Replace metacrypt's hand-rolled gRPC interceptor chain with the mcdsl
grpcserver package, which provides TLS setup, logging, and method-map
auth (public/auth-required/admin-required) out of the box.
Metacrypt-specific interceptors are preserved as hooks:
- sealInterceptor runs as a PreInterceptor (before logging/auth)
- auditInterceptor runs as a PostInterceptor (after auth)
The three legacy method maps (seal/auth/admin) are restructured into
mcdsl's MethodMap (Public/AuthRequired/AdminRequired) plus a separate
seal-required map for the PreInterceptor. Token context is now stored
via mcdsl/auth.ContextWithTokenInfo instead of a package-local key.
Bumps mcdsl from v1.0.0 to v1.0.1 (adds PreInterceptors/PostInterceptors
to grpcserver.Options).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add complete transit engine supporting symmetric encryption (AES-256-GCM,
XChaCha20-Poly1305), asymmetric signing (Ed25519, ECDSA P-256/P-384),
and HMAC (SHA-256/SHA-512) with versioned key rotation, min decryption
version enforcement, key trimming, batch operations, and rewrap.
Includes proto definitions, gRPC handlers, REST routes, and comprehensive
tests covering all 18 operations, auth enforcement, and edge cases.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
