問題描述

我正在嘗試使用 .NET ADAL 庫驗證 Azure AD 中的用戶密碼.這適用于沒有 MFA 的普通用戶帳戶，但我遇到了為已激活 MFA 的用戶執行此操作的問題.

I'm trying to verify a user's password in Azure AD using the .NET ADAL library. This works fine for a regular user account without MFA, but I ran into problems doing this for a user who has MFA activated.

當使用用戶的實際密碼時，我得到了 AADSTS50076: Application password is required.，這很公平，但是當我創建一個新的應用程序密碼時，我收到了錯誤 AADSTS70002: 驗證憑據時出錯.AADSTS50020:用戶名或密碼無效.我已經創建了多個應用密碼，但它們都不起作用.

When using the user's actual password, I got AADSTS50076: Application password is required., which is fair enough, but when I then created a new app password, I received the error AADSTS70002: Error validating credentials. AADSTS50020: Invalid username or password. I've created multiple app passwords but they all do not work.

用于嘗試驗證的代碼如下:

The code used to attempt authentication is as follows:

var ac = new AuthenticationContext("https://login.windows.net/my-tenant.com");
var authResult = ac.AcquireToken("https://graph.windows.net", "my-client-id", new UserCredential("my.account@my-tenant.com", "my-password"));

嘗試進行身份驗證的用戶是此 AD 中的全局管理員.

The user that is trying to authenticate is a Global Admin in this AD.

是否甚至可以為具有 MFA 的用戶進行這樣的身份驗證?

Is it even possible to do authentication like this for a user with MFA?

推薦答案

所以，為了回答我自己的問題，我采取了以下措施(為簡潔起見):

So, to answer my own question somewhat, I resorted to doing the following (cleaned up for brevity):

public class AzureAdAuthenticationProvider
{
    private const string AppPasswordRequiredErrorCode = "50076";
    private const string AuthorityFormatString = "https://login.windows.net/{0}";
    private const string GraphResource = "https://graph.windows.net";

    private AuthenticationContext _authContext;
    private string _clientId;

    public AzureAdAuthenticationProvider()
    {
        var tenantId = "..."; // Get from configuration

        _authContext = new AuthenticationContext(string.Format(AuthorityFormatString, tenantId));
    }

    public bool Authenticate(string user, string pass)
    {
        try
        {
            _authContext.AcquireToken(GraphResource, _clientId, new UserCredential(user, pass));

            return true;
        }
        catch (AdalServiceException ase)
        {
            return ase.ServiceErrorCodes.All(sec => sec == AppPasswordRequiredErrorCode);
        }
        catch (Exception)
        {
            return false; // Probably needs proper handling
        }
    }
}

它不漂亮，但它可以完成工作.

It's not pretty, but it does the job.

通過使用ServiceErrorCodes.All()，我保證只有當一個AppPasswordRequired錯誤發生時，認證成功.

By using ServiceErrorCodes.All(), I ensure that only when a single AppPasswordRequired error occurs, authentication has succeeded.

此方法的唯一缺點是啟用 MFA 的用戶必須使用其實際帳戶密碼才能登錄.似乎不支持使用應用密碼.

The only disadvantage to this method, is that a user with MFA enabled has to use their actual account password to login. Using an app password does not seem to be supported.

這篇關于Azure AD AcquireToken 不適用于應用密碼的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！