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cryptix.jce.provider.md
Class RIPEMD160  

java.lang.Object
  java.security.MessageDigestSpi
      cryptix.jce.provider.md.PaddingMD
          cryptix.jce.provider.md.RIPEMD160

All Implemented Interfaces:

java.lang.Cloneable

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public final class RIPEMD160

extends PaddingMD

implements java.lang.Cloneable

Implements the RIPEMD160 message digest algorithm in Java as per the references below:

• Hans Dobbertin, Antoon Bosselaers and Bart Preneel, "RIPEMD160: A Strengthened Version of RIPEMD," 18 April 1996. A joint publication by the German Information Security Agency (POB 20 03 63, D-53133 Bonn, Germany) and the Katholieke Universiteit Leuven, ESAT-COSIC (K. Mercierlaan 94, B-3001 Heverlee, Belgium).
• The hash function RIPEMD-160.

Since:

Cryptix 2.2.2

Version:

$Revision: 1.7 $

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Field Summary
private  int[]	context           160-bit h0, h1, h2, h3, h4 (interim result)
private static int	HASH_SIZE           Size of this hash (in bytes)
(package private) static int	MODE_MD
(package private) static int	MODE_SHA
(package private) static int	MODE_TIGER
private static int[]	R           Constants for the transform method.
private static int[]	Rp           Constants for the transform method.
private static int[]	S           Constants for the transform method.
private static int[]	Sp           Constants for the transform method.
private  int[]	X           512 bits work buffer = 16 x 32-bit words

 

Constructor Summary
	RIPEMD160()
private	RIPEMD160(RIPEMD160 src)

 

Method Summary
java.lang.Object	clone()           Returns a clone of this class.
protected  void	coreDigest(byte[] buf, int off)           Return the hash bytes in buf, starting at offset off.
protected  void	coreReset()           Reset the hash internal structures to initial state.
protected  void	coreUpdate(byte[] block, int offset)           RIPEMD160 basic transformation.
protected  byte[]	engineDigest()           Computes the final digest of the stored bytes and returns them.
protected  int	engineDigest(byte[] buf, int offset, int len)           Computes the final digest of the stored bytes and returns them.
protected  int	engineGetDigestLength()           Returns the length of the digest.
protected  void	engineReset()           Resets the digest engine.
protected  void	engineUpdate(byte input)           Updates the digest with the specified byte.
protected  void	engineUpdate(byte[] input, int offset, int length)           Updates the digest with the specified bytes starting with the offset and proceeding for the specified length.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

R

private static final int[] R

Constants for the transform method. They're defined as static because they're common to all RIPEMD160 instantiated objects; and final since they're non-modifiable.

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Rp

private static final int[] Rp

Constants for the transform method. They're defined as static because they're common to all RIPEMD160 instantiated objects; and final since they're non-modifiable.

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S

private static final int[] S

Constants for the transform method. They're defined as static because they're common to all RIPEMD160 instantiated objects; and final since they're non-modifiable.

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Sp

private static final int[] Sp

Constants for the transform method. They're defined as static because they're common to all RIPEMD160 instantiated objects; and final since they're non-modifiable.

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HASH_SIZE

private static final int HASH_SIZE

Size of this hash (in bytes)

See Also:

Constant Field Values

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context

private int[] context

160-bit h0, h1, h2, h3, h4 (interim result)

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X

private int[] X

512 bits work buffer = 16 x 32-bit words

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MODE_MD

static final int MODE_MD

See Also:

Constant Field Values

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MODE_SHA

static final int MODE_SHA

See Also:

Constant Field Values

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MODE_TIGER

static final int MODE_TIGER

See Also:

Constant Field Values

Constructor Detail

RIPEMD160

public RIPEMD160()

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RIPEMD160

private RIPEMD160(RIPEMD160 src)

Method Detail

clone

public java.lang.Object clone()

Description copied from class: java.security.MessageDigestSpi

Returns a clone of this class. If cloning is not supported, then by default the class throws a CloneNotSupportedException. The MessageDigestSpi provider implementation has to overload this class in order to be cloneable.

Overrides:

clone in class PaddingMD

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coreDigest

protected void coreDigest(byte[] buf,
                          int off)

Description copied from class: PaddingMD

Return the hash bytes in buf, starting at offset off. The subclass is expected to write exactly hashSize bytes in the given buffer. The buffer is guaranteed to be large enough.

Specified by:

coreDigest in class PaddingMD

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coreReset

protected void coreReset()

Description copied from class: PaddingMD

Reset the hash internal structures to initial state.

Specified by:

coreReset in class PaddingMD

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coreUpdate

protected void coreUpdate(byte[] block,
                          int offset)

RIPEMD160 basic transformation.

Transforms context based on 512 bits from input block starting from the offset'th byte.

Specified by:

coreUpdate in class PaddingMD

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engineGetDigestLength

protected int engineGetDigestLength()

Description copied from class: java.security.MessageDigestSpi

Returns the length of the digest. It may be overridden by the provider to return the length of the digest. Default is to return 0. It is concrete for backwards compatibility with JDK1.1 message digest classes.

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engineUpdate

protected void engineUpdate(byte input)

Description copied from class: java.security.MessageDigestSpi

Updates the digest with the specified byte.

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engineUpdate

protected void engineUpdate(byte[] input,
                            int offset,
                            int length)

Description copied from class: java.security.MessageDigestSpi

Updates the digest with the specified bytes starting with the offset and proceeding for the specified length.

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engineDigest

protected byte[] engineDigest()

Description copied from class: java.security.MessageDigestSpi

Computes the final digest of the stored bytes and returns them. It performs any necessary padding. The message digest should reset sensitive data after performing the digest.

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engineDigest

protected int engineDigest(byte[] buf,
                           int offset,
                           int len)
                    throws java.security.DigestException

Description copied from class: java.security.MessageDigestSpi

Computes the final digest of the stored bytes and returns them. It performs any necessary padding. The message digest should reset sensitive data after performing the digest. This method is left concrete for backwards compatibility with JDK1.1 message digest classes.

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engineReset

protected void engineReset()

Description copied from class: java.security.MessageDigestSpi

Resets the digest engine. Reinitializes internal variables and clears sensitive data.

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Home >> All >> cryptix >> jce >> provider >> [ md overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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