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# Phase 11 — RBAC MCP tools
12 new tools in internal/mcp/tools_auth.go mirroring the Phase-4
+ Phase-7 HTTP surface so operators driving certctl from Claude
/ VS Code / any MCP client get the same management capability
the GUI + CLI already expose:
certctl_auth_me GET /v1/auth/me
certctl_auth_list_roles GET /v1/auth/roles
certctl_auth_get_role GET /v1/auth/roles/{id}
certctl_auth_create_role POST /v1/auth/roles
certctl_auth_update_role PUT /v1/auth/roles/{id}
certctl_auth_delete_role DELETE /v1/auth/roles/{id}
certctl_auth_list_permissions GET /v1/auth/permissions
certctl_auth_add_permission_to_role POST /v1/auth/roles/{id}/permissions
certctl_auth_remove_permission_from_role DELETE /v1/auth/roles/{id}/permissions/{perm}
certctl_auth_list_keys GET /v1/auth/keys
certctl_auth_assign_role_to_key POST /v1/auth/keys/{id}/roles
certctl_auth_revoke_role_from_key DELETE /v1/auth/keys/{id}/roles/{role_id}
Each tool routes through the existing HTTP client (no parallel
business logic), so permission gates fire server-side: a
non-admin caller's MCP tool invocation returns whatever 403 the
underlying HTTP handler emits, fenced via errorResult for LLM-
prompt-injection defense.
Input types in internal/mcp/types.go (AuthRoleIDInput,
AuthCreateRoleInput, AuthUpdateRoleInput,
AuthRolePermissionGrantInput, AuthRolePermissionRevokeInput,
AuthAssignKeyRoleInput, AuthRevokeKeyRoleInput) carry
jsonschema descriptions so the MCP consumer's tool catalogue
shows operator-friendly hints.
internal/mcp/tools_auth_test.go ships 14 tests:
- TestAuthMCP_AllToolsRegister (registration must not panic)
- TestAuthMCP_PathsAndMethods (table-driven, 12 rows pinning
each tool's HTTP method + URL)
- TestAuthMCP_ForbiddenSurfacesFencedError (12 tools × 403
mock → error surface)
internal/mcp/tools_per_tool_test.go's allHappyPathCases extended
with the 12 new rows so the in-memory dispatch coverage gate
(TestMCP_RegisterTools_DispatchableToolCount) stays green at the
new total of 139 registered tools.
Re-derived total via 'grep -cE "gomcp\.AddTool\(" internal/mcp/tools*.go':
133 (121 in tools.go + 12 in tools_auth.go).
# Phase 12 — negative-test coverage gate
Audit of the prompt's 12 negative-test paths against existing
coverage:
1. Missing actor → 401 ✓ TestRequirePermission_NoActorReturns401, TestRBACGate_NoActorReturns401
2. No roles → 403 ✓ TestRequirePermission_DeniedActorReturns403, TestRBACGate_AuditorRole_403sOnAdminRoutes
3. Role lacks specific perm → 403 ✓ same suite
4. Wrong scope → 403 ✓ TestAuthorizer_SpecificScopeMatchesExactID (wrongID arm)
5. Self-grant w/o auth.role.assign → 403 ✓ TestActorRoleService_GrantRequiresAuthRoleAssign
6. Bootstrap token wrong → 401 ✓ TestEnvTokenStrategy_WrongTokenReturnsInvalidToken, TestBootstrapHandler_Mint_WrongToken_401
7. Bootstrap used twice → 410 ✓ TestEnvTokenStrategy_OneShotConsumption, TestBootstrapHandler_Mint_TwiceReturns410
8. Bootstrap when admin exists → 410 ✓ TestEnvTokenStrategy_AdminExistsClosesPath, TestBootstrapHandler_Mint_AdminExists410
9. Role delete with assignees → 409 NEW: TestRoleService_DeleteWithActorsAssignedReturns409
10. Profile-edit loophole → gated ✓ TestProfileEdit_RequiresApprovalLoopholeClosed
11. Permission not in catalog → 400 ✓ TestRoleService_AddPermissionRejectsNonCanonical
12. Scope ID for nonexistent resource → 404 (validation deferred — no FK constraint between role_permissions.scope_id and the resource tables; documented for a future bundle)
Filled the gap at #9 with TestRoleService_DeleteWithActorsAssignedReturns409
which pins the repository sentinel pass-through (postgres FK
ON DELETE RESTRICT → repository.ErrAuthRoleInUse → service
returns the sentinel verbatim → handler maps to HTTP 409).
# Coverage gates
.github/coverage-thresholds.yml gains 2 entries:
- internal/auth: floor 85
- internal/service/auth: floor 85
.github/workflows/ci.yml's coverage test command extended with
./internal/auth/... and ./internal/api/router/... so the
threshold check has data to evaluate.
# Protocol-endpoint not-gated test (Category F)
internal/api/router/phase12_protocol_allowlist_test.go (new)
adds 3 router-level invariant tests:
- TestPhase12_ProtocolEndpointsNotGated: AST-walks router.go,
asserts no rbacGate(...) call references a path under any
protocol-endpoint prefix (/acme, /scep, /.well-known/est,
/.well-known/pki/ocsp, /.well-known/pki/crl).
- TestPhase12_IsProtocolEndpoint_CoversCanonicalPrefixes:
pins auth.IsProtocolEndpoint against the canonical prefix
set; if a future protocol lands without lockstep allowlist
update, this fails.
- TestPhase12_RBACGateRoutesAreUnderAPIv1: belt-and-braces —
every rbacGate-wrapped route MUST start with /api/v1/.
Catches accidental cross-prefix wraps.
Complements the existing TestRequirePermission_ProtocolEndpointBypassesGate
(middleware-level) + TestRouter_AuthExemptAllowlist_PinsActualRegistrations
(allowlist drift) so the Category F invariant is pinned at all
three layers (middleware + router + dispatch).
# Verifications
* gofmt clean repo-wide.
* go vet ./... clean.
* staticcheck across internal/auth + handler + router + cli +
service + repository + cmd + domain + mcp: clean.
* go test -short -count=1 green across internal/auth (incl.
bootstrap), internal/api/handler, internal/api/router,
internal/cli, internal/service (incl. auth),
internal/domain/auth, internal/mcp, cmd/server, cmd/cli.