org.spongycastle.crypto.engines

Class RFC3394WrapEngine

java.lang.Object

org.spongycastle.crypto.engines.RFC3394WrapEngine

All Implemented Interfaces:

Wrapper

Direct Known Subclasses:

AESWrapEngine, ARIAWrapEngine, CamelliaWrapEngine, SEEDWrapEngine

public class RFC3394WrapEngine
extends java.lang.Object
implements Wrapper

an implementation of the AES Key Wrapper from the NIST Key Wrap Specification as described in RFC 3394.

For further details see: http://www.ietf.org/rfc/rfc3394.txt and http://csrc.nist.gov/encryption/kms/key-wrap.pdf.

Constructor Summary

Constructors

Constructor and Description
RFC3394WrapEngine(BlockCipher engine) Create a RFC 3394 WrapEngine specifying the encrypt for wrapping, decrypt for unwrapping.
RFC3394WrapEngine(BlockCipher engine, boolean useReverseDirection) Create a RFC 3394 WrapEngine specifying the direction for wrapping and unwrapping..

Method Summary

Modifier and Type	Method and Description
java.lang.String	getAlgorithmName() Return the name of the algorithm the wrapper implements.
void	init(boolean forWrapping, CipherParameters param)
byte[]	unwrap(byte[] in, int inOff, int inLen)
byte[]	wrap(byte[] in, int inOff, int inLen)

Methods inherited from class java.lang.Object

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

Constructor Detail

RFC3394WrapEngine

public RFC3394WrapEngine(BlockCipher engine)

Create a RFC 3394 WrapEngine specifying the encrypt for wrapping, decrypt for unwrapping.

Parameters:

engine - the block cipher to be used for wrapping.

RFC3394WrapEngine

public RFC3394WrapEngine(BlockCipher engine,
                         boolean useReverseDirection)

Create a RFC 3394 WrapEngine specifying the direction for wrapping and unwrapping..

Parameters:

engine - the block cipher to be used for wrapping.

useReverseDirection - true if engine should be used in decryption mode for wrapping, false otherwise.

Method Detail

init

public void init(boolean forWrapping,
                 CipherParameters param)

Specified by:

init in interface Wrapper

getAlgorithmName

public java.lang.String getAlgorithmName()

Description copied from interface: Wrapper

Return the name of the algorithm the wrapper implements.

Specified by:

getAlgorithmName in interface Wrapper

Returns:

the name of the algorithm the wrapper implements.

wrap

public byte[] wrap(byte[] in,
                   int inOff,
                   int inLen)

Specified by:

wrap in interface Wrapper

unwrap

public byte[] unwrap(byte[] in,
                     int inOff,
                     int inLen)
              throws InvalidCipherTextException

Specified by:

unwrap in interface Wrapper

Throws:

InvalidCipherTextException