# MacAttributes
<a name="API_MacAttributes"></a>

Parameters that are required for DUKPT, HMAC, or EMV MAC generation or verification.

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

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

 ** Algorithm **   <a name="paymentcryptographydata-Type-MacAttributes-Algorithm"></a>
The encryption algorithm for MAC generation or verification.  
Type: String  
Valid Values: `ISO9797_ALGORITHM1 | ISO9797_ALGORITHM3 | CMAC | HMAC | HMAC_SHA224 | HMAC_SHA256 | HMAC_SHA384 | HMAC_SHA512 | AS2805_4_1`   
Required: No

 ** DukptCmac **   <a name="paymentcryptographydata-Type-MacAttributes-DukptCmac"></a>
Parameters that are required for MAC generation or verification using DUKPT CMAC algorithm.  
Type: [MacAlgorithmDukpt](API_MacAlgorithmDukpt.md) object  
Required: No

 ** DukptIso9797Algorithm1 **   <a name="paymentcryptographydata-Type-MacAttributes-DukptIso9797Algorithm1"></a>
Parameters that are required for MAC generation or verification using DUKPT ISO 9797 algorithm1.  
Type: [MacAlgorithmDukpt](API_MacAlgorithmDukpt.md) object  
Required: No

 ** DukptIso9797Algorithm3 **   <a name="paymentcryptographydata-Type-MacAttributes-DukptIso9797Algorithm3"></a>
Parameters that are required for MAC generation or verification using DUKPT ISO 9797 algorithm3.  
Type: [MacAlgorithmDukpt](API_MacAlgorithmDukpt.md) object  
Required: No

 ** EmvMac **   <a name="paymentcryptographydata-Type-MacAttributes-EmvMac"></a>
Parameters that are required for MAC generation or verification using EMV MAC algorithm.  
Type: [MacAlgorithmEmv](API_MacAlgorithmEmv.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/payment-cryptography-data-2022-02-03/MacAttributes) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/payment-cryptography-data-2022-02-03/MacAttributes) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/payment-cryptography-data-2022-02-03/MacAttributes)