Files
govoplan/tests/test_security_audit_wrapper.py
Albrecht Degering 8b93bbc6b6
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ci: mount audit workspace safely
2026-07-23 00:30:28 +02:00

517 lines
18 KiB
Python

from __future__ import annotations
import json
import os
from pathlib import Path
import shutil
import subprocess
import tempfile
import textwrap
import unittest
META_ROOT = Path(__file__).resolve().parents[1]
AUDIT_SCRIPT = META_ROOT / "tools" / "checks" / "check-security-audit.sh"
CONTAINER_RUNNER = META_ROOT / "tools" / "checks" / "security-audit" / "run.sh"
class SecurityAuditWrapperTests(unittest.TestCase):
def setUp(self) -> None:
self._temporary_directory = tempfile.TemporaryDirectory()
self.temporary_root = Path(self._temporary_directory.name)
self.checkout = self.temporary_root / "checkout"
checks = self.checkout / "tools" / "checks"
checks.mkdir(parents=True)
shutil.copy2(AUDIT_SCRIPT, checks / AUDIT_SCRIPT.name)
(self.checkout / "README.md").write_text("audit fixture\n", encoding="utf-8")
subprocess.run(["git", "init", "-q", str(self.checkout)], check=True)
subprocess.run(
[
"git",
"-C",
str(self.checkout),
"config",
"user.email",
"audit@example.invalid",
],
check=True,
)
subprocess.run(
["git", "-C", str(self.checkout), "config", "user.name", "Audit Test"],
check=True,
)
subprocess.run(["git", "-C", str(self.checkout), "add", "."], check=True)
subprocess.run(
["git", "-C", str(self.checkout), "commit", "-qm", "audit fixture"],
check=True,
)
self.stub_bin = self.temporary_root / "bin"
self.stub_bin.mkdir()
self._write_stub(
"semgrep",
r"""
if [[ " $* " == *" --version "* ]]; then
echo 'semgrep stub 1.0'
exit 0
fi
if [[ " $* " != *" --error "* ]]; then
echo 'missing --error' >&2
exit 3
fi
output=''
while [[ $# -gt 0 ]]; do
if [[ "$1" == '--output' ]]; then
output="$2"
shift 2
else
shift
fi
done
case "${STUB_SEMGREP_REPORT:-valid}" in
valid)
printf '%s\n' '{"version":"2.1.0","runs":[]}' > "$output"
;;
malformed)
printf '%s\n' '{' > "$output"
;;
invalid-sarif)
printf '%s\n' '{}' > "$output"
;;
missing)
;;
esac
if [[ -n "${STUB_MUTATE_PATH:-}" ]]; then
printf '%s\n' 'changed during audit' >> "$STUB_MUTATE_PATH"
fi
exit "${STUB_SEMGREP_EXIT:-0}"
""",
)
self._write_stub(
"gitleaks",
r"""
if [[ "${1:-}" == '--version' || "${1:-}" == 'version' ]]; then
echo 'gitleaks stub 1.0'
exit 0
fi
if [[ "${1:-}" == 'git' && "${2:-}" == '--help' ]]; then
exit 0
fi
output=''
while [[ $# -gt 0 ]]; do
if [[ "$1" == '--report-path' ]]; then
output="$2"
shift 2
else
shift
fi
done
mkdir -p "$(dirname "$output")"
printf '%s\n' '[]' > "$output"
exit "${STUB_GITLEAKS_EXIT:-0}"
""",
)
for tool in ("bandit", "ruff"):
self._write_stub(
tool,
f"""
if [[ " $* " == *" --version "* ]]; then
echo '{tool} stub 1.0'
fi
exit 0
""",
)
def tearDown(self) -> None:
self._temporary_directory.cleanup()
def _write_stub(self, name: str, body: str) -> None:
path = self.stub_bin / name
path.write_text(
"#!/usr/bin/env bash\nset -euo pipefail\n" + textwrap.dedent(body).lstrip(),
encoding="utf-8",
)
path.chmod(0o755)
def _install_full_mode_stubs(self) -> None:
self._write_stub(
"trivy",
r"""
if [[ " $* " == *" --version "* ]]; then
echo 'trivy stub 1.0'
exit 0
fi
output=''
while [[ $# -gt 0 ]]; do
if [[ "$1" == '--output' ]]; then
output="$2"
shift 2
else
shift
fi
done
printf '%s\n' '{"version":"2.1.0","runs":[]}' > "$output"
""",
)
self._write_stub(
"osv-scanner",
r"""
if [[ " $* " == *" --version "* ]]; then
echo 'osv-scanner stub 1.0'
exit 0
fi
if [[ " $* " == *" scan --help "* ]]; then
exit 0
fi
output=''
while [[ $# -gt 0 ]]; do
if [[ "$1" == '--output-file' ]]; then
output="$2"
shift 2
else
shift
fi
done
printf '{"results": %s}\n' "${STUB_OSV_RESULTS:-null}" > "$output"
""",
)
self._write_stub(
"jscpd",
r"""
if [[ " $* " == *" --version "* ]]; then
echo 'jscpd stub 1.0'
exit 0
fi
output=''
while [[ $# -gt 0 ]]; do
if [[ "$1" == '--output' ]]; then
output="$2"
shift 2
else
shift
fi
done
mkdir -p "$output"
printf '%s\n' '{"duplicates":[],"statistics":{}}' > "$output/jscpd-report.json"
""",
)
for tool in ("pip-audit", "npm", "radon", "xenon"):
self._write_stub(
tool,
f"""
if [[ " $* " == *" --version "* ]]; then
echo '{tool} stub 1.0'
exit 0
fi
exit 0
""",
)
def _run(
self, *arguments: str, mode: str = "quick", **environment: str
) -> tuple[subprocess.CompletedProcess[str], Path]:
reports = self.temporary_root / "reports"
env = os.environ.copy()
env.update(
{
"PATH": f"{self.stub_bin}:{env['PATH']}",
"SECURITY_AUDIT_REQUIRE_TOOLS": "1",
"SECURITY_AUDIT_TOOLBOX_FINGERPRINT": 'stub-"safe',
**environment,
}
)
result = subprocess.run(
[
"bash",
str(self.checkout / "tools" / "checks" / AUDIT_SCRIPT.name),
"--mode",
mode,
"--scope",
"current",
"--reports-dir",
str(reports),
*arguments,
],
cwd=self.checkout,
env=env,
check=False,
capture_output=True,
text=True,
)
return result, reports
@staticmethod
def _manifest(reports: Path) -> dict[str, object]:
return json.loads((reports / "manifest.json").read_text(encoding="utf-8"))
def test_report_only_findings_are_nonfatal_and_strict_findings_fail(self) -> None:
result, reports = self._run("--report-only", STUB_SEMGREP_EXIT="1")
self.assertEqual(0, result.returncode, result.stderr)
manifest = self._manifest(reports)
self.assertEqual(0, manifest["overall_status"])
self.assertEqual(1, manifest["finding_status"])
self.assertEqual(0, manifest["execution_error_status"])
self.assertIn(
"Semgrep SAST\t1\tfindings", (reports / "step-status.tsv").read_text()
)
strict_result, strict_reports = self._run("--strict", STUB_SEMGREP_EXIT="1")
self.assertEqual(1, strict_result.returncode)
self.assertEqual(1, self._manifest(strict_reports)["overall_status"])
def test_scanner_execution_error_is_fatal_in_report_only_mode(self) -> None:
result, reports = self._run("--report-only", STUB_SEMGREP_EXIT="2")
self.assertEqual(1, result.returncode)
manifest = self._manifest(reports)
self.assertEqual(1, manifest["overall_status"])
self.assertEqual(1, manifest["execution_error_status"])
self.assertIn(
"Semgrep SAST\t2\texecution-error",
(reports / "step-status.tsv").read_text(),
)
def test_malformed_or_missing_machine_report_is_fatal(self) -> None:
for report_kind in ("malformed", "invalid-sarif", "missing"):
with self.subTest(report_kind=report_kind):
result, reports = self._run(
"--report-only",
STUB_SEMGREP_REPORT=report_kind,
)
self.assertEqual(1, result.returncode)
manifest = self._manifest(reports)
self.assertEqual(1, manifest["execution_error_status"])
if report_kind == "missing":
self.assertIn("semgrep.sarif", manifest["missing_reports"])
self.assertIn(
"Validate machine-readable audit reports\t2\texecution-error",
(reports / "step-status.tsv").read_text(),
)
def test_osv_null_results_are_valid_but_wrong_shapes_fail(self) -> None:
self._install_full_mode_stubs()
result, reports = self._run("--report-only", mode="full")
self.assertEqual(0, result.returncode, result.stderr)
osv_report = json.loads(
(reports / "osv-scanner-checkout.json").read_text(encoding="utf-8")
)
self.assertIsNone(osv_report["results"])
invalid_result, invalid_reports = self._run(
"--report-only",
mode="full",
STUB_OSV_RESULTS="{}",
)
self.assertEqual(1, invalid_result.returncode)
self.assertIn(
"invalid OSV-Scanner report",
invalid_result.stderr,
)
self.assertEqual(1, self._manifest(invalid_reports)["execution_error_status"])
def test_workspace_mutation_invalidates_the_audit(self) -> None:
result, reports = self._run(
"--report-only",
STUB_MUTATE_PATH=str(self.checkout / "README.md"),
)
self.assertEqual(1, result.returncode)
manifest = self._manifest(reports)
self.assertFalse(manifest["workspace_unchanged"])
self.assertEqual(1, manifest["overall_status"])
self.assertNotEqual(
(reports / "workspace-state-start.tsv").read_text(),
(reports / "workspace-state-end.tsv").read_text(),
)
def test_manifest_and_checksums_cover_only_current_run_reports(self) -> None:
reports = self.temporary_root / "reports"
reports.mkdir()
(reports / "stale-malformed.json").write_text("{", encoding="utf-8")
result, reports = self._run("--report-only")
self.assertEqual(0, result.returncode, result.stderr)
manifest = self._manifest(reports)
self.assertEqual('stub-"safe', manifest["toolbox_fingerprint"])
self.assertNotIn("stale-malformed.json", manifest["reports"])
self.assertEqual([], manifest["missing_reports"])
checksums = (reports / "report-sha256.txt").read_text(encoding="utf-8")
self.assertNotIn("stale-malformed.json", checksums)
verification = subprocess.run(
["sha256sum", "--check", "report-sha256.txt"],
cwd=reports,
check=False,
capture_output=True,
text=True,
)
self.assertEqual(0, verification.returncode, verification.stderr)
checksummed_paths = {
line.split(" ", 1)[1] for line in checksums.splitlines() if " " in line
}
self.assertEqual(set(manifest["reports"]), checksummed_paths)
class SecurityAuditContainerRunnerTests(unittest.TestCase):
def setUp(self) -> None:
self._temporary_directory = tempfile.TemporaryDirectory(
prefix="govoplan-audit-runner-"
)
root = Path(self._temporary_directory.name)
self.stub_bin = root / "bin"
self.stub_bin.mkdir()
self.docker_log = root / "docker.jsonl"
docker_stub = self.stub_bin / "docker"
docker_stub.write_text(
textwrap.dedent(
"""\
#!/usr/bin/env python3
import json
import os
from pathlib import Path
import sys
arguments = sys.argv[1:]
with Path(os.environ["DOCKER_STUB_LOG"]).open(
"a", encoding="utf-8"
) as handle:
handle.write(json.dumps(arguments) + "\\n")
if arguments and arguments[0] == "version":
print("26.1.0")
if arguments[:2] == ["container", "inspect"]:
print(os.environ["DOCKER_STUB_MOUNTS"])
"""
),
encoding="utf-8",
)
docker_stub.chmod(0o755)
self.environment = os.environ.copy()
self.environment.update(
{
"DOCKER_STUB_LOG": str(self.docker_log),
"DOCKER_STUB_MOUNTS": "[]",
"PATH": f"{self.stub_bin}:{self.environment['PATH']}",
}
)
def tearDown(self) -> None:
self._temporary_directory.cleanup()
def _run(
self,
*,
scope: str,
actions_mounts: object | None = None,
) -> tuple[subprocess.CompletedProcess[str], list[list[str]]]:
self.docker_log.write_text("", encoding="utf-8")
environment = self.environment.copy()
if actions_mounts is None:
environment.pop("GITEA_ACTIONS", None)
else:
environment["GITEA_ACTIONS"] = "true"
environment["DOCKER_STUB_MOUNTS"] = json.dumps(actions_mounts)
result = subprocess.run(
[
"bash",
str(CONTAINER_RUNNER),
"--mode",
"quick",
"--scope",
scope,
],
cwd=META_ROOT,
env=environment,
check=False,
capture_output=True,
text=True,
)
commands = [
json.loads(line)
for line in self.docker_log.read_text(encoding="utf-8").splitlines()
]
return result, commands
def test_gitea_job_shares_only_its_workspace_mount(self) -> None:
mounts = [
{
"Type": "bind",
"Source": "/var/run/docker.sock",
"Destination": "/var/run/docker.sock",
"RW": True,
},
{
"Type": "volume",
"Name": "govoplan-actions-workspace",
"Destination": str(META_ROOT.parent),
"RW": True,
},
{
"Type": "volume",
"Name": "govoplan-actions-environment",
"Destination": "/var/run/act",
"RW": True,
},
]
container_id = subprocess.run(
["hostname"],
check=True,
capture_output=True,
text=True,
).stdout.strip()
for scope in ("current", "govoplan"):
with self.subTest(scope=scope):
result, commands = self._run(scope=scope, actions_mounts=mounts)
self.assertEqual(0, result.returncode, result.stderr)
run_command = next(
command for command in commands if command[0] == "run"
)
inspect_command = next(
command
for command in commands
if command[:2] == ["container", "inspect"]
)
self.assertEqual(container_id, inspect_command[-1])
mount_index = run_command.index("--mount")
self.assertEqual(
(
"type=volume,source=govoplan-actions-workspace,"
f"target={META_ROOT.parent}"
),
run_command[mount_index + 1],
)
self.assertNotIn("--volumes-from", run_command)
self.assertNotIn("-v", run_command)
self.assertNotIn("/var/run/docker.sock", " ".join(run_command))
self.assertNotIn("/var/run/act", " ".join(run_command))
repository_roots = [
value
for value in run_command
if value.startswith("GOVOPLAN_REPOS_ROOT=")
]
expected_roots = (
[f"GOVOPLAN_REPOS_ROOT={META_ROOT.parent}"]
if scope == "govoplan"
else []
)
self.assertEqual(expected_roots, repository_roots)
def test_non_actions_runner_keeps_the_scoped_bind_mount(self) -> None:
result, commands = self._run(scope="govoplan")
self.assertEqual(0, result.returncode, result.stderr)
run_command = next(command for command in commands if command[0] == "run")
bind_index = run_command.index("-v")
self.assertEqual(
f"{META_ROOT.parent}:/workspace",
run_command[bind_index + 1],
)
self.assertNotIn("--mount", run_command)
if __name__ == "__main__":
unittest.main()