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java.lang.Objectgnu.crypto.cipher.BaseCipher
gnu.crypto.cipher.Khazad
public final class Khazad
Khazad is a 64-bit (legacy-level) block cipher that accepts a 128-bit key. The cipher is a uniform substitution-permutation network whose inverse only differs from the forward operation in the key schedule. The overall cipher design follows the Wide Trail strategy, favours component reuse, and permits a wide variety of implementation trade-offs.
References:
Field Summary |
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Fields inherited from class gnu.crypto.cipher.BaseCipher |
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currentBlockSize, currentKey, defaultBlockSize, defaultKeySize, lock, name |
Fields inherited from interface gnu.crypto.cipher.IBlockCipher |
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CIPHER_BLOCK_SIZE, KEY_MATERIAL |
Constructor Summary | |
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Khazad()
Trivial 0-arguments constructor. |
Method Summary | |
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Iterator |
blockSizes()
Returns an Iterator over the supported block sizes. |
Object |
clone()
Returns a clone of this instance. |
void |
decrypt(byte[] in,
int i,
byte[] out,
int j,
Object k,
int bs)
|
void |
encrypt(byte[] in,
int i,
byte[] out,
int j,
Object k,
int bs)
|
Iterator |
keySizes()
Returns an Iterator over the supported key sizes. |
Object |
makeKey(byte[] uk,
int bs)
Expands a user-supplied key material into a session key for a designated block size. |
boolean |
selfTest()
A correctness test that consists of basic symmetric encryption / decryption test(s) for all supported block and key sizes, as well as one (1) variable key Known Answer Test (KAT). |
Methods inherited from class gnu.crypto.cipher.BaseCipher |
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currentBlockSize, decryptBlock, defaultBlockSize, defaultKeySize, encryptBlock, init, name, reset, testKat, testKat |
Methods inherited from class java.lang.Object |
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equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public Khazad()
Method Detail |
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public Object clone()
IBlockCipher
Returns a clone of this instance.
clone
in interface IBlockCipher
clone
in class BaseCipher
public Iterator blockSizes()
IBlockCipher
Returns an Iterator
over the supported block sizes. Each
element returned by this object is an Integer
.
Iterator
over the supported block sizes.public Iterator keySizes()
IBlockCipher
Returns an Iterator
over the supported key sizes. Each element
returned by this object is an Integer
.
Iterator
over the supported key sizes.public Object makeKey(byte[] uk, int bs) throws InvalidKeyException
Expands a user-supplied key material into a session key for a designated block size.
uk
- the 128-bit user-supplied key material.bs
- the desired block size in bytes.
IllegalArgumentException
- if the block size is not 16 (128-bit).
InvalidKeyException
- if the key data is invalid.public void encrypt(byte[] in, int i, byte[] out, int j, Object k, int bs)
public void decrypt(byte[] in, int i, byte[] out, int j, Object k, int bs)
public boolean selfTest()
IBlockCipher
A correctness test that consists of basic symmetric encryption / decryption test(s) for all supported block and key sizes, as well as one (1) variable key Known Answer Test (KAT).
selfTest
in interface IBlockCipher
selfTest
in interface IBlockCipherSpi
selfTest
in class BaseCipher
true
if the implementation passes simple
correctness tests. Returns false
otherwise.
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For the latest news and information visit The GNU Crypto project |
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