c# - AuthenticationContext.AcquireTokenAsync

Question

我希望能够以编程方式从 Azure 获取 token 。

我调用 GetAToken().Wait(); 但失败了。

方法是:

public async Task<string> GetAToken()
{
    // authentication parameters
    string clientID = "*********";
    string username = "<azure login>";
    string password = "<azure login password>";
    string directoryName = "<AD Domain name>";

    ClientCredential cc = new ClientCredential(clientID, password);
    var authenticationContext = new AuthenticationContext(
           "https://login.windows.net/" + directoryName);

    AuthenticationResult result = await authenticationContext.AcquireTokenAsync(
           "https://management.core.windows.net/", cc);

    if (result == null)
    {
        throw new InvalidOperationException("Failed to obtain the JWT token");
    }

    string token = result.AccessToken;

    return token;
}

Answer 1

所以不确定您是在 Android、iOS 还是 Xamarin.Forms 上执行此操作。以下是我将如何使用 ADAL 和 Azure 进行身份验证(代码在我这边运行):

在 Android 上:

public async Task<AuthenticationResult> Authenticate(Activity context, string authority, string resource, string clientId, string returnUri)
{
    var authContext = new AuthenticationContext(authority);
    if (authContext.TokenCache.ReadItems().Any())
        authContext = new AuthenticationContext(authContext.TokenCache.ReadItems().First().Authority);

    var uri = new Uri(returnUri);
    var platformParams = new PlatformParameters(context);
    try
    {
        var authResult = await authContext.AcquireTokenAsync(resource, clientId, uri, platformParams);
        return authResult;
    }
    catch (AdalException e)
    {
        return null;
    }
}

在 iOS 上:

public async Task<AuthenticationResult> Authenticate(UIViewController controller, string authority, string resource, string clientId, string returnUri)
    {
        var authContext = new AuthenticationContext(authority);
        if (authContext.TokenCache.ReadItems().Any())
            authContext = new AuthenticationContext(authContext.TokenCache.ReadItems().First().Authority);

        var controller = UIApplication.SharedApplication.KeyWindow.RootViewController;
        var uri = new Uri(returnUri);
        var platformParams = new PlatformParameters(controller);

        try
        {
            var authResult = await authContext.AcquireTokenAsync(resource, clientId, uri, platformParams);
            return authResult;
        }
        catch (AdalException e)
        {
            return null;
        }
    }

关于UWP :

public async Task<AuthenticationResult> Authenticate(string authority, string resource, string clientId, string returnUri)
{
    var authContext = new AuthenticationContext(authority);
    if (authContext.TokenCache.ReadItems().Any())
        authContext = new AuthenticationContext(authContext.TokenCache.ReadItems().First().Authority);

    var uri = new Uri(returnUri);
    var platformParams = new PlatformParameters(PromptBehavior.Auto);
    try
    {
        var authResult = await authContext.AcquireTokenAsync(resource, clientId, uri, platformParams);
        return authResult;
    }
    catch (AdalException e)
    {
        return null;
    }
}

我传递给上述方法的变量:

string authority = "https://login.windows.net/common";
string ResourceID = "Backend ClientId";//Backend (web app)
string clientId = "Native App ClientId";//native app
string returnUri = "https://{My Azure Site}.azurewebsites.net/.auth/login/done";

如果您想在 Xamarin.Forms 中执行此操作，下面是我的 GitHub 解决方案的链接，我在其中通过 DependencyService 公开了这些方法。

• PCL implementation
• iOS implementation
• Android Implementation

我希望这有帮助!如果您的响应中出现任何错误，请检查以确保您在 Azure 中正确设置了权限。我这样做就像 this 。另一个很棒的资源是Adrian Hall's Xamarin/Azure book

编辑:添加了 UWP 内容