使用 SAML 的 Android Cognito (O365)

我正在尝试通过 Android 应用程序将 SAML 与 Amazon Cognito 集成。我关注了 101apps.co.za 的一系列 YouTube 视频，其中我成功地通过使用他们在文档中提供的链接格式的托管 UI 以及通过我的简单 Android 应用程序在 Cognito 控制台本身上对手动创建的用户进行了身份验证。

在我的场景中，我应该使用 Office 365 电子邮件 ID 和密码对用户进行身份验证，因为这是企业环境。 我确实按照一篇文章成功使用 Office 365 登录。 关联 -AWS Cognito 与 Office 365 联合 https://www.idea11.com.au/how-to-set-up-aws-cognito-federation-office365/我能够使用 Cognito 生成的 UI 轻松登录。参考下图

唯一的问题是我无法让它在我的 Android 应用程序上运行。下面是我得到的错误。

Login failed User does not exist. (Service: AmazonCognitoIdentityProvider; Status Code: 400; Error Code: UserNotFoundException; Request ID: 3cd1e93e-d118-11e8-af77-098f4bda99f1)

下面是我的简单 Android 应用程序的代码，该应用程序有 2 个用于用户名、密码的文本框和一个登录按钮。这是按照我之前提到的 YouTube 教程系列实现的。

package com.midassafety.chulankumara.googleauthentication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.amazonaws.mobileconnectors.cognitoidentityprovider.CognitoDevice;
import com.amazonaws.mobileconnectors.cognitoidentityprovider.CognitoUser;
import com.amazonaws.mobileconnectors.cognitoidentityprovider.CognitoUserSession;
import com.amazonaws.mobileconnectors.cognitoidentityprovider.continuations.AuthenticationContinuation;
import com.amazonaws.mobileconnectors.cognitoidentityprovider.continuations.AuthenticationDetails;
import com.amazonaws.mobileconnectors.cognitoidentityprovider.continuations.ChallengeContinuation;
import com.amazonaws.mobileconnectors.cognitoidentityprovider.continuations.MultiFactorAuthenticationContinuation;
import com.amazonaws.mobileconnectors.cognitoidentityprovider.handlers.AuthenticationHandler;

import org.w3c.dom.Text;

public class LoginActivity extends AppCompatActivity {

    private static final String TAG = "Cognito";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        final EditText editTextUsername = findViewById(R.id.username);
        final EditText editTextPassword = findViewById(R.id.password);

        final AuthenticationHandler authenticationHandler = new AuthenticationHandler() {
            @Override
            public void onSuccess(CognitoUserSession cognitoUserSession, CognitoDevice cognitoDevice) {
                Log.i(TAG, "Login successfull, can get tokens here");
                cognitoUserSession.getIdToken();
            }

            @Override
            public void getAuthenticationDetails(AuthenticationContinuation authenticationContinuation, String userId) {
                Log.i(TAG, "Login getAuthenticationDetails()...");

                /*need to get the userId & password to continue*/
                AuthenticationDetails authenticationDetails = new AuthenticationDetails(userId, String.valueOf(editTextPassword.getText()), null);

                // Pass the user sign-in credentials to the continuation
                authenticationContinuation.setAuthenticationDetails(authenticationDetails);

                // Allow this sign-in to continue
                authenticationContinuation.continueTask();
            }

            @Override
            public void getMFACode(MultiFactorAuthenticationContinuation multiFactorAuthenticationContinuation) {
                Log.i(TAG, "Login getMFACode()...");
            }

            @Override
            public void authenticationChallenge(ChallengeContinuation challengeContinuation) {
                Log.i(TAG, "Login authenticationChallenge()...");
            }

            @Override
            public void onFailure(Exception e) {
                Log.i(TAG,"Login failed " + e.getLocalizedMessage());
            }
        };

        Button buttonLogin = findViewById(R.id.login);
        buttonLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                CognitoSettings cognitoSettings = new CognitoSettings(LoginActivity.this);

                CognitoUser thisUser = cognitoSettings.getUserPool().getUser(String.valueOf(editTextUsername.getText()));

                Log.i(TAG,"Login button clicked....");

                thisUser.getSessionInBackground(authenticationHandler);
            }
        });
    }
}

这是处理基本设置的 CognitoSettings.java 类

package com.midassafety.chulankumara.googleauthentication;

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.amazonaws.mobileconnectors.cognitoidentityprovider.CognitoUserPool;
import com.amazonaws.regions.Regions;

public class CognitoSettings  {
    private String userPoolId = "ap-southeast-1_######";
    private String clientId = "#############";
    private String clientSecret = "************************redacted********************";
    private Regions cognitoRegion = Regions.AP_SOUTHEAST_1;

    private Context context;

    public CognitoSettings(Context context){
        this.context = context;
    }

    public String getUserPoolId(){
        return userPoolId;
    }

    public String getClientId(){
        return clientId;
    }

    public String getClientSecret() {
        return clientSecret;
    }

    public Regions getCognitoRegion() {
        return cognitoRegion;
    }

    public CognitoUserPool getUserPool(){
        return new CognitoUserPool(context, userPoolId, clientId, clientSecret, cognitoRegion);
    }
}

我检查 UserPool 并查看我创建的 SAML 身份提供商的自动生成组。

我已经在互联网上浏览了一整天，但没有运气。

我做错了什么或者我应该采取更多措施来使用 SAML 和 O365 对用户进行身份验证？