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 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.

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 4.0.2
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()
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 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.

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 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.


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