Java:未被授权执行sts: presumerolewithwebidentity认知用户池

Question

我使用AWS Cogito服务使用AWS Java SDK从Cognito获取用户凭据。

我跟着https://mobile.awsblog.com/post/TxBVEDL5Z8JKAC/Use-Amazon-Cognito-in-your-website-for-simple-AWS-authentication编写代码，使用cognito用户池对用户进行身份验证

在编写代码之前，我配置了cognito用户池，并使用以下池配置字段将其命名为demo。

Pool Id us-east-1_GUbY6qQ1v
Pool ARN arn:aws:cognito-idp:us-east-1:049428796662:userpool/us-east-1_GUbY6qQ1v

我使用了上面创建的身份池来满足联邦身份池的需求，如图所示。联邦身份用户池

现在回到代码，我编写了以下函数来检索用户标识并缓存它，以便如果相同的标识登录，则不会重复调用GetID()函数。

public UserIdentity getUserIdentity(User user) throws AuthorizationException {
if (user == null || user.getUsername() == null || user.getUsername().trim().equals("")) {
  throw new AuthorizationException("Invalid user");
}
AmazonCognitoIdentity identityClient = new AmazonCognitoIdentityClient(new AnonymousAWSCredentials());
GetIdRequest idRequest = new GetIdRequest();
idRequest.setAccountId(CognitoConfiguration.AWS_ACCOUNT_ID);
idRequest.setIdentityPoolId(CognitoConfiguration.IDENTITY_POOL_ID);
GetIdResult idResp = identityClient.getId(idRequest);
if (idResp == null) {
  throw new AuthorizationException("Empty GetOpenIdToken response");
}
GetOpenIdTokenRequest tokenRequest = new GetOpenIdTokenRequest();
tokenRequest.setIdentityId(idResp.getIdentityId());
GetOpenIdTokenResult tokenResp = identityClient.getOpenIdToken(tokenRequest);
UserIdentity identity = new UserIdentity();
identity.setIdentityId(idResp.getIdentityId());
identity.setOpenIdToken(tokenResp.getToken());
return identity;

}

用户类包含带有getOpenIdToken的字段标识，然后在向cognito请求凭据时检索此令牌。

public AWSSessionCredentials getUserCredentials(User user) throws AuthorizationException {
if (user == null || user.getCognitoIdentityId() == null || user.getCognitoIdentityId().trim().equals("")) {
  throw new AuthorizationException("Invalid user");
}
AWSSecurityTokenService stsClient = new AWSSecurityTokenServiceClient(new AnonymousAWSCredentials());
AssumeRoleWithWebIdentityRequest stsReq = new AssumeRoleWithWebIdentityRequest();
stsReq.setRoleArn(user.getUserRole());
System.out.println("The received get open id token is: " + user.getIdentity().getOpenIdToken());
stsReq.setWebIdentityToken(user.getIdentity().getOpenIdToken());
stsReq.setRoleSessionName("FassetTestSession");
AssumeRoleWithWebIdentityResult stsResp = stsClient.assumeRoleWithWebIdentity(stsReq);
Credentials stsCredentials = stsResp.getCredentials();
// Create the session credentials object
AWSSessionCredentials sessionCredentials = new BasicSessionCredentials(
    stsCredentials.getAccessKeyId(),
    stsCredentials.getSecretAccessKey(),
    stsCredentials.getSessionToken()
);
// save the timeout for these credentials 
Date sessionCredentialsExpiration = stsCredentials.getExpiration();
return sessionCredentials;

}

用户类的相关部分如下。

public class User {
  private UserIdentity identity;
  public String getCognitoIdentityId() {
    if (this.identity == null) {
      return null;
    }
    return this.identity.getIdentityId();
  }
  public void setCognitoIdentityId(String cognitoIdentityId) {
    if (this.identity == null) {
      this.identity = new UserIdentity();
    }
    this.identity.setIdentityId(cognitoIdentityId);
  }

}

这行假设olewithwebidentityresult stsResp = stsclient .假设olewithwebidentity (stsReq)，返回403 forbidden错误与下面的确切行。

    2016-10-13 17:47:02,330 DEBUG [wire(wire:72)] http-outgoing-4 << "<ErrorResponse xmlns="https://sts.amazonaws.com/doc/2011-06-15/">[n]"
2016-10-13 17:47:02,330 DEBUG [wire(wire:72)] http-outgoing-4 << "  <Error>[n]"
2016-10-13 17:47:02,330 DEBUG [wire(wire:72)] http-outgoing-4 << "    <Type>Sender</Type>[n]"
2016-10-13 17:47:02,330 DEBUG [wire(wire:72)] http-outgoing-4 << "    <Code>AccessDenied</Code>[n]"
2016-10-13 17:47:02,330 DEBUG [wire(wire:72)] http-outgoing-4 << "    <Message>Not authorized to perform sts:AssumeRoleWithWebIdentity</Message>[n]"
2016-10-13 17:47:02,330 DEBUG [wire(wire:72)] http-outgoing-4 << "  </Error>[n]"
2016-10-13 17:47:02,330 DEBUG [wire(wire:72)] http-outgoing-4 << "  <RequestId>fe4edd9f-913e-11e6-85cd-45155b40299e</RequestId>[n]"

用户角色的信任权限为:

   {
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Federated": "cognito-identity.amazonaws.com"
      },
      "Action": "sts:AssumeRoleWithWebIdentity",
      "Condition": {
        "StringEquals": {
          "cognito-identity.amazonaws.com:aud": "us-east-1:xxxxxxxxxxxxxxxx"
        },
        "ForAnyValue:StringLike": {
          "cognito-identity.amazonaws.com:amr": [
            "accounts.google.com",
            "graph.facebook.com",
            "authenticated"
          ]
        }
      }
    }
  ]
}

其中us-east-1:xxxxxxxxxxxxxxxx是管理社交用户池和认知用户池的用户身份池id。

我已经浏览了许多这样的博客，列出了信任权限和认知用户池，以了解上述问题，但徒劳无益，如果有人能帮助我解决上述问题，我将非常感激。

Answer 1

在调用GetId时，您没有在登录映射中传递用户池用户的id令牌。您需要在GetIdRequest上调用setlogin，其中包含cognito-idp.us-east-1.amazonaws.com/us-east-1_your_user_pool_id作为键，并将id令牌作为值

由于您没有传递此登录映射，因此您获得的身份是未经身份验证的身份，并且您的角色策略中只允许经过身份验证的用户。

参见:GetId API