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Bouncy Castle Cryptography 1.11 API Specification: Class SHA1Digest
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Bouncy Castle Cryptography 1.11
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org.bouncycastle.crypto.digests
Class SHA1Digest

java.lang.Object
  |
  +--org.bouncycastle.crypto.digests.GeneralDigest
        |
        +--org.bouncycastle.crypto.digests.SHA1Digest
All Implemented Interfaces:
Digest
public class SHA1Digest
extends GeneralDigest

implementation of SHA-1 as outlined in "Handbook of Applied Cryptography", pages 346 - 349. It is interesting to ponder why the, apart from the extra IV, the other difference here from MD5 is the "endienness" of the word processing!

Constructor Summary
SHA1Digest()
          Standard constructor
SHA1Digest(SHA1Digest t)
          Copy constructor.
 
Method Summary
 int doFinal(byte[] out, int outOff)
          close the digest, producing the final digest value.
 java.lang.String getAlgorithmName()
          return the algorithm name
 int getDigestSize()
          return the size, in bytes, of the digest produced by this message digest.
protected  void processBlock()
           
protected  void processLength(long bitLength)
           
protected  void processWord(byte[] in, int inOff)
           
 void reset()
          reset the chaining variables
 
Methods inherited from class org.bouncycastle.crypto.digests.GeneralDigest
finish, update, update
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SHA1Digest

public SHA1Digest()
Standard constructor

SHA1Digest

public SHA1Digest(SHA1Digest t)
Copy constructor. This will copy the state of the provided message digest.
Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()
Description copied from interface: Digest
return the algorithm name
Following copied from interface: org.bouncycastle.crypto.Digest
Returns:
the algorithm name

getDigestSize

public int getDigestSize()
Description copied from interface: Digest
return the size, in bytes, of the digest produced by this message digest.
Following copied from interface: org.bouncycastle.crypto.Digest
Returns:
the size, in bytes, of the digest produced by this message digest.

processWord

protected void processWord(byte[] in,
                           int inOff)
Overrides:
processWord in class GeneralDigest

processLength

protected void processLength(long bitLength)
Overrides:
processLength in class GeneralDigest

doFinal

public int doFinal(byte[] out,
                   int outOff)
Description copied from interface: Digest
close the digest, producing the final digest value. The doFinal call leaves the digest reset.
Following copied from interface: org.bouncycastle.crypto.Digest
Parameters:
out - the array the digest is to be copied into.
outOff - the offset into the out array the digest is to start at.

reset

public void reset()
reset the chaining variables
Overrides:
reset in class GeneralDigest

processBlock

protected void processBlock()
Overrides:
processBlock in class GeneralDigest
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