Back to index...

	/*
	* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.security.pkcs11;

	import java.math.BigInteger;

	import java.security.*;
	import java.security.spec.*;

	import javax.crypto.interfaces.*;
	import javax.crypto.spec.*;

	import static sun.security.pkcs11.TemplateManager.*;
	import sun.security.pkcs11.wrapper.*;
	import static sun.security.pkcs11.wrapper.PKCS11Constants.*;

	/**
	* DH KeyFactory implementation.
	*
	* @author Andreas Sterbenz
	* @since 1.5
	*/
	final class P11DHKeyFactory extends P11KeyFactory {

	P11DHKeyFactory(Token token, String algorithm) {
	super(token, algorithm);
	}

	PublicKey implTranslatePublicKey(PublicKey key) throws InvalidKeyException {
	try {
	if (key instanceof DHPublicKey) {
	DHPublicKey dhKey = (DHPublicKey)key;
	DHParameterSpec params = dhKey.getParams();
	return generatePublic(
	dhKey.getY(),
	params.getP(),
	params.getG()
	);
	} else if ("X.509".equals(key.getFormat())) {
	// let SunJCE provider parse for us, then recurse
	try {
	KeyFactory factory = implGetSoftwareFactory();
	key = (PublicKey)factory.translateKey(key);
	return implTranslatePublicKey(key);
	} catch (GeneralSecurityException e) {
	throw new InvalidKeyException("Could not translate key", e);
	}
	} else {
	throw new InvalidKeyException("PublicKey must be instance "
	+ "of DHPublicKey or have X.509 encoding");
	}
	} catch (PKCS11Exception e) {
	throw new InvalidKeyException("Could not create DH public key", e);
	}
	}

	PrivateKey implTranslatePrivateKey(PrivateKey key)
	throws InvalidKeyException {
	try {
	if (key instanceof DHPrivateKey) {
	DHPrivateKey dhKey = (DHPrivateKey)key;
	DHParameterSpec params = dhKey.getParams();
	return generatePrivate(
	dhKey.getX(),
	params.getP(),
	params.getG()
	);
	} else if ("PKCS#8".equals(key.getFormat())) {
	// let SunJCE provider parse for us, then recurse
	try {
	KeyFactory factory = implGetSoftwareFactory();
	key = (PrivateKey)factory.translateKey(key);
	return implTranslatePrivateKey(key);
	} catch (GeneralSecurityException e) {
	throw new InvalidKeyException("Could not translate key", e);
	}
	} else {
	throw new InvalidKeyException("PrivateKey must be instance "
	+ "of DHPrivateKey or have PKCS#8 encoding");
	}
	} catch (PKCS11Exception e) {
	throw new InvalidKeyException("Could not create DH private key", e);
	}
	}

	// see JCA spec
	protected PublicKey engineGeneratePublic(KeySpec keySpec)
	throws InvalidKeySpecException {
	token.ensureValid();
	if (keySpec instanceof X509EncodedKeySpec) {
	try {
	KeyFactory factory = implGetSoftwareFactory();
	PublicKey key = factory.generatePublic(keySpec);
	return implTranslatePublicKey(key);
	} catch (GeneralSecurityException e) {
	throw new InvalidKeySpecException
	("Could not create DH public key", e);
	}
	}
	if (keySpec instanceof DHPublicKeySpec == false) {
	throw new InvalidKeySpecException("Only DHPublicKeySpec and "
	+ "X509EncodedKeySpec supported for DH public keys");
	}
	try {
	DHPublicKeySpec ds = (DHPublicKeySpec)keySpec;
	return generatePublic(
	ds.getY(),
	ds.getP(),
	ds.getG()
	);
	} catch (PKCS11Exception e) {
	throw new InvalidKeySpecException
	("Could not create DH public key", e);
	}
	}

	// see JCA spec
	protected PrivateKey engineGeneratePrivate(KeySpec keySpec)
	throws InvalidKeySpecException {
	token.ensureValid();
	if (keySpec instanceof PKCS8EncodedKeySpec) {
	try {
	KeyFactory factory = implGetSoftwareFactory();
	PrivateKey key = factory.generatePrivate(keySpec);
	return implTranslatePrivateKey(key);
	} catch (GeneralSecurityException e) {
	throw new InvalidKeySpecException
	("Could not create DH private key", e);
	}
	}
	if (keySpec instanceof DHPrivateKeySpec == false) {
	throw new InvalidKeySpecException("Only DHPrivateKeySpec and "
	+ "PKCS8EncodedKeySpec supported for DH private keys");
	}
	try {
	DHPrivateKeySpec ds = (DHPrivateKeySpec)keySpec;
	return generatePrivate(
	ds.getX(),
	ds.getP(),
	ds.getG()
	);
	} catch (PKCS11Exception e) {
	throw new InvalidKeySpecException
	("Could not create DH private key", e);
	}
	}

	private PublicKey generatePublic(BigInteger y, BigInteger p, BigInteger g)
	throws PKCS11Exception {
	CK_ATTRIBUTE[] attributes = new CK_ATTRIBUTE[] {
	new CK_ATTRIBUTE(CKA_CLASS, CKO_PUBLIC_KEY),
	new CK_ATTRIBUTE(CKA_KEY_TYPE, CKK_DH),
	new CK_ATTRIBUTE(CKA_VALUE, y),
	new CK_ATTRIBUTE(CKA_PRIME, p),
	new CK_ATTRIBUTE(CKA_BASE, g),
	};
	attributes = token.getAttributes
	(O_IMPORT, CKO_PUBLIC_KEY, CKK_DH, attributes);
	Session session = null;
	try {
	session = token.getObjSession();
	long keyID = token.p11.C_CreateObject(session.id(), attributes);
	return P11Key.publicKey
	(session, keyID, "DH", p.bitLength(), attributes);
	} finally {
	token.releaseSession(session);
	}
	}

	private PrivateKey generatePrivate(BigInteger x, BigInteger p,
	BigInteger g) throws PKCS11Exception {
	CK_ATTRIBUTE[] attributes = new CK_ATTRIBUTE[] {
	new CK_ATTRIBUTE(CKA_CLASS, CKO_PRIVATE_KEY),
	new CK_ATTRIBUTE(CKA_KEY_TYPE, CKK_DH),
	new CK_ATTRIBUTE(CKA_VALUE, x),
	new CK_ATTRIBUTE(CKA_PRIME, p),
	new CK_ATTRIBUTE(CKA_BASE, g),
	};
	attributes = token.getAttributes
	(O_IMPORT, CKO_PRIVATE_KEY, CKK_DH, attributes);
	Session session = null;
	try {
	session = token.getObjSession();
	long keyID = token.p11.C_CreateObject(session.id(), attributes);
	return P11Key.privateKey
	(session, keyID, "DH", p.bitLength(), attributes);
	} finally {
	token.releaseSession(session);
	}
	}

	<T extends KeySpec> T implGetPublicKeySpec(P11Key key, Class<T> keySpec,
	Session[] session) throws PKCS11Exception, InvalidKeySpecException {
	if (DHPublicKeySpec.class.isAssignableFrom(keySpec)) {
	session[0] = token.getObjSession();
	CK_ATTRIBUTE[] attributes = new CK_ATTRIBUTE[] {
	new CK_ATTRIBUTE(CKA_VALUE),
	new CK_ATTRIBUTE(CKA_PRIME),
	new CK_ATTRIBUTE(CKA_BASE),
	};
	long keyID = key.getKeyID();
	try {
	token.p11.C_GetAttributeValue(session[0].id(), keyID, attributes);
	} finally {
	key.releaseKeyID();
	}
	KeySpec spec = new DHPublicKeySpec(
	attributes[0].getBigInteger(),
	attributes[1].getBigInteger(),
	attributes[2].getBigInteger()
	);
	return keySpec.cast(spec);
	} else { // X.509 handled in superclass
	throw new InvalidKeySpecException("Only DHPublicKeySpec and "
	+ "X509EncodedKeySpec supported for DH public keys");
	}
	}

	<T extends KeySpec> T implGetPrivateKeySpec(P11Key key, Class<T> keySpec,
	Session[] session) throws PKCS11Exception, InvalidKeySpecException {
	if (DHPrivateKeySpec.class.isAssignableFrom(keySpec)) {
	session[0] = token.getObjSession();
	CK_ATTRIBUTE[] attributes = new CK_ATTRIBUTE[] {
	new CK_ATTRIBUTE(CKA_VALUE),
	new CK_ATTRIBUTE(CKA_PRIME),
	new CK_ATTRIBUTE(CKA_BASE),
	};
	long keyID = key.getKeyID();
	try {
	token.p11.C_GetAttributeValue(session[0].id(), keyID, attributes);
	} finally {
	key.releaseKeyID();
	}
	KeySpec spec = new DHPrivateKeySpec(
	attributes[0].getBigInteger(),
	attributes[1].getBigInteger(),
	attributes[2].getBigInteger()
	);
	return keySpec.cast(spec);
	} else { // PKCS#8 handled in superclass
	throw new InvalidKeySpecException("Only DHPrivateKeySpec "
	+ "and PKCS8EncodedKeySpec supported for DH private keys");
	}
	}

	KeyFactory implGetSoftwareFactory() throws GeneralSecurityException {
	return KeyFactory.getInstance("DH", P11Util.getSunJceProvider());
	}

	}

Back to index...