gnu.crypto.hash

Class Haval

public class Haval extends BaseHash

The HAVAL message-digest algorithm is a variable output length, with variable number of rounds. By default, this implementation allows HAVAL to be used as a drop-in replacement for MD5.

References:

  1. HAVAL - A One-Way Hashing Algorithm with Variable Length of Output
    Advances in Cryptology - AUSCRYPT'92, Lecture Notes in Computer Science,
    Springer-Verlag, 1993;
    Y. Zheng, J. Pieprzyk and J. Seberry.

Version: $Revision: 1.3 $

Field Summary
static intHAVAL_128_BIT
static intHAVAL_160_BIT
static intHAVAL_192_BIT
static intHAVAL_224_BIT
static intHAVAL_256_BIT
static intHAVAL_3_ROUND
static intHAVAL_4_ROUND
static intHAVAL_5_ROUND
static intHAVAL_VERSION
Constructor Summary
Haval()

Calls the constructor with two argument using HAVAL_128_BIT as the value for the output size (i.e.

Haval(int size)

Calls the constructor with two arguments using the designated output size, and HAVAL_3_ROUND for the value of number of rounds.

Haval(int size, int rounds)

Constructs a Haval instance with the designated output size (in bytes).

Method Summary
Objectclone()
protected byte[]getResult()
protected byte[]padBuffer()
protected voidresetContext()
booleanselfTest()
protected voidtransform(byte[] in, int i)

Field Detail

HAVAL_128_BIT

public static final int HAVAL_128_BIT

HAVAL_160_BIT

public static final int HAVAL_160_BIT

HAVAL_192_BIT

public static final int HAVAL_192_BIT

HAVAL_224_BIT

public static final int HAVAL_224_BIT

HAVAL_256_BIT

public static final int HAVAL_256_BIT

HAVAL_3_ROUND

public static final int HAVAL_3_ROUND

HAVAL_4_ROUND

public static final int HAVAL_4_ROUND

HAVAL_5_ROUND

public static final int HAVAL_5_ROUND

HAVAL_VERSION

public static final int HAVAL_VERSION

Constructor Detail

Haval

public Haval()

Calls the constructor with two argument using HAVAL_128_BIT as the value for the output size (i.e. 128 bits, and HAVAL_3_ROUND for the value of number of rounds.

Haval

public Haval(int size)

Calls the constructor with two arguments using the designated output size, and HAVAL_3_ROUND for the value of number of rounds.

Parameters: size the output size in bytes of this instance.

Throws: IllegalArgumentException if the designated output size is invalid.

See Also: HAVAL_128_BIT HAVAL_160_BIT HAVAL_192_BIT HAVAL_224_BIT HAVAL_256_BIT

Haval

public Haval(int size, int rounds)

Constructs a Haval instance with the designated output size (in bytes). Valid output size values are 16, 20, 24, 28 and 32. Valid values for rounds are in the range 3..5 inclusive.

Parameters: size the output size in bytes of this instance. rounds the number of rounds to apply when transforming data.

Throws: IllegalArgumentException if the designated output size is invalid, or if the number of rounds is invalid.

See Also: HAVAL_128_BIT HAVAL_160_BIT HAVAL_192_BIT HAVAL_224_BIT HAVAL_256_BIT HAVAL_3_ROUND HAVAL_4_ROUND HAVAL_5_ROUND

Method Detail

clone

public Object clone()

getResult

protected byte[] getResult()

padBuffer

protected byte[] padBuffer()

resetContext

protected void resetContext()

selfTest

public boolean selfTest()

transform

protected void transform(byte[] in, int i)
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