Package com.google.crypto.tink.aead.internal

Class Poly1305

java.lang.Object

com.google.crypto.tink.aead.internal.Poly1305

public class Poly1305
extends java.lang.Object

Poly1305 one-time MAC based on RFC 7539.

This is not an implementation of the MAC interface on purpose and it is not equivalent to HMAC.

The implementation is based on poly1305 implementation by Andrew Moon (https://github.com/floodyberry/poly1305-donna) and released as public domain.

Field Summary

Fields

Modifier and Type	Field	Description
static int	MAC_KEY_SIZE_IN_BYTES
static int	MAC_TAG_SIZE_IN_BYTES

Method Summary

Modifier and Type	Method	Description
static byte[]	computeMac(byte[] key, byte[] data)	Computes Poly1305 MAC over data using key.
static void	verifyMac(byte[] key, byte[] data, byte[] mac)	Verifies Poly1305 {@ mac} over data using key.

Methods inherited from class java.lang.Object

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

Field Detail

MAC_TAG_SIZE_IN_BYTES

public static final int MAC_TAG_SIZE_IN_BYTES

See Also:

Constant Field Values

MAC_KEY_SIZE_IN_BYTES

public static final int MAC_KEY_SIZE_IN_BYTES

See Also:

Constant Field Values

Method Detail

computeMac

public static byte[] computeMac(byte[] key,
                                byte[] data)

Computes Poly1305 MAC over data using key.

verifyMac

public static void verifyMac(byte[] key,
                             byte[] data,
                             byte[] mac)
                      throws java.security.GeneralSecurityException

Verifies Poly1305 {@ mac} over data using key.

Throws:

java.security.GeneralSecurityException