org.bouncycastle.crypto.signers

Class DSASigner

Implemented Interfaces:
DSA

public class DSASigner
extends java.lang.Object
implements DSA

The Digital Signature Algorithm - as described in "Handbook of Applied Cryptography", pages 452 - 453.

Method Summary

BigInteger[]
generateSignature(byte[] message)
generate a signature for the given message using the key we were initialised with.
void
init(boolean forSigning, CipherParameters param)
boolean
verifySignature(byte[] message, BigInteger r, BigInteger s)
return true if the value r and s represent a DSA signature for the passed in message for standard DSA the message should be a SHA-1 hash of the real message to be verified.

Method Details

generateSignature

public BigInteger[] generateSignature(byte[] message)
generate a signature for the given message using the key we were initialised with. For conventional DSA the message should be a SHA-1 hash of the message of interest.
Specified by:
generateSignature in interface DSA
Parameters:
message - the message that will be verified later.

init

public void init(boolean forSigning,
                 CipherParameters param)
Specified by:
init in interface DSA

verifySignature

public boolean verifySignature(byte[] message,
                               BigInteger r,
                               BigInteger s)
return true if the value r and s represent a DSA signature for the passed in message for standard DSA the message should be a SHA-1 hash of the real message to be verified.
Specified by:
verifySignature in interface DSA