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net.rim.device.api.crypto
Class CAST128EncryptorEngine

java.lang.Object
  |
  +--net.rim.device.api.crypto.CAST128EncryptorEngine

All Implemented Interfaces:

BlockEncryptorEngine, SymmetricKeyEncryptorEngine

public final class CAST128EncryptorEngine

extends Object

implements SymmetricKeyEncryptorEngine

Implements the raw functionality of the CAST128 algorithm. The class encrypts only on byte arrays of size block length and will throw an exception otherwise. CAST128 is defined in RFC 2144.

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

Field Summary

static int

BLOCK_LENGTH A public value stating the block length in bytes for the algorithm, namely 8 bytes.

Constructor Summary

CAST128EncryptorEngine(CAST128Key key) Creates a CAST128EncryptorEngineobject given a CAST128 key.

Method Summary

	void	encrypt(byte[] plaintext, int plaintextOffset, byte[] ciphertext, int ciphertextOffset) Encrypts a block of the given plaintext into a block of ciphertext.
	String	getAlgorithm() Returns the name of the algorithm used, ie "CAST128".
	int	getBlockLength() Returns the block length of the engine in bytes.

Methods inherited from class java.lang.Object

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

Field Detail

BLOCK_LENGTH

public static final int BLOCK_LENGTH

A public value stating the block length in bytes for the algorithm, namely 8 bytes.

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

Constructor Detail

CAST128EncryptorEngine

public CAST128EncryptorEngine(CAST128Key key)
                       throws CryptoTokenException,
                              CryptoUnsupportedOperationException

Creates a CAST128EncryptorEngineobject given a CAST128 key.

Parameters:

key - The CAST128 key to use for the engine.

Throws:

CryptoTokenException - Thrown when a problem occurs with a crypto token or the crypto token is invalid.

CryptoUnsupportedOperationException - Thrown if a call is made to an unsupported operation.

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

Method Detail

getAlgorithm

public String getAlgorithm()

Returns the name of the algorithm used, ie "CAST128".

This method will always return the string "CAST128".

Specified by:

getAlgorithm in interface BlockEncryptorEngine

Returns:

A string representing the name of the algorithm.

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

getBlockLength

public int getBlockLength()

Description copied from interface: BlockEncryptorEngine

Returns the block length of the engine in bytes.

Specified by:

getBlockLength in interface BlockEncryptorEngine

Following copied from interface: net.rim.device.api.crypto.BlockEncryptorEngine

Returns:

An integer that represents the number of bytes.

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

encrypt

public void encrypt(byte[] plaintext,
                    int plaintextOffset,
                    byte[] ciphertext,
                    int ciphertextOffset)
             throws CryptoTokenException

Description copied from interface: BlockEncryptorEngine

Encrypts a block of the given plaintext into a block of ciphertext.

Specified by:

encrypt in interface BlockEncryptorEngine

Since:

JDE 3.6

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.