org.logi.crypto.hash
Class SHA1State

java.lang.Object
  org.logi.crypto.Crypto
      org.logi.crypto.hash.HashState
          org.logi.crypto.hash.SHA1State

public class SHA1State

extends HashState

An object of this class holds the state of a SHA-1 fingerprint still being calculated.

This class actually uses java.security.MessageDigest to do all the work.

Field Summary

Fields inherited from class org.logi.crypto.Crypto

BIT, cdsPath, EMPTY_ARRAY, FOUR, keySource, NIBBLE, ONE, primeCertainty, random, TWO, ZERO

Constructor Summary

SHA1State()
Create a new clear SHA1State.

Method Summary

int	blockSize() Return the size of input-blocks for this hash function in bytes.
Fingerprint	calculate() Return a Fingerprint for the curret state, without destroying the state.
java.lang.String	getName() The name of the algorithm is "SHA1".
int	hashSize() Returns the size of a fingerprint in bytes.
void	reset() Reset the internal state of the object.
void	update(byte[] buffer, int offset, int length) Update the hash state with the bytes from buf[offset, offset+length-1].

Methods inherited from class org.logi.crypto.hash.HashState

create, create, getDefaultHashFunction, setDefaultHashFunction, update, update

Methods inherited from class org.logi.crypto.Crypto

binString, binString, equal, equalRelaxed, equalSub, fromHexNibble, fromHexString, fromString, fromString, hexString, hexString, hexString, hexString, hexString, initRandom, initRandom, makeClass, makeInt, makeLong, makeSessionKey, pastSpace, pickBits, pickBits, readBlock, readInt, writeBytes, writeBytes, writeInt

Methods inherited from class java.lang.Object

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

Constructor Detail

SHA1State

public SHA1State()

Create a new clear SHA1State.

Method Detail

getName

public java.lang.String getName()

The name of the algorithm is "SHA1".

Specified by:

getName in class HashState

reset

public void reset()

Reset the internal state of the object.

Specified by:

reset in class HashState

update

public void update(byte[] buffer,
                   int offset,
                   int length)

Update the hash state with the bytes from buf[offset, offset+length-1].

Specified by:

update in class HashState

calculate

public Fingerprint calculate()

Return a Fingerprint for the curret state, without destroying the state.

Specified by:

calculate in class HashState

blockSize

public int blockSize()

Return the size of input-blocks for this hash function in bytes.

Specified by:

blockSize in class HashState

hashSize

public int hashSize()

Returns the size of a fingerprint in bytes.

Specified by:

hashSize in class HashState