1 | /*
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2 | * Copyright 1995-2016 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 | #include <stdio.h>
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11 | #include "internal/cryptlib.h"
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12 | #include <openssl/bn.h>
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13 | #include <openssl/err.h>
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14 | #include <openssl/objects.h>
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15 | #include <openssl/evp.h>
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16 | #include <openssl/x509.h>
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17 | #include <openssl/rsa.h>
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18 | #include <openssl/dsa.h>
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19 | #include <openssl/dh.h>
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20 | #include <openssl/engine.h>
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21 |
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22 | #include "internal/asn1_int.h"
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23 | #include "internal/evp_int.h"
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24 |
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25 | static void EVP_PKEY_free_it(EVP_PKEY *x);
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26 |
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27 | int EVP_PKEY_bits(const EVP_PKEY *pkey)
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28 | {
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29 | if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
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30 | return pkey->ameth->pkey_bits(pkey);
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31 | return 0;
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32 | }
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33 |
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34 | int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
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35 | {
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36 | if (pkey == NULL)
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37 | return 0;
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38 | if (!pkey->ameth || !pkey->ameth->pkey_security_bits)
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39 | return -2;
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40 | return pkey->ameth->pkey_security_bits(pkey);
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41 | }
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42 |
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43 | int EVP_PKEY_size(EVP_PKEY *pkey)
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44 | {
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45 | if (pkey && pkey->ameth && pkey->ameth->pkey_size)
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46 | return pkey->ameth->pkey_size(pkey);
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47 | return 0;
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48 | }
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49 |
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50 | int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
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51 | {
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52 | #ifndef OPENSSL_NO_DSA
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53 | if (pkey->type == EVP_PKEY_DSA) {
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54 | int ret = pkey->save_parameters;
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55 |
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56 | if (mode >= 0)
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57 | pkey->save_parameters = mode;
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58 | return (ret);
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59 | }
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60 | #endif
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61 | #ifndef OPENSSL_NO_EC
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62 | if (pkey->type == EVP_PKEY_EC) {
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63 | int ret = pkey->save_parameters;
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64 |
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65 | if (mode >= 0)
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66 | pkey->save_parameters = mode;
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67 | return (ret);
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68 | }
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69 | #endif
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70 | return (0);
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71 | }
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72 |
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73 | int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
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74 | {
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75 | if (to->type == EVP_PKEY_NONE) {
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76 | if (EVP_PKEY_set_type(to, from->type) == 0)
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77 | return 0;
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78 | } else if (to->type != from->type) {
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79 | EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
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80 | goto err;
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81 | }
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82 |
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83 | if (EVP_PKEY_missing_parameters(from)) {
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84 | EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
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85 | goto err;
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86 | }
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87 |
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88 | if (!EVP_PKEY_missing_parameters(to)) {
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89 | if (EVP_PKEY_cmp_parameters(to, from) == 1)
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90 | return 1;
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91 | EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
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92 | return 0;
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93 | }
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94 |
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95 | if (from->ameth && from->ameth->param_copy)
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96 | return from->ameth->param_copy(to, from);
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97 | err:
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98 | return 0;
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99 | }
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100 |
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101 | int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
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102 | {
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103 | if (pkey->ameth && pkey->ameth->param_missing)
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104 | return pkey->ameth->param_missing(pkey);
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105 | return 0;
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106 | }
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107 |
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108 | int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
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109 | {
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110 | if (a->type != b->type)
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111 | return -1;
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112 | if (a->ameth && a->ameth->param_cmp)
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113 | return a->ameth->param_cmp(a, b);
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114 | return -2;
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115 | }
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116 |
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117 | int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
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118 | {
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119 | if (a->type != b->type)
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120 | return -1;
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121 |
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122 | if (a->ameth) {
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123 | int ret;
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124 | /* Compare parameters if the algorithm has them */
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125 | if (a->ameth->param_cmp) {
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126 | ret = a->ameth->param_cmp(a, b);
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127 | if (ret <= 0)
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128 | return ret;
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129 | }
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130 |
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131 | if (a->ameth->pub_cmp)
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132 | return a->ameth->pub_cmp(a, b);
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133 | }
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134 |
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135 | return -2;
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136 | }
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137 |
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138 | EVP_PKEY *EVP_PKEY_new(void)
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139 | {
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140 | EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
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141 |
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142 | if (ret == NULL) {
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143 | EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
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144 | return NULL;
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145 | }
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146 | ret->type = EVP_PKEY_NONE;
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147 | ret->save_type = EVP_PKEY_NONE;
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148 | ret->references = 1;
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149 | ret->save_parameters = 1;
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150 | ret->lock = CRYPTO_THREAD_lock_new();
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151 | if (ret->lock == NULL) {
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152 | EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
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153 | OPENSSL_free(ret);
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154 | return NULL;
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155 | }
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156 | return ret;
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157 | }
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158 |
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159 | int EVP_PKEY_up_ref(EVP_PKEY *pkey)
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160 | {
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161 | int i;
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162 |
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163 | if (CRYPTO_atomic_add(&pkey->references, 1, &i, pkey->lock) <= 0)
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164 | return 0;
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165 |
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166 | REF_PRINT_COUNT("EVP_PKEY", pkey);
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167 | REF_ASSERT_ISNT(i < 2);
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168 | return ((i > 1) ? 1 : 0);
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169 | }
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170 |
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171 | /*
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172 | * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
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173 | * is NULL just return 1 or 0 if the algorithm exists.
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174 | */
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175 |
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176 | static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len)
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177 | {
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178 | const EVP_PKEY_ASN1_METHOD *ameth;
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179 | ENGINE *e = NULL;
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180 | if (pkey) {
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181 | if (pkey->pkey.ptr)
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182 | EVP_PKEY_free_it(pkey);
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183 | /*
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184 | * If key type matches and a method exists then this lookup has
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185 | * succeeded once so just indicate success.
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186 | */
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187 | if ((type == pkey->save_type) && pkey->ameth)
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188 | return 1;
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189 | #ifndef OPENSSL_NO_ENGINE
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190 | /* If we have an ENGINE release it */
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191 | ENGINE_finish(pkey->engine);
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192 | pkey->engine = NULL;
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193 | #endif
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194 | }
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195 | if (str)
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196 | ameth = EVP_PKEY_asn1_find_str(&e, str, len);
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197 | else
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198 | ameth = EVP_PKEY_asn1_find(&e, type);
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199 | #ifndef OPENSSL_NO_ENGINE
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200 | if (pkey == NULL)
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201 | ENGINE_finish(e);
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202 | #endif
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203 | if (ameth == NULL) {
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204 | EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
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205 | return 0;
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206 | }
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207 | if (pkey) {
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208 | pkey->ameth = ameth;
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209 | pkey->engine = e;
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210 |
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211 | pkey->type = pkey->ameth->pkey_id;
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212 | pkey->save_type = type;
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213 | }
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214 | return 1;
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215 | }
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216 |
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217 | int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
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218 | {
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219 | return pkey_set_type(pkey, type, NULL, -1);
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220 | }
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221 |
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222 | int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
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223 | {
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224 | return pkey_set_type(pkey, EVP_PKEY_NONE, str, len);
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225 | }
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226 |
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227 | int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
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228 | {
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229 | if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
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230 | return 0;
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231 | pkey->pkey.ptr = key;
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232 | return (key != NULL);
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233 | }
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234 |
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235 | void *EVP_PKEY_get0(const EVP_PKEY *pkey)
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236 | {
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237 | return pkey->pkey.ptr;
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238 | }
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239 |
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240 | const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
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241 | {
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242 | ASN1_OCTET_STRING *os = NULL;
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243 | if (pkey->type != EVP_PKEY_HMAC) {
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244 | EVPerr(EVP_F_EVP_PKEY_GET0_HMAC, EVP_R_EXPECTING_AN_HMAC_KEY);
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245 | return NULL;
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246 | }
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247 | os = EVP_PKEY_get0(pkey);
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248 | *len = os->length;
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249 | return os->data;
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250 | }
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251 |
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252 | #ifndef OPENSSL_NO_RSA
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253 | int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
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254 | {
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255 | int ret = EVP_PKEY_assign_RSA(pkey, key);
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256 | if (ret)
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257 | RSA_up_ref(key);
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258 | return ret;
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259 | }
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260 |
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261 | RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey)
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262 | {
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263 | if (pkey->type != EVP_PKEY_RSA) {
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264 | EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
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265 | return NULL;
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266 | }
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267 | return pkey->pkey.rsa;
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268 | }
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269 |
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270 | RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
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271 | {
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272 | RSA *ret = EVP_PKEY_get0_RSA(pkey);
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273 | if (ret != NULL)
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274 | RSA_up_ref(ret);
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275 | return ret;
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276 | }
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277 | #endif
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278 |
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279 | #ifndef OPENSSL_NO_DSA
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280 | int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
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281 | {
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282 | int ret = EVP_PKEY_assign_DSA(pkey, key);
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283 | if (ret)
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284 | DSA_up_ref(key);
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285 | return ret;
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286 | }
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287 |
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288 | DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey)
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289 | {
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290 | if (pkey->type != EVP_PKEY_DSA) {
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291 | EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
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292 | return NULL;
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293 | }
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294 | return pkey->pkey.dsa;
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295 | }
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296 |
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297 | DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
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298 | {
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299 | DSA *ret = EVP_PKEY_get0_DSA(pkey);
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300 | if (ret != NULL)
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301 | DSA_up_ref(ret);
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302 | return ret;
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303 | }
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304 | #endif
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305 |
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306 | #ifndef OPENSSL_NO_EC
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307 |
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308 | int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
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309 | {
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310 | int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
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311 | if (ret)
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312 | EC_KEY_up_ref(key);
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313 | return ret;
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314 | }
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315 |
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316 | EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)
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317 | {
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318 | if (pkey->type != EVP_PKEY_EC) {
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319 | EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
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320 | return NULL;
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321 | }
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322 | return pkey->pkey.ec;
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323 | }
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324 |
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325 | EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
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326 | {
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327 | EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
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328 | if (ret != NULL)
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329 | EC_KEY_up_ref(ret);
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330 | return ret;
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331 | }
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332 | #endif
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333 |
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334 | #ifndef OPENSSL_NO_DH
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335 |
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336 | int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
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337 | {
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338 | int ret = EVP_PKEY_assign_DH(pkey, key);
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339 | if (ret)
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340 | DH_up_ref(key);
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341 | return ret;
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342 | }
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343 |
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344 | DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey)
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345 | {
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346 | if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
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347 | EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
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348 | return NULL;
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349 | }
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350 | return pkey->pkey.dh;
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351 | }
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352 |
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353 | DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
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354 | {
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355 | DH *ret = EVP_PKEY_get0_DH(pkey);
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356 | if (ret != NULL)
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357 | DH_up_ref(ret);
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358 | return ret;
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359 | }
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360 | #endif
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361 |
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362 | int EVP_PKEY_type(int type)
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363 | {
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364 | int ret;
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365 | const EVP_PKEY_ASN1_METHOD *ameth;
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366 | ENGINE *e;
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367 | ameth = EVP_PKEY_asn1_find(&e, type);
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368 | if (ameth)
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369 | ret = ameth->pkey_id;
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370 | else
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371 | ret = NID_undef;
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372 | #ifndef OPENSSL_NO_ENGINE
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373 | ENGINE_finish(e);
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374 | #endif
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375 | return ret;
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376 | }
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377 |
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378 | int EVP_PKEY_id(const EVP_PKEY *pkey)
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379 | {
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380 | return pkey->type;
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381 | }
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382 |
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383 | int EVP_PKEY_base_id(const EVP_PKEY *pkey)
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384 | {
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385 | return EVP_PKEY_type(pkey->type);
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386 | }
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387 |
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388 | void EVP_PKEY_free(EVP_PKEY *x)
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389 | {
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390 | int i;
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391 |
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392 | if (x == NULL)
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393 | return;
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394 |
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395 | CRYPTO_atomic_add(&x->references, -1, &i, x->lock);
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396 | REF_PRINT_COUNT("EVP_PKEY", x);
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397 | if (i > 0)
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398 | return;
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399 | REF_ASSERT_ISNT(i < 0);
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400 | EVP_PKEY_free_it(x);
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401 | CRYPTO_THREAD_lock_free(x->lock);
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402 | sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
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403 | OPENSSL_free(x);
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404 | }
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405 |
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406 | static void EVP_PKEY_free_it(EVP_PKEY *x)
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407 | {
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408 | /* internal function; x is never NULL */
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409 | if (x->ameth && x->ameth->pkey_free) {
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410 | x->ameth->pkey_free(x);
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411 | x->pkey.ptr = NULL;
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412 | }
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413 | #ifndef OPENSSL_NO_ENGINE
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414 | ENGINE_finish(x->engine);
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415 | x->engine = NULL;
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416 | #endif
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417 | }
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418 |
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419 | static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
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420 | const char *kstr)
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421 | {
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422 | BIO_indent(out, indent, 128);
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423 | BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
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424 | kstr, OBJ_nid2ln(pkey->type));
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425 | return 1;
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426 | }
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427 |
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428 | int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
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429 | int indent, ASN1_PCTX *pctx)
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430 | {
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431 | if (pkey->ameth && pkey->ameth->pub_print)
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432 | return pkey->ameth->pub_print(out, pkey, indent, pctx);
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433 |
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434 | return unsup_alg(out, pkey, indent, "Public Key");
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435 | }
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436 |
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437 | int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
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438 | int indent, ASN1_PCTX *pctx)
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439 | {
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440 | if (pkey->ameth && pkey->ameth->priv_print)
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441 | return pkey->ameth->priv_print(out, pkey, indent, pctx);
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442 |
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443 | return unsup_alg(out, pkey, indent, "Private Key");
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444 | }
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445 |
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446 | int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
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447 | int indent, ASN1_PCTX *pctx)
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448 | {
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449 | if (pkey->ameth && pkey->ameth->param_print)
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450 | return pkey->ameth->param_print(out, pkey, indent, pctx);
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451 | return unsup_alg(out, pkey, indent, "Parameters");
|
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452 | }
|
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453 |
|
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454 | static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2)
|
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455 | {
|
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456 | if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL)
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457 | return -2;
|
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458 | return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2);
|
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459 | }
|
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460 |
|
---|
461 | int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
|
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462 | {
|
---|
463 | return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
|
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464 | }
|
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465 |
|
---|
466 | int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
|
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467 | const unsigned char *pt, size_t ptlen)
|
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468 | {
|
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469 | if (ptlen > INT_MAX)
|
---|
470 | return 0;
|
---|
471 | if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, ptlen,
|
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472 | (void *)pt) <= 0)
|
---|
473 | return 0;
|
---|
474 | return 1;
|
---|
475 | }
|
---|
476 |
|
---|
477 | size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt)
|
---|
478 | {
|
---|
479 | int rv;
|
---|
480 | rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppt);
|
---|
481 | if (rv <= 0)
|
---|
482 | return 0;
|
---|
483 | return rv;
|
---|
484 | }
|
---|