com.fasteasytrade.JRandTest.Algo
Class SHA1Random

java.lang.Object
  com.fasteasytrade.JRandTest.IO.FileRandomStream
      com.fasteasytrade.JRandTest.IO.FileAlgoRandomStream
          com.fasteasytrade.JRandTest.Algo.SHA1Random

All Implemented Interfaces:

AlgoRandomStream, RandomStream

public class SHA1Random

extends FileAlgoRandomStream

SHA1 algorithm as a random stream based on SHA1 message digest class.

Implementation is based on SHA1 algorithm in NIST test package.

Author:

Zur Aougav

Field Summary

(package private) SHA1	algo
(package private) byte[]	iv random IV to SHA1 class
(package private) byte[]	key random Key to SHA1 class.
(package private) byte[]	outAlgoBuffer outAlgoBuffer is filled with key array, the first time.
(package private) int	outAlgoBufferIx

Fields inherited from class com.fasteasytrade.JRandTest.IO.FileAlgoRandomStream

maxCount, privateKey, privateKeyLength, publicKey, publicKeyLength

Fields inherited from class com.fasteasytrade.JRandTest.IO.FileRandomStream

actualSize, buffer, count, countLastRead, filename, open, SIZE

Constructor Summary

SHA1Random()

SHA1Random(String keyFileName)

Method Summary

static void	main(String[] args)
boolean	openInputStream() open the input stream.
byte	readByte() read one byte from a file.
int	readInt() Processing is similar to readByte.
long	readLong() Processing is similar to readByte.
void	setup() setup will be implemented by each subclass
void	setupKeys() set up length and new arrays to public and private keys will be implemented by each algorithm

Methods inherited from class com.fasteasytrade.JRandTest.IO.FileAlgoRandomStream

getFilename, setFilename, setPrivateKey, setPrivateKeyFromFile, setPublicKey, setPublicKeyFromFile

Methods inherited from class com.fasteasytrade.JRandTest.IO.FileRandomStream

closeInputStream, finalize, isOpen

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.fasteasytrade.JRandTest.IO.RandomStream

closeInputStream, isOpen

Field Detail

algo

SHA1 algo

outAlgoBuffer

byte[] outAlgoBuffer

outAlgoBuffer is filled with key array, the first time. The buffer is used as an input and output to SHA1.

outAlgoBufferIx

int outAlgoBufferIx

iv

byte[] iv

random IV to SHA1 class

key

byte[] key

random Key to SHA1 class. Used as the first update input buffer to SHA1 (key is copied into outAlgoBuffer).

Constructor Detail

SHA1Random

public SHA1Random()

SHA1Random

public SHA1Random(String keyFileName)

Method Detail

setupKeys

public void setupKeys()

Description copied from interface: AlgoRandomStream

set up length and new arrays to public and private keys

will be implemented by each algorithm

Specified by:

setupKeys in interface AlgoRandomStream

Overrides:

setupKeys in class FileAlgoRandomStream

See Also:

AlgoRandomStream.setupKeys()

setup

public void setup()

Description copied from class: FileAlgoRandomStream

setup will be implemented by each subclass

Specified by:

setup in interface AlgoRandomStream

Overrides:

setup in class FileAlgoRandomStream

See Also:

makes only once a new SHA1 object and an IV vector.

openInputStream

public boolean openInputStream()
                        throws Exception

Description copied from interface: RandomStream

open the input stream.

Specified by:

openInputStream in interface RandomStream

Overrides:

openInputStream in class FileRandomStream

Throws:

Exception

See Also:

if filename exists (not null), we open file and later will encrypt it. Else, algorithm will generate random data (as PRNG).

readByte

public byte readByte()
              throws Exception

Description copied from interface: RandomStream

read one byte from a file.

first time ( if !isOpen() ) open file/stream, and return byte

at end of file close stream and returns -1

Specified by:

readByte in interface RandomStream

Overrides:

readByte in class FileAlgoRandomStream

Throws:

Exception

See Also:

RandomStream.readByte()

readInt

public int readInt()
            throws Exception

Description copied from interface: RandomStream

Processing is similar to readByte.

Specified by:

readInt in interface RandomStream

Overrides:

readInt in class FileAlgoRandomStream

Throws:

Exception

See Also:

RandomStream.readInt()

readLong

public long readLong()
              throws Exception

Description copied from interface: RandomStream

Processing is similar to readByte.

Specified by:

readLong in interface RandomStream

Overrides:

readLong in class FileAlgoRandomStream

Throws:

Exception

See Also:

RandomStream.readLong()

main

public static void main(String[] args)