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
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24 */
25
26package sun.security.pkcs11;
27
28import java.security.*;
29import java.security.spec.AlgorithmParameterSpec;
30
31import javax.crypto.*;
32import javax.crypto.spec.*;
33
34import sun.security.internal.spec.TlsRsaPremasterSecretParameterSpec;
35
36import static sun.security.pkcs11.TemplateManager.*;
37import sun.security.pkcs11.wrapper.*;
38import 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 */
46final 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}
138