jdk/src/java.base/share/classes/sun/security/provider/ParameterCache.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 package sun.security.provider;

 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 import java.math.BigInteger;

 import java.security.*;
 import java.security.SecureRandom;
 import java.security.spec.*;

 import javax.crypto.spec.DHParameterSpec;

 /**
  * Cache for DSA and DH parameter specs. Used by the KeyPairGenerators
  * in the Sun, SunJCE, and SunPKCS11 provider if no parameters have been
  * explicitly specified by the application.
  *
  * @author  Andreas Sterbenz
  * @since   1.5
  */
 public final class ParameterCache {

     private ParameterCache() {
         // empty
     }

     // cache of DSA parameters
     private static final Map<Integer,DSAParameterSpec> dsaCache;

     // cache of DH parameters
     private static final Map<Integer,DHParameterSpec> dhCache;

     /**
      * Return cached DSA parameters for the given length combination of
      * prime and subprime, or null if none are available in the cache.
      */
     public static DSAParameterSpec getCachedDSAParameterSpec(int primeLen,
             int subprimeLen) {
         // ensure the sum is unique in all cases, i.e.
         // case#1: (512 <= p <= 1024) AND q=160
         // case#2: p=2048 AND q=224
         // case#3: p=2048 AND q=256
         // (NOT-YET-SUPPORTED)case#4: p=3072 AND q=256
         return dsaCache.get(Integer.valueOf(primeLen+subprimeLen));
     }

     /**
      * Return cached DH parameters for the given keylength, or null if none
      * are available in the cache.
      */
     public static DHParameterSpec getCachedDHParameterSpec(int keyLength) {
         return dhCache.get(Integer.valueOf(keyLength));
     }

     /**
      * Return DSA parameters for the given primeLen. Uses cache if
      * possible, generates new parameters and adds them to the cache
      * otherwise.
      */
     public static DSAParameterSpec getDSAParameterSpec(int primeLen,
             SecureRandom random)
             throws NoSuchAlgorithmException, InvalidParameterSpecException,
                    InvalidAlgorithmParameterException {
         if (primeLen <= 1024) {
             return getDSAParameterSpec(primeLen, 160, random);
         } else if (primeLen == 2048) {
             return getDSAParameterSpec(primeLen, 224, random);
         } else {
             return null;
         }
     }

     /**
      * Return DSA parameters for the given primeLen and subprimeLen.
      * Uses cache if possible, generates new parameters and adds them to the
      * cache otherwise.
      */
     public static DSAParameterSpec getDSAParameterSpec(int primeLen,
             int subprimeLen, SecureRandom random)
             throws NoSuchAlgorithmException, InvalidParameterSpecException,
                    InvalidAlgorithmParameterException {
         DSAParameterSpec spec =
             getCachedDSAParameterSpec(primeLen, subprimeLen);
         if (spec != null) {
             return spec;
         }
         spec = getNewDSAParameterSpec(primeLen, subprimeLen, random);
         dsaCache.put(Integer.valueOf(primeLen + subprimeLen), spec);
         return spec;
     }

     /**
      * Return DH parameters for the given keylength. Uses cache if possible,
      * generates new parameters and adds them to the cache otherwise.
      */
     public static DHParameterSpec getDHParameterSpec(int keyLength,
             SecureRandom random)
             throws NoSuchAlgorithmException, InvalidParameterSpecException {
         DHParameterSpec spec = getCachedDHParameterSpec(keyLength);
         if (spec != null) {
             return spec;
         }
         AlgorithmParameterGenerator gen =
                 AlgorithmParameterGenerator.getInstance("DH");
         gen.init(keyLength, random);
         AlgorithmParameters params = gen.generateParameters();
         spec = params.getParameterSpec(DHParameterSpec.class);
         dhCache.put(Integer.valueOf(keyLength), spec);
         return spec;
     }

     /**
      * Return new DSA parameters for the given length combination of prime and
      * sub prime. Do not lookup in cache and do not cache the newly generated
      * parameters. This method really only exists for the legacy method
      * DSAKeyPairGenerator.initialize(int, boolean, SecureRandom).
      */
     public static DSAParameterSpec getNewDSAParameterSpec(int primeLen,
             int subprimeLen, SecureRandom random)
             throws NoSuchAlgorithmException, InvalidParameterSpecException,
                    InvalidAlgorithmParameterException {
         AlgorithmParameterGenerator gen =
                 AlgorithmParameterGenerator.getInstance("DSA");
         // Use init(int size, SecureRandom random) for legacy DSA key sizes
         if (primeLen < 1024) {
             gen.init(primeLen, random);
         } else {
             DSAGenParameterSpec genParams =
                 new DSAGenParameterSpec(primeLen, subprimeLen);
             gen.init(genParams, random);
         }
         AlgorithmParameters params = gen.generateParameters();
         DSAParameterSpec spec = params.getParameterSpec(DSAParameterSpec.class);
         return spec;
     }

     static {
         dhCache = new ConcurrentHashMap<Integer,DHParameterSpec>();
         dsaCache = new ConcurrentHashMap<Integer,DSAParameterSpec>();

         /*
          * We support precomputed parameter for legacy 512, 768 bit moduli,
          * and (L, N) combinations of (1024, 160), (2048, 224), (2048, 256).
          * In this file we provide both the seed and counter
          * value of the generation process for each of these seeds,
          * for validation purposes. We also include the test vectors
          * from the DSA specification, FIPS 186, and the FIPS 186
          * Change No 1, which updates the test vector using SHA-1
          * instead of SHA (for both the G function and the message
          * hash.
          */

         /*
          * L = 512
          * SEED = b869c82b35d70e1b1ff91b28e37a62ecdc34409b
          * counter = 123
          */
         BigInteger p512 =
             new BigInteger("fca682ce8e12caba26efccf7110e526db078b05edecb" +
                            "cd1eb4a208f3ae1617ae01f35b91a47e6df63413c5e1" +
                            "2ed0899bcd132acd50d99151bdc43ee737592e17", 16);

         BigInteger q512 =
             new BigInteger("962eddcc369cba8ebb260ee6b6a126d9346e38c5", 16);

         BigInteger g512 =
             new BigInteger("678471b27a9cf44ee91a49c5147db1a9aaf244f05a43" +
                            "4d6486931d2d14271b9e35030b71fd73da179069b32e" +
                            "2935630e1c2062354d0da20a6c416e50be794ca4", 16);

         /*
          * L = 768
          * SEED = 77d0f8c4dad15eb8c4f2f8d6726cefd96d5bb399
          * counter = 263
          */
         BigInteger p768 =
             new BigInteger("e9e642599d355f37c97ffd3567120b8e25c9cd43e" +
                            "927b3a9670fbec5d890141922d2c3b3ad24800937" +
                            "99869d1e846aab49fab0ad26d2ce6a22219d470bc" +
                            "e7d777d4a21fbe9c270b57f607002f3cef8393694" +
                            "cf45ee3688c11a8c56ab127a3daf", 16);

         BigInteger q768 =
             new BigInteger("9cdbd84c9f1ac2f38d0f80f42ab952e7338bf511",
                            16);

         BigInteger g768 =
             new BigInteger("30470ad5a005fb14ce2d9dcd87e38bc7d1b1c5fac" +
                            "baecbe95f190aa7a31d23c4dbbcbe06174544401a" +
                            "5b2c020965d8c2bd2171d3668445771f74ba084d2" +
                            "029d83c1c158547f3a9f1a2715be23d51ae4d3e5a" +
                            "1f6a7064f316933a346d3f529252", 16);


         /*
          * L = 1024
          * SEED = 8d5155894229d5e689ee01e6018a237e2cae64cd
          * counter = 92
          */
         BigInteger p1024 =
             new BigInteger("fd7f53811d75122952df4a9c2eece4e7f611b7523c" +
                            "ef4400c31e3f80b6512669455d402251fb593d8d58" +
                            "fabfc5f5ba30f6cb9b556cd7813b801d346ff26660" +
                            "b76b9950a5a49f9fe8047b1022c24fbba9d7feb7c6" +
                            "1bf83b57e7c6a8a6150f04fb83f6d3c51ec3023554" +
                            "135a169132f675f3ae2b61d72aeff22203199dd148" +
                            "01c7", 16);

         BigInteger q1024 =
             new BigInteger("9760508f15230bccb292b982a2eb840bf0581cf5",
                            16);

         BigInteger g1024 =
             new BigInteger("f7e1a085d69b3ddecbbcab5c36b857b97994afbbfa" +
                            "3aea82f9574c0b3d0782675159578ebad4594fe671" +
                            "07108180b449167123e84c281613b7cf09328cc8a6" +
                            "e13c167a8b547c8d28e0a3ae1e2bb3a675916ea37f" +
                            "0bfa213562f1fb627a01243bcca4f1bea8519089a8" +
                            "83dfe15ae59f06928b665e807b552564014c3bfecf" +
                            "492a", 16);

         dsaCache.put(Integer.valueOf(512+160),
                                 new DSAParameterSpec(p512, q512, g512));
         dsaCache.put(Integer.valueOf(768+160),
                                 new DSAParameterSpec(p768, q768, g768));
         dsaCache.put(Integer.valueOf(1024+160),
                                 new DSAParameterSpec(p1024, q1024, g1024));
         /*
          * L = 2048, N = 224
          * SEED = 584236080cfa43c09b02354135f4cc5198a19efada08bd866d601ba4
          * counter = 2666
          */
         BigInteger p2048_224 =
             new BigInteger("8f7935d9b9aae9bfabed887acf4951b6f32ec59e3b" +
                            "af3718e8eac4961f3efd3606e74351a9c4183339b8" +
                            "09e7c2ae1c539ba7475b85d011adb8b47987754984" +
                            "695cac0e8f14b3360828a22ffa27110a3d62a99345" +
                            "3409a0fe696c4658f84bdd20819c3709a01057b195" +
                            "adcd00233dba5484b6291f9d648ef883448677979c" +
                            "ec04b434a6ac2e75e9985de23db0292fc1118c9ffa" +
                            "9d8181e7338db792b730d7b9e349592f6809987215" +
                            "3915ea3d6b8b4653c633458f803b32a4c2e0f27290" +
                            "256e4e3f8a3b0838a1c450e4e18c1a29a37ddf5ea1" +
                            "43de4b66ff04903ed5cf1623e158d487c608e97f21" +
                            "1cd81dca23cb6e380765f822e342be484c05763939" +
                            "601cd667", 16);

         BigInteger q2048_224 =
             new BigInteger("baf696a68578f7dfdee7fa67c977c785ef32b233ba" +
                            "e580c0bcd5695d", 16);

         BigInteger g2048_224 =
             new BigInteger("16a65c58204850704e7502a39757040d34da3a3478" +
                            "c154d4e4a5c02d242ee04f96e61e4bd0904abdac8f" +
                            "37eeb1e09f3182d23c9043cb642f88004160edf9ca" +
                            "09b32076a79c32a627f2473e91879ba2c4e744bd20" +
                            "81544cb55b802c368d1fa83ed489e94e0fa0688e32" +
                            "428a5c78c478c68d0527b71c9a3abb0b0be12c4468" +
                            "9639e7d3ce74db101a65aa2b87f64c6826db3ec72f" +
                            "4b5599834bb4edb02f7c90e9a496d3a55d535bebfc" +
                            "45d4f619f63f3dedbb873925c2f224e07731296da8" +
                            "87ec1e4748f87efb5fdeb75484316b2232dee553dd" +
                            "af02112b0d1f02da30973224fe27aeda8b9d4b2922" +
                            "d9ba8be39ed9e103a63c52810bc688b7e2ed4316e1" +
                            "ef17dbde", 16);
         dsaCache.put(Integer.valueOf(2048+224),
                      new DSAParameterSpec(p2048_224, q2048_224, g2048_224));

         /*
          * L = 2048, N = 256
          * SEED = b0b4417601b59cbc9d8ac8f935cadaec4f5fbb2f23785609ae466748d9b5a536
          * counter = 497
          */
         BigInteger p2048_256 =
             new BigInteger("95475cf5d93e596c3fcd1d902add02f427f5f3c721" +
                            "0313bb45fb4d5bb2e5fe1cbd678cd4bbdd84c9836b" +
                            "e1f31c0777725aeb6c2fc38b85f48076fa76bcd814" +
                            "6cc89a6fb2f706dd719898c2083dc8d896f84062e2" +
                            "c9c94d137b054a8d8096adb8d51952398eeca852a0" +
                            "af12df83e475aa65d4ec0c38a9560d5661186ff98b" +
                            "9fc9eb60eee8b030376b236bc73be3acdbd74fd61c" +
                            "1d2475fa3077b8f080467881ff7e1ca56fee066d79" +
                            "506ade51edbb5443a563927dbc4ba520086746175c" +
                            "8885925ebc64c6147906773496990cb714ec667304" +
                            "e261faee33b3cbdf008e0c3fa90650d97d3909c927" +
                            "5bf4ac86ffcb3d03e6dfc8ada5934242dd6d3bcca2" +
                            "a406cb0b", 16);

         BigInteger q2048_256 =
             new BigInteger("f8183668ba5fc5bb06b5981e6d8b795d30b8978d43" +
                            "ca0ec572e37e09939a9773", 16);

         BigInteger g2048_256 =
             new BigInteger("42debb9da5b3d88cc956e08787ec3f3a09bba5f48b" +
                            "889a74aaf53174aa0fbe7e3c5b8fcd7a53bef563b0" +
                            "e98560328960a9517f4014d3325fc7962bf1e04937" +
                            "0d76d1314a76137e792f3f0db859d095e4a5b93202" +
                            "4f079ecf2ef09c797452b0770e1350782ed57ddf79" +
                            "4979dcef23cb96f183061965c4ebc93c9c71c56b92" +
                            "5955a75f94cccf1449ac43d586d0beee43251b0b22" +
                            "87349d68de0d144403f13e802f4146d882e057af19" +
                            "b6f6275c6676c8fa0e3ca2713a3257fd1b27d0639f" +
                            "695e347d8d1cf9ac819a26ca9b04cb0eb9b7b03598" +
                            "8d15bbac65212a55239cfc7e58fae38d7250ab9991" +
                            "ffbc97134025fe8ce04c4399ad96569be91a546f49" +
                            "78693c7a", 16);
         dsaCache.put(Integer.valueOf(2048+256),
                                 new DSAParameterSpec(p2048_256, q2048_256, g2048_256));

         // use DSA parameters for DH as well
         dhCache.put(Integer.valueOf(512), new DHParameterSpec(p512, g512));
         dhCache.put(Integer.valueOf(768), new DHParameterSpec(p768, g768));
         dhCache.put(Integer.valueOf(1024), new DHParameterSpec(p1024, g1024));
         dhCache.put(Integer.valueOf(2048), new DHParameterSpec(p2048_224, g2048_224));
     }

 }
	/*
	* Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.security.provider;

	import java.util.*;
	import java.util.concurrent.ConcurrentHashMap;
	import java.math.BigInteger;

	import java.security.*;
	import java.security.SecureRandom;
	import java.security.spec.*;

	import javax.crypto.spec.DHParameterSpec;

	/**
	* Cache for DSA and DH parameter specs. Used by the KeyPairGenerators
	* in the Sun, SunJCE, and SunPKCS11 provider if no parameters have been
	* explicitly specified by the application.
	*
	* @author Andreas Sterbenz
	* @since 1.5
	*/
	public final class ParameterCache {

	private ParameterCache() {
	// empty
	}

	// cache of DSA parameters
	private static final Map<Integer,DSAParameterSpec> dsaCache;

	// cache of DH parameters
	private static final Map<Integer,DHParameterSpec> dhCache;

	/**
	* Return cached DSA parameters for the given length combination of
	* prime and subprime, or null if none are available in the cache.
	*/
	public static DSAParameterSpec getCachedDSAParameterSpec(int primeLen,
	int subprimeLen) {
	// ensure the sum is unique in all cases, i.e.
	// case#1: (512 <= p <= 1024) AND q=160
	// case#2: p=2048 AND q=224
	// case#3: p=2048 AND q=256
	// (NOT-YET-SUPPORTED)case#4: p=3072 AND q=256
	return dsaCache.get(Integer.valueOf(primeLen+subprimeLen));
	}

	/**
	* Return cached DH parameters for the given keylength, or null if none
	* are available in the cache.
	*/
	public static DHParameterSpec getCachedDHParameterSpec(int keyLength) {
	return dhCache.get(Integer.valueOf(keyLength));
	}

	/**
	* Return DSA parameters for the given primeLen. Uses cache if
	* possible, generates new parameters and adds them to the cache
	* otherwise.
	*/
	public static DSAParameterSpec getDSAParameterSpec(int primeLen,
	SecureRandom random)
	throws NoSuchAlgorithmException, InvalidParameterSpecException,
	InvalidAlgorithmParameterException {
	if (primeLen <= 1024) {
	return getDSAParameterSpec(primeLen, 160, random);
	} else if (primeLen == 2048) {
	return getDSAParameterSpec(primeLen, 224, random);
	} else {
	return null;
	}
	}

	/**
	* Return DSA parameters for the given primeLen and subprimeLen.
	* Uses cache if possible, generates new parameters and adds them to the
	* cache otherwise.
	*/
	public static DSAParameterSpec getDSAParameterSpec(int primeLen,
	int subprimeLen, SecureRandom random)
	throws NoSuchAlgorithmException, InvalidParameterSpecException,
	InvalidAlgorithmParameterException {
	DSAParameterSpec spec =
	getCachedDSAParameterSpec(primeLen, subprimeLen);
	if (spec != null) {
	return spec;
	}
	spec = getNewDSAParameterSpec(primeLen, subprimeLen, random);
	dsaCache.put(Integer.valueOf(primeLen + subprimeLen), spec);
	return spec;
	}

	/**
	* Return DH parameters for the given keylength. Uses cache if possible,
	* generates new parameters and adds them to the cache otherwise.
	*/
	public static DHParameterSpec getDHParameterSpec(int keyLength,
	SecureRandom random)
	throws NoSuchAlgorithmException, InvalidParameterSpecException {
	DHParameterSpec spec = getCachedDHParameterSpec(keyLength);
	if (spec != null) {
	return spec;
	}
	AlgorithmParameterGenerator gen =
	AlgorithmParameterGenerator.getInstance("DH");
	gen.init(keyLength, random);
	AlgorithmParameters params = gen.generateParameters();
	spec = params.getParameterSpec(DHParameterSpec.class);
	dhCache.put(Integer.valueOf(keyLength), spec);
	return spec;
	}

	/**
	* Return new DSA parameters for the given length combination of prime and
	* sub prime. Do not lookup in cache and do not cache the newly generated
	* parameters. This method really only exists for the legacy method
	* DSAKeyPairGenerator.initialize(int, boolean, SecureRandom).
	*/
	public static DSAParameterSpec getNewDSAParameterSpec(int primeLen,
	int subprimeLen, SecureRandom random)
	throws NoSuchAlgorithmException, InvalidParameterSpecException,
	InvalidAlgorithmParameterException {
	AlgorithmParameterGenerator gen =
	AlgorithmParameterGenerator.getInstance("DSA");
	// Use init(int size, SecureRandom random) for legacy DSA key sizes
	if (primeLen < 1024) {
	gen.init(primeLen, random);
	} else {
	DSAGenParameterSpec genParams =
	new DSAGenParameterSpec(primeLen, subprimeLen);
	gen.init(genParams, random);
	}
	AlgorithmParameters params = gen.generateParameters();
	DSAParameterSpec spec = params.getParameterSpec(DSAParameterSpec.class);
	return spec;
	}

	static {
	dhCache = new ConcurrentHashMap<Integer,DHParameterSpec>();
	dsaCache = new ConcurrentHashMap<Integer,DSAParameterSpec>();

	/*
	* We support precomputed parameter for legacy 512, 768 bit moduli,
	* and (L, N) combinations of (1024, 160), (2048, 224), (2048, 256).
	* In this file we provide both the seed and counter
	* value of the generation process for each of these seeds,
	* for validation purposes. We also include the test vectors
	* from the DSA specification, FIPS 186, and the FIPS 186
	* Change No 1, which updates the test vector using SHA-1
	* instead of SHA (for both the G function and the message
	* hash.
	*/

	/*
	* L = 512
	* SEED = b869c82b35d70e1b1ff91b28e37a62ecdc34409b
	* counter = 123
	*/
	BigInteger p512 =
	new BigInteger("fca682ce8e12caba26efccf7110e526db078b05edecb" +
	"cd1eb4a208f3ae1617ae01f35b91a47e6df63413c5e1" +
	"2ed0899bcd132acd50d99151bdc43ee737592e17", 16);

	BigInteger q512 =
	new BigInteger("962eddcc369cba8ebb260ee6b6a126d9346e38c5", 16);

	BigInteger g512 =
	new BigInteger("678471b27a9cf44ee91a49c5147db1a9aaf244f05a43" +
	"4d6486931d2d14271b9e35030b71fd73da179069b32e" +
	"2935630e1c2062354d0da20a6c416e50be794ca4", 16);

	/*
	* L = 768
	* SEED = 77d0f8c4dad15eb8c4f2f8d6726cefd96d5bb399
	* counter = 263
	*/
	BigInteger p768 =
	new BigInteger("e9e642599d355f37c97ffd3567120b8e25c9cd43e" +
	"927b3a9670fbec5d890141922d2c3b3ad24800937" +
	"99869d1e846aab49fab0ad26d2ce6a22219d470bc" +
	"e7d777d4a21fbe9c270b57f607002f3cef8393694" +
	"cf45ee3688c11a8c56ab127a3daf", 16);

	BigInteger q768 =
	new BigInteger("9cdbd84c9f1ac2f38d0f80f42ab952e7338bf511",
	16);

	BigInteger g768 =
	new BigInteger("30470ad5a005fb14ce2d9dcd87e38bc7d1b1c5fac" +
	"baecbe95f190aa7a31d23c4dbbcbe06174544401a" +
	"5b2c020965d8c2bd2171d3668445771f74ba084d2" +
	"029d83c1c158547f3a9f1a2715be23d51ae4d3e5a" +
	"1f6a7064f316933a346d3f529252", 16);


	/*
	* L = 1024
	* SEED = 8d5155894229d5e689ee01e6018a237e2cae64cd
	* counter = 92
	*/
	BigInteger p1024 =
	new BigInteger("fd7f53811d75122952df4a9c2eece4e7f611b7523c" +
	"ef4400c31e3f80b6512669455d402251fb593d8d58" +
	"fabfc5f5ba30f6cb9b556cd7813b801d346ff26660" +
	"b76b9950a5a49f9fe8047b1022c24fbba9d7feb7c6" +
	"1bf83b57e7c6a8a6150f04fb83f6d3c51ec3023554" +
	"135a169132f675f3ae2b61d72aeff22203199dd148" +
	"01c7", 16);

	BigInteger q1024 =
	new BigInteger("9760508f15230bccb292b982a2eb840bf0581cf5",
	16);

	BigInteger g1024 =
	new BigInteger("f7e1a085d69b3ddecbbcab5c36b857b97994afbbfa" +
	"3aea82f9574c0b3d0782675159578ebad4594fe671" +
	"07108180b449167123e84c281613b7cf09328cc8a6" +
	"e13c167a8b547c8d28e0a3ae1e2bb3a675916ea37f" +
	"0bfa213562f1fb627a01243bcca4f1bea8519089a8" +
	"83dfe15ae59f06928b665e807b552564014c3bfecf" +
	"492a", 16);

	dsaCache.put(Integer.valueOf(512+160),
	new DSAParameterSpec(p512, q512, g512));
	dsaCache.put(Integer.valueOf(768+160),
	new DSAParameterSpec(p768, q768, g768));
	dsaCache.put(Integer.valueOf(1024+160),
	new DSAParameterSpec(p1024, q1024, g1024));
	/*
	* L = 2048, N = 224
	* SEED = 584236080cfa43c09b02354135f4cc5198a19efada08bd866d601ba4
	* counter = 2666
	*/
	BigInteger p2048_224 =
	new BigInteger("8f7935d9b9aae9bfabed887acf4951b6f32ec59e3b" +
	"af3718e8eac4961f3efd3606e74351a9c4183339b8" +
	"09e7c2ae1c539ba7475b85d011adb8b47987754984" +
	"695cac0e8f14b3360828a22ffa27110a3d62a99345" +
	"3409a0fe696c4658f84bdd20819c3709a01057b195" +
	"adcd00233dba5484b6291f9d648ef883448677979c" +
	"ec04b434a6ac2e75e9985de23db0292fc1118c9ffa" +
	"9d8181e7338db792b730d7b9e349592f6809987215" +
	"3915ea3d6b8b4653c633458f803b32a4c2e0f27290" +
	"256e4e3f8a3b0838a1c450e4e18c1a29a37ddf5ea1" +
	"43de4b66ff04903ed5cf1623e158d487c608e97f21" +
	"1cd81dca23cb6e380765f822e342be484c05763939" +
	"601cd667", 16);

	BigInteger q2048_224 =
	new BigInteger("baf696a68578f7dfdee7fa67c977c785ef32b233ba" +
	"e580c0bcd5695d", 16);

	BigInteger g2048_224 =
	new BigInteger("16a65c58204850704e7502a39757040d34da3a3478" +
	"c154d4e4a5c02d242ee04f96e61e4bd0904abdac8f" +
	"37eeb1e09f3182d23c9043cb642f88004160edf9ca" +
	"09b32076a79c32a627f2473e91879ba2c4e744bd20" +
	"81544cb55b802c368d1fa83ed489e94e0fa0688e32" +
	"428a5c78c478c68d0527b71c9a3abb0b0be12c4468" +
	"9639e7d3ce74db101a65aa2b87f64c6826db3ec72f" +
	"4b5599834bb4edb02f7c90e9a496d3a55d535bebfc" +
	"45d4f619f63f3dedbb873925c2f224e07731296da8" +
	"87ec1e4748f87efb5fdeb75484316b2232dee553dd" +
	"af02112b0d1f02da30973224fe27aeda8b9d4b2922" +
	"d9ba8be39ed9e103a63c52810bc688b7e2ed4316e1" +
	"ef17dbde", 16);
	dsaCache.put(Integer.valueOf(2048+224),
	new DSAParameterSpec(p2048_224, q2048_224, g2048_224));

	/*
	* L = 2048, N = 256
	* SEED = b0b4417601b59cbc9d8ac8f935cadaec4f5fbb2f23785609ae466748d9b5a536
	* counter = 497
	*/
	BigInteger p2048_256 =
	new BigInteger("95475cf5d93e596c3fcd1d902add02f427f5f3c721" +
	"0313bb45fb4d5bb2e5fe1cbd678cd4bbdd84c9836b" +
	"e1f31c0777725aeb6c2fc38b85f48076fa76bcd814" +
	"6cc89a6fb2f706dd719898c2083dc8d896f84062e2" +
	"c9c94d137b054a8d8096adb8d51952398eeca852a0" +
	"af12df83e475aa65d4ec0c38a9560d5661186ff98b" +
	"9fc9eb60eee8b030376b236bc73be3acdbd74fd61c" +
	"1d2475fa3077b8f080467881ff7e1ca56fee066d79" +
	"506ade51edbb5443a563927dbc4ba520086746175c" +
	"8885925ebc64c6147906773496990cb714ec667304" +
	"e261faee33b3cbdf008e0c3fa90650d97d3909c927" +
	"5bf4ac86ffcb3d03e6dfc8ada5934242dd6d3bcca2" +
	"a406cb0b", 16);

	BigInteger q2048_256 =
	new BigInteger("f8183668ba5fc5bb06b5981e6d8b795d30b8978d43" +
	"ca0ec572e37e09939a9773", 16);

	BigInteger g2048_256 =
	new BigInteger("42debb9da5b3d88cc956e08787ec3f3a09bba5f48b" +
	"889a74aaf53174aa0fbe7e3c5b8fcd7a53bef563b0" +
	"e98560328960a9517f4014d3325fc7962bf1e04937" +
	"0d76d1314a76137e792f3f0db859d095e4a5b93202" +
	"4f079ecf2ef09c797452b0770e1350782ed57ddf79" +
	"4979dcef23cb96f183061965c4ebc93c9c71c56b92" +
	"5955a75f94cccf1449ac43d586d0beee43251b0b22" +
	"87349d68de0d144403f13e802f4146d882e057af19" +
	"b6f6275c6676c8fa0e3ca2713a3257fd1b27d0639f" +
	"695e347d8d1cf9ac819a26ca9b04cb0eb9b7b03598" +
	"8d15bbac65212a55239cfc7e58fae38d7250ab9991" +
	"ffbc97134025fe8ce04c4399ad96569be91a546f49" +
	"78693c7a", 16);
	dsaCache.put(Integer.valueOf(2048+256),
	new DSAParameterSpec(p2048_256, q2048_256, g2048_256));

	// use DSA parameters for DH as well
	dhCache.put(Integer.valueOf(512), new DHParameterSpec(p512, g512));
	dhCache.put(Integer.valueOf(768), new DHParameterSpec(p768, g768));
	dhCache.put(Integer.valueOf(1024), new DHParameterSpec(p1024, g1024));
	dhCache.put(Integer.valueOf(2048), new DHParameterSpec(p2048_224, g2048_224));
	}

	}