Package org.bouncycastle.crypto.internal.signers

Class BaseRsaDigestSigner

java.lang.Object

org.bouncycastle.crypto.internal.signers.BaseRsaDigestSigner

All Implemented Interfaces:

Signer

public class BaseRsaDigestSigner
extends java.lang.Object
implements Signer

Constructor Summary

Constructors

Constructor	Description
BaseRsaDigestSigner(AsymmetricBlockCipher rsaEngine, Digest digest, ASN1ObjectIdentifier digestOid)

Method Summary

Modifier and Type	Method	Description
static boolean	checkPKCS1Sig(byte[] expected, byte[] sig)
byte[]	generateSignature()	Generate a signature for the message we've been loaded with using the key we were initialised with.
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 Detail

BaseRsaDigestSigner

public BaseRsaDigestSigner(AsymmetricBlockCipher rsaEngine,
                           Digest digest,
                           ASN1ObjectIdentifier digestOid)

Method Detail

init

public void init(boolean forSigning,
                 CipherParameters parameters)

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()
                         throws CryptoException,
                                DataLengthException

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

Specified by:

generateSignature in interface Signer

Throws:

CryptoException

DataLengthException

verifySignature

public boolean verifySignature(byte[] signature)
                        throws InvalidSignatureException

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

Specified by:

verifySignature in interface Signer

Throws:

InvalidSignatureException

reset

public void reset()

Description copied from interface: Signer

reset the internal state

Specified by:

reset in interface Signer

checkPKCS1Sig

public static boolean checkPKCS1Sig(byte[] expected,
                                    byte[] sig)