1 /*
   2  * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.security.pkcs11;
  27 
  28 import java.security.*;
  29 import java.security.spec.AlgorithmParameterSpec;
  30 
  31 import javax.crypto.*;
  32 import javax.crypto.spec.*;
  33 
  34 import sun.security.internal.spec.TlsRsaPremasterSecretParameterSpec;
  35 
  36 import static sun.security.pkcs11.TemplateManager.*;
  37 import sun.security.pkcs11.wrapper.*;
  38 import static sun.security.pkcs11.wrapper.PKCS11Constants.*;
  39 
  40 /**
  41  * KeyGenerator for the SSL/TLS RSA premaster secret.
  42  *
  43  * @author  Andreas Sterbenz
  44  * @since   1.6
  45  */
  46 final class P11TlsRsaPremasterSecretGenerator extends KeyGeneratorSpi {
  47 
  48     private final static String MSG = "TlsRsaPremasterSecretGenerator must be "
  49         + "initialized using a TlsRsaPremasterSecretParameterSpec";
  50 
  51     // token instance
  52     private final Token token;
  53 
  54     // algorithm name
  55     private final String algorithm;
  56 
  57     // mechanism id
  58     private long mechanism;
  59 
  60     private TlsRsaPremasterSecretParameterSpec spec;
  61 
  62     P11TlsRsaPremasterSecretGenerator(Token token, String algorithm, long mechanism)
  63             throws PKCS11Exception {
  64         super();
  65         this.token = token;
  66         this.algorithm = algorithm;
  67         this.mechanism = mechanism;
  68     }
  69 
  70     protected void engineInit(SecureRandom random) {
  71         throw new InvalidParameterException(MSG);
  72     }
  73 
  74     protected void engineInit(AlgorithmParameterSpec params,
  75             SecureRandom random) throws InvalidAlgorithmParameterException {
  76         if (!(params instanceof TlsRsaPremasterSecretParameterSpec)) {
  77             throw new InvalidAlgorithmParameterException(MSG);
  78         }
  79         this.spec = (TlsRsaPremasterSecretParameterSpec)params;
  80     }
  81 
  82     protected void engineInit(int keysize, SecureRandom random) {
  83         throw new InvalidParameterException(MSG);
  84     }
  85 
  86     // Only can be used in client side to generate TLS RSA premaster secret.
  87     protected SecretKey engineGenerateKey() {
  88         if (spec == null) {
  89             throw new IllegalStateException
  90                         ("TlsRsaPremasterSecretGenerator must be initialized");
  91         }
  92 
  93         CK_VERSION version = new CK_VERSION(
  94                         spec.getMajorVersion(), spec.getMinorVersion());
  95         Session session = null;
  96         try {
  97             session = token.getObjSession();
  98             CK_ATTRIBUTE[] attributes = token.getAttributes(
  99                     O_GENERATE, CKO_SECRET_KEY,
 100                     CKK_GENERIC_SECRET, new CK_ATTRIBUTE[0]);
 101             long keyID = token.p11.C_GenerateKey(session.id(),
 102                     new CK_MECHANISM(mechanism, version), attributes);
 103             SecretKey key = P11Key.secretKey(session,
 104                     keyID, "TlsRsaPremasterSecret", 48 << 3, attributes);
 105             return key;
 106         } catch (PKCS11Exception e) {
 107             throw new ProviderException(
 108                     "Could not generate premaster secret", e);
 109         } finally {
 110             token.releaseSession(session);
 111         }
 112     }
 113 
 114 }