org.jboss.security.negotiation.cipher

Class AesCtsHmacSha1Decoder

java.lang.Object

org.jboss.security.negotiation.cipher.Decoder

org.jboss.security.negotiation.cipher.AesCtsHmacSha1Decoder

Direct Known Subclasses:

Aes128CtsHmacSha1Decoder, Aes256CtsHmacSha1Decoder

public abstract class AesCtsHmacSha1Decoder
extends Decoder

Common methods for the Aes*CtsHmacSha1 types.

Version:

$Revision: 1 $

Author:

Marcus Moyses

Constructor Summary

Constructors

Constructor and Description
AesCtsHmacSha1Decoder()

Method Summary

Methods

Modifier and Type	Method and Description
int	blockSize()
int	checksumSize()
int	confounderSize()
byte[]	decrypt(byte[] cipher, byte[] key, byte[] ivec, int usage)
byte[]	decrypt(byte[] cipher, byte[] key, int usage)
protected byte[]	decrypt(byte[] baseKey, int usage, byte[] ivec, byte[] cipherText, int start, int length)
protected byte[]	decryptCTS(byte[] baseKey, int usage, byte[] ivec, byte[] ciphertext, int start, int len, boolean confounder_exists)
byte[]	decryptedData(byte[] data)
protected byte[]	dk(byte[] key, byte[] constant)
protected Cipher	getCipher(byte[] key, byte[] ivec, int mode)
protected byte[]	getHmac(byte[] key, byte[] msg)
protected abstract int	getKeySeedLength()
protected byte[]	randomToKey(byte[] in)

Methods inherited from class org.jboss.security.negotiation.cipher.Decoder

dataSize, getInstace, keySize, startOfChecksum, startOfData

Methods inherited from class java.lang.Object

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

Constructor Detail

AesCtsHmacSha1Decoder

public AesCtsHmacSha1Decoder()

Method Detail

blockSize

public int blockSize()

Specified by:

blockSize in class Decoder

checksumSize

public int checksumSize()

Specified by:

checksumSize in class Decoder

confounderSize

public int confounderSize()

Specified by:

confounderSize in class Decoder

decrypt

public byte[] decrypt(byte[] cipher,
             byte[] key,
             int usage)
               throws NegotiationException

Specified by:

decrypt in class Decoder

Throws:

NegotiationException

decrypt

public byte[] decrypt(byte[] cipher,
             byte[] key,
             byte[] ivec,
             int usage)
               throws NegotiationException

Throws:

NegotiationException

decrypt

protected byte[] decrypt(byte[] baseKey,
             int usage,
             byte[] ivec,
             byte[] cipherText,
             int start,
             int length)
                  throws GeneralSecurityException

Throws:

GeneralSecurityException

decryptCTS

protected byte[] decryptCTS(byte[] baseKey,
                int usage,
                byte[] ivec,
                byte[] ciphertext,
                int start,
                int len,
                boolean confounder_exists)
                     throws GeneralSecurityException

Throws:

GeneralSecurityException

getHmac

protected byte[] getHmac(byte[] key,
             byte[] msg)
                  throws GeneralSecurityException

Throws:

GeneralSecurityException

dk

protected byte[] dk(byte[] key,
        byte[] constant)
             throws GeneralSecurityException

Throws:

GeneralSecurityException

randomToKey

protected byte[] randomToKey(byte[] in)

getCipher

protected Cipher getCipher(byte[] key,
               byte[] ivec,
               int mode)
                    throws GeneralSecurityException

Throws:

GeneralSecurityException

decryptedData

public byte[] decryptedData(byte[] data)

Overrides:

decryptedData in class Decoder

getKeySeedLength

protected abstract int getKeySeedLength()