1 | /*
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2 | * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
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3 | *
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4 | * Licensed under the OpenSSL license (the "License"). You may not use
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5 | * this file except in compliance with the License. You can obtain a copy
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6 | * in the file LICENSE in the source distribution or at
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7 | * https://www.openssl.org/source/license.html
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8 | */
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9 |
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10 | /* ====================================================================
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11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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12 | * Portions originally developed by SUN MICROSYSTEMS, INC., and
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13 | * contributed to the OpenSSL project.
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14 | */
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15 |
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16 | #include <internal/cryptlib.h>
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17 | #include <string.h>
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18 | #include "ec_lcl.h"
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19 | #include <openssl/err.h>
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20 | #include <openssl/engine.h>
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21 |
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22 | EC_KEY *EC_KEY_new(void)
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23 | {
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24 | return EC_KEY_new_method(NULL);
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25 | }
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26 |
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27 | EC_KEY *EC_KEY_new_by_curve_name(int nid)
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28 | {
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29 | EC_KEY *ret = EC_KEY_new();
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30 | if (ret == NULL)
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31 | return NULL;
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32 | ret->group = EC_GROUP_new_by_curve_name(nid);
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33 | if (ret->group == NULL) {
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34 | EC_KEY_free(ret);
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35 | return NULL;
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36 | }
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37 | if (ret->meth->set_group != NULL
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38 | && ret->meth->set_group(ret, ret->group) == 0) {
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39 | EC_KEY_free(ret);
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40 | return NULL;
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41 | }
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42 | return ret;
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43 | }
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44 |
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45 | void EC_KEY_free(EC_KEY *r)
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46 | {
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47 | int i;
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48 |
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49 | if (r == NULL)
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50 | return;
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51 |
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52 | CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
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53 | REF_PRINT_COUNT("EC_KEY", r);
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54 | if (i > 0)
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55 | return;
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56 | REF_ASSERT_ISNT(i < 0);
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57 |
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58 | if (r->meth->finish != NULL)
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59 | r->meth->finish(r);
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60 |
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61 | #ifndef OPENSSL_NO_ENGINE
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62 | ENGINE_finish(r->engine);
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63 | #endif
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64 |
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65 | if (r->group && r->group->meth->keyfinish)
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66 | r->group->meth->keyfinish(r);
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67 |
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68 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EC_KEY, r, &r->ex_data);
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69 | CRYPTO_THREAD_lock_free(r->lock);
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70 | EC_GROUP_free(r->group);
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71 | EC_POINT_free(r->pub_key);
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72 | BN_clear_free(r->priv_key);
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73 |
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74 | OPENSSL_clear_free((void *)r, sizeof(EC_KEY));
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75 | }
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76 |
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77 | EC_KEY *EC_KEY_copy(EC_KEY *dest, const EC_KEY *src)
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78 | {
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79 | if (dest == NULL || src == NULL) {
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80 | ECerr(EC_F_EC_KEY_COPY, ERR_R_PASSED_NULL_PARAMETER);
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81 | return NULL;
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82 | }
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83 | if (src->meth != dest->meth) {
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84 | if (dest->meth->finish != NULL)
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85 | dest->meth->finish(dest);
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86 | if (dest->group && dest->group->meth->keyfinish)
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87 | dest->group->meth->keyfinish(dest);
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88 | #ifndef OPENSSL_NO_ENGINE
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89 | if (ENGINE_finish(dest->engine) == 0)
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90 | return 0;
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91 | dest->engine = NULL;
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92 | #endif
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93 | }
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94 | /* copy the parameters */
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95 | if (src->group != NULL) {
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96 | const EC_METHOD *meth = EC_GROUP_method_of(src->group);
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97 | /* clear the old group */
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98 | EC_GROUP_free(dest->group);
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99 | dest->group = EC_GROUP_new(meth);
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100 | if (dest->group == NULL)
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101 | return NULL;
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102 | if (!EC_GROUP_copy(dest->group, src->group))
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103 | return NULL;
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104 |
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105 | /* copy the public key */
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106 | if (src->pub_key != NULL) {
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107 | EC_POINT_free(dest->pub_key);
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108 | dest->pub_key = EC_POINT_new(src->group);
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109 | if (dest->pub_key == NULL)
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110 | return NULL;
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111 | if (!EC_POINT_copy(dest->pub_key, src->pub_key))
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112 | return NULL;
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113 | }
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114 | /* copy the private key */
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115 | if (src->priv_key != NULL) {
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116 | if (dest->priv_key == NULL) {
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117 | dest->priv_key = BN_new();
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118 | if (dest->priv_key == NULL)
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119 | return NULL;
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120 | }
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121 | if (!BN_copy(dest->priv_key, src->priv_key))
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122 | return NULL;
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123 | if (src->group->meth->keycopy
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124 | && src->group->meth->keycopy(dest, src) == 0)
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125 | return NULL;
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126 | }
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127 | }
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128 |
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129 |
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130 | /* copy the rest */
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131 | dest->enc_flag = src->enc_flag;
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132 | dest->conv_form = src->conv_form;
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133 | dest->version = src->version;
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134 | dest->flags = src->flags;
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135 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_EC_KEY,
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136 | &dest->ex_data, &src->ex_data))
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137 | return NULL;
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138 |
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139 | if (src->meth != dest->meth) {
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140 | #ifndef OPENSSL_NO_ENGINE
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141 | if (src->engine != NULL && ENGINE_init(src->engine) == 0)
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142 | return NULL;
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143 | dest->engine = src->engine;
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144 | #endif
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145 | dest->meth = src->meth;
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146 | }
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147 |
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148 | if (src->meth->copy != NULL && src->meth->copy(dest, src) == 0)
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149 | return NULL;
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150 |
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151 | return dest;
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152 | }
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153 |
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154 | EC_KEY *EC_KEY_dup(const EC_KEY *ec_key)
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155 | {
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156 | EC_KEY *ret = EC_KEY_new_method(ec_key->engine);
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157 |
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158 | if (ret == NULL)
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159 | return NULL;
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160 |
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161 | if (EC_KEY_copy(ret, ec_key) == NULL) {
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162 | EC_KEY_free(ret);
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163 | return NULL;
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164 | }
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165 | return ret;
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166 | }
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167 |
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168 | int EC_KEY_up_ref(EC_KEY *r)
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169 | {
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170 | int i;
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171 |
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172 | if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
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173 | return 0;
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174 |
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175 | REF_PRINT_COUNT("EC_KEY", r);
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176 | REF_ASSERT_ISNT(i < 2);
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177 | return ((i > 1) ? 1 : 0);
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178 | }
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179 |
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180 | int EC_KEY_generate_key(EC_KEY *eckey)
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181 | {
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182 | if (eckey == NULL || eckey->group == NULL) {
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183 | ECerr(EC_F_EC_KEY_GENERATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
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184 | return 0;
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185 | }
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186 | if (eckey->meth->keygen != NULL)
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187 | return eckey->meth->keygen(eckey);
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188 | ECerr(EC_F_EC_KEY_GENERATE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
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189 | return 0;
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190 | }
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191 |
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192 | int ossl_ec_key_gen(EC_KEY *eckey)
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193 | {
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194 | OPENSSL_assert(eckey->group->meth->keygen != NULL);
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195 | return eckey->group->meth->keygen(eckey);
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196 | }
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197 |
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198 | int ec_key_simple_generate_key(EC_KEY *eckey)
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199 | {
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200 | int ok = 0;
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201 | BN_CTX *ctx = NULL;
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202 | BIGNUM *priv_key = NULL;
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203 | const BIGNUM *order = NULL;
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204 | EC_POINT *pub_key = NULL;
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205 |
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206 | if ((ctx = BN_CTX_new()) == NULL)
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207 | goto err;
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208 |
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209 | if (eckey->priv_key == NULL) {
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210 | priv_key = BN_new();
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211 | if (priv_key == NULL)
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212 | goto err;
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213 | } else
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214 | priv_key = eckey->priv_key;
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215 |
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216 | order = EC_GROUP_get0_order(eckey->group);
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217 | if (order == NULL)
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218 | goto err;
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219 |
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220 | do
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221 | if (!BN_rand_range(priv_key, order))
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222 | goto err;
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223 | while (BN_is_zero(priv_key)) ;
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224 |
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225 | if (eckey->pub_key == NULL) {
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226 | pub_key = EC_POINT_new(eckey->group);
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227 | if (pub_key == NULL)
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228 | goto err;
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229 | } else
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230 | pub_key = eckey->pub_key;
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231 |
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232 | if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx))
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233 | goto err;
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234 |
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235 | eckey->priv_key = priv_key;
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236 | eckey->pub_key = pub_key;
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237 |
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238 | ok = 1;
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239 |
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240 | err:
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241 | if (eckey->pub_key == NULL)
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242 | EC_POINT_free(pub_key);
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243 | if (eckey->priv_key != priv_key)
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244 | BN_free(priv_key);
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245 | BN_CTX_free(ctx);
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246 | return ok;
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247 | }
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248 |
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249 | int ec_key_simple_generate_public_key(EC_KEY *eckey)
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250 | {
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251 | return EC_POINT_mul(eckey->group, eckey->pub_key, eckey->priv_key, NULL,
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252 | NULL, NULL);
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253 | }
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254 |
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255 | int EC_KEY_check_key(const EC_KEY *eckey)
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256 | {
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257 | if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) {
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258 | ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
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259 | return 0;
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260 | }
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261 |
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262 | if (eckey->group->meth->keycheck == NULL) {
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263 | ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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264 | return 0;
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265 | }
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266 |
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267 | return eckey->group->meth->keycheck(eckey);
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268 | }
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269 |
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270 | int ec_key_simple_check_key(const EC_KEY *eckey)
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271 | {
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272 | int ok = 0;
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273 | BN_CTX *ctx = NULL;
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274 | const BIGNUM *order = NULL;
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275 | EC_POINT *point = NULL;
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276 |
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277 | if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) {
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278 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
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279 | return 0;
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280 | }
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281 |
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282 | if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key)) {
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283 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_AT_INFINITY);
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284 | goto err;
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285 | }
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286 |
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287 | if ((ctx = BN_CTX_new()) == NULL)
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288 | goto err;
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289 | if ((point = EC_POINT_new(eckey->group)) == NULL)
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290 | goto err;
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291 |
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292 | /* testing whether the pub_key is on the elliptic curve */
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293 | if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) {
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294 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE);
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295 | goto err;
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296 | }
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297 | /* testing whether pub_key * order is the point at infinity */
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298 | order = eckey->group->order;
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299 | if (BN_is_zero(order)) {
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300 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_GROUP_ORDER);
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301 | goto err;
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302 | }
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303 | if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx)) {
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304 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB);
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305 | goto err;
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306 | }
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307 | if (!EC_POINT_is_at_infinity(eckey->group, point)) {
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308 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER);
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309 | goto err;
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310 | }
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311 | /*
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312 | * in case the priv_key is present : check if generator * priv_key ==
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313 | * pub_key
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314 | */
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315 | if (eckey->priv_key != NULL) {
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316 | if (BN_cmp(eckey->priv_key, order) >= 0) {
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317 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER);
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318 | goto err;
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319 | }
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320 | if (!EC_POINT_mul(eckey->group, point, eckey->priv_key,
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321 | NULL, NULL, ctx)) {
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322 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB);
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323 | goto err;
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324 | }
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325 | if (EC_POINT_cmp(eckey->group, point, eckey->pub_key, ctx) != 0) {
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326 | ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_PRIVATE_KEY);
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327 | goto err;
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328 | }
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329 | }
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330 | ok = 1;
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331 | err:
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332 | BN_CTX_free(ctx);
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333 | EC_POINT_free(point);
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334 | return ok;
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335 | }
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336 |
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337 | int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x,
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338 | BIGNUM *y)
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339 | {
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340 | BN_CTX *ctx = NULL;
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341 | BIGNUM *tx, *ty;
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342 | EC_POINT *point = NULL;
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343 | int ok = 0;
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344 | #ifndef OPENSSL_NO_EC2M
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345 | int tmp_nid, is_char_two = 0;
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346 | #endif
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347 |
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348 | if (key == NULL || key->group == NULL || x == NULL || y == NULL) {
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349 | ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES,
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350 | ERR_R_PASSED_NULL_PARAMETER);
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351 | return 0;
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352 | }
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353 | ctx = BN_CTX_new();
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354 | if (ctx == NULL)
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355 | return 0;
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356 |
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357 | BN_CTX_start(ctx);
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358 | point = EC_POINT_new(key->group);
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359 |
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360 | if (point == NULL)
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361 | goto err;
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362 |
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363 | tx = BN_CTX_get(ctx);
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364 | ty = BN_CTX_get(ctx);
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365 | if (ty == NULL)
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366 | goto err;
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367 |
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368 | #ifndef OPENSSL_NO_EC2M
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369 | tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group));
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370 |
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371 | if (tmp_nid == NID_X9_62_characteristic_two_field)
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372 | is_char_two = 1;
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373 |
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374 | if (is_char_two) {
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375 | if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point,
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376 | x, y, ctx))
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377 | goto err;
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378 | if (!EC_POINT_get_affine_coordinates_GF2m(key->group, point,
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379 | tx, ty, ctx))
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380 | goto err;
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381 | } else
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382 | #endif
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383 | {
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384 | if (!EC_POINT_set_affine_coordinates_GFp(key->group, point,
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385 | x, y, ctx))
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386 | goto err;
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387 | if (!EC_POINT_get_affine_coordinates_GFp(key->group, point,
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388 | tx, ty, ctx))
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389 | goto err;
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390 | }
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391 | /*
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392 | * Check if retrieved coordinates match originals and are less than field
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393 | * order: if not values are out of range.
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394 | */
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395 | if (BN_cmp(x, tx) || BN_cmp(y, ty)
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396 | || (BN_cmp(x, key->group->field) >= 0)
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397 | || (BN_cmp(y, key->group->field) >= 0)) {
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398 | ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES,
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399 | EC_R_COORDINATES_OUT_OF_RANGE);
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400 | goto err;
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401 | }
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402 |
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403 | if (!EC_KEY_set_public_key(key, point))
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404 | goto err;
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405 |
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406 | if (EC_KEY_check_key(key) == 0)
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407 | goto err;
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408 |
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409 | ok = 1;
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410 |
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411 | err:
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412 | BN_CTX_end(ctx);
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413 | BN_CTX_free(ctx);
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414 | EC_POINT_free(point);
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415 | return ok;
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416 |
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417 | }
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418 |
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419 | const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key)
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420 | {
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421 | return key->group;
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422 | }
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423 |
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424 | int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group)
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425 | {
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426 | if (key->meth->set_group != NULL && key->meth->set_group(key, group) == 0)
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427 | return 0;
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428 | EC_GROUP_free(key->group);
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429 | key->group = EC_GROUP_dup(group);
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430 | return (key->group == NULL) ? 0 : 1;
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431 | }
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432 |
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433 | const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key)
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434 | {
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435 | return key->priv_key;
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436 | }
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437 |
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438 | int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key)
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439 | {
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440 | if (key->group == NULL || key->group->meth == NULL)
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441 | return 0;
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442 | if (key->group->meth->set_private != NULL
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443 | && key->group->meth->set_private(key, priv_key) == 0)
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444 | return 0;
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445 | if (key->meth->set_private != NULL
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446 | && key->meth->set_private(key, priv_key) == 0)
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447 | return 0;
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448 | BN_clear_free(key->priv_key);
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449 | key->priv_key = BN_dup(priv_key);
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450 | return (key->priv_key == NULL) ? 0 : 1;
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451 | }
|
---|
452 |
|
---|
453 | const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key)
|
---|
454 | {
|
---|
455 | return key->pub_key;
|
---|
456 | }
|
---|
457 |
|
---|
458 | int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub_key)
|
---|
459 | {
|
---|
460 | if (key->meth->set_public != NULL
|
---|
461 | && key->meth->set_public(key, pub_key) == 0)
|
---|
462 | return 0;
|
---|
463 | EC_POINT_free(key->pub_key);
|
---|
464 | key->pub_key = EC_POINT_dup(pub_key, key->group);
|
---|
465 | return (key->pub_key == NULL) ? 0 : 1;
|
---|
466 | }
|
---|
467 |
|
---|
468 | unsigned int EC_KEY_get_enc_flags(const EC_KEY *key)
|
---|
469 | {
|
---|
470 | return key->enc_flag;
|
---|
471 | }
|
---|
472 |
|
---|
473 | void EC_KEY_set_enc_flags(EC_KEY *key, unsigned int flags)
|
---|
474 | {
|
---|
475 | key->enc_flag = flags;
|
---|
476 | }
|
---|
477 |
|
---|
478 | point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key)
|
---|
479 | {
|
---|
480 | return key->conv_form;
|
---|
481 | }
|
---|
482 |
|
---|
483 | void EC_KEY_set_conv_form(EC_KEY *key, point_conversion_form_t cform)
|
---|
484 | {
|
---|
485 | key->conv_form = cform;
|
---|
486 | if (key->group != NULL)
|
---|
487 | EC_GROUP_set_point_conversion_form(key->group, cform);
|
---|
488 | }
|
---|
489 |
|
---|
490 | void EC_KEY_set_asn1_flag(EC_KEY *key, int flag)
|
---|
491 | {
|
---|
492 | if (key->group != NULL)
|
---|
493 | EC_GROUP_set_asn1_flag(key->group, flag);
|
---|
494 | }
|
---|
495 |
|
---|
496 | int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx)
|
---|
497 | {
|
---|
498 | if (key->group == NULL)
|
---|
499 | return 0;
|
---|
500 | return EC_GROUP_precompute_mult(key->group, ctx);
|
---|
501 | }
|
---|
502 |
|
---|
503 | int EC_KEY_get_flags(const EC_KEY *key)
|
---|
504 | {
|
---|
505 | return key->flags;
|
---|
506 | }
|
---|
507 |
|
---|
508 | void EC_KEY_set_flags(EC_KEY *key, int flags)
|
---|
509 | {
|
---|
510 | key->flags |= flags;
|
---|
511 | }
|
---|
512 |
|
---|
513 | void EC_KEY_clear_flags(EC_KEY *key, int flags)
|
---|
514 | {
|
---|
515 | key->flags &= ~flags;
|
---|
516 | }
|
---|
517 |
|
---|
518 | size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form,
|
---|
519 | unsigned char **pbuf, BN_CTX *ctx)
|
---|
520 | {
|
---|
521 | if (key == NULL || key->pub_key == NULL || key->group == NULL)
|
---|
522 | return 0;
|
---|
523 | return EC_POINT_point2buf(key->group, key->pub_key, form, pbuf, ctx);
|
---|
524 | }
|
---|
525 |
|
---|
526 | int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len,
|
---|
527 | BN_CTX *ctx)
|
---|
528 | {
|
---|
529 | if (key == NULL || key->group == NULL)
|
---|
530 | return 0;
|
---|
531 | if (key->pub_key == NULL)
|
---|
532 | key->pub_key = EC_POINT_new(key->group);
|
---|
533 | if (key->pub_key == NULL)
|
---|
534 | return 0;
|
---|
535 | if (EC_POINT_oct2point(key->group, key->pub_key, buf, len, ctx) == 0)
|
---|
536 | return 0;
|
---|
537 | /*
|
---|
538 | * Save the point conversion form.
|
---|
539 | * For non-custom curves the first octet of the buffer (excluding
|
---|
540 | * the last significant bit) contains the point conversion form.
|
---|
541 | * EC_POINT_oct2point() has already performed sanity checking of
|
---|
542 | * the buffer so we know it is valid.
|
---|
543 | */
|
---|
544 | if ((key->group->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0)
|
---|
545 | key->conv_form = (point_conversion_form_t)(buf[0] & ~0x01);
|
---|
546 | return 1;
|
---|
547 | }
|
---|
548 |
|
---|
549 | size_t EC_KEY_priv2oct(const EC_KEY *eckey,
|
---|
550 | unsigned char *buf, size_t len)
|
---|
551 | {
|
---|
552 | if (eckey->group == NULL || eckey->group->meth == NULL)
|
---|
553 | return 0;
|
---|
554 | if (eckey->group->meth->priv2oct == NULL) {
|
---|
555 | ECerr(EC_F_EC_KEY_PRIV2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
|
---|
556 | return 0;
|
---|
557 | }
|
---|
558 |
|
---|
559 | return eckey->group->meth->priv2oct(eckey, buf, len);
|
---|
560 | }
|
---|
561 |
|
---|
562 | size_t ec_key_simple_priv2oct(const EC_KEY *eckey,
|
---|
563 | unsigned char *buf, size_t len)
|
---|
564 | {
|
---|
565 | size_t buf_len;
|
---|
566 |
|
---|
567 | buf_len = (EC_GROUP_order_bits(eckey->group) + 7) / 8;
|
---|
568 | if (eckey->priv_key == NULL)
|
---|
569 | return 0;
|
---|
570 | if (buf == NULL)
|
---|
571 | return buf_len;
|
---|
572 | else if (len < buf_len)
|
---|
573 | return 0;
|
---|
574 |
|
---|
575 | /* Octetstring may need leading zeros if BN is to short */
|
---|
576 |
|
---|
577 | if (BN_bn2binpad(eckey->priv_key, buf, buf_len) == -1) {
|
---|
578 | ECerr(EC_F_EC_KEY_SIMPLE_PRIV2OCT, EC_R_BUFFER_TOO_SMALL);
|
---|
579 | return 0;
|
---|
580 | }
|
---|
581 |
|
---|
582 | return buf_len;
|
---|
583 | }
|
---|
584 |
|
---|
585 | int EC_KEY_oct2priv(EC_KEY *eckey, const unsigned char *buf, size_t len)
|
---|
586 | {
|
---|
587 | if (eckey->group == NULL || eckey->group->meth == NULL)
|
---|
588 | return 0;
|
---|
589 | if (eckey->group->meth->oct2priv == NULL) {
|
---|
590 | ECerr(EC_F_EC_KEY_OCT2PRIV, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
|
---|
591 | return 0;
|
---|
592 | }
|
---|
593 | return eckey->group->meth->oct2priv(eckey, buf, len);
|
---|
594 | }
|
---|
595 |
|
---|
596 | int ec_key_simple_oct2priv(EC_KEY *eckey, const unsigned char *buf, size_t len)
|
---|
597 | {
|
---|
598 | if (eckey->priv_key == NULL)
|
---|
599 | eckey->priv_key = BN_secure_new();
|
---|
600 | if (eckey->priv_key == NULL) {
|
---|
601 | ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_MALLOC_FAILURE);
|
---|
602 | return 0;
|
---|
603 | }
|
---|
604 | eckey->priv_key = BN_bin2bn(buf, len, eckey->priv_key);
|
---|
605 | if (eckey->priv_key == NULL) {
|
---|
606 | ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_BN_LIB);
|
---|
607 | return 0;
|
---|
608 | }
|
---|
609 | return 1;
|
---|
610 | }
|
---|
611 |
|
---|
612 | size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf)
|
---|
613 | {
|
---|
614 | size_t len;
|
---|
615 | unsigned char *buf;
|
---|
616 | len = EC_KEY_priv2oct(eckey, NULL, 0);
|
---|
617 | if (len == 0)
|
---|
618 | return 0;
|
---|
619 | buf = OPENSSL_malloc(len);
|
---|
620 | if (buf == NULL)
|
---|
621 | return 0;
|
---|
622 | len = EC_KEY_priv2oct(eckey, buf, len);
|
---|
623 | if (len == 0) {
|
---|
624 | OPENSSL_free(buf);
|
---|
625 | return 0;
|
---|
626 | }
|
---|
627 | *pbuf = buf;
|
---|
628 | return len;
|
---|
629 | }
|
---|
630 |
|
---|
631 | int EC_KEY_can_sign(const EC_KEY *eckey)
|
---|
632 | {
|
---|
633 | if (eckey->group == NULL || eckey->group->meth == NULL
|
---|
634 | || (eckey->group->meth->flags & EC_FLAGS_NO_SIGN))
|
---|
635 | return 0;
|
---|
636 | return 1;
|
---|
637 | }
|
---|