsonWebKey = {
      kty: "OKP",
      crv: "Ed25519",
      x: bytesToBase64Url(coseBytes(map, -2)),
      ext: true,
    };
    return {
      key: await crypto.subtle.importKey("jwk", jwk, "Ed25519", false, [
        "verify",
      ]),
      algorithm: "Ed25519",
      normalizeSignature: (signature) => signature,
    };
  }
  throw new Error(
    `Unsupported COSE key type/algorithm combination: kty ${kty}, alg ${alg}.`,
  );
 }
 function addCheck(
  checks: VerificationCheck[],
  name: string,
  pass: boolean,
  detail: string,
 ): void {
  checks.push({ name, status: pass ? "pass" : "fail", detail });
 }
 export async function verifyAssertion(
  input: AssertionVerificationInput,
 ): Promise<AssertionVerificationResult> {
  const checks: VerificationCheck[] = [];
  const clientBytes = base64UrlToBytes(input.clientDataJSON);
  const authBytes = base64UrlToBytes(input.authenticatorData);
  const client = parseClientData(clientBytes);
  const authenticator = parseAuthenticatorData(authBytes);
  addCheck(
    checks,
    "Ceremony type",
    client.type === "webauthn.get",
    `Received ${client.type}.`,
  );
  const challengeMatches = (() => {
    try {
      return bytesEqual(
        base64UrlToBytes(client.challenge),
        base64UrlToBytes(input.expectedChallenge),
      );
    } catch {
      return false;
    }
  })();
  addCheck(
    checks,
    "Challenge",
    challengeMatches,
    challengeMatches
      ? "Challenge matches exactly."
      : "Challenge does not match.",
  );
  let receivedOriginValid = false;
  let expectedOriginValid = false;
  try {
    receivedOriginValid = new URL(client.origin).origin === client.origin;
  } catch {
    // Reported as a failed syntax check below.
  }
  try {
    expectedOriginValid =
      new URL(input.expectedOrigin).origin === input.expectedOrigin;
  } catch {
    // Reported as a failed syntax check below.
  }
  addCheck(
    checks,
    "Origin syntax",
    receivedOriginValid && expectedOriginValid,
    "Origins must be serialized, absolute URL origins without a path.",
  );
  addCheck(
    checks,
    "Origin",
    receivedOriginValid &&
      expectedOriginValid &&
      client.origin === input.expectedOrigin,
    `Received ${client.origin}.`,
  );
  addCheck(
    checks,
    "Cross-origin",
    client.crossOrigin !== true,
    client.crossOrigin === true
      ? "Client data marks this ceremony cross-origin."
      : "Ceremony is not marked cross-origin.",
  );
  const expectedRpHash = await digest(utf8ToBytes(input.expectedRpId));
  addCheck(
    checks,
    "RP ID hash",
    bytesToHex(expectedRpHash) === authenticator.rpIdHash,
    `Expected SHA-256(${input.expectedRpId}).`,
  );
  addCheck(
    checks,
    "User presence",
    authenticator.flags.userPresent,
    "Authenticator UP flag must be set.",
  );
  if (input.requireUserVerification)
    addCheck(
      checks,
      "User verification",
      authenticator.flags.userVerified,
      "User verification was required.",
    );
  else
    checks.push({
      name: "User verification",
      status: "information",
      detail: authenticator.flags.userVerified
        ? "UV flag is set."
        : "UV was not required and is not set.",
    });
  if (
    input.previousSignCount !== undefined &&
    input.previousSignCount > 0 &&
    authenticator.signCount > 0
  ) {
    addCheck(
      checks,
      "Signature counter",
      authenticator.signCount > input.previousSignCount,
      `Previous ${input.previousSignCount}; received ${authenticator.signCount}.`,
    );
  } else {
    checks.push({
      name: "Signature counter",
      status: "information",
      detail: `Received ${authenticator.signCount}; zero/non-incrementing counters can be valid for multi-device credentials.`,
    });
  }
  try {
    const cose =
      typeof input.credentialPublicKey === "string"
        ? decodeCoseJson(input.credentialPublicKey)
        : input.credentialPublicKey;
    const imported = await importCoseKey(cose);
    const clientHash = await digest(clientBytes);
    const signed = new Uint8Array(authBytes.byteLength + clientHash.byteLength);
    signed.set(authBytes);
    signed.set(clientHash, authBytes.byteLength);
    const signature = imported.normalizeSignature(
      base64UrlToBytes(input.signature),
    );
    const valid = await crypto.subtle.verify(
      imported.algorithm,
      imported.key,
      bytesToArrayBuffer(signature),
      bytesToArrayBuffer(signed),
    );
    addCheck(
      checks,
      "Cryptographic signature",
      valid,
      valid
        ? "Signature verifies with the supplied credential key."
        : "Signature verification failed.",
    );
  } catch (error) {
    checks.push({
      name: "Cryptographic signature",
      status: "fail",
      detail:
        error instanceof Error
          ? error.message
          : "Signature verification failed.",
    });
  }
  return {
    verified: checks.every((check) => check.status !== "fail"),
    checks,
    signCount: authenticator.signCount,
  };
 }
@@ -0,0 +1,61 @@
 import { expect, test } from "@playwright/test";
 test("runs from a nested path and keeps authentication material local", async ({
  page,
 }) => {
  const requests: string[] = [];
  page.on("request", (request) => requests.push(request.url()));
  await page.goto("/deep/nested/auth/");
  await expect(page.getByText("Sensitive session · memory only")).toBeVisible();
  await expect(
    page.getByRole("heading", { name: "Credential parameters" }),
  ).toBeVisible();
  await page.getByLabel("Issuer").fill("Example");
  await page.getByLabel("Account").fill("alice@example.test");
  await expect(page.getByText("TOTP code")).toBeVisible();
  await expect(page.locator(".qr svg")).toBeVisible();
  expect(
    requests.every((url) => new URL(url).origin === "http://127.0.0.1:4173"),
  ).toBe(true);
 });
 test("computes an RFC OCRA vector and decodes client data", async ({
  page,
 }) => {
  await page.goto("/deep/nested/auth/");
  await page.getByRole("button", { name: "OCRA challenge" }).click();
  await page
    .getByLabel("Base32 shared secret")
    .fill("GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ");
  await page.getByRole("button", { name: "Compute OCRA response" }).click();
  await expect(page.getByText("237653")).toBeVisible();
  await page.getByRole("button", { name: /WebAuthn \/ Passkeys/ }).click();
  const client = btoa(
    JSON.stringify({
      type: "webauthn.get",
      challenge: "YQ",
      origin: "https://example.test",
    }),
  )
    .replaceAll("+", "-")
    .replaceAll("/", "_")
    .replace(/=+$/u, "");
  await page.getByLabel("Encoded input").fill(client);
  await page.getByRole("button", { name: "Decode locally" }).click();
  await expect(page.locator(".diagnostic-output")).toContainText(
    "webauthn.get",
  );
 });
 test("shared origin exposes inspection but not live credential creation", async ({
  page,
 }) => {
  await page.goto("/deep/nested/auth/");
  await page.getByRole("button", { name: /WebAuthn \/ Passkeys/ }).click();
  await page.getByRole("button", { name: "Live ceremony" }).click();
  await expect(page.getByText("Inspect only")).toBeVisible();
  await expect(
    page.getByRole("button", { name: "Create test credential" }),
  ).toBeDisabled();
 });
@@ -0,0 +1,41 @@
 import { render, screen } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
 import { describe, expect, it } from "vitest";
 import { Workbench } from "../../src/components/Workbench";
 describe("authentication workbench", () => {
  it("switches independent workspaces and clears sensitive session state", async () => {
    const user = userEvent.setup();
    render(<Workbench />);
    expect(
      screen.getByRole("heading", { name: "Credential parameters" }),
    ).toBeInTheDocument();
    await user.click(screen.getByRole("button", { name: /OCRA challenge/iu }));
    expect(
      screen.getByRole("heading", { name: "OCRA suite and key" }),
    ).toBeInTheDocument();
    await user.click(
      screen.getByRole("button", { name: /WebAuthn \/ Passkeys/iu }),
    );
    expect(
      screen.getByRole("heading", { name: "WebAuthn structure" }),
    ).toBeInTheDocument();
    await user.click(screen.getByRole("button", { name: "Clear session" }));
    expect(
      screen.getByRole("heading", { name: "WebAuthn structure" }),
    ).toBeInTheDocument();
  });
  it("keeps live ceremonies disabled on the shared/non-dedicated origin", async () => {
    const user = userEvent.setup();
    render(<Workbench />);
    await user.click(
      screen.getByRole("button", { name: /WebAuthn \/ Passkeys/iu }),
    );
    await user.click(screen.getByRole("button", { name: "Live ceremony" }));
    expect(screen.getByText("Inspect only")).toBeInTheDocument();
    expect(
      screen.getByRole("button", { name: "Create test credential" }),
    ).toBeDisabled();
  });
 });
@@ -0,0 +1,30 @@
 import { describe, expect, it } from "vitest";
 import {
  base32ToBytes,
  base64UrlToBytes,
  bytesToBase32,
  bytesToBase64Url,
  bytesToHex,
  hexToBytes,
  utf8ToBytes,
 } from "../../src/crypto/encoding";
 describe("encoding", () => {
  it("round-trips RFC 4648-style encodings", () => {
    const bytes = utf8ToBytes("Hello!\u{1f512}");
    expect([...base32ToBytes(bytesToBase32(bytes))]).toEqual([...bytes]);
    expect([...base64UrlToBytes(bytesToBase64Url(bytes))]).toEqual([...bytes]);
    expect([...hexToBytes(bytesToHex(bytes))]).toEqual([...bytes]);
  });
  it("rejects non-zero trailing Base32 bits", () => {
    expect(() => base32ToBytes("AB")).toThrow(/trailing bits/iu);
  });
  it("accepts deliberate manual separators only when enabled", () => {
    expect(() => base32ToBytes("JBSW Y3DP")).toThrow();
    expect([...base32ToBytes("JBSW-Y3DP", { allowSeparators: true })]).toEqual([
      ...utf8ToBytes("Hello"),
    ]);
  });
 });
@@ -0,0 +1,66 @@
 import { describe, expect, it } from "vitest";
 import {
  exportCsv,
  importCsv,
  importOtpAuthList,
  importPlainPskc,
 } from "../../src/otp/migration";
 import { utf8ToBytes } from "../../src/crypto/encoding";
 import type { OtpProfile } from "../../src/otp/profile";
 const profile: OtpProfile = {
  kind: "totp",
  account: 'alice,"admin"',
  issuer: "Example",
  secret: utf8ToBytes("12345678901234567890"),
  algorithm: "SHA-256",
  digits: 8,
  period: 45,
  counter: 0n,
  extensions: new Map(),
 };
 describe("OTP migrations", () => {
  it("round-trips the documented CSV including quoting", () => {
    const result = importCsv(exportCsv([profile]));
    expect(result.profiles[0]).toMatchObject({
      account: profile.account,
      issuer: "Example",
      algorithm: "SHA-256",
      digits: 8,
      period: 45,
    });
    expect([...result.profiles[0]!.secret]).toEqual([...profile.secret]);
  });
  it("neutralizes spreadsheet formulas without changing a round trip", () => {
    const dangerous = { ...profile, account: '=HYPERLINK("https://bad")' };
    const csv = exportCsv([dangerous]);
    expect(csv).toContain("'=HYPERLINK");
    expect(importCsv(csv).profiles[0]!.account).toBe(dangerous.account);
  });
  it("reports the failing line in URI lists", () => {
    expect(() =>
      importOtpAuthList("otpauth://totp/Good?secret=JBSWY3DPEHPK3PXP\nnope"),
    ).toThrow(/Line 2/iu);
  });
  it("imports plain-secret PSKC and refuses encrypted keys", () => {
    const xml = `<KeyContainer xmlns="urn:ietf:params:xml:ns:keyprov:pskc"><KeyPackage><Key Id="alice" Algorithm="urn:ietf:params:xml:ns:keyprov:pskc:totp"><Issuer>Example</Issuer><Data><Secret><PlainValue>MTIzNDU2Nzg5MDEyMzQ1Njc4OTA=</PlainValue></Secret><TimeInterval><PlainValue>30</PlainValue></TimeInterval></Data><Policy><KeyUsage>OTP</KeyUsage></Policy><ResponseFormat Length="6" Encoding="DECIMAL"/></Key></KeyPackage></KeyContainer>`;
    expect(importPlainPskc(xml).profiles[0]).toMatchObject({
      kind: "totp",
      account: "alice",
      issuer: "Example",
      digits: 6,
    });
    expect(() =>
      importPlainPskc(
        xml.replace(
          "<PlainValue>MTIzNDU2Nzg5MDEyMzQ1Njc4OTA=</PlainValue>",
          "<EncryptedValue/>",
        ),
      ),
    ).toThrow(/encrypted/iu);
  });
 });
@@ -0,0 +1,75 @@
 import { describe, expect, it } from "vitest";
 import { hexToBytes, utf8ToBytes } from "../../src/crypto/encoding";
 import { hashOcraPassword, ocra, parseOcraSuite } from "../../src/otp/ocra";
 describe("OCRA", () => {
  it("parses complete suites and rejects reordered inputs", () => {
    expect(
      parseOcraSuite("OCRA-1:HOTP-SHA512-8:C-QN08-PSHA1-S064-T1M"),
    ).toMatchObject({
      algorithm: "SHA-512",
      digits: 8,
      counter: true,
      questionFormat: "numeric",
      passwordAlgorithm: "SHA-1",
      sessionLength: 64,
      timeStepSeconds: 60,
    });
    expect(() => parseOcraSuite("OCRA-1:HOTP-SHA1-6:QN08-T1M-PSHA1")).toThrow(
      /order/iu,
    );
  });
  it("matches RFC 6287 one-way challenge vectors", async () => {
    const secret = utf8ToBytes("12345678901234567890");
    const expected = [
      "237653",
      "243178",
      "653583",
      "740991",
      "608993",
      "388898",
      "816933",
      "224598",
      "750600",
      "294470",
    ];
    for (let index = 0; index < expected.length; index += 1) {
      await expect(
        ocra({
          suite: "OCRA-1:HOTP-SHA1-6:QN08",
          secret,
          question: String(index).repeat(8),
        }),
      ).resolves.toBe(expected[index]);
    }
  });
  it("matches RFC 6287 counter/PIN and timestamp vectors", async () => {
    const secret32 = utf8ToBytes("12345678901234567890123456789012");
    const pinHash = await hashOcraPassword("1234", "SHA-1");
    expect([...pinHash]).toEqual([
      ...hexToBytes("7110eda4d09e062aa5e4a390b0a572ac0d2c0220"),
    ]);
    await expect(
      ocra({
        suite: "OCRA-1:HOTP-SHA256-8:C-QN08-PSHA1",
        secret: secret32,
        counter: 0n,
        question: "12345678",
        passwordHash: pinHash,
      }),
    ).resolves.toBe("65347737");
    const secret64 = utf8ToBytes(
      "1234567890123456789012345678901234567890123456789012345678901234",
    );
    await expect(
      ocra({
        suite: "OCRA-1:HOTP-SHA512-8:QN08-T1M",
        secret: secret64,
        question: "00000000",
        timeStep: 0x132d0b6n,
      }),
    ).resolves.toBe("95209754");
  });
 });
@@ -0,0 +1,106 @@
 import { describe, expect, it } from "vitest";
 import { utf8ToBytes } from "../../src/crypto/encoding";
 import {
  hotp,
  totp,
  totpCounter,
  verifyHotp,
  verifyTotp,
 } from "../../src/otp/otp";
 describe("HOTP", () => {
  it("matches every RFC 4226 test value", async () => {
    const secret = utf8ToBytes("12345678901234567890");
    const expected = [
      "755224",
      "287082",
      "359152",
      "969429",
      "338314",
      "254676",
      "287922",
      "162583",
      "399871",
      "520489",
    ];
    await expect(
      Promise.all(
        expected.map((_, counter) =>
          hotp({ secret, counter: BigInt(counter) }),
        ),
      ),
    ).resolves.toEqual(expected);
  });
  it("searches forward without losing leading zeroes", async () => {
    const secret = utf8ToBytes("12345678901234567890");
    const match = await verifyHotp("338314", {
      secret,
      counter: 1n,
      lookAhead: 5,
    });
    expect(match).toMatchObject({ counter: 4n, delta: 3 });
  });
 });
 describe("TOTP", () => {
  const cases = [
    [59, "94287082", "46119246", "90693936"],
    [1_111_111_109, "07081804", "68084774", "25091201"],
    [1_111_111_111, "14050471", "67062674", "99943326"],
    [1_234_567_890, "89005924", "91819424", "93441116"],
    [2_000_000_000, "69279037", "90698825", "38618901"],
    [20_000_000_000, "65353130", "77737706", "47863826"],
  ] as const;
  it("matches RFC 6238 SHA-1, SHA-256 and SHA-512 vectors", async () => {
    const secrets = {
      "SHA-1": utf8ToBytes("12345678901234567890"),
      "SHA-256": utf8ToBytes("12345678901234567890123456789012"),
      "SHA-512": utf8ToBytes(
        "1234567890123456789012345678901234567890123456789012345678901234",
      ),
    } as const;
    for (const [timestamp, sha1, sha256, sha512] of cases) {
      await expect(
        totp({
          secret: secrets["SHA-1"],
          timestamp,
          digits: 8,
          algorithm: "SHA-1",
        }),
      ).resolves.toBe(sha1);
      await expect(
        totp({
          secret: secrets["SHA-256"],
          timestamp,
          digits: 8,
          algorithm: "SHA-256",
        }),
      ).resolves.toBe(sha256);
      await expect(
        totp({
          secret: secrets["SHA-512"],
          timestamp,
          digits: 8,
          algorithm: "SHA-512",
        }),
      ).resolves.toBe(sha512);
    }
  });
  it("uses integer counters beyond 2038", () => {
    expect(totpCounter(20_000_000_000)).toBe(666_666_666n);
  });
  it("diagnoses a bounded clock delta", async () => {
    const secret = utf8ToBytes("12345678901234567890");
    const code = await totp({ secret, timestamp: 1_111_111_109 });
    const match = await verifyTotp(code, {
      secret,
      timestamp: 1_111_111_109 + 60,
      window: 3,
    });
    expect(match?.delta).toBe(-2);
  });
 });
@@ -0,0 +1,61 @@
 import { describe, expect, it } from "vitest";
 import { parseOtpAuth, serializeOtpAuth } from "../../src/otp/profile";
 describe("otpauth profiles", () => {
  it("parses and serializes a TOTP profile without losing extensions", () => {
    const parsed = parseOtpAuth(
      "otpauth://totp/Example:alice%40example.com?secret=JBSWY3DPEHPK3PXP&issuer=Example&algorithm=SHA256&digits=8&period=45&image=ignored",
    );
    expect(parsed.profile).toMatchObject({
      kind: "totp",
      issuer: "Example",
      account: "alice@example.com",
      algorithm: "SHA-256",
      digits: 8,
      period: 45,
    });
    expect(parsed.profile.extensions.get("image")).toBe("ignored");
    expect(serializeOtpAuth(parsed.profile)).toContain("image=ignored");
  });
  it("requires an HOTP counter and preserves 64-bit values", () => {
    expect(() =>
      parseOtpAuth("otpauth://hotp/Example?secret=JBSWY3DPEHPK3PXP"),
    ).toThrow(/counter/iu);
    const parsed = parseOtpAuth(
      "otpauth://hotp/Example?secret=JBSWY3DPEHPK3PXP&counter=18446744073709551615",
    );
    expect(parsed.profile.counter).toBe((1n << 64n) - 1n);
  });
  it("rejects duplicate known parameters", () => {
    expect(() =>
      parseOtpAuth(
        "otpauth://totp/Example?secret=JBSWY3DPEHPK3PXP&secret=JBSWY3DPEHPK3PXP",
      ),
    ).toThrow(/duplicate/iu);
  });
  it("rejects partially numeric parameters and unsafe labels", () => {
    expect(() =>
      parseOtpAuth(
        "otpauth://totp/Example?secret=JBSWY3DPEHPK3PXP&digits=6oops",
      ),
    ).toThrow(/integer/iu);
    const parsed = parseOtpAuth(
      "otpauth://totp/Example?secret=JBSWY3DPEHPK3PXP",
    );
    parsed.profile.account = "unsafe:label";
    expect(() => serializeOtpAuth(parsed.profile)).toThrow(/colon/iu);
  });
  it("warns without silently reconciling issuer mismatch", () => {
    const result = parseOtpAuth(
      "otpauth://totp/Display:alice?secret=JBSWY3DPEHPK3PXP&issuer=canonical.example",
    );
    expect(result.profile.issuer).toBe("canonical.example");
    expect(result.warnings.some(({ code }) => code === "issuer-mismatch")).toBe(
      true,
    );
  });
 });
@@ -0,0 +1,47 @@
 import { describe, expect, it } from "vitest";
 import {
  bytesToArrayBuffer,
  bytesToHex,
  utf8ToBytes,
 } from "../../src/crypto/encoding";
 import { encodeQr, qrSvg } from "../../src/qr/encoder";
 async function matrixHash(text: string): Promise<string> {
  const bits = encodeQr(text)
    .map((row) => row.map((value) => (value ? "1" : "0")).join(""))
    .join("");
  return bytesToHex(
    new Uint8Array(
      await crypto.subtle.digest(
        "SHA-256",
        bytesToArrayBuffer(utf8ToBytes(bits)),
      ),
    ),
  );
 }
 describe("QR encoder", () => {
  it("matches the reviewed reference matrices", async () => {
    await expect(matrixHash("Hello")).resolves.toBe(
      "ac69828947e29c188c38459b3eab69d0071aeedc825c41277d82ca3141033afe",
    );
    await expect(
      matrixHash(
        "otpauth://totp/Example:alice?secret=JBSWY3DPEHPK3PXP&issuer=Example",
      ),
    ).resolves.toBe(
      "d39d6eed126c0bc3ca92a851a062613e8cfa178adf9a8e2b3c399ba77cbb0187",
    );
  });
  it("emits a self-contained SVG with a quiet zone", () => {
    const svg = qrSvg("Hello");
    expect(svg).toMatch(/^<svg xmlns=/u);
    expect(svg).toContain("<rect");
    expect(svg).not.toContain("script");
  });
  it("rejects oversized values instead of allocating unbounded matrices", () => {
    expect(() => encodeQr("x".repeat(500))).toThrow(/version 10/iu);
  });
 });
@@ -0,0 +1,40 @@
 import { describe, expect, it } from "vitest";
 import { decodeCompleteCbor } from "../../src/webauthn/cbor";
 describe("bounded CBOR decoder", () => {
  it("decodes deterministic maps and byte strings", () => {
    const value = decodeCompleteCbor(
      Uint8Array.from([
        0xa2, 0x01, 0x42, 0xaa, 0xbb, 0x63, 0x66, 0x6d, 0x74, 0x64, 0x6e, 0x6f,
        0x6e, 0x65,
      ]),
    );
    expect(value).toBeInstanceOf(Map);
    expect((value as Map<unknown, unknown>).get("fmt")).toBe("none");
  });
  it("rejects indefinite, duplicate and trailing encodings", () => {
    expect(() => decodeCompleteCbor(Uint8Array.from([0x9f, 0xff]))).toThrow(
      /Indefinite/iu,
    );
    expect(() =>
      decodeCompleteCbor(Uint8Array.from([0xa2, 0x01, 0x01, 0x01, 0x02])),
    ).toThrow(/duplicate/iu);
    expect(() =>
      decodeCompleteCbor(
        Uint8Array.from([0xa2, 0x41, 0xaa, 0x01, 0x41, 0xaa, 0x02]),
      ),
    ).toThrow(/duplicate/iu);
    expect(() => decodeCompleteCbor(Uint8Array.from([0x01, 0x02]))).toThrow(
      /trailing/iu,
    );
  });
  it("enforces depth and item limits", () => {
    expect(() =>
      decodeCompleteCbor(
        Uint8Array.from([...Array.from({ length: 34 }, () => 0x81), 0x00]),
      ),
    ).toThrow(/deep/iu);
  });
 });
@@ -0,0 +1,56 @@
 import { describe, expect, it } from "vitest";
 import {
  bytesToArrayBuffer,
  bytesToBase64Url,
  utf8ToBytes,
 } from "../../src/crypto/encoding";
 import {
  parseAuthenticatorData,
  parseClientData,
 } from "../../src/webauthn/parser";
 describe("WebAuthn parsers", () => {
  it("parses collected client data without normalizing security fields", () => {
    const json = utf8ToBytes(
      JSON.stringify({
        type: "webauthn.get",
        challenge: "YWJj",
        origin: "https://example.test",
        crossOrigin: false,
      }),
    );
    expect(parseClientData(bytesToBase64Url(json))).toMatchObject({
      type: "webauthn.get",
      origin: "https://example.test",
    });
  });
  it("extracts flags and the unsigned signature counter", async () => {
    const rpHash = new Uint8Array(
      await crypto.subtle.digest(
        "SHA-256",
        bytesToArrayBuffer(utf8ToBytes("example.test")),
      ),
    );
    const bytes = Uint8Array.from([...rpHash, 0x05, 0x00, 0x00, 0x00, 0x09]);
    const parsed = parseAuthenticatorData(bytes);
    expect(parsed.flags).toMatchObject({
      userPresent: true,
      userVerified: true,
    });
    expect(parsed.signCount).toBe(9);
  });
  it("rejects inconsistent backup flags and undeclared trailing data", () => {
    expect(() =>
      parseAuthenticatorData(
        Uint8Array.from([...new Uint8Array(32), 0x10, 0, 0, 0, 0]),
      ),
    ).toThrow(/backup/iu);
    expect(() =>
      parseAuthenticatorData(
        Uint8Array.from([...new Uint8Array(32), 0x01, 0, 0, 0, 0, 0]),
      ),
    ).toThrow(/not described/iu);
  });
 });
@@ -0,0 +1,108 @@
 import { describe, expect, it } from "vitest";
 import {
  base64UrlToBytes,
  bytesToArrayBuffer,
  bytesToBase64Url,
  utf8ToBytes,
 } from "../../src/crypto/encoding";
 import { verifyAssertion } from "../../src/webauthn/verify";
 import type { CborValue } from "../../src/webauthn/cbor";
 function rawEcdsaToDer(raw: Uint8Array): Uint8Array {
  const integer = (part: Uint8Array): number[] => {
    let offset = 0;
    while (offset < part.length - 1 && part[offset] === 0) offset += 1;
    const value = [...part.slice(offset)];
    if (value[0]! & 0x80) value.unshift(0);
    return [0x02, value.length, ...value];
  };
  const r = integer(raw.slice(0, 32));
  const s = integer(raw.slice(32));
  return Uint8Array.from([0x30, r.length + s.length, ...r, ...s]);
 }
 describe("assertion verification", () => {
  it("checks ceremony bindings and a WebAuthn DER ECDSA signature", async () => {
    const pair = await crypto.subtle.generateKey(
      { name: "ECDSA", namedCurve: "P-256" },
      true,
      ["sign", "verify"],
    );
    const jwk = await crypto.subtle.exportKey("jwk", pair.publicKey);
    const challenge = bytesToBase64Url(
      crypto.getRandomValues(new Uint8Array(32)),
    );
    const origin = "https://auth.example.test";
    const rpId = "auth.example.test";
    const clientBytes = utf8ToBytes(
      JSON.stringify({
        type: "webauthn.get",
        challenge,
        origin,
        crossOrigin: false,
      }),
    );
    const rpHash = new Uint8Array(
      await crypto.subtle.digest(
        "SHA-256",
        bytesToArrayBuffer(utf8ToBytes(rpId)),
      ),
    );
    const authenticator = Uint8Array.from([...rpHash, 0x05, 0, 0, 0, 7]);
    const clientHash = new Uint8Array(
      await crypto.subtle.digest("SHA-256", bytesToArrayBuffer(clientBytes)),
    );
    const signed = Uint8Array.from([...authenticator, ...clientHash]);
    const rawSignature = new Uint8Array(
      await crypto.subtle.sign(
        { name: "ECDSA", hash: "SHA-256" },
        pair.privateKey,
        bytesToArrayBuffer(signed),
      ),
    );
    const cose = new Map<CborValue, CborValue>([
      [1, 2],
      [3, -7],
      [-1, 1],
      [-2, base64UrlToBytes(jwk.x!)],
      [-3, base64UrlToBytes(jwk.y!)],
    ]);
    const result = await verifyAssertion({
      clientDataJSON: bytesToBase64Url(clientBytes),
      authenticatorData: bytesToBase64Url(authenticator),
      signature: bytesToBase64Url(rawEcdsaToDer(rawSignature)),
      credentialPublicKey: cose,
      expectedChallenge: challenge,
      expectedOrigin: origin,
      expectedRpId: rpId,
      requireUserVerification: true,
      previousSignCount: 6,
    });
    expect(result.verified).toBe(true);
    expect(result.checks.every((check) => check.status !== "fail")).toBe(true);
  });
  it("fails expected origin independently", async () => {
    await expect(
      verifyAssertion({
        clientDataJSON: bytesToBase64Url(
          utf8ToBytes(
            JSON.stringify({
              type: "webauthn.get",
              challenge: "YQ",
              origin: "https://wrong.test",
            }),
          ),
        ),
        authenticatorData: bytesToBase64Url(
          Uint8Array.from([...new Uint8Array(32), 1, 0, 0, 0, 0]),
        ),
        signature: "",
        credentialPublicKey: "{}",
        expectedChallenge: "YQ",
        expectedOrigin: "https://right.test",
        expectedRpId: "right.test",
      }),
    ).resolves.toMatchObject({ verified: false });
  });
 });
@@ -0,0 +1,27 @@
 {
  "compilerOptions": {
    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
    "target": "ES2023",
    "lib": ["ES2023", "DOM", "DOM.Iterable", "WebWorker"],
    "module": "ESNext",
    "types": ["vite/client"],
    "allowArbitraryExtensions": true,
    "skipLibCheck": true,
    "moduleResolution": "Bundler",
    "allowImportingTsExtensions": true,
    "verbatimModuleSyntax": true,
    "moduleDetection": "force",
    "noEmit": true,
    "jsx": "react-jsx",
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "erasableSyntaxOnly": true,
    "noFallthroughCasesInSwitch": true,
    "strict": true,
    "noUncheckedIndexedAccess": true,
    "useDefineForClassFields": true,
    "resolveJsonModule": true,
    "isolatedModules": true
  },
  "include": ["src", "tests"]
 }
@@ -0,0 +1,7 @@
 {
  "files": [],
  "references": [
    { "path": "./tsconfig.app.json" },
    { "path": "./tsconfig.node.json" }
  ]
 }
@@ -0,0 +1,24 @@
 {
  "compilerOptions": {
    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
    "target": "ES2023",
    "lib": ["ES2023"],
    "module": "ESNext",
    "types": ["node"],
    "skipLibCheck": true,
    "moduleResolution": "Bundler",
    "allowImportingTsExtensions": true,
    "verbatimModuleSyntax": true,
    "moduleDetection": "force",
    "noEmit": true,
    "strict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true
  },
  "include": [
    "vite.config.ts",
    "playwright.config.ts",
    "eslint.config.mjs",
    "scripts/**/*.mjs"
  ]
 }
@@ -0,0 +1,16 @@
 /// <reference types="vitest/config" />
 import { defineConfig } from "vite";
 import react from "@vitejs/plugin-react";
 export default defineConfig({
  base: "./",
  plugins: [react()],
  worker: { format: "es" },
  test: {
    environment: "jsdom",
    setupFiles: "./src/test/setup.ts",
    css: true,
    restoreMocks: true,
    exclude: ["tests/browser/**", "node_modules/**", "dist/**"],
  },
 });
		`@@ -0,0 +1,2 @@`
							`@add-ideas:registry=https://git.add-ideas.de/api/packages/lotobo/npm/`
							`always-auth=false`
		`@@ -0,0 +1 @@`
							`export const APPLICATION_VERSION = "0.1.0";`