com.ibm.crypto.fips.provider

Class AESCipher

java.lang.Object

javax.crypto.CipherSpi

com.ibm.crypto.fips.provider.AESCipher

All Implemented Interfaces:

AlgorithmStatus

public final class AESCipher
extends javax.crypto.CipherSpi
implements AlgorithmStatus

This class implements the AES algorithm in its various modes (ECB, CFB, OFB, CBC, PCBC) and padding schemes (PKCS5Padding, NoPadding).

AES is a 128-bit block cipher with 128, 192, or 256-bit key.

Version:

1.00 18/09/01

Author:

Paschalis Kaltsatis

Field Summary

Fields

Modifier and Type	Field and Description
static int	AES_BLOCK_SIZE
static int[]	AES_KEYSIZES

Constructor Summary

Constructors

Constructor and Description
AESCipher() Creates an instance of AES cipher with default ECB mode and PKCS5Padding.
AESCipher(java.lang.String mode, java.lang.String paddingScheme) Creates an instance of AES cipher with the requested mode and padding.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isFipsApproved() Module identifies if the cryptographic operation (algorithm) is FIPS certified

Methods inherited from class java.lang.Object

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

Field Detail

AES_BLOCK_SIZE

public static final int AES_BLOCK_SIZE

See Also:

Constant Field Values

AES_KEYSIZES

public static final int[] AES_KEYSIZES

Constructor Detail

AESCipher

public AESCipher()

Creates an instance of AES cipher with default ECB mode and PKCS5Padding.

Throws:

java.lang.SecurityException - if this constructor fails to authenticate the JCE framework.

AESCipher

public AESCipher(java.lang.String mode,
         java.lang.String paddingScheme)
          throws java.security.NoSuchAlgorithmException,
                 javax.crypto.NoSuchPaddingException

Creates an instance of AES cipher with the requested mode and padding.

Parameters:

mode - the cipher mode

paddingScheme - the padding mechanism

Throws:

java.security.NoSuchAlgorithmException - if the required cipher mode is unavailable

javax.crypto.NoSuchPaddingException - if the required padding mechanism is unavailable

Method Detail

isFipsApproved

public boolean isFipsApproved()

Description copied from interface: AlgorithmStatus

Module identifies if the cryptographic operation (algorithm) is FIPS certified

Specified by:

isFipsApproved in interface AlgorithmStatus

See Also:

AlgorithmStatus.isFipsApproved()