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matej
2025-09-01 22:12:29 +02:00
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server/node_modules/firebase-admin/lib/auth/token-generator.js generated vendored Normal file
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/*! firebase-admin v13.5.0 */
"use strict";
/*!
* @license
* Copyright 2017 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.FirebaseTokenGenerator = exports.EmulatedSigner = exports.BLACKLISTED_CLAIMS = void 0;
exports.handleCryptoSignerError = handleCryptoSignerError;
const error_1 = require("../utils/error");
const crypto_signer_1 = require("../utils/crypto-signer");
const validator = require("../utils/validator");
const utils_1 = require("../utils");
const ALGORITHM_NONE = 'none';
const ONE_HOUR_IN_SECONDS = 60 * 60;
// List of blacklisted claims which cannot be provided when creating a custom token
exports.BLACKLISTED_CLAIMS = [
'acr', 'amr', 'at_hash', 'aud', 'auth_time', 'azp', 'cnf', 'c_hash', 'exp', 'iat', 'iss', 'jti',
'nbf', 'nonce',
];
// Audience to use for Firebase Auth Custom tokens
const FIREBASE_AUDIENCE = 'https://identitytoolkit.googleapis.com/google.identity.identitytoolkit.v1.IdentityToolkit';
/**
* A CryptoSigner implementation that is used when communicating with the Auth emulator.
* It produces unsigned tokens.
*/
class EmulatedSigner {
constructor() {
this.algorithm = ALGORITHM_NONE;
}
/**
* @inheritDoc
*/
// eslint-disable-next-line @typescript-eslint/no-unused-vars
sign(buffer) {
return Promise.resolve(Buffer.from(''));
}
/**
* @inheritDoc
*/
getAccountId() {
return Promise.resolve('firebase-auth-emulator@example.com');
}
}
exports.EmulatedSigner = EmulatedSigner;
/**
* Class for generating different types of Firebase Auth tokens (JWTs).
*
* @internal
*/
class FirebaseTokenGenerator {
/**
* @param tenantId - The tenant ID to use for the generated Firebase Auth
* Custom token. If absent, then no tenant ID claim will be set in the
* resulting JWT.
*/
constructor(signer, tenantId) {
this.tenantId = tenantId;
if (!validator.isNonNullObject(signer)) {
throw new error_1.FirebaseAuthError(error_1.AuthClientErrorCode.INVALID_CREDENTIAL, 'INTERNAL ASSERT: Must provide a CryptoSigner to use FirebaseTokenGenerator.');
}
if (typeof this.tenantId !== 'undefined' && !validator.isNonEmptyString(this.tenantId)) {
throw new error_1.FirebaseAuthError(error_1.AuthClientErrorCode.INVALID_ARGUMENT, '`tenantId` argument must be a non-empty string.');
}
this.signer = signer;
}
/**
* Creates a new Firebase Auth Custom token.
*
* @param uid - The user ID to use for the generated Firebase Auth Custom token.
* @param developerClaims - Optional developer claims to include in the generated Firebase
* Auth Custom token.
* @returns A Promise fulfilled with a Firebase Auth Custom token signed with a
* service account key and containing the provided payload.
*/
createCustomToken(uid, developerClaims) {
let errorMessage;
if (!validator.isNonEmptyString(uid)) {
errorMessage = '`uid` argument must be a non-empty string uid.';
}
else if (uid.length > 128) {
errorMessage = '`uid` argument must a uid with less than or equal to 128 characters.';
}
else if (!this.isDeveloperClaimsValid_(developerClaims)) {
errorMessage = '`developerClaims` argument must be a valid, non-null object containing the developer claims.';
}
if (errorMessage) {
throw new error_1.FirebaseAuthError(error_1.AuthClientErrorCode.INVALID_ARGUMENT, errorMessage);
}
const claims = {};
if (typeof developerClaims !== 'undefined') {
for (const key in developerClaims) {
/* istanbul ignore else */
if (Object.prototype.hasOwnProperty.call(developerClaims, key)) {
if (exports.BLACKLISTED_CLAIMS.indexOf(key) !== -1) {
throw new error_1.FirebaseAuthError(error_1.AuthClientErrorCode.INVALID_ARGUMENT, `Developer claim "${key}" is reserved and cannot be specified.`);
}
claims[key] = developerClaims[key];
}
}
}
return this.signer.getAccountId().then((account) => {
const header = {
alg: this.signer.algorithm,
typ: 'JWT',
};
const iat = Math.floor(Date.now() / 1000);
const body = {
aud: FIREBASE_AUDIENCE,
iat,
exp: iat + ONE_HOUR_IN_SECONDS,
iss: account,
sub: account,
uid,
};
if (this.tenantId) {
body.tenant_id = this.tenantId;
}
if (Object.keys(claims).length > 0) {
body.claims = claims;
}
const token = `${this.encodeSegment(header)}.${this.encodeSegment(body)}`;
const signPromise = this.signer.sign(Buffer.from(token));
return Promise.all([token, signPromise]);
}).then(([token, signature]) => {
return `${token}.${this.encodeSegment(signature)}`;
}).catch((err) => {
throw handleCryptoSignerError(err);
});
}
encodeSegment(segment) {
const buffer = (segment instanceof Buffer) ? segment : Buffer.from(JSON.stringify(segment));
return (0, utils_1.toWebSafeBase64)(buffer).replace(/=+$/, '');
}
/**
* Returns whether or not the provided developer claims are valid.
*
* @param developerClaims - Optional developer claims to validate.
* @returns True if the provided claims are valid; otherwise, false.
*/
// eslint-disable-next-line @typescript-eslint/naming-convention
isDeveloperClaimsValid_(developerClaims) {
if (typeof developerClaims === 'undefined') {
return true;
}
return validator.isNonNullObject(developerClaims);
}
}
exports.FirebaseTokenGenerator = FirebaseTokenGenerator;
/**
* Creates a new FirebaseAuthError by extracting the error code, message and other relevant
* details from a CryptoSignerError.
*
* @param err - The Error to convert into a FirebaseAuthError error
* @returns A Firebase Auth error that can be returned to the user.
*/
function handleCryptoSignerError(err) {
if (!(err instanceof crypto_signer_1.CryptoSignerError)) {
return err;
}
if (err.code === crypto_signer_1.CryptoSignerErrorCode.SERVER_ERROR && validator.isNonNullObject(err.cause)) {
const httpError = err.cause;
const errorResponse = httpError.response.data;
if (validator.isNonNullObject(errorResponse) && errorResponse.error) {
const errorCode = errorResponse.error.status;
const description = 'Please refer to https://firebase.google.com/docs/auth/admin/create-custom-tokens ' +
'for more details on how to use and troubleshoot this feature.';
const errorMsg = `${errorResponse.error.message}; ${description}`;
return error_1.FirebaseAuthError.fromServerError(errorCode, errorMsg, errorResponse);
}
return new error_1.FirebaseAuthError(error_1.AuthClientErrorCode.INTERNAL_ERROR, 'Error returned from server: ' + errorResponse + '. Additionally, an ' +
'internal error occurred while attempting to extract the ' +
'errorcode from the error.');
}
return new error_1.FirebaseAuthError(mapToAuthClientErrorCode(err.code), err.message);
}
function mapToAuthClientErrorCode(code) {
switch (code) {
case crypto_signer_1.CryptoSignerErrorCode.INVALID_CREDENTIAL:
return error_1.AuthClientErrorCode.INVALID_CREDENTIAL;
case crypto_signer_1.CryptoSignerErrorCode.INVALID_ARGUMENT:
return error_1.AuthClientErrorCode.INVALID_ARGUMENT;
default:
return error_1.AuthClientErrorCode.INTERNAL_ERROR;
}
}