fix(tap): add auth to createTAPSessionRoute + fix totalTimeMs calculation#56
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…tion Security fix: - POST /v1/sessions/tap had zero authentication — any caller could create TAP sessions for arbitrary agents by supplying any agent_id in the body, completely bypassing the trust model - Add validateTAPAppAccess(c, true) as the first thing in the route handler - Verify agent.app_id matches the authenticated app (prevents cross-app sessions) - Verify JWT agent_id matches body agent_id when present (prevents agent A from opening sessions as agent B) - Allow app-level tokens (no agent_id in JWT) to still work for any agent in the same app (backward-compatible with challenge-verified tokens) Timing fix: - hybrid.issuedAt was captured AFTER two async sub-challenge KV writes (~300-600ms), causing totalTimeMs < speed.solveTimeMs in verify response — physically impossible math visible to every agent caller - Capture issuedAt = Date.now() before generateSpeedChallenge() / generateReasoningChallenge() calls so totalTimeMs correctly reflects the full elapsed wall-clock time Tests: - 5 new auth enforcement tests: 401 no-token, 401 bad-token, 403 cross-app, 403 agent_id mismatch, allow app-level token - 2 new timing invariant tests: totalTimeMs >= speed.solveTimeMs, totalTimeMs >= reasoning.solveTimeMs - Updated createTAPSessionRoute beforeEach to set up auth mocks so all 57 existing + new tests pass 57 tests pass, 0 failures
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What
Two bugs found and fixed during weekly agent exploration sprint.
🚨 Security Fix —
createTAPSessionRoutehas no authentication (BUGS.md #7)Severity: CRITICAL — full authentication bypass
POST /v1/sessions/taphad zero authentication. Any unauthenticated caller could create TAP sessions for any agent by supplying an arbitraryagent_idin the request body. Thetap_enabledgate was enforced, but anyone could reach it.Fix:
validateTAPAppAccess(c, true)as the first thing in the route — same pattern used by all other TAP routesagent.app_id === appAccess.appId(prevents cross-app session creation)appAccess.agentId === agent.agent_idwhen the JWT carries an agent-specific identity (prevents agent A creating sessions as agent B)agent_idin JWT) remain backward-compatible — they can create sessions for any agent in their app🐛 Timing Fix —
totalTimeMs < speed.solveTimeMsin hybrid verify responsehybrid.issuedAtwas captured after two async KV writes (generateSpeedChallenge+generateReasoningChallenge), which take ~300-600ms on production Workers KV. This caused:Fix: Capture
issuedAt = Date.now()before the async sub-challenge generation calls. NowtotalTimeMscorrectly reflects the full elapsed wall-clock time seen by the caller.Tests
5 new auth enforcement tests:
2 new timing invariant tests:
totalTimeMs >= speed.solveTimeMstotalTimeMs >= reasoning.solveTimeMsUpdated:
createTAPSessionRoutedescribebeforeEachnow sets up auth mocks so all 57 existing + new tests pass.57 tests pass, 0 failures.
Closes