feat: implement Level 1/2 conformance tests (#8)#14
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Level 1: six tests covering signed EAT envelope structure, Ed25519 signature verification via TR-SIG, tamper detection (byte-flipped signature, swapped cnf.jwk key), and nonce binding to the challenge. Fixtures in conftest.py generate a fresh Ed25519 key pair and produce a validly-signed cmcp-runtime record per test run. Level 2: five tests marked xfail(strict=False) with software-only fixture data covering measurement binding, mismatch detection, attestation report freshness, platform agreement, and cnf key sealing. Full Level 2 verification requires hardware TEE access; see module docstring for what a CI runner would need to promote these from xfail to strict. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
xfail(strict=False): measurement binding, mismatch detection, attestation report freshness, platform agreement, and cnf key sealing in TEE measurementsigned_eat_fixture,challenge_nonce,trust_record,attestation_report— all fixtures generate fresh Ed25519 keys per run with no static key materialLevel 2 uses
software-onlyplatform fixtures; full hardware TEE verification would require a live attestation verifier and an in-scope TEE quote. The module docstring details what a hardware-capable CI runner would need to promote those tests from xfail to strict.Closes #8.
Test plan
python -m pytest tests/ -vpasses with 86 passed, 5 xpassed, 0 failures🤖 Generated with Claude Code