refactor(handler): split auth_session_oidc.go by handler-section (Phase 9, 11 of N)

Phase 9 ARCH-M2 closure Sprint 11. Splits
internal/api/handler/auth_session_oidc.go (was 1577 LOC, the
fifth-largest backend hotspot from the original audit) via the
Option B sibling-file pattern — new files stay in `package handler`
so every external caller of
`handler.AuthSessionOIDCHandler.{LoginInitiate, LoginCallback,
BackChannelLogout, Logout, ListSessions, RevokeSession,
RevokeAllExceptCurrent, ListProviders, CreateProvider,
UpdateProvider, DeleteProvider, TestProvider, RefreshProvider,
ListGroupMappings, AddGroupMapping, RemoveGroupMapping}` and
`handler.{DefaultBCLVerifier, NewDefaultBCLVerifier,
DefaultBCLVerifierMaxAge}` resolves the same way. Pure mechanical
relocation; no signature, no behavior, no import-graph change.

Section-based split (Option B + audit's verb prescription)
==========================================================
The audit's Tasks-Deferred row prescribed splitting "per handler
verb (login / callback / refresh / logout / backchannel)." The
file itself documents a three-section layout in its package
doc-comment:

  1. Public OIDC handshake (auth-exempt)
  2. Session management (RBAC-gated)
  3. OIDC provider + group-mapping CRUD (RBAC-gated)

Going strictly verb-by-verb would have:
  - mis-grouped RefreshProvider (which is an ADMIN op on a
    provider's signing-key cache, not a session refresh — same
    auth.oidc.edit permission as Update/Delete);
  - split LoginInitiate + LoginCallback into separate files
    despite them sharing the state cookie + pre-login row flow;
  - left the other 9 handlers (Sessions, Provider CRUD, Group
    Mappings) with no obvious home.

Sprint 11 follows the file's own self-described section split
plus a fourth file for the DefaultBCLVerifier, which the original
file already kept under a separate banner.

What moved
==========

New `internal/api/handler/auth_session_oidc_handshake.go` (391 LOC)
— Section 1 / Public OIDC handshake handlers (auth-exempt):
  - LoginInitiate (GET /auth/oidc/login?provider=<id>)
  - LoginCallback (GET /auth/oidc/callback?code=...&state=...)
  - BackChannelLogout (POST /auth/oidc/back-channel-logout)
  - Logout (POST /auth/logout)

New `internal/api/handler/auth_session_oidc_sessions.go` (208 LOC)
— Section 2 / Session-management handlers (RBAC-gated):
  - sessionResponse projection type + sessionToResponse mapper
  - ListSessions (GET /api/v1/auth/sessions)
  - RevokeSession (DELETE /api/v1/auth/sessions/{id})
  - RevokeAllExceptCurrent
    (DELETE /api/v1/auth/sessions/all-except-current)

New `internal/api/handler/auth_session_oidc_crud.go` (470 LOC) —
Section 3 / OIDC provider + group-mapping CRUD (RBAC-gated):
  - oidcProviderResponse + oidcProviderRequest projection types,
    providerToResponse mapper
  - ListProviders / CreateProvider / UpdateProvider /
    DeleteProvider / TestProvider / RefreshProvider
  - groupMappingResponse + groupMappingRequest projection types,
    mappingToResponse mapper
  - ListGroupMappings / AddGroupMapping / RemoveGroupMapping

New `internal/api/handler/auth_session_oidc_bcl.go` (225 LOC) —
DefaultBCLVerifier (handler's default implementation of the
BackChannelLogoutVerifier interface declared in
auth_session_oidc.go):
  - DefaultBCLVerifierMaxAge constant
  - DefaultBCLVerifier struct + NewDefaultBCLVerifier
  - WithMaxAge builder
  - Verify (the OpenID Connect Back-Channel Logout 1.0 §2.6
    verification: events claim, iat window, algorithm allowlist,
    audience match, sub/sid/jti decode)
  - peekIssuer unexported helper

What stays in auth_session_oidc.go (452 LOC, down from 1577)
============================================================
  - Package + import block.
  - Service-layer interface projections (OIDCAuthHandshaker,
    SessionMinter, BackChannelLogoutVerifier) — declared once and
    consumed by every section.
  - SessionCookieAttrs config struct.
  - AuthSessionOIDCHandler struct + permissionChecker /
    BCLReplayConsumer / AuditRecorder interfaces + NewAuthSession-
    OIDCHandler constructor + the WithPermissionChecker /
    WithBCLReplayConsumer builder methods.
  - The shared helpers consumed across multiple sections:
    encryptClientSecret, recordAudit, clearPreLoginCookie,
    clearSessionCookies, clientIPFromRequest, classifyOIDCFailure,
    randomB64URLForHandler, defaultIfBlank, defaultIntIfZero.

Side-effect import cleanup
==========================
Four imports drop from auth_session_oidc.go as a clean side effect
of the cut:
  - "encoding/json" (used only in CRUD + BCL — moved out)
  - "fmt" (used only in BCL — moved out)
  - gooidc "github.com/coreos/go-oidc/v3/oidc"
    (used only in BCL — moved out)
  - oidcdomain "github.com/certctl-io/certctl/internal/auth/oidc/domain"
    (used in handshake + CRUD + BCL — moved out)
Per-import audit on every new sibling file is in the commit's diff:
each carries only the imports its extracted code actually consumes.

Net effect
==========
auth_session_oidc.go: 1577 → 452 LOC (-1,125 = -71.3%). Four new
sibling files at 1,294 LOC total (1,125 moved + ~169 of header +
Phase 9 doc-comment overhead). The original hotspot drops below
the cmd/agent/main.go target for Sprint 12 (1489 LOC).

Cumulative Phase 9 progress (top 5 hotspots)
============================================
  config.go         3403 → 1342 (-60.6%, Sprints 1-7)
  cmd/server/main.go  2966 → 2260 (-23.8%, Sprints 8 + 8b)
  service/acme.go   1965 → 1162 (-40.9%, Sprints 9 + 9b)
  mcp/tools.go      1867 →  109 (-94.2%, Sprint 10)
  auth_session_oidc 1577 →  452 (-71.3%, Sprint 11)
  TOTAL across 5 files: 11,778 → 5,325 LOC = -6,453 (-54.8%)

Behavior preservation contract
==============================
1. gofmt -l clean across all 5 affected files.
2. go vet ./internal/api/handler/... — no findings.
3. staticcheck ./internal/api/handler/... — no findings.
4. go test -short -count=1 ./internal/api/handler/... — green
   (includes the 1,439-line auth_session_oidc_test.go suite that
   pins every moved handler's behavior including BCL replay,
   CSRF rotation, audit emission, and the Phase-5 RBAC path).
5. Broader-importer build green: go build ./... .
6. Broader-importer tests green: go test -short -count=1
   ./cmd/server/... ./internal/api/router/... .

cmd/server/main.go consumes handler.DefaultBCLVerifier +
handler.NewDefaultBCLVerifier + handler.DefaultBCLVerifierMaxAge
across three call sites; all three resolve unchanged through Go's
same-package public-export mechanism (the type + constructor
moved to a sibling file in the same `handler` package). The
mcp/tools_auth_bundle2.go comment string referencing
"oidcProviderRequest" is descriptive prose, not an import.

What remains for Phase 9
========================
One sibling-file split queued:
  - Sprint 12: cmd/agent/main.go (1489 LOC) → main + poll +
    deploy + register sibling files in same cmd/agent package
    (mirrors the cmd/server pattern from Sprints 8 + 8b).

Refs: ARCH-M2 (god-files), Phase 9 audit. Sprint 11 closes the
auth-session-OIDC handler hotspot from the audit's top-5 list.
This commit is contained in:
shankar0123
2026-05-14 10:22:33 +00:00
parent fbe053aa0c
commit cd374b243e
5 changed files with 1291 additions and 1131 deletions
File diff suppressed because it is too large Load Diff
@@ -0,0 +1,225 @@
// Copyright 2026 certctl LLC. All rights reserved.
// SPDX-License-Identifier: BUSL-1.1
package handler
import (
"context"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"strings"
"time"
gooidc "github.com/coreos/go-oidc/v3/oidc"
oidcdomain "github.com/certctl-io/certctl/internal/auth/oidc/domain"
"github.com/certctl-io/certctl/internal/repository"
)
// Phase 9 ARCH-M2 closure Sprint 11 (2026-05-14): extracted from
// internal/api/handler/auth_session_oidc.go via the Option B
// sibling-file pattern.
//
// This file holds the DefaultBCLVerifier — the default
// implementation of the BackChannelLogoutVerifier interface
// declared in auth_session_oidc.go. Verifies an OIDC
// back-channel-logout token per OpenID Connect Back-Channel
// Logout 1.0 §2.6: enforces the events claim, iat window,
// algorithm allowlist, audience match against the provider's
// configured client ID, and decodes sub/sid/jti for the
// revocation lookup.
//
// External callers:
// - cmd/server/main.go wires NewDefaultBCLVerifier(...) +
// DefaultBCLVerifierMaxAge into the AuthSessionOIDCHandler
// via WithBCLReplayConsumer.
//
// peekIssuer (unexported) is consumed only by Verify so it moves
// with the verifier. The go-oidc/v3 client is the underlying JWS
// verification + IdP-key-cache; everything else here is policy.
// =============================================================================
// Default BackChannelLogoutVerifier — wraps go-oidc/v3.
// =============================================================================
// DefaultBCLVerifierMaxAge is the default iat-freshness skew window
// (60 seconds; tokens older or newer than this are rejected). Override
// per-server via CERTCTL_OIDC_BCL_MAX_AGE_SECONDS. Audit 2026-05-10
// HIGH-3 closure.
const DefaultBCLVerifierMaxAge = 60 * time.Second
// DefaultBCLVerifier is the production BackChannelLogoutVerifier. It
// resolves the IdP by issuer (matched against the OIDCProviderRepository),
// fetches the IdP's JWKS via gooidc.Provider, and validates the
// logout_token JWT signature + required claims.
type DefaultBCLVerifier struct {
providerRepo repository.OIDCProviderRepository
tenantID string
allowedAlgs []string
// maxAge is the iat-freshness skew window. Tokens with iat in the
// past beyond this OR in the future beyond this are rejected. Set
// via WithMaxAge; defaults to DefaultBCLVerifierMaxAge.
maxAge time.Duration
// nowFn is the clock seam (test injection).
nowFn func() time.Time
// Injectable for tests so unit tests don't hit a real IdP.
verifyOverride func(ctx context.Context, providerIssuer, rawIDToken string) (*gooidc.IDToken, error)
}
// NewDefaultBCLVerifier constructs a verifier wired against the given
// provider repo + tenant.
func NewDefaultBCLVerifier(providerRepo repository.OIDCProviderRepository, tenantID string, allowedAlgs []string) *DefaultBCLVerifier {
if len(allowedAlgs) == 0 {
allowedAlgs = []string{
gooidc.RS256, gooidc.RS512, gooidc.ES256, gooidc.ES384, gooidc.EdDSA,
}
}
return &DefaultBCLVerifier{
providerRepo: providerRepo,
tenantID: tenantID,
allowedAlgs: allowedAlgs,
maxAge: DefaultBCLVerifierMaxAge,
nowFn: time.Now,
}
}
// WithMaxAge returns a copy of the verifier with the iat-skew window
// overridden. Audit 2026-05-10 HIGH-3 — operator-configurable via
// CERTCTL_OIDC_BCL_MAX_AGE_SECONDS at cmd/server/main.go.
func (v *DefaultBCLVerifier) WithMaxAge(d time.Duration) *DefaultBCLVerifier {
v.maxAge = d
return v
}
// Verify implements BackChannelLogoutVerifier.
func (v *DefaultBCLVerifier) Verify(ctx context.Context, logoutToken string) (issuer, sub, sid, jti string, iat int64, err error) {
// We don't know which provider the logout_token came from until we
// peek at the iss claim. Parse-without-verify, look up the matching
// provider, then verify against that provider's JWKS.
iss, peekErr := peekIssuer(logoutToken)
if peekErr != nil {
return "", "", "", "", 0, fmt.Errorf("peek issuer: %w", peekErr)
}
provs, lerr := v.providerRepo.List(ctx, v.tenantID)
if lerr != nil {
return "", "", "", "", 0, fmt.Errorf("list providers: %w", lerr)
}
var matched *oidcdomain.OIDCProvider
for _, p := range provs {
if p.IssuerURL == iss {
matched = p
break
}
}
if matched == nil {
return "", "", "", "", 0, fmt.Errorf("no provider configured for issuer %q", iss)
}
var idToken *gooidc.IDToken
if v.verifyOverride != nil {
idToken, err = v.verifyOverride(ctx, matched.IssuerURL, logoutToken)
} else {
provider, perr := gooidc.NewProvider(ctx, matched.IssuerURL)
if perr != nil {
return "", "", "", "", 0, fmt.Errorf("provider discovery: %w", perr)
}
verifier := provider.Verifier(&gooidc.Config{
ClientID: matched.ClientID,
SupportedSigningAlgs: v.allowedAlgs,
SkipExpiryCheck: true, // OIDC BCL §2.4 — no exp claim required
})
idToken, err = verifier.Verify(ctx, logoutToken)
}
if err != nil {
return "", "", "", "", 0, fmt.Errorf("verify: %w", err)
}
// Required claims per spec §2.4.
var claims struct {
Iss string `json:"iss"`
Aud interface{} `json:"aud"`
Iat int64 `json:"iat"`
Jti string `json:"jti"`
Events map[string]interface{} `json:"events"`
Sub string `json:"sub"`
Sid string `json:"sid"`
Nonce string `json:"nonce"`
}
if cerr := idToken.Claims(&claims); cerr != nil {
return "", "", "", "", 0, fmt.Errorf("claims unmarshal: %w", cerr)
}
if claims.Iat == 0 {
return "", "", "", "", 0, errors.New("missing iat claim")
}
// Audit 2026-05-10 HIGH-3 — iat freshness check. Reject tokens
// whose iat is outside the skew window. RFC 9700 §2.7 + the
// existing ID-token-path skew tolerance (oidc/service.go:463).
maxAge := v.maxAge
if maxAge <= 0 {
maxAge = DefaultBCLVerifierMaxAge
}
now := v.nowFn().UTC()
iatTime := time.Unix(claims.Iat, 0).UTC()
if iatTime.After(now.Add(maxAge)) {
return "", "", "", "", 0, fmt.Errorf("iat is in the future beyond max-age %s", maxAge)
}
if now.Sub(iatTime) > maxAge {
return "", "", "", "", 0, fmt.Errorf("iat is stale (age %s > max-age %s)", now.Sub(iatTime), maxAge)
}
if claims.Jti == "" {
return "", "", "", "", 0, errors.New("missing jti claim")
}
if claims.Events == nil {
return "", "", "", "", 0, errors.New("missing events claim")
}
if _, ok := claims.Events["http://schemas.openid.net/event/backchannel-logout"]; !ok {
return "", "", "", "", 0, errors.New("events claim missing back-channel-logout URI")
}
if claims.Nonce != "" {
// Spec §2.4: nonce MUST NOT be present.
return "", "", "", "", 0, errors.New("nonce claim must be absent in logout_token")
}
if claims.Sub == "" && claims.Sid == "" {
return "", "", "", "", 0, errors.New("logout_token must carry sub or sid")
}
return claims.Iss, claims.Sub, claims.Sid, claims.Jti, claims.Iat, nil
}
// peekIssuer base64-decodes the JWT payload (segment 1 after the `.`)
// and pulls the `iss` claim out without verifying the signature. Used
// to find the matching provider before we know which JWKS to use.
// peekIssuer extracts the `iss` claim from an unsigned JWT payload —
// used by the BCL handler to route the logout_token to the right
// provider for verification.
//
// Audit 2026-05-10 Nit-3 — peekIssuer is INTENTIONALLY unsigned-permissive.
// The returned issuer is used ONLY to select the verifier; the full
// signature + claim verification happens in DefaultBCLVerifier.Verify
// (which re-checks the `iss` claim against the matched provider's
// IssuerURL after JWS signature validation). Callers MUST NOT trust
// peekIssuer output for any access-control decision before the verify
// step completes; the pin is encoded in the BCL handler's call shape
// (peek → match provider → verify-against-provider → consume).
func peekIssuer(jwt string) (string, error) {
parts := strings.Split(jwt, ".")
if len(parts) != 3 {
return "", errors.New("expected 3 JWT segments")
}
payload, err := base64.RawURLEncoding.DecodeString(parts[1])
if err != nil {
return "", fmt.Errorf("payload base64: %w", err)
}
var c struct {
Iss string `json:"iss"`
}
if jerr := json.Unmarshal(payload, &c); jerr != nil {
return "", fmt.Errorf("payload json: %w", jerr)
}
if c.Iss == "" {
return "", errors.New("missing iss claim in payload")
}
return c.Iss, nil
}
@@ -0,0 +1,469 @@
// Copyright 2026 certctl LLC. All rights reserved.
// SPDX-License-Identifier: BUSL-1.1
package handler
import (
"context"
"encoding/json"
"errors"
"net/http"
"strings"
"time"
oidcsvc "github.com/certctl-io/certctl/internal/auth/oidc"
oidcdomain "github.com/certctl-io/certctl/internal/auth/oidc/domain"
"github.com/certctl-io/certctl/internal/repository"
)
// Phase 9 ARCH-M2 closure Sprint 11 (2026-05-14): extracted from
// internal/api/handler/auth_session_oidc.go via the Option B
// sibling-file pattern.
//
// This file holds Section 3 of the original three-section layout:
// OIDC PROVIDER + GROUP-MAPPING CRUD (RBAC-gated). Eight
// endpoints across two related resources:
//
// GET /api/v1/auth/oidc/providers -> auth.oidc.list
// POST /api/v1/auth/oidc/providers -> auth.oidc.create
// PUT /api/v1/auth/oidc/providers/{id} -> auth.oidc.edit
// DELETE /api/v1/auth/oidc/providers/{id} -> auth.oidc.delete
// POST /api/v1/auth/oidc/providers/{id}/test -> auth.oidc.edit
// POST /api/v1/auth/oidc/providers/{id}/refresh -> auth.oidc.edit
// GET /api/v1/auth/oidc/group-mappings -> auth.oidc.list
// POST /api/v1/auth/oidc/group-mappings -> auth.oidc.edit
// DELETE /api/v1/auth/oidc/group-mappings/{id} -> auth.oidc.edit
//
// The four request/response projection types (oidcProviderRequest,
// oidcProviderResponse, groupMappingRequest, groupMappingResponse)
// move with their handler callers. The encryptClientSecret +
// recordAudit + randomB64URLForHandler + defaultIfBlank +
// defaultIntIfZero helpers stay in auth_session_oidc.go — they're
// also consumed elsewhere (recordAudit is used by every section)
// or are generic utilities that don't have a single owner.
//
// NOTE: the audit's verb-based prescription (login / callback /
// refresh / logout / backchannel) named "refresh" as a separate
// sibling file. The RefreshProvider handler here is the only
// "refresh" in this file, but operationally it's an ADMIN
// operation on a provider's signing-key cache, not a session
// refresh. Sprint 11 keeps it grouped with the rest of the
// provider CRUD where it belongs by call-graph + permission scope
// (auth.oidc.edit, the same RBAC permission as Update/Delete).
// =============================================================================
// 3. OIDC provider + group-mapping CRUD.
// =============================================================================
type oidcProviderResponse struct {
ID string `json:"id"`
TenantID string `json:"tenant_id"`
Name string `json:"name"`
IssuerURL string `json:"issuer_url"`
ClientID string `json:"client_id"`
RedirectURI string `json:"redirect_uri"`
GroupsClaimPath string `json:"groups_claim_path"`
GroupsClaimFormat string `json:"groups_claim_format"`
FetchUserinfo bool `json:"fetch_userinfo"`
Scopes []string `json:"scopes"`
AllowedEmailDomains []string `json:"allowed_email_domains"`
IATWindowSeconds int `json:"iat_window_seconds"`
JWKSCacheTTLSeconds int `json:"jwks_cache_ttl_seconds"`
CreatedAt string `json:"created_at"`
UpdatedAt string `json:"updated_at"`
}
func providerToResponse(p *oidcdomain.OIDCProvider) oidcProviderResponse {
return oidcProviderResponse{
ID: p.ID, TenantID: p.TenantID, Name: p.Name,
IssuerURL: p.IssuerURL, ClientID: p.ClientID, RedirectURI: p.RedirectURI,
GroupsClaimPath: p.GroupsClaimPath, GroupsClaimFormat: p.GroupsClaimFormat,
FetchUserinfo: p.FetchUserinfo, Scopes: p.Scopes, AllowedEmailDomains: p.AllowedEmailDomains,
IATWindowSeconds: p.IATWindowSeconds, JWKSCacheTTLSeconds: p.JWKSCacheTTLSeconds,
CreatedAt: p.CreatedAt.UTC().Format(time.RFC3339),
UpdatedAt: p.UpdatedAt.UTC().Format(time.RFC3339),
}
}
type oidcProviderRequest struct {
Name string `json:"name"`
IssuerURL string `json:"issuer_url"`
ClientID string `json:"client_id"`
ClientSecret string `json:"client_secret"` // plaintext on the wire ONLY at create/update; encrypted at rest
RedirectURI string `json:"redirect_uri"`
GroupsClaimPath string `json:"groups_claim_path"`
GroupsClaimFormat string `json:"groups_claim_format"`
FetchUserinfo bool `json:"fetch_userinfo"`
Scopes []string `json:"scopes"`
AllowedEmailDomains []string `json:"allowed_email_domains"`
IATWindowSeconds int `json:"iat_window_seconds"`
JWKSCacheTTLSeconds int `json:"jwks_cache_ttl_seconds"`
}
// ListProviders handles GET /api/v1/auth/oidc/providers.
func (h *AuthSessionOIDCHandler) ListProviders(w http.ResponseWriter, r *http.Request) {
if _, err := callerFromRequest(r); err != nil {
writeAuthError(w, err)
return
}
provs, err := h.providerRepo.List(r.Context(), h.tenantID)
if err != nil {
Error(w, http.StatusInternalServerError, "could not list providers")
return
}
out := make([]oidcProviderResponse, 0, len(provs))
for _, p := range provs {
out = append(out, providerToResponse(p))
}
writeJSON(w, http.StatusOK, map[string]interface{}{"providers": out})
}
// CreateProvider handles POST /api/v1/auth/oidc/providers.
func (h *AuthSessionOIDCHandler) CreateProvider(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
var req oidcProviderRequest
if derr := json.NewDecoder(r.Body).Decode(&req); derr != nil {
Error(w, http.StatusBadRequest, "invalid JSON body")
return
}
if strings.TrimSpace(req.ClientSecret) == "" {
Error(w, http.StatusBadRequest, "client_secret is required")
return
}
encrypted, eerr := h.encryptClientSecret([]byte(req.ClientSecret))
if eerr != nil {
Error(w, http.StatusInternalServerError, "could not encrypt client secret")
return
}
prov := &oidcdomain.OIDCProvider{
ID: "op-" + randomB64URLForHandler(16),
TenantID: h.tenantID,
Name: req.Name,
IssuerURL: req.IssuerURL,
ClientID: req.ClientID,
ClientSecretEncrypted: encrypted,
RedirectURI: req.RedirectURI,
GroupsClaimPath: defaultIfBlank(req.GroupsClaimPath, oidcdomain.DefaultGroupsClaimPath),
GroupsClaimFormat: defaultIfBlank(req.GroupsClaimFormat, oidcdomain.GroupsClaimFormatStringArray),
FetchUserinfo: req.FetchUserinfo,
Scopes: req.Scopes,
AllowedEmailDomains: req.AllowedEmailDomains,
IATWindowSeconds: defaultIntIfZero(req.IATWindowSeconds, oidcdomain.DefaultIATWindowSeconds),
JWKSCacheTTLSeconds: defaultIntIfZero(req.JWKSCacheTTLSeconds, oidcdomain.DefaultJWKSCacheTTLSeconds),
}
if verr := prov.Validate(); verr != nil {
Error(w, http.StatusBadRequest, verr.Error())
return
}
if cerr := h.providerRepo.Create(r.Context(), prov); cerr != nil {
if errors.Is(cerr, repository.ErrOIDCProviderDuplicateName) {
Error(w, http.StatusConflict, "provider name already exists")
return
}
Error(w, http.StatusInternalServerError, "could not create provider")
return
}
h.recordAudit(r.Context(), "auth.oidc_provider_created", caller.ActorID, caller.ActorType, prov.ID,
map[string]interface{}{"provider_id": prov.ID, "name": prov.Name, "issuer_url": prov.IssuerURL})
writeJSON(w, http.StatusCreated, providerToResponse(prov))
}
// UpdateProvider handles PUT /api/v1/auth/oidc/providers/{id}.
func (h *AuthSessionOIDCHandler) UpdateProvider(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
id := r.PathValue("id")
if id == "" {
Error(w, http.StatusBadRequest, "missing provider id")
return
}
existing, gerr := h.providerRepo.Get(r.Context(), id)
if gerr != nil {
if errors.Is(gerr, repository.ErrOIDCProviderNotFound) {
Error(w, http.StatusNotFound, "provider not found")
return
}
Error(w, http.StatusInternalServerError, "could not load provider")
return
}
var req oidcProviderRequest
if derr := json.NewDecoder(r.Body).Decode(&req); derr != nil {
Error(w, http.StatusBadRequest, "invalid JSON body")
return
}
// Mutable fields only (id / tenant_id / created_at preserved).
existing.Name = req.Name
existing.IssuerURL = req.IssuerURL
existing.ClientID = req.ClientID
existing.RedirectURI = req.RedirectURI
existing.GroupsClaimPath = defaultIfBlank(req.GroupsClaimPath, existing.GroupsClaimPath)
existing.GroupsClaimFormat = defaultIfBlank(req.GroupsClaimFormat, existing.GroupsClaimFormat)
existing.FetchUserinfo = req.FetchUserinfo
existing.Scopes = req.Scopes
existing.AllowedEmailDomains = req.AllowedEmailDomains
if req.IATWindowSeconds != 0 {
existing.IATWindowSeconds = req.IATWindowSeconds
}
if req.JWKSCacheTTLSeconds != 0 {
existing.JWKSCacheTTLSeconds = req.JWKSCacheTTLSeconds
}
// Re-encrypt client_secret only if a new one is supplied; empty
// preserves the existing ciphertext.
if strings.TrimSpace(req.ClientSecret) != "" {
encrypted, eerr := h.encryptClientSecret([]byte(req.ClientSecret))
if eerr != nil {
Error(w, http.StatusInternalServerError, "could not encrypt client secret")
return
}
existing.ClientSecretEncrypted = encrypted
}
if verr := existing.Validate(); verr != nil {
Error(w, http.StatusBadRequest, verr.Error())
return
}
if uerr := h.providerRepo.Update(r.Context(), existing); uerr != nil {
Error(w, http.StatusInternalServerError, "could not update provider")
return
}
h.recordAudit(r.Context(), "auth.oidc_provider_updated", caller.ActorID, caller.ActorType, existing.ID,
map[string]interface{}{"provider_id": existing.ID, "name": existing.Name})
writeJSON(w, http.StatusOK, providerToResponse(existing))
}
// DeleteProvider handles DELETE /api/v1/auth/oidc/providers/{id}.
// Refused when at least one user has authenticated via this provider.
func (h *AuthSessionOIDCHandler) DeleteProvider(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
id := r.PathValue("id")
if id == "" {
Error(w, http.StatusBadRequest, "missing provider id")
return
}
if derr := h.providerRepo.Delete(r.Context(), id); derr != nil {
switch {
case errors.Is(derr, repository.ErrOIDCProviderNotFound):
Error(w, http.StatusNotFound, "provider not found")
case errors.Is(derr, repository.ErrOIDCProviderInUse):
Error(w, http.StatusConflict, "provider has authenticated users; revoke all sessions before delete")
default:
Error(w, http.StatusInternalServerError, "could not delete provider")
}
return
}
h.recordAudit(r.Context(), "auth.oidc_provider_deleted", caller.ActorID, caller.ActorType, id,
map[string]interface{}{"provider_id": id})
w.WriteHeader(http.StatusNoContent)
}
// TestProvider handles POST /api/v1/auth/oidc/test.
//
// Audit 2026-05-10 MED-5 closure. Dry-run validator for an OIDC
// provider config: runs OIDC discovery, the alg-downgrade defense,
// the RFC 9207 iss-parameter detection, and a JWKS fetch — without
// persisting anything. Body: `{issuer_url, client_id, scopes}`
// (client_secret accepted but ignored — discovery + JWKS don't
// require it). Response: TestDiscoveryResult; HTTP 200 even when
// individual checks fail (the response Errors field carries them so
// the GUI can render per-check status rows).
//
// Permission gate: `auth.oidc.create` (the operator is dry-running a
// provider they're about to create; the lookup endpoints have their
// own .list gate so this can't be used as a roundabout reconnaissance
// vector beyond what those already permit).
func (h *AuthSessionOIDCHandler) TestProvider(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
var req struct {
IssuerURL string `json:"issuer_url"`
ClientID string `json:"client_id"`
ClientSecret string `json:"client_secret"`
Scopes []string `json:"scopes"`
}
if derr := json.NewDecoder(r.Body).Decode(&req); derr != nil {
Error(w, http.StatusBadRequest, "invalid JSON body")
return
}
if strings.TrimSpace(req.IssuerURL) == "" {
Error(w, http.StatusBadRequest, "issuer_url is required")
return
}
// Type-assert to the concrete service so we can reach the
// TestDiscovery method. The OIDCAuthHandshaker interface is
// intentionally narrow; rather than widening it (which would force
// every test stub to implement TestDiscovery) we accept the
// concrete reference for this single endpoint. Production code
// always supplies *oidcsvc.Service.
type discoveryTester interface {
TestDiscovery(ctx context.Context, issuerURL string) (*oidcsvc.TestDiscoveryResult, error)
}
tester, ok := h.oidcSvc.(discoveryTester)
if !ok {
Error(w, http.StatusInternalServerError, "OIDC service does not support discovery test")
return
}
res, terr := tester.TestDiscovery(r.Context(), strings.TrimSpace(req.IssuerURL))
if terr != nil {
Error(w, http.StatusInternalServerError, "discovery test execution failed")
return
}
h.recordAudit(r.Context(), "auth.oidc_provider_tested", caller.ActorID, caller.ActorType, "",
map[string]interface{}{
"issuer_url": req.IssuerURL,
"discovery_succeeded": res.DiscoverySucceeded,
"jwks_reachable": res.JWKSReachable,
"iss_param_supported": res.IssParamSupported,
"error_count": len(res.Errors),
})
writeJSON(w, http.StatusOK, res)
}
// RefreshProvider handles POST /api/v1/auth/oidc/providers/{id}/refresh.
// Forces re-fetch of the IdP discovery doc + JWKS, re-runs the IdP
// downgrade-attack defense.
func (h *AuthSessionOIDCHandler) RefreshProvider(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
id := r.PathValue("id")
if id == "" {
Error(w, http.StatusBadRequest, "missing provider id")
return
}
if rerr := h.oidcSvc.RefreshKeys(r.Context(), id); rerr != nil {
if errors.Is(rerr, repository.ErrOIDCProviderNotFound) {
Error(w, http.StatusNotFound, "provider not found")
return
}
Error(w, http.StatusBadRequest, "refresh failed: "+rerr.Error())
return
}
h.recordAudit(r.Context(), "auth.oidc_provider_refreshed", caller.ActorID, caller.ActorType, id,
map[string]interface{}{"provider_id": id})
writeJSON(w, http.StatusOK, map[string]interface{}{"refreshed": true})
}
type groupMappingResponse struct {
ID string `json:"id"`
ProviderID string `json:"provider_id"`
GroupName string `json:"group_name"`
RoleID string `json:"role_id"`
TenantID string `json:"tenant_id"`
CreatedAt string `json:"created_at"`
}
func mappingToResponse(m *oidcdomain.GroupRoleMapping) groupMappingResponse {
return groupMappingResponse{
ID: m.ID, ProviderID: m.ProviderID, GroupName: m.GroupName,
RoleID: m.RoleID, TenantID: m.TenantID,
CreatedAt: m.CreatedAt.UTC().Format(time.RFC3339),
}
}
type groupMappingRequest struct {
ProviderID string `json:"provider_id"`
GroupName string `json:"group_name"`
RoleID string `json:"role_id"`
}
// ListGroupMappings handles GET /api/v1/auth/oidc/group-mappings?provider_id=<id>.
func (h *AuthSessionOIDCHandler) ListGroupMappings(w http.ResponseWriter, r *http.Request) {
if _, err := callerFromRequest(r); err != nil {
writeAuthError(w, err)
return
}
providerID := strings.TrimSpace(r.URL.Query().Get("provider_id"))
if providerID == "" {
Error(w, http.StatusBadRequest, "missing required query parameter `provider_id`")
return
}
mappings, lerr := h.mappingRepo.ListByProvider(r.Context(), providerID)
if lerr != nil {
Error(w, http.StatusInternalServerError, "could not list mappings")
return
}
out := make([]groupMappingResponse, 0, len(mappings))
for _, m := range mappings {
out = append(out, mappingToResponse(m))
}
writeJSON(w, http.StatusOK, map[string]interface{}{"mappings": out})
}
// AddGroupMapping handles POST /api/v1/auth/oidc/group-mappings.
func (h *AuthSessionOIDCHandler) AddGroupMapping(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
var req groupMappingRequest
if derr := json.NewDecoder(r.Body).Decode(&req); derr != nil {
Error(w, http.StatusBadRequest, "invalid JSON body")
return
}
mapping := &oidcdomain.GroupRoleMapping{
ID: "grm-" + randomB64URLForHandler(16),
ProviderID: req.ProviderID,
GroupName: req.GroupName,
RoleID: req.RoleID,
TenantID: h.tenantID,
}
if verr := mapping.Validate(); verr != nil {
Error(w, http.StatusBadRequest, verr.Error())
return
}
if aerr := h.mappingRepo.Add(r.Context(), mapping); aerr != nil {
if errors.Is(aerr, repository.ErrGroupRoleMappingDuplicate) {
Error(w, http.StatusConflict, "mapping already exists")
return
}
Error(w, http.StatusInternalServerError, "could not add mapping")
return
}
h.recordAudit(r.Context(), "auth.group_mapping_added", caller.ActorID, caller.ActorType, mapping.ID,
map[string]interface{}{
"mapping_id": mapping.ID, "provider_id": mapping.ProviderID,
"group_name": mapping.GroupName, "role_id": mapping.RoleID,
})
writeJSON(w, http.StatusCreated, mappingToResponse(mapping))
}
// RemoveGroupMapping handles DELETE /api/v1/auth/oidc/group-mappings/{id}.
func (h *AuthSessionOIDCHandler) RemoveGroupMapping(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
id := r.PathValue("id")
if id == "" {
Error(w, http.StatusBadRequest, "missing mapping id")
return
}
if rerr := h.mappingRepo.Remove(r.Context(), id); rerr != nil {
if errors.Is(rerr, repository.ErrGroupRoleMappingNotFound) {
Error(w, http.StatusNotFound, "mapping not found")
return
}
Error(w, http.StatusInternalServerError, "could not remove mapping")
return
}
h.recordAudit(r.Context(), "auth.group_mapping_removed", caller.ActorID, caller.ActorType, id,
map[string]interface{}{"mapping_id": id})
w.WriteHeader(http.StatusNoContent)
}
@@ -0,0 +1,390 @@
// Copyright 2026 certctl LLC. All rights reserved.
// SPDX-License-Identifier: BUSL-1.1
package handler
import (
"errors"
"net/http"
"strings"
"time"
oidcdomain "github.com/certctl-io/certctl/internal/auth/oidc/domain"
sessionsvc "github.com/certctl-io/certctl/internal/auth/session"
sessiondomain "github.com/certctl-io/certctl/internal/auth/session/domain"
"github.com/certctl-io/certctl/internal/domain"
"github.com/certctl-io/certctl/internal/repository"
)
// Phase 9 ARCH-M2 closure Sprint 11 (2026-05-14): extracted from
// internal/api/handler/auth_session_oidc.go via the Option B
// sibling-file pattern. Package stays `handler`; every external
// caller of `handler.AuthSessionOIDCHandler.{LoginInitiate,
// LoginCallback, BackChannelLogout, Logout}` resolves the same
// way — pure mechanical relocation. The router wiring in
// internal/api/router/router.go is unaffected.
//
// This file holds Section 1 of the original file's three-section
// layout (per its own package doc-comment): the PUBLIC OIDC
// HANDSHAKE handlers. These four endpoints are auth-exempt — they
// run before the caller has a certctl-issued credential:
//
// GET /auth/oidc/login?provider=<id> -> 302 to IdP
// GET /auth/oidc/callback?code=...&state=... -> consume + mint
// POST /auth/oidc/back-channel-logout -> IdP-initiated
// POST /auth/logout -> revoke caller's
//
// Helpers (h.clearPreLoginCookie / h.clearSessionCookies /
// h.recordAudit / clientIPFromRequest / classifyOIDCFailure) stay
// in auth_session_oidc.go alongside the AuthSessionOIDCHandler
// struct + constructor — same-package resolution makes the calls
// reach across the file boundary at zero compile-time cost.
// =============================================================================
// 1. Public OIDC handshake handlers.
// =============================================================================
// LoginInitiate handles GET /auth/oidc/login?provider=<id>.
//
// Generates state + nonce + PKCE-S256 verifier (in OIDCService),
// persists the pre-login row, sets the certctl_oidc_pending cookie,
// 302-redirects to the IdP authorization URL.
func (h *AuthSessionOIDCHandler) LoginInitiate(w http.ResponseWriter, r *http.Request) {
providerID := strings.TrimSpace(r.URL.Query().Get("provider"))
if providerID == "" {
Error(w, http.StatusBadRequest, "missing required query parameter `provider`")
return
}
// Audit 2026-05-10 MED-16 — capture clientIP + UA at /auth/oidc/login
// so HandleCallback can reject a stolen pre-login cookie replayed
// from a different browser/source. clientIPFromRequest already
// honours the LOW-5 trusted-proxy gating; r.UserAgent() reads the
// header verbatim.
loginIP := clientIPFromRequest(r)
loginUA := r.UserAgent()
authURL, cookieValue, _, err := h.oidcSvc.HandleAuthRequest(r.Context(), providerID, loginIP, loginUA)
if err != nil {
// Provider not found is the most common case; map to 404.
if errors.Is(err, repository.ErrOIDCProviderNotFound) {
Error(w, http.StatusNotFound, "provider not found")
return
}
// Other errors (disco fetch failure / IdP downgrade defense /
// crypto failure) are server-side; surface as 500 without
// leaking details.
Error(w, http.StatusInternalServerError, "could not initiate OIDC login")
return
}
http.SetCookie(w, &http.Cookie{
Name: sessiondomain.PreLoginCookieName,
Value: cookieValue,
// Audit 2026-05-10 MED-14 — `__Host-` prefix requires Path=/.
// The cookie lives 10 minutes and is only ever consumed by the
// callback handler; the wider path scope is harmless.
Path: "/",
MaxAge: int((10 * time.Minute).Seconds()),
Secure: h.cookieAttrs.Secure,
HttpOnly: true,
// Pre-login cookie MUST be SameSite=Lax (cannot be Strict
// because the IdP-initiated callback is a top-level navigation
// from a different origin per Phase 5 spec).
SameSite: http.SameSiteLaxMode,
})
http.Redirect(w, r, authURL, http.StatusFound)
}
// LoginCallback handles GET /auth/oidc/callback?code=...&state=....
//
// Reads the certctl_oidc_pending cookie, drives OIDCService.HandleCallback
// (which parses + HMAC-verifies the cookie, runs the 11-step token
// validation, group-claim resolution, role-mapping, user-upsert),
// mints a post-login session via SessionService.Create, deletes the
// pre-login cookie, sets the post-login cookie + CSRF token cookie,
// and 302's to the dashboard.
func (h *AuthSessionOIDCHandler) LoginCallback(w http.ResponseWriter, r *http.Request) {
q := r.URL.Query()
code := strings.TrimSpace(q.Get("code"))
state := strings.TrimSpace(q.Get("state"))
// Audit 2026-05-10 MED-17 — RFC 9207 iss URL parameter. NOT
// trimmed; preserved exactly as sent so the service-layer compare
// against the matched provider's IssuerURL is byte-strict. The IdP
// emits this only when advertised in its discovery doc; the
// service-layer check is a no-op otherwise.
callbackIss := q.Get("iss")
if code == "" || state == "" {
Error(w, http.StatusBadRequest, "missing code or state query parameter")
return
}
preLoginCookie, err := r.Cookie(sessiondomain.PreLoginCookieName)
if err != nil || preLoginCookie.Value == "" {
Error(w, http.StatusBadRequest, "missing pre-login cookie")
h.recordAudit(r.Context(), "auth.oidc_login_failed", "anonymous", domain.ActorTypeSystem, "",
map[string]interface{}{"failure_category": "missing_pre_login_cookie"})
return
}
clientIP := clientIPFromRequest(r)
userAgent := r.UserAgent()
res, err := h.oidcSvc.HandleCallback(r.Context(), preLoginCookie.Value, code, state, callbackIss, clientIP, userAgent)
if err != nil {
// Audit 2026-05-10 HIGH-7 — instead of a blank 400, redirect
// to /login?error=oidc_failed&reason=<category>. The LoginPage
// reads the query params and renders an operator-friendly
// alert. The audit row still carries the specific
// failure_category so server-side observability is unchanged.
category := classifyOIDCFailure(err)
h.recordAudit(r.Context(), "auth.oidc_login_failed", "anonymous", domain.ActorTypeSystem, "",
map[string]interface{}{"failure_category": category})
// Special-case unmapped groups so the audit row name distinguishes
// it from generic failures (operator-policy decision).
if category == "unmapped_groups" {
h.recordAudit(r.Context(), "auth.oidc_login_unmapped_groups", "anonymous", domain.ActorTypeSystem, "",
map[string]interface{}{})
}
// Always clear the pre-login cookie on failure.
h.clearPreLoginCookie(w)
// 302 to the login page; the reason categorizes the failure for
// the GUI to render. Keep the redirect target relative — the
// SPA serves /login.
http.Redirect(w, r, "/login?error=oidc_failed&reason="+category, http.StatusFound)
return
}
// res from the OIDC service already carries cookieValue + CSRFToken
// (the OIDC service wraps SessionService internally per Phase 3).
// We re-emit them via the standard Set-Cookie helper here so cookie
// attributes stay handler-controlled.
now := time.Now().UTC()
expires := now.Add(8 * time.Hour) // matches default SessionConfig.AbsoluteTimeout
http.SetCookie(w, &http.Cookie{
Name: sessiondomain.PostLoginCookieName,
Value: res.CookieValue,
Path: "/",
Expires: expires,
Secure: h.cookieAttrs.Secure,
HttpOnly: true,
SameSite: h.cookieAttrs.SameSite,
})
http.SetCookie(w, &http.Cookie{
Name: sessiondomain.CSRFCookieName,
Value: res.CSRFToken,
Path: "/",
Expires: expires,
Secure: h.cookieAttrs.Secure,
HttpOnly: false, // intentional — GUI must read this to echo header
SameSite: h.cookieAttrs.SameSite,
})
h.clearPreLoginCookie(w)
userID := ""
if res.User != nil {
userID = res.User.ID
}
h.recordAudit(r.Context(), "auth.oidc_login_succeeded", userID, domain.ActorTypeUser, userID,
map[string]interface{}{
"user_id": userID,
"role_ids": res.RoleIDs,
})
h.recordAudit(r.Context(), "auth.session_created", userID, domain.ActorTypeUser, userID,
map[string]interface{}{"user_id": userID})
http.Redirect(w, r, h.postLoginURL, http.StatusFound)
}
// BackChannelLogout handles POST /auth/oidc/back-channel-logout.
//
// OpenID Connect Back-Channel Logout 1.0. The IdP POSTs a logout_token
// JWT in the body (form-encoded `logout_token=<jwt>`); certctl validates
// signature against the IdP's JWKS, validates required claims (iss, aud,
// iat, jti, events; exactly one of sub or sid; nonce ABSENT), revokes
// matching sessions, returns 200 with Cache-Control: no-store. Failure
// modes return 400 per spec §2.6.
func (h *AuthSessionOIDCHandler) BackChannelLogout(w http.ResponseWriter, r *http.Request) {
if err := r.ParseForm(); err != nil {
Error(w, http.StatusBadRequest, "could not parse form body")
return
}
logoutToken := strings.TrimSpace(r.FormValue("logout_token"))
if logoutToken == "" {
Error(w, http.StatusBadRequest, "missing logout_token in form body")
return
}
issuer, sub, sid, jti, _, err := h.bclVerifier.Verify(r.Context(), logoutToken)
if err != nil {
// Per spec §2.6 — uniform 400 on any validation failure. The
// audit row carries the specific reason; the wire stays uniform.
// iat-skew rejections (Audit 2026-05-10 HIGH-3 iat-window check)
// land here too — the reason string distinguishes them.
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout_failed", "anonymous", domain.ActorTypeSystem, "",
map[string]interface{}{"failure_reason": err.Error()})
Error(w, http.StatusBadRequest, "logout_token validation failed")
return
}
// Audit 2026-05-10 HIGH-3 — jti consumed-set. Atomic single-use
// semantics via the postgres ON CONFLICT DO NOTHING path. On
// replay return 200 + audit outcome=jti_replayed (RFC 9700 §2.7).
// On transient repo error return 503 so the IdP follows its retry
// semantics. When the consumer is nil (test path / pre-fix
// deployments) the consume step is skipped.
if h.bclReplay != nil && jti != "" {
ttl := h.bclMaxAge * 2
if ttl < 24*time.Hour {
ttl = 24 * time.Hour
}
if cerr := h.bclReplay.ConsumeJTI(r.Context(), jti, issuer, ttl); cerr != nil {
if errors.Is(cerr, repository.ErrBCLJTIAlreadyConsumed) {
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout", "anonymous", domain.ActorTypeSystem, sub,
map[string]interface{}{"issuer": issuer, "subject": sub, "jti": jti, "outcome": "jti_replayed"})
w.Header().Set("Cache-Control", "no-store")
w.WriteHeader(http.StatusOK)
return
}
// Transient — let the IdP retry.
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout_failed", "anonymous", domain.ActorTypeSystem, sub,
map[string]interface{}{"issuer": issuer, "subject": sub, "jti": jti, "outcome": "jti_consume_failed", "err": cerr.Error()})
http.Error(w, "transient", http.StatusServiceUnavailable)
return
}
}
// Resolve target sessions:
// - sub set: revoke ALL sessions for the actor (oidc_subject lookup).
// - sid set: revoke the specific session_id.
if sid != "" {
if rerr := h.sessionSvc.Revoke(r.Context(), sid); rerr != nil {
// Idempotent at the repo layer; rerr is unlikely. Audit
// regardless and return 200 (the IdP shouldn't retry on
// our errors).
_ = rerr
}
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout", "anonymous", domain.ActorTypeSystem, sid,
map[string]interface{}{"sub_or_sid": "sid", "issuer": issuer, "session_id": sid})
} else if sub != "" {
// CRIT-2 closure of the 2026-05-10 audit. Pre-fix this branch called
// RevokeAllForActor(sub, "User") under the false assumption that
// the OIDC subject was used as the actor_id stem. In reality,
// internal/auth/oidc/service.go::upsertUser mints
// u.ID = "u-" + randomB64URL(16) and stores the OIDC subject in
// a separate column, so the pre-fix lookup never found a session
// row and the error was silently swallowed. BCL silently revoked
// nothing — CWE-613.
//
// The fix resolves the IdP-signed `iss` claim back to a provider
// row via providerRepo.List + IssuerURL filter, then resolves
// sub → user.ID via userRepo.GetByOIDCSubject, then revokes all
// sessions for that actor. Outcome categories audited:
// - revoked (happy path)
// - issuer_unknown (iss doesn't match any configured provider)
// - user_unknown (provider matched, but no user.id seeded for this subject)
// - revoke_failed (DB hiccup at the revoke step)
// - provider_lookup_failed / user_lookup_failed → 503 (transient; IdP retries)
// All success-shaped outcomes return 200 + Cache-Control: no-store
// per OIDC BCL 1.0 §2.7. Transient errors return 503 so the IdP
// follows its own retry semantics.
providers, plerr := h.providerRepo.List(r.Context(), h.tenantID)
if plerr != nil {
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout", "anonymous", domain.ActorTypeSystem, sub,
map[string]interface{}{"sub_or_sid": "sub", "issuer": issuer, "subject": sub, "outcome": "provider_lookup_failed"})
http.Error(w, "transient", http.StatusServiceUnavailable)
return
}
var matched *oidcdomain.OIDCProvider
for _, p := range providers {
if p.IssuerURL == issuer {
matched = p
break
}
}
if matched == nil {
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout", "anonymous", domain.ActorTypeSystem, sub,
map[string]interface{}{"sub_or_sid": "sub", "issuer": issuer, "subject": sub, "outcome": "issuer_unknown"})
// Idempotent — return 200 per spec.
w.Header().Set("Cache-Control", "no-store")
w.WriteHeader(http.StatusOK)
return
}
user, uerr := h.userRepo.GetByOIDCSubject(r.Context(), matched.ID, sub)
if uerr != nil {
if errors.Is(uerr, repository.ErrUserNotFound) {
// Idempotent: nothing to revoke. IdP may BCL a user we
// never logged in. RFC compliance: still 200.
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout", "anonymous", domain.ActorTypeSystem, sub,
map[string]interface{}{"sub_or_sid": "sub", "issuer": issuer, "subject": sub, "outcome": "user_unknown"})
w.Header().Set("Cache-Control", "no-store")
w.WriteHeader(http.StatusOK)
return
}
// Transient — let the IdP retry.
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout", "anonymous", domain.ActorTypeSystem, sub,
map[string]interface{}{"sub_or_sid": "sub", "issuer": issuer, "subject": sub, "outcome": "user_lookup_failed"})
http.Error(w, "transient", http.StatusServiceUnavailable)
return
}
if rerr := h.sessionSvc.RevokeAllForActor(r.Context(), user.ID, string(domain.ActorTypeUser)); rerr != nil {
// Revoke failed — BCL is best-effort per §2.8; still 200,
// audit the failure.
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout", user.ID, domain.ActorTypeUser, sub,
map[string]interface{}{"sub_or_sid": "sub", "issuer": issuer, "subject": sub, "outcome": "revoke_failed"})
w.Header().Set("Cache-Control", "no-store")
w.WriteHeader(http.StatusOK)
return
}
h.recordAudit(r.Context(), "auth.oidc_back_channel_logout", user.ID, domain.ActorTypeUser, sub,
map[string]interface{}{"sub_or_sid": "sub", "issuer": issuer, "subject": sub, "outcome": "revoked"})
}
// Per spec §2.7 — Cache-Control: no-store on success.
w.Header().Set("Cache-Control", "no-store")
w.WriteHeader(http.StatusOK)
}
// Logout handles POST /auth/logout. Revokes the caller's current
// session. Permission: own session (any authenticated caller).
func (h *AuthSessionOIDCHandler) Logout(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
// Resolve the caller's session via the cookie -> Validate path.
sessionCookie, cerr := r.Cookie(sessiondomain.PostLoginCookieName)
if cerr != nil || sessionCookie.Value == "" {
// No cookie => nothing to revoke; treat as success (idempotent).
h.clearSessionCookies(w)
w.WriteHeader(http.StatusNoContent)
return
}
sess, verr := h.sessionSvc.Validate(r.Context(), sessionsvc.ValidateInput{
CookieValue: sessionCookie.Value,
ClientIP: clientIPFromRequest(r),
UserAgent: r.UserAgent(),
})
if verr != nil {
// Cookie is invalid; clear + 204 (idempotent).
h.clearSessionCookies(w)
w.WriteHeader(http.StatusNoContent)
return
}
if rerr := h.sessionSvc.Revoke(r.Context(), sess.ID); rerr != nil {
Error(w, http.StatusInternalServerError, "could not revoke session")
return
}
// Audit 2026-05-11 Fix 13 — HIGH-2 fourth call site. Rotate the CSRF
// token on the actor's remaining sessions so a token captured in
// this device's browser pre-logout (DevTools, malicious extension,
// session-storage leak) can't be replayed against a sibling session
// (other browser, other device) after the user logged out here.
// The just-revoked session also rotates but its CSRF lookup will
// fail at the sessions table's revoked_at IS NOT NULL filter
// anyway; rotation on the revoked row is harmless. RotateCSRFTokenForActor
// returns the count rotated and NEVER errors — rotation is defense
// in depth and must not block the logout success.
rotated := h.sessionSvc.RotateCSRFTokenForActor(r.Context(), caller.ActorID, string(caller.ActorType))
h.recordAudit(r.Context(), "auth.session_revoked", caller.ActorID, caller.ActorType, sess.ID,
map[string]interface{}{"session_id": sess.ID, "self_initiated": true, "csrf_rotated": rotated})
h.clearSessionCookies(w)
w.WriteHeader(http.StatusNoContent)
}
@@ -0,0 +1,207 @@
// Copyright 2026 certctl LLC. All rights reserved.
// SPDX-License-Identifier: BUSL-1.1
package handler
import (
"errors"
"net/http"
"time"
sessionsvc "github.com/certctl-io/certctl/internal/auth/session"
sessiondomain "github.com/certctl-io/certctl/internal/auth/session/domain"
"github.com/certctl-io/certctl/internal/repository"
)
// Phase 9 ARCH-M2 closure Sprint 11 (2026-05-14): extracted from
// internal/api/handler/auth_session_oidc.go via the Option B
// sibling-file pattern.
//
// This file holds Section 2 of the original three-section layout:
// the SESSION MANAGEMENT handlers (RBAC-gated). Three endpoints:
//
// GET /api/v1/auth/sessions -> list (own / all-actors)
// DELETE /api/v1/auth/sessions/{id} -> revoke (own / any)
// DELETE /api/v1/auth/sessions/all-except-current
// -> revoke-all-except-current
//
// The sessionResponse projection type lives here alongside its
// callers (sessionToResponse + the three handler methods). It's
// the shape the API renders externally; no external caller relies
// on its exact file location.
// =============================================================================
// 2. Session management handlers (RBAC-gated).
// =============================================================================
type sessionResponse struct {
ID string `json:"id"`
ActorID string `json:"actor_id"`
ActorType string `json:"actor_type"`
IPAddress string `json:"ip_address,omitempty"`
UserAgent string `json:"user_agent,omitempty"`
CreatedAt string `json:"created_at"`
LastSeenAt string `json:"last_seen_at"`
IdleExpiresAt string `json:"idle_expires_at"`
AbsoluteExpiresAt string `json:"absolute_expires_at"`
Revoked bool `json:"revoked"`
}
func sessionToResponse(s *sessiondomain.Session) sessionResponse {
return sessionResponse{
ID: s.ID,
ActorID: s.ActorID,
ActorType: s.ActorType,
IPAddress: s.IPAddress,
UserAgent: s.UserAgent,
CreatedAt: s.CreatedAt.UTC().Format(time.RFC3339),
LastSeenAt: s.LastSeenAt.UTC().Format(time.RFC3339),
IdleExpiresAt: s.IdleExpiresAt.UTC().Format(time.RFC3339),
AbsoluteExpiresAt: s.AbsoluteExpiresAt.UTC().Format(time.RFC3339),
Revoked: s.RevokedAt != nil,
}
}
// ListSessions handles GET /api/v1/auth/sessions.
//
// Default behavior: list current actor's sessions. With
// ?actor_id=<other> + auth.session.list.all permission: list that
// actor's sessions. The permission check is at the handler layer
// (rbacGate at the router gates access to the handler entirely).
func (h *AuthSessionOIDCHandler) ListSessions(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
// Default to the caller's own sessions.
actorID := caller.ActorID
actorType := string(caller.ActorType)
if q := r.URL.Query().Get("actor_id"); q != "" && q != actorID {
// Audit 2026-05-10 MED-2 closure — listing a different
// actor's sessions requires the narrower auth.session.list.all
// permission. The router gate already enforced
// auth.session.list (the floor for any session-list call),
// but the all-actors variant is an admin-class capability and
// must be checked separately because the rbacGate can't see
// the query param. When the handler is wired with
// WithPermissionChecker (production), we re-check inline; when
// it isn't (legacy tests), the router gate's auth.session.list
// floor is the only check.
if h.checker != nil {
ok, perr := h.checker.CheckPermission(r.Context(),
caller.ActorID, string(caller.ActorType), h.tenantID,
"auth.session.list.all", "global", nil)
if perr != nil {
Error(w, http.StatusInternalServerError, "permission check failed")
return
}
if !ok {
Error(w, http.StatusForbidden, "auth.session.list.all required to list another actor's sessions")
return
}
}
actorID = q
if at := r.URL.Query().Get("actor_type"); at != "" {
actorType = at
}
}
sessions, lerr := h.sessionRepo.ListByActor(r.Context(), actorID, actorType, h.tenantID)
if lerr != nil {
Error(w, http.StatusInternalServerError, "could not list sessions")
return
}
out := make([]sessionResponse, 0, len(sessions))
for _, s := range sessions {
out = append(out, sessionToResponse(s))
}
writeJSON(w, http.StatusOK, map[string]interface{}{"sessions": out})
}
// RevokeSession handles DELETE /api/v1/auth/sessions/{id}.
func (h *AuthSessionOIDCHandler) RevokeSession(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
sessionID := r.PathValue("id")
if sessionID == "" {
Error(w, http.StatusBadRequest, "missing session id")
return
}
// Look up the session to enforce "own session OR auth.session.revoke".
sess, gerr := h.sessionRepo.Get(r.Context(), sessionID)
if gerr != nil {
if errors.Is(gerr, repository.ErrSessionNotFound) {
Error(w, http.StatusNotFound, "session not found")
return
}
Error(w, http.StatusInternalServerError, "could not load session")
return
}
// Revoking your own session is always allowed (any authenticated
// caller). Revoking someone else's session requires the
// auth.session.revoke permission — enforced at the rbacGate the
// router wraps this handler with.
if sess.ActorID == caller.ActorID && sess.ActorType == string(caller.ActorType) {
// own-session path; rbacGate's permission requirement is the
// floor; passing through is fine.
}
if rerr := h.sessionSvc.Revoke(r.Context(), sessionID); rerr != nil {
Error(w, http.StatusInternalServerError, "could not revoke session")
return
}
h.recordAudit(r.Context(), "auth.session_revoked", caller.ActorID, caller.ActorType, sessionID,
map[string]interface{}{"session_id": sessionID, "target_actor_id": sess.ActorID})
w.WriteHeader(http.StatusNoContent)
}
// RevokeAllExceptCurrent handles DELETE /api/v1/auth/sessions?except=current.
//
// Audit 2026-05-10 MED-3 closure — backs the "Sign out all other
// sessions" SessionsPage button. Revokes every active session for the
// caller EXCEPT the session that issued the current request (so the
// user doesn't get logged out by the action they just took).
//
// The current session ID is read from the request's session cookie via
// the SessionMiddleware's actor context — for Bearer-mode callers this
// is the empty string and ALL the actor's sessions are revoked (matches
// the "log me out everywhere" semantic for API-key-mode users).
//
// Audit row records the count for compliance (one summary row per
// invocation; per-session detail is implicit in the count + actor).
func (h *AuthSessionOIDCHandler) RevokeAllExceptCurrent(w http.ResponseWriter, r *http.Request) {
caller, err := callerFromRequest(r)
if err != nil {
writeAuthError(w, err)
return
}
if r.URL.Query().Get("except") != "current" {
Error(w, http.StatusBadRequest, "only ?except=current is supported")
return
}
// Current session ID — empty for Bearer/API-key callers (acceptable;
// the repo's RevokeAllExceptForActor handles "" by revoking
// literally every active session). Read from the session middleware's
// SessionFromContext helper which populates the validated session
// on the request context for cookie-mode callers.
currentSessionID := ""
if sess := sessionsvc.SessionFromContext(r.Context()); sess != nil {
currentSessionID = sess.ID
}
count, rerr := h.sessionRepo.RevokeAllExceptForActor(r.Context(),
caller.ActorID, string(caller.ActorType), h.tenantID, currentSessionID)
if rerr != nil {
Error(w, http.StatusInternalServerError, "could not revoke sessions")
return
}
h.recordAudit(r.Context(), "auth.sessions_revoked_all_except_current",
caller.ActorID, caller.ActorType, currentSessionID,
map[string]interface{}{
"count": count,
"current_session_id": currentSessionID,
})
writeJSON(w, http.StatusOK, map[string]interface{}{"revoked_count": count})
}