Request Syntax Request Parameters Response Syntax Response Elements Errors See Also

AdminRespondToAuthChallenge

Responds to an authentication challenge, as an administrator.

Note

This action might generate an SMS text message. Starting June 1, 2021, US telecom carriers require you to register an origination phone number before you can send SMS messages to US phone numbers. If you use SMS text messages in Amazon Cognito, you must register a phone number with Amazon Pinpoint. Amazon Cognito uses the registered number automatically. Otherwise, Amazon Cognito users who must receive SMS messages might not be able to sign up, activate their accounts, or sign in.

If you have never used SMS text messages with Amazon Cognito or any other AWS service, Amazon Simple Notification Service might place your account in the SMS sandbox. In sandbox mode , you can send messages only to verified phone numbers. After you test your app while in the sandbox environment, you can move out of the sandbox and into production. For more information, see SMS message settings for Amazon Cognito user pools in the Amazon Cognito Developer Guide.

Calling this action requires developer credentials.

Request Syntax


{
   "AnalyticsMetadata": { 
      "AnalyticsEndpointId": "string"
   },
   "ChallengeName": "string",
   "ChallengeResponses": { 
      "string" : "string" 
   },
   "ClientId": "string",
   "ClientMetadata": { 
      "string" : "string" 
   },
   "ContextData": { 
      "EncodedData": "string",
      "HttpHeaders": [ 
         { 
            "headerName": "string",
            "headerValue": "string"
         }
      ],
      "IpAddress": "string",
      "ServerName": "string",
      "ServerPath": "string"
   },
   "Session": "string",
   "UserPoolId": "string"
}

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.

AnalyticsMetadata

The analytics metadata for collecting Amazon Pinpoint metrics for AdminRespondToAuthChallenge calls.

Type: AnalyticsMetadataType object

Required: No

ChallengeName

The challenge name. For more information, see AdminInitiateAuth.

Type: String

Required: Yes

ChallengeResponses

The challenge responses. These are inputs corresponding to the value of ChallengeName, for example:

SMS_MFA: SMS_MFA_CODE, USERNAME, SECRET_HASH (if app client is configured with client secret).
PASSWORD_VERIFIER: PASSWORD_CLAIM_SIGNATURE, PASSWORD_CLAIM_SECRET_BLOCK, TIMESTAMP, USERNAME, SECRET_HASH (if app client is configured with client secret).

Note
PASSWORD_VERIFIER requires DEVICE_KEY when signing in with a remembered device.
ADMIN_NO_SRP_AUTH: PASSWORD, USERNAME, SECRET_HASH (if app client is configured with client secret).
NEW_PASSWORD_REQUIRED: NEW_PASSWORD, USERNAME, SECRET_HASH (if app client is configured with client secret). To set any required attributes that Amazon Cognito returned as requiredAttributes in the AdminInitiateAuth response, add a userAttributes.attributename parameter. This parameter can also set values for writable attributes that aren't required by your user pool.

Note
In a NEW_PASSWORD_REQUIRED challenge response, you can't modify a required attribute that already has a value. In AdminRespondToAuthChallenge, set a value for any keys that Amazon Cognito returned in the requiredAttributes parameter, then use the AdminUpdateUserAttributes API operation to modify the value of any additional attributes.
MFA_SETUP requires USERNAME, plus you must use the session value returned by VerifySoftwareToken in the Session parameter.

The value of the USERNAME attribute must be the user's actual username, not an alias (such as an email address or phone number). To make this simpler, the AdminInitiateAuth response includes the actual username value in the USERNAMEUSER_ID_FOR_SRP attribute. This happens even if you specified an alias in your call to AdminInitiateAuth.

Type: String to string map

Required: No

ClientId

The app client ID.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: [\w+]+

Required: Yes

ClientMetadata

A map of custom key-value pairs that you can provide as input for any custom workflows that this action triggers.

You create custom workflows by assigning AWS Lambda functions to user pool triggers. When you use the AdminRespondToAuthChallenge API action, Amazon Cognito invokes any functions that you have assigned to the following triggers:

pre sign-up
custom message
post authentication
user migration
pre token generation
define auth challenge
create auth challenge
verify auth challenge response

When Amazon Cognito invokes any of these functions, it passes a JSON payload, which the function receives as input. This payload contains a clientMetadata attribute that provides the data that you assigned to the ClientMetadata parameter in your AdminRespondToAuthChallenge request. In your function code in AWS Lambda, you can process the clientMetadata value to enhance your workflow for your specific needs.

For more information, see Customizing user pool Workflows with Lambda Triggers in the Amazon Cognito Developer Guide.

Note

When you use the ClientMetadata parameter, remember that Amazon Cognito won't do the following:

Store the ClientMetadata value. This data is available only to AWS Lambda triggers that are assigned to a user pool to support custom workflows. If your user pool configuration doesn't include triggers, the ClientMetadata parameter serves no purpose.
Validate the ClientMetadata value.
Encrypt the ClientMetadata value. Don't use Amazon Cognito to provide sensitive information.

Type: String to string map

Required: No

ContextData

Contextual data about your user session, such as the device fingerprint, IP address, or location. Amazon Cognito advanced security evaluates the risk of an authentication event based on the context that your app generates and passes to Amazon Cognito when it makes API requests.

Type: ContextDataType object

Required: No

Session

The session that should be passed both ways in challenge-response calls to the service. If an InitiateAuth or RespondToAuthChallenge API call determines that the caller must pass another challenge, it returns a session with other challenge parameters. This session should be passed as it is to the next RespondToAuthChallenge API call.

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Required: No

UserPoolId

The ID of the Amazon Cognito user pool.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 55.

Pattern: [\w-]+_[0-9a-zA-Z]+

Required: Yes

Response Syntax


{
   "AuthenticationResult": { 
      "AccessToken": "string",
      "ExpiresIn": number,
      "IdToken": "string",
      "NewDeviceMetadata": { 
         "DeviceGroupKey": "string",
         "DeviceKey": "string"
      },
      "RefreshToken": "string",
      "TokenType": "string"
   },
   "ChallengeName": "string",
   "ChallengeParameters": { 
      "string" : "string" 
   },
   "Session": "string"
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

AuthenticationResult

The result returned by the server in response to the authentication request.

Type: AuthenticationResultType object

ChallengeName

The name of the challenge. For more information, see AdminInitiateAuth.

Type: String

ChallengeParameters

The challenge parameters. For more information, see AdminInitiateAuth.

Type: String to string map

Session

The session that should be passed both ways in challenge-response calls to the service. If the caller must pass another challenge, they return a session with other challenge parameters. This session should be passed as it is to the next RespondToAuthChallenge API call.

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Errors

For information about the errors that are common to all actions, see Common Errors.

AliasExistsException

This exception is thrown when a user tries to confirm the account with an email address or phone number that has already been supplied as an alias for a different user profile. This exception indicates that an account with this email address or phone already exists in a user pool that you've configured to use email address or phone number as a sign-in alias.

HTTP Status Code: 400

CodeMismatchException

This exception is thrown if the provided code doesn't match what the server was expecting.

HTTP Status Code: 400

ExpiredCodeException

This exception is thrown if a code has expired.

HTTP Status Code: 400

InternalErrorException

This exception is thrown when Amazon Cognito encounters an internal error.

HTTP Status Code: 500

InvalidLambdaResponseException

This exception is thrown when Amazon Cognito encounters an invalid AWS Lambda response.

HTTP Status Code: 400

InvalidParameterException

This exception is thrown when the Amazon Cognito service encounters an invalid parameter.

HTTP Status Code: 400

InvalidPasswordException

This exception is thrown when Amazon Cognito encounters an invalid password.

HTTP Status Code: 400

InvalidSmsRoleAccessPolicyException

This exception is returned when the role provided for SMS configuration doesn't have permission to publish using Amazon SNS.

HTTP Status Code: 400

InvalidSmsRoleTrustRelationshipException

This exception is thrown when the trust relationship is not valid for the role provided for SMS configuration. This can happen if you don't trust cognito-idp.amazonaws.com or the external ID provided in the role does not match what is provided in the SMS configuration for the user pool.

HTTP Status Code: 400

InvalidUserPoolConfigurationException

This exception is thrown when the user pool configuration is not valid.

HTTP Status Code: 400

MFAMethodNotFoundException

This exception is thrown when Amazon Cognito can't find a multi-factor authentication (MFA) method.

HTTP Status Code: 400

NotAuthorizedException

This exception is thrown when a user isn't authorized.

HTTP Status Code: 400

PasswordResetRequiredException

This exception is thrown when a password reset is required.

HTTP Status Code: 400

ResourceNotFoundException

This exception is thrown when the Amazon Cognito service can't find the requested resource.

HTTP Status Code: 400

SoftwareTokenMFANotFoundException

This exception is thrown when the software token time-based one-time password (TOTP) multi-factor authentication (MFA) isn't activated for the user pool.

HTTP Status Code: 400

TooManyRequestsException

This exception is thrown when the user has made too many requests for a given operation.

HTTP Status Code: 400

UnexpectedLambdaException

This exception is thrown when Amazon Cognito encounters an unexpected exception with AWS Lambda.

HTTP Status Code: 400

UserLambdaValidationException

This exception is thrown when the Amazon Cognito service encounters a user validation exception with the AWS Lambda service.

HTTP Status Code: 400

UserNotConfirmedException

This exception is thrown when a user isn't confirmed successfully.

HTTP Status Code: 400

UserNotFoundException

This exception is thrown when a user isn't found.

HTTP Status Code: 400