pow
Class AES

java.lang.Object
  pow.AES

public class AES
extends java.lang.Object

implements AES encryption and decryption algorithms see @link http://java.sun.com/developer/technicalArticles/Security/AES/AES_v1.html see @link http://stackoverflow.com/questions/992019/java-256bit-aes-encryption

Constructor Summary

AES()
construct a cipher with a generated 128 bits key

AES(byte[] key, byte[] iv)
construct a cipher from a key and a parameter array usefull to create a remote decryption cypher

AES(java.lang.String password)
construct a cipher from an user specified key

Method Summary

byte[]	decrypt(byte[] msg) decrypt a byte array with AES algorithm see @link org.apache.commons.codec.binary.Hex to convert byte Array into hexString
byte[]	encrypt(byte[] msg) encrypt a byte array with AES algorithm
byte[]	getKey() get the cipher key
byte[]	getParamsEncrypt() get the init parameter of the cipher object in order to initialyse correctly a remote cipher

Methods inherited from class java.lang.Object

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

Constructor Detail

AES

public AES()
    throws java.security.NoSuchAlgorithmException,
           javax.crypto.NoSuchPaddingException,
           java.security.InvalidKeyException,
           java.security.spec.InvalidParameterSpecException,
           java.security.InvalidAlgorithmParameterException

construct a cipher with a generated 128 bits key

Throws:

java.security.spec.InvalidParameterSpecException

java.security.InvalidAlgorithmParameterException

java.security.NoSuchAlgorithmException

javax.crypto.NoSuchPaddingException

java.security.InvalidKeyException

AES

public AES(java.lang.String password)
    throws java.security.NoSuchAlgorithmException,
           javax.crypto.NoSuchPaddingException,
           java.security.InvalidKeyException,
           java.security.spec.InvalidParameterSpecException,
           java.security.InvalidAlgorithmParameterException,
           java.security.spec.InvalidKeySpecException

construct a cipher from an user specified key

Parameters:

password - a string representing the user key

Throws:

java.security.NoSuchAlgorithmException

javax.crypto.NoSuchPaddingException

java.security.InvalidKeyException

java.security.spec.InvalidParameterSpecException

java.security.InvalidAlgorithmParameterException

java.security.spec.InvalidKeySpecException

AES

public AES(byte[] key,
           byte[] iv)
    throws java.security.InvalidKeyException,
           java.security.InvalidAlgorithmParameterException,
           java.security.NoSuchAlgorithmException,
           javax.crypto.NoSuchPaddingException

construct a cipher from a key and a parameter array usefull to create a remote decryption cypher

Parameters:

key - the key in array byte format

iv - parameter of the cipher

Throws:

java.security.InvalidKeyException

java.security.InvalidAlgorithmParameterException

java.security.NoSuchAlgorithmException

javax.crypto.NoSuchPaddingException

Method Detail

getParamsEncrypt

public byte[] getParamsEncrypt()
                        throws java.security.spec.InvalidParameterSpecException

get the init parameter of the cipher object in order to initialyse correctly a remote cipher

Throws:

java.security.spec.InvalidParameterSpecException

getKey

public byte[] getKey()

get the cipher key

Returns:

the cipher key in byte array

encrypt

public byte[] encrypt(byte[] msg)
               throws java.io.IOException,
                      javax.crypto.IllegalBlockSizeException,
                      javax.crypto.BadPaddingException

encrypt a byte array with AES algorithm

Parameters:

msg -

Returns:

a byte array containing the ciphered data

Throws:

java.io.IOException

javax.crypto.BadPaddingException

javax.crypto.IllegalBlockSizeException

See Also:

to convert byte Array into hexString

decrypt

public byte[] decrypt(byte[] msg)
               throws java.io.IOException,
                      javax.crypto.IllegalBlockSizeException,
                      javax.crypto.BadPaddingException

decrypt a byte array with AES algorithm see @link org.apache.commons.codec.binary.Hex to convert byte Array into hexString

Parameters:

msg - the msg to decrypt

Returns:

the message decrypted

Throws:

java.io.IOException

javax.crypto.BadPaddingException

javax.crypto.IllegalBlockSizeException