Package org.bouncycastle.crypto.signers

Class DSADigestSigner

java.lang.Object

org.bouncycastle.crypto.signers.DSADigestSigner

All Implemented Interfaces:

Signer

public class DSADigestSigner
extends Object
implements Signer

Constructor Summary

Constructors

Constructor	Description
DSADigestSigner(DSAExt dsa, Digest digest, DSAEncoding encoding)
DSADigestSigner(DSA dsa, Digest digest)

Method Summary

Modifier and Type	Method	Description
byte[]	generateSignature()	Generate a signature for the message we've been loaded with using the key we were initialised with.
protected BigInteger	getOrder()
void	init(boolean forSigning, CipherParameters parameters)	Initialise the signer for signing or verification.
void	reset()	reset the internal state
void	update(byte input)	update the internal digest with the byte b
void	update(byte[] input, int inOff, int length)	update the internal digest with the byte array in
boolean	verifySignature(byte[] signature)	return true if the internal state represents the signature described in the passed in array.

Methods inherited from class java.lang.Object

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

Constructor Details

DSADigestSigner

public DSADigestSigner(DSA dsa,
 Digest digest)

DSADigestSigner

public DSADigestSigner(DSAExt dsa,
 Digest digest,
 DSAEncoding encoding)

Method Details

init

public void init(boolean forSigning,
 CipherParameters parameters)

Description copied from interface: Signer

Initialise the signer for signing or verification.

Specified by:

init in interface Signer

Parameters:

forSigning - true if for signing, false otherwise

parameters - necessary parameters.

update

public void update(byte input)

update the internal digest with the byte b

Specified by:

update in interface Signer

update

public void update(byte[] input,
 int inOff,
 int length)

update the internal digest with the byte array in

Specified by:

update in interface Signer

generateSignature

public byte[] generateSignature()

Generate a signature for the message we've been loaded with using the key we were initialised with.

Specified by:

generateSignature in interface Signer

verifySignature

public boolean verifySignature(byte[] signature)

Description copied from interface: Signer

return true if the internal state represents the signature described in the passed in array.

Specified by:

verifySignature in interface Signer

reset

public void reset()

Description copied from interface: Signer

reset the internal state

Specified by:

reset in interface Signer

getOrder

protected BigInteger getOrder()