Crypto++
eccrypto.cpp
1 // eccrypto.cpp - written and placed in the public domain by Wei Dai
2 
3 #include "pch.h"
4 
5 #ifndef CRYPTOPP_IMPORTS
6 
7 #include "eccrypto.h"
8 #include "nbtheory.h"
9 #include "oids.h"
10 #include "hex.h"
11 #include "argnames.h"
12 #include "ec2n.h"
13 
14 NAMESPACE_BEGIN(CryptoPP)
15 
16 #if 0
17 static void ECDSA_TestInstantiations()
18 {
20  ECDSA<EC2N>::Verifier t2(t1);
22  ECNR<ECP>::Verifier t4(t3);
27 }
28 #endif
29 
30 // VC60 workaround: complains when these functions are put into an anonymous namespace
31 static Integer ConvertToInteger(const PolynomialMod2 &x)
32 {
33  unsigned int l = x.ByteCount();
34  SecByteBlock temp(l);
35  x.Encode(temp, l);
36  return Integer(temp, l);
37 }
38 
39 static inline Integer ConvertToInteger(const Integer &x)
40 {
41  return x;
42 }
43 
44 static bool CheckMOVCondition(const Integer &q, const Integer &r)
45 {
46  // see "Updated standards for validating elliptic curves", http://eprint.iacr.org/2007/343
47  Integer t = 1;
48  unsigned int n = q.IsEven() ? 1 : q.BitCount(), m = r.BitCount();
49 
50  for (unsigned int i=n; DiscreteLogWorkFactor(i)<m/2; i+=n)
51  {
52  if (q.IsEven())
53  t = (t+t)%r;
54  else
55  t = (t*q)%r;
56  if (t == 1)
57  return false;
58  }
59  return true;
60 }
61 
62 // ******************************************************************
63 
64 template <class T> struct EcRecommendedParameters;
65 
66 template<> struct EcRecommendedParameters<EC2N>
67 {
68  EcRecommendedParameters(const OID &oid, unsigned int t2, unsigned int t3, unsigned int t4, const char *a, const char *b, const char *g, const char *n, unsigned int h)
69  : oid(oid), t0(0), t1(0), t2(t2), t3(t3), t4(t4), a(a), b(b), g(g), n(n), h(h) {}
70  EcRecommendedParameters(const OID &oid, unsigned int t0, unsigned int t1, unsigned int t2, unsigned int t3, unsigned int t4, const char *a, const char *b, const char *g, const char *n, unsigned int h)
71  : oid(oid), t0(t0), t1(t1), t2(t2), t3(t3), t4(t4), a(a), b(b), g(g), n(n), h(h) {}
72  EC2N *NewEC() const
73  {
74  StringSource ssA(a, true, new HexDecoder);
75  StringSource ssB(b, true, new HexDecoder);
76  if (t0 == 0)
77  return new EC2N(GF2NT(t2, t3, t4), EC2N::FieldElement(ssA, (size_t)ssA.MaxRetrievable()), EC2N::FieldElement(ssB, (size_t)ssB.MaxRetrievable()));
78  else
79  return new EC2N(GF2NPP(t0, t1, t2, t3, t4), EC2N::FieldElement(ssA, (size_t)ssA.MaxRetrievable()), EC2N::FieldElement(ssB, (size_t)ssB.MaxRetrievable()));
80  };
81 
82  OID oid;
83  unsigned int t0, t1, t2, t3, t4;
84  const char *a, *b, *g, *n;
85  unsigned int h;
86 };
87 
88 template<> struct EcRecommendedParameters<ECP>
89 {
90  EcRecommendedParameters(const OID &oid, const char *p, const char *a, const char *b, const char *g, const char *n, unsigned int h)
91  : oid(oid), p(p), a(a), b(b), g(g), n(n), h(h) {}
92  ECP *NewEC() const
93  {
94  StringSource ssP(p, true, new HexDecoder);
95  StringSource ssA(a, true, new HexDecoder);
96  StringSource ssB(b, true, new HexDecoder);
97  return new ECP(Integer(ssP, (size_t)ssP.MaxRetrievable()), ECP::FieldElement(ssA, (size_t)ssA.MaxRetrievable()), ECP::FieldElement(ssB, (size_t)ssB.MaxRetrievable()));
98  };
99 
100  OID oid;
101  const char *p;
102  const char *a, *b, *g, *n;
103  unsigned int h;
104 };
105 
107 {
108  template <typename T>
109  inline bool operator()(const EcRecommendedParameters<T>& a, const OID& b) {return a.oid < b;}
110  template <typename T>
111  inline bool operator()(const OID& a, const EcRecommendedParameters<T>& b) {return a < b.oid;}
112  template <typename T>
113  inline bool operator()(const EcRecommendedParameters<T>& a, const EcRecommendedParameters<T>& b) {return a.oid < b.oid;}
114 };
115 
116 static void GetRecommendedParameters(const EcRecommendedParameters<EC2N> *&begin, const EcRecommendedParameters<EC2N> *&end)
117 {
118  // this array must be sorted by OID
119  static const EcRecommendedParameters<EC2N> rec[] = {
120  EcRecommendedParameters<EC2N>(ASN1::sect163k1(),
121  163, 7, 6, 3, 0,
122  "000000000000000000000000000000000000000001",
123  "000000000000000000000000000000000000000001",
124  "0402FE13C0537BBC11ACAA07D793DE4E6D5E5C94EEE80289070FB05D38FF58321F2E800536D538CCDAA3D9",
125  "04000000000000000000020108A2E0CC0D99F8A5EF",
126  2),
127  EcRecommendedParameters<EC2N>(ASN1::sect163r1(),
128  163, 7, 6, 3, 0,
129  "07B6882CAAEFA84F9554FF8428BD88E246D2782AE2",
130  "0713612DCDDCB40AAB946BDA29CA91F73AF958AFD9",
131  "040369979697AB43897789566789567F787A7876A65400435EDB42EFAFB2989D51FEFCE3C80988F41FF883",
132  "03FFFFFFFFFFFFFFFFFFFF48AAB689C29CA710279B",
133  2),
134  EcRecommendedParameters<EC2N>(ASN1::sect239k1(),
135  239, 158, 0,
136  "000000000000000000000000000000000000000000000000000000000000",
137  "000000000000000000000000000000000000000000000000000000000001",
138  "0429A0B6A887A983E9730988A68727A8B2D126C44CC2CC7B2A6555193035DC76310804F12E549BDB011C103089E73510ACB275FC312A5DC6B76553F0CA",
139  "2000000000000000000000000000005A79FEC67CB6E91F1C1DA800E478A5",
140  4),
141  EcRecommendedParameters<EC2N>(ASN1::sect113r1(),
142  113, 9, 0,
143  "003088250CA6E7C7FE649CE85820F7",
144  "00E8BEE4D3E2260744188BE0E9C723",
145  "04009D73616F35F4AB1407D73562C10F00A52830277958EE84D1315ED31886",
146  "0100000000000000D9CCEC8A39E56F",
147  2),
148  EcRecommendedParameters<EC2N>(ASN1::sect113r2(),
149  113, 9, 0,
150  "00689918DBEC7E5A0DD6DFC0AA55C7",
151  "0095E9A9EC9B297BD4BF36E059184F",
152  "0401A57A6A7B26CA5EF52FCDB816479700B3ADC94ED1FE674C06E695BABA1D",
153  "010000000000000108789B2496AF93",
154  2),
155  EcRecommendedParameters<EC2N>(ASN1::sect163r2(),
156  163, 7, 6, 3, 0,
157  "000000000000000000000000000000000000000001",
158  "020A601907B8C953CA1481EB10512F78744A3205FD",
159  "0403F0EBA16286A2D57EA0991168D4994637E8343E3600D51FBC6C71A0094FA2CDD545B11C5C0C797324F1",
160  "040000000000000000000292FE77E70C12A4234C33",
161  2),
162  EcRecommendedParameters<EC2N>(ASN1::sect283k1(),
163  283, 12, 7, 5, 0,
164  "000000000000000000000000000000000000000000000000000000000000000000000000",
165  "000000000000000000000000000000000000000000000000000000000000000000000001",
166  "040503213F78CA44883F1A3B8162F188E553CD265F23C1567A16876913B0C2AC245849283601CCDA380F1C9E318D90F95D07E5426FE87E45C0E8184698E45962364E34116177DD2259",
167  "01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE9AE2ED07577265DFF7F94451E061E163C61",
168  4),
169  EcRecommendedParameters<EC2N>(ASN1::sect283r1(),
170  283, 12, 7, 5, 0,
171  "000000000000000000000000000000000000000000000000000000000000000000000001",
172  "027B680AC8B8596DA5A4AF8A19A0303FCA97FD7645309FA2A581485AF6263E313B79A2F5",
173  "0405F939258DB7DD90E1934F8C70B0DFEC2EED25B8557EAC9C80E2E198F8CDBECD86B1205303676854FE24141CB98FE6D4B20D02B4516FF702350EDDB0826779C813F0DF45BE8112F4",
174  "03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEF90399660FC938A90165B042A7CEFADB307",
175  2),
176  EcRecommendedParameters<EC2N>(ASN1::sect131r1(),
177  131, 8, 3, 2, 0,
178  "07A11B09A76B562144418FF3FF8C2570B8",
179  "0217C05610884B63B9C6C7291678F9D341",
180  "040081BAF91FDF9833C40F9C181343638399078C6E7EA38C001F73C8134B1B4EF9E150",
181  "0400000000000000023123953A9464B54D",
182  2),
183  EcRecommendedParameters<EC2N>(ASN1::sect131r2(),
184  131, 8, 3, 2, 0,
185  "03E5A88919D7CAFCBF415F07C2176573B2",
186  "04B8266A46C55657AC734CE38F018F2192",
187  "040356DCD8F2F95031AD652D23951BB366A80648F06D867940A5366D9E265DE9EB240F",
188  "0400000000000000016954A233049BA98F",
189  2),
190  EcRecommendedParameters<EC2N>(ASN1::sect193r1(),
191  193, 15, 0,
192  "0017858FEB7A98975169E171F77B4087DE098AC8A911DF7B01",
193  "00FDFB49BFE6C3A89FACADAA7A1E5BBC7CC1C2E5D831478814",
194  "0401F481BC5F0FF84A74AD6CDF6FDEF4BF6179625372D8C0C5E10025E399F2903712CCF3EA9E3A1AD17FB0B3201B6AF7CE1B05",
195  "01000000000000000000000000C7F34A778F443ACC920EBA49",
196  2),
197  EcRecommendedParameters<EC2N>(ASN1::sect193r2(),
198  193, 15, 0,
199  "0163F35A5137C2CE3EA6ED8667190B0BC43ECD69977702709B",
200  "00C9BB9E8927D4D64C377E2AB2856A5B16E3EFB7F61D4316AE",
201  "0400D9B67D192E0367C803F39E1A7E82CA14A651350AAE617E8F01CE94335607C304AC29E7DEFBD9CA01F596F927224CDECF6C",
202  "010000000000000000000000015AAB561B005413CCD4EE99D5",
203  2),
204  EcRecommendedParameters<EC2N>(ASN1::sect233k1(),
205  233, 74, 0,
206  "000000000000000000000000000000000000000000000000000000000000",
207  "000000000000000000000000000000000000000000000000000000000001",
208  "04017232BA853A7E731AF129F22FF4149563A419C26BF50A4C9D6EEFAD612601DB537DECE819B7F70F555A67C427A8CD9BF18AEB9B56E0C11056FAE6A3",
209  "8000000000000000000000000000069D5BB915BCD46EFB1AD5F173ABDF",
210  4),
211  EcRecommendedParameters<EC2N>(ASN1::sect233r1(),
212  233, 74, 0,
213  "000000000000000000000000000000000000000000000000000000000001",
214  "0066647EDE6C332C7F8C0923BB58213B333B20E9CE4281FE115F7D8F90AD",
215  "0400FAC9DFCBAC8313BB2139F1BB755FEF65BC391F8B36F8F8EB7371FD558B01006A08A41903350678E58528BEBF8A0BEFF867A7CA36716F7E01F81052",
216  "01000000000000000000000000000013E974E72F8A6922031D2603CFE0D7",
217  2),
218  EcRecommendedParameters<EC2N>(ASN1::sect409k1(),
219  409, 87, 0,
220  "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
221  "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
222  "040060F05F658F49C1AD3AB1890F7184210EFD0987E307C84C27ACCFB8F9F67CC2C460189EB5AAAA62EE222EB1B35540CFE902374601E369050B7C4E42ACBA1DACBF04299C3460782F918EA427E6325165E9EA10E3DA5F6C42E9C55215AA9CA27A5863EC48D8E0286B",
223  "7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE5F83B2D4EA20400EC4557D5ED3E3E7CA5B4B5C83B8E01E5FCF",
224  4),
225  EcRecommendedParameters<EC2N>(ASN1::sect409r1(),
226  409, 87, 0,
227  "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
228  "0021A5C2C8EE9FEB5C4B9A753B7B476B7FD6422EF1F3DD674761FA99D6AC27C8A9A197B272822F6CD57A55AA4F50AE317B13545F",
229  "04015D4860D088DDB3496B0C6064756260441CDE4AF1771D4DB01FFE5B34E59703DC255A868A1180515603AEAB60794E54BB7996A70061B1CFAB6BE5F32BBFA78324ED106A7636B9C5A7BD198D0158AA4F5488D08F38514F1FDF4B4F40D2181B3681C364BA0273C706",
230  "010000000000000000000000000000000000000000000000000001E2AAD6A612F33307BE5FA47C3C9E052F838164CD37D9A21173",
231  2),
232  EcRecommendedParameters<EC2N>(ASN1::sect571k1(),
233  571, 10, 5, 2, 0,
234  "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
235  "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
236  "04026EB7A859923FBC82189631F8103FE4AC9CA2970012D5D46024804801841CA44370958493B205E647DA304DB4CEB08CBBD1BA39494776FB988B47174DCA88C7E2945283A01C89720349DC807F4FBF374F4AEADE3BCA95314DD58CEC9F307A54FFC61EFC006D8A2C9D4979C0AC44AEA74FBEBBB9F772AEDCB620B01A7BA7AF1B320430C8591984F601CD4C143EF1C7A3",
237  "020000000000000000000000000000000000000000000000000000000000000000000000131850E1F19A63E4B391A8DB917F4138B630D84BE5D639381E91DEB45CFE778F637C1001",
238  4),
239  EcRecommendedParameters<EC2N>(ASN1::sect571r1(),
240  571, 10, 5, 2, 0,
241  "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
242  "02F40E7E2221F295DE297117B7F3D62F5C6A97FFCB8CEFF1CD6BA8CE4A9A18AD84FFABBD8EFA59332BE7AD6756A66E294AFD185A78FF12AA520E4DE739BACA0C7FFEFF7F2955727A",
243  "040303001D34B856296C16C0D40D3CD7750A93D1D2955FA80AA5F40FC8DB7B2ABDBDE53950F4C0D293CDD711A35B67FB1499AE60038614F1394ABFA3B4C850D927E1E7769C8EEC2D19037BF27342DA639B6DCCFFFEB73D69D78C6C27A6009CBBCA1980F8533921E8A684423E43BAB08A576291AF8F461BB2A8B3531D2F0485C19B16E2F1516E23DD3C1A4827AF1B8AC15B",
244  "03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE661CE18FF55987308059B186823851EC7DD9CA1161DE93D5174D66E8382E9BB2FE84E47",
245  2),
246  };
247  begin = rec;
248  end = rec + sizeof(rec)/sizeof(rec[0]);
249 }
250 
251 static void GetRecommendedParameters(const EcRecommendedParameters<ECP> *&begin, const EcRecommendedParameters<ECP> *&end)
252 {
253  // this array must be sorted by OID
254  static const EcRecommendedParameters<ECP> rec[] = {
255  EcRecommendedParameters<ECP>(ASN1::secp192r1(),
256  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF",
257  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC",
258  "64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1",
259  "04188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF101207192B95FFC8DA78631011ED6B24CDD573F977A11E794811",
260  "FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831",
261  1),
262  EcRecommendedParameters<ECP>(ASN1::secp256r1(),
263  "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF",
264  "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC",
265  "5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B",
266  "046B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C2964FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5",
267  "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551",
268  1),
269  EcRecommendedParameters<ECP>(ASN1::brainpoolP160r1(),
270  "E95E4A5F737059DC60DFC7AD95B3D8139515620F",
271  "340E7BE2A280EB74E2BE61BADA745D97E8F7C300",
272  "1E589A8595423412134FAA2DBDEC95C8D8675E58",
273  "04BED5AF16EA3F6A4F62938C4631EB5AF7BDBCDBC31667CB477A1A8EC338F94741669C976316DA6321",
274  "E95E4A5F737059DC60DF5991D45029409E60FC09",
275  1),
276  EcRecommendedParameters<ECP>(ASN1::brainpoolP192r1(),
277  "C302F41D932A36CDA7A3463093D18DB78FCE476DE1A86297",
278  "6A91174076B1E0E19C39C031FE8685C1CAE040E5C69A28EF",
279  "469A28EF7C28CCA3DC721D044F4496BCCA7EF4146FBF25C9",
280  "04C0A0647EAAB6A48753B033C56CB0F0900A2F5C4853375FD614B690866ABD5BB88B5F4828C1490002E6773FA2FA299B8F",
281  "C302F41D932A36CDA7A3462F9E9E916B5BE8F1029AC4ACC1",
282  1),
283  EcRecommendedParameters<ECP>(ASN1::brainpoolP224r1(),
284  "D7C134AA264366862A18302575D1D787B09F075797DA89F57EC8C0FF",
285  "68A5E62CA9CE6C1C299803A6C1530B514E182AD8B0042A59CAD29F43",
286  "2580F63CCFE44138870713B1A92369E33E2135D266DBB372386C400B",
287  "040D9029AD2C7E5CF4340823B2A87DC68C9E4CE3174C1E6EFDEE12C07D58AA56F772C0726F24C6B89E4ECDAC24354B9E99CAA3F6D3761402CD",
288  "D7C134AA264366862A18302575D0FB98D116BC4B6DDEBCA3A5A7939F",
289  1),
290  EcRecommendedParameters<ECP>(ASN1::brainpoolP256r1(),
291  "A9FB57DBA1EEA9BC3E660A909D838D726E3BF623D52620282013481D1F6E5377",
292  "7D5A0975FC2C3057EEF67530417AFFE7FB8055C126DC5C6CE94A4B44F330B5D9",
293  "26DC5C6CE94A4B44F330B5D9BBD77CBF958416295CF7E1CE6BCCDC18FF8C07B6",
294  "048BD2AEB9CB7E57CB2C4B482FFC81B7AFB9DE27E1E3BD23C23A4453BD9ACE3262547EF835C3DAC4FD97F8461A14611DC9C27745132DED8E545C1D54C72F046997",
295  "A9FB57DBA1EEA9BC3E660A909D838D718C397AA3B561A6F7901E0E82974856A7",
296  1),
297  EcRecommendedParameters<ECP>(ASN1::brainpoolP320r1(),
298  "D35E472036BC4FB7E13C785ED201E065F98FCFA6F6F40DEF4F92B9EC7893EC28FCD412B1F1B32E27",
299  "3EE30B568FBAB0F883CCEBD46D3F3BB8A2A73513F5EB79DA66190EB085FFA9F492F375A97D860EB4",
300  "520883949DFDBC42D3AD198640688A6FE13F41349554B49ACC31DCCD884539816F5EB4AC8FB1F1A6",
301  "0443BD7E9AFB53D8B85289BCC48EE5BFE6F20137D10A087EB6E7871E2A10A599C710AF8D0D39E2061114FDD05545EC1CC8AB4093247F77275E0743FFED117182EAA9C77877AAAC6AC7D35245D1692E8EE1",
302  "D35E472036BC4FB7E13C785ED201E065F98FCFA5B68F12A32D482EC7EE8658E98691555B44C59311",
303  1),
304  EcRecommendedParameters<ECP>(ASN1::brainpoolP384r1(),
305  "8CB91E82A3386D280F5D6F7E50E641DF152F7109ED5456B412B1DA197FB71123ACD3A729901D1A71874700133107EC53",
306  "7BC382C63D8C150C3C72080ACE05AFA0C2BEA28E4FB22787139165EFBA91F90F8AA5814A503AD4EB04A8C7DD22CE2826",
307  "04A8C7DD22CE28268B39B55416F0447C2FB77DE107DCD2A62E880EA53EEB62D57CB4390295DBC9943AB78696FA504C11",
308  "041D1C64F068CF45FFA2A63A81B7C13F6B8847A3E77EF14FE3DB7FCAFE0CBD10E8E826E03436D646AAEF87B2E247D4AF1E8ABE1D7520F9C2A45CB1EB8E95CFD55262B70B29FEEC5864E19C054FF99129280E4646217791811142820341263C5315",
309  "8CB91E82A3386D280F5D6F7E50E641DF152F7109ED5456B31F166E6CAC0425A7CF3AB6AF6B7FC3103B883202E9046565",
310  1),
311  EcRecommendedParameters<ECP>(ASN1::brainpoolP512r1(),
312  "AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA703308717D4D9B009BC66842AECDA12AE6A380E62881FF2F2D82C68528AA6056583A48F3",
313  "7830A3318B603B89E2327145AC234CC594CBDD8D3DF91610A83441CAEA9863BC2DED5D5AA8253AA10A2EF1C98B9AC8B57F1117A72BF2C7B9E7C1AC4D77FC94CA",
314  "3DF91610A83441CAEA9863BC2DED5D5AA8253AA10A2EF1C98B9AC8B57F1117A72BF2C7B9E7C1AC4D77FC94CADC083E67984050B75EBAE5DD2809BD638016F723",
315  "0481AEE4BDD82ED9645A21322E9C4C6A9385ED9F70B5D916C1B43B62EEF4D0098EFF3B1F78E2D0D48D50D1687B93B97D5F7C6D5047406A5E688B352209BCB9F8227DDE385D566332ECC0EABFA9CF7822FDF209F70024A57B1AA000C55B881F8111B2DCDE494A5F485E5BCA4BD88A2763AED1CA2B2FA8F0540678CD1E0F3AD80892",
316  "AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA70330870553E5C414CA92619418661197FAC10471DB1D381085DDADDB58796829CA90069",
317  1),
318  EcRecommendedParameters<ECP>(ASN1::secp112r1(),
319  "DB7C2ABF62E35E668076BEAD208B",
320  "DB7C2ABF62E35E668076BEAD2088",
321  "659EF8BA043916EEDE8911702B22",
322  "0409487239995A5EE76B55F9C2F098A89CE5AF8724C0A23E0E0FF77500",
323  "DB7C2ABF62E35E7628DFAC6561C5",
324  1),
325  EcRecommendedParameters<ECP>(ASN1::secp112r2(),
326  "DB7C2ABF62E35E668076BEAD208B",
327  "6127C24C05F38A0AAAF65C0EF02C",
328  "51DEF1815DB5ED74FCC34C85D709",
329  "044BA30AB5E892B4E1649DD0928643ADCD46F5882E3747DEF36E956E97",
330  "36DF0AAFD8B8D7597CA10520D04B",
331  4),
332  EcRecommendedParameters<ECP>(ASN1::secp160r1(),
333  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF",
334  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC",
335  "1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45",
336  "044A96B5688EF573284664698968C38BB913CBFC8223A628553168947D59DCC912042351377AC5FB32",
337  "0100000000000000000001F4C8F927AED3CA752257",
338  1),
339  EcRecommendedParameters<ECP>(ASN1::secp160k1(),
340  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73",
341  "0000000000000000000000000000000000000000",
342  "0000000000000000000000000000000000000007",
343  "043B4C382CE37AA192A4019E763036F4F5DD4D7EBB938CF935318FDCED6BC28286531733C3F03C4FEE",
344  "0100000000000000000001B8FA16DFAB9ACA16B6B3",
345  1),
346  EcRecommendedParameters<ECP>(ASN1::secp256k1(),
347  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F",
348  "0000000000000000000000000000000000000000000000000000000000000000",
349  "0000000000000000000000000000000000000000000000000000000000000007",
350  "0479BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8",
351  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141",
352  1),
353  EcRecommendedParameters<ECP>(ASN1::secp128r1(),
354  "FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF",
355  "FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFC",
356  "E87579C11079F43DD824993C2CEE5ED3",
357  "04161FF7528B899B2D0C28607CA52C5B86CF5AC8395BAFEB13C02DA292DDED7A83",
358  "FFFFFFFE0000000075A30D1B9038A115",
359  1),
360  EcRecommendedParameters<ECP>(ASN1::secp128r2(),
361  "FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF",
362  "D6031998D1B3BBFEBF59CC9BBFF9AEE1",
363  "5EEEFCA380D02919DC2C6558BB6D8A5D",
364  "047B6AA5D85E572983E6FB32A7CDEBC14027B6916A894D3AEE7106FE805FC34B44",
365  "3FFFFFFF7FFFFFFFBE0024720613B5A3",
366  4),
367  EcRecommendedParameters<ECP>(ASN1::secp160r2(),
368  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73",
369  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC70",
370  "B4E134D3FB59EB8BAB57274904664D5AF50388BA",
371  "0452DCB034293A117E1F4FF11B30F7199D3144CE6DFEAFFEF2E331F296E071FA0DF9982CFEA7D43F2E",
372  "0100000000000000000000351EE786A818F3A1A16B",
373  1),
374  EcRecommendedParameters<ECP>(ASN1::secp192k1(),
375  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37",
376  "000000000000000000000000000000000000000000000000",
377  "000000000000000000000000000000000000000000000003",
378  "04DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D",
379  "FFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D",
380  1),
381  EcRecommendedParameters<ECP>(ASN1::secp224k1(),
382  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFE56D",
383  "00000000000000000000000000000000000000000000000000000000",
384  "00000000000000000000000000000000000000000000000000000005",
385  "04A1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C7E089FED7FBA344282CAFBD6F7E319F7C0B0BD59E2CA4BDB556D61A5",
386  "010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7",
387  1),
388  EcRecommendedParameters<ECP>(ASN1::secp224r1(),
389  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001",
390  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE",
391  "B4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4",
392  "04B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21BD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34",
393  "FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D",
394  1),
395  EcRecommendedParameters<ECP>(ASN1::secp384r1(),
396  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF",
397  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC",
398  "B3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF",
399  "04AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB73617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A147CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F",
400  "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973",
401  1),
402  EcRecommendedParameters<ECP>(ASN1::secp521r1(),
403  "01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
404  "01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC",
405  "0051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00",
406  "0400C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66011839296A789A3BC0045C8A5FB42C7D1BD998F54449579B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C7086A272C24088BE94769FD16650",
407  "01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409",
408  1),
409  };
410  begin = rec;
411  end = rec + sizeof(rec)/sizeof(rec[0]);
412 }
413 
415 {
416  const EcRecommendedParameters<EllipticCurve> *begin, *end;
417  GetRecommendedParameters(begin, end);
418  const EcRecommendedParameters<EllipticCurve> *it = std::upper_bound(begin, end, oid, OIDLessThan());
419  return (it == end ? OID() : it->oid);
420 }
421 
422 template <class EC> void DL_GroupParameters_EC<EC>::Initialize(const OID &oid)
423 {
424  const EcRecommendedParameters<EllipticCurve> *begin, *end;
425  GetRecommendedParameters(begin, end);
426  const EcRecommendedParameters<EllipticCurve> *it = std::lower_bound(begin, end, oid, OIDLessThan());
427  if (it == end || it->oid != oid)
428  throw UnknownOID();
429 
430  const EcRecommendedParameters<EllipticCurve> &param = *it;
431  m_oid = oid;
432  std::auto_ptr<EllipticCurve> ec(param.NewEC());
433  this->m_groupPrecomputation.SetCurve(*ec);
434 
435  StringSource ssG(param.g, true, new HexDecoder);
436  Element G;
437  bool result = GetCurve().DecodePoint(G, ssG, (size_t)ssG.MaxRetrievable());
438  this->SetSubgroupGenerator(G);
439  assert(result);
440 
441  StringSource ssN(param.n, true, new HexDecoder);
442  m_n.Decode(ssN, (size_t)ssN.MaxRetrievable());
443  m_k = param.h;
444 }
445 
446 template <class EC>
447 bool DL_GroupParameters_EC<EC>::GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
448 {
449  if (strcmp(name, Name::GroupOID()) == 0)
450  {
451  if (m_oid.m_values.empty())
452  return false;
453 
454  this->ThrowIfTypeMismatch(name, typeid(OID), valueType);
455  *reinterpret_cast<OID *>(pValue) = m_oid;
456  return true;
457  }
458  else
459  return GetValueHelper<DL_GroupParameters<Element> >(this, name, valueType, pValue).Assignable()
460  CRYPTOPP_GET_FUNCTION_ENTRY(Curve);
461 }
462 
463 template <class EC>
464 void DL_GroupParameters_EC<EC>::AssignFrom(const NameValuePairs &source)
465 {
466  OID oid;
467  if (source.GetValue(Name::GroupOID(), oid))
468  Initialize(oid);
469  else
470  {
471  EllipticCurve ec;
472  Point G;
473  Integer n;
474 
475  source.GetRequiredParameter("DL_GroupParameters_EC<EC>", Name::Curve(), ec);
476  source.GetRequiredParameter("DL_GroupParameters_EC<EC>", Name::SubgroupGenerator(), G);
477  source.GetRequiredParameter("DL_GroupParameters_EC<EC>", Name::SubgroupOrder(), n);
478  Integer k = source.GetValueWithDefault(Name::Cofactor(), Integer::Zero());
479 
480  Initialize(ec, G, n, k);
481  }
482 }
483 
484 template <class EC>
486 {
487  try
488  {
489  AssignFrom(alg);
490  }
491  catch (InvalidArgument &)
492  {
493  throw NotImplemented("DL_GroupParameters_EC<EC>: curve generation is not implemented yet");
494  }
495 }
496 
497 template <class EC>
499 {
500  byte b;
501  if (!bt.Peek(b))
502  BERDecodeError();
503  if (b == OBJECT_IDENTIFIER)
504  Initialize(OID(bt));
505  else
506  {
507  BERSequenceDecoder seq(bt);
508  word32 version;
509  BERDecodeUnsigned<word32>(seq, version, INTEGER, 1, 1); // check version
510  EllipticCurve ec(seq);
511  Point G = ec.BERDecodePoint(seq);
512  Integer n(seq);
513  Integer k;
514  bool cofactorPresent = !seq.EndReached();
515  if (cofactorPresent)
516  k.BERDecode(seq);
517  else
518  k = Integer::Zero();
519  seq.MessageEnd();
520 
521  Initialize(ec, G, n, k);
522  }
523 }
524 
525 template <class EC>
527 {
528  if (m_encodeAsOID && !m_oid.m_values.empty())
529  m_oid.DEREncode(bt);
530  else
531  {
532  DERSequenceEncoder seq(bt);
533  DEREncodeUnsigned<word32>(seq, 1); // version
534  GetCurve().DEREncode(seq);
535  GetCurve().DEREncodePoint(seq, this->GetSubgroupGenerator(), m_compress);
536  m_n.DEREncode(seq);
537  if (m_k.NotZero())
538  m_k.DEREncode(seq);
539  seq.MessageEnd();
540  }
541 }
542 
543 template <class EC>
545 {
546  if (!m_k)
547  {
548  Integer q = GetCurve().FieldSize();
549  Integer qSqrt = q.SquareRoot();
550  m_k = (q+2*qSqrt+1)/m_n;
551  }
552 
553  return m_k;
554 }
555 
556 template <class EC>
558 {
559  return ConvertToInteger(element.x);
560 };
561 
562 template <class EC>
563 bool DL_GroupParameters_EC<EC>::ValidateGroup(RandomNumberGenerator &rng, unsigned int level) const
564 {
565  bool pass = GetCurve().ValidateParameters(rng, level);
566 
567  Integer q = GetCurve().FieldSize();
568  pass = pass && m_n!=q;
569 
570  if (level >= 2)
571  {
572  Integer qSqrt = q.SquareRoot();
573  pass = pass && m_n>4*qSqrt;
574  pass = pass && VerifyPrime(rng, m_n, level-2);
575  pass = pass && (m_k.IsZero() || m_k == (q+2*qSqrt+1)/m_n);
576  pass = pass && CheckMOVCondition(q, m_n);
577  }
578 
579  return pass;
580 }
581 
582 template <class EC>
583 bool DL_GroupParameters_EC<EC>::ValidateElement(unsigned int level, const Element &g, const DL_FixedBasePrecomputation<Element> *gpc) const
584 {
585  bool pass = !IsIdentity(g) && GetCurve().VerifyPoint(g);
586  if (level >= 1)
587  {
588  if (gpc)
589  pass = pass && gpc->Exponentiate(this->GetGroupPrecomputation(), Integer::One()) == g;
590  }
591  if (level >= 2 && pass)
592  {
593  const Integer &q = GetSubgroupOrder();
594  Element gq = gpc ? gpc->Exponentiate(this->GetGroupPrecomputation(), q) : this->ExponentiateElement(g, q);
595  pass = pass && IsIdentity(gq);
596  }
597  return pass;
598 }
599 
600 template <class EC>
601 void DL_GroupParameters_EC<EC>::SimultaneousExponentiate(Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const
602 {
603  GetCurve().SimultaneousMultiply(results, base, exponents, exponentsCount);
604 }
605 
606 template <class EC>
607 CPP_TYPENAME DL_GroupParameters_EC<EC>::Element DL_GroupParameters_EC<EC>::MultiplyElements(const Element &a, const Element &b) const
608 {
609  return GetCurve().Add(a, b);
610 }
611 
612 template <class EC>
613 CPP_TYPENAME DL_GroupParameters_EC<EC>::Element DL_GroupParameters_EC<EC>::CascadeExponentiate(const Element &element1, const Integer &exponent1, const Element &element2, const Integer &exponent2) const
614 {
615  return GetCurve().CascadeMultiply(exponent1, element1, exponent2, element2);
616 }
617 
618 template <class EC>
620 {
621  return ASN1::id_ecPublicKey();
622 }
623 
624 // ******************************************************************
625 
626 template <class EC>
627 void DL_PublicKey_EC<EC>::BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size)
628 {
629  typename EC::Point P;
630  if (!this->GetGroupParameters().GetCurve().DecodePoint(P, bt, size))
631  BERDecodeError();
632  this->SetPublicElement(P);
633 }
634 
635 template <class EC>
637 {
638  this->GetGroupParameters().GetCurve().EncodePoint(bt, this->GetPublicElement(), this->GetGroupParameters().GetPointCompression());
639 }
640 
641 // ******************************************************************
642 
643 template <class EC>
644 void DL_PrivateKey_EC<EC>::BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size)
645 {
646  BERSequenceDecoder seq(bt);
647  word32 version;
648  BERDecodeUnsigned<word32>(seq, version, INTEGER, 1, 1); // check version
649 
650  BERGeneralDecoder dec(seq, OCTET_STRING);
651  if (!dec.IsDefiniteLength())
652  BERDecodeError();
653  Integer x;
654  x.Decode(dec, (size_t)dec.RemainingLength());
655  dec.MessageEnd();
656  if (!parametersPresent && seq.PeekByte() != (CONTEXT_SPECIFIC | CONSTRUCTED | 0))
657  BERDecodeError();
658  if (!seq.EndReached() && seq.PeekByte() == (CONTEXT_SPECIFIC | CONSTRUCTED | 0))
659  {
660  BERGeneralDecoder parameters(seq, CONTEXT_SPECIFIC | CONSTRUCTED | 0);
661  this->AccessGroupParameters().BERDecode(parameters);
662  parameters.MessageEnd();
663  }
664  if (!seq.EndReached())
665  {
666  // skip over the public element
667  SecByteBlock subjectPublicKey;
668  unsigned int unusedBits;
669  BERGeneralDecoder publicKey(seq, CONTEXT_SPECIFIC | CONSTRUCTED | 1);
670  BERDecodeBitString(publicKey, subjectPublicKey, unusedBits);
671  publicKey.MessageEnd();
672  Element Q;
673  if (!(unusedBits == 0 && this->GetGroupParameters().GetCurve().DecodePoint(Q, subjectPublicKey, subjectPublicKey.size())))
674  BERDecodeError();
675  }
676  seq.MessageEnd();
677 
678  this->SetPrivateExponent(x);
679 }
680 
681 template <class EC>
683 {
684  DERSequenceEncoder privateKey(bt);
685  DEREncodeUnsigned<word32>(privateKey, 1); // version
686  // SEC 1 ver 1.0 says privateKey (m_d) has the same length as order of the curve
687  // this will be changed to order of base point in a future version
688  this->GetPrivateExponent().DEREncodeAsOctetString(privateKey, this->GetGroupParameters().GetSubgroupOrder().ByteCount());
689  privateKey.MessageEnd();
690 }
691 
692 NAMESPACE_END
693 
694 #endif
exception thrown when an invalid argument is detected
Definition: cryptlib.h:145
virtual size_t Peek(byte &outByte) const
peek at the next byte without removing it from the output buffer
Definition: cryptlib.cpp:424
GF(2^n) with Trinomial Basis.
Definition: gf2n.h:317
Elliptic Curve over GF(p), where p is prime.
Definition: ecp.h:30
Decode base 16 data back to bytes.
Definition: hex.h:22
a block of memory allocated using A
Definition: secblock.h:238
unsigned int ByteCount() const
number of significant bytes = ceiling(BitCount()/8)
Definition: gf2n.cpp:184
interface for random number generators
Definition: cryptlib.h:669
void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg)
this implementation doesn't actually generate a curve, it just initializes the parameters with existi...
Definition: eccrypto.cpp:485
BER Sequence Decoder.
Definition: asn.h:177
interface for buffered transformations
Definition: cryptlib.h:771
string-based implementation of Source interface
Definition: filters.h:780
static const Integer & One()
avoid calling constructors for these frequently used integers
Definition: integer.cpp:2867
void DEREncodePrivateKey(BufferedTransformation &bt) const
encode privateKey part of privateKeyInfo, without the OCTET STRING header
Definition: eccrypto.cpp:682
Polynomial with Coefficients in GF(2)
Definition: gf2n.h:17
unsigned int BitCount() const
number of significant bits = floor(log2(abs(*this))) + 1
Definition: integer.cpp:3054
Integer SquareRoot() const
extract square root, if negative return 0, else return floor of square root
Definition: integer.cpp:3908
_
Definition: mqv.h:13
exception thrown by a class if a non-implemented method is called
Definition: cryptlib.h:166
const char * GroupOID()
OID.
Definition: argnames.h:35
void Encode(byte *output, size_t outputLen) const
encode in big-endian format
Definition: gf2n.cpp:139
multiple precision integer and basic arithmetics
Definition: integer.h:26
Elliptic Curve over GF(2^n)
Definition: ec2n.h:30
const char * SubgroupGenerator()
Integer, ECP::Point, or EC2N::Point.
Definition: argnames.h:33
void DEREncodePublicKey(BufferedTransformation &bt) const
encode subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header ...
Definition: eccrypto.cpp:636
,
Definition: dh.h:13
Elliptic Curve Parameters.
Definition: eccrypto.h:25
GF(2^n) with Pentanomial Basis.
Definition: gf2n.h:341
DER Sequence Encoder.
Definition: asn.h:187
const char * Cofactor()
Integer.
Definition: argnames.h:32
Definition: asn.h:51
virtual lword MaxRetrievable() const
returns number of bytes that is currently ready for retrieval
Definition: cryptlib.cpp:386
static const Integer & Zero()
avoid calling constructors for these frequently used integers
Definition: integer.cpp:2862
const char * Curve()
ECP or EC2N.
Definition: argnames.h:34
BER General Decoder.
Definition: asn.h:128
Object Identifier.
Definition: asn.h:82
const char * SubgroupOrder()
Integer.
Definition: argnames.h:31
void BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size)
decode subjectPublicKey part of subjectPublicKeyInfo, without the BIT STRING header ...
Definition: eccrypto.cpp:627
void BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size)
decode privateKey part of privateKeyInfo, without the OCTET STRING header
Definition: eccrypto.cpp:644
interface for retrieving values given their names
Definition: cryptlib.h:225
A template implementing constructors for public key algorithm classes.
Definition: pubkey.h:1488