SHOW Signed
 

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

Creates a CAST 128 encryption engine. The CAST algorithm was designed by Carlisle Adams and Stafford Tavares. This version of CAST has a 128 bit key and a 64 bit block size.

This cipher is available worldwide on a royalty-free basis for commercial and non-commercial use.

For more information please refer to RFC 2144. For information on cryptographic algorithms, see Crypto Algorithms.

(@link CAST128Key More information on the key used in this engine.)

Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:
JDE 3.6.0

Field Summary
 Category: Signed static int BLOCK_LENGTH
          A public value stating the block length in bytes for the algorithm, namely 8 bytes.
 
Constructor Summary
 Category: Signed CAST128EncryptorEngine(CAST128Key key)
          Creates a CAST128EncryptorEngineobject given a CAST128 key.
 
Method Summary
 Category: Signed  void encrypt(byte[] plaintext, int plaintextOffset, byte[] ciphertext, int ciphertextOffset)
          Encrypts a block of the given plaintext into a block of ciphertext.
 Category: Signed  String getAlgorithm()
          Returns the name of the algorithm used, ie "CAST128".
 Category: Signed  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.
Since:
JDE 3.6.0
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.
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.
Since:
JDE 3.6.0
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.
Method Detail

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.

Since:
JDE 3.6.0

Following copied from interface: BlockEncryptorEngine
Parameters:
plaintext - A byte array containing the input that is to be encrypted.
plaintextOffset - The starting offset, or initial byte position, of the data within the input array.
ciphertext - A byte array to hold the ciphertext output from the method.
ciphertextOffset - The starting offset, or initial byte position, of the data within the output array.
Throws:
CryptoTokenException - Thrown when an problem occurs with the crypto token or the crypto token is invalid.
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

getAlgorithm

public String getAlgorithm()
Returns the name of the algorithm used, ie "CAST128".

This method will always return the string "CAST128".

Returns:
A string representing the name of the algorithm.
Since:
JDE 3.6.0
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

getBlockLength

public int getBlockLength()
Description copied from interface: BlockEncryptorEngine
Returns the block length of the engine in bytes.

Since:
JDE 3.6.0

Following copied from interface: BlockEncryptorEngine
Returns:
An integer that represents the number of bytes.
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.



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