1 package org.bouncycastle.asn1.x9;
2 
3 import java.math.BigInteger;
4 import java.util.Enumeration;
5 import java.util.Hashtable;
6 
7 import org.bouncycastle.asn1.ASN1ObjectIdentifier;
8 import org.bouncycastle.math.ec.ECCurve;
9 import org.bouncycastle.math.ec.WNafUtil;
10 import org.bouncycastle.util.Strings;
11 import org.bouncycastle.util.encoders.Hex;
12 
13 
14 /**
15  * Table of the current named curves defined in X.962 EC-DSA.
16  */
17 public class X962NamedCurves
18 {
configureBasepoint(ECCurve curve, String encoding)19     private static X9ECPoint configureBasepoint(ECCurve curve, String encoding)
20     {
21         X9ECPoint G = new X9ECPoint(curve, Hex.decodeStrict(encoding));
22         WNafUtil.configureBasepoint(G.getPoint());
23         return G;
24     }
25 
configureCurve(ECCurve curve)26     private static ECCurve configureCurve(ECCurve curve)
27     {
28         return curve;
29     }
30 
fromHex(String hex)31     private static BigInteger fromHex(String hex)
32     {
33         return new BigInteger(1, Hex.decodeStrict(hex));
34     }
35 
36     static X9ECParametersHolder prime192v1 = new X9ECParametersHolder()
37     {
38         protected X9ECParameters createParameters()
39         {
40             BigInteger n = fromHex("ffffffffffffffffffffffff99def836146bc9b1b4d22831");
41             BigInteger h = BigInteger.valueOf(1);
42 
43             ECCurve curve = configureCurve(new ECCurve.Fp(
44                 fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF"),
45                 fromHex("fffffffffffffffffffffffffffffffefffffffffffffffc"),
46                 fromHex("64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1"),
47                 n, h));
48 
49             X9ECPoint G = configureBasepoint(curve,
50                 "03188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012");
51 
52             return new X9ECParameters(curve, G, n, h, Hex.decodeStrict("3045AE6FC8422f64ED579528D38120EAE12196D5"));
53         }
54     };
55 
56     static X9ECParametersHolder prime192v2 = new X9ECParametersHolder()
57     {
58         protected X9ECParameters createParameters()
59         {
60             BigInteger n = fromHex("fffffffffffffffffffffffe5fb1a724dc80418648d8dd31");
61             BigInteger h = BigInteger.valueOf(1);
62 
63             ECCurve curve = configureCurve(new ECCurve.Fp(
64                 fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF"),
65                 fromHex("fffffffffffffffffffffffffffffffefffffffffffffffc"),
66                 fromHex("cc22d6dfb95c6b25e49c0d6364a4e5980c393aa21668d953"),
67                 n, h));
68 
69             X9ECPoint G = configureBasepoint(curve,
70                 "03eea2bae7e1497842f2de7769cfe9c989c072ad696f48034a");
71 
72             return new X9ECParameters(curve, G, n, h, Hex.decodeStrict("31a92ee2029fd10d901b113e990710f0d21ac6b6"));
73         }
74     };
75 
76     static X9ECParametersHolder prime192v3 = new X9ECParametersHolder()
77     {
78         protected X9ECParameters createParameters()
79         {
80             BigInteger n = fromHex("ffffffffffffffffffffffff7a62d031c83f4294f640ec13");
81             BigInteger h = BigInteger.valueOf(1);
82 
83             ECCurve curve = configureCurve(new ECCurve.Fp(
84                 fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF"),
85                 fromHex("fffffffffffffffffffffffffffffffefffffffffffffffc"),
86                 fromHex("22123dc2395a05caa7423daeccc94760a7d462256bd56916"),
87                 n, h));
88 
89             X9ECPoint G = configureBasepoint(curve,
90                 "027d29778100c65a1da1783716588dce2b8b4aee8e228f1896");
91 
92             return new X9ECParameters(curve, G, n, h, Hex.decodeStrict("c469684435deb378c4b65ca9591e2a5763059a2e"));
93         }
94     };
95 
96     static X9ECParametersHolder prime239v1 = new X9ECParametersHolder()
97     {
98         protected X9ECParameters createParameters()
99         {
100             BigInteger n = fromHex("7fffffffffffffffffffffff7fffff9e5e9a9f5d9071fbd1522688909d0b");
101             BigInteger h = BigInteger.valueOf(1);
102 
103             ECCurve curve = configureCurve(new ECCurve.Fp(
104                 new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"),
105                 fromHex("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc"),
106                 fromHex("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a"),
107                 n, h));
108 
109             X9ECPoint G = configureBasepoint(curve,
110                 "020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf");
111 
112             return new X9ECParameters(curve, G, n, h, Hex.decodeStrict("e43bb460f0b80cc0c0b075798e948060f8321b7d"));
113         }
114     };
115 
116     static X9ECParametersHolder prime239v2 = new X9ECParametersHolder()
117     {
118         protected X9ECParameters createParameters()
119         {
120             BigInteger n = fromHex("7fffffffffffffffffffffff800000cfa7e8594377d414c03821bc582063");
121             BigInteger h = BigInteger.valueOf(1);
122 
123             ECCurve curve = configureCurve(new ECCurve.Fp(
124                 new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"),
125                 fromHex("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc"),
126                 fromHex("617fab6832576cbbfed50d99f0249c3fee58b94ba0038c7ae84c8c832f2c"),
127                 n, h));
128 
129             X9ECPoint G = configureBasepoint(curve,
130                 "0238af09d98727705120c921bb5e9e26296a3cdcf2f35757a0eafd87b830e7");
131 
132             return new X9ECParameters(curve, G, n, h, Hex.decodeStrict("e8b4011604095303ca3b8099982be09fcb9ae616"));
133         }
134     };
135 
136     static X9ECParametersHolder prime239v3 = new X9ECParametersHolder()
137     {
138         protected X9ECParameters createParameters()
139         {
140             BigInteger n = fromHex("7fffffffffffffffffffffff7fffff975deb41b3a6057c3c432146526551");
141             BigInteger h = BigInteger.valueOf(1);
142 
143             ECCurve curve = configureCurve(new ECCurve.Fp(
144                 new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"),
145                 fromHex("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc"),
146                 fromHex("255705fa2a306654b1f4cb03d6a750a30c250102d4988717d9ba15ab6d3e"),
147                 n, h));
148 
149             X9ECPoint G = configureBasepoint(curve,
150                 "036768ae8e18bb92cfcf005c949aa2c6d94853d0e660bbf854b1c9505fe95a");
151 
152             return new X9ECParameters(curve, G, n, h, Hex.decodeStrict("7d7374168ffe3471b60a857686a19475d3bfa2ff"));
153         }
154     };
155 
156     static X9ECParametersHolder prime256v1 = new X9ECParametersHolder()
157     {
158         protected X9ECParameters createParameters()
159         {
160             BigInteger n = fromHex("ffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551");
161             BigInteger h = BigInteger.valueOf(1);
162 
163             ECCurve curve = configureCurve(new ECCurve.Fp(
164                 new BigInteger("115792089210356248762697446949407573530086143415290314195533631308867097853951"),
165                 fromHex("ffffffff00000001000000000000000000000000fffffffffffffffffffffffc"),
166                 fromHex("5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b"),
167                 n, h));
168 
169             X9ECPoint G = configureBasepoint(curve,
170                 "036b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296");
171 
172             return new X9ECParameters(curve, G, n, h, Hex.decodeStrict("c49d360886e704936a6678e1139d26b7819f7e90"));
173         }
174     };
175 
176     /*
177      * F2m Curves
178      */
179     static X9ECParametersHolder c2pnb163v1 = new X9ECParametersHolder()
180     {
181         protected X9ECParameters createParameters()
182         {
183             BigInteger n = fromHex("0400000000000000000001E60FC8821CC74DAEAFC1");
184             BigInteger h = BigInteger.valueOf(2);
185 
186             ECCurve curve = configureCurve(new ECCurve.F2m(
187                 163,
188                 1, 2, 8,
189                 fromHex("072546B5435234A422E0789675F432C89435DE5242"),
190                 fromHex("00C9517D06D5240D3CFF38C74B20B6CD4D6F9DD4D9"),
191                 n, h));
192 
193             X9ECPoint G = configureBasepoint(curve,
194                 "0307AF69989546103D79329FCC3D74880F33BBE803CB");
195 
196             return new X9ECParameters(curve, G, n, h, Hex.decodeStrict("D2C0FB15760860DEF1EEF4D696E6768756151754"));
197         }
198     };
199 
200     static X9ECParametersHolder c2pnb163v2 = new X9ECParametersHolder()
201     {
202         protected X9ECParameters createParameters()
203         {
204             BigInteger n = fromHex("03FFFFFFFFFFFFFFFFFFFDF64DE1151ADBB78F10A7");
205             BigInteger h = BigInteger.valueOf(2);
206 
207             ECCurve curve = configureCurve(new ECCurve.F2m(
208                 163,
209                 1, 2, 8,
210                 fromHex("0108B39E77C4B108BED981ED0E890E117C511CF072"),
211                 fromHex("0667ACEB38AF4E488C407433FFAE4F1C811638DF20"),
212                 n, h));
213 
214             X9ECPoint G = configureBasepoint(curve,
215                 "030024266E4EB5106D0A964D92C4860E2671DB9B6CC5");
216 
217             return new X9ECParameters(curve, G, n, h);
218         }
219     };
220 
221     static X9ECParametersHolder c2pnb163v3 = new X9ECParametersHolder()
222     {
223         protected X9ECParameters createParameters()
224         {
225             BigInteger n = fromHex("03FFFFFFFFFFFFFFFFFFFE1AEE140F110AFF961309");
226             BigInteger h = BigInteger.valueOf(2);
227 
228             ECCurve curve = configureCurve(new ECCurve.F2m(
229                 163,
230                 1, 2, 8,
231                 fromHex("07A526C63D3E25A256A007699F5447E32AE456B50E"),
232                 fromHex("03F7061798EB99E238FD6F1BF95B48FEEB4854252B"),
233                 n, h));
234 
235             X9ECPoint G = configureBasepoint(curve,
236                 "0202F9F87B7C574D0BDECF8A22E6524775F98CDEBDCB");
237 
238             return new X9ECParameters(curve, G, n, h);
239         }
240     };
241 
242     static X9ECParametersHolder c2pnb176w1 = new X9ECParametersHolder()
243     {
244         protected X9ECParameters createParameters()
245         {
246             BigInteger n = fromHex("010092537397ECA4F6145799D62B0A19CE06FE26AD");
247             BigInteger h = BigInteger.valueOf(0xFF6E);
248 
249             ECCurve curve = configureCurve(new ECCurve.F2m(
250                 176,
251                 1, 2, 43,
252                 fromHex("E4E6DB2995065C407D9D39B8D0967B96704BA8E9C90B"),
253                 fromHex("5DDA470ABE6414DE8EC133AE28E9BBD7FCEC0AE0FFF2"),
254                 n, h));
255 
256             X9ECPoint G = configureBasepoint(curve,
257                 "038D16C2866798B600F9F08BB4A8E860F3298CE04A5798");
258 
259             return new X9ECParameters(curve, G, n, h);
260         }
261     };
262 
263     static X9ECParametersHolder c2tnb191v1 = new X9ECParametersHolder()
264     {
265         protected X9ECParameters createParameters()
266         {
267             BigInteger n = fromHex("40000000000000000000000004A20E90C39067C893BBB9A5");
268             BigInteger h = BigInteger.valueOf(2);
269 
270             ECCurve curve = configureCurve(new ECCurve.F2m(
271                 191,
272                 9,
273                 fromHex("2866537B676752636A68F56554E12640276B649EF7526267"),
274                 fromHex("2E45EF571F00786F67B0081B9495A3D95462F5DE0AA185EC"),
275                 n, h));
276 
277             X9ECPoint G = configureBasepoint(curve,
278                 "0236B3DAF8A23206F9C4F299D7B21A9C369137F2C84AE1AA0D");
279 
280             return new X9ECParameters(curve, G, n, h, Hex.decodeStrict("4E13CA542744D696E67687561517552F279A8C84"));
281         }
282     };
283 
284     static X9ECParametersHolder c2tnb191v2 = new X9ECParametersHolder()
285     {
286         protected X9ECParameters createParameters()
287         {
288             BigInteger n = fromHex("20000000000000000000000050508CB89F652824E06B8173");
289             BigInteger h = BigInteger.valueOf(4);
290 
291             ECCurve curve = configureCurve(new ECCurve.F2m(
292                 191,
293                 9,
294                 fromHex("401028774D7777C7B7666D1366EA432071274F89FF01E718"),
295                 fromHex("0620048D28BCBD03B6249C99182B7C8CD19700C362C46A01"),
296                 n, h));
297 
298             X9ECPoint G = configureBasepoint(curve,
299                 "023809B2B7CC1B28CC5A87926AAD83FD28789E81E2C9E3BF10");
300 
301             return new X9ECParameters(curve, G, n, h);
302         }
303     };
304 
305     static X9ECParametersHolder c2tnb191v3 = new X9ECParametersHolder()
306     {
307         protected X9ECParameters createParameters()
308         {
309             BigInteger n = fromHex("155555555555555555555555610C0B196812BFB6288A3EA3");
310             BigInteger h = BigInteger.valueOf(6);
311 
312             ECCurve curve = configureCurve(new ECCurve.F2m(
313                 191,
314                 9,
315                 fromHex("6C01074756099122221056911C77D77E77A777E7E7E77FCB"),
316                 fromHex("71FE1AF926CF847989EFEF8DB459F66394D90F32AD3F15E8"),
317                 n, h));
318 
319             X9ECPoint G = configureBasepoint(curve,
320                 "03375D4CE24FDE434489DE8746E71786015009E66E38A926DD");
321 
322             return new X9ECParameters(curve, G, n, h);
323         }
324     };
325 
326     static X9ECParametersHolder c2pnb208w1 = new X9ECParametersHolder()
327     {
328         protected X9ECParameters createParameters()
329         {
330             BigInteger n = fromHex("0101BAF95C9723C57B6C21DA2EFF2D5ED588BDD5717E212F9D");
331             BigInteger h = BigInteger.valueOf(0xFE48);
332 
333             ECCurve curve = configureCurve(new ECCurve.F2m(
334                 208,
335                 1, 2, 83,
336                 BigInteger.valueOf(0),
337                 fromHex("C8619ED45A62E6212E1160349E2BFA844439FAFC2A3FD1638F9E"),
338                 n, h));
339 
340             X9ECPoint G = configureBasepoint(curve,
341                 "0289FDFBE4ABE193DF9559ECF07AC0CE78554E2784EB8C1ED1A57A");
342 
343             return new X9ECParameters(curve, G, n, h);
344         }
345     };
346 
347     static X9ECParametersHolder c2tnb239v1 = new X9ECParametersHolder()
348     {
349         protected X9ECParameters createParameters()
350         {
351             BigInteger n = fromHex("2000000000000000000000000000000F4D42FFE1492A4993F1CAD666E447");
352             BigInteger h = BigInteger.valueOf(4);
353 
354             ECCurve curve = configureCurve(new ECCurve.F2m(
355                 239,
356                 36,
357                 fromHex("32010857077C5431123A46B808906756F543423E8D27877578125778AC76"),
358                 fromHex("790408F2EEDAF392B012EDEFB3392F30F4327C0CA3F31FC383C422AA8C16"),
359                 n, h));
360 
361             X9ECPoint G = configureBasepoint(curve,
362                 "0257927098FA932E7C0A96D3FD5B706EF7E5F5C156E16B7E7C86038552E91D");
363 
364             return new X9ECParameters(curve, G, n, h);
365         }
366     };
367 
368     static X9ECParametersHolder c2tnb239v2 = new X9ECParametersHolder()
369     {
370         protected X9ECParameters createParameters()
371         {
372             BigInteger n = fromHex("1555555555555555555555555555553C6F2885259C31E3FCDF154624522D");
373             BigInteger h = BigInteger.valueOf(6);
374 
375             ECCurve curve = configureCurve(new ECCurve.F2m(
376                 239,
377                 36,
378                 fromHex("4230017757A767FAE42398569B746325D45313AF0766266479B75654E65F"),
379                 fromHex("5037EA654196CFF0CD82B2C14A2FCF2E3FF8775285B545722F03EACDB74B"),
380                 n, h));
381 
382             X9ECPoint G = configureBasepoint(curve,
383                 "0228F9D04E900069C8DC47A08534FE76D2B900B7D7EF31F5709F200C4CA205");
384 
385             return new X9ECParameters(curve, G, n, h);
386         }
387     };
388 
389     static X9ECParametersHolder c2tnb239v3 = new X9ECParametersHolder()
390     {
391         protected X9ECParameters createParameters()
392         {
393             BigInteger n = fromHex("0CCCCCCCCCCCCCCCCCCCCCCCCCCCCCAC4912D2D9DF903EF9888B8A0E4CFF");
394             BigInteger h = BigInteger.valueOf(10);
395 
396             ECCurve curve = configureCurve(new ECCurve.F2m(
397                 239,
398                 36,
399                 fromHex("01238774666A67766D6676F778E676B66999176666E687666D8766C66A9F"),
400                 fromHex("6A941977BA9F6A435199ACFC51067ED587F519C5ECB541B8E44111DE1D40"),
401                 n, h));
402 
403             X9ECPoint G = configureBasepoint(curve,
404                 "0370F6E9D04D289C4E89913CE3530BFDE903977D42B146D539BF1BDE4E9C92");
405 
406             return new X9ECParameters(curve, G, n, h);
407         }
408     };
409 
410     static X9ECParametersHolder c2pnb272w1 = new X9ECParametersHolder()
411     {
412         protected X9ECParameters createParameters()
413         {
414             BigInteger n = fromHex("0100FAF51354E0E39E4892DF6E319C72C8161603FA45AA7B998A167B8F1E629521");
415             BigInteger h = BigInteger.valueOf(0xFF06);
416 
417             ECCurve curve = configureCurve(new ECCurve.F2m(
418                 272,
419                 1, 3, 56,
420                 fromHex("91A091F03B5FBA4AB2CCF49C4EDD220FB028712D42BE752B2C40094DBACDB586FB20"),
421                 fromHex("7167EFC92BB2E3CE7C8AAAFF34E12A9C557003D7C73A6FAF003F99F6CC8482E540F7"),
422                 n, h));
423 
424             X9ECPoint G = configureBasepoint(curve,
425                 "026108BABB2CEEBCF787058A056CBE0CFE622D7723A289E08A07AE13EF0D10D171DD8D");
426 
427             return new X9ECParameters(curve, G, n, h);
428         }
429     };
430 
431     static X9ECParametersHolder c2pnb304w1 = new X9ECParametersHolder()
432     {
433         protected X9ECParameters createParameters()
434         {
435             BigInteger n = fromHex("0101D556572AABAC800101D556572AABAC8001022D5C91DD173F8FB561DA6899164443051D");
436             BigInteger h = BigInteger.valueOf(0xFE2E);
437 
438             ECCurve curve = configureCurve(new ECCurve.F2m(
439                 304,
440                 1, 2, 11,
441                 fromHex("FD0D693149A118F651E6DCE6802085377E5F882D1B510B44160074C1288078365A0396C8E681"),
442                 fromHex("BDDB97E555A50A908E43B01C798EA5DAA6788F1EA2794EFCF57166B8C14039601E55827340BE"),
443                 n, h));
444 
445             X9ECPoint G = configureBasepoint(curve,
446                 "02197B07845E9BE2D96ADB0F5F3C7F2CFFBD7A3EB8B6FEC35C7FD67F26DDF6285A644F740A2614");
447 
448             return new X9ECParameters(curve, G, n, h);
449         }
450     };
451 
452     static X9ECParametersHolder c2tnb359v1 = new X9ECParametersHolder()
453     {
454         protected X9ECParameters createParameters()
455         {
456             BigInteger n = fromHex("01AF286BCA1AF286BCA1AF286BCA1AF286BCA1AF286BC9FB8F6B85C556892C20A7EB964FE7719E74F490758D3B");
457             BigInteger h = BigInteger.valueOf(0x4C);
458 
459             ECCurve curve = configureCurve(new ECCurve.F2m(
460                 359,
461                 68,
462                 fromHex("5667676A654B20754F356EA92017D946567C46675556F19556A04616B567D223A5E05656FB549016A96656A557"),
463                 fromHex("2472E2D0197C49363F1FE7F5B6DB075D52B6947D135D8CA445805D39BC345626089687742B6329E70680231988"),
464                 n, h));
465 
466             X9ECPoint G = configureBasepoint(curve,
467                 "033C258EF3047767E7EDE0F1FDAA79DAEE3841366A132E163ACED4ED2401DF9C6BDCDE98E8E707C07A2239B1B097");
468 
469             return new X9ECParameters(curve, G, n, h);
470         }
471     };
472 
473     static X9ECParametersHolder c2pnb368w1 = new X9ECParametersHolder()
474     {
475         protected X9ECParameters createParameters()
476         {
477             BigInteger n = fromHex("010090512DA9AF72B08349D98A5DD4C7B0532ECA51CE03E2D10F3B7AC579BD87E909AE40A6F131E9CFCE5BD967");
478             BigInteger h = BigInteger.valueOf(0xFF70);
479 
480             ECCurve curve = configureCurve(new ECCurve.F2m(
481                 368,
482                 1, 2, 85,
483                 fromHex("E0D2EE25095206F5E2A4F9ED229F1F256E79A0E2B455970D8D0D865BD94778C576D62F0AB7519CCD2A1A906AE30D"),
484                 fromHex("FC1217D4320A90452C760A58EDCD30C8DD069B3C34453837A34ED50CB54917E1C2112D84D164F444F8F74786046A"),
485                 n, h));
486 
487             X9ECPoint G = configureBasepoint(curve,
488                 "021085E2755381DCCCE3C1557AFA10C2F0C0C2825646C5B34A394CBCFA8BC16B22E7E789E927BE216F02E1FB136A5F");
489 
490             return new X9ECParameters(curve, G, n, h);
491         }
492     };
493 
494     static X9ECParametersHolder c2tnb431r1 = new X9ECParametersHolder()
495     {
496         protected X9ECParameters createParameters()
497         {
498             BigInteger n = fromHex("0340340340340340340340340340340340340340340340340340340323C313FAB50589703B5EC68D3587FEC60D161CC149C1AD4A91");
499             BigInteger h = BigInteger.valueOf(0x2760);
500 
501             ECCurve curve = configureCurve(new ECCurve.F2m(
502                 431,
503                 120,
504                 fromHex("1A827EF00DD6FC0E234CAF046C6A5D8A85395B236CC4AD2CF32A0CADBDC9DDF620B0EB9906D0957F6C6FEACD615468DF104DE296CD8F"),
505                 fromHex("10D9B4A3D9047D8B154359ABFB1B7F5485B04CEB868237DDC9DEDA982A679A5A919B626D4E50A8DD731B107A9962381FB5D807BF2618"),
506                 n, h));
507 
508             X9ECPoint G = configureBasepoint(curve,
509                 "02120FC05D3C67A99DE161D2F4092622FECA701BE4F50F4758714E8A87BBF2A658EF8C21E7C5EFE965361F6C2999C0C247B0DBD70CE6B7");
510 
511             return new X9ECParameters(curve, G, n, h);
512         }
513     };
514 
515 
516     static final Hashtable objIds = new Hashtable();
517     static final Hashtable curves = new Hashtable();
518     static final Hashtable names = new Hashtable();
519 
defineCurve(String name, ASN1ObjectIdentifier oid, X9ECParametersHolder holder)520     static void defineCurve(String name, ASN1ObjectIdentifier oid, X9ECParametersHolder holder)
521     {
522         objIds.put(name, oid);
523         names.put(oid, name);
524         curves.put(oid, holder);
525     }
526 
527     static
528     {
529         defineCurve("prime192v1", X9ObjectIdentifiers.prime192v1, prime192v1);
530         defineCurve("prime192v2", X9ObjectIdentifiers.prime192v2, prime192v2);
531         defineCurve("prime192v3", X9ObjectIdentifiers.prime192v3, prime192v3);
532         defineCurve("prime239v1", X9ObjectIdentifiers.prime239v1, prime239v1);
533         defineCurve("prime239v2", X9ObjectIdentifiers.prime239v2, prime239v2);
534         defineCurve("prime239v3", X9ObjectIdentifiers.prime239v3, prime239v3);
535         defineCurve("prime256v1", X9ObjectIdentifiers.prime256v1, prime256v1);
536         defineCurve("c2pnb163v1", X9ObjectIdentifiers.c2pnb163v1, c2pnb163v1);
537         defineCurve("c2pnb163v2", X9ObjectIdentifiers.c2pnb163v2, c2pnb163v2);
538         defineCurve("c2pnb163v3", X9ObjectIdentifiers.c2pnb163v3, c2pnb163v3);
539         defineCurve("c2pnb176w1", X9ObjectIdentifiers.c2pnb176w1, c2pnb176w1);
540         defineCurve("c2tnb191v1", X9ObjectIdentifiers.c2tnb191v1, c2tnb191v1);
541         defineCurve("c2tnb191v2", X9ObjectIdentifiers.c2tnb191v2, c2tnb191v2);
542         defineCurve("c2tnb191v3", X9ObjectIdentifiers.c2tnb191v3, c2tnb191v3);
543         defineCurve("c2pnb208w1", X9ObjectIdentifiers.c2pnb208w1, c2pnb208w1);
544         defineCurve("c2tnb239v1", X9ObjectIdentifiers.c2tnb239v1, c2tnb239v1);
545         defineCurve("c2tnb239v2", X9ObjectIdentifiers.c2tnb239v2, c2tnb239v2);
546         defineCurve("c2tnb239v3", X9ObjectIdentifiers.c2tnb239v3, c2tnb239v3);
547         defineCurve("c2pnb272w1", X9ObjectIdentifiers.c2pnb272w1, c2pnb272w1);
548         defineCurve("c2pnb304w1", X9ObjectIdentifiers.c2pnb304w1, c2pnb304w1);
549         defineCurve("c2tnb359v1", X9ObjectIdentifiers.c2tnb359v1, c2tnb359v1);
550         defineCurve("c2pnb368w1", X9ObjectIdentifiers.c2pnb368w1, c2pnb368w1);
551         defineCurve("c2tnb431r1", X9ObjectIdentifiers.c2tnb431r1, c2tnb431r1);
552     }
553 
getByName( String name)554     public static X9ECParameters getByName(
555         String name)
556     {
557         ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier)objIds.get(Strings.toLowerCase(name));
558 
559         if (oid != null)
560         {
561             return getByOID(oid);
562         }
563 
564         return null;
565     }
566 
567     /**
568      * return the X9ECParameters object for the named curve represented by
569      * the passed in object identifier. Null if the curve isn't present.
570      *
571      * @param oid an object identifier representing a named curve, if present.
572      */
getByOID( ASN1ObjectIdentifier oid)573     public static X9ECParameters getByOID(
574         ASN1ObjectIdentifier oid)
575     {
576         X9ECParametersHolder holder = (X9ECParametersHolder)curves.get(oid);
577 
578         if (holder != null)
579         {
580             return holder.getParameters();
581         }
582 
583         return null;
584     }
585 
586     /**
587      * return the object identifier signified by the passed in name. Null
588      * if there is no object identifier associated with name.
589      *
590      * @return the object identifier associated with name, if present.
591      */
getOID( String name)592     public static ASN1ObjectIdentifier getOID(
593         String name)
594     {
595         return (ASN1ObjectIdentifier)objIds.get(Strings.toLowerCase(name));
596     }
597 
598     /**
599      * return the named curve name represented by the given object identifier.
600      */
getName( ASN1ObjectIdentifier oid)601     public static String getName(
602         ASN1ObjectIdentifier oid)
603     {
604         return (String)names.get(oid);
605     }
606 
607     /**
608      * returns an enumeration containing the name strings for curves
609      * contained in this structure.
610      */
getNames()611     public static Enumeration getNames()
612     {
613         return objIds.keys();
614     }
615 }
616