org.logi.crypto.padding
Interface Padding

All Known Implementing Classes:

PadZero, PadPKCS5, PadNone, PadPKCS1v15

public interface Padding

Classes implementing this interface implement a padding scheme such as PKCS#5.

Author:

Logi Ragnarsson (logir@logi.org)

See Also:

Crypto.fromString(String)

Method Summary

byte[]	pad(byte[] plaintext, int off, int len, EncryptionKey key) Pad the last, perhaps partial, block of plaintext.
byte[]	unPad(byte[] plaintext, int off, int len, DecryptionKey key) Un-pad the last block of plaintext.

Method Detail

pad

public byte[] pad(byte[] plaintext,
                  int off,
                  int len,
                  EncryptionKey key)
           throws PaddingException

Pad the last, perhaps partial, block of plaintext.

Parameters:

plaintext - The array holding plaintext data to pad.

off - The offset of data within plaintext array.

len - The length of data within plaintext array. This much be less than a single plaintext block.

key - The key which will be used to encrypt the block.

unPad

public byte[] unPad(byte[] plaintext,
                    int off,
                    int len,
                    DecryptionKey key)
             throws PaddingException

Un-pad the last block of plaintext.

Parameters:

padded - The array holding padded plaintext data.

off - The offset of data within padded array.

len - The length of data within padded array.

key - The key which will be used to decrypt the block.