iaik.pkcs.pkcs11.provider.signatures.dsa

Class InternalSha1DsaSignature

java.lang.Object

java.security.SignatureSpi

iaik.pkcs.pkcs11.provider.signatures.PKCS11Signature

iaik.pkcs.pkcs11.provider.signatures.dsa.InternalSha1DsaSignature

All Implemented Interfaces:

PKCS11EngineClass

public class InternalSha1DsaSignature
extends PKCS11Signature

This is an implementation of a Signature class that uses the IAIK PKCS#11 wrapper to access the token. It only works with IAIKPKCS11PrivateKey and IAIKPKCS11PublicKey. This version uses the CKM_DSA_SHA1 mechanism to create the signature; i.e. it creates the hash on the token, if the PKCS#11 module itself is implemented in such a way and the token can do the hashing.

Author:

Karl Scheibelhofer

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.lang.String	SIGNATURE_ALGORITHM_NAME The JCA standard name of this signature algorithm.

Fields inherited from class iaik.pkcs.pkcs11.provider.signatures.PKCS11Signature

currentKeyIsSoftwareKey_, initialized_, operationState_, pkcs11OperationInitialized_, privateKey_, publicKey_, session_, SIGN, softwareDelegate_, tokenManager_, usedMechanismInfos_, usedMechanisms_, VERIFY

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

Constructors

Constructor and Description
InternalSha1DsaSignature() Public default constructor to enable instantiation via Class.forName(String).

Method Summary

Modifier and Type	Method and Description
protected java.lang.String	getAlgorithmName() Get the JCA standard name of this signature algorithm.
protected iaik.pkcs.pkcs11.Mechanism	getMechanism() Get the mechanism of this signature object.
protected byte[]	pkcs11Sign() Create the signature value (X.509 format).
protected boolean	pkcs11Verify(byte[] signature) Verifies the given signature (X.509 format).

Methods inherited from class iaik.pkcs.pkcs11.provider.signatures.PKCS11Signature

engineGetParameter, engineInitSign, engineInitVerify, engineSetParameter, engineSetParameter, engineSign, engineUpdate, engineUpdate, engineVerify, finalize, finalizePkcs11Operation, getUsedMechanismFeatures, getUsedMechanisms, initializePkcs11Operation, initializeSession, initializeSoftwareDelegate, isSupportedBy, pkcs11GetParameter, pkcs11InitSign, pkcs11InitVerify, pkcs11SetParameter, pkcs11SetParameter, pkcs11Update, pkcs11Update

Methods inherited from class java.security.SignatureSpi

clone, engineGetParameters, engineInitSign, engineSign, engineUpdate, engineVerify

Methods inherited from class java.lang.Object

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

Field Detail

SIGNATURE_ALGORITHM_NAME

protected static java.lang.String SIGNATURE_ALGORITHM_NAME

The JCA standard name of this signature algorithm.

Constructor Detail

InternalSha1DsaSignature

public InternalSha1DsaSignature()

Public default constructor to enable instantiation via Class.forName(String).

Method Detail

getMechanism

protected iaik.pkcs.pkcs11.Mechanism getMechanism()

Get the mechanism of this signature object. This implementation returns a mechanism with CKM_DSA_SHA1 as ID.

Returns:

The mechanism this object uses for signing and verification.

Postconditions:

(result <> null)

getAlgorithmName

protected java.lang.String getAlgorithmName()

Get the JCA standard name of this signature algorithm.

Specified by:

getAlgorithmName in class PKCS11Signature

Returns:

The JCA standard name of this signature algorithm.

Postconditions:

(result <> null)

pkcs11Sign

protected byte[] pkcs11Sign()
                     throws java.security.SignatureException

Create the signature value (X.509 format).

Overrides:

pkcs11Sign in class PKCS11Signature

Returns:

A byte array holding the signature.

Throws:

java.security.SignatureException - If an error occurs when creating the signature.

Preconditions:

(operationState_ == SIGN) and (initialized_ == true)

pkcs11Verify

protected boolean pkcs11Verify(byte[] signature)
                        throws java.security.SignatureException

Verifies the given signature (X.509 format).

Overrides:

pkcs11Verify in class PKCS11Signature

Parameters:

signature - The signature bytes to be verified.

Returns:

true if signature is OK, false otherwise.

Throws:

java.security.SignatureException - If an error occurs when verifying the signature.

Preconditions:

(operationState_ == VERIFY) and (initialized_ == true)