# VirtualGatewayTlsValidationContextTrust
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An object that represents a Transport Layer Security (TLS) validation context trust.

## Contents
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**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** acm **   <a name="appmesh-Type-VirtualGatewayTlsValidationContextTrust-acm"></a>
A reference to an object that represents a Transport Layer Security (TLS) validation context trust for an AWS Certificate Manager certificate.  
Type: [VirtualGatewayTlsValidationContextAcmTrust](API_VirtualGatewayTlsValidationContextAcmTrust.md) object  
Required: No

 ** file **   <a name="appmesh-Type-VirtualGatewayTlsValidationContextTrust-file"></a>
An object that represents a Transport Layer Security (TLS) validation context trust for a local file.  
Type: [VirtualGatewayTlsValidationContextFileTrust](API_VirtualGatewayTlsValidationContextFileTrust.md) object  
Required: No

 ** sds **   <a name="appmesh-Type-VirtualGatewayTlsValidationContextTrust-sds"></a>
A reference to an object that represents a virtual gateway's Transport Layer Security (TLS) Secret Discovery Service validation context trust.  
Type: [VirtualGatewayTlsValidationContextSdsTrust](API_VirtualGatewayTlsValidationContextSdsTrust.md) object  
Required: No

## See Also
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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/appmesh-2019-01-25/VirtualGatewayTlsValidationContextTrust) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/appmesh-2019-01-25/VirtualGatewayTlsValidationContextTrust) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/appmesh-2019-01-25/VirtualGatewayTlsValidationContextTrust)