org.acplt.oncrpc.apps.jrpcgen
Class JrpcgenSHA

java.lang.Object
  org.acplt.oncrpc.apps.jrpcgen.JrpcgenSHA

public class JrpcgenSHA
extends java.lang.Object

This class implements the SHA-1 algorithm as described in "Federal Information Processing Standards Publication 180-1: Specifications for the Secure Hash Standard. April 17, 1995."

Field Summary

private long	bytecount
private int	H0
private int	H1
private int	H2
private int	H3
private int	H4
private int[]	W Work buffer for calculating the hash.

Constructor Summary

JrpcgenSHA()
Create a new SHA-1 hashing object.

Method Summary

byte[]	getDigest() Retrieve the digest (that is, informally spoken, the "hash value").
long	getHash() Return first 64 bits of hash digest for use as a serialization UID, etc.
private void	process() Process a single block.
void	reset() Reset the hashing engine to start hashing another set of innocent bytes.
void	update(byte b) Update the hash using a single byte (8 bits).
void	update(int i) Update the hash using an integer (32 bits).
void	update(short s) Update the hash using a short integer (16 bits).
void	update(java.lang.String s) Update the hash using a string.

Methods inherited from class java.lang.Object

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

Field Detail

W

private final int[] W

Work buffer for calculating the hash.

bytecount

private long bytecount

H0

private int H0

H1

private int H1

H2

private int H2

H3

private int H3

H4

private int H4

Constructor Detail

JrpcgenSHA

public JrpcgenSHA()

Create a new SHA-1 hashing object.

Method Detail

update

public void update(byte b)

Update the hash using a single byte (8 bits).

Parameters:

b - Byte to hash.

update

public void update(short s)

Update the hash using a short integer (16 bits).

Parameters:

s - Short integer to hash.

update

public void update(int i)

Update the hash using an integer (32 bits).

Parameters:

i - Integer to hash.

update

public void update(java.lang.String s)

Update the hash using a string.

Parameters:

s - String to hash.

reset

public void reset()

Reset the hashing engine to start hashing another set of innocent bytes.

getDigest

public byte[] getDigest()

Retrieve the digest (that is, informally spoken, the "hash value").

Returns:

digest as a series of 20 bytes (80 bits).

getHash

public long getHash()

Return first 64 bits of hash digest for use as a serialization UID, etc.

Returns:

hash digest with only 64 bit size.

process

private void process()

Process a single block. This is pretty much copied verbatim from "Federal Information Processing Standards Publication 180-1: Specifications for the Secure Hash Standard. April 17, 1995.", pp. 9, 10.