X962NamedCurves.java revision e6bf3e8dfa2804891a82075cb469b736321b4827 
1package org.bouncycastle.asn1.x9;
2
3import java.math.BigInteger;
4import java.util.Enumeration;
5import java.util.Hashtable;
6
7import org.bouncycastle.asn1.ASN1ObjectIdentifier;
8import org.bouncycastle.math.ec.ECCurve;
9import org.bouncycastle.util.Strings;
10import org.bouncycastle.util.encoders.Hex;
11
12
13/**
14 * table of the current named curves defined in X.962 EC-DSA.
15 */
16public class X962NamedCurves
17{
18    static X9ECParametersHolder prime192v1 = new X9ECParametersHolder()
19    {
20        protected X9ECParameters createParameters()
21        {
22            ECCurve cFp192v1 = new ECCurve.Fp(
23                new BigInteger("6277101735386680763835789423207666416083908700390324961279"),
24                new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16),
25                new BigInteger("64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1", 16));
26
27            return new X9ECParameters(
28                cFp192v1,
29                cFp192v1.decodePoint(
30                    Hex.decode("03188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012")),
31                new BigInteger("ffffffffffffffffffffffff99def836146bc9b1b4d22831", 16),
32                BigInteger.valueOf(1),
33                Hex.decode("3045AE6FC8422f64ED579528D38120EAE12196D5"));
34        }
35    };
36
37    static X9ECParametersHolder prime192v2 = new X9ECParametersHolder()
38    {
39        protected X9ECParameters createParameters()
40        {
41            ECCurve cFp192v2 = new ECCurve.Fp(
42                new BigInteger("6277101735386680763835789423207666416083908700390324961279"),
43                new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16),
44                new BigInteger("cc22d6dfb95c6b25e49c0d6364a4e5980c393aa21668d953", 16));
45
46            return new X9ECParameters(
47                cFp192v2,
48                cFp192v2.decodePoint(
49                    Hex.decode("03eea2bae7e1497842f2de7769cfe9c989c072ad696f48034a")),
50                new BigInteger("fffffffffffffffffffffffe5fb1a724dc80418648d8dd31", 16),
51                BigInteger.valueOf(1),
52                Hex.decode("31a92ee2029fd10d901b113e990710f0d21ac6b6"));
53        }
54    };
55
56    static X9ECParametersHolder prime192v3 = new X9ECParametersHolder()
57    {
58        protected X9ECParameters createParameters()
59        {
60            ECCurve cFp192v3 = new ECCurve.Fp(
61                new BigInteger("6277101735386680763835789423207666416083908700390324961279"),
62                new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16),
63                new BigInteger("22123dc2395a05caa7423daeccc94760a7d462256bd56916", 16));
64
65            return new X9ECParameters(
66                cFp192v3,
67                cFp192v3.decodePoint(
68                    Hex.decode("027d29778100c65a1da1783716588dce2b8b4aee8e228f1896")),
69                new BigInteger("ffffffffffffffffffffffff7a62d031c83f4294f640ec13", 16),
70                BigInteger.valueOf(1),
71                Hex.decode("c469684435deb378c4b65ca9591e2a5763059a2e"));
72        }
73    };
74
75    static X9ECParametersHolder prime239v1 = new X9ECParametersHolder()
76    {
77        protected X9ECParameters createParameters()
78        {
79            ECCurve cFp239v1 = new ECCurve.Fp(
80                new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"),
81                new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16),
82                new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16));
83
84            return new X9ECParameters(
85                cFp239v1,
86                cFp239v1.decodePoint(
87                    Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")),
88                new BigInteger("7fffffffffffffffffffffff7fffff9e5e9a9f5d9071fbd1522688909d0b", 16),
89                BigInteger.valueOf(1),
90                Hex.decode("e43bb460f0b80cc0c0b075798e948060f8321b7d"));
91        }
92    };
93
94    static X9ECParametersHolder prime239v2 = new X9ECParametersHolder()
95    {
96        protected X9ECParameters createParameters()
97        {
98            ECCurve cFp239v2 = new ECCurve.Fp(
99                new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"),
100                new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16),
101                new BigInteger("617fab6832576cbbfed50d99f0249c3fee58b94ba0038c7ae84c8c832f2c", 16));
102
103            return new X9ECParameters(
104                cFp239v2,
105                cFp239v2.decodePoint(
106                    Hex.decode("0238af09d98727705120c921bb5e9e26296a3cdcf2f35757a0eafd87b830e7")),
107                new BigInteger("7fffffffffffffffffffffff800000cfa7e8594377d414c03821bc582063", 16),
108                BigInteger.valueOf(1),
109                Hex.decode("e8b4011604095303ca3b8099982be09fcb9ae616"));
110        }
111    };
112
113    static X9ECParametersHolder prime239v3 = new X9ECParametersHolder()
114    {
115        protected X9ECParameters createParameters()
116        {
117            ECCurve cFp239v3 = new ECCurve.Fp(
118                new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"),
119                new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16),
120                new BigInteger("255705fa2a306654b1f4cb03d6a750a30c250102d4988717d9ba15ab6d3e", 16));
121
122            return new X9ECParameters(
123                cFp239v3,
124                cFp239v3.decodePoint(
125                    Hex.decode("036768ae8e18bb92cfcf005c949aa2c6d94853d0e660bbf854b1c9505fe95a")),
126                new BigInteger("7fffffffffffffffffffffff7fffff975deb41b3a6057c3c432146526551", 16),
127                BigInteger.valueOf(1),
128                Hex.decode("7d7374168ffe3471b60a857686a19475d3bfa2ff"));
129        }
130    };
131
132    static X9ECParametersHolder prime256v1 = new X9ECParametersHolder()
133    {
134        protected X9ECParameters createParameters()
135        {
136            ECCurve cFp256v1 = new ECCurve.Fp(
137                new BigInteger("115792089210356248762697446949407573530086143415290314195533631308867097853951"),
138                new BigInteger("ffffffff00000001000000000000000000000000fffffffffffffffffffffffc", 16),
139                new BigInteger("5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b", 16));
140
141            return new X9ECParameters(
142                cFp256v1,
143                cFp256v1.decodePoint(
144                    Hex.decode("036b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296")),
145                new BigInteger("ffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551", 16),
146                BigInteger.valueOf(1),
147                Hex.decode("c49d360886e704936a6678e1139d26b7819f7e90"));
148        }
149    };
150
151    /*
152     * F2m Curves
153     */
154    static X9ECParametersHolder c2pnb163v1 = new X9ECParametersHolder()
155    {
156        protected X9ECParameters createParameters()
157        {
158            BigInteger c2m163v1n = new BigInteger("0400000000000000000001E60FC8821CC74DAEAFC1", 16);
159            BigInteger c2m163v1h = BigInteger.valueOf(2);
160
161            ECCurve c2m163v1 = new ECCurve.F2m(
162                163,
163                1, 2, 8,
164                new BigInteger("072546B5435234A422E0789675F432C89435DE5242", 16),
165                new BigInteger("00C9517D06D5240D3CFF38C74B20B6CD4D6F9DD4D9", 16),
166                c2m163v1n, c2m163v1h);
167
168            return new X9ECParameters(
169                c2m163v1,
170                c2m163v1.decodePoint(
171                    Hex.decode("0307AF69989546103D79329FCC3D74880F33BBE803CB")),
172                c2m163v1n, c2m163v1h,
173                Hex.decode("D2COFB15760860DEF1EEF4D696E6768756151754"));
174        }
175    };
176
177    static X9ECParametersHolder c2pnb163v2 = new X9ECParametersHolder()
178    {
179        protected X9ECParameters createParameters()
180        {
181            BigInteger c2m163v2n = new BigInteger("03FFFFFFFFFFFFFFFFFFFDF64DE1151ADBB78F10A7", 16);
182            BigInteger c2m163v2h = BigInteger.valueOf(2);
183
184            ECCurve c2m163v2 = new ECCurve.F2m(
185                163,
186                1, 2, 8,
187                new BigInteger("0108B39E77C4B108BED981ED0E890E117C511CF072", 16),
188                new BigInteger("0667ACEB38AF4E488C407433FFAE4F1C811638DF20", 16),
189                c2m163v2n, c2m163v2h);
190
191            return new X9ECParameters(
192                c2m163v2,
193                c2m163v2.decodePoint(
194                    Hex.decode("030024266E4EB5106D0A964D92C4860E2671DB9B6CC5")),
195                c2m163v2n, c2m163v2h,
196                null);
197        }
198    };
199
200    static X9ECParametersHolder c2pnb163v3 = new X9ECParametersHolder()
201    {
202        protected X9ECParameters createParameters()
203        {
204            BigInteger c2m163v3n = new BigInteger("03FFFFFFFFFFFFFFFFFFFE1AEE140F110AFF961309", 16);
205            BigInteger c2m163v3h = BigInteger.valueOf(2);
206
207            ECCurve c2m163v3 = new ECCurve.F2m(
208                163,
209                1, 2, 8,
210                new BigInteger("07A526C63D3E25A256A007699F5447E32AE456B50E", 16),
211                new BigInteger("03F7061798EB99E238FD6F1BF95B48FEEB4854252B", 16),
212                c2m163v3n, c2m163v3h);
213
214            return new X9ECParameters(
215                c2m163v3,
216                c2m163v3.decodePoint(
217                    Hex.decode("0202F9F87B7C574D0BDECF8A22E6524775F98CDEBDCB")),
218                c2m163v3n, c2m163v3h,
219                null);
220        }
221    };
222
223    static X9ECParametersHolder c2pnb176w1 = new X9ECParametersHolder()
224    {
225        protected X9ECParameters createParameters()
226        {
227            BigInteger c2m176w1n = new BigInteger("010092537397ECA4F6145799D62B0A19CE06FE26AD", 16);
228            BigInteger c2m176w1h = BigInteger.valueOf(0xFF6E);
229
230            ECCurve c2m176w1 = new ECCurve.F2m(
231                176,
232                1, 2, 43,
233                new BigInteger("00E4E6DB2995065C407D9D39B8D0967B96704BA8E9C90B", 16),
234                new BigInteger("005DDA470ABE6414DE8EC133AE28E9BBD7FCEC0AE0FFF2", 16),
235                c2m176w1n, c2m176w1h);
236
237            return new X9ECParameters(
238                c2m176w1,
239                c2m176w1.decodePoint(
240                    Hex.decode("038D16C2866798B600F9F08BB4A8E860F3298CE04A5798")),
241                c2m176w1n, c2m176w1h,
242                null);
243        }
244    };
245
246    static X9ECParametersHolder c2tnb191v1 = new X9ECParametersHolder()
247    {
248        protected X9ECParameters createParameters()
249        {
250            BigInteger c2m191v1n = new BigInteger("40000000000000000000000004A20E90C39067C893BBB9A5", 16);
251            BigInteger c2m191v1h = BigInteger.valueOf(2);
252
253            ECCurve c2m191v1 = new ECCurve.F2m(
254                191,
255                9,
256                new BigInteger("2866537B676752636A68F56554E12640276B649EF7526267", 16),
257                new BigInteger("2E45EF571F00786F67B0081B9495A3D95462F5DE0AA185EC", 16),
258                c2m191v1n, c2m191v1h);
259
260            return new X9ECParameters(
261                c2m191v1,
262                c2m191v1.decodePoint(
263                    Hex.decode("0236B3DAF8A23206F9C4F299D7B21A9C369137F2C84AE1AA0D")),
264                c2m191v1n, c2m191v1h,
265                Hex.decode("4E13CA542744D696E67687561517552F279A8C84"));
266        }
267    };
268
269    static X9ECParametersHolder c2tnb191v2 = new X9ECParametersHolder()
270    {
271        protected X9ECParameters createParameters()
272        {
273            BigInteger c2m191v2n = new BigInteger("20000000000000000000000050508CB89F652824E06B8173", 16);
274            BigInteger c2m191v2h = BigInteger.valueOf(4);
275
276            ECCurve c2m191v2 = new ECCurve.F2m(
277                191,
278                9,
279                new BigInteger("401028774D7777C7B7666D1366EA432071274F89FF01E718", 16),
280                new BigInteger("0620048D28BCBD03B6249C99182B7C8CD19700C362C46A01", 16),
281                c2m191v2n, c2m191v2h);
282
283            return new X9ECParameters(
284                c2m191v2,
285                c2m191v2.decodePoint(
286                    Hex.decode("023809B2B7CC1B28CC5A87926AAD83FD28789E81E2C9E3BF10")),
287                c2m191v2n, c2m191v2h,
288                null);
289        }
290    };
291
292    static X9ECParametersHolder c2tnb191v3 = new X9ECParametersHolder()
293    {
294        protected X9ECParameters createParameters()
295        {
296            BigInteger c2m191v3n = new BigInteger("155555555555555555555555610C0B196812BFB6288A3EA3", 16);
297            BigInteger c2m191v3h = BigInteger.valueOf(6);
298
299            ECCurve c2m191v3 = new ECCurve.F2m(
300                191,
301                9,
302                new BigInteger("6C01074756099122221056911C77D77E77A777E7E7E77FCB", 16),
303                new BigInteger("71FE1AF926CF847989EFEF8DB459F66394D90F32AD3F15E8", 16),
304                c2m191v3n, c2m191v3h);
305
306            return new X9ECParameters(
307                c2m191v3,
308                c2m191v3.decodePoint(
309                    Hex.decode("03375D4CE24FDE434489DE8746E71786015009E66E38A926DD")),
310                c2m191v3n, c2m191v3h,
311                null);
312        }
313    };
314
315    static X9ECParametersHolder c2pnb208w1 = new X9ECParametersHolder()
316    {
317        protected X9ECParameters createParameters()
318        {
319            BigInteger c2m208w1n = new BigInteger("0101BAF95C9723C57B6C21DA2EFF2D5ED588BDD5717E212F9D", 16);
320            BigInteger c2m208w1h = BigInteger.valueOf(0xFE48);
321
322            ECCurve c2m208w1 = new ECCurve.F2m(
323                208,
324                1, 2, 83,
325                new BigInteger("0", 16),
326                new BigInteger("00C8619ED45A62E6212E1160349E2BFA844439FAFC2A3FD1638F9E", 16),
327                c2m208w1n, c2m208w1h);
328
329            return new X9ECParameters(
330                c2m208w1,
331                c2m208w1.decodePoint(
332                    Hex.decode("0289FDFBE4ABE193DF9559ECF07AC0CE78554E2784EB8C1ED1A57A")),
333                c2m208w1n, c2m208w1h,
334                null);
335        }
336    };
337
338    static X9ECParametersHolder c2tnb239v1 = new X9ECParametersHolder()
339    {
340        protected X9ECParameters createParameters()
341        {
342            BigInteger c2m239v1n = new BigInteger("2000000000000000000000000000000F4D42FFE1492A4993F1CAD666E447", 16);
343            BigInteger c2m239v1h = BigInteger.valueOf(4);
344
345            ECCurve c2m239v1 = new ECCurve.F2m(
346                239,
347                36,
348                new BigInteger("32010857077C5431123A46B808906756F543423E8D27877578125778AC76", 16),
349                new BigInteger("790408F2EEDAF392B012EDEFB3392F30F4327C0CA3F31FC383C422AA8C16", 16),
350                c2m239v1n, c2m239v1h);
351
352            return new X9ECParameters(
353                c2m239v1,
354                c2m239v1.decodePoint(
355                    Hex.decode("0257927098FA932E7C0A96D3FD5B706EF7E5F5C156E16B7E7C86038552E91D")),
356                c2m239v1n, c2m239v1h,
357                null);
358        }
359    };
360
361    static X9ECParametersHolder c2tnb239v2 = new X9ECParametersHolder()
362    {
363        protected X9ECParameters createParameters()
364        {
365            BigInteger c2m239v2n = new BigInteger("1555555555555555555555555555553C6F2885259C31E3FCDF154624522D", 16);
366            BigInteger c2m239v2h = BigInteger.valueOf(6);
367
368            ECCurve c2m239v2 = new ECCurve.F2m(
369                239,
370                36,
371                new BigInteger("4230017757A767FAE42398569B746325D45313AF0766266479B75654E65F", 16),
372                new BigInteger("5037EA654196CFF0CD82B2C14A2FCF2E3FF8775285B545722F03EACDB74B", 16),
373                c2m239v2n, c2m239v2h);
374
375            return new X9ECParameters(
376                c2m239v2,
377                c2m239v2.decodePoint(
378                    Hex.decode("0228F9D04E900069C8DC47A08534FE76D2B900B7D7EF31F5709F200C4CA205")),
379                c2m239v2n, c2m239v2h,
380                null);
381        }
382    };
383
384    static X9ECParametersHolder c2tnb239v3 = new X9ECParametersHolder()
385    {
386        protected X9ECParameters createParameters()
387        {
388            BigInteger c2m239v3n = new BigInteger("0CCCCCCCCCCCCCCCCCCCCCCCCCCCCCAC4912D2D9DF903EF9888B8A0E4CFF", 16);
389            BigInteger c2m239v3h = BigInteger.valueOf(10);
390
391            ECCurve c2m239v3 = new ECCurve.F2m(
392                239,
393                36,
394                new BigInteger("01238774666A67766D6676F778E676B66999176666E687666D8766C66A9F", 16),
395                new BigInteger("6A941977BA9F6A435199ACFC51067ED587F519C5ECB541B8E44111DE1D40", 16),
396                c2m239v3n, c2m239v3h);
397
398            return new X9ECParameters(
399                c2m239v3,
400                c2m239v3.decodePoint(
401                    Hex.decode("0370F6E9D04D289C4E89913CE3530BFDE903977D42B146D539BF1BDE4E9C92")),
402                c2m239v3n, c2m239v3h,
403                null);
404        }
405    };
406
407    static X9ECParametersHolder c2pnb272w1 = new X9ECParametersHolder()
408    {
409        protected X9ECParameters createParameters()
410        {
411            BigInteger c2m272w1n = new BigInteger("0100FAF51354E0E39E4892DF6E319C72C8161603FA45AA7B998A167B8F1E629521", 16);
412            BigInteger c2m272w1h = BigInteger.valueOf(0xFF06);
413
414            ECCurve c2m272w1 = new ECCurve.F2m(
415                272,
416                1, 3, 56,
417                new BigInteger("0091A091F03B5FBA4AB2CCF49C4EDD220FB028712D42BE752B2C40094DBACDB586FB20", 16),
418                new BigInteger("7167EFC92BB2E3CE7C8AAAFF34E12A9C557003D7C73A6FAF003F99F6CC8482E540F7", 16),
419                c2m272w1n, c2m272w1h);
420
421            return new X9ECParameters(
422                c2m272w1,
423                c2m272w1.decodePoint(
424                    Hex.decode("026108BABB2CEEBCF787058A056CBE0CFE622D7723A289E08A07AE13EF0D10D171DD8D")),
425                c2m272w1n, c2m272w1h,
426                null);
427        }
428    };
429
430    static X9ECParametersHolder c2pnb304w1 = new X9ECParametersHolder()
431    {
432        protected X9ECParameters createParameters()
433        {
434            BigInteger c2m304w1n = new BigInteger("0101D556572AABAC800101D556572AABAC8001022D5C91DD173F8FB561DA6899164443051D", 16);
435            BigInteger c2m304w1h = BigInteger.valueOf(0xFE2E);
436
437            ECCurve c2m304w1 = new ECCurve.F2m(
438                304,
439                1, 2, 11,
440                new BigInteger("00FD0D693149A118F651E6DCE6802085377E5F882D1B510B44160074C1288078365A0396C8E681", 16),
441                new BigInteger("00BDDB97E555A50A908E43B01C798EA5DAA6788F1EA2794EFCF57166B8C14039601E55827340BE", 16),
442                c2m304w1n, c2m304w1h);
443
444            return new X9ECParameters(
445                c2m304w1,
446                c2m304w1.decodePoint(
447                    Hex.decode("02197B07845E9BE2D96ADB0F5F3C7F2CFFBD7A3EB8B6FEC35C7FD67F26DDF6285A644F740A2614")),
448                c2m304w1n, c2m304w1h,
449                null);
450        }
451    };
452
453    static X9ECParametersHolder c2tnb359v1 = new X9ECParametersHolder()
454    {
455        protected X9ECParameters createParameters()
456        {
457            BigInteger c2m359v1n = new BigInteger("01AF286BCA1AF286BCA1AF286BCA1AF286BCA1AF286BC9FB8F6B85C556892C20A7EB964FE7719E74F490758D3B", 16);
458            BigInteger c2m359v1h = BigInteger.valueOf(0x4C);
459
460            ECCurve c2m359v1 = new ECCurve.F2m(
461                359,
462                68,
463                new BigInteger("5667676A654B20754F356EA92017D946567C46675556F19556A04616B567D223A5E05656FB549016A96656A557", 16),
464                new BigInteger("2472E2D0197C49363F1FE7F5B6DB075D52B6947D135D8CA445805D39BC345626089687742B6329E70680231988", 16),
465                c2m359v1n, c2m359v1h);
466
467            return new X9ECParameters(
468                c2m359v1,
469                c2m359v1.decodePoint(
470                    Hex.decode("033C258EF3047767E7EDE0F1FDAA79DAEE3841366A132E163ACED4ED2401DF9C6BDCDE98E8E707C07A2239B1B097")),
471                c2m359v1n, c2m359v1h,
472                null);
473        }
474    };
475
476    static X9ECParametersHolder c2pnb368w1 = new X9ECParametersHolder()
477    {
478        protected X9ECParameters createParameters()
479        {
480            BigInteger c2m368w1n = new BigInteger("010090512DA9AF72B08349D98A5DD4C7B0532ECA51CE03E2D10F3B7AC579BD87E909AE40A6F131E9CFCE5BD967", 16);
481            BigInteger c2m368w1h = BigInteger.valueOf(0xFF70);
482
483            ECCurve c2m368w1 = new ECCurve.F2m(
484                368,
485                1, 2, 85,
486                new BigInteger("00E0D2EE25095206F5E2A4F9ED229F1F256E79A0E2B455970D8D0D865BD94778C576D62F0AB7519CCD2A1A906AE30D", 16),
487                new BigInteger("00FC1217D4320A90452C760A58EDCD30C8DD069B3C34453837A34ED50CB54917E1C2112D84D164F444F8F74786046A", 16),
488                c2m368w1n, c2m368w1h);
489
490            return new X9ECParameters(
491                c2m368w1,
492                c2m368w1.decodePoint(
493                    Hex.decode("021085E2755381DCCCE3C1557AFA10C2F0C0C2825646C5B34A394CBCFA8BC16B22E7E789E927BE216F02E1FB136A5F")),
494                c2m368w1n, c2m368w1h,
495                null);
496        }
497    };
498
499    static X9ECParametersHolder c2tnb431r1 = new X9ECParametersHolder()
500    {
501        protected X9ECParameters createParameters()
502        {
503            BigInteger c2m431r1n = new BigInteger("0340340340340340340340340340340340340340340340340340340323C313FAB50589703B5EC68D3587FEC60D161CC149C1AD4A91", 16);
504            BigInteger c2m431r1h = BigInteger.valueOf(0x2760);
505
506            ECCurve c2m431r1 = new ECCurve.F2m(
507                431,
508                120,
509                new BigInteger("1A827EF00DD6FC0E234CAF046C6A5D8A85395B236CC4AD2CF32A0CADBDC9DDF620B0EB9906D0957F6C6FEACD615468DF104DE296CD8F", 16),
510                new BigInteger("10D9B4A3D9047D8B154359ABFB1B7F5485B04CEB868237DDC9DEDA982A679A5A919B626D4E50A8DD731B107A9962381FB5D807BF2618", 16),
511                c2m431r1n, c2m431r1h);
512
513            return new X9ECParameters(
514                c2m431r1,
515                c2m431r1.decodePoint(
516                    Hex.decode("02120FC05D3C67A99DE161D2F4092622FECA701BE4F50F4758714E8A87BBF2A658EF8C21E7C5EFE965361F6C2999C0C247B0DBD70CE6B7")),
517                c2m431r1n, c2m431r1h,
518                null);
519        }
520    };
521
522    static final Hashtable objIds = new Hashtable();
523    static final Hashtable curves = new Hashtable();
524    static final Hashtable names = new Hashtable();
525
526    static void defineCurve(String name, ASN1ObjectIdentifier oid, X9ECParametersHolder holder)
527    {
528        objIds.put(name, oid);
529        names.put(oid, name);
530        curves.put(oid, holder);
531    }
532
533    static
534    {
535        defineCurve("prime192v1", X9ObjectIdentifiers.prime192v1, prime192v1);
536        defineCurve("prime192v2", X9ObjectIdentifiers.prime192v2, prime192v2);
537        defineCurve("prime192v3", X9ObjectIdentifiers.prime192v3, prime192v3);
538        defineCurve("prime239v1", X9ObjectIdentifiers.prime239v1, prime239v1);
539        defineCurve("prime239v2", X9ObjectIdentifiers.prime239v2, prime239v2);
540        defineCurve("prime239v3", X9ObjectIdentifiers.prime239v3, prime239v3);
541        defineCurve("prime256v1", X9ObjectIdentifiers.prime256v1, prime256v1);
542        defineCurve("c2pnb163v1", X9ObjectIdentifiers.c2pnb163v1, c2pnb163v1);
543        defineCurve("c2pnb163v2", X9ObjectIdentifiers.c2pnb163v2, c2pnb163v2);
544        defineCurve("c2pnb163v3", X9ObjectIdentifiers.c2pnb163v3, c2pnb163v3);
545        defineCurve("c2pnb176w1", X9ObjectIdentifiers.c2pnb176w1, c2pnb176w1);
546        defineCurve("c2tnb191v1", X9ObjectIdentifiers.c2tnb191v1, c2tnb191v1);
547        defineCurve("c2tnb191v2", X9ObjectIdentifiers.c2tnb191v2, c2tnb191v2);
548        defineCurve("c2tnb191v3", X9ObjectIdentifiers.c2tnb191v3, c2tnb191v3);
549        defineCurve("c2pnb208w1", X9ObjectIdentifiers.c2pnb208w1, c2pnb208w1);
550        defineCurve("c2tnb239v1", X9ObjectIdentifiers.c2tnb239v1, c2tnb239v1);
551        defineCurve("c2tnb239v2", X9ObjectIdentifiers.c2tnb239v2, c2tnb239v2);
552        defineCurve("c2tnb239v3", X9ObjectIdentifiers.c2tnb239v3, c2tnb239v3);
553        defineCurve("c2pnb272w1", X9ObjectIdentifiers.c2pnb272w1, c2pnb272w1);
554        defineCurve("c2pnb304w1", X9ObjectIdentifiers.c2pnb304w1, c2pnb304w1);
555        defineCurve("c2tnb359v1", X9ObjectIdentifiers.c2tnb359v1, c2tnb359v1);
556        defineCurve("c2pnb368w1", X9ObjectIdentifiers.c2pnb368w1, c2pnb368w1);
557        defineCurve("c2tnb431r1", X9ObjectIdentifiers.c2tnb431r1, c2tnb431r1);
558    }
559
560    public static X9ECParameters getByName(
561        String name)
562    {
563        ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier)objIds.get(Strings.toLowerCase(name));
564
565        if (oid != null)
566        {
567            return getByOID(oid);
568        }
569
570        return null;
571    }
572
573    /**
574     * return the X9ECParameters object for the named curve represented by
575     * the passed in object identifier. Null if the curve isn't present.
576     *
577     * @param oid an object identifier representing a named curve, if present.
578     */
579    public static X9ECParameters getByOID(
580        ASN1ObjectIdentifier oid)
581    {
582        X9ECParametersHolder holder = (X9ECParametersHolder)curves.get(oid);
583
584        if (holder != null)
585        {
586            return holder.getParameters();
587        }
588
589        return null;
590    }
591
592    /**
593     * return the object identifier signified by the passed in name. Null
594     * if there is no object identifier associated with name.
595     *
596     * @return the object identifier associated with name, if present.
597     */
598    public static ASN1ObjectIdentifier getOID(
599        String name)
600    {
601        return (ASN1ObjectIdentifier)objIds.get(Strings.toLowerCase(name));
602    }
603
604    /**
605     * return the named curve name represented by the given object identifier.
606     */
607    public static String getName(
608        ASN1ObjectIdentifier oid)
609    {
610        return (String)names.get(oid);
611    }
612
613    /**
614     * returns an enumeration containing the name strings for curves
615     * contained in this structure.
616     */
617    public static Enumeration getNames()
618    {
619        return objIds.keys();
620    }
621}
622