com.uc4.util

Class AES

java.lang.Object

com.uc4.util.AES

public final class AES
extends java.lang.Object

Rijndael.java

Version:

1.0 (May 2001) Optimised Java implementation of the Rijndael (AES) block cipher.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AES.Mode encryption operating modes

Constructor Summary

Constructors

Constructor and Description
AES()

Method Summary

Modifier and Type	Method and Description
void	CMNDecrypt(byte[] buf, int start, int len, byte[] IV) used to decrypt a byte buffer.
void	CMNEncrypt(byte[] buf, int start, int len, byte[] IV) used to encrypt a byte buffer.
void	encFree() used to free allocated resources.
protected void	finalize() Destroy all sensitive information in this object.
void	initializeEnc(byte[] Key, int KeyLen, AES.Mode m) initialize the encryption class.

Methods inherited from class java.lang.Object

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

Constructor Detail

AES

public AES()

Method Detail

initializeEnc

public void initializeEnc(byte[] Key,
                          int KeyLen,
                          AES.Mode m)

initialize the encryption class. to encrypt use CMNEncrypt to decrypt use CMNDecrypt

Parameters:

Key - the key to be used

KeyLen - the active key length

m - the operation mode CBC - ECB

CMNEncrypt

public void CMNEncrypt(byte[] buf,
                       int start,
                       int len,
                       byte[] IV)

used to encrypt a byte buffer. use InitializeEnc to initialize the class.

Parameters:

buf - the byte buffer to be encrypted

start - the encryption start position in the byte buffer

len - the length to be encrypted

IV - the initial vector to be used

CMNDecrypt

public void CMNDecrypt(byte[] buf,
                       int start,
                       int len,
                       byte[] IV)

used to decrypt a byte buffer. use InitializeEnc to initialize the class.

Parameters:

buf - the byte buffer to be decrypted

start - the decryption start position in the byte buffer

len - the length to be decrypted

IV - the initial vector to be used

encFree

public void encFree()

used to free allocated resources. and sensitive data will be wiped out

finalize

protected final void finalize()

Destroy all sensitive information in this object.

Overrides:

finalize in class java.lang.Object