com.arsdigita.acs.util.crypt
Class SHA1

java.lang.Object
  |
  +--com.arsdigita.acs.util.crypt.MessageDigest
        |
        +--com.arsdigita.acs.util.crypt.SHA1

public final class SHA1

extends MessageDigest

This is a simple port of Steve Reid's SHA-1 code into Java. I've run his test vectors through the code and they all pass.

Field Summary

static java.lang.String

cvsId

Fields inherited from class com.arsdigita.acs.util.crypt.MessageDigest

digestBits, digestValid

Constructor Summary

SHA1()

Method Summary

java.lang.String	digout() Print out the digest in a form that can be easily compared to the test vectors.
void	finish() Complete processing on the message digest.
java.lang.String	getAlg() Return a string that identifies this algorithm
void	init() SHA1Init - Initialize new context
static void	main(java.lang.String[] args) This is a test program for the SHA1 algorithm.
void	update(byte b) Add one byte to the digest.

Methods inherited from class com.arsdigita.acs.util.crypt.MessageDigest

benchmark, computeDigest, computeDigest, isEqual, isEqual, toString, update, update, update, update, update, update, update, update, update, update, update, updateASCII

Methods inherited from class java.lang.Object

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

Field Detail

cvsId

public static final java.lang.String cvsId

Constructor Detail

SHA1

public SHA1()

Method Detail

init

public void init()

SHA1Init - Initialize new context

Overrides:

init in class MessageDigest

update

public void update(byte b)

Add one byte to the digest. When this is implemented all of the abstract class methods end up calling this method for types other than bytes.

Overrides:

update in class MessageDigest

finish

public void finish()

Complete processing on the message digest.

Overrides:

finish in class MessageDigest

getAlg

public java.lang.String getAlg()

Return a string that identifies this algorithm

Overrides:

getAlg in class MessageDigest

digout

public java.lang.String digout()

Print out the digest in a form that can be easily compared to the test vectors.

main

public static void main(java.lang.String[] args)

This is a test program for the SHA1 algorithm. It puts the three test vectors through the algorithm and prints out the results (they should match.) Then it runs the MessageDigest benchmark method to see how fast it is. on my P133 its about 110 - 120K bytes/second. It then compares it to MD5, which is about 150K bytes/second. The reference to MoreOutputStream can be deleted. This is a small class that opens a window to display the results. This works around Symantec Cafe's tendency to shut down the DOS window after showing the output, and the inability to scroll back in a DOS window.