com.googlecode.jinahya.nica.util

Class Aes

java.lang.Object

com.googlecode.jinahya.nica.util.Aes

Direct Known Subclasses:

AesBC, AesJCE

public abstract class Aes
extends Object

An abstract class for AES encryption/decryption.

Author:

Jin Kwon

Field Summary

Fields

Modifier and Type	Field and Description
static int	BLOCK_SIZE AES block size in bits.
static int	BLOCK_SIZE_IN_BYTES AES block size in bytes.
static int	KEY_SIZE Key size in bits.
static int	KEY_SIZE_IN_BYTES Key size in bytes.

Constructor Summary

Constructors

Constructor and Description
Aes()

Method Summary

Methods

Modifier and Type	Method and Description
abstract byte[]	decrypt(byte[] iv, byte[] encrypted) Decrypts given encrypted.
abstract byte[]	encrypt(byte[] iv, byte[] decrypted) Encrypts given decrypted.
static byte[]	newIv() Generates a new initialization vector.
protected static byte[]	newIv(Random random) Generates a new initialization vector.

Methods inherited from class java.lang.Object

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

Field Detail

KEY_SIZE

public static final int KEY_SIZE

Key size in bits.

See Also:

Constant Field Values

KEY_SIZE_IN_BYTES

public static final int KEY_SIZE_IN_BYTES

Key size in bytes.

See Also:

Constant Field Values

BLOCK_SIZE

public static final int BLOCK_SIZE

AES block size in bits.

See Also:

Constant Field Values

BLOCK_SIZE_IN_BYTES

public static final int BLOCK_SIZE_IN_BYTES

AES block size in bytes.

See Also:

Constant Field Values

Constructor Detail

Aes

public Aes()

Method Detail

newIv

protected static byte[] newIv(Random random)

Generates a new initialization vector.

Parameters:

random - a random to use.

Returns:

a new initialization vector.

newIv

public static byte[] newIv()

Generates a new initialization vector.

Returns:

a new initialization vector.

encrypt

public abstract byte[] encrypt(byte[] iv,
             byte[] decrypted)

Encrypts given decrypted. Any implementation/provider specific exception will thrown as wrapped in a RuntimeException.

Parameters:

iv - initialization vector

decrypted - the bytes to encrypt

Returns:

encrypted output

decrypt

public abstract byte[] decrypt(byte[] iv,
             byte[] encrypted)

Decrypts given encrypted. Any implementation/provider specific exception will be thrown as wrapped in a RuntimeException.

Parameters:

iv - initialization vector

encrypted - the bytes to decrypt

Returns:

decrypted output