1 | // eccrypto.cpp - written and placed in the public domain by Wei Dai |
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2 | |
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3 | #include "pch.h" |
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4 | |
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5 | #include "config.h" |
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6 | |
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7 | #if CRYPTOPP_MSC_VERSION |
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8 | # pragma warning(push) |
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9 | # pragma warning(disable: 4127 4189) |
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10 | #endif |
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11 | |
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12 | #if CRYPTOPP_GCC_DIAGNOSTIC_AVAILABLE |
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13 | # pragma GCC diagnostic push |
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14 | # pragma GCC diagnostic ignored "-Wunused-function" |
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15 | #endif |
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16 | |
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17 | #ifndef CRYPTOPP_IMPORTS |
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18 | |
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19 | #include "eccrypto.h" |
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20 | #include "integer.h" |
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21 | #include "nbtheory.h" |
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22 | #include "filters.h" |
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23 | #include "argnames.h" |
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24 | #include "smartptr.h" |
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25 | #include "oids.h" |
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26 | #include "asn.h" |
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27 | #include "hex.h" |
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28 | #include "ec2n.h" |
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29 | #include "misc.h" |
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30 | |
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31 | NAMESPACE_BEGIN(CryptoPP) |
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32 | |
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33 | #if 0 |
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34 | #if CRYPTOPP_DEBUG && !defined(CRYPTOPP_DOXYGEN_PROCESSING) |
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35 | static void ECDSA_TestInstantiations() |
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36 | { |
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37 | ECDSA<EC2N>::Signer t1; |
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38 | ECDSA<EC2N>::Verifier t2(t1); |
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39 | ECNR<ECP>::Signer t3; |
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40 | ECNR<ECP>::Verifier t4(t3); |
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41 | ECIES<ECP>::Encryptor t5; |
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42 | ECIES<EC2N>::Decryptor t6; |
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43 | ECDH<ECP>::Domain t7; |
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44 | ECMQV<ECP>::Domain t8; |
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45 | } |
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46 | #endif |
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47 | #endif |
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48 | |
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49 | // VC60 workaround: complains when these functions are put into an anonymous namespace |
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50 | static Integer ConvertToInteger(const PolynomialMod2 &x) |
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51 | { |
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52 | unsigned int l = x.ByteCount(); |
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53 | SecByteBlock temp(l); |
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54 | x.Encode(temp, l); |
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55 | return Integer(temp, l); |
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56 | } |
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57 | |
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58 | static inline Integer ConvertToInteger(const Integer &x) |
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59 | { |
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60 | return x; |
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61 | } |
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62 | |
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63 | static bool CheckMOVCondition(const Integer &q, const Integer &r) |
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64 | { |
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65 | // see "Updated standards for validating elliptic curves", http://eprint.iacr.org/2007/343 |
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66 | Integer t = 1; |
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67 | unsigned int n = q.IsEven() ? 1 : q.BitCount(), m = r.BitCount(); |
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68 | |
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69 | for (unsigned int i=n; DiscreteLogWorkFactor(i)<m/2; i+=n) |
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70 | { |
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71 | if (q.IsEven()) |
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72 | t = (t+t)%r; |
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73 | else |
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74 | t = (t*q)%r; |
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75 | if (t == 1) |
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76 | return false; |
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77 | } |
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78 | return true; |
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79 | } |
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80 | |
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81 | // ****************************************************************** |
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82 | |
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83 | template <class T> struct EcRecommendedParameters; |
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84 | |
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85 | template<> struct EcRecommendedParameters<EC2N> |
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86 | { |
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87 | 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) |
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88 | : oid(oid), t0(0), t1(0), t2(t2), t3(t3), t4(t4), a(a), b(b), g(g), n(n), h(h) {} |
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89 | 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) |
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90 | : oid(oid), t0(t0), t1(t1), t2(t2), t3(t3), t4(t4), a(a), b(b), g(g), n(n), h(h) {} |
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91 | EC2N *NewEC() const |
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92 | { |
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93 | StringSource ssA(a, true, new HexDecoder); |
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94 | StringSource ssB(b, true, new HexDecoder); |
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95 | if (t0 == 0) |
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96 | return new EC2N(GF2NT(t2, t3, t4), EC2N::FieldElement(ssA, (size_t)ssA.MaxRetrievable()), EC2N::FieldElement(ssB, (size_t)ssB.MaxRetrievable())); |
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97 | else |
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98 | return new EC2N(GF2NPP(t0, t1, t2, t3, t4), EC2N::FieldElement(ssA, (size_t)ssA.MaxRetrievable()), EC2N::FieldElement(ssB, (size_t)ssB.MaxRetrievable())); |
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99 | }; |
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100 | |
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101 | OID oid; |
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102 | unsigned int t0, t1, t2, t3, t4; |
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103 | const char *a, *b, *g, *n; |
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104 | unsigned int h; |
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105 | }; |
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106 | |
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107 | template<> struct EcRecommendedParameters<ECP> |
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108 | { |
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109 | EcRecommendedParameters(const OID &oid, const char *p, const char *a, const char *b, const char *g, const char *n, unsigned int h) |
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110 | : oid(oid), p(p), a(a), b(b), g(g), n(n), h(h) {} |
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111 | ECP *NewEC() const |
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112 | { |
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113 | StringSource ssP(p, true, new HexDecoder); |
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114 | StringSource ssA(a, true, new HexDecoder); |
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115 | StringSource ssB(b, true, new HexDecoder); |
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116 | return new ECP(Integer(ssP, (size_t)ssP.MaxRetrievable()), ECP::FieldElement(ssA, (size_t)ssA.MaxRetrievable()), ECP::FieldElement(ssB, (size_t)ssB.MaxRetrievable())); |
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117 | }; |
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118 | |
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119 | OID oid; |
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120 | const char *p; |
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121 | const char *a, *b, *g, *n; |
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122 | unsigned int h; |
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123 | }; |
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124 | |
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125 | struct OIDLessThan |
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126 | { |
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127 | template <typename T> |
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128 | inline bool operator()(const EcRecommendedParameters<T>& a, const OID& b) {return a.oid < b;} |
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129 | template <typename T> |
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130 | inline bool operator()(const OID& a, const EcRecommendedParameters<T>& b) {return a < b.oid;} |
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131 | template <typename T> |
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132 | inline bool operator()(const EcRecommendedParameters<T>& a, const EcRecommendedParameters<T>& b) {return a.oid < b.oid;} |
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133 | }; |
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134 | |
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135 | static void GetRecommendedParameters(const EcRecommendedParameters<EC2N> *&begin, const EcRecommendedParameters<EC2N> *&end) |
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136 | { |
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137 | // this array must be sorted by OID |
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138 | static const EcRecommendedParameters<EC2N> rec[] = { |
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139 | EcRecommendedParameters<EC2N>(ASN1::sect163k1(), |
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140 | 163, 7, 6, 3, 0, |
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141 | "000000000000000000000000000000000000000001", |
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142 | "000000000000000000000000000000000000000001", |
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143 | "0402FE13C0537BBC11ACAA07D793DE4E6D5E5C94EEE80289070FB05D38FF58321F2E800536D538CCDAA3D9", |
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144 | "04000000000000000000020108A2E0CC0D99F8A5EF", |
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145 | 2), |
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146 | EcRecommendedParameters<EC2N>(ASN1::sect163r1(), |
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147 | 163, 7, 6, 3, 0, |
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148 | "07B6882CAAEFA84F9554FF8428BD88E246D2782AE2", |
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149 | "0713612DCDDCB40AAB946BDA29CA91F73AF958AFD9", |
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150 | "040369979697AB43897789566789567F787A7876A65400435EDB42EFAFB2989D51FEFCE3C80988F41FF883", |
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151 | "03FFFFFFFFFFFFFFFFFFFF48AAB689C29CA710279B", |
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152 | 2), |
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153 | EcRecommendedParameters<EC2N>(ASN1::sect239k1(), |
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154 | 239, 158, 0, |
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155 | "000000000000000000000000000000000000000000000000000000000000", |
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156 | "000000000000000000000000000000000000000000000000000000000001", |
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157 | "0429A0B6A887A983E9730988A68727A8B2D126C44CC2CC7B2A6555193035DC76310804F12E549BDB011C103089E73510ACB275FC312A5DC6B76553F0CA", |
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158 | "2000000000000000000000000000005A79FEC67CB6E91F1C1DA800E478A5", |
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159 | 4), |
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160 | EcRecommendedParameters<EC2N>(ASN1::sect113r1(), |
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161 | 113, 9, 0, |
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162 | "003088250CA6E7C7FE649CE85820F7", |
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163 | "00E8BEE4D3E2260744188BE0E9C723", |
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164 | "04009D73616F35F4AB1407D73562C10F00A52830277958EE84D1315ED31886", |
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165 | "0100000000000000D9CCEC8A39E56F", |
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166 | 2), |
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167 | EcRecommendedParameters<EC2N>(ASN1::sect113r2(), |
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168 | 113, 9, 0, |
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169 | "00689918DBEC7E5A0DD6DFC0AA55C7", |
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170 | "0095E9A9EC9B297BD4BF36E059184F", |
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171 | "0401A57A6A7B26CA5EF52FCDB816479700B3ADC94ED1FE674C06E695BABA1D", |
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172 | "010000000000000108789B2496AF93", |
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173 | 2), |
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174 | EcRecommendedParameters<EC2N>(ASN1::sect163r2(), |
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175 | 163, 7, 6, 3, 0, |
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176 | "000000000000000000000000000000000000000001", |
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177 | "020A601907B8C953CA1481EB10512F78744A3205FD", |
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178 | "0403F0EBA16286A2D57EA0991168D4994637E8343E3600D51FBC6C71A0094FA2CDD545B11C5C0C797324F1", |
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179 | "040000000000000000000292FE77E70C12A4234C33", |
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180 | 2), |
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181 | EcRecommendedParameters<EC2N>(ASN1::sect283k1(), |
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182 | 283, 12, 7, 5, 0, |
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183 | "000000000000000000000000000000000000000000000000000000000000000000000000", |
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184 | "000000000000000000000000000000000000000000000000000000000000000000000001", |
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185 | "040503213F78CA44883F1A3B8162F188E553CD265F23C1567A16876913B0C2AC245849283601CCDA380F1C9E318D90F95D07E5426FE87E45C0E8184698E45962364E34116177DD2259", |
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186 | "01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE9AE2ED07577265DFF7F94451E061E163C61", |
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187 | 4), |
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188 | EcRecommendedParameters<EC2N>(ASN1::sect283r1(), |
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189 | 283, 12, 7, 5, 0, |
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190 | "000000000000000000000000000000000000000000000000000000000000000000000001", |
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191 | "027B680AC8B8596DA5A4AF8A19A0303FCA97FD7645309FA2A581485AF6263E313B79A2F5", |
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192 | "0405F939258DB7DD90E1934F8C70B0DFEC2EED25B8557EAC9C80E2E198F8CDBECD86B1205303676854FE24141CB98FE6D4B20D02B4516FF702350EDDB0826779C813F0DF45BE8112F4", |
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193 | "03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEF90399660FC938A90165B042A7CEFADB307", |
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194 | 2), |
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195 | EcRecommendedParameters<EC2N>(ASN1::sect131r1(), |
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196 | 131, 8, 3, 2, 0, |
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197 | "07A11B09A76B562144418FF3FF8C2570B8", |
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198 | "0217C05610884B63B9C6C7291678F9D341", |
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199 | "040081BAF91FDF9833C40F9C181343638399078C6E7EA38C001F73C8134B1B4EF9E150", |
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200 | "0400000000000000023123953A9464B54D", |
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201 | 2), |
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202 | EcRecommendedParameters<EC2N>(ASN1::sect131r2(), |
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203 | 131, 8, 3, 2, 0, |
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204 | "03E5A88919D7CAFCBF415F07C2176573B2", |
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205 | "04B8266A46C55657AC734CE38F018F2192", |
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206 | "040356DCD8F2F95031AD652D23951BB366A80648F06D867940A5366D9E265DE9EB240F", |
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207 | "0400000000000000016954A233049BA98F", |
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208 | 2), |
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209 | EcRecommendedParameters<EC2N>(ASN1::sect193r1(), |
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210 | 193, 15, 0, |
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211 | "0017858FEB7A98975169E171F77B4087DE098AC8A911DF7B01", |
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212 | "00FDFB49BFE6C3A89FACADAA7A1E5BBC7CC1C2E5D831478814", |
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213 | "0401F481BC5F0FF84A74AD6CDF6FDEF4BF6179625372D8C0C5E10025E399F2903712CCF3EA9E3A1AD17FB0B3201B6AF7CE1B05", |
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214 | "01000000000000000000000000C7F34A778F443ACC920EBA49", |
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215 | 2), |
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216 | EcRecommendedParameters<EC2N>(ASN1::sect193r2(), |
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217 | 193, 15, 0, |
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218 | "0163F35A5137C2CE3EA6ED8667190B0BC43ECD69977702709B", |
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219 | "00C9BB9E8927D4D64C377E2AB2856A5B16E3EFB7F61D4316AE", |
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220 | "0400D9B67D192E0367C803F39E1A7E82CA14A651350AAE617E8F01CE94335607C304AC29E7DEFBD9CA01F596F927224CDECF6C", |
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221 | "010000000000000000000000015AAB561B005413CCD4EE99D5", |
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222 | 2), |
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223 | EcRecommendedParameters<EC2N>(ASN1::sect233k1(), |
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224 | 233, 74, 0, |
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225 | "000000000000000000000000000000000000000000000000000000000000", |
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226 | "000000000000000000000000000000000000000000000000000000000001", |
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227 | "04017232BA853A7E731AF129F22FF4149563A419C26BF50A4C9D6EEFAD612601DB537DECE819B7F70F555A67C427A8CD9BF18AEB9B56E0C11056FAE6A3", |
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228 | "8000000000000000000000000000069D5BB915BCD46EFB1AD5F173ABDF", |
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229 | 4), |
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230 | EcRecommendedParameters<EC2N>(ASN1::sect233r1(), |
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231 | 233, 74, 0, |
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232 | "000000000000000000000000000000000000000000000000000000000001", |
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233 | "0066647EDE6C332C7F8C0923BB58213B333B20E9CE4281FE115F7D8F90AD", |
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234 | "0400FAC9DFCBAC8313BB2139F1BB755FEF65BC391F8B36F8F8EB7371FD558B01006A08A41903350678E58528BEBF8A0BEFF867A7CA36716F7E01F81052", |
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235 | "01000000000000000000000000000013E974E72F8A6922031D2603CFE0D7", |
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236 | 2), |
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237 | EcRecommendedParameters<EC2N>(ASN1::sect409k1(), |
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238 | 409, 87, 0, |
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239 | "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", |
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240 | "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", |
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241 | "040060F05F658F49C1AD3AB1890F7184210EFD0987E307C84C27ACCFB8F9F67CC2C460189EB5AAAA62EE222EB1B35540CFE902374601E369050B7C4E42ACBA1DACBF04299C3460782F918EA427E6325165E9EA10E3DA5F6C42E9C55215AA9CA27A5863EC48D8E0286B", |
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242 | "7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE5F83B2D4EA20400EC4557D5ED3E3E7CA5B4B5C83B8E01E5FCF", |
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243 | 4), |
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244 | EcRecommendedParameters<EC2N>(ASN1::sect409r1(), |
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245 | 409, 87, 0, |
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246 | "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", |
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247 | "0021A5C2C8EE9FEB5C4B9A753B7B476B7FD6422EF1F3DD674761FA99D6AC27C8A9A197B272822F6CD57A55AA4F50AE317B13545F", |
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248 | "04015D4860D088DDB3496B0C6064756260441CDE4AF1771D4DB01FFE5B34E59703DC255A868A1180515603AEAB60794E54BB7996A70061B1CFAB6BE5F32BBFA78324ED106A7636B9C5A7BD198D0158AA4F5488D08F38514F1FDF4B4F40D2181B3681C364BA0273C706", |
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249 | "010000000000000000000000000000000000000000000000000001E2AAD6A612F33307BE5FA47C3C9E052F838164CD37D9A21173", |
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250 | 2), |
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251 | EcRecommendedParameters<EC2N>(ASN1::sect571k1(), |
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252 | 571, 10, 5, 2, 0, |
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253 | "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", |
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254 | "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", |
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255 | "04026EB7A859923FBC82189631F8103FE4AC9CA2970012D5D46024804801841CA44370958493B205E647DA304DB4CEB08CBBD1BA39494776FB988B47174DCA88C7E2945283A01C89720349DC807F4FBF374F4AEADE3BCA95314DD58CEC9F307A54FFC61EFC006D8A2C9D4979C0AC44AEA74FBEBBB9F772AEDCB620B01A7BA7AF1B320430C8591984F601CD4C143EF1C7A3", |
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256 | "020000000000000000000000000000000000000000000000000000000000000000000000131850E1F19A63E4B391A8DB917F4138B630D84BE5D639381E91DEB45CFE778F637C1001", |
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257 | 4), |
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258 | EcRecommendedParameters<EC2N>(ASN1::sect571r1(), |
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259 | 571, 10, 5, 2, 0, |
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260 | "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", |
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261 | "02F40E7E2221F295DE297117B7F3D62F5C6A97FFCB8CEFF1CD6BA8CE4A9A18AD84FFABBD8EFA59332BE7AD6756A66E294AFD185A78FF12AA520E4DE739BACA0C7FFEFF7F2955727A", |
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262 | "040303001D34B856296C16C0D40D3CD7750A93D1D2955FA80AA5F40FC8DB7B2ABDBDE53950F4C0D293CDD711A35B67FB1499AE60038614F1394ABFA3B4C850D927E1E7769C8EEC2D19037BF27342DA639B6DCCFFFEB73D69D78C6C27A6009CBBCA1980F8533921E8A684423E43BAB08A576291AF8F461BB2A8B3531D2F0485C19B16E2F1516E23DD3C1A4827AF1B8AC15B", |
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263 | "03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE661CE18FF55987308059B186823851EC7DD9CA1161DE93D5174D66E8382E9BB2FE84E47", |
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264 | 2), |
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265 | }; |
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266 | begin = rec; |
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267 | end = rec + sizeof(rec)/sizeof(rec[0]); |
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268 | } |
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269 | |
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270 | static void GetRecommendedParameters(const EcRecommendedParameters<ECP> *&begin, const EcRecommendedParameters<ECP> *&end) |
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271 | { |
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272 | // this array must be sorted by OID |
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273 | static const EcRecommendedParameters<ECP> rec[] = { |
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274 | EcRecommendedParameters<ECP>(ASN1::secp192r1(), |
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275 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF", |
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276 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC", |
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277 | "64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1", |
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278 | "04188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF101207192B95FFC8DA78631011ED6B24CDD573F977A11E794811", |
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279 | "FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831", |
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280 | 1), |
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281 | EcRecommendedParameters<ECP>(ASN1::secp256r1(), |
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282 | "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF", |
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283 | "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC", |
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284 | "5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B", |
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285 | "046B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C2964FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5", |
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286 | "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551", |
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287 | 1), |
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288 | EcRecommendedParameters<ECP>(ASN1::brainpoolP160r1(), |
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289 | "E95E4A5F737059DC60DFC7AD95B3D8139515620F", |
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290 | "340E7BE2A280EB74E2BE61BADA745D97E8F7C300", |
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291 | "1E589A8595423412134FAA2DBDEC95C8D8675E58", |
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292 | "04BED5AF16EA3F6A4F62938C4631EB5AF7BDBCDBC31667CB477A1A8EC338F94741669C976316DA6321", |
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293 | "E95E4A5F737059DC60DF5991D45029409E60FC09", |
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294 | 1), |
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295 | EcRecommendedParameters<ECP>(ASN1::brainpoolP192r1(), |
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296 | "C302F41D932A36CDA7A3463093D18DB78FCE476DE1A86297", |
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297 | "6A91174076B1E0E19C39C031FE8685C1CAE040E5C69A28EF", |
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298 | "469A28EF7C28CCA3DC721D044F4496BCCA7EF4146FBF25C9", |
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299 | "04C0A0647EAAB6A48753B033C56CB0F0900A2F5C4853375FD614B690866ABD5BB88B5F4828C1490002E6773FA2FA299B8F", |
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300 | "C302F41D932A36CDA7A3462F9E9E916B5BE8F1029AC4ACC1", |
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301 | 1), |
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302 | EcRecommendedParameters<ECP>(ASN1::brainpoolP224r1(), |
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303 | "D7C134AA264366862A18302575D1D787B09F075797DA89F57EC8C0FF", |
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304 | "68A5E62CA9CE6C1C299803A6C1530B514E182AD8B0042A59CAD29F43", |
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305 | "2580F63CCFE44138870713B1A92369E33E2135D266DBB372386C400B", |
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306 | "040D9029AD2C7E5CF4340823B2A87DC68C9E4CE3174C1E6EFDEE12C07D58AA56F772C0726F24C6B89E4ECDAC24354B9E99CAA3F6D3761402CD", |
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307 | "D7C134AA264366862A18302575D0FB98D116BC4B6DDEBCA3A5A7939F", |
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308 | 1), |
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309 | EcRecommendedParameters<ECP>(ASN1::brainpoolP256r1(), |
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310 | "A9FB57DBA1EEA9BC3E660A909D838D726E3BF623D52620282013481D1F6E5377", |
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311 | "7D5A0975FC2C3057EEF67530417AFFE7FB8055C126DC5C6CE94A4B44F330B5D9", |
---|
312 | "26DC5C6CE94A4B44F330B5D9BBD77CBF958416295CF7E1CE6BCCDC18FF8C07B6", |
---|
313 | "048BD2AEB9CB7E57CB2C4B482FFC81B7AFB9DE27E1E3BD23C23A4453BD9ACE3262547EF835C3DAC4FD97F8461A14611DC9C27745132DED8E545C1D54C72F046997", |
---|
314 | "A9FB57DBA1EEA9BC3E660A909D838D718C397AA3B561A6F7901E0E82974856A7", |
---|
315 | 1), |
---|
316 | EcRecommendedParameters<ECP>(ASN1::brainpoolP320r1(), |
---|
317 | "D35E472036BC4FB7E13C785ED201E065F98FCFA6F6F40DEF4F92B9EC7893EC28FCD412B1F1B32E27", |
---|
318 | "3EE30B568FBAB0F883CCEBD46D3F3BB8A2A73513F5EB79DA66190EB085FFA9F492F375A97D860EB4", |
---|
319 | "520883949DFDBC42D3AD198640688A6FE13F41349554B49ACC31DCCD884539816F5EB4AC8FB1F1A6", |
---|
320 | "0443BD7E9AFB53D8B85289BCC48EE5BFE6F20137D10A087EB6E7871E2A10A599C710AF8D0D39E2061114FDD05545EC1CC8AB4093247F77275E0743FFED117182EAA9C77877AAAC6AC7D35245D1692E8EE1", |
---|
321 | "D35E472036BC4FB7E13C785ED201E065F98FCFA5B68F12A32D482EC7EE8658E98691555B44C59311", |
---|
322 | 1), |
---|
323 | EcRecommendedParameters<ECP>(ASN1::brainpoolP384r1(), |
---|
324 | "8CB91E82A3386D280F5D6F7E50E641DF152F7109ED5456B412B1DA197FB71123ACD3A729901D1A71874700133107EC53", |
---|
325 | "7BC382C63D8C150C3C72080ACE05AFA0C2BEA28E4FB22787139165EFBA91F90F8AA5814A503AD4EB04A8C7DD22CE2826", |
---|
326 | "04A8C7DD22CE28268B39B55416F0447C2FB77DE107DCD2A62E880EA53EEB62D57CB4390295DBC9943AB78696FA504C11", |
---|
327 | "041D1C64F068CF45FFA2A63A81B7C13F6B8847A3E77EF14FE3DB7FCAFE0CBD10E8E826E03436D646AAEF87B2E247D4AF1E8ABE1D7520F9C2A45CB1EB8E95CFD55262B70B29FEEC5864E19C054FF99129280E4646217791811142820341263C5315", |
---|
328 | "8CB91E82A3386D280F5D6F7E50E641DF152F7109ED5456B31F166E6CAC0425A7CF3AB6AF6B7FC3103B883202E9046565", |
---|
329 | 1), |
---|
330 | EcRecommendedParameters<ECP>(ASN1::brainpoolP512r1(), |
---|
331 | "AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA703308717D4D9B009BC66842AECDA12AE6A380E62881FF2F2D82C68528AA6056583A48F3", |
---|
332 | "7830A3318B603B89E2327145AC234CC594CBDD8D3DF91610A83441CAEA9863BC2DED5D5AA8253AA10A2EF1C98B9AC8B57F1117A72BF2C7B9E7C1AC4D77FC94CA", |
---|
333 | "3DF91610A83441CAEA9863BC2DED5D5AA8253AA10A2EF1C98B9AC8B57F1117A72BF2C7B9E7C1AC4D77FC94CADC083E67984050B75EBAE5DD2809BD638016F723", |
---|
334 | "0481AEE4BDD82ED9645A21322E9C4C6A9385ED9F70B5D916C1B43B62EEF4D0098EFF3B1F78E2D0D48D50D1687B93B97D5F7C6D5047406A5E688B352209BCB9F8227DDE385D566332ECC0EABFA9CF7822FDF209F70024A57B1AA000C55B881F8111B2DCDE494A5F485E5BCA4BD88A2763AED1CA2B2FA8F0540678CD1E0F3AD80892", |
---|
335 | "AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA70330870553E5C414CA92619418661197FAC10471DB1D381085DDADDB58796829CA90069", |
---|
336 | 1), |
---|
337 | EcRecommendedParameters<ECP>(ASN1::secp112r1(), |
---|
338 | "DB7C2ABF62E35E668076BEAD208B", |
---|
339 | "DB7C2ABF62E35E668076BEAD2088", |
---|
340 | "659EF8BA043916EEDE8911702B22", |
---|
341 | "0409487239995A5EE76B55F9C2F098A89CE5AF8724C0A23E0E0FF77500", |
---|
342 | "DB7C2ABF62E35E7628DFAC6561C5", |
---|
343 | 1), |
---|
344 | EcRecommendedParameters<ECP>(ASN1::secp112r2(), |
---|
345 | "DB7C2ABF62E35E668076BEAD208B", |
---|
346 | "6127C24C05F38A0AAAF65C0EF02C", |
---|
347 | "51DEF1815DB5ED74FCC34C85D709", |
---|
348 | "044BA30AB5E892B4E1649DD0928643ADCD46F5882E3747DEF36E956E97", |
---|
349 | "36DF0AAFD8B8D7597CA10520D04B", |
---|
350 | 4), |
---|
351 | EcRecommendedParameters<ECP>(ASN1::secp160r1(), |
---|
352 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF", |
---|
353 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC", |
---|
354 | "1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45", |
---|
355 | "044A96B5688EF573284664698968C38BB913CBFC8223A628553168947D59DCC912042351377AC5FB32", |
---|
356 | "0100000000000000000001F4C8F927AED3CA752257", |
---|
357 | 1), |
---|
358 | EcRecommendedParameters<ECP>(ASN1::secp160k1(), |
---|
359 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73", |
---|
360 | "0000000000000000000000000000000000000000", |
---|
361 | "0000000000000000000000000000000000000007", |
---|
362 | "043B4C382CE37AA192A4019E763036F4F5DD4D7EBB938CF935318FDCED6BC28286531733C3F03C4FEE", |
---|
363 | "0100000000000000000001B8FA16DFAB9ACA16B6B3", |
---|
364 | 1), |
---|
365 | EcRecommendedParameters<ECP>(ASN1::secp256k1(), |
---|
366 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F", |
---|
367 | "0000000000000000000000000000000000000000000000000000000000000000", |
---|
368 | "0000000000000000000000000000000000000000000000000000000000000007", |
---|
369 | "0479BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8", |
---|
370 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141", |
---|
371 | 1), |
---|
372 | EcRecommendedParameters<ECP>(ASN1::secp128r1(), |
---|
373 | "FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF", |
---|
374 | "FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFC", |
---|
375 | "E87579C11079F43DD824993C2CEE5ED3", |
---|
376 | "04161FF7528B899B2D0C28607CA52C5B86CF5AC8395BAFEB13C02DA292DDED7A83", |
---|
377 | "FFFFFFFE0000000075A30D1B9038A115", |
---|
378 | 1), |
---|
379 | EcRecommendedParameters<ECP>(ASN1::secp128r2(), |
---|
380 | "FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF", |
---|
381 | "D6031998D1B3BBFEBF59CC9BBFF9AEE1", |
---|
382 | "5EEEFCA380D02919DC2C6558BB6D8A5D", |
---|
383 | "047B6AA5D85E572983E6FB32A7CDEBC14027B6916A894D3AEE7106FE805FC34B44", |
---|
384 | "3FFFFFFF7FFFFFFFBE0024720613B5A3", |
---|
385 | 4), |
---|
386 | EcRecommendedParameters<ECP>(ASN1::secp160r2(), |
---|
387 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73", |
---|
388 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC70", |
---|
389 | "B4E134D3FB59EB8BAB57274904664D5AF50388BA", |
---|
390 | "0452DCB034293A117E1F4FF11B30F7199D3144CE6DFEAFFEF2E331F296E071FA0DF9982CFEA7D43F2E", |
---|
391 | "0100000000000000000000351EE786A818F3A1A16B", |
---|
392 | 1), |
---|
393 | EcRecommendedParameters<ECP>(ASN1::secp192k1(), |
---|
394 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37", |
---|
395 | "000000000000000000000000000000000000000000000000", |
---|
396 | "000000000000000000000000000000000000000000000003", |
---|
397 | "04DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D", |
---|
398 | "FFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D", |
---|
399 | 1), |
---|
400 | EcRecommendedParameters<ECP>(ASN1::secp224k1(), |
---|
401 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFE56D", |
---|
402 | "00000000000000000000000000000000000000000000000000000000", |
---|
403 | "00000000000000000000000000000000000000000000000000000005", |
---|
404 | "04A1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C7E089FED7FBA344282CAFBD6F7E319F7C0B0BD59E2CA4BDB556D61A5", |
---|
405 | "010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7", |
---|
406 | 1), |
---|
407 | EcRecommendedParameters<ECP>(ASN1::secp224r1(), |
---|
408 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001", |
---|
409 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE", |
---|
410 | "B4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4", |
---|
411 | "04B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21BD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34", |
---|
412 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D", |
---|
413 | 1), |
---|
414 | EcRecommendedParameters<ECP>(ASN1::secp384r1(), |
---|
415 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF", |
---|
416 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC", |
---|
417 | "B3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF", |
---|
418 | "04AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB73617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A147CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F", |
---|
419 | "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973", |
---|
420 | 1), |
---|
421 | EcRecommendedParameters<ECP>(ASN1::secp521r1(), |
---|
422 | "01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", |
---|
423 | "01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC", |
---|
424 | "0051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00", |
---|
425 | "0400C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66011839296A789A3BC0045C8A5FB42C7D1BD998F54449579B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C7086A272C24088BE94769FD16650", |
---|
426 | "01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409", |
---|
427 | 1), |
---|
428 | }; |
---|
429 | begin = rec; |
---|
430 | end = rec + sizeof(rec)/sizeof(rec[0]); |
---|
431 | } |
---|
432 | |
---|
433 | template <class EC> OID DL_GroupParameters_EC<EC>::GetNextRecommendedParametersOID(const OID &oid) |
---|
434 | { |
---|
435 | const EcRecommendedParameters<EllipticCurve> *begin, *end; |
---|
436 | GetRecommendedParameters(begin, end); |
---|
437 | const EcRecommendedParameters<EllipticCurve> *it = std::upper_bound(begin, end, oid, OIDLessThan()); |
---|
438 | return (it == end ? OID() : it->oid); |
---|
439 | } |
---|
440 | |
---|
441 | template <class EC> void DL_GroupParameters_EC<EC>::Initialize(const OID &oid) |
---|
442 | { |
---|
443 | const EcRecommendedParameters<EllipticCurve> *begin, *end; |
---|
444 | GetRecommendedParameters(begin, end); |
---|
445 | const EcRecommendedParameters<EllipticCurve> *it = std::lower_bound(begin, end, oid, OIDLessThan()); |
---|
446 | if (it == end || it->oid != oid) |
---|
447 | throw UnknownOID(); |
---|
448 | |
---|
449 | const EcRecommendedParameters<EllipticCurve> ¶m = *it; |
---|
450 | m_oid = oid; |
---|
451 | member_ptr<EllipticCurve> ec(param.NewEC()); |
---|
452 | this->m_groupPrecomputation.SetCurve(*ec); |
---|
453 | |
---|
454 | StringSource ssG(param.g, true, new HexDecoder); |
---|
455 | Element G; |
---|
456 | bool result = GetCurve().DecodePoint(G, ssG, (size_t)ssG.MaxRetrievable()); |
---|
457 | this->SetSubgroupGenerator(G); |
---|
458 | |
---|
459 | // TODO: this fails in practice. Should it throw? |
---|
460 | CRYPTOPP_UNUSED(result); CRYPTOPP_ASSERT(result); |
---|
461 | |
---|
462 | StringSource ssN(param.n, true, new HexDecoder); |
---|
463 | m_n.Decode(ssN, (size_t)ssN.MaxRetrievable()); |
---|
464 | m_k = param.h; |
---|
465 | } |
---|
466 | |
---|
467 | template <class EC> |
---|
468 | bool DL_GroupParameters_EC<EC>::GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const |
---|
469 | { |
---|
470 | if (strcmp(name, Name::GroupOID()) == 0) |
---|
471 | { |
---|
472 | if (m_oid.m_values.empty()) |
---|
473 | return false; |
---|
474 | |
---|
475 | this->ThrowIfTypeMismatch(name, typeid(OID), valueType); |
---|
476 | *reinterpret_cast<OID *>(pValue) = m_oid; |
---|
477 | return true; |
---|
478 | } |
---|
479 | else |
---|
480 | return GetValueHelper<DL_GroupParameters<Element> >(this, name, valueType, pValue).Assignable() |
---|
481 | CRYPTOPP_GET_FUNCTION_ENTRY(Curve); |
---|
482 | } |
---|
483 | |
---|
484 | template <class EC> |
---|
485 | void DL_GroupParameters_EC<EC>::AssignFrom(const NameValuePairs &source) |
---|
486 | { |
---|
487 | OID oid; |
---|
488 | if (source.GetValue(Name::GroupOID(), oid)) |
---|
489 | Initialize(oid); |
---|
490 | else |
---|
491 | { |
---|
492 | EllipticCurve ec; |
---|
493 | Point G; |
---|
494 | Integer n; |
---|
495 | |
---|
496 | source.GetRequiredParameter("DL_GroupParameters_EC<EC>", Name::Curve(), ec); |
---|
497 | source.GetRequiredParameter("DL_GroupParameters_EC<EC>", Name::SubgroupGenerator(), G); |
---|
498 | source.GetRequiredParameter("DL_GroupParameters_EC<EC>", Name::SubgroupOrder(), n); |
---|
499 | Integer k = source.GetValueWithDefault(Name::Cofactor(), Integer::Zero()); |
---|
500 | |
---|
501 | Initialize(ec, G, n, k); |
---|
502 | } |
---|
503 | } |
---|
504 | |
---|
505 | template <class EC> |
---|
506 | void DL_GroupParameters_EC<EC>::GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg) |
---|
507 | { |
---|
508 | try |
---|
509 | { |
---|
510 | CRYPTOPP_UNUSED(rng); |
---|
511 | AssignFrom(alg); |
---|
512 | } |
---|
513 | catch (InvalidArgument &) |
---|
514 | { |
---|
515 | throw NotImplemented("DL_GroupParameters_EC<EC>: curve generation is not implemented yet"); |
---|
516 | } |
---|
517 | } |
---|
518 | |
---|
519 | template <class EC> |
---|
520 | void DL_GroupParameters_EC<EC>::BERDecode(BufferedTransformation &bt) |
---|
521 | { |
---|
522 | byte b; |
---|
523 | if (!bt.Peek(b)) |
---|
524 | BERDecodeError(); |
---|
525 | if (b == OBJECT_IDENTIFIER) |
---|
526 | Initialize(OID(bt)); |
---|
527 | else |
---|
528 | { |
---|
529 | BERSequenceDecoder seq(bt); |
---|
530 | word32 version; |
---|
531 | BERDecodeUnsigned<word32>(seq, version, INTEGER, 1, 1); // check version |
---|
532 | EllipticCurve ec(seq); |
---|
533 | Point G = ec.BERDecodePoint(seq); |
---|
534 | Integer n(seq); |
---|
535 | Integer k; |
---|
536 | bool cofactorPresent = !seq.EndReached(); |
---|
537 | if (cofactorPresent) |
---|
538 | k.BERDecode(seq); |
---|
539 | else |
---|
540 | k = Integer::Zero(); |
---|
541 | seq.MessageEnd(); |
---|
542 | |
---|
543 | Initialize(ec, G, n, k); |
---|
544 | } |
---|
545 | } |
---|
546 | |
---|
547 | template <class EC> |
---|
548 | void DL_GroupParameters_EC<EC>::DEREncode(BufferedTransformation &bt) const |
---|
549 | { |
---|
550 | if (m_encodeAsOID && !m_oid.m_values.empty()) |
---|
551 | m_oid.DEREncode(bt); |
---|
552 | else |
---|
553 | { |
---|
554 | DERSequenceEncoder seq(bt); |
---|
555 | DEREncodeUnsigned<word32>(seq, 1); // version |
---|
556 | GetCurve().DEREncode(seq); |
---|
557 | GetCurve().DEREncodePoint(seq, this->GetSubgroupGenerator(), m_compress); |
---|
558 | m_n.DEREncode(seq); |
---|
559 | if (m_k.NotZero()) |
---|
560 | m_k.DEREncode(seq); |
---|
561 | seq.MessageEnd(); |
---|
562 | } |
---|
563 | } |
---|
564 | |
---|
565 | template <class EC> |
---|
566 | Integer DL_GroupParameters_EC<EC>::GetCofactor() const |
---|
567 | { |
---|
568 | if (!m_k) |
---|
569 | { |
---|
570 | Integer q = GetCurve().FieldSize(); |
---|
571 | Integer qSqrt = q.SquareRoot(); |
---|
572 | m_k = (q+2*qSqrt+1)/m_n; |
---|
573 | } |
---|
574 | |
---|
575 | return m_k; |
---|
576 | } |
---|
577 | |
---|
578 | template <class EC> |
---|
579 | Integer DL_GroupParameters_EC<EC>::ConvertElementToInteger(const Element &element) const |
---|
580 | { |
---|
581 | return ConvertToInteger(element.x); |
---|
582 | }; |
---|
583 | |
---|
584 | template <class EC> |
---|
585 | bool DL_GroupParameters_EC<EC>::ValidateGroup(RandomNumberGenerator &rng, unsigned int level) const |
---|
586 | { |
---|
587 | bool pass = GetCurve().ValidateParameters(rng, level); |
---|
588 | |
---|
589 | Integer q = GetCurve().FieldSize(); |
---|
590 | pass = pass && m_n!=q; |
---|
591 | |
---|
592 | if (level >= 2) |
---|
593 | { |
---|
594 | Integer qSqrt = q.SquareRoot(); |
---|
595 | pass = pass && m_n>4*qSqrt; |
---|
596 | pass = pass && VerifyPrime(rng, m_n, level-2); |
---|
597 | pass = pass && (m_k.IsZero() || m_k == (q+2*qSqrt+1)/m_n); |
---|
598 | pass = pass && CheckMOVCondition(q, m_n); |
---|
599 | } |
---|
600 | |
---|
601 | return pass; |
---|
602 | } |
---|
603 | |
---|
604 | template <class EC> |
---|
605 | bool DL_GroupParameters_EC<EC>::ValidateElement(unsigned int level, const Element &g, const DL_FixedBasePrecomputation<Element> *gpc) const |
---|
606 | { |
---|
607 | bool pass = !IsIdentity(g) && GetCurve().VerifyPoint(g); |
---|
608 | if (level >= 1) |
---|
609 | { |
---|
610 | if (gpc) |
---|
611 | pass = pass && gpc->Exponentiate(this->GetGroupPrecomputation(), Integer::One()) == g; |
---|
612 | } |
---|
613 | if (level >= 2 && pass) |
---|
614 | { |
---|
615 | const Integer &q = GetSubgroupOrder(); |
---|
616 | Element gq = gpc ? gpc->Exponentiate(this->GetGroupPrecomputation(), q) : this->ExponentiateElement(g, q); |
---|
617 | pass = pass && IsIdentity(gq); |
---|
618 | } |
---|
619 | return pass; |
---|
620 | } |
---|
621 | |
---|
622 | template <class EC> |
---|
623 | void DL_GroupParameters_EC<EC>::SimultaneousExponentiate(Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const |
---|
624 | { |
---|
625 | GetCurve().SimultaneousMultiply(results, base, exponents, exponentsCount); |
---|
626 | } |
---|
627 | |
---|
628 | template <class EC> |
---|
629 | CPP_TYPENAME DL_GroupParameters_EC<EC>::Element DL_GroupParameters_EC<EC>::MultiplyElements(const Element &a, const Element &b) const |
---|
630 | { |
---|
631 | return GetCurve().Add(a, b); |
---|
632 | } |
---|
633 | |
---|
634 | template <class EC> |
---|
635 | 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 |
---|
636 | { |
---|
637 | return GetCurve().CascadeMultiply(exponent1, element1, exponent2, element2); |
---|
638 | } |
---|
639 | |
---|
640 | template <class EC> |
---|
641 | OID DL_GroupParameters_EC<EC>::GetAlgorithmID() const |
---|
642 | { |
---|
643 | return ASN1::id_ecPublicKey(); |
---|
644 | } |
---|
645 | |
---|
646 | // ****************************************************************** |
---|
647 | |
---|
648 | template <class EC> |
---|
649 | void DL_PublicKey_EC<EC>::BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size) |
---|
650 | { |
---|
651 | CRYPTOPP_UNUSED(parametersPresent); |
---|
652 | |
---|
653 | typename EC::Point P; |
---|
654 | if (!this->GetGroupParameters().GetCurve().DecodePoint(P, bt, size)) |
---|
655 | BERDecodeError(); |
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656 | this->SetPublicElement(P); |
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657 | } |
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658 | |
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659 | template <class EC> |
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660 | void DL_PublicKey_EC<EC>::DEREncodePublicKey(BufferedTransformation &bt) const |
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661 | { |
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662 | this->GetGroupParameters().GetCurve().EncodePoint(bt, this->GetPublicElement(), this->GetGroupParameters().GetPointCompression()); |
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663 | } |
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664 | |
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665 | // ****************************************************************** |
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666 | |
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667 | template <class EC> |
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668 | void DL_PrivateKey_EC<EC>::BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size) |
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669 | { |
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670 | CRYPTOPP_UNUSED(size); |
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671 | BERSequenceDecoder seq(bt); |
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672 | word32 version; |
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673 | BERDecodeUnsigned<word32>(seq, version, INTEGER, 1, 1); // check version |
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674 | |
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675 | BERGeneralDecoder dec(seq, OCTET_STRING); |
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676 | if (!dec.IsDefiniteLength()) |
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677 | BERDecodeError(); |
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678 | Integer x; |
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679 | x.Decode(dec, (size_t)dec.RemainingLength()); |
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680 | dec.MessageEnd(); |
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681 | if (!parametersPresent && seq.PeekByte() != (CONTEXT_SPECIFIC | CONSTRUCTED | 0)) |
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682 | BERDecodeError(); |
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683 | if (!seq.EndReached() && seq.PeekByte() == (CONTEXT_SPECIFIC | CONSTRUCTED | 0)) |
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684 | { |
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685 | BERGeneralDecoder parameters(seq, CONTEXT_SPECIFIC | CONSTRUCTED | 0); |
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686 | this->AccessGroupParameters().BERDecode(parameters); |
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687 | parameters.MessageEnd(); |
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688 | } |
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689 | if (!seq.EndReached()) |
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690 | { |
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691 | // skip over the public element |
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692 | SecByteBlock subjectPublicKey; |
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693 | unsigned int unusedBits; |
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694 | BERGeneralDecoder publicKey(seq, CONTEXT_SPECIFIC | CONSTRUCTED | 1); |
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695 | BERDecodeBitString(publicKey, subjectPublicKey, unusedBits); |
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696 | publicKey.MessageEnd(); |
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697 | Element Q; |
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698 | if (!(unusedBits == 0 && this->GetGroupParameters().GetCurve().DecodePoint(Q, subjectPublicKey, subjectPublicKey.size()))) |
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699 | BERDecodeError(); |
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700 | } |
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701 | seq.MessageEnd(); |
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702 | |
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703 | this->SetPrivateExponent(x); |
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704 | } |
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705 | |
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706 | template <class EC> |
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707 | void DL_PrivateKey_EC<EC>::DEREncodePrivateKey(BufferedTransformation &bt) const |
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708 | { |
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709 | DERSequenceEncoder privateKey(bt); |
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710 | DEREncodeUnsigned<word32>(privateKey, 1); // version |
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711 | // SEC 1 ver 1.0 says privateKey (m_d) has the same length as order of the curve |
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712 | // this will be changed to order of base point in a future version |
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713 | this->GetPrivateExponent().DEREncodeAsOctetString(privateKey, this->GetGroupParameters().GetSubgroupOrder().ByteCount()); |
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714 | privateKey.MessageEnd(); |
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715 | } |
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716 | |
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717 | NAMESPACE_END |
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718 | |
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719 | #endif |
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