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org.bouncycastle.crypto.encodings

Class PKCS1Encoding

Implemented Interfaces:
AsymmetricBlockCipher
public class PKCS1Encoding
extends java.lang.Object
implements AsymmetricBlockCipher
this does your basic PKCS 1 v1.5 padding - whether or not you should be using this depends on your application - see PKCS1 Version 2 for details.

Constructor Summary

PKCS1Encoding(AsymmetricBlockCipher cipher)

Method Summary

int
getInputBlockSize()
returns the largest size an input block can be.
int
getOutputBlockSize()
returns the maximum size of the block produced by this cipher.
AsymmetricBlockCipher
getUnderlyingCipher()
void
init(boolean forEncryption, CipherParameters param)
initialise the cipher.
byte[]
processBlock(byte[] in, int inOff, int inLen)
process the block of len bytes stored in in from offset inOff.

Constructor Details

PKCS1Encoding

public PKCS1Encoding(AsymmetricBlockCipher cipher)

Method Details

getInputBlockSize

public int getInputBlockSize()
returns the largest size an input block can be.
Specified by:
getInputBlockSize in interface AsymmetricBlockCipher

Returns:
maximum size for an input block.

getOutputBlockSize

public int getOutputBlockSize()
returns the maximum size of the block produced by this cipher.
Specified by:
getOutputBlockSize in interface AsymmetricBlockCipher

Returns:
maximum size of the output block produced by the cipher.

getUnderlyingCipher

public AsymmetricBlockCipher getUnderlyingCipher()

init

public void init(boolean forEncryption,
                 CipherParameters param)
initialise the cipher.
Specified by:
init in interface AsymmetricBlockCipher

Parameters:
forEncryption - if true the cipher is initialised for encryption, if false for decryption.
param - the key and other data required by the cipher.

processBlock

public byte[] processBlock(byte[] in,
                           int inOff,
                           int inLen)
            throws InvalidCipherTextException
process the block of len bytes stored in in from offset inOff.
Specified by:
processBlock in interface AsymmetricBlockCipher

Parameters:
in - the input data
inOff - offset into the in array where the data starts

Returns:
the resulting byte array of the encryption/decryption process.

Throws:
InvalidCipherTextException - data decrypts improperly.

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