ProofedMesh/services/verification-service/internal/store/memory.go
CTO (Paperclip) 0ae29ae342
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verification-service: Phase-1 two-stage chain verifier (approval -> transform) (DEV-612)
Adds services/verification-service exposing POST /api/v1/verify/chain
for sink:dummy-sink. The handler runs the six hard-coded chain checks
described in DEV-612 and reserves decision_id in a new
`verification_decisions` table so a replayed sink delivery is refused
without recomputing signatures.

- DSSE signature verification against configurable approval + transform
  signer key_ids, loaded from VERIFICATION_SIGNER_KEYS (pem/hex/b64/b64u)
- RFC 6962 inclusion-proof verifier (shared leaf/node hashing with
  services/transparency-log/pkg/backend)
- Content binding: subject.digest.sha256 must match predicate.content_hash
  (approval) and request.payload_hash (transform)
- Hard-coded coverage of allowed_transformations / allowed_sinks /
  expires_at predicates (OPA deferred to Phase 2 per the subtask)
- Replay guard via new db/trust/migrations/0005_verification_decisions
  (in-memory store ships; Postgres skeleton mirrors sibling pattern)
- Dockerfile mirrors signing-service pattern (distroless static + nonroot)
- README documents endpoint, reason-code taxonomy, required predicate
  fields, and the Phase-2 non-scope

Tests: happy path + 7 negatives (bad signature, missing inclusion proof,
hash drift, sink not allowed, expired, replay, operation not allowed).

Co-Authored-By: Paperclip <noreply@paperclip.ing>
2026-10-25 20:35:35 +00:00

37 lines
872 B
Go

package store
import (
"context"
"sync"
)
// Memory is the Phase-1 in-process Store. Thread-safe via a single mutex.
type Memory struct {
mu sync.Mutex
decisions map[string]Decision
}
// NewMemory returns an empty Memory store.
func NewMemory() *Memory {
return &Memory{decisions: map[string]Decision{}}
}
// Reserve inserts d.DecisionID → d. On duplicate it returns ErrReplay
// and leaves the stored row untouched.
func (m *Memory) Reserve(_ context.Context, d Decision) error {
m.mu.Lock()
defer m.mu.Unlock()
if _, exists := m.decisions[d.DecisionID]; exists {
return ErrReplay
}
m.decisions[d.DecisionID] = d
return nil
}
// Get returns the stored decision, if any.
func (m *Memory) Get(_ context.Context, decisionID string) (Decision, bool, error) {
m.mu.Lock()
defer m.mu.Unlock()
d, ok := m.decisions[decisionID]
return d, ok, nil
}