org.bouncycastle.crypto.tls

Class TlsMac

public class TlsMac extends Object

A generic TLS MAC implementation, which can be used with any kind of Digest to act as an HMAC.
Constructor Summary
protected TlsMac(Digest digest, byte[] key_block, int offset, int len)
Generate a new instance of an TlsMac.
Method Summary
protected byte[]calculateMac(short type, byte[] message, int offset, int len)
Calculate the mac for some given data.
protected intgetSize()

Constructor Detail

TlsMac

protected TlsMac(Digest digest, byte[] key_block, int offset, int len)
Generate a new instance of an TlsMac.

Parameters: digest The digest to use. key_block A byte-array where the key for this mac is located. offset The number of bytes to skip, before the key starts in the buffer. len The length of the key.

Method Detail

calculateMac

protected byte[] calculateMac(short type, byte[] message, int offset, int len)
Calculate the mac for some given data.

TlsMac will keep track of the sequence number internally.

Parameters: type The message type of the message. message A byte-buffer containing the message. offset The number of bytes to skip, before the message starts. len The length of the message.

Returns: A new byte-buffer containing the mac value.

getSize

protected int getSize()

Returns: The Keysize of the mac.