OpenSSLEngine.java revision 796b0d2f4508e3933e53df2d372090c8634164ee 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package org.apache.harmony.xnet.provider.jsse;
18
19import java.security.InvalidKeyException;
20import java.security.PrivateKey;
21
22public class OpenSSLEngine {
23    static {
24        NativeCrypto.ENGINE_load_dynamic();
25    }
26
27    private static final Object mLoadingLock = new Object();
28
29    /** The ENGINE's native handle. */
30    private final int ctx;
31
32    public static OpenSSLEngine getInstance(String engine) throws IllegalArgumentException {
33        if (engine == null) {
34            throw new NullPointerException("engine == null");
35        }
36
37        final int engineCtx;
38        synchronized (mLoadingLock) {
39            engineCtx = NativeCrypto.ENGINE_by_id(engine);
40            if (engineCtx == 0) {
41                throw new IllegalArgumentException("Unknown ENGINE id: " + engine);
42            }
43
44            NativeCrypto.ENGINE_add(engineCtx);
45        }
46
47        return new OpenSSLEngine(engineCtx);
48    }
49
50    private OpenSSLEngine(int engineCtx) {
51        ctx = engineCtx;
52
53        if (NativeCrypto.ENGINE_init(engineCtx) == 0) {
54            NativeCrypto.ENGINE_free(engineCtx);
55            throw new IllegalArgumentException("Could not initialize engine");
56        }
57    }
58
59    public PrivateKey getPrivateKeyById(String id) throws InvalidKeyException {
60        if (id == null) {
61            throw new NullPointerException("id == null");
62        }
63
64        final int keyRef = NativeCrypto.ENGINE_load_private_key(ctx, id);
65        if (keyRef == 0) {
66            return null;
67        }
68
69        final int keyType = NativeCrypto.EVP_PKEY_type(keyRef);
70        switch (keyType) {
71            case NativeCrypto.EVP_PKEY_RSA:
72                return OpenSSLRSAPrivateKey.getInstance(new OpenSSLKey(keyRef, this, id));
73            case NativeCrypto.EVP_PKEY_DSA:
74                return new OpenSSLDSAPrivateKey(new OpenSSLKey(keyRef, this, id));
75            default:
76                throw new InvalidKeyException("Unknown key type: " + keyType);
77        }
78    }
79
80    int getEngineContext() {
81        return ctx;
82    }
83
84    @Override
85    protected void finalize() throws Throwable {
86        try {
87            NativeCrypto.ENGINE_finish(ctx);
88            NativeCrypto.ENGINE_free(ctx);
89        } finally {
90            super.finalize();
91        }
92    }
93
94    @Override
95    public boolean equals(Object o) {
96        if (o == this) {
97            return true;
98        }
99
100        if (!(o instanceof OpenSSLEngine)) {
101            return false;
102        }
103
104        OpenSSLEngine other = (OpenSSLEngine) o;
105
106        return other.getEngineContext() == ctx;
107    }
108
109    @Override
110    public int hashCode() {
111        return ctx;
112    }
113}
114