public void setMac(java.nio.ByteBuffer mac) {
        this.mac = mac;
    }
<p>
The HMAC to verify. Enter the HMAC that was generated by the <a>GenerateMac</a> operation when you specified the
same message, HMAC KMS key, and MAC algorithm as the values specified in this request.
</p>
<p>
The AWS SDK for Java performs a Base64 encoding on this field before sending this request to the AWS service.
Users of the SDK should not perform Base64 encoding on this field.
</p>
<p>
Warning: ByteBuffers returned by the SDK are mutable. Changes to the content or position of the byte buffer will
be seen by all objects that have a reference to this object. It is recommended to call ByteBuffer.duplicate() or
ByteBuffer.asReadOnlyBuffer() before using or reading from the buffer. This behavior will be changed in a future
major version of the SDK.
</p>

@param mac
       The HMAC to verify. Enter the HMAC that was generated by the <a>GenerateMac</a> operation when you
       specified the same message, HMAC KMS key, and MAC algorithm as the values specified in this request.
aws-java-sdk-kms/src/main/java/com/amazonaws/services/kms/model/VerifyMacRequest.java