Mercurial > trustbridge > nss-cmake-static
annotate nss/lib/freebl/ecl/ecl.c @ 4:b513267f632f tip
Build DBM module
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Tue, 05 Aug 2014 18:58:03 +0200 |
parents | 1e5118fa0cb1 |
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rev | line source |
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0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public |
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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4 |
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5 #include "mpi.h" |
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6 #include "mplogic.h" |
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7 #include "ecl.h" |
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8 #include "ecl-priv.h" |
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9 #include "ec2.h" |
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10 #include "ecp.h" |
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11 #include <stdlib.h> |
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12 #include <string.h> |
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13 |
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14 /* Allocate memory for a new ECGroup object. */ |
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15 ECGroup * |
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16 ECGroup_new() |
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17 { |
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18 mp_err res = MP_OKAY; |
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19 ECGroup *group; |
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20 group = (ECGroup *) malloc(sizeof(ECGroup)); |
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21 if (group == NULL) |
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22 return NULL; |
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23 group->constructed = MP_YES; |
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24 group->meth = NULL; |
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25 group->text = NULL; |
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26 MP_DIGITS(&group->curvea) = 0; |
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27 MP_DIGITS(&group->curveb) = 0; |
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28 MP_DIGITS(&group->genx) = 0; |
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29 MP_DIGITS(&group->geny) = 0; |
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30 MP_DIGITS(&group->order) = 0; |
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31 group->base_point_mul = NULL; |
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32 group->points_mul = NULL; |
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33 group->validate_point = NULL; |
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34 group->extra1 = NULL; |
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35 group->extra2 = NULL; |
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36 group->extra_free = NULL; |
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37 MP_CHECKOK(mp_init(&group->curvea)); |
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38 MP_CHECKOK(mp_init(&group->curveb)); |
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39 MP_CHECKOK(mp_init(&group->genx)); |
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40 MP_CHECKOK(mp_init(&group->geny)); |
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41 MP_CHECKOK(mp_init(&group->order)); |
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42 |
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43 CLEANUP: |
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44 if (res != MP_OKAY) { |
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45 ECGroup_free(group); |
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46 return NULL; |
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47 } |
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48 return group; |
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49 } |
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50 |
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51 /* Construct a generic ECGroup for elliptic curves over prime fields. */ |
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52 ECGroup * |
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53 ECGroup_consGFp(const mp_int *irr, const mp_int *curvea, |
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54 const mp_int *curveb, const mp_int *genx, |
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55 const mp_int *geny, const mp_int *order, int cofactor) |
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56 { |
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57 mp_err res = MP_OKAY; |
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58 ECGroup *group = NULL; |
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59 |
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60 group = ECGroup_new(); |
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61 if (group == NULL) |
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62 return NULL; |
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63 |
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64 group->meth = GFMethod_consGFp(irr); |
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65 if (group->meth == NULL) { |
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66 res = MP_MEM; |
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67 goto CLEANUP; |
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68 } |
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69 MP_CHECKOK(mp_copy(curvea, &group->curvea)); |
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70 MP_CHECKOK(mp_copy(curveb, &group->curveb)); |
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71 MP_CHECKOK(mp_copy(genx, &group->genx)); |
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72 MP_CHECKOK(mp_copy(geny, &group->geny)); |
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73 MP_CHECKOK(mp_copy(order, &group->order)); |
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74 group->cofactor = cofactor; |
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75 group->point_add = &ec_GFp_pt_add_aff; |
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76 group->point_sub = &ec_GFp_pt_sub_aff; |
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77 group->point_dbl = &ec_GFp_pt_dbl_aff; |
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78 group->point_mul = &ec_GFp_pt_mul_jm_wNAF; |
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79 group->base_point_mul = NULL; |
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80 group->points_mul = &ec_GFp_pts_mul_jac; |
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81 group->validate_point = &ec_GFp_validate_point; |
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82 |
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83 CLEANUP: |
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84 if (res != MP_OKAY) { |
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85 ECGroup_free(group); |
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86 return NULL; |
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87 } |
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88 return group; |
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89 } |
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90 |
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91 /* Construct a generic ECGroup for elliptic curves over prime fields with |
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92 * field arithmetic implemented in Montgomery coordinates. */ |
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93 ECGroup * |
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94 ECGroup_consGFp_mont(const mp_int *irr, const mp_int *curvea, |
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95 const mp_int *curveb, const mp_int *genx, |
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96 const mp_int *geny, const mp_int *order, int cofactor) |
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97 { |
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98 mp_err res = MP_OKAY; |
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99 ECGroup *group = NULL; |
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100 |
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101 group = ECGroup_new(); |
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102 if (group == NULL) |
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103 return NULL; |
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104 |
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105 group->meth = GFMethod_consGFp_mont(irr); |
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106 if (group->meth == NULL) { |
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107 res = MP_MEM; |
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108 goto CLEANUP; |
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109 } |
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110 MP_CHECKOK(group->meth-> |
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111 field_enc(curvea, &group->curvea, group->meth)); |
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112 MP_CHECKOK(group->meth-> |
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113 field_enc(curveb, &group->curveb, group->meth)); |
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114 MP_CHECKOK(group->meth->field_enc(genx, &group->genx, group->meth)); |
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115 MP_CHECKOK(group->meth->field_enc(geny, &group->geny, group->meth)); |
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116 MP_CHECKOK(mp_copy(order, &group->order)); |
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117 group->cofactor = cofactor; |
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118 group->point_add = &ec_GFp_pt_add_aff; |
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119 group->point_sub = &ec_GFp_pt_sub_aff; |
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120 group->point_dbl = &ec_GFp_pt_dbl_aff; |
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121 group->point_mul = &ec_GFp_pt_mul_jm_wNAF; |
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122 group->base_point_mul = NULL; |
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123 group->points_mul = &ec_GFp_pts_mul_jac; |
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124 group->validate_point = &ec_GFp_validate_point; |
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125 |
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126 CLEANUP: |
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127 if (res != MP_OKAY) { |
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128 ECGroup_free(group); |
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129 return NULL; |
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130 } |
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131 return group; |
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132 } |
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133 |
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134 #ifdef NSS_ECC_MORE_THAN_SUITE_B |
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135 /* Construct a generic ECGroup for elliptic curves over binary polynomial |
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136 * fields. */ |
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137 ECGroup * |
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138 ECGroup_consGF2m(const mp_int *irr, const unsigned int irr_arr[5], |
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139 const mp_int *curvea, const mp_int *curveb, |
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140 const mp_int *genx, const mp_int *geny, |
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141 const mp_int *order, int cofactor) |
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142 { |
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143 mp_err res = MP_OKAY; |
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144 ECGroup *group = NULL; |
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145 |
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146 group = ECGroup_new(); |
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147 if (group == NULL) |
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148 return NULL; |
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149 |
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150 group->meth = GFMethod_consGF2m(irr, irr_arr); |
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151 if (group->meth == NULL) { |
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152 res = MP_MEM; |
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153 goto CLEANUP; |
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154 } |
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155 MP_CHECKOK(mp_copy(curvea, &group->curvea)); |
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156 MP_CHECKOK(mp_copy(curveb, &group->curveb)); |
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157 MP_CHECKOK(mp_copy(genx, &group->genx)); |
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158 MP_CHECKOK(mp_copy(geny, &group->geny)); |
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159 MP_CHECKOK(mp_copy(order, &group->order)); |
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160 group->cofactor = cofactor; |
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161 group->point_add = &ec_GF2m_pt_add_aff; |
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162 group->point_sub = &ec_GF2m_pt_sub_aff; |
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163 group->point_dbl = &ec_GF2m_pt_dbl_aff; |
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164 group->point_mul = &ec_GF2m_pt_mul_mont; |
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165 group->base_point_mul = NULL; |
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166 group->points_mul = &ec_pts_mul_basic; |
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167 group->validate_point = &ec_GF2m_validate_point; |
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168 |
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169 CLEANUP: |
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170 if (res != MP_OKAY) { |
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171 ECGroup_free(group); |
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172 return NULL; |
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173 } |
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174 return group; |
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175 } |
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176 #endif |
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177 |
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178 /* Construct ECGroup from hex parameters and name, if any. Called by |
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179 * ECGroup_fromHex and ECGroup_fromName. */ |
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180 ECGroup * |
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181 ecgroup_fromNameAndHex(const ECCurveName name, |
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182 const ECCurveParams * params) |
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183 { |
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184 mp_int irr, curvea, curveb, genx, geny, order; |
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185 int bits; |
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186 ECGroup *group = NULL; |
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187 mp_err res = MP_OKAY; |
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188 |
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189 /* initialize values */ |
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190 MP_DIGITS(&irr) = 0; |
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191 MP_DIGITS(&curvea) = 0; |
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192 MP_DIGITS(&curveb) = 0; |
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193 MP_DIGITS(&genx) = 0; |
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194 MP_DIGITS(&geny) = 0; |
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195 MP_DIGITS(&order) = 0; |
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196 MP_CHECKOK(mp_init(&irr)); |
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197 MP_CHECKOK(mp_init(&curvea)); |
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198 MP_CHECKOK(mp_init(&curveb)); |
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199 MP_CHECKOK(mp_init(&genx)); |
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200 MP_CHECKOK(mp_init(&geny)); |
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201 MP_CHECKOK(mp_init(&order)); |
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202 MP_CHECKOK(mp_read_radix(&irr, params->irr, 16)); |
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203 MP_CHECKOK(mp_read_radix(&curvea, params->curvea, 16)); |
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204 MP_CHECKOK(mp_read_radix(&curveb, params->curveb, 16)); |
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205 MP_CHECKOK(mp_read_radix(&genx, params->genx, 16)); |
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206 MP_CHECKOK(mp_read_radix(&geny, params->geny, 16)); |
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207 MP_CHECKOK(mp_read_radix(&order, params->order, 16)); |
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208 |
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209 /* determine number of bits */ |
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210 bits = mpl_significant_bits(&irr) - 1; |
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211 if (bits < MP_OKAY) { |
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212 res = bits; |
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213 goto CLEANUP; |
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214 } |
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215 |
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216 /* determine which optimizations (if any) to use */ |
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217 if (params->field == ECField_GFp) { |
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218 switch (name) { |
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219 #ifdef NSS_ECC_MORE_THAN_SUITE_B |
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220 #ifdef ECL_USE_FP |
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221 case ECCurve_SECG_PRIME_160R1: |
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222 group = |
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223 ECGroup_consGFp(&irr, &curvea, &curveb, &genx, &geny, |
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224 &order, params->cofactor); |
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225 if (group == NULL) { res = MP_UNDEF; goto CLEANUP; } |
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226 MP_CHECKOK(ec_group_set_secp160r1_fp(group)); |
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227 break; |
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228 #endif |
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229 case ECCurve_SECG_PRIME_192R1: |
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|
230 #ifdef ECL_USE_FP |
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231 group = |
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232 ECGroup_consGFp(&irr, &curvea, &curveb, &genx, &geny, |
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|
233 &order, params->cofactor); |
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234 if (group == NULL) { res = MP_UNDEF; goto CLEANUP; } |
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|
235 MP_CHECKOK(ec_group_set_nistp192_fp(group)); |
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|
236 #else |
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|
237 group = |
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238 ECGroup_consGFp(&irr, &curvea, &curveb, &genx, &geny, |
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|
239 &order, params->cofactor); |
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240 if (group == NULL) { res = MP_UNDEF; goto CLEANUP; } |
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|
241 MP_CHECKOK(ec_group_set_gfp192(group, name)); |
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|
242 #endif |
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|
243 break; |
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|
244 case ECCurve_SECG_PRIME_224R1: |
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|
245 #ifdef ECL_USE_FP |
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246 group = |
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|
247 ECGroup_consGFp(&irr, &curvea, &curveb, &genx, &geny, |
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248 &order, params->cofactor); |
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249 if (group == NULL) { res = MP_UNDEF; goto CLEANUP; } |
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250 MP_CHECKOK(ec_group_set_nistp224_fp(group)); |
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251 #else |
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252 group = |
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253 ECGroup_consGFp(&irr, &curvea, &curveb, &genx, &geny, |
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254 &order, params->cofactor); |
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255 if (group == NULL) { res = MP_UNDEF; goto CLEANUP; } |
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|
256 MP_CHECKOK(ec_group_set_gfp224(group, name)); |
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257 #endif |
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258 break; |
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|
259 #endif /* NSS_ECC_MORE_THAN_SUITE_B */ |
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|
260 case ECCurve_SECG_PRIME_256R1: |
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|
261 group = |
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|
262 ECGroup_consGFp(&irr, &curvea, &curveb, &genx, &geny, |
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|
263 &order, params->cofactor); |
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|
264 if (group == NULL) { res = MP_UNDEF; goto CLEANUP; } |
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|
265 MP_CHECKOK(ec_group_set_gfp256(group, name)); |
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|
266 MP_CHECKOK(ec_group_set_gfp256_32(group, name)); |
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|
267 break; |
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|
268 case ECCurve_SECG_PRIME_521R1: |
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|
269 group = |
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|
270 ECGroup_consGFp(&irr, &curvea, &curveb, &genx, &geny, |
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|
271 &order, params->cofactor); |
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272 if (group == NULL) { res = MP_UNDEF; goto CLEANUP; } |
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|
273 MP_CHECKOK(ec_group_set_gfp521(group, name)); |
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|
274 break; |
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275 default: |
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276 /* use generic arithmetic */ |
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277 group = |
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278 ECGroup_consGFp_mont(&irr, &curvea, &curveb, &genx, &geny, |
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279 &order, params->cofactor); |
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280 if (group == NULL) { res = MP_UNDEF; goto CLEANUP; } |
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281 } |
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282 #ifdef NSS_ECC_MORE_THAN_SUITE_B |
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283 } else if (params->field == ECField_GF2m) { |
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284 group = ECGroup_consGF2m(&irr, NULL, &curvea, &curveb, &genx, &geny, &order, params->cofactor); |
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285 if (group == NULL) { res = MP_UNDEF; goto CLEANUP; } |
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|
286 if ((name == ECCurve_NIST_K163) || |
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|
287 (name == ECCurve_NIST_B163) || |
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|
288 (name == ECCurve_SECG_CHAR2_163R1)) { |
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|
289 MP_CHECKOK(ec_group_set_gf2m163(group, name)); |
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290 } else if ((name == ECCurve_SECG_CHAR2_193R1) || |
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|
291 (name == ECCurve_SECG_CHAR2_193R2)) { |
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changeset
|
292 MP_CHECKOK(ec_group_set_gf2m193(group, name)); |
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293 } else if ((name == ECCurve_NIST_K233) || |
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|
294 (name == ECCurve_NIST_B233)) { |
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|
295 MP_CHECKOK(ec_group_set_gf2m233(group, name)); |
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|
296 } |
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|
297 #endif |
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298 } else { |
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299 res = MP_UNDEF; |
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300 goto CLEANUP; |
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|
301 } |
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302 |
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|
303 /* set name, if any */ |
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|
304 if ((group != NULL) && (params->text != NULL)) { |
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|
305 group->text = strdup(params->text); |
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changeset
|
306 if (group->text == NULL) { |
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changeset
|
307 res = MP_MEM; |
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|
308 } |
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|
309 } |
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|
310 |
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|
311 CLEANUP: |
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|
312 mp_clear(&irr); |
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changeset
|
313 mp_clear(&curvea); |
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changeset
|
314 mp_clear(&curveb); |
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changeset
|
315 mp_clear(&genx); |
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changeset
|
316 mp_clear(&geny); |
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changeset
|
317 mp_clear(&order); |
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changeset
|
318 if (res != MP_OKAY) { |
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|
319 ECGroup_free(group); |
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|
320 return NULL; |
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|
321 } |
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|
322 return group; |
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|
323 } |
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diff
changeset
|
324 |
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|
325 /* Construct ECGroup from hexadecimal representations of parameters. */ |
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|
326 ECGroup * |
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changeset
|
327 ECGroup_fromHex(const ECCurveParams * params) |
1e5118fa0cb1
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|
328 { |
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|
329 return ecgroup_fromNameAndHex(ECCurve_noName, params); |
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changeset
|
330 } |
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parents:
diff
changeset
|
331 |
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|
332 /* Construct ECGroup from named parameters. */ |
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changeset
|
333 ECGroup * |
1e5118fa0cb1
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changeset
|
334 ECGroup_fromName(const ECCurveName name) |
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diff
changeset
|
335 { |
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|
336 ECGroup *group = NULL; |
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|
337 ECCurveParams *params = NULL; |
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|
338 mp_err res = MP_OKAY; |
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changeset
|
339 |
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changeset
|
340 params = EC_GetNamedCurveParams(name); |
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parents:
diff
changeset
|
341 if (params == NULL) { |
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changeset
|
342 res = MP_UNDEF; |
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parents:
diff
changeset
|
343 goto CLEANUP; |
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344 } |
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345 |
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346 /* construct actual group */ |
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347 group = ecgroup_fromNameAndHex(name, params); |
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348 if (group == NULL) { |
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349 res = MP_UNDEF; |
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350 goto CLEANUP; |
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351 } |
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352 |
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353 CLEANUP: |
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354 EC_FreeCurveParams(params); |
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355 if (res != MP_OKAY) { |
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356 ECGroup_free(group); |
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357 return NULL; |
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358 } |
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359 return group; |
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360 } |
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361 |
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362 /* Validates an EC public key as described in Section 5.2.2 of X9.62. */ |
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363 mp_err ECPoint_validate(const ECGroup *group, const mp_int *px, const |
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364 mp_int *py) |
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365 { |
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366 /* 1: Verify that publicValue is not the point at infinity */ |
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367 /* 2: Verify that the coordinates of publicValue are elements |
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368 * of the field. |
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369 */ |
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370 /* 3: Verify that publicValue is on the curve. */ |
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371 /* 4: Verify that the order of the curve times the publicValue |
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372 * is the point at infinity. |
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373 */ |
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374 return group->validate_point(px, py, group); |
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375 } |
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376 |
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377 /* Free the memory allocated (if any) to an ECGroup object. */ |
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378 void |
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379 ECGroup_free(ECGroup *group) |
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380 { |
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381 if (group == NULL) |
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382 return; |
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383 GFMethod_free(group->meth); |
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384 if (group->constructed == MP_NO) |
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385 return; |
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386 mp_clear(&group->curvea); |
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387 mp_clear(&group->curveb); |
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388 mp_clear(&group->genx); |
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389 mp_clear(&group->geny); |
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390 mp_clear(&group->order); |
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391 if (group->text != NULL) |
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392 free(group->text); |
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393 if (group->extra_free != NULL) |
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394 group->extra_free(group); |
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395 free(group); |
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396 } |