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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 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.provider; | ||
| 27 | |||
| 28 | import java.util.*; | ||
| 29 | import java.math.BigInteger; | ||
| 30 | |||
| 31 | import java.security.*; | ||
| 32 | import java.security.SecureRandom; | ||
| 33 | import java.security.spec.*; | ||
| 34 | |||
| 35 | import javax.crypto.spec.DHParameterSpec; | ||
| 36 | |||
| 37 | /** | ||
| 38 | * Cache for DSA and DH parameter specs. Used by the KeyPairGenerators | ||
| 39 | * in the Sun, SunJCE, and SunPKCS11 provider if no parameters have been | ||
| 40 | * explicitly specified by the application. | ||
| 41 | * | ||
| 42 | * @author Andreas Sterbenz | ||
| 43 | * @since 1.5 | ||
| 44 | */ | ||
| 45 | public final class ParameterCache { | ||
| 46 | |||
| 47 | private ParameterCache() { | ||
| 48 | // empty | ||
| 49 | } | ||
| 50 | |||
| 51 | // cache of DSA parameters | ||
| 52 | private final static Map<Integer,DSAParameterSpec> dsaCache; | ||
| 53 | |||
| 54 | // cache of DH parameters | ||
| 55 | private final static Map<Integer,DHParameterSpec> dhCache; | ||
| 56 | |||
| 57 | /** | ||
| 58 | * Return cached DSA parameters for the given keylength, or null if none | ||
| 59 | * are available in the cache. | ||
| 60 | */ | ||
| 61 | public static DSAParameterSpec getCachedDSAParameterSpec(int keyLength) { | ||
| 62 | return dsaCache.get(Integer.valueOf(keyLength)); | ||
| 63 | } | ||
| 64 | |||
| 65 | /** | ||
| 66 | * Return cached DH parameters for the given keylength, or null if none | ||
| 67 | * are available in the cache. | ||
| 68 | */ | ||
| 69 | public static DHParameterSpec getCachedDHParameterSpec(int keyLength) { | ||
| 70 | return dhCache.get(Integer.valueOf(keyLength)); | ||
| 71 | } | ||
| 72 | |||
| 73 | /** | ||
| 74 | * Return DSA parameters for the given keylength. Uses cache if possible, | ||
| 75 | * generates new parameters and adds them to the cache otherwise. | ||
| 76 | */ | ||
| 77 | public static DSAParameterSpec getDSAParameterSpec(int keyLength, | ||
| 78 | SecureRandom random) | ||
| 79 | throws NoSuchAlgorithmException, InvalidParameterSpecException { | ||
| 80 | DSAParameterSpec spec = getCachedDSAParameterSpec(keyLength); | ||
| 81 | if (spec != null) { | ||
| 82 | return spec; | ||
| 83 | } | ||
| 84 | spec = getNewDSAParameterSpec(keyLength, random); | ||
| 85 | dsaCache.put(Integer.valueOf(keyLength), spec); | ||
| 86 | return spec; | ||
| 87 | } | ||
| 88 | |||
| 89 | /** | ||
| 90 | * Return DH parameters for the given keylength. Uses cache if possible, | ||
| 91 | * generates new parameters and adds them to the cache otherwise. | ||
| 92 | */ | ||
| 93 | public static DHParameterSpec getDHParameterSpec(int keyLength, | ||
| 94 | SecureRandom random) | ||
| 95 | throws NoSuchAlgorithmException, InvalidParameterSpecException { | ||
| 96 | DHParameterSpec spec = getCachedDHParameterSpec(keyLength); | ||
| 97 | if (spec != null) { | ||
| 98 | return spec; | ||
| 99 | } | ||
| 100 | AlgorithmParameterGenerator gen = | ||
| 101 | AlgorithmParameterGenerator.getInstance("DH"); | ||
| 102 | gen.init(keyLength, random); | ||
| 103 | AlgorithmParameters params = gen.generateParameters(); | ||
| 104 | spec = params.getParameterSpec(DHParameterSpec.class); | ||
| 105 | dhCache.put(Integer.valueOf(keyLength), spec); | ||
| 106 | return spec; | ||
| 107 | } | ||
| 108 | |||
| 109 | /** | ||
| 110 | * Return new DSA parameters for the given keylength. Do not lookup in | ||
| 111 | * cache and do not cache the newly generated parameters. This method | ||
| 112 | * really only exists for the legacy method | ||
| 113 | * DSAKeyPairGenerator.initialize(int, boolean, SecureRandom). | ||
| 114 | */ | ||
| 115 | public static DSAParameterSpec getNewDSAParameterSpec(int keyLength, | ||
| 116 | SecureRandom random) | ||
| 117 | throws NoSuchAlgorithmException, InvalidParameterSpecException { | ||
| 118 | AlgorithmParameterGenerator gen = | ||
| 119 | AlgorithmParameterGenerator.getInstance("DSA"); | ||
| 120 | gen.init(keyLength, random); | ||
| 121 | AlgorithmParameters params = gen.generateParameters(); | ||
| 122 | DSAParameterSpec spec = params.getParameterSpec(DSAParameterSpec.class); | ||
| 123 | return spec; | ||
| 124 | } | ||
| 125 | |||
| 126 | static { | ||
| 127 | // XXX change to ConcurrentHashMap once available | ||
| 128 | dhCache = Collections.synchronizedMap | ||
| 129 | (new HashMap<Integer,DHParameterSpec>()); | ||
| 130 | dsaCache = Collections.synchronizedMap | ||
| 131 | (new HashMap<Integer,DSAParameterSpec>()); | ||
| 132 | |||
| 133 | /* | ||
| 134 | * We support precomputed parameter for 512, 768 and 1024 bit | ||
| 135 | * moduli. In this file we provide both the seed and counter | ||
| 136 | * value of the generation process for each of these seeds, | ||
| 137 | * for validation purposes. We also include the test vectors | ||
| 138 | * from the DSA specification, FIPS 186, and the FIPS 186 | ||
| 139 | * Change No 1, which updates the test vector using SHA-1 | ||
| 140 | * instead of SHA (for both the G function and the message | ||
| 141 | * hash. | ||
| 142 | */ | ||
| 143 | |||
| 144 | /* | ||
| 145 | * L = 512 | ||
| 146 | * SEED = b869c82b35d70e1b1ff91b28e37a62ecdc34409b | ||
| 147 | * counter = 123 | ||
| 148 | */ | ||
| 149 | BigInteger p512 = | ||
| 150 | new BigInteger("fca682ce8e12caba26efccf7110e526db078b05edecb" + | ||
| 151 | "cd1eb4a208f3ae1617ae01f35b91a47e6df63413c5e1" + | ||
| 152 | "2ed0899bcd132acd50d99151bdc43ee737592e17", 16); | ||
| 153 | |||
| 154 | BigInteger q512 = | ||
| 155 | new BigInteger("962eddcc369cba8ebb260ee6b6a126d9346e38c5", 16); | ||
| 156 | |||
| 157 | BigInteger g512 = | ||
| 158 | new BigInteger("678471b27a9cf44ee91a49c5147db1a9aaf244f05a43" + | ||
| 159 | "4d6486931d2d14271b9e35030b71fd73da179069b32e" + | ||
| 160 | "2935630e1c2062354d0da20a6c416e50be794ca4", 16); | ||
| 161 | |||
| 162 | /* | ||
| 163 | * L = 768 | ||
| 164 | * SEED = 77d0f8c4dad15eb8c4f2f8d6726cefd96d5bb399 | ||
| 165 | * counter = 263 | ||
| 166 | */ | ||
| 167 | BigInteger p768 = | ||
| 168 | new BigInteger("e9e642599d355f37c97ffd3567120b8e25c9cd43e" + | ||
| 169 | "927b3a9670fbec5d890141922d2c3b3ad24800937" + | ||
| 170 | "99869d1e846aab49fab0ad26d2ce6a22219d470bc" + | ||
| 171 | "e7d777d4a21fbe9c270b57f607002f3cef8393694" + | ||
| 172 | "cf45ee3688c11a8c56ab127a3daf", 16); | ||
| 173 | |||
| 174 | BigInteger q768 = | ||
| 175 | new BigInteger("9cdbd84c9f1ac2f38d0f80f42ab952e7338bf511", | ||
| 176 | 16); | ||
| 177 | |||
| 178 | BigInteger g768 = | ||
| 179 | new BigInteger("30470ad5a005fb14ce2d9dcd87e38bc7d1b1c5fac" + | ||
| 180 | "baecbe95f190aa7a31d23c4dbbcbe06174544401a" + | ||
| 181 | "5b2c020965d8c2bd2171d3668445771f74ba084d2" + | ||
| 182 | "029d83c1c158547f3a9f1a2715be23d51ae4d3e5a" + | ||
| 183 | "1f6a7064f316933a346d3f529252", 16); | ||
| 184 | |||
| 185 | |||
| 186 | /* | ||
| 187 | * L = 1024 | ||
| 188 | * SEED = 8d5155894229d5e689ee01e6018a237e2cae64cd | ||
| 189 | * counter = 92 | ||
| 190 | */ | ||
| 191 | BigInteger p1024 = | ||
| 192 | new BigInteger("fd7f53811d75122952df4a9c2eece4e7f611b7523c" + | ||
| 193 | "ef4400c31e3f80b6512669455d402251fb593d8d58" + | ||
| 194 | "fabfc5f5ba30f6cb9b556cd7813b801d346ff26660" + | ||
| 195 | "b76b9950a5a49f9fe8047b1022c24fbba9d7feb7c6" + | ||
| 196 | "1bf83b57e7c6a8a6150f04fb83f6d3c51ec3023554" + | ||
| 197 | "135a169132f675f3ae2b61d72aeff22203199dd148" + | ||
| 198 | "01c7", 16); | ||
| 199 | |||
| 200 | BigInteger q1024 = | ||
| 201 | new BigInteger("9760508f15230bccb292b982a2eb840bf0581cf5", | ||
| 202 | 16); | ||
| 203 | |||
| 204 | BigInteger g1024 = | ||
| 205 | new BigInteger("f7e1a085d69b3ddecbbcab5c36b857b97994afbbfa" + | ||
| 206 | "3aea82f9574c0b3d0782675159578ebad4594fe671" + | ||
| 207 | "07108180b449167123e84c281613b7cf09328cc8a6" + | ||
| 208 | "e13c167a8b547c8d28e0a3ae1e2bb3a675916ea37f" + | ||
| 209 | "0bfa213562f1fb627a01243bcca4f1bea8519089a8" + | ||
| 210 | "83dfe15ae59f06928b665e807b552564014c3bfecf" + | ||
| 211 | "492a", 16); | ||
| 212 | |||
| 213 | dsaCache.put(Integer.valueOf(512), | ||
| 214 | new DSAParameterSpec(p512, q512, g512)); | ||
| 215 | dsaCache.put(Integer.valueOf(768), | ||
| 216 | new DSAParameterSpec(p768, q768, g768)); | ||
| 217 | dsaCache.put(Integer.valueOf(1024), | ||
| 218 | new DSAParameterSpec(p1024, q1024, g1024)); | ||
| 219 | |||
| 220 | // use DSA parameters for DH as well | ||
| 221 | dhCache.put(Integer.valueOf(512), new DHParameterSpec(p512, g512)); | ||
| 222 | dhCache.put(Integer.valueOf(768), new DHParameterSpec(p768, g768)); | ||
| 223 | dhCache.put(Integer.valueOf(1024), new DHParameterSpec(p1024, g1024)); | ||
| 224 | } | ||
| 225 | |||
| 226 | } | ||