Package org.bouncycastle.crypto.engines

Class DESedeWrapEngine

java.lang.Object

org.bouncycastle.crypto.engines.DESedeWrapEngine

All Implemented Interfaces:

Wrapper

public class DESedeWrapEngine
extends Object
implements Wrapper

Wrap keys according to draft-ietf-smime-key-wrap-01.txt.

Note:

• this is based on a draft, and as such is subject to change - don't use this class for anything requiring long term storage.
• if you are using this to wrap triple-des keys you need to set the parity bits on the key and, if it's a two-key triple-des key, pad it yourself.

Constructor Summary

Constructors

Constructor	Description
DESedeWrapEngine()

Method Summary

Modifier and Type	Method	Description
String	getAlgorithmName()	Method getAlgorithmName
void	init(boolean forWrapping, CipherParameters param)	Method init
byte[]	unwrap(byte[] in, int inOff, int inLen)	Method unwrap
byte[]	wrap(byte[] in, int inOff, int inLen)	Method wrap

Methods inherited from class java.lang.Object

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

Constructor Detail

DESedeWrapEngine

public DESedeWrapEngine()

Method Detail

init

public void init(boolean forWrapping,
                 CipherParameters param)

Method init

Specified by:

init in interface Wrapper

Parameters:

forWrapping - true if for wrapping, false otherwise.

param - necessary parameters, may include KeyParameter, ParametersWithRandom, and ParametersWithIV

getAlgorithmName

public String getAlgorithmName()

Method getAlgorithmName

Specified by:

getAlgorithmName in interface Wrapper

Returns:

the algorithm name "DESede".

wrap

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

Method wrap

Specified by:

wrap in interface Wrapper

Parameters:

in - byte array containing the encoded key.

inOff - off set into in that the data starts at.

inLen - length of the data.

Returns:

the wrapped bytes.

unwrap

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

Method unwrap

Specified by:

unwrap in interface Wrapper

Parameters:

in - byte array containing the wrapped key.

inOff - off set into in that the data starts at.

inLen - length of the data.

Returns:

the unwrapped bytes.

Throws:

InvalidCipherTextException