SHOW Signed
 

net.rim.device.api.crypto
Interface BlockDecryptorEngine

All Known Subinterfaces:
PrivateKeyDecryptorEngine, SymmetricKeyDecryptorEngine
All Known Implementing Classes:
CBCDecryptorEngine, XDecryptorEngine

public interface BlockDecryptorEngine

The BlockDecryptorEngine interface describes the functionality of using a block cipher for decryption.

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

Method Summary
 Category: Signed  void decrypt(byte[] ciphertext, int ciphertextOffset, byte[] plaintext, int plaintextOffset)
          Decodes a block of the given ciphertext into a block of plaintext.
 Category: Signed  String getAlgorithm()
          Returns the name of this algorithm, eg "DES".
 Category: Signed  int getBlockLength()
          Returns the block length of the block cipher in bytes.
 

Method Detail

decrypt

public void decrypt(byte[] ciphertext,
                    int ciphertextOffset,
                    byte[] plaintext,
                    int plaintextOffset)
             throws CryptoTokenException
Decodes a block of the given ciphertext into a block of plaintext.

Parameters:
ciphertext - A byte array containing the input that is to be decrypted.
ciphertextOffset - The starting offset, or initial byte position, of the data within the input array.
plaintext - A byte array containing the output from the method.
plaintextOffset - The starting offset, or initial byte position, of the data within the output array.
Throws:
CryptoTokenException - Thrown when an error occurs with the crypto token or the crypto token is invalid.
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.

getAlgorithm

public String getAlgorithm()
Returns the name of this algorithm, eg "DES". The general form of the algorithm is:
"<cipher name>[_<keyBitLength>[_<blockBitLength>[_<numberOfRounds>]]][/<mode>[/<padding>]]"

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()
Returns the block length of the block cipher in bytes.

Returns:
An integer that specifies the length of a block of data.
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.



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