Java example source code file (P11TlsRsaPremasterSecretGenerator.java)

This example Java source code file (P11TlsRsaPremasterSecretGenerator.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

ck_attribute, ck_version, crypto, illegalstateexception, invalidalgorithmparameterexception, invalidparameterexception, o_generate, p11tlsrsapremastersecretgenerator, pkcs11exception, providerexception, secretkey, securerandom, security, string, tlsrsapremastersecretgenerator, tlsrsapremastersecretparameterspec

The P11TlsRsaPremasterSecretGenerator.java Java example source code

/*
 * Copyright (c) 2005, 2013, 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.AlgorithmParameterSpec;

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

import sun.security.internal.spec.TlsRsaPremasterSecretParameterSpec;

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

/**
 * KeyGenerator for the SSL/TLS RSA premaster secret.
 *
 * @author  Andreas Sterbenz
 * @since   1.6
 */
final class P11TlsRsaPremasterSecretGenerator extends KeyGeneratorSpi {

    private final static String MSG = "TlsRsaPremasterSecretGenerator must be "
        + "initialized using a TlsRsaPremasterSecretParameterSpec";

    // token instance
    private final Token token;

    // algorithm name
    private final String algorithm;

    // mechanism id
    private long mechanism;

    private TlsRsaPremasterSecretParameterSpec spec;

    P11TlsRsaPremasterSecretGenerator(Token token, String algorithm, long mechanism)
            throws PKCS11Exception {
        super();
        this.token = token;
        this.algorithm = algorithm;
        this.mechanism = mechanism;
    }

    protected void engineInit(SecureRandom random) {
        throw new InvalidParameterException(MSG);
    }

    protected void engineInit(AlgorithmParameterSpec params,
            SecureRandom random) throws InvalidAlgorithmParameterException {
        if (params instanceof TlsRsaPremasterSecretParameterSpec == false) {
            throw new InvalidAlgorithmParameterException(MSG);
        }
        this.spec = (TlsRsaPremasterSecretParameterSpec)params;
    }

    protected void engineInit(int keysize, SecureRandom random) {
        throw new InvalidParameterException(MSG);
    }

    protected SecretKey engineGenerateKey() {
        if (spec == null) {
            throw new IllegalStateException
                        ("TlsRsaPremasterSecretGenerator must be initialized");
        }

        byte[] b = spec.getEncodedSecret();
        if (b == null) {
            CK_VERSION version = new CK_VERSION(
                        spec.getMajorVersion(), spec.getMinorVersion());
            Session session = null;
            try {
                session = token.getObjSession();
                CK_ATTRIBUTE[] attributes = token.getAttributes(
                        O_GENERATE, CKO_SECRET_KEY,
                        CKK_GENERIC_SECRET, new CK_ATTRIBUTE[0]);
                long keyID = token.p11.C_GenerateKey(session.id(),
                        new CK_MECHANISM(mechanism, version), attributes);
                SecretKey key = P11Key.secretKey(session,
                        keyID, "TlsRsaPremasterSecret", 48 << 3, attributes);
                return key;
            } catch (PKCS11Exception e) {
                throw new ProviderException(
                        "Could not generate premaster secret", e);
            } finally {
                token.releaseSession(session);
            }
        }

        // Won't worry, the TlsRsaPremasterSecret will be soon converted to
        // TlsMasterSecret.
        return new SecretKeySpec(b, "TlsRsaPremasterSecret");
    }

}