net.rim.device.api.crypto
Class RC2EncryptorEngine

java.lang.Object
  extended by net.rim.device.api.crypto.RC2EncryptorEngine
All Implemented Interfaces:
BlockEncryptorEngine, SymmetricKeyEncryptorEngine

public final class RC2EncryptorEngine
extends Object
implements SymmetricKeyEncryptorEngine

The RC2EncryptorEngine implements the encryption functionality of the RC2 block cipher.

We implemented RC2 as per RFC 2268.

RC2 operates on 64 bit blocks and supports key lengths between 1 and 1024 bits.

For information on cryptographic algorithms, see Crypto Algorithms.

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:
BlackBerry API 3.6.0

Field Summary
Category: Signed static int BLOCK_LENGTH
          Represents the block length of the cipher in bytes, namely 8 bytes.
 
Constructor Summary
Category: Signed RC2EncryptorEngine(RC2Key key)
          Creates a RC2EncryptorEngine class based upon a RC2Key that is initialized and used for encryption of the plaintext for all subsequent calls to the class.
 
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, eg "RC2_64" ("RC2_" + keyBitLength).
Category: Signed  int getBlockLength()
          Returns the block length of the engine in bytes.
Category: Signed  int getKeyLength()
          Returns the length of the engine's key 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
Represents the block length of the cipher in bytes, namely 8 bytes.

See Also:
Constant Field Values
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:
BlackBerry API 3.6.0


Constructor Detail

RC2EncryptorEngine

public RC2EncryptorEngine(RC2Key key)
                   throws CryptoTokenException,
                          CryptoUnsupportedOperationException
Creates a RC2EncryptorEngine class based upon a RC2Key that is initialized and used for encryption of the plaintext for all subsequent calls to the class.

Parameters:
key - Contains the key material that will be used for decryption.
Throws:
CryptoTokenException - Thrown when an error occurs with a crypto token or the crypto token is invalid.
CryptoUnsupportedOperationException - Thrown when a call is made to an unsupported operation.
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:
BlackBerry API 3.6.0


Method Detail

getAlgorithm

public String getAlgorithm()
Returns the name of the algorithm used, eg "RC2_64" ("RC2_" + keyBitLength).

Specified by:
getAlgorithm in interface BlockEncryptorEngine
Returns:
A String that represents the name of the algorithm.
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:
BlackBerry API 3.6.0

getBlockLength

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

Specified by:
getBlockLength in 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.
Since:
BlackBerry API 3.6.0

getKeyLength

public int getKeyLength()
Returns the length of the engine's key in bytes.

Returns:
An integer that represents the length of the key.
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:
BlackBerry API 3.6.0

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
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.
Since:
BlackBerry API 3.6.0





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