entra_id_dart_auth_sdk 0.0.4

A Dart SDK for Entra Id Authentication, enabling secure server-side authentication and user management for Dart-based backend applications.

Entra Id Dart Auth SDK

Entra Id Dart Auth SDK provides Dart-first building blocks for Microsoft Entra ID authentication flows, token handling, caching, and request utilities. The package currently exposes low-level and mid-level APIs for confidential-client flows, authorization URL generation, serialization, HTTP helpers, and cache primitives.

Features

The package does not yet provide a fully complete Entra ID surface. The table below reflects the current exported SDK behavior.

Capability	Status	Notes
Configuration via EntraIdConfiguration	Supported	Shared SDK configuration object.
HTTP method and status helpers	Supported	Includes GET, POST, PUT, DELETE, PATCH, OPTIONS, and HEAD.
HTTP client wrapper	Supported	Request helpers available through EntraIdHttpClient.
Client credentials with client secret	Supported	Available through EntraIdClientCredentialRequest and EntraIdConfidentialClientApplication.
Client credentials with client assertion	Supported	Assertion-based token exchange is supported.
Client credentials with certificate	Not supported	EntraIdConfidentialClientApplication currently throws UnsupportedError for certificate credentials.
Refresh token request	Supported	Available through EntraIdRefreshTokenRequest.
Authorization URL generation	Supported	Available through EntraIdAuthorizationUrlRequest.
Interactive request orchestration	Partial	URL generation and callback validation exist, but the full interactive token exchange is not complete.
Public client application	Partial	Class is exported, but current token methods still use placeholder return values.
Silent flow request	Partial	Cache lookup exists, but refresh behavior still needs hardening.
Device code flow	Partial	Request/response helpers exist, but polling/token acquisition is not fully implemented.
On-behalf-of flow	Not supported	EntraIdOnBehalfOfRequest is exported but token exchange is not yet implemented.
Token cache abstractions	Supported	Includes cache store, cache options, token cache base class, and in-memory token cache.
Serialization entities and serializer	Supported	Access token, refresh token, ID token, app metadata, serializer, and deserializer are exported.
Utility helpers	Supported	Includes encoding, GUID generation, hashing, and network retry helpers.

Installation

Add the package to your project:

dart pub add entra_id_dart_auth_sdk

Or add it manually to pubspec.yaml:

dependencies:
  entra_id_dart_auth_sdk: ^0.0.4

Then install dependencies:

dart pub get

Getting Started

Import the package:

import 'package:entra_id_dart_auth_sdk/entra_id_dart_auth_sdk.dart';

Create shared configuration:

final config = EntraIdConfiguration.initialize(
  clientId: 'your-client-id',
  tenantId: 'your-tenant-id',
  authority: 'https://login.microsoftonline.com',
  redirectUri: 'https://localhost:3000/auth/callback',
);

Examples

Client Credentials Flow With Client Secret

final request = EntraIdClientCredentialRequest(
  clientId: 'your-client-id',
  clientSecret: 'your-client-secret',
  authority: 'https://login.microsoftonline.com',
  tenantId: 'your-tenant-id',
  scopes: const ['https://graph.microsoft.com/.default'],
);

final token = await request.acquireToken();
print(token['access_token']);

Client Credentials Flow With Client Assertion

final request = EntraIdClientCredentialRequest.assertion(
  clientId: 'your-client-id',
  clientAssertion: 'signed-jwt-assertion',
  authority: 'https://login.microsoftonline.com',
  tenantId: 'your-tenant-id',
  scopes: const ['https://management.azure.com/.default'],
);

final token = await request.acquireToken();
print(token['access_token']);

Confidential Client Application Wrapper

final app = EntraIdConfidentialClientApplication(
  clientId: 'your-client-id',
  authority: 'https://login.microsoftonline.com/your-tenant-id',
  credential: 'your-client-secret',
  scopes: const ['https://graph.microsoft.com/.default'],
);

final token = await app.acquireToken();
print(token['access_token']);

Build An Authorization URL

final urlRequest = EntraIdAuthorizationUrlRequest(
  authorityUrl:
      'https://login.microsoftonline.com/common/oauth2/v2.0/authorize',
  parameters: AuthorizationUrlRequestParameters(
    clientId: 'your-client-id',
    redirectUri: 'https://localhost:3000/auth/callback',
    scopes: const ['openid', 'profile', 'offline_access'],
  ),
);

final authorizationUrl = urlRequest.buildUrl();
print(authorizationUrl);

Refresh A Token

final refreshRequest = EntraIdRefreshTokenRequest(
  refreshToken: 'existing-refresh-token',
  clientId: 'your-client-id',
  clientSecret: 'your-client-secret',
  tokenEndpoint:
      'https://login.microsoftonline.com/your-tenant-id/oauth2/v2.0/token',
);

final refreshed = await refreshRequest.refresh();
print(refreshed['access_token']);

Cache Arbitrary Token Data

final cache = EntraIdCacheKVStore(
  EntraIdCacheOptions(namespace: 'entra-id-demo'),
);

await cache.set('graph-token', {
  'access_token': 'token-value',
  'expires_in': 3600,
});

final cachedToken = await cache.get('graph-token');
print(cachedToken);

Current Limitations

• Do not rely on EntraIdPublicClientApplication for production interactive or device-code flows yet; those methods still return placeholder values.
• Do not rely on EntraIdOnBehalfOfRequest yet; the token exchange path is not implemented.
• Do not use certificate credentials with EntraIdConfidentialClientApplication yet; only secret and assertion flows are currently usable.
• Treat the interactive, silent, and device-code helpers as partial building blocks until the remaining flow logic is completed.

Available Versions / Sample Apps

Entra Id Dart Auth SDK is currently published as a single package version. The repository also contains sample app placeholders under /example for future end-to-end flow validation across Dart, Flutter, and web scenarios.

Documentation

For detailed guides, API references, and migration notes, visit the GitBook documentation:

Entra Id Dart Auth SDK Documentation

Examples Directory

Explore the /example directory in this repository for package integration scaffolding and sample-app placeholders.

Contributing

Contributions are welcome. If you want to improve the SDK, open an issue or submit a pull request against this repository.

Support

For support across Aortem open-source products, visit Aortem Support.

Licensing

This package is licensed under the BSD-3 license. See LICENSE for details.