com.google.crypto.tink.subtle

Class AesCmac

java.lang.Object

com.google.crypto.tink.subtle.AesCmac

All Implemented Interfaces:

Mac

public final class AesCmac
extends Object
implements Mac

An implementation of CMAC following RFC 4493.

Constructor Summary

Constructors

Constructor and Description
AesCmac(byte[] key, int tagSizeInBytes)

Method Summary

Modifier and Type	Method and Description
byte[]	computeMac(byte[] data) Computes message authentication code (MAC) for data.
void	verifyMac(byte[] mac, byte[] data) Verifies whether mac is a correct authentication code (MAC) for data.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AesCmac

public AesCmac(byte[] key,
               int tagSizeInBytes)
        throws GeneralSecurityException

Throws:

GeneralSecurityException

Method Detail

computeMac

public byte[] computeMac(byte[] data)
                  throws GeneralSecurityException

Description copied from interface: Mac

Computes message authentication code (MAC) for data.

Specified by:

computeMac in interface Mac

Returns:

MAC value

Throws:

GeneralSecurityException

verifyMac

public void verifyMac(byte[] mac,
                      byte[] data)
               throws GeneralSecurityException

Description copied from interface: Mac

Verifies whether mac is a correct authentication code (MAC) for data.

Specified by:

verifyMac in interface Mac

Throws:

GeneralSecurityException - if mac is not a correct MAC for data