feat(server): added backchannel logout api endpoint (#26235)

* feat(server): added backchannel logout api endpoint

* test(server): fixed e2e tests

* fix(server): fixed suggested changes by reviewer

* feat(server): created function invalidateOAuth

* fix(server): fixed session.repository.sql

* test(server): added unit tests for backchannelLogout function

* test(server): added e2e tests for oidc backchnnel logout

* docs(server): added documentation on backchannel logout url

* docs(server): fixed typo

* feat(server): minor improvements of the oidc backchannel logout

* test(server): fixed tests after merge with main

* fix(server): fixed e2e test file

* refactor(server): tiny refactor of validateLogoutToken

* chore: cleanup

* fix: tests

* fix: make jwks extractable

---------

Co-authored-by: Daniel Dietzler <mail@ddietzler.dev>

e2e-auth-server/auth-server.ts

@@ -1,5 +1,12 @@
-import { exportJWK, generateKeyPair } from 'jose';
+import {
+  calculateJwkThumbprint,
+  exportJWK,
+  importPKCS8,
+  importSPKI,
+  SignJWT,
+} from 'jose';
 import Provider from 'oidc-provider';
+import { PRIVATE_KEY_PEM, PUBLIC_KEY_PEM } from './test-keys';
 
 export enum OAuthClient {
   DEFAULT = 'client-default',
@@ -44,6 +51,29 @@ const claims = [
   },
 ];
 
+const privateKey = await importPKCS8(PRIVATE_KEY_PEM, 'RS256', {
+  extractable: true,
+});
+const publicKey = await importSPKI(PUBLIC_KEY_PEM, 'RS256', {
+  extractable: true,
+});
+const kid = await calculateJwkThumbprint(await exportJWK(publicKey));
+
+export async function generateLogoutToken(iss: string, sub: string) {
+  return await new SignJWT({
+    iss: iss,
+    aud: OAuthClient.DEFAULT,
+    iat: Math.floor(Date.now() / 1000),
+    jti: crypto.randomUUID(),
+    sub: sub,
+    events: {
+      'http://schemas.openid.net/event/backchannel-logout': {},
+    },
+  })
+    .setProtectedHeader({ alg: 'RS256', typ: 'logout+jwt', kid: kid })
+    .sign(privateKey);
+}
+
 const withDefaultClaims = (sub: string) => ({
   sub,
   email: `${sub}@immich.app`,
@@ -66,10 +96,6 @@ const getClaims = (sub: string, use?: string) => {
 };
 
 const setup = async () => {
-  const { privateKey, publicKey } = await generateKeyPair('RS256', {
-    extractable: true,
-  });
-
   const redirectUris = [
     'http://127.0.0.1:2285/auth/login',
     'https://photos.immich.app/oauth/mobile-redirect',

e2e-auth-server/test-keys.ts

@@ -0,0 +1,38 @@
+export const PRIVATE_KEY_PEM = `-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----`;
+
+export const PUBLIC_KEY_PEM = `-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlY+Qu4czdxNhzk3Cfgzf
+3tjUk0BY+Kz8pc+CfMY5vBLO5dJNpCuRBBr1DVRmW8O7NOeXPupMD/XqoAeVxRO/
+tuhXKtbKLuk25t9dJFOHZzFuZdgoMK4Whsm9aTcrGqNADC0+tHRWKrVMJ4WvXHgr
+GvmVNSa5J1X96zjbaaQb4VqCOwjvV19ZHlUNLpxz8wllI6V08wvDhhG5gdsO2SFH
+/DnyZHeUWeDrSKTC+9VvZ9d2g8U+dMdvxFv6RSxbUP6GpXjih6b5UVw0V1vOhuJq
+FCcpt4BzFzFI9mjnBRtlCZ6S67is94uamcGIk0ZQT+jvRCEDQlbWMXIbjVdQgnAV
+NQIDAQAB
+-----END PUBLIC KEY-----`;