Add identity tokens

src/util/identity-token.ts

@@ -0,0 +1,41 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2022 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { SignJWT } from 'jose'
+import { config } from '../config'
+
+export async function createIdentityToken({ purpose, familyId, userId, mail }: {
+  purpose: string
+  familyId: string
+  userId: string
+  mail: string
+}) {
+  if (config.signSecret === '') throw new MissingSignSecretException()
+
+  const jwt = await new SignJWT({ purpose, familyId, userId, mail })
+    .setExpirationTime('7d')
+    .setProtectedHeader({ alg: 'HS512' })
+    .sign(Buffer.from(config.signSecret, 'utf8'))
+
+  return Buffer.from(jwt, 'ascii')
+    .toString('base64')
+    .split(/(.{32})/)
+    .filter((item) => item.length > 0)
+    .join('\n')
+}
+
+export class MissingSignSecretException extends Error {}