google_cloud_auth

Authentication and credential management for Google Cloud.

Note

This package is currently experimental and published under the labs.dart.dev pub publisher in order to solicit feedback.

For packages in the labs.dart.dev publisher we generally plan to either graduate the package into a supported publisher (dart.dev, tools.dart.dev) after a period of feedback and iteration, or discontinue the package. These packages have a much higher expected rate of API and breaking changes.

Your feedback is valuable and will help us evolve this package. For general feedback, suggestions, and comments, please file an issue in the bug tracker.

Features

• Service Account Credentials: Load service account credentials from a JSON file, JSON string, parsed map, or PKCS#8 PEM private key.
• Cryptographic Signing: Sign arbitrary payloads using RSASSA-PKCS1-v1_5 with SHA-256 using the service account private key.

Usage

Loading Service Account Credentials

import 'dart:convert';
import 'dart:io';

import 'package:google_cloud_auth/google_cloud_auth.dart';

Future<void> main(List<String> args) async {
  if (args.isEmpty) {
    stderr.writeln(
      'Usage: dart run example/main.dart <path-to-service-account.json>',
    );
    exitCode = 1;
    return;
  }

  final path = args.first;
  final credentials = await ServiceAccountCredentials.fromServiceAccountFile(
    path,
  );

  print('Service Account Email : ${credentials.clientEmail}');
  print('Project ID            : ${credentials.projectId ?? '(not set)'}');
  print('Client ID             : ${credentials.clientId ?? '(not set)'}');
  print('Private Key ID        : ${credentials.privateKeyId ?? '(not set)'}');
  print('Token URI             : ${credentials.tokenUri}');
  print('Universe Domain       : ${credentials.universeDomain}');

  final sampleMessage = utf8.encode('Hello from google_cloud_auth');
  final signature = await credentials.sign(sampleMessage);
  print(
    'Sample Signature (b64): ${base64.encode(signature).substring(0, 32)}...',
  );
}