1 /*
   2  * Copyright (c) 2005, 2016, 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     @SuppressWarnings("deprecation")
  61     private TlsRsaPremasterSecretParameterSpec spec;
  62 
  63     // whether SSLv3 is supported
  64     private final boolean supportSSLv3;
  65 
  66     P11TlsRsaPremasterSecretGenerator(Token token, String algorithm, long mechanism)
  67             throws PKCS11Exception {
  68         super();
  69         this.token = token;
  70         this.algorithm = algorithm;
  71         this.mechanism = mechanism;
  72 
  73         // Given the current lookup order specified in SunPKCS11.java,
  74         // if CKM_SSL3_PRE_MASTER_KEY_GEN is not used to construct this object,
  75         // it means that this mech is disabled or unsupported.
  76         this.supportSSLv3 = (mechanism == CKM_SSL3_PRE_MASTER_KEY_GEN);
  77     }
  78 
  79     protected void engineInit(SecureRandom random) {
  80         throw new InvalidParameterException(MSG);
  81     }
  82 
  83     @SuppressWarnings("deprecation")
  84     protected void engineInit(AlgorithmParameterSpec params,
  85             SecureRandom random) throws InvalidAlgorithmParameterException {
  86         if (!(params instanceof TlsRsaPremasterSecretParameterSpec)) {
  87             throw new InvalidAlgorithmParameterException(MSG);
  88         }
  89 
  90         TlsRsaPremasterSecretParameterSpec spec =
  91             (TlsRsaPremasterSecretParameterSpec) params;
  92 
  93         int version = (spec.getMajorVersion() << 8) | spec.getMinorVersion();
  94 
  95         if ((version == 0x0300 && !supportSSLv3) || (version < 0x0300) ||
  96             (version > 0x0302)) {
  97              throw new InvalidAlgorithmParameterException
  98                     ("Only" + (supportSSLv3? " SSL 3.0,": "") +
  99                      " TLS 1.0, and TLS 1.1 are supported (0x" +
 100                      Integer.toHexString(version) + ")");
 101         }
 102         this.spec = spec;
 103     }
 104 
 105     protected void engineInit(int keysize, SecureRandom random) {
 106         throw new InvalidParameterException(MSG);
 107     }
 108 
 109     // Only can be used in client side to generate TLS RSA premaster secret.
 110     protected SecretKey engineGenerateKey() {
 111         if (spec == null) {
 112             throw new IllegalStateException
 113                         ("TlsRsaPremasterSecretGenerator must be initialized");
 114         }
 115 
 116         CK_VERSION version = new CK_VERSION(
 117                         spec.getMajorVersion(), spec.getMinorVersion());
 118         Session session = null;
 119         try {
 120             session = token.getObjSession();
 121             CK_ATTRIBUTE[] attributes = token.getAttributes(
 122                     O_GENERATE, CKO_SECRET_KEY,
 123                     CKK_GENERIC_SECRET, new CK_ATTRIBUTE[0]);
 124             long keyID = token.p11.C_GenerateKey(session.id(),
 125                     new CK_MECHANISM(mechanism, version), attributes);
 126             SecretKey key = P11Key.secretKey(session,
 127                     keyID, "TlsRsaPremasterSecret", 48 << 3, attributes);
 128             return key;
 129         } catch (PKCS11Exception e) {
 130             throw new ProviderException(
 131                     "Could not generate premaster secret", e);
 132         } finally {
 133             token.releaseSession(session);
 134         }
 135     }
 136 
 137 }