cryptix.provider.cipher
public final class LOKI91 extends Cipher implements SymmetricCipher
LOKI91 is a 64-bit symmetric block cipher with a 64-bit user key. See LOKI91KeyGenerator for information about weak keys.
This current version is based on special C-code obtained, under license, from The School of Computer Science, UC, UNSW. The speed gain is achieved by pre-computing the 4,096 values of the substitutions (S-Box) used by the algorithm as well as the permutations for all possible 256 input values for each of the four 8-bit blocks.
References:
Copyright © 1997
Systemics Ltd on behalf of the
Cryptix Development Team.
All rights reserved.
$Revision: 1.3 $
Since: Cryptix 2.2.2
Constructor Summary | |
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LOKI91()
Constructs a LOKI91 cipher object, in the UNINITIALIZED state.
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Method Summary | |
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Object | clone()
Always throws a CloneNotSupportedException (cloning of ciphers is not
supported for security reasons). |
protected int | engineBlockSize()
SPI: Returns the length of an input block, in bytes.
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protected void | engineInitDecrypt(Key key)
SPI: Initializes this cipher for decryption, using the
specified key.
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protected void | engineInitEncrypt(Key key)
SPI: Initializes this cipher for encryption, using the
specified key.
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protected int | engineUpdate(byte[] in, int inOffset, int inLen, byte[] out, int outOffset)
SPI: This is the main engine method for updating data.
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protected void | finalize()
Cleans up resources used by this instance, if necessary. |
static LinkStatus | getLinkStatus()
Gets an object representing the native linking status of this class. |
Returns: the length in bytes of an input block for this cipher.
Parameters: key the key to use for decryption.
Throws: KeyException if the key is invalid.
Parameters: key the key to use for encryption.
Throws: KeyException if the key is invalid.
in and out may be the same array, and the input and output regions may overlap.
Parameters: in the input data. inOffset the offset into in specifying where the data starts. inLen the length of the subarray. out the output array. outOffset the offset indicating where to start writing into the out array.
Returns: the number of bytes written.
Throws: CryptixException if the native library is being used, and it reports an error.