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net.rim.device.api.crypto
Interface BlockUnformatterEngine

All Known Implementing Classes:
OAEPUnformatterEngine, PKCS1UnformatterEngine, PKCS5UnformatterEngine

public interface BlockUnformatterEngine

The BlockUnFormatterEngine interface removes any formatting from data.

The BlockFormatterEngine interface applies formatting to data in the form of extra padding.

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  int decryptAndUnformat(byte[] input, int inputOffset, byte[] output, int outputOffset)
          Decrypts the input and then "unformats" it into the original plaintext assuming this block is not the last block in the stream.
 Category: Signed  int decryptAndUnformat(byte[] input, int inputOffset, byte[] output, int outputOffset, boolean lastBlock)
          Decrypts the input and then "unformats" it into the original plaintext.
 Category: Signed  String getAlgorithm()
          Returns the name of the signing algorithm used, eg "PKCS5".
 Category: Signed  int getInputBlockLength()
          Returns the length of an input block in bytes.
 Category: Signed  int getOutputBlockLength()
          Returns the length of an output block in bytes.
 

Method Detail

decryptAndUnformat

public int decryptAndUnformat(byte[] input,
                              int inputOffset,
                              byte[] output,
                              int outputOffset)
                       throws DecodeException,
                              BadPaddingException,
                              CryptoTokenException
Decrypts the input and then "unformats" it into the original plaintext assuming this block is not the last block in the stream.

Parameters:
input - A byte array containing the encoded ciphertext.
inputOffset - The offset, or initial bit position, of the data within the byte array.
output - The byte array that will contain the plaintext.
outputOffset - The offset, or initial bit position, of the data within the byte array.
Returns:
An integer representing the value of the operation.
Throws:
DecodeException - Thrown if the input cannot be decoded properly.
BadPaddingException - Thrown if the input has improper padding.
CryptoTokenException - Thrown when a problem occurs with a 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.

decryptAndUnformat

public int decryptAndUnformat(byte[] input,
                              int inputOffset,
                              byte[] output,
                              int outputOffset,
                              boolean lastBlock)
                       throws DecodeException,
                              BadPaddingException,
                              CryptoTokenException
Decrypts the input and then "unformats" it into the original plaintext.

Parameters:
input - A byte array containing the encoded ciphertext.
inputOffset - The offset, or initial bit position, of the data within the byte array.
output - The byte array that will contain the plaintext.
outputOffset - The offset, or initial bit position, of the data within the byte array.
lastBlock - A boolean flag indicating whether this is the last block in the stream to be decrypted.
Returns:
An integer representing the value of the operation.
Throws:
DecodeException - Thrown if the input cannot be decoded properly.
BadPaddingException - Thrown if the input has improper padding.
CryptoTokenException - Thrown when a problem occurs with a 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 the signing algorithm used, eg "PKCS5".

Returns:
A String representing the name of the algorithm used.
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.

getInputBlockLength

public int getInputBlockLength()
Returns the length of an input block in bytes.

Returns:
An integer representing the length, in bytes, of an input block.
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.

getOutputBlockLength

public int getOutputBlockLength()
Returns the length of an output block in bytes.

Returns:
An integer that represents the length, in bytes, of an output block.
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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