feat(tee): SPIFFE/SPIRE Workload API client with graceful fallback - #228
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Fetches X.509 SVIDs from a local SPIRE agent after TEE attestation. Falls back to self-signed TLS with a WARNING log if SPIRE is unavailable or pyspiffe is not installed. GatewayContext gains a `spiffe` field populated during startup step 5b (non-fatal). Closes #96 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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) Fetches X.509 SVIDs from a local SPIRE agent after TEE attestation. Falls back to self-signed TLS with a WARNING log if SPIRE is unavailable or pyspiffe is not installed. GatewayContext gains a `spiffe` field populated during startup step 5b (non-fatal). Closes #96 Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
src/cmcp_gateway/tee/spiffe.py: fetches X.509 SVIDs from a local SPIRE Workload API agent (pyspiffe) conditioned on TEE attestation; falls back to self-signed TLS with a WARNING log if SPIRE is unreachable or pyspiffe is not installedmake_self_signed_tls_context(): generates an Ed25519 self-signed cert whose CN encodes the first 16 hex chars of the gateway signing key, binding network identity to the TEE measurementsrc/cmcp_gateway/startup.py: step 5b after catalog load; populatesGatewayContext.spiffe(non-fatal — gateway still starts without SPIRE)Test plan
pytest tests/unit/test_spiffe.py -v— 14 passed, 1 skipped (Windows:AF_UNIXcheck is a no-op there)pytest tests/unit/ -q— 363 passed, 1 skippedCloses #96
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