# ClientCertificateConfig
<a name="API_ClientCertificateConfig"></a>

An object that specifies the client certificate configuration for a domain.

## Contents
<a name="API_ClientCertificateConfig_Contents"></a>

 ** clientCertificateCallbackArn **   <a name="iot-Type-ClientCertificateConfig-clientCertificateCallbackArn"></a>
The ARN of the Lambda function that AWS IoT invokes after mutual TLS authentication during the connection.  
Type: String  
Length Constraints: Maximum length of 2048.  
Pattern: `[\s\S]*`   
Required: No

## See Also
<a name="API_ClientCertificateConfig_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/iot-2015-05-28/ClientCertificateConfig) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iot-2015-05-28/ClientCertificateConfig) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iot-2015-05-28/ClientCertificateConfig)