/* * Copyright (c) 2003, 2005, 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.security.*;import java.security.spec.*; import sun.security.pkcs11.wrapper.PKCS11Exception;import static sun.security.pkcs11.wrapper.PKCS11Constants.*; /** * KeyFactory base class. Provides common infrastructure for the RSA, DSA, * and DH implementations. * * The subclasses support conversion between keys and keyspecs * using X.509, PKCS#8, and their individual algorithm specific formats, * assuming keys are extractable. * * @author  Andreas Sterbenz * @since   1.5 */abstract class P11KeyFactory extends KeyFactorySpi {     // token instance    final Token token;     // algorithm name, currently one of RSA, DSA, DH    final String algorithm;     P11KeyFactory(Token token, String algorithm) {        super();        this.token = token;        this.algorithm = algorithm;    }     /**     * Convert an arbitrary key of algorithm into a P11Key of token.     * Used by P11Signature.init() and RSACipher.init().     */    static P11Key convertKey(Token token, Key key, String algorithm)            throws InvalidKeyException {        return (P11Key)token.getKeyFactory(algorithm).engineTranslateKey(key);    }     // see JCA spec    protected final <T extends KeySpec> T engineGetKeySpec(Key key, Class<T> keySpec)            throws InvalidKeySpecException {        token.ensureValid();        if ((key == null) || (keySpec == null)) {            throw new InvalidKeySpecException                ("key and keySpec must not be null");        }        // delegate to our Java based providers for PKCS#8 and X.509        if (PKCS8EncodedKeySpec.class.isAssignableFrom(keySpec)                || X509EncodedKeySpec.class.isAssignableFrom(keySpec)) {            try {                return (T)implGetSoftwareFactory().getKeySpec(key, keySpec);            } catch (GeneralSecurityException e) {                throw new InvalidKeySpecException("Could not encode key", e);            }        }        // first translate into a key of this token, if it is not already        P11Key p11Key;        try {            p11Key = (P11Key)engineTranslateKey(key);        } catch (InvalidKeyException e) {            throw new InvalidKeySpecException("Could not convert key", e);        }        Session[] session = new Session[1];        try {            if (p11Key.isPublic()) {                return (T)implGetPublicKeySpec(p11Key, keySpec, session);            } else {                return (T)implGetPrivateKeySpec(p11Key, keySpec, session);            }        } catch (PKCS11Exception e) {            throw new InvalidKeySpecException("Could not generate KeySpec", e);        } finally {            session[0] = token.releaseSession(session[0]);        }    }     // see JCA spec    protected final Key engineTranslateKey(Key key) throws InvalidKeyException {        token.ensureValid();        if (key == null) {            throw new InvalidKeyException("Key must not be null");        }        if (key.getAlgorithm().equals(this.algorithm) == false) {            throw new InvalidKeyException                ("Key algorithm must be " + algorithm);        }        if (key instanceof P11Key) {            P11Key p11Key = (P11Key)key;            if (p11Key.token == token) {                // already a key of this token, no need to translate                return key;            }        }        P11Key p11Key = token.privateCache.get(key);        if (p11Key != null) {            return p11Key;        }        if (key instanceof PublicKey) {            PublicKey publicKey = implTranslatePublicKey((PublicKey)key);            token.privateCache.put(key, (P11Key)publicKey);            return publicKey;        } else if (key instanceof PrivateKey) {            PrivateKey privateKey = implTranslatePrivateKey((PrivateKey)key);            token.privateCache.put(key, (P11Key)privateKey);            return privateKey;        } else {            throw new InvalidKeyException                ("Key must be instance of PublicKey or PrivateKey");        }    }     abstract KeySpec implGetPublicKeySpec(P11Key key, Class keySpec,            Session[] session) throws PKCS11Exception, InvalidKeySpecException;     abstract KeySpec implGetPrivateKeySpec(P11Key key, Class keySpec,            Session[] session) throws PKCS11Exception, InvalidKeySpecException;     abstract PublicKey implTranslatePublicKey(PublicKey key)            throws InvalidKeyException;     abstract PrivateKey implTranslatePrivateKey(PrivateKey key)            throws InvalidKeyException;     abstract KeyFactory implGetSoftwareFactory() throws GeneralSecurityException; }