old.org.bouncycastle.crypto.tls

Class TlsBlockCipher

java.lang.Object

old.org.bouncycastle.crypto.tls.TlsBlockCipher

All Implemented Interfaces:

TlsCipher

public class TlsBlockCipher
extends Object
implements TlsCipher

A generic TLS 1.0 block cipher. This can be used for AES or 3DES for example.

Field Summary

Fields

Modifier and Type	Field and Description
protected TlsClientContext	context
protected BlockCipher	decryptCipher
protected BlockCipher	encryptCipher
protected TlsMac	readMac
protected TlsMac	writeMac

Constructor Summary

Constructors

Constructor and Description
TlsBlockCipher(TlsClientContext context, BlockCipher encryptCipher, BlockCipher decryptCipher, Digest writeDigest, Digest readDigest, int cipherKeySize)

Method Summary

Modifier and Type	Method and Description
byte[]	decodeCiphertext(short type, byte[] ciphertext, int offset, int len)
byte[]	encodePlaintext(short type, byte[] plaintext, int offset, int len)
protected int	chooseExtraPadBlocks(SecureRandom r, int max)
protected void	initCipher(boolean forEncryption, BlockCipher cipher, byte[] key_block, int key_size, int key_offset, int iv_offset)
protected int	lowestBitSet(int x)

Methods inherited from class java.lang.Object

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

Field Detail

context

protected TlsClientContext context

encryptCipher

protected BlockCipher encryptCipher

decryptCipher

protected BlockCipher decryptCipher

writeMac

protected TlsMac writeMac

readMac

protected TlsMac readMac

Constructor Detail

TlsBlockCipher

public TlsBlockCipher(TlsClientContext context,
                      BlockCipher encryptCipher,
                      BlockCipher decryptCipher,
                      Digest writeDigest,
                      Digest readDigest,
                      int cipherKeySize)

Method Detail

initCipher

protected void initCipher(boolean forEncryption,
                          BlockCipher cipher,
                          byte[] key_block,
                          int key_size,
                          int key_offset,
                          int iv_offset)

encodePlaintext

public byte[] encodePlaintext(short type,
                              byte[] plaintext,
                              int offset,
                              int len)

Specified by:

encodePlaintext in interface TlsCipher

decodeCiphertext

public byte[] decodeCiphertext(short type,
                               byte[] ciphertext,
                               int offset,
                               int len)
                        throws IOException

Specified by:

decodeCiphertext in interface TlsCipher

Throws:

IOException

chooseExtraPadBlocks

protected int chooseExtraPadBlocks(SecureRandom r,
                                   int max)

lowestBitSet

protected int lowestBitSet(int x)