向 ADFS 进行身份验证时出现“验证邮件安全性时出错”异常

正如我在另一个问题中所描述的，我构建了一个 Web 服务，该服务将采用用户名/密码，并根据这些凭据对 ADFS2 中的用户(移动应用程序(进行身份验证。我的 Web 服务在 ADFS 上配置为 RP。ADFS 发行 SAML 2.0 令牌。

这是网络方法的代码：

public class MobileAuthService : IMobileAuthService
{
    private const string adfsBaseAddress = @"https://<my_adfs_hostname>/adfs/services/";
    private const string endpointSuffix = @"trust/13/issuedtokenmixedsymmetricbasic256";
    public string AuthenticateUser(string username, string password)
    {
        var binding = new WS2007HttpBinding(SecurityMode.Message);
        binding.Security.Message.EstablishSecurityContext = false;
        binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.None;
        binding.Security.Message.ClientCredentialType = MessageCredentialType.UserName;
        binding.Security.Mode = SecurityMode.TransportWithMessageCredential;
        var trustChannelFactory = new WSTrustChannelFactory(binding, new EndpointAddress(adfsBaseAddress + endpointSuffix))
                                        {
                                            TrustVersion = TrustVersion.WSTrust13
                                        };
        trustChannelFactory.Credentials.UserName.UserName = username;
        trustChannelFactory.Credentials.UserName.Password = password;
        var tokenClient = (WSTrustChannel)trustChannelFactory.CreateChannel();
        var rst = new RequestSecurityToken(RequestTypes.Issue, KeyTypes.Symmetric);
        var token = tokenClient.Issue(rst);
        // do some token-related stuff
        return token.Id;
    }
}

当我尝试运行它时(来自浏览器的 GET 调用，因为它为此端点配置了 Web http 绑定(，我得到以下异常：

System.ServiceModel.Security.MessageSecurityException - "An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail."

内部例外：

System.ServiceModel.FaultException - "An error occurred when verifying security for the message."

我想这与响应签名或证书有关，但我不知道如何克服这个问题，因为我对 WIF 很陌生。

public class MobileAuthService : IMobileAuthService
{
    private const string stsEndpointAddress = @"https://<my_adfs_hostname>/adfs/services/trust/13/usernamemixed";
    private const string relyingPartyAddress =
        "https://<my_service_addr>/Auth.svc";
    public string AuthenticateUser(string username, string password)
    {
        var binding = new UserNameWSTrustBinding(SecurityMode.TransportWithMessageCredential)
            {
                ClientCredentialType = HttpClientCredentialType.None
            };
        var trustChannelFactory = new WSTrustChannelFactory(binding, new EndpointAddress(stsEndpointAddress))
                                        {
                                            TrustVersion = TrustVersion.WSTrust13
                                        };
        var channelCredentials = trustChannelFactory.Credentials;
        channelCredentials.UserName.UserName = username;
        channelCredentials.UserName.Password = password;
        channelCredentials.SupportInteractive = false;
        var tokenClient = (WSTrustChannel)trustChannelFactory.CreateChannel();
        var rst = new RequestSecurityToken(RequestTypes.Issue, KeyTypes.Bearer)
            {
                AppliesTo = new EndpointReference(relyingPartyAddress),
                ReplyTo = relyingPartyAddress,
                TokenType = "http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLV2.0"
            };
        // to some token-related stuff (like transformations etc...)
    }
}