ADAL v3：如何使用 UserPasswordCredential 进行身份验证？

Question

ADAL v3 具有 UserPasswordCredential 类，但我找不到有效的实现。没有接受 UserPasswordCredential 或 UserCredential 类型的 AcquireToken 重载。在 ADAL v3 中执行用户名和密码流的正确方法是什么？这段特定的代码使用完整的 .Net 4.5。

Answer 1

为了详细说明已接受答案的第二部分，这里是发出 POST 请求的实现：

    From SettingHelper: public static string GetAuthorityEndpoint(string azuretenantId) => $"https://login.microsoftonline.com/{azuretenantId}/";

    private static async Task<OAuthResult> AuthenticateAsync(string resource = "https://yourAzureADProtectedResource.url/")
    {
        var oauthEndpoint = new Uri(new Uri(SettingsHelper.GetAuthorityEndpoint("your AAD Tenent ID")), "oauth2/token");

        using (var client = new HttpClient())
        {
            var result = await client.PostAsync(oauthEndpoint, new FormUrlEncodedContent(new[]
            {
                new KeyValuePair<string, string>("resource", resource),
                new KeyValuePair<string, string>("client_id", "your AAD App Id"),
                new KeyValuePair<string, string>("grant_type", "password"),
                new KeyValuePair<string, string>("username", "your.user@yourtenent.url"),
                new KeyValuePair<string, string>("password", "your password"),
                new KeyValuePair<string, string>("scope", "openid"),
                new KeyValuePair<string, string>("client_secret", "an access key for your AAD App"),
            }));

            var content = await result.Content.ReadAsStringAsync();
            var authResult = JsonConvert.DeserializeObject<OAuthResult>(content);
            return authResult;
        }
    }

    class OAuthResult
    {
        public string Token_Type { get; set; }
        public string Scope { get; set; }
        public int Expires_In { get; set; }
        public int Ext_Expires_In { get; set; }
        public int Expires_On { get; set; }
        public int Not_Before { get; set; }
        public Uri Resource { get; set; }
        public string Access_Token { get; set; }
    }

然后您可以像这样继续使用 Auth 结果：

    private async Task<HttpClient> GetHttpClientWithAzureADAuthentication()
    {
        OAuthResult authResult;
        try
        {
            authResult = await AuthenticateAsync();
            var httpClient = GetHttpClient();
            httpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {authResult.Access_Token}");

            return httpClient;
        }
        catch (Exception e)
        {
            Debug.WriteLine(e);
            throw;
        }
    }

Answer 2

如果您使用客户端应用程序进行开发，您可以参考以下代码获取令牌：

string authority = "https://login.microsoftonline.com/xxxx.onmicrosoft.com";
string resrouce = "https://graph.windows.net";
string clientId = "";
string userName = "";
string password = "";
UserPasswordCredential userPasswordCredential = new UserPasswordCredential(userName,password);
AuthenticationContext authContext = new AuthenticationContext(authority);
var token= authContext.AcquireTokenAsync(resrouce,clientId, userPasswordCredential).Result.AccessToken;

如果您使用 Web 应用程序进行开发（这不是常见的场景），ADAL V3 中没有这样的方法来支持这种场景。作为一种解决方法，您可以自己构建请求。以下是供您参考的示例：

POST: https://login.microsoftonline.com/xxxxx.onmicrosoft.com/oauth2/token

Content-Type: application/x-www-form-urlencoded
resource={resource}&client_id={clientId}&grant_type=password&username={userName}&password={password}&scope=openid&client_secret={clientSecret}