# Crypto Tools

Inspect keys, certificates and signatures locally in the browser.

Crypto Tools is a standalone local-first application in the [add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal). Inputs are processed in the browser and are not uploaded.

## Version 0.1 scope

- Bounded PEM and DER inspection for X.509 certificates, CSRs and CRLs
- Identification and fingerprinting of public/private PEM key material without decryption
- JWK/JWKS inspection, private-member warnings and RFC 7638 SHA-256 thumbprints
- Explicit issuer-certificate signature links and DNS SAN hostname checks
- A local JSON inspection report with an explicit non-trust model

This is inspection, not complete RFC 5280 path validation, certificate trust, revocation checking, issuance, key generation or general signature verification. Inputs are bounded to 8 MiB and 256 PEM blocks. See [docs/ARCHITECTURE.md](docs/ARCHITECTURE.md) and [docs/PRIVACY-SECURITY.md](docs/PRIVACY-SECURITY.md).

## Development

Requires Node.js 22 and npm 11.

```sh
npm ci
npm run check
npm run test:browser
```

## Release

`npm run release:artifact` creates a deterministic `release/crypto-tools-0.1.0.zip` and checksum sidecar.

## Licence

GPL-3.0-or-later. Runtime dependencies retain their own licences; see [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md).