com.google.crypto.tink

Interface Mac

All Known Implementing Classes:

PrfMac

public interface Mac

Interface for Message Authentication Codes (MAC).

Security guarantees

Message Authentication Codes provide symmetric message authentication. Instances implementing this interface are secure against existential forgery under chosen plaintext attack, and can be deterministic or randomized. This interface should be used for authentication only, and not for other purposes like generation of pseudorandom bytes.

Since:

1.0.0

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.

Method Detail

computeMac

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

Computes message authentication code (MAC) for data.

Returns:

MAC value

Throws:

GeneralSecurityException

verifyMac

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

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

Throws:

GeneralSecurityException - if mac is not a correct MAC for data