1 /*
2 * Copyright (c) 2017, 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.ssl;
27
28 import java.security.*;
29 import java.math.BigInteger;
30 import java.util.regex.Pattern;
31 import java.util.regex.Matcher;
32 import java.util.Map;
33 import java.util.HashMap;
34 import java.util.Collections;
35 import javax.crypto.spec.DHParameterSpec;
36
37 /**
38 * Predefined default DH ephemeral parameters.
39 */
40 final class PredefinedDHParameterSpecs {
41 private final static boolean debugIsOn =
42 (Debug.getInstance("ssl") != null) && Debug.isOn("sslctx");
43
44 //
45 // Default DH ephemeral parameters
46 //
47 private static final BigInteger p512 = new BigInteger( // generated
48 "D87780E15FF50B4ABBE89870188B049406B5BEA98AB23A02" +
49 "41D88EA75B7755E669C08093D3F0CA7FC3A5A25CF067DCB9" +
50 "A43DD89D1D90921C6328884461E0B6D3", 16);
51 private static final BigInteger p768 = new BigInteger( // RFC 2409
52 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" +
53 "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" +
54 "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" +
55 "E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF", 16);
56
57 private static final BigInteger p1024 = new BigInteger( // RFC 2409
58 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" +
59 "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" +
60 "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" +
61 "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" +
62 "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381" +
192 "0B8CC3BDF64B10EF86B63142A3AB8829555B2F747C932665" +
193 "CB2C0F1CC01BD70229388839D2AF05E454504AC78B758282" +
194 "2846C0BA35C35F5C59160CC046FD8251541FC68C9C86B022" +
195 "BB7099876A460E7451A8A93109703FEE1C217E6C3826E52C" +
196 "51AA691E0E423CFC99E9E31650C1217B624816CDAD9A95F9" +
197 "D5B8019488D9C0A0A1FE3075A577E23183F81D4A3F2FA457" +
198 "1EFC8CE0BA8A4FE8B6855DFE72B0A66EDED2FBABFBE58A30" +
199 "FAFABE1C5D71A87E2F741EF8C1FE86FEA6BBFDE530677F0D" +
200 "97D11D49F7A8443D0822E506A9F4614E011E2A94838FF88C" +
201 "D68C8BB7C5C6424CFFFFFFFFFFFFFFFF", 16);
202
203 private static final BigInteger[] supportedPrimes = {
204 p512, p768, p1024, p1536, p2048, p3072, p4096, p6144, p8192};
205
206 private static final BigInteger[] ffdhePrimes = {
207 p2048, p3072, p4096, p6144, p8192};
208
209 // a measure of the uncertainty that prime modulus p is not a prime
210 //
211 // see BigInteger.isProbablePrime(int certainty)
212 private final static int PRIME_CERTAINTY = 120;
213
214 // the known security property, jdk.tls.server.defaultDHEParameters
215 private final static String PROPERTY_NAME =
216 "jdk.tls.server.defaultDHEParameters";
217
218 private static final Pattern spacesPattern = Pattern.compile("\\s+");
219
220 private final static Pattern syntaxPattern = Pattern.compile(
221 "(\\{[0-9A-Fa-f]+,[0-9A-Fa-f]+\\})" +
222 "(,\\{[0-9A-Fa-f]+,[0-9A-Fa-f]+\\})*");
223
224 private static final Pattern paramsPattern = Pattern.compile(
225 "\\{([0-9A-Fa-f]+),([0-9A-Fa-f]+)\\}");
226
227 // cache of predefined default DH ephemeral parameters
228 final static Map<Integer, DHParameterSpec> definedParams;
229
230 // cache of Finite Field DH Ephemeral parameters (RFC 7919/FFDHE)
231 final static Map<Integer, DHParameterSpec> ffdheParams;
232
233 static {
234 String property = AccessController.doPrivileged(
235 new PrivilegedAction<String>() {
236 public String run() {
237 return Security.getProperty(PROPERTY_NAME);
238 }
239 });
240
241 if (property != null && !property.isEmpty()) {
242 // remove double quote marks from beginning/end of the property
243 if (property.length() >= 2 && property.charAt(0) == '"' &&
244 property.charAt(property.length() - 1) == '"') {
245 property = property.substring(1, property.length() - 1);
246 }
247
248 property = property.trim();
249 }
250
251 if (property != null && !property.isEmpty()) {
252 Matcher spacesMatcher = spacesPattern.matcher(property);
253 property = spacesMatcher.replaceAll("");
254
255 if (debugIsOn) {
256 System.out.println("The Security Property " +
257 PROPERTY_NAME + ": " + property);
258 }
259 }
260
261 Map<Integer,DHParameterSpec> defaultParams = new HashMap<>();
262 if (property != null && !property.isEmpty()) {
263 Matcher syntaxMatcher = syntaxPattern.matcher(property);
264 if (syntaxMatcher.matches()) {
265 Matcher paramsFinder = paramsPattern.matcher(property);
266 while(paramsFinder.find()) {
267 String primeModulus = paramsFinder.group(1);
268 BigInteger p = new BigInteger(primeModulus, 16);
269 if (!p.isProbablePrime(PRIME_CERTAINTY)) {
270 if (debugIsOn) {
271 System.out.println(
272 "Prime modulus p in Security Property, " +
273 PROPERTY_NAME + ", is not a prime: " +
274 primeModulus);
275 }
276
277 continue;
278 }
279
280 String baseGenerator = paramsFinder.group(2);
281 BigInteger g = new BigInteger(baseGenerator, 16);
282
283 DHParameterSpec spec = new DHParameterSpec(p, g);
284 int primeLen = p.bitLength();
285 defaultParams.put(primeLen, spec);
286 }
287 } else if (debugIsOn) {
288 System.out.println("Invalid Security Property, " +
289 PROPERTY_NAME + ", definition");
290 }
291 }
292
293 Map<Integer,DHParameterSpec> tempFFDHEs = new HashMap<>();
294 for (BigInteger p : ffdhePrimes) {
295 int primeLen = p.bitLength();
296 DHParameterSpec dhps = new DHParameterSpec(p, BigInteger.TWO);
297 tempFFDHEs.put(primeLen, dhps);
298 defaultParams.putIfAbsent(primeLen, dhps);
299 }
300
301 for (BigInteger p : supportedPrimes) {
302 int primeLen = p.bitLength();
303 if (defaultParams.get(primeLen) == null) {
304 defaultParams.put(primeLen,
305 new DHParameterSpec(p, BigInteger.TWO));
306 }
307 }
308
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1 /*
2 * Copyright (c) 2018, 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.ssl;
27
28 import java.math.BigInteger;
29 import java.security.*;
30 import java.util.Collections;
31 import java.util.HashMap;
32 import java.util.Map;
33 import java.util.regex.Matcher;
34 import java.util.regex.Pattern;
35 import javax.crypto.spec.DHParameterSpec;
36
37 /**
38 * Predefined default DH ephemeral parameters.
39 */
40 final class PredefinedDHParameterSpecs {
41
42 //
43 // Default DH ephemeral parameters
44 //
45 private static final BigInteger p512 = new BigInteger( // generated
46 "D87780E15FF50B4ABBE89870188B049406B5BEA98AB23A02" +
47 "41D88EA75B7755E669C08093D3F0CA7FC3A5A25CF067DCB9" +
48 "A43DD89D1D90921C6328884461E0B6D3", 16);
49 private static final BigInteger p768 = new BigInteger( // RFC 2409
50 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" +
51 "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" +
52 "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" +
53 "E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF", 16);
54
55 private static final BigInteger p1024 = new BigInteger( // RFC 2409
56 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" +
57 "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" +
58 "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" +
59 "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" +
60 "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381" +
190 "0B8CC3BDF64B10EF86B63142A3AB8829555B2F747C932665" +
191 "CB2C0F1CC01BD70229388839D2AF05E454504AC78B758282" +
192 "2846C0BA35C35F5C59160CC046FD8251541FC68C9C86B022" +
193 "BB7099876A460E7451A8A93109703FEE1C217E6C3826E52C" +
194 "51AA691E0E423CFC99E9E31650C1217B624816CDAD9A95F9" +
195 "D5B8019488D9C0A0A1FE3075A577E23183F81D4A3F2FA457" +
196 "1EFC8CE0BA8A4FE8B6855DFE72B0A66EDED2FBABFBE58A30" +
197 "FAFABE1C5D71A87E2F741EF8C1FE86FEA6BBFDE530677F0D" +
198 "97D11D49F7A8443D0822E506A9F4614E011E2A94838FF88C" +
199 "D68C8BB7C5C6424CFFFFFFFFFFFFFFFF", 16);
200
201 private static final BigInteger[] supportedPrimes = {
202 p512, p768, p1024, p1536, p2048, p3072, p4096, p6144, p8192};
203
204 private static final BigInteger[] ffdhePrimes = {
205 p2048, p3072, p4096, p6144, p8192};
206
207 // a measure of the uncertainty that prime modulus p is not a prime
208 //
209 // see BigInteger.isProbablePrime(int certainty)
210 private static final int PRIME_CERTAINTY = 120;
211
212 // the known security property, jdk.tls.server.defaultDHEParameters
213 private static final String PROPERTY_NAME =
214 "jdk.tls.server.defaultDHEParameters";
215
216 private static final Pattern spacesPattern = Pattern.compile("\\s+");
217
218 private static final Pattern syntaxPattern = Pattern.compile(
219 "(\\{[0-9A-Fa-f]+,[0-9A-Fa-f]+\\})" +
220 "(,\\{[0-9A-Fa-f]+,[0-9A-Fa-f]+\\})*");
221
222 private static final Pattern paramsPattern = Pattern.compile(
223 "\\{([0-9A-Fa-f]+),([0-9A-Fa-f]+)\\}");
224
225 // cache of predefined default DH ephemeral parameters
226 static final Map<Integer, DHParameterSpec> definedParams;
227
228 // cache of Finite Field DH Ephemeral parameters (RFC 7919/FFDHE)
229 static final Map<Integer, DHParameterSpec> ffdheParams;
230
231 static {
232 String property = AccessController.doPrivileged(
233 new PrivilegedAction<String>() {
234 public String run() {
235 return Security.getProperty(PROPERTY_NAME);
236 }
237 });
238
239 if (property != null && !property.isEmpty()) {
240 // remove double quote marks from beginning/end of the property
241 if (property.length() >= 2 && property.charAt(0) == '"' &&
242 property.charAt(property.length() - 1) == '"') {
243 property = property.substring(1, property.length() - 1);
244 }
245
246 property = property.trim();
247 }
248
249 if (property != null && !property.isEmpty()) {
250 Matcher spacesMatcher = spacesPattern.matcher(property);
251 property = spacesMatcher.replaceAll("");
252
253 if (SSLLogger.isOn && SSLLogger.isOn("sslctx")) {
254 SSLLogger.fine(
255 "The Security Property " +
256 PROPERTY_NAME + ": " + property);
257 }
258 }
259
260 Map<Integer,DHParameterSpec> defaultParams = new HashMap<>();
261 if (property != null && !property.isEmpty()) {
262 Matcher syntaxMatcher = syntaxPattern.matcher(property);
263 if (syntaxMatcher.matches()) {
264 Matcher paramsFinder = paramsPattern.matcher(property);
265 while(paramsFinder.find()) {
266 String primeModulus = paramsFinder.group(1);
267 BigInteger p = new BigInteger(primeModulus, 16);
268 if (!p.isProbablePrime(PRIME_CERTAINTY)) {
269 if (SSLLogger.isOn && SSLLogger.isOn("sslctx")) {
270 SSLLogger.fine(
271 "Prime modulus p in Security Property, " +
272 PROPERTY_NAME + ", is not a prime: " +
273 primeModulus);
274 }
275
276 continue;
277 }
278
279 String baseGenerator = paramsFinder.group(2);
280 BigInteger g = new BigInteger(baseGenerator, 16);
281
282 DHParameterSpec spec = new DHParameterSpec(p, g);
283 int primeLen = p.bitLength();
284 defaultParams.put(primeLen, spec);
285 }
286 } else if (SSLLogger.isOn && SSLLogger.isOn("sslctx")) {
287 SSLLogger.fine("Invalid Security Property, " +
288 PROPERTY_NAME + ", definition");
289 }
290 }
291
292 Map<Integer,DHParameterSpec> tempFFDHEs = new HashMap<>();
293 for (BigInteger p : ffdhePrimes) {
294 int primeLen = p.bitLength();
295 DHParameterSpec dhps = new DHParameterSpec(p, BigInteger.TWO);
296 tempFFDHEs.put(primeLen, dhps);
297 defaultParams.putIfAbsent(primeLen, dhps);
298 }
299
300 for (BigInteger p : supportedPrimes) {
301 int primeLen = p.bitLength();
302 if (defaultParams.get(primeLen) == null) {
303 defaultParams.put(primeLen,
304 new DHParameterSpec(p, BigInteger.TWO));
305 }
306 }
307
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