无法使用android客户端连接aws iot mqtt代理

当我要创建新的密钥和证书时,我无法连接AWS iot。

com.amazonaws.AmazonServiceException异常:用户: 美国焊接学会:sts::964546574005:假定角色/Cognito\u GTekPool3Unauth\u角色/CognitoIdentityCredentials

iot:上的CreateKeysAndCertificate资源:*(服务:AWSIot;状态) 代码:403;错误代码:AccessDeniedException;请求ID:

下面是我在代码中所做的工作:

if (clientKeyStore == null) {
            Log.i(LOG_TAG, "Cert/key was not found in keystore - creating new key and certificate.");

        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    // Create a new private key and certificate. This call
                    // creates both on the server and returns them to the
                    // device.
                    CreateKeysAndCertificateRequest createKeysAndCertificateRequest =
                            new CreateKeysAndCertificateRequest();
                    createKeysAndCertificateRequest.setSetAsActive(true);
                    final CreateKeysAndCertificateResult createKeysAndCertificateResult;
                    createKeysAndCertificateResult =
                            mIotAndroidClient.createKeysAndCertificate(createKeysAndCertificateRequest);
                    Log.i(LOG_TAG,
                            "Cert ID: " +
                                    createKeysAndCertificateResult.getCertificateId() +
                                    " created.");

                    // store in keystore for use in MQTT client
                    // saved as alias "default" so a new certificate isn't
                    // generated each run of this application
                    AWSIotKeystoreHelper.saveCertificateAndPrivateKey(certificateId,
                            createKeysAndCertificateResult.getCertificatePem(),
                            createKeysAndCertificateResult.getKeyPair().getPrivateKey(),
                            keystorePath, keystoreName, keystorePassword);

                    // load keystore from file into memory to pass on
                    // connection
                    clientKeyStore = AWSIotKeystoreHelper.getIotKeystore(certificateId,
                            keystorePath, keystoreName, keystorePassword);


                    // Attach a policy to the newly created certificate.
                    // This flow assumes the policy was already created in
                    // AWS IoT and we are now just attaching it to the
                    // certificate.
                    AttachPrincipalPolicyRequest policyAttachRequest =
                            new AttachPrincipalPolicyRequest();
                    policyAttachRequest.setPolicyName(AWS_IOT_POLICY_NAME);
                    policyAttachRequest.setPrincipal(createKeysAndCertificateResult
                            .getCertificateArn());
                    mIotAndroidClient.attachPrincipalPolicy(policyAttachRequest);

                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            btnConnect.setEnabled(true);
                        }
                    });
                } catch (Exception e) {
                    Log.e(LOG_TAG,
                            "Exception occurred when generating new private key and certificate.",
                            e);
                }
            }
        }).start();
    }
}

View.OnClickListener connectClick = new View.OnClickListener() {
    @Override
    public void onClick(View v) {

        Log.d(LOG_TAG, "clientId = " + clientId);

        try {
            mqttManager.connect(clientKeyStore, new AWSIotMqttClientStatusCallback() {
                @Override
                public void onStatusChanged(final AWSIotMqttClientStatus status,
                        final Throwable throwable) {
                    Log.d(LOG_TAG, "Status = " + String.valueOf(status));

                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            if (status == AWSIotMqttClientStatus.Connecting) {
                                tvStatus.setText("Connecting...");

                            } else if (status == AWSIotMqttClientStatus.Connected) {
                                tvStatus.setText("Connected");

                            } else if (status == AWSIotMqttClientStatus.Reconnecting) {
                                if (throwable != null) {
                                    Log.e(LOG_TAG, "Connection error.", throwable);
                                }
                                tvStatus.setText("Reconnecting");
                            } else if (status == AWSIotMqttClientStatus.ConnectionLost) {
                                if (throwable != null) {
                                    Log.e(LOG_TAG, "Connection error.", throwable);
                                }
                                tvStatus.setText("Disconnected");
                            } else {
                                tvStatus.setText("Disconnected");

                            }
                        }
                    });
                }
            });
        } catch (final Exception e) {
            Log.e(LOG_TAG, "Connection error.", e);
            tvStatus.setText("Error! " + e.getMessage());
        }
    }
};

密钥库中的证书未读取,并且给了我IOexception。