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OIDC back-channel logout 백엔드 전송 기능 추가

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김용연
2026-05-04 11:03:27 +09:00
parent a72df2e839
commit f9f0ed0f14
5 changed files with 539 additions and 109 deletions
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1
backend/cmd/server/main.go
View File

@@ -572,6 +572,7 @@ func main() {
auth.Post("/qr/init", authHandler.InitQRLogin)
auth.Post("/qr/poll", authHandler.PollQRLogin)
auth.Post("/qr/approve", authHandler.ScanQRLogin)
auth.Get("/backchannel/jwks.json", authHandler.GetBackchannelLogoutJWKS)
// Signup Routes
signup := auth.Group("/signup")

65
backend/internal/domain/hydra_models.go
View File

@@ -6,30 +6,34 @@ import (
)
const (
MetadataHeadlessLoginEnabled = "headless_login_enabled"
MetadataHeadlessTokenEndpointAuthMethod = "headless_token_endpoint_auth_method"
MetadataHeadlessJWKSURI = "headless_jwks_uri"
MetadataHeadlessJWKS = "headless_jwks"
MetadataRequestObjectSigningAlg = "request_object_signing_alg"
MetadataIDTokenClaims = "id_token_claims"
MetadataHeadlessLoginEnabled = "headless_login_enabled"
MetadataHeadlessTokenEndpointAuthMethod = "headless_token_endpoint_auth_method"
MetadataHeadlessJWKSURI = "headless_jwks_uri"
MetadataHeadlessJWKS = "headless_jwks"
MetadataRequestObjectSigningAlg = "request_object_signing_alg"
MetadataIDTokenClaims = "id_token_claims"
MetadataBackChannelLogoutURI = "backchannel_logout_uri"
MetadataBackChannelLogoutSessionRequired = "backchannel_logout_session_required"
MetadataAutoLoginSupported = "auto_login_supported"
MetadataAutoLoginURL = "auto_login_url"
)
type HydraClient struct {
ClientID string `json:"client_id"`
ClientName string `json:"client_name,omitempty"`
ClientSecret string `json:"client_secret,omitempty"` // Added
ClientURI string `json:"client_uri,omitempty"`
RedirectURIs []string `json:"redirect_uris,omitempty"`
GrantTypes []string `json:"grant_types,omitempty"`
ResponseTypes []string `json:"response_types,omitempty"`
Scope string `json:"scope,omitempty"`
TokenEndpointAuthMethod string `json:"token_endpoint_auth_method,omitempty"`
SkipConsent *bool `json:"skip_consent,omitempty"`
JWKSUri string `json:"jwks_uri,omitempty"`
JWKS interface{} `json:"jwks,omitempty"`
Metadata map[string]interface{} `json:"metadata,omitempty"`
ClientID string `json:"client_id"`
ClientName string `json:"client_name,omitempty"`
ClientSecret string `json:"client_secret,omitempty"` // Added
ClientURI string `json:"client_uri,omitempty"`
RedirectURIs []string `json:"redirect_uris,omitempty"`
GrantTypes []string `json:"grant_types,omitempty"`
ResponseTypes []string `json:"response_types,omitempty"`
Scope string `json:"scope,omitempty"`
TokenEndpointAuthMethod string `json:"token_endpoint_auth_method,omitempty"`
SkipConsent *bool `json:"skip_consent,omitempty"`
JWKSUri string `json:"jwks_uri,omitempty"`
JWKS interface{} `json:"jwks,omitempty"`
BackChannelLogoutURI string `json:"backchannel_logout_uri,omitempty"`
BackChannelLogoutSessionRequired *bool `json:"backchannel_logout_session_required,omitempty"`
Metadata map[string]interface{} `json:"metadata,omitempty"`
}
func (c *HydraClient) SupportsHeadlessLogin() bool {
@@ -87,6 +91,29 @@ func (c *HydraClient) IsHeadlessLoginEnabled() bool {
return false
}
func (c *HydraClient) BackchannelLogoutURI() string {
if c.Metadata != nil {
if raw, ok := c.Metadata[MetadataBackChannelLogoutURI].(string); ok {
if value := strings.TrimSpace(raw); value != "" {
return value
}
}
}
return strings.TrimSpace(c.BackChannelLogoutURI)
}
func (c *HydraClient) BackchannelLogoutSessionRequiredValue() bool {
if c.Metadata != nil {
if raw, ok := c.Metadata[MetadataBackChannelLogoutSessionRequired].(bool); ok {
return raw
}
}
if c.BackChannelLogoutSessionRequired != nil {
return *c.BackChannelLogoutSessionRequired
}
return false
}
type HydraConsentRequest struct {
Challenge string `json:"challenge"`
RequestedScope []string `json:"requested_scope"`

188
backend/internal/handler/auth_handler.go
View File

@@ -85,20 +85,21 @@ const (
)
type AuthHandler struct {
SmsService domain.SmsService
EmailService domain.EmailService
RedisService domain.RedisRepository
HeadlessJWKS *service.HeadlessJWKSCacheService
KratosAdmin service.KratosAdminService
IdpProvider domain.IdentityProvider
AuditRepo domain.AuditRepository
OathkeeperRepo domain.OathkeeperLogRepository
Hydra *service.HydraAdminService
TenantService service.TenantService
KetoService service.KetoService
KetoOutboxRepo repository.KetoOutboxRepository
UserRepo repository.UserRepository
ConsentRepo repository.ClientConsentRepository
SmsService domain.SmsService
EmailService domain.EmailService
RedisService domain.RedisRepository
HeadlessJWKS *service.HeadlessJWKSCacheService
KratosAdmin service.KratosAdminService
IdpProvider domain.IdentityProvider
AuditRepo domain.AuditRepository
OathkeeperRepo domain.OathkeeperLogRepository
Hydra *service.HydraAdminService
BackchannelLogout *service.BackchannelLogoutService
TenantService service.TenantService
KetoService service.KetoService
KetoOutboxRepo repository.KetoOutboxRepository
UserRepo repository.UserRepository
ConsentRepo repository.ClientConsentRepository
RPUserMetadataRepo repository.RPUserMetadataRepository
}
@@ -221,21 +222,26 @@ func checkPollInterval(redis domain.RedisRepository, key string, interval time.D
}
func NewAuthHandler(redisService domain.RedisRepository, idpProvider domain.IdentityProvider, auditRepo domain.AuditRepository, oathkeeperRepo domain.OathkeeperLogRepository, tenantService service.TenantService, ketoService service.KetoService, ketoOutboxRepo repository.KetoOutboxRepository, userRepo repository.UserRepository, consentRepo repository.ClientConsentRepository, kratos service.KratosAdminService) *AuthHandler {
backchannelLogout, err := service.NewBackchannelLogoutService()
if err != nil {
slog.Warn("failed to initialize backchannel logout service", "error", err)
}
return &AuthHandler{
SmsService: service.NewSmsService(),
EmailService: service.NewEmailService(),
RedisService: redisService,
HeadlessJWKS: service.NewHeadlessJWKSCacheService(redisService, nil),
KratosAdmin: kratos,
IdpProvider: idpProvider,
AuditRepo: auditRepo,
OathkeeperRepo: oathkeeperRepo,
Hydra: service.NewHydraAdminService(),
TenantService: tenantService,
KetoService: ketoService,
KetoOutboxRepo: ketoOutboxRepo,
UserRepo: userRepo,
ConsentRepo: consentRepo,
SmsService: service.NewSmsService(),
EmailService: service.NewEmailService(),
RedisService: redisService,
HeadlessJWKS: service.NewHeadlessJWKSCacheService(redisService, nil),
KratosAdmin: kratos,
IdpProvider: idpProvider,
AuditRepo: auditRepo,
OathkeeperRepo: oathkeeperRepo,
Hydra: service.NewHydraAdminService(),
BackchannelLogout: backchannelLogout,
TenantService: tenantService,
KetoService: ketoService,
KetoOutboxRepo: ketoOutboxRepo,
UserRepo: userRepo,
ConsentRepo: consentRepo,
}
}
@@ -5348,6 +5354,8 @@ func (h *AuthHandler) RevokeLinkedRp(c *fiber.Ctx) error {
})
}
h.triggerBackchannelLogoutForClient(c.Context(), c, subject, clientID, "")
return c.Status(fiber.StatusOK).JSON(fiber.Map{
"status": "success",
"message": "Link revoked successfully",
@@ -7768,6 +7776,7 @@ func (h *AuthHandler) DeleteMySession(c *fiber.Ctx) error {
if err := h.revokeHydraSessionAccess(c.Context(), profile.ID, targetSessionID); err != nil {
return errorJSON(c, fiber.StatusInternalServerError, "Failed to revoke linked app sessions")
}
h.triggerBackchannelLogoutForSession(c.Context(), c, profile.ID, targetSessionID)
h.writeSessionRevokedAuditLog(c, profile.ID, h.resolveCurrentSessionID(c), targetSessionID, result)
return c.JSON(fiber.Map{"status": "ok"})
@@ -8187,6 +8196,129 @@ func (h *AuthHandler) revokeHydraSessionAccess(ctx context.Context, userID strin
return nil
}
func (h *AuthHandler) triggerBackchannelLogoutForSession(ctx context.Context, c *fiber.Ctx, userID string, sessionID string) {
if h == nil || h.Hydra == nil {
return
}
clientIDs := h.loadSessionClientBindings(ctx, userID)[strings.TrimSpace(sessionID)]
for _, clientID := range clientIDs {
h.triggerBackchannelLogoutForClient(ctx, c, userID, clientID, sessionID)
}
}
func (h *AuthHandler) triggerBackchannelLogoutForClient(ctx context.Context, c *fiber.Ctx, userID string, clientID string, sessionID string) {
if h == nil || h.Hydra == nil || h.BackchannelLogout == nil {
return
}
clientID = strings.TrimSpace(clientID)
userID = strings.TrimSpace(userID)
sessionID = strings.TrimSpace(sessionID)
if clientID == "" || userID == "" {
return
}
client, err := h.Hydra.GetClient(ctx, clientID)
if err != nil {
h.writeBackchannelLogoutAuditLog(c, "backchannel_logout.failed", userID, clientID, sessionID, "", 0, "client_lookup_failed")
return
}
if client == nil {
h.writeBackchannelLogoutAuditLog(c, "backchannel_logout.skipped", userID, clientID, sessionID, "", 0, "client_not_found")
return
}
endpoint := client.BackchannelLogoutURI()
if endpoint == "" {
h.writeBackchannelLogoutAuditLog(c, "backchannel_logout.skipped", userID, clientID, sessionID, "", 0, "uri_not_configured")
return
}
if client.BackchannelLogoutSessionRequiredValue() && sessionID == "" {
h.writeBackchannelLogoutAuditLog(c, "backchannel_logout.skipped", userID, clientID, sessionID, endpoint, 0, "sid_required")
return
}
logoutToken, err := h.BackchannelLogout.BuildLogoutToken(clientID, userID, sessionID)
if err != nil {
h.writeBackchannelLogoutAuditLog(c, "backchannel_logout.failed", userID, clientID, sessionID, endpoint, 0, "token_build_failed")
return
}
statusCode, err := h.BackchannelLogout.SendLogoutToken(ctx, endpoint, logoutToken)
if err != nil {
h.writeBackchannelLogoutAuditLog(c, "backchannel_logout.failed", userID, clientID, sessionID, endpoint, statusCode, "request_failed")
return
}
h.writeBackchannelLogoutAuditLog(c, "backchannel_logout.sent", userID, clientID, sessionID, endpoint, statusCode, "")
}
func (h *AuthHandler) writeBackchannelLogoutAuditLog(c *fiber.Ctx, eventType string, userID string, clientID string, sessionID string, endpoint string, statusCode int, reason string) {
if h == nil || h.AuditRepo == nil {
return
}
endpointHost := ""
if endpoint != "" {
if parsed, err := url.Parse(endpoint); err == nil {
endpointHost = parsed.Host
}
}
details := map[string]any{
"client_id": strings.TrimSpace(clientID),
"session_id": strings.TrimSpace(sessionID),
"endpoint_host": strings.TrimSpace(endpointHost),
"status_code": statusCode,
"retry_count": 0,
"logout_issuer": h.BackchannelLogout.Issuer(),
}
if reason != "" {
details["reason"] = reason
}
raw, err := json.Marshal(details)
if err != nil {
return
}
status := "success"
if strings.HasSuffix(eventType, ".failed") {
status = "failure"
} else if strings.HasSuffix(eventType, ".skipped") {
status = "skipped"
}
ipAddress := ""
userAgent := ""
if c != nil {
ipAddress = extractClientIPFromHeaders(c)
userAgent = strings.TrimSpace(c.Get("User-Agent"))
}
_ = h.AuditRepo.Create(&domain.AuditLog{
EventID: fmt.Sprintf("backchannel-logout-%d", time.Now().UnixNano()),
Timestamp: time.Now().UTC(),
UserID: strings.TrimSpace(userID),
SessionID: strings.TrimSpace(sessionID),
EventType: eventType,
Status: status,
IPAddress: ipAddress,
UserAgent: userAgent,
Details: string(raw),
})
}
func (h *AuthHandler) GetBackchannelLogoutJWKS(c *fiber.Ctx) error {
if h == nil || h.BackchannelLogout == nil {
return errorJSON(c, fiber.StatusServiceUnavailable, "backchannel logout jwks unavailable")
}
c.Set(fiber.HeaderContentType, fiber.MIMEApplicationJSONCharsetUTF8)
c.Set(fiber.HeaderCacheControl, "no-store")
return c.JSON(h.BackchannelLogout.PublicJWKS())
}
func looksLikeInternalUserAgent(userAgent string) bool {
normalized := strings.ToLower(strings.TrimSpace(userAgent))
if normalized == "" {

202
backend/internal/handler/dev_handler.go
View File

@@ -94,19 +94,21 @@ type devStatsResponse struct {
}
type clientSummary struct {
ID string `json:"id"`
Name string `json:"name"`
Type string `json:"type"`
Status string `json:"status"`
CreatedAt *time.Time `json:"createdAt,omitempty"`
RedirectURIs []string `json:"redirectUris"`
Scopes []string `json:"scopes"`
ClientSecret string `json:"clientSecret,omitempty"`
TokenEndpointAuthMethod string `json:"tokenEndpointAuthMethod,omitempty"`
SkipConsent bool `json:"skipConsent"`
JwksUri string `json:"jwksUri,omitempty"`
Jwks interface{} `json:"jwks,omitempty"`
Metadata map[string]interface{} `json:"metadata,omitempty"`
ID string `json:"id"`
Name string `json:"name"`
Type string `json:"type"`
Status string `json:"status"`
CreatedAt *time.Time `json:"createdAt,omitempty"`
RedirectURIs []string `json:"redirectUris"`
Scopes []string `json:"scopes"`
ClientSecret string `json:"clientSecret,omitempty"`
TokenEndpointAuthMethod string `json:"tokenEndpointAuthMethod,omitempty"`
SkipConsent bool `json:"skipConsent"`
JwksUri string `json:"jwksUri,omitempty"`
Jwks interface{} `json:"jwks,omitempty"`
BackchannelLogoutURI string `json:"backchannelLogoutUri,omitempty"`
BackchannelLogoutSessionRequired bool `json:"backchannelLogoutSessionRequired"`
Metadata map[string]interface{} `json:"metadata,omitempty"`
}
type clientListResponse struct {
@@ -179,19 +181,21 @@ type consentListResponse struct {
}
type clientUpsertRequest struct {
ID *string `json:"id"`
Name *string `json:"name"`
Type *string `json:"type"`
Status *string `json:"status"`
RedirectURIs *[]string `json:"redirectUris"`
Scopes *[]string `json:"scopes"`
GrantTypes *[]string `json:"grantTypes"`
ResponseTypes *[]string `json:"responseTypes"`
TokenEndpointAuthMethod *string `json:"tokenEndpointAuthMethod"`
SkipConsent *bool `json:"skipConsent"`
JwksUri *string `json:"jwksUri"`
Jwks interface{} `json:"jwks"`
Metadata *map[string]interface{} `json:"metadata"`
ID *string `json:"id"`
Name *string `json:"name"`
Type *string `json:"type"`
Status *string `json:"status"`
RedirectURIs *[]string `json:"redirectUris"`
Scopes *[]string `json:"scopes"`
GrantTypes *[]string `json:"grantTypes"`
ResponseTypes *[]string `json:"responseTypes"`
TokenEndpointAuthMethod *string `json:"tokenEndpointAuthMethod"`
SkipConsent *bool `json:"skipConsent"`
JwksUri *string `json:"jwksUri"`
Jwks interface{} `json:"jwks"`
BackchannelLogoutURI *string `json:"backchannelLogoutUri"`
BackchannelLogoutSessionRequired *bool `json:"backchannelLogoutSessionRequired"`
Metadata *map[string]interface{} `json:"metadata"`
}
type normalizedIDTokenClaim struct {
@@ -1679,9 +1683,15 @@ func (h *DevHandler) CreateClient(c *fiber.Ctx) error {
if tenantID != "" {
metadata["tenant_id"] = tenantID
}
var err error
metadata["status"] = status
metadata["created_at"] = time.Now().Format(time.RFC3339)
var err error
backchannelLogoutURI := strings.TrimSpace(valueOr(req.BackchannelLogoutURI, ""))
backchannelLogoutSessionRequired := valueOrBool(req.BackchannelLogoutSessionRequired, false)
metadata, err = normalizeBackchannelLogoutMetadata(metadata, backchannelLogoutURI, backchannelLogoutSessionRequired)
if err != nil {
return errorJSON(c, fiber.StatusBadRequest, err.Error())
}
metadata, err = normalizeClientTenantAccessMetadata(metadata)
if err != nil {
return errorJSON(c, fiber.StatusBadRequest, err.Error())
@@ -1711,17 +1721,19 @@ func (h *DevHandler) CreateClient(c *fiber.Ctx) error {
)
clientReq := domain.HydraClient{
ClientID: clientID,
ClientName: name,
RedirectURIs: redirectURIs,
GrantTypes: grantTypes,
ResponseTypes: responseTypes,
Scope: strings.Join(scopes, " "),
TokenEndpointAuthMethod: tokenAuthMethod,
SkipConsent: boolPtr(valueOrBool(req.SkipConsent, true)),
JWKSUri: jwksURI,
JWKS: jwks,
Metadata: metadata,
ClientID: clientID,
ClientName: name,
RedirectURIs: redirectURIs,
GrantTypes: grantTypes,
ResponseTypes: responseTypes,
Scope: strings.Join(scopes, " "),
TokenEndpointAuthMethod: tokenAuthMethod,
SkipConsent: boolPtr(valueOrBool(req.SkipConsent, true)),
JWKSUri: jwksURI,
JWKS: jwks,
BackChannelLogoutURI: backchannelLogoutURI,
BackChannelLogoutSessionRequired: boolPtr(backchannelLogoutSessionRequired),
Metadata: metadata,
}
h.setAuditDetailsExtra(c, map[string]any{
@@ -1866,6 +1878,16 @@ func (h *DevHandler) UpdateClient(c *fiber.Ctx) error {
}
metadata["status"] = status
}
resolvedBackchannelLogoutURI := valueOr(req.BackchannelLogoutURI, current.BackchannelLogoutURI())
resolvedBackchannelLogoutSessionRequired := valueOrBool(req.BackchannelLogoutSessionRequired, current.BackchannelLogoutSessionRequiredValue())
metadata, err = normalizeBackchannelLogoutMetadata(
metadata,
resolvedBackchannelLogoutURI,
resolvedBackchannelLogoutSessionRequired,
)
if err != nil {
return errorJSON(c, fiber.StatusBadRequest, err.Error())
}
metadata, err = normalizeClientTenantAccessMetadata(metadata)
if err != nil {
return errorJSON(c, fiber.StatusBadRequest, err.Error())
@@ -1901,17 +1923,19 @@ func (h *DevHandler) UpdateClient(c *fiber.Ctx) error {
resolvedSkipConsent := valueOrBool(req.SkipConsent, valueOrBool(current.SkipConsent, true))
updated := domain.HydraClient{
ClientID: current.ClientID,
ClientName: valueOr(req.Name, current.ClientName),
RedirectURIs: derefSlice(req.RedirectURIs, current.RedirectURIs),
GrantTypes: derefSlice(req.GrantTypes, current.GrantTypes),
ResponseTypes: derefSlice(req.ResponseTypes, current.ResponseTypes),
Scope: buildScope(valueOrSlice(req.Scopes, strings.Fields(current.Scope))),
TokenEndpointAuthMethod: resolvedTokenAuthMethod,
SkipConsent: boolPtr(resolvedSkipConsent),
JWKSUri: resolvedJWKSURI,
JWKS: resolvedJWKS,
Metadata: metadata,
ClientID: current.ClientID,
ClientName: valueOr(req.Name, current.ClientName),
RedirectURIs: derefSlice(req.RedirectURIs, current.RedirectURIs),
GrantTypes: derefSlice(req.GrantTypes, current.GrantTypes),
ResponseTypes: derefSlice(req.ResponseTypes, current.ResponseTypes),
Scope: buildScope(valueOrSlice(req.Scopes, strings.Fields(current.Scope))),
TokenEndpointAuthMethod: resolvedTokenAuthMethod,
SkipConsent: boolPtr(resolvedSkipConsent),
JWKSUri: resolvedJWKSURI,
JWKS: resolvedJWKS,
BackChannelLogoutURI: strings.TrimSpace(resolvedBackchannelLogoutURI),
BackChannelLogoutSessionRequired: boolPtr(resolvedBackchannelLogoutSessionRequired),
Metadata: metadata,
}
if err := validateReservedSystemClientName(updated.ClientID, updated.ClientName); err != nil {
return errorJSON(c, fiber.StatusForbidden, err.Error())
@@ -2651,19 +2675,21 @@ func (h *DevHandler) mapClientSummary(client domain.HydraClient) clientSummary {
}
return clientSummary{
ID: client.ClientID,
Name: name,
Type: clientType,
Status: status,
CreatedAt: createdAt,
RedirectURIs: client.RedirectURIs,
Scopes: scopes,
ClientSecret: clientSecret,
TokenEndpointAuthMethod: client.TokenEndpointAuthMethod,
SkipConsent: valueOrBool(client.SkipConsent, true),
JwksUri: client.JWKSUri,
Jwks: client.JWKS,
Metadata: client.Metadata,
ID: client.ClientID,
Name: name,
Type: clientType,
Status: status,
CreatedAt: createdAt,
RedirectURIs: client.RedirectURIs,
Scopes: scopes,
ClientSecret: clientSecret,
TokenEndpointAuthMethod: client.TokenEndpointAuthMethod,
SkipConsent: valueOrBool(client.SkipConsent, true),
JwksUri: client.JWKSUri,
Jwks: client.JWKS,
BackchannelLogoutURI: client.BackchannelLogoutURI(),
BackchannelLogoutSessionRequired: client.BackchannelLogoutSessionRequiredValue(),
Metadata: client.Metadata,
}
}
@@ -2683,6 +2709,58 @@ func readMetadataBoolValue(metadata map[string]interface{}, key string) bool {
return value
}
func normalizeBackchannelLogoutMetadata(metadata map[string]interface{}, logoutURI string, sessionRequired bool) (map[string]interface{}, error) {
if metadata == nil {
metadata = map[string]interface{}{}
}
trimmedURI := strings.TrimSpace(logoutURI)
if err := validateBackchannelLogoutURI(trimmedURI); err != nil {
return nil, err
}
if trimmedURI == "" {
delete(metadata, domain.MetadataBackChannelLogoutURI)
delete(metadata, domain.MetadataBackChannelLogoutSessionRequired)
return metadata, nil
}
metadata[domain.MetadataBackChannelLogoutURI] = trimmedURI
metadata[domain.MetadataBackChannelLogoutSessionRequired] = sessionRequired
return metadata, nil
}
func validateBackchannelLogoutURI(raw string) error {
trimmed := strings.TrimSpace(raw)
if trimmed == "" {
return nil
}
parsed, err := url.Parse(trimmed)
if err != nil || parsed == nil {
return fmt.Errorf("backchannelLogoutUri must be a valid absolute URL")
}
if parsed.Scheme == "" || parsed.Host == "" {
return fmt.Errorf("backchannelLogoutUri must be a valid absolute URL")
}
if parsed.Fragment != "" {
return fmt.Errorf("backchannelLogoutUri must not include a fragment")
}
switch strings.ToLower(parsed.Scheme) {
case "https":
return nil
case "http":
host := strings.ToLower(parsed.Hostname())
if host == "localhost" || host == "127.0.0.1" {
return nil
}
return fmt.Errorf("backchannelLogoutUri must use https outside localhost development")
default:
return fmt.Errorf("backchannelLogoutUri must use http or https")
}
}
func normalizeClientAutoLoginMetadata(metadata map[string]interface{}) (map[string]interface{}, error) {
if metadata == nil {
return metadata, nil

192
backend/internal/service/backchannel_logout_service.go Normal file
View File

@@ -0,0 +1,192 @@
package service
import (
"context"
"crypto/rand"
"crypto/rsa"
"encoding/hex"
"encoding/json"
"fmt"
"net"
"net/http"
"net/url"
"os"
"strings"
"time"
"github.com/go-jose/go-jose/v4"
josejwt "github.com/go-jose/go-jose/v4/jwt"
)
const backchannelLogoutEventURI = "http://schemas.openid.net/event/backchannel-logout"
type BackchannelLogoutService struct {
issuer string
keyID string
signer jose.Signer
publicJWK jose.JSONWebKey
client *http.Client
HTTPClient *http.Client
}
func NewBackchannelLogoutService() (*BackchannelLogoutService, error) {
privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
return nil, fmt.Errorf("failed to generate backchannel logout key: %w", err)
}
keyID := randomBackchannelKeyID()
if keyID == "" {
keyID = fmt.Sprintf("bcl-%d", time.Now().UnixNano())
}
signer, err := jose.NewSigner(jose.SigningKey{
Algorithm: jose.RS256,
Key: jose.JSONWebKey{
Key: privateKey,
KeyID: keyID,
Algorithm: string(jose.RS256),
Use: "sig",
},
}, (&jose.SignerOptions{}).WithType("JWT"))
if err != nil {
return nil, fmt.Errorf("failed to initialize backchannel logout signer: %w", err)
}
return &BackchannelLogoutService{
issuer: resolveBackchannelLogoutIssuer(),
keyID: keyID,
signer: signer,
publicJWK: jose.JSONWebKey{
Key: &privateKey.PublicKey,
KeyID: keyID,
Algorithm: string(jose.RS256),
Use: "sig",
},
client: &http.Client{
Timeout: 5 * time.Second,
Transport: &http.Transport{
DialContext: (&net.Dialer{
Timeout: 3 * time.Second,
KeepAlive: 30 * time.Second,
}).DialContext,
TLSHandshakeTimeout: 3 * time.Second,
},
},
}, nil
}
func randomBackchannelKeyID() string {
buf := make([]byte, 8)
if _, err := rand.Read(buf); err != nil {
return ""
}
return hex.EncodeToString(buf)
}
func resolveBackchannelLogoutIssuer() string {
if explicit := strings.TrimSpace(os.Getenv("BACKCHANNEL_LOGOUT_ISSUER")); explicit != "" {
return strings.TrimRight(explicit, "/")
}
if hydraPublic := strings.TrimSpace(os.Getenv("HYDRA_PUBLIC_URL")); hydraPublic != "" {
return strings.TrimRight(hydraPublic, "/")
}
if oathkeeperPublic := strings.TrimSpace(os.Getenv("OATHKEEPER_PUBLIC_URL")); oathkeeperPublic != "" {
return strings.TrimRight(oathkeeperPublic, "/") + "/oidc"
}
if userfrontURL := strings.TrimSpace(os.Getenv("USERFRONT_URL")); userfrontURL != "" {
return strings.TrimRight(userfrontURL, "/") + "/oidc"
}
return "http://localhost:5000/oidc"
}
func (s *BackchannelLogoutService) Issuer() string {
if s == nil {
return ""
}
return s.issuer
}
func (s *BackchannelLogoutService) PublicJWKS() map[string]any {
if s == nil {
return map[string]any{"keys": []any{}}
}
return map[string]any{
"keys": []jose.JSONWebKey{s.publicJWK.Public()},
}
}
func (s *BackchannelLogoutService) BuildLogoutToken(clientID, subject, sessionID string) (string, error) {
if s == nil || s.signer == nil {
return "", fmt.Errorf("backchannel logout service is unavailable")
}
clientID = strings.TrimSpace(clientID)
subject = strings.TrimSpace(subject)
sessionID = strings.TrimSpace(sessionID)
if clientID == "" {
return "", fmt.Errorf("client id is required")
}
if subject == "" && sessionID == "" {
return "", fmt.Errorf("subject or session id is required")
}
now := time.Now().UTC()
claims := josejwt.Claims{
Issuer: s.issuer,
Audience: josejwt.Audience{clientID},
IssuedAt: josejwt.NewNumericDate(now),
ID: fmt.Sprintf("%s-%d", s.keyID, now.UnixNano()),
}
if subject != "" {
claims.Subject = subject
}
extra := map[string]any{
"events": map[string]any{
backchannelLogoutEventURI: map[string]any{},
},
}
if sessionID != "" {
extra["sid"] = sessionID
}
return josejwt.Signed(s.signer).Claims(claims).Claims(extra).Serialize()
}
func (s *BackchannelLogoutService) SendLogoutToken(ctx context.Context, endpoint, logoutToken string) (int, error) {
if s == nil {
return 0, fmt.Errorf("backchannel logout service is unavailable")
}
form := url.Values{}
form.Set("logout_token", logoutToken)
req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, strings.NewReader(form.Encode()))
if err != nil {
return 0, err
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
req.Header.Set("Accept", "application/json")
client := s.client
if s.HTTPClient != nil {
client = s.HTTPClient
}
resp, err := client.Do(req)
if err != nil {
return 0, err
}
defer resp.Body.Close()
if resp.StatusCode < 200 || resp.StatusCode >= 300 {
return resp.StatusCode, fmt.Errorf("backchannel logout endpoint returned status %d", resp.StatusCode)
}
return resp.StatusCode, nil
}
func (s *BackchannelLogoutService) MarshalPublicJWKS() ([]byte, error) {
return json.Marshal(s.PublicJWKS())
}