org.logi.crypto.modes
Class DecryptMode

java.lang.Object
  org.logi.crypto.Crypto
      org.logi.crypto.modes.DecryptMode

Direct Known Subclasses:

DecryptCBC, DecryptCFB, DecryptECB, DecryptOFB

public abstract class DecryptMode

extends Crypto

DecryptMode objects are used to decrypt ciphertext generated with a correpsonding EncryptMode object. They must in most cases be initialized with the appropriate key.

See Also:

EncryptMode

Field Summary

Fields inherited from class org.logi.crypto.Crypto

BIT, cdsPath, EMPTY_ARRAY, FOUR, keySource, NIBBLE, ONE, primeCertainty, random, TWO, ZERO

Constructor Summary

DecryptMode()

Method Summary

void	close() Close files and kill threads owned by the object.
abstract byte[]	decrypt(byte[] source, int i, int length) Send bytes to the DecryptMode for decryption.
void	finalize() This finalizer calls close().
abstract CipherKey	getKey() Return the key used for decryption.
abstract int	plainBlockSize() Return the size of the blocks of plaintext output by this object.
abstract void	setKey(CipherKey key) Set the key to use for decryption.

Methods inherited from class org.logi.crypto.Crypto

binString, binString, equal, equalRelaxed, equalSub, fromHexNibble, fromHexString, fromString, fromString, hexString, hexString, hexString, hexString, hexString, initRandom, initRandom, makeClass, makeInt, makeLong, makeSessionKey, pastSpace, pickBits, pickBits, readBlock, readInt, writeBytes, writeBytes, writeInt

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DecryptMode

public DecryptMode()

Method Detail

getKey

public abstract CipherKey getKey()

Return the key used for decryption.

setKey

public abstract void setKey(CipherKey key)

Set the key to use for decryption. The key can only be set once in this version of the library. The 1.1.x and eventually 1.2.x series allows dynamic re-keying.

plainBlockSize

public abstract int plainBlockSize()

Return the size of the blocks of plaintext output by this object.

decrypt

public abstract byte[] decrypt(byte[] source,
                               int i,
                               int length)

Send bytes to the DecryptMode for decryption.

Decrypt length bytes from source, starting at i and return the plaintext. Data may be encrypted in blocks in which case only whole blocks of plaintext are written to dest. Any remaining data will be stored and prepended to source in the next call to decrypt.

close

public void close()

Close files and kill threads owned by the object. This should be called to make sure all resources are freed.

finalize

public void finalize()

This finalizer calls close(). Note, however, that java offers no guarantee that the finalizer is ever called.