1package org.bouncycastle.asn1.sec;
2
3import java.math.BigInteger;
4import java.util.Enumeration;
5import java.util.Hashtable;
6
7import org.bouncycastle.asn1.ASN1ObjectIdentifier;
8import org.bouncycastle.asn1.x9.X9ECParameters;
9import org.bouncycastle.asn1.x9.X9ECParametersHolder;
10import org.bouncycastle.math.ec.ECConstants;
11import org.bouncycastle.math.ec.ECCurve;
12import org.bouncycastle.math.ec.ECPoint;
13import org.bouncycastle.util.Strings;
14import org.bouncycastle.util.encoders.Hex;
15
16public class SECNamedCurves
17{
18    private static BigInteger fromHex(
19        String hex)
20    {
21        return new BigInteger(1, Hex.decode(hex));
22    }
23
24    /*
25     * secp112r1
26     */
27    static X9ECParametersHolder secp112r1 = new X9ECParametersHolder()
28    {
29        protected X9ECParameters createParameters()
30        {
31            // p = (2^128 - 3) / 76439
32            BigInteger p = fromHex("DB7C2ABF62E35E668076BEAD208B");
33            BigInteger a = fromHex("DB7C2ABF62E35E668076BEAD2088");
34            BigInteger b = fromHex("659EF8BA043916EEDE8911702B22");
35            byte[] S = Hex.decode("00F50B028E4D696E676875615175290472783FB1");
36            BigInteger n = fromHex("DB7C2ABF62E35E7628DFAC6561C5");
37            BigInteger h = BigInteger.valueOf(1);
38
39            ECCurve curve = new ECCurve.Fp(p, a, b);
40            //ECPoint G = curve.decodePoint(Hex.decode("02"
41            //+ "09487239995A5EE76B55F9C2F098"));
42            ECPoint G = curve.decodePoint(Hex.decode("04"
43                + "09487239995A5EE76B55F9C2F098"
44                + "A89CE5AF8724C0A23E0E0FF77500"));
45
46            return new X9ECParameters(curve, G, n, h, S);
47        }
48    };
49
50    /*
51     * secp112r2
52     */
53    static X9ECParametersHolder secp112r2 = new X9ECParametersHolder()
54    {
55        protected X9ECParameters createParameters()
56        {
57            // p = (2^128 - 3) / 76439
58            BigInteger p = fromHex("DB7C2ABF62E35E668076BEAD208B");
59            BigInteger a = fromHex("6127C24C05F38A0AAAF65C0EF02C");
60            BigInteger b = fromHex("51DEF1815DB5ED74FCC34C85D709");
61            byte[] S = Hex.decode("002757A1114D696E6768756151755316C05E0BD4");
62            BigInteger n = fromHex("36DF0AAFD8B8D7597CA10520D04B");
63            BigInteger h = BigInteger.valueOf(4);
64
65            ECCurve curve = new ECCurve.Fp(p, a, b);
66            //ECPoint G = curve.decodePoint(Hex.decode("03"
67            //+ "4BA30AB5E892B4E1649DD0928643"));
68            ECPoint G = curve.decodePoint(Hex.decode("04"
69                + "4BA30AB5E892B4E1649DD0928643"
70                + "ADCD46F5882E3747DEF36E956E97"));
71
72            return new X9ECParameters(curve, G, n, h, S);
73        }
74    };
75
76    /*
77     * secp128r1
78     */
79    static X9ECParametersHolder secp128r1 = new X9ECParametersHolder()
80    {
81        protected X9ECParameters createParameters()
82        {
83            // p = 2^128 - 2^97 - 1
84            BigInteger p = fromHex("FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF");
85            BigInteger a = fromHex("FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFC");
86            BigInteger b = fromHex("E87579C11079F43DD824993C2CEE5ED3");
87            byte[] S = Hex.decode("000E0D4D696E6768756151750CC03A4473D03679");
88            BigInteger n = fromHex("FFFFFFFE0000000075A30D1B9038A115");
89            BigInteger h = BigInteger.valueOf(1);
90
91            ECCurve curve = new ECCurve.Fp(p, a, b);
92            //ECPoint G = curve.decodePoint(Hex.decode("03"
93            //+ "161FF7528B899B2D0C28607CA52C5B86"));
94            ECPoint G = curve.decodePoint(Hex.decode("04"
95                + "161FF7528B899B2D0C28607CA52C5B86"
96                + "CF5AC8395BAFEB13C02DA292DDED7A83"));
97
98            return new X9ECParameters(curve, G, n, h, S);
99        }
100    };
101
102    /*
103     * secp128r2
104     */
105    static X9ECParametersHolder secp128r2 = new X9ECParametersHolder()
106    {
107        protected X9ECParameters createParameters()
108        {
109            // p = 2^128 - 2^97 - 1
110            BigInteger p = fromHex("FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF");
111            BigInteger a = fromHex("D6031998D1B3BBFEBF59CC9BBFF9AEE1");
112            BigInteger b = fromHex("5EEEFCA380D02919DC2C6558BB6D8A5D");
113            byte[] S = Hex.decode("004D696E67687561517512D8F03431FCE63B88F4");
114            BigInteger n = fromHex("3FFFFFFF7FFFFFFFBE0024720613B5A3");
115            BigInteger h = BigInteger.valueOf(4);
116
117            ECCurve curve = new ECCurve.Fp(p, a, b);
118            //ECPoint G = curve.decodePoint(Hex.decode("02"
119            //+ "7B6AA5D85E572983E6FB32A7CDEBC140"));
120            ECPoint G = curve.decodePoint(Hex.decode("04"
121                + "7B6AA5D85E572983E6FB32A7CDEBC140"
122                + "27B6916A894D3AEE7106FE805FC34B44"));
123
124            return new X9ECParameters(curve, G, n, h, S);
125        }
126    };
127
128    /*
129     * secp160k1
130     */
131    static X9ECParametersHolder secp160k1 = new X9ECParametersHolder()
132    {
133        protected X9ECParameters createParameters()
134        {
135            // p = 2^160 - 2^32 - 2^14 - 2^12 - 2^9 - 2^8 - 2^7 - 2^3 - 2^2 - 1
136            BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73");
137            BigInteger a = ECConstants.ZERO;
138            BigInteger b = BigInteger.valueOf(7);
139            byte[] S = null;
140            BigInteger n = fromHex("0100000000000000000001B8FA16DFAB9ACA16B6B3");
141            BigInteger h = BigInteger.valueOf(1);
142
143            ECCurve curve = new ECCurve.Fp(p, a, b);
144//            ECPoint G = curve.decodePoint(Hex.decode("02"
145//                + "3B4C382CE37AA192A4019E763036F4F5DD4D7EBB"));
146            ECPoint G = curve.decodePoint(Hex.decode("04"
147                + "3B4C382CE37AA192A4019E763036F4F5DD4D7EBB"
148                + "938CF935318FDCED6BC28286531733C3F03C4FEE"));
149
150            return new X9ECParameters(curve, G, n, h, S);
151        }
152    };
153
154    /*
155     * secp160r1
156     */
157    static X9ECParametersHolder secp160r1 = new X9ECParametersHolder()
158    {
159        protected X9ECParameters createParameters()
160        {
161            // p = 2^160 - 2^31 - 1
162            BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF");
163            BigInteger a = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC");
164            BigInteger b = fromHex("1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45");
165            byte[] S = Hex.decode("1053CDE42C14D696E67687561517533BF3F83345");
166            BigInteger n = fromHex("0100000000000000000001F4C8F927AED3CA752257");
167            BigInteger h = BigInteger.valueOf(1);
168
169            ECCurve curve = new ECCurve.Fp(p, a, b);
170            //ECPoint G = curve.decodePoint(Hex.decode("02"
171                //+ "4A96B5688EF573284664698968C38BB913CBFC82"));
172            ECPoint G = curve.decodePoint(Hex.decode("04"
173                + "4A96B5688EF573284664698968C38BB913CBFC82"
174                + "23A628553168947D59DCC912042351377AC5FB32"));
175
176            return new X9ECParameters(curve, G, n, h, S);
177        }
178    };
179
180    /*
181     * secp160r2
182     */
183    static X9ECParametersHolder secp160r2 = new X9ECParametersHolder()
184    {
185        protected X9ECParameters createParameters()
186        {
187            // p = 2^160 - 2^32 - 2^14 - 2^12 - 2^9 - 2^8 - 2^7 - 2^3 - 2^2 - 1
188            BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73");
189            BigInteger a = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC70");
190            BigInteger b = fromHex("B4E134D3FB59EB8BAB57274904664D5AF50388BA");
191            byte[] S = Hex.decode("B99B99B099B323E02709A4D696E6768756151751");
192            BigInteger n = fromHex("0100000000000000000000351EE786A818F3A1A16B");
193            BigInteger h = BigInteger.valueOf(1);
194
195            ECCurve curve = new ECCurve.Fp(p, a, b);
196            //ECPoint G = curve.decodePoint(Hex.decode("02"
197            //+ "52DCB034293A117E1F4FF11B30F7199D3144CE6D"));
198            ECPoint G = curve.decodePoint(Hex.decode("04"
199                + "52DCB034293A117E1F4FF11B30F7199D3144CE6D"
200                + "FEAFFEF2E331F296E071FA0DF9982CFEA7D43F2E"));
201
202            return new X9ECParameters(curve, G, n, h, S);
203        }
204    };
205
206    /*
207     * secp192k1
208     */
209    static X9ECParametersHolder secp192k1 = new X9ECParametersHolder()
210    {
211        protected X9ECParameters createParameters()
212        {
213            // p = 2^192 - 2^32 - 2^12 - 2^8 - 2^7 - 2^6 - 2^3 - 1
214            BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37");
215            BigInteger a = ECConstants.ZERO;
216            BigInteger b = BigInteger.valueOf(3);
217            byte[] S = null;
218            BigInteger n = fromHex("FFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D");
219            BigInteger h = BigInteger.valueOf(1);
220
221            ECCurve curve = new ECCurve.Fp(p, a, b);
222            //ECPoint G = curve.decodePoint(Hex.decode("03"
223            //+ "DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D"));
224            ECPoint G = curve.decodePoint(Hex.decode("04"
225                + "DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D"
226                + "9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D"));
227
228            return new X9ECParameters(curve, G, n, h, S);
229        }
230    };
231
232    /*
233     * secp192r1
234     */
235    static X9ECParametersHolder secp192r1 = new X9ECParametersHolder()
236    {
237        protected X9ECParameters createParameters()
238        {
239            // p = 2^192 - 2^64 - 1
240            BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF");
241            BigInteger a = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC");
242            BigInteger b = fromHex("64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1");
243            byte[] S = Hex.decode("3045AE6FC8422F64ED579528D38120EAE12196D5");
244            BigInteger n = fromHex("FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831");
245            BigInteger h = BigInteger.valueOf(1);
246
247            ECCurve curve = new ECCurve.Fp(p, a, b);
248            //ECPoint G = curve.decodePoint(Hex.decode("03"
249            //+ "188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012"));
250            ECPoint G = curve.decodePoint(Hex.decode("04"
251                + "188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012"
252                + "07192B95FFC8DA78631011ED6B24CDD573F977A11E794811"));
253
254            return new X9ECParameters(curve, G, n, h, S);
255        }
256    };
257
258    /*
259     * secp224k1
260     */
261    static X9ECParametersHolder secp224k1 = new X9ECParametersHolder()
262    {
263        protected X9ECParameters createParameters()
264        {
265            // p = 2^224 - 2^32 - 2^12 - 2^11 - 2^9 - 2^7 - 2^4 - 2 - 1
266            BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFE56D");
267            BigInteger a = ECConstants.ZERO;
268            BigInteger b = BigInteger.valueOf(5);
269            byte[] S = null;
270            BigInteger n = fromHex("010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7");
271            BigInteger h = BigInteger.valueOf(1);
272
273            ECCurve curve = new ECCurve.Fp(p, a, b);
274            //ECPoint G = curve.decodePoint(Hex.decode("03"
275            //+ "A1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C"));
276            ECPoint G = curve.decodePoint(Hex.decode("04"
277                + "A1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C"
278                + "7E089FED7FBA344282CAFBD6F7E319F7C0B0BD59E2CA4BDB556D61A5"));
279
280            return new X9ECParameters(curve, G, n, h, S);
281        }
282    };
283
284    /*
285     * secp224r1
286     */
287    static X9ECParametersHolder secp224r1 = new X9ECParametersHolder()
288    {
289        protected X9ECParameters createParameters()
290        {
291            // p = 2^224 - 2^96 + 1
292            BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001");
293            BigInteger a = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE");
294            BigInteger b = fromHex("B4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4");
295            byte[] S = Hex.decode("BD71344799D5C7FCDC45B59FA3B9AB8F6A948BC5");
296            BigInteger n = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D");
297            BigInteger h = BigInteger.valueOf(1);
298
299            ECCurve curve = new ECCurve.Fp(p, a, b);
300            //ECPoint G = curve.decodePoint(Hex.decode("02"
301            //+ "B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21"));
302            ECPoint G = curve.decodePoint(Hex.decode("04"
303                + "B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21"
304                + "BD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34"));
305
306            return new X9ECParameters(curve, G, n, h, S);
307        }
308    };
309
310    /*
311     * secp256k1
312     */
313    static X9ECParametersHolder secp256k1 = new X9ECParametersHolder()
314    {
315        protected X9ECParameters createParameters()
316        {
317            // p = 2^256 - 2^32 - 2^9 - 2^8 - 2^7 - 2^6 - 2^4 - 1
318            BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F");
319            BigInteger a = ECConstants.ZERO;
320            BigInteger b = BigInteger.valueOf(7);
321            byte[] S = null;
322            BigInteger n = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141");
323            BigInteger h = BigInteger.valueOf(1);
324
325            ECCurve curve = new ECCurve.Fp(p, a, b);
326            //ECPoint G = curve.decodePoint(Hex.decode("02"
327            //+ "79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798"));
328            ECPoint G = curve.decodePoint(Hex.decode("04"
329                + "79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798"
330                + "483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8"));
331
332            return new X9ECParameters(curve, G, n, h, S);
333        }
334    };
335
336    /*
337     * secp256r1
338     */
339    static X9ECParametersHolder secp256r1 = new X9ECParametersHolder()
340    {
341        protected X9ECParameters createParameters()
342        {
343            // p = 2^224 (2^32 - 1) + 2^192 + 2^96 - 1
344            BigInteger p = fromHex("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF");
345            BigInteger a = fromHex("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC");
346            BigInteger b = fromHex("5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B");
347            byte[] S = Hex.decode("C49D360886E704936A6678E1139D26B7819F7E90");
348            BigInteger n = fromHex("FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551");
349            BigInteger h = BigInteger.valueOf(1);
350
351            ECCurve curve = new ECCurve.Fp(p, a, b);
352            //ECPoint G = curve.decodePoint(Hex.decode("03"
353            //+ "6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296"));
354            ECPoint G = curve.decodePoint(Hex.decode("04"
355                + "6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296"
356                + "4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5"));
357
358            return new X9ECParameters(curve, G, n, h, S);
359        }
360    };
361
362    /*
363     * secp384r1
364     */
365    static X9ECParametersHolder secp384r1 = new X9ECParametersHolder()
366    {
367        protected X9ECParameters createParameters()
368        {
369            // p = 2^384 - 2^128 - 2^96 + 2^32 - 1
370            BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF");
371            BigInteger a = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC");
372            BigInteger b = fromHex("B3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF");
373            byte[] S = Hex.decode("A335926AA319A27A1D00896A6773A4827ACDAC73");
374            BigInteger n = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973");
375            BigInteger h = BigInteger.valueOf(1);
376
377            ECCurve curve = new ECCurve.Fp(p, a, b);
378            //ECPoint G = curve.decodePoint(Hex.decode("03"
379            //+ "AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB7"));
380            ECPoint G = curve.decodePoint(Hex.decode("04"
381                + "AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB7"
382                + "3617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A147CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F"));
383
384            return new X9ECParameters(curve, G, n, h, S);
385        }
386    };
387
388    /*
389     * secp521r1
390     */
391    static X9ECParametersHolder secp521r1 = new X9ECParametersHolder()
392    {
393        protected X9ECParameters createParameters()
394        {
395            // p = 2^521 - 1
396            BigInteger p = fromHex("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF");
397            BigInteger a = fromHex("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC");
398            BigInteger b = fromHex("0051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00");
399            byte[] S = Hex.decode("D09E8800291CB85396CC6717393284AAA0DA64BA");
400            BigInteger n = fromHex("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409");
401            BigInteger h = BigInteger.valueOf(1);
402
403            ECCurve curve = new ECCurve.Fp(p, a, b);
404            //ECPoint G = curve.decodePoint(Hex.decode("02"
405            //+ "00C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66"));
406            ECPoint G = curve.decodePoint(Hex.decode("04"
407                + "00C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66"
408                + "011839296A789A3BC0045C8A5FB42C7D1BD998F54449579B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C7086A272C24088BE94769FD16650"));
409
410            return new X9ECParameters(curve, G, n, h, S);
411        }
412    };
413
414    /*
415     * sect113r1
416     */
417    static X9ECParametersHolder sect113r1 = new X9ECParametersHolder()
418    {
419        protected X9ECParameters createParameters()
420        {
421            int m = 113;
422            int k = 9;
423
424            BigInteger a = fromHex("003088250CA6E7C7FE649CE85820F7");
425            BigInteger b = fromHex("00E8BEE4D3E2260744188BE0E9C723");
426            byte[] S = Hex.decode("10E723AB14D696E6768756151756FEBF8FCB49A9");
427            BigInteger n = fromHex("0100000000000000D9CCEC8A39E56F");
428            BigInteger h = BigInteger.valueOf(2);
429
430            ECCurve curve = new ECCurve.F2m(m, k, a, b, n, h);
431            //ECPoint G = curve.decodePoint(Hex.decode("03"
432            //+ "009D73616F35F4AB1407D73562C10F"));
433            ECPoint G = curve.decodePoint(Hex.decode("04"
434                + "009D73616F35F4AB1407D73562C10F"
435                + "00A52830277958EE84D1315ED31886"));
436
437            return new X9ECParameters(curve, G, n, h, S);
438        }
439    };
440
441    /*
442     * sect113r2
443     */
444    static X9ECParametersHolder sect113r2 = new X9ECParametersHolder()
445    {
446        protected X9ECParameters createParameters()
447        {
448            int m = 113;
449            int k = 9;
450
451            BigInteger a = fromHex("00689918DBEC7E5A0DD6DFC0AA55C7");
452            BigInteger b = fromHex("0095E9A9EC9B297BD4BF36E059184F");
453            byte[] S = Hex.decode("10C0FB15760860DEF1EEF4D696E676875615175D");
454            BigInteger n = fromHex("010000000000000108789B2496AF93");
455            BigInteger h = BigInteger.valueOf(2);
456
457            ECCurve curve = new ECCurve.F2m(m, k, a, b, n, h);
458            //ECPoint G = curve.decodePoint(Hex.decode("03"
459            //+ "01A57A6A7B26CA5EF52FCDB8164797"));
460            ECPoint G = curve.decodePoint(Hex.decode("04"
461                + "01A57A6A7B26CA5EF52FCDB8164797"
462                + "00B3ADC94ED1FE674C06E695BABA1D"));
463
464            return new X9ECParameters(curve, G, n, h, S);
465        }
466    };
467
468    /*
469     * sect131r1
470     */
471    static X9ECParametersHolder sect131r1 = new X9ECParametersHolder()
472    {
473        protected X9ECParameters createParameters()
474        {
475            int m = 131;
476            int k1 = 2;
477            int k2 = 3;
478            int k3 = 8;
479
480            BigInteger a = fromHex("07A11B09A76B562144418FF3FF8C2570B8");
481            BigInteger b = fromHex("0217C05610884B63B9C6C7291678F9D341");
482            byte[] S = Hex.decode("4D696E676875615175985BD3ADBADA21B43A97E2");
483            BigInteger n = fromHex("0400000000000000023123953A9464B54D");
484            BigInteger h = BigInteger.valueOf(2);
485
486            ECCurve curve = new ECCurve.F2m(m, k1, k2, k3, a, b, n, h);
487            //ECPoint G = curve.decodePoint(Hex.decode("03"
488            //+ "0081BAF91FDF9833C40F9C181343638399"));
489            ECPoint G = curve.decodePoint(Hex.decode("04"
490                + "0081BAF91FDF9833C40F9C181343638399"
491                + "078C6E7EA38C001F73C8134B1B4EF9E150"));
492
493            return new X9ECParameters(curve, G, n, h, S);
494        }
495    };
496
497    /*
498     * sect131r2
499     */
500    static X9ECParametersHolder sect131r2 = new X9ECParametersHolder()
501    {
502        protected X9ECParameters createParameters()
503        {
504            int m = 131;
505            int k1 = 2;
506            int k2 = 3;
507            int k3 = 8;
508
509            BigInteger a = fromHex("03E5A88919D7CAFCBF415F07C2176573B2");
510            BigInteger b = fromHex("04B8266A46C55657AC734CE38F018F2192");
511            byte[] S = Hex.decode("985BD3ADBAD4D696E676875615175A21B43A97E3");
512            BigInteger n = fromHex("0400000000000000016954A233049BA98F");
513            BigInteger h = BigInteger.valueOf(2);
514
515            ECCurve curve = new ECCurve.F2m(m, k1, k2, k3, a, b, n, h);
516            //ECPoint G = curve.decodePoint(Hex.decode("03"
517            //+ "0356DCD8F2F95031AD652D23951BB366A8"));
518            ECPoint G = curve.decodePoint(Hex.decode("04"
519                + "0356DCD8F2F95031AD652D23951BB366A8"
520                + "0648F06D867940A5366D9E265DE9EB240F"));
521
522            return new X9ECParameters(curve, G, n, h, S);
523        }
524    };
525
526    /*
527     * sect163k1
528     */
529    static X9ECParametersHolder sect163k1 = new X9ECParametersHolder()
530    {
531        protected X9ECParameters createParameters()
532        {
533            int m = 163;
534            int k1 = 3;
535            int k2 = 6;
536            int k3 = 7;
537
538            BigInteger a = BigInteger.valueOf(1);
539            BigInteger b = BigInteger.valueOf(1);
540            byte[] S = null;
541            BigInteger n = fromHex("04000000000000000000020108A2E0CC0D99F8A5EF");
542            BigInteger h = BigInteger.valueOf(2);
543
544            ECCurve curve = new ECCurve.F2m(m, k1, k2, k3, a, b, n, h);
545            //ECPoint G = curve.decodePoint(Hex.decode("03"
546            //+ "02FE13C0537BBC11ACAA07D793DE4E6D5E5C94EEE8"));
547            ECPoint G = curve.decodePoint(Hex.decode("04"
548                + "02FE13C0537BBC11ACAA07D793DE4E6D5E5C94EEE8"
549                + "0289070FB05D38FF58321F2E800536D538CCDAA3D9"));
550
551            return new X9ECParameters(curve, G, n, h, S);
552        }
553    };
554
555    /*
556     * sect163r1
557     */
558    static X9ECParametersHolder sect163r1 = new X9ECParametersHolder()
559    {
560        protected X9ECParameters createParameters()
561        {
562            int m = 163;
563            int k1 = 3;
564            int k2 = 6;
565            int k3 = 7;
566
567            BigInteger a = fromHex("07B6882CAAEFA84F9554FF8428BD88E246D2782AE2");
568            BigInteger b = fromHex("0713612DCDDCB40AAB946BDA29CA91F73AF958AFD9");
569            byte[] S = Hex.decode("24B7B137C8A14D696E6768756151756FD0DA2E5C");
570            BigInteger n = fromHex("03FFFFFFFFFFFFFFFFFFFF48AAB689C29CA710279B");
571            BigInteger h = BigInteger.valueOf(2);
572
573            ECCurve curve = new ECCurve.F2m(m, k1, k2, k3, a, b, n, h);
574            //ECPoint G = curve.decodePoint(Hex.decode("03"
575            //+ "0369979697AB43897789566789567F787A7876A654"));
576            ECPoint G = curve.decodePoint(Hex.decode("04"
577                + "0369979697AB43897789566789567F787A7876A654"
578                + "00435EDB42EFAFB2989D51FEFCE3C80988F41FF883"));
579
580            return new X9ECParameters(curve, G, n, h, S);
581        }
582    };
583
584    /*
585     * sect163r2
586     */
587    static X9ECParametersHolder sect163r2 = new X9ECParametersHolder()
588    {
589        protected X9ECParameters createParameters()
590        {
591            int m = 163;
592            int k1 = 3;
593            int k2 = 6;
594            int k3 = 7;
595
596            BigInteger a = BigInteger.valueOf(1);
597            BigInteger b = fromHex("020A601907B8C953CA1481EB10512F78744A3205FD");
598            byte[] S = Hex.decode("85E25BFE5C86226CDB12016F7553F9D0E693A268");
599            BigInteger n = fromHex("040000000000000000000292FE77E70C12A4234C33");
600            BigInteger h = BigInteger.valueOf(2);
601
602            ECCurve curve = new ECCurve.F2m(m, k1, k2, k3, a, b, n, h);
603            //ECPoint G = curve.decodePoint(Hex.decode("03"
604            //+ "03F0EBA16286A2D57EA0991168D4994637E8343E36"));
605            ECPoint G = curve.decodePoint(Hex.decode("04"
606                + "03F0EBA16286A2D57EA0991168D4994637E8343E36"
607                + "00D51FBC6C71A0094FA2CDD545B11C5C0C797324F1"));
608
609            return new X9ECParameters(curve, G, n, h, S);
610        }
611    };
612
613    /*
614     * sect193r1
615     */
616    static X9ECParametersHolder sect193r1 = new X9ECParametersHolder()
617    {
618        protected X9ECParameters createParameters()
619        {
620            int m = 193;
621            int k = 15;
622
623            BigInteger a = fromHex("0017858FEB7A98975169E171F77B4087DE098AC8A911DF7B01");
624            BigInteger b = fromHex("00FDFB49BFE6C3A89FACADAA7A1E5BBC7CC1C2E5D831478814");
625            byte[] S = Hex.decode("103FAEC74D696E676875615175777FC5B191EF30");
626            BigInteger n = fromHex("01000000000000000000000000C7F34A778F443ACC920EBA49");
627            BigInteger h = BigInteger.valueOf(2);
628
629            ECCurve curve = new ECCurve.F2m(m, k, a, b, n, h);
630            //ECPoint G = curve.decodePoint(Hex.decode("03"
631            //+ "01F481BC5F0FF84A74AD6CDF6FDEF4BF6179625372D8C0C5E1"));
632            ECPoint G = curve.decodePoint(Hex.decode("04"
633                + "01F481BC5F0FF84A74AD6CDF6FDEF4BF6179625372D8C0C5E1"
634                + "0025E399F2903712CCF3EA9E3A1AD17FB0B3201B6AF7CE1B05"));
635
636            return new X9ECParameters(curve, G, n, h, S);
637        }
638    };
639
640    /*
641     * sect193r2
642     */
643    static X9ECParametersHolder sect193r2 = new X9ECParametersHolder()
644    {
645        protected X9ECParameters createParameters()
646        {
647            int m = 193;
648            int k = 15;
649
650            BigInteger a = fromHex("0163F35A5137C2CE3EA6ED8667190B0BC43ECD69977702709B");
651            BigInteger b = fromHex("00C9BB9E8927D4D64C377E2AB2856A5B16E3EFB7F61D4316AE");
652            byte[] S = Hex.decode("10B7B4D696E676875615175137C8A16FD0DA2211");
653            BigInteger n = fromHex("010000000000000000000000015AAB561B005413CCD4EE99D5");
654            BigInteger h = BigInteger.valueOf(2);
655
656            ECCurve curve = new ECCurve.F2m(m, k, a, b, n, h);
657            //ECPoint G = curve.decodePoint(Hex.decode("03"
658            //+ "00D9B67D192E0367C803F39E1A7E82CA14A651350AAE617E8F"));
659            ECPoint G = curve.decodePoint(Hex.decode("04"
660                + "00D9B67D192E0367C803F39E1A7E82CA14A651350AAE617E8F"
661                + "01CE94335607C304AC29E7DEFBD9CA01F596F927224CDECF6C"));
662
663            return new X9ECParameters(curve, G, n, h, S);
664        }
665    };
666
667    /*
668     * sect233k1
669     */
670    static X9ECParametersHolder sect233k1 = new X9ECParametersHolder()
671    {
672        protected X9ECParameters createParameters()
673        {
674            int m = 233;
675            int k = 74;
676
677            BigInteger a = ECConstants.ZERO;
678            BigInteger b = BigInteger.valueOf(1);
679            byte[] S = null;
680            BigInteger n = fromHex("8000000000000000000000000000069D5BB915BCD46EFB1AD5F173ABDF");
681            BigInteger h = BigInteger.valueOf(4);
682
683            ECCurve curve = new ECCurve.F2m(m, k, a, b, n, h);
684            //ECPoint G = curve.decodePoint(Hex.decode("02"
685            //+ "017232BA853A7E731AF129F22FF4149563A419C26BF50A4C9D6EEFAD6126"));
686            ECPoint G = curve.decodePoint(Hex.decode("04"
687                + "017232BA853A7E731AF129F22FF4149563A419C26BF50A4C9D6EEFAD6126"
688                + "01DB537DECE819B7F70F555A67C427A8CD9BF18AEB9B56E0C11056FAE6A3"));
689
690            return new X9ECParameters(curve, G, n, h, S);
691        }
692    };
693
694    /*
695     * sect233r1
696     */
697    static X9ECParametersHolder sect233r1 = new X9ECParametersHolder()
698    {
699        protected X9ECParameters createParameters()
700        {
701            int m = 233;
702            int k = 74;
703
704            BigInteger a = BigInteger.valueOf(1);
705            BigInteger b = fromHex("0066647EDE6C332C7F8C0923BB58213B333B20E9CE4281FE115F7D8F90AD");
706            byte[] S = Hex.decode("74D59FF07F6B413D0EA14B344B20A2DB049B50C3");
707            BigInteger n = fromHex("01000000000000000000000000000013E974E72F8A6922031D2603CFE0D7");
708            BigInteger h = BigInteger.valueOf(2);
709
710            ECCurve curve = new ECCurve.F2m(m, k, a, b, n, h);
711            //ECPoint G = curve.decodePoint(Hex.decode("03"
712            //+ "00FAC9DFCBAC8313BB2139F1BB755FEF65BC391F8B36F8F8EB7371FD558B"));
713            ECPoint G = curve.decodePoint(Hex.decode("04"
714                + "00FAC9DFCBAC8313BB2139F1BB755FEF65BC391F8B36F8F8EB7371FD558B"
715                + "01006A08A41903350678E58528BEBF8A0BEFF867A7CA36716F7E01F81052"));
716
717            return new X9ECParameters(curve, G, n, h, S);
718        }
719    };
720
721    /*
722     * sect239k1
723     */
724    static X9ECParametersHolder sect239k1 = new X9ECParametersHolder()
725    {
726        protected X9ECParameters createParameters()
727        {
728            int m = 239;
729            int k = 158;
730
731            BigInteger a = ECConstants.ZERO;
732            BigInteger b = BigInteger.valueOf(1);
733            byte[] S = null;
734            BigInteger n = fromHex("2000000000000000000000000000005A79FEC67CB6E91F1C1DA800E478A5");
735            BigInteger h = BigInteger.valueOf(4);
736
737            ECCurve curve = new ECCurve.F2m(m, k, a, b, n, h);
738            //ECPoint G = curve.decodePoint(Hex.decode("03"
739            //+ "29A0B6A887A983E9730988A68727A8B2D126C44CC2CC7B2A6555193035DC"));
740            ECPoint G = curve.decodePoint(Hex.decode("04"
741                + "29A0B6A887A983E9730988A68727A8B2D126C44CC2CC7B2A6555193035DC"
742                + "76310804F12E549BDB011C103089E73510ACB275FC312A5DC6B76553F0CA"));
743
744            return new X9ECParameters(curve, G, n, h, S);
745        }
746    };
747
748    /*
749     * sect283k1
750     */
751    static X9ECParametersHolder sect283k1 = new X9ECParametersHolder()
752    {
753        protected X9ECParameters createParameters()
754        {
755            int m = 283;
756            int k1 = 5;
757            int k2 = 7;
758            int k3 = 12;
759
760            BigInteger a = ECConstants.ZERO;
761            BigInteger b = BigInteger.valueOf(1);
762            byte[] S = null;
763            BigInteger n = fromHex("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE9AE2ED07577265DFF7F94451E061E163C61");
764            BigInteger h = BigInteger.valueOf(4);
765
766            ECCurve curve = new ECCurve.F2m(m, k1, k2, k3, a, b, n, h);
767            //ECPoint G = curve.decodePoint(Hex.decode("02"
768            //+ "0503213F78CA44883F1A3B8162F188E553CD265F23C1567A16876913B0C2AC2458492836"));
769            ECPoint G = curve.decodePoint(Hex.decode("04"
770                + "0503213F78CA44883F1A3B8162F188E553CD265F23C1567A16876913B0C2AC2458492836"
771                + "01CCDA380F1C9E318D90F95D07E5426FE87E45C0E8184698E45962364E34116177DD2259"));
772
773            return new X9ECParameters(curve, G, n, h, S);
774        }
775    };
776
777    /*
778     * sect283r1
779     */
780    static X9ECParametersHolder sect283r1 = new X9ECParametersHolder()
781    {
782        protected X9ECParameters createParameters()
783        {
784            int m = 283;
785            int k1 = 5;
786            int k2 = 7;
787            int k3 = 12;
788
789            BigInteger a = BigInteger.valueOf(1);
790            BigInteger b = fromHex("027B680AC8B8596DA5A4AF8A19A0303FCA97FD7645309FA2A581485AF6263E313B79A2F5");
791            byte[] S = Hex.decode("77E2B07370EB0F832A6DD5B62DFC88CD06BB84BE");
792            BigInteger n = fromHex("03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEF90399660FC938A90165B042A7CEFADB307");
793            BigInteger h = BigInteger.valueOf(2);
794
795            ECCurve curve = new ECCurve.F2m(m, k1, k2, k3, a, b, n, h);
796            //ECPoint G = curve.decodePoint(Hex.decode("03"
797            //+ "05F939258DB7DD90E1934F8C70B0DFEC2EED25B8557EAC9C80E2E198F8CDBECD86B12053"));
798            ECPoint G = curve.decodePoint(Hex.decode("04"
799                + "05F939258DB7DD90E1934F8C70B0DFEC2EED25B8557EAC9C80E2E198F8CDBECD86B12053"
800                + "03676854FE24141CB98FE6D4B20D02B4516FF702350EDDB0826779C813F0DF45BE8112F4"));
801
802            return new X9ECParameters(curve, G, n, h, S);
803        }
804    };
805
806    /*
807     * sect409k1
808     */
809    static X9ECParametersHolder sect409k1 = new X9ECParametersHolder()
810    {
811        protected X9ECParameters createParameters()
812        {
813            int m = 409;
814            int k = 87;
815
816            BigInteger a = ECConstants.ZERO;
817            BigInteger b = BigInteger.valueOf(1);
818            byte[] S = null;
819            BigInteger n = fromHex("7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE5F83B2D4EA20400EC4557D5ED3E3E7CA5B4B5C83B8E01E5FCF");
820            BigInteger h = BigInteger.valueOf(4);
821
822            ECCurve curve = new ECCurve.F2m(m, k, a, b, n, h);
823            //ECPoint G = curve.decodePoint(Hex.decode("03"
824            //+ "0060F05F658F49C1AD3AB1890F7184210EFD0987E307C84C27ACCFB8F9F67CC2C460189EB5AAAA62EE222EB1B35540CFE9023746"));
825            ECPoint G = curve.decodePoint(Hex.decode("04"
826                + "0060F05F658F49C1AD3AB1890F7184210EFD0987E307C84C27ACCFB8F9F67CC2C460189EB5AAAA62EE222EB1B35540CFE9023746"
827                + "01E369050B7C4E42ACBA1DACBF04299C3460782F918EA427E6325165E9EA10E3DA5F6C42E9C55215AA9CA27A5863EC48D8E0286B"));
828
829            return new X9ECParameters(curve, G, n, h, S);
830        }
831    };
832
833    /*
834     * sect409r1
835     */
836    static X9ECParametersHolder sect409r1 = new X9ECParametersHolder()
837    {
838        protected X9ECParameters createParameters()
839        {
840            int m = 409;
841            int k = 87;
842
843            BigInteger a = BigInteger.valueOf(1);
844            BigInteger b = fromHex("0021A5C2C8EE9FEB5C4B9A753B7B476B7FD6422EF1F3DD674761FA99D6AC27C8A9A197B272822F6CD57A55AA4F50AE317B13545F");
845            byte[] S = Hex.decode("4099B5A457F9D69F79213D094C4BCD4D4262210B");
846            BigInteger n = fromHex("010000000000000000000000000000000000000000000000000001E2AAD6A612F33307BE5FA47C3C9E052F838164CD37D9A21173");
847            BigInteger h = BigInteger.valueOf(2);
848
849            ECCurve curve = new ECCurve.F2m(m, k, a, b, n, h);
850            //ECPoint G = curve.decodePoint(Hex.decode("03"
851            //+ "015D4860D088DDB3496B0C6064756260441CDE4AF1771D4DB01FFE5B34E59703DC255A868A1180515603AEAB60794E54BB7996A7"));
852            ECPoint G = curve.decodePoint(Hex.decode("04"
853                + "015D4860D088DDB3496B0C6064756260441CDE4AF1771D4DB01FFE5B34E59703DC255A868A1180515603AEAB60794E54BB7996A7"
854                + "0061B1CFAB6BE5F32BBFA78324ED106A7636B9C5A7BD198D0158AA4F5488D08F38514F1FDF4B4F40D2181B3681C364BA0273C706"));
855
856            return new X9ECParameters(curve, G, n, h, S);
857        }
858    };
859
860    /*
861     * sect571k1
862     */
863    static X9ECParametersHolder sect571k1 = new X9ECParametersHolder()
864    {
865        protected X9ECParameters createParameters()
866        {
867            int m = 571;
868            int k1 = 2;
869            int k2 = 5;
870            int k3 = 10;
871
872            BigInteger a = ECConstants.ZERO;
873            BigInteger b = BigInteger.valueOf(1);
874            byte[] S = null;
875            BigInteger n = fromHex("020000000000000000000000000000000000000000000000000000000000000000000000131850E1F19A63E4B391A8DB917F4138B630D84BE5D639381E91DEB45CFE778F637C1001");
876            BigInteger h = BigInteger.valueOf(4);
877
878            ECCurve curve = new ECCurve.F2m(m, k1, k2, k3, a, b, n, h);
879            //ECPoint G = curve.decodePoint(Hex.decode("02"
880            //+ "026EB7A859923FBC82189631F8103FE4AC9CA2970012D5D46024804801841CA44370958493B205E647DA304DB4CEB08CBBD1BA39494776FB988B47174DCA88C7E2945283A01C8972"));
881            ECPoint G = curve.decodePoint(Hex.decode("04"
882                + "026EB7A859923FBC82189631F8103FE4AC9CA2970012D5D46024804801841CA44370958493B205E647DA304DB4CEB08CBBD1BA39494776FB988B47174DCA88C7E2945283A01C8972"
883                + "0349DC807F4FBF374F4AEADE3BCA95314DD58CEC9F307A54FFC61EFC006D8A2C9D4979C0AC44AEA74FBEBBB9F772AEDCB620B01A7BA7AF1B320430C8591984F601CD4C143EF1C7A3"));
884
885            return new X9ECParameters(curve, G, n, h, S);
886        }
887    };
888
889    /*
890     * sect571r1
891     */
892    static X9ECParametersHolder sect571r1 = new X9ECParametersHolder()
893    {
894        protected X9ECParameters createParameters()
895        {
896            int m = 571;
897            int k1 = 2;
898            int k2 = 5;
899            int k3 = 10;
900
901            BigInteger a = BigInteger.valueOf(1);
902            BigInteger b = fromHex("02F40E7E2221F295DE297117B7F3D62F5C6A97FFCB8CEFF1CD6BA8CE4A9A18AD84FFABBD8EFA59332BE7AD6756A66E294AFD185A78FF12AA520E4DE739BACA0C7FFEFF7F2955727A");
903            byte[] S = Hex.decode("2AA058F73A0E33AB486B0F610410C53A7F132310");
904            BigInteger n = fromHex("03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE661CE18FF55987308059B186823851EC7DD9CA1161DE93D5174D66E8382E9BB2FE84E47");
905            BigInteger h = BigInteger.valueOf(2);
906
907            ECCurve curve = new ECCurve.F2m(m, k1, k2, k3, a, b, n, h);
908            //ECPoint G = curve.decodePoint(Hex.decode("03"
909            //+ "0303001D34B856296C16C0D40D3CD7750A93D1D2955FA80AA5F40FC8DB7B2ABDBDE53950F4C0D293CDD711A35B67FB1499AE60038614F1394ABFA3B4C850D927E1E7769C8EEC2D19"));
910            ECPoint G = curve.decodePoint(Hex.decode("04"
911                + "0303001D34B856296C16C0D40D3CD7750A93D1D2955FA80AA5F40FC8DB7B2ABDBDE53950F4C0D293CDD711A35B67FB1499AE60038614F1394ABFA3B4C850D927E1E7769C8EEC2D19"
912                + "037BF27342DA639B6DCCFFFEB73D69D78C6C27A6009CBBCA1980F8533921E8A684423E43BAB08A576291AF8F461BB2A8B3531D2F0485C19B16E2F1516E23DD3C1A4827AF1B8AC15B"));
913
914            return new X9ECParameters(curve, G, n, h, S);
915        }
916    };
917
918
919    static final Hashtable objIds = new Hashtable();
920    static final Hashtable curves = new Hashtable();
921    static final Hashtable names = new Hashtable();
922
923    static void defineCurve(String name, ASN1ObjectIdentifier oid, X9ECParametersHolder holder)
924    {
925        objIds.put(name, oid);
926        names.put(oid, name);
927        curves.put(oid, holder);
928    }
929
930    static
931    {
932        defineCurve("secp112r1", SECObjectIdentifiers.secp112r1, secp112r1);
933        defineCurve("secp112r2", SECObjectIdentifiers.secp112r2, secp112r2);
934        defineCurve("secp128r1", SECObjectIdentifiers.secp128r1, secp128r1);
935        defineCurve("secp128r2", SECObjectIdentifiers.secp128r2, secp128r2);
936        defineCurve("secp160k1", SECObjectIdentifiers.secp160k1, secp160k1);
937        defineCurve("secp160r1", SECObjectIdentifiers.secp160r1, secp160r1);
938        defineCurve("secp160r2", SECObjectIdentifiers.secp160r2, secp160r2);
939        defineCurve("secp192k1", SECObjectIdentifiers.secp192k1, secp192k1);
940        defineCurve("secp192r1", SECObjectIdentifiers.secp192r1, secp192r1);
941        defineCurve("secp224k1", SECObjectIdentifiers.secp224k1, secp224k1);
942        defineCurve("secp224r1", SECObjectIdentifiers.secp224r1, secp224r1);
943        defineCurve("secp256k1", SECObjectIdentifiers.secp256k1, secp256k1);
944        defineCurve("secp256r1", SECObjectIdentifiers.secp256r1, secp256r1);
945        defineCurve("secp384r1", SECObjectIdentifiers.secp384r1, secp384r1);
946        defineCurve("secp521r1", SECObjectIdentifiers.secp521r1, secp521r1);
947
948        defineCurve("sect113r1", SECObjectIdentifiers.sect113r1, sect113r1);
949        defineCurve("sect113r2", SECObjectIdentifiers.sect113r2, sect113r2);
950        defineCurve("sect131r1", SECObjectIdentifiers.sect131r1, sect131r1);
951        defineCurve("sect131r2", SECObjectIdentifiers.sect131r2, sect131r2);
952        defineCurve("sect163k1", SECObjectIdentifiers.sect163k1, sect163k1);
953        defineCurve("sect163r1", SECObjectIdentifiers.sect163r1, sect163r1);
954        defineCurve("sect163r2", SECObjectIdentifiers.sect163r2, sect163r2);
955        defineCurve("sect193r1", SECObjectIdentifiers.sect193r1, sect193r1);
956        defineCurve("sect193r2", SECObjectIdentifiers.sect193r2, sect193r2);
957        defineCurve("sect233k1", SECObjectIdentifiers.sect233k1, sect233k1);
958        defineCurve("sect233r1", SECObjectIdentifiers.sect233r1, sect233r1);
959        defineCurve("sect239k1", SECObjectIdentifiers.sect239k1, sect239k1);
960        defineCurve("sect283k1", SECObjectIdentifiers.sect283k1, sect283k1);
961        defineCurve("sect283r1", SECObjectIdentifiers.sect283r1, sect283r1);
962        defineCurve("sect409k1", SECObjectIdentifiers.sect409k1, sect409k1);
963        defineCurve("sect409r1", SECObjectIdentifiers.sect409r1, sect409r1);
964        defineCurve("sect571k1", SECObjectIdentifiers.sect571k1, sect571k1);
965        defineCurve("sect571r1", SECObjectIdentifiers.sect571r1, sect571r1);
966    }
967
968    public static X9ECParameters getByName(
969        String name)
970    {
971        ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier)objIds.get(Strings.toLowerCase(name));
972
973        if (oid != null)
974        {
975            return getByOID(oid);
976        }
977
978        return null;
979    }
980
981    /**
982     * return the X9ECParameters object for the named curve represented by
983     * the passed in object identifier. Null if the curve isn't present.
984     *
985     * @param oid an object identifier representing a named curve, if present.
986     */
987    public static X9ECParameters getByOID(
988        ASN1ObjectIdentifier oid)
989    {
990        X9ECParametersHolder holder = (X9ECParametersHolder)curves.get(oid);
991
992        if (holder != null)
993        {
994            return holder.getParameters();
995        }
996
997        return null;
998    }
999
1000    /**
1001     * return the object identifier signified by the passed in name. Null
1002     * if there is no object identifier associated with name.
1003     *
1004     * @return the object identifier associated with name, if present.
1005     */
1006    public static ASN1ObjectIdentifier getOID(
1007        String name)
1008    {
1009        return (ASN1ObjectIdentifier)objIds.get(Strings.toLowerCase(name));
1010    }
1011
1012    /**
1013     * return the named curve name represented by the given object identifier.
1014     */
1015    public static String getName(
1016        ASN1ObjectIdentifier oid)
1017    {
1018        return (String)names.get(oid);
1019    }
1020
1021    /**
1022     * returns an enumeration containing the name strings for curves
1023     * contained in this structure.
1024     */
1025    public static Enumeration getNames()
1026    {
1027        return objIds.keys();
1028    }
1029}
1030