1 | /*
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2 | * Copyright 2006-2016 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/asn1t.h>
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13 | #include <openssl/x509.h>
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14 | #include <openssl/engine.h>
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15 | #include "internal/asn1_int.h"
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16 | #include "internal/evp_int.h"
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17 |
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18 | /* Keep this sorted in type order !! */
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19 | static const EVP_PKEY_ASN1_METHOD *standard_methods[] = {
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20 | #ifndef OPENSSL_NO_RSA
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21 | &rsa_asn1_meths[0],
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22 | &rsa_asn1_meths[1],
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23 | #endif
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24 | #ifndef OPENSSL_NO_DH
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25 | &dh_asn1_meth,
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26 | #endif
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27 | #ifndef OPENSSL_NO_DSA
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28 | &dsa_asn1_meths[0],
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29 | &dsa_asn1_meths[1],
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30 | &dsa_asn1_meths[2],
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31 | &dsa_asn1_meths[3],
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32 | &dsa_asn1_meths[4],
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33 | #endif
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34 | #ifndef OPENSSL_NO_EC
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35 | &eckey_asn1_meth,
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36 | #endif
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37 | &hmac_asn1_meth,
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38 | #ifndef OPENSSL_NO_CMAC
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39 | &cmac_asn1_meth,
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40 | #endif
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41 | #ifndef OPENSSL_NO_DH
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42 | &dhx_asn1_meth,
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43 | #endif
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44 | #ifndef OPENSSL_NO_EC
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45 | &ecx25519_asn1_meth
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46 | #endif
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47 | };
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48 |
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49 | typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
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50 | static STACK_OF(EVP_PKEY_ASN1_METHOD) *app_methods = NULL;
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51 |
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52 | #ifdef TEST
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53 | void main()
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54 | {
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55 | int i;
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56 | for (i = 0; i < OSSL_NELEM(standard_methods); i++)
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57 | fprintf(stderr, "Number %d id=%d (%s)\n", i,
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58 | standard_methods[i]->pkey_id,
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59 | OBJ_nid2sn(standard_methods[i]->pkey_id));
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60 | }
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61 | #endif
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62 |
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63 | DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
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64 | const EVP_PKEY_ASN1_METHOD *, ameth);
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65 |
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66 | static int ameth_cmp(const EVP_PKEY_ASN1_METHOD *const *a,
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67 | const EVP_PKEY_ASN1_METHOD *const *b)
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68 | {
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69 | return ((*a)->pkey_id - (*b)->pkey_id);
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70 | }
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71 |
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72 | IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
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73 | const EVP_PKEY_ASN1_METHOD *, ameth);
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74 |
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75 | int EVP_PKEY_asn1_get_count(void)
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76 | {
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77 | int num = OSSL_NELEM(standard_methods);
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78 | if (app_methods)
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79 | num += sk_EVP_PKEY_ASN1_METHOD_num(app_methods);
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80 | return num;
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81 | }
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82 |
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83 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx)
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84 | {
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85 | int num = OSSL_NELEM(standard_methods);
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86 | if (idx < 0)
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87 | return NULL;
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88 | if (idx < num)
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89 | return standard_methods[idx];
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90 | idx -= num;
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91 | return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
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92 | }
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93 |
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94 | static const EVP_PKEY_ASN1_METHOD *pkey_asn1_find(int type)
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95 | {
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96 | EVP_PKEY_ASN1_METHOD tmp;
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97 | const EVP_PKEY_ASN1_METHOD *t = &tmp, **ret;
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98 | tmp.pkey_id = type;
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99 | if (app_methods) {
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100 | int idx;
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101 | idx = sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp);
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102 | if (idx >= 0)
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103 | return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
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104 | }
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105 | ret = OBJ_bsearch_ameth(&t, standard_methods, OSSL_NELEM(standard_methods));
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106 | if (!ret || !*ret)
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107 | return NULL;
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108 | return *ret;
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109 | }
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110 |
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111 | /*
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112 | * Find an implementation of an ASN1 algorithm. If 'pe' is not NULL also
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113 | * search through engines and set *pe to a functional reference to the engine
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114 | * implementing 'type' or NULL if no engine implements it.
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115 | */
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116 |
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117 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type)
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118 | {
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119 | const EVP_PKEY_ASN1_METHOD *t;
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120 |
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121 | for (;;) {
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122 | t = pkey_asn1_find(type);
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123 | if (!t || !(t->pkey_flags & ASN1_PKEY_ALIAS))
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124 | break;
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125 | type = t->pkey_base_id;
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126 | }
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127 | if (pe) {
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128 | #ifndef OPENSSL_NO_ENGINE
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129 | ENGINE *e;
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130 | /* type will contain the final unaliased type */
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131 | e = ENGINE_get_pkey_asn1_meth_engine(type);
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132 | if (e) {
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133 | *pe = e;
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134 | return ENGINE_get_pkey_asn1_meth(e, type);
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135 | }
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136 | #endif
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137 | *pe = NULL;
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138 | }
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139 | return t;
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140 | }
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141 |
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142 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
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143 | const char *str, int len)
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144 | {
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145 | int i;
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146 | const EVP_PKEY_ASN1_METHOD *ameth;
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147 | if (len == -1)
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148 | len = strlen(str);
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149 | if (pe) {
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150 | #ifndef OPENSSL_NO_ENGINE
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151 | ENGINE *e;
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152 | ameth = ENGINE_pkey_asn1_find_str(&e, str, len);
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153 | if (ameth) {
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154 | /*
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155 | * Convert structural into functional reference
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156 | */
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157 | if (!ENGINE_init(e))
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158 | ameth = NULL;
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159 | ENGINE_free(e);
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160 | *pe = e;
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161 | return ameth;
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162 | }
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163 | #endif
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164 | *pe = NULL;
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165 | }
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166 | for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) {
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167 | ameth = EVP_PKEY_asn1_get0(i);
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168 | if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
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169 | continue;
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170 | if (((int)strlen(ameth->pem_str) == len)
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171 | && (strncasecmp(ameth->pem_str, str, len) == 0))
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172 | return ameth;
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173 | }
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174 | return NULL;
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175 | }
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176 |
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177 | int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth)
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178 | {
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179 | if (app_methods == NULL) {
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180 | app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp);
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181 | if (app_methods == NULL)
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182 | return 0;
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183 | }
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184 | if (!sk_EVP_PKEY_ASN1_METHOD_push(app_methods, ameth))
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185 | return 0;
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186 | sk_EVP_PKEY_ASN1_METHOD_sort(app_methods);
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187 | return 1;
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188 | }
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189 |
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190 | int EVP_PKEY_asn1_add_alias(int to, int from)
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191 | {
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192 | EVP_PKEY_ASN1_METHOD *ameth;
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193 | ameth = EVP_PKEY_asn1_new(from, ASN1_PKEY_ALIAS, NULL, NULL);
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194 | if (ameth == NULL)
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195 | return 0;
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196 | ameth->pkey_base_id = to;
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197 | if (!EVP_PKEY_asn1_add0(ameth)) {
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198 | EVP_PKEY_asn1_free(ameth);
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199 | return 0;
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200 | }
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201 | return 1;
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202 | }
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203 |
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204 | int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *ppkey_base_id,
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205 | int *ppkey_flags, const char **pinfo,
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206 | const char **ppem_str,
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207 | const EVP_PKEY_ASN1_METHOD *ameth)
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208 | {
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209 | if (!ameth)
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210 | return 0;
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211 | if (ppkey_id)
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212 | *ppkey_id = ameth->pkey_id;
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213 | if (ppkey_base_id)
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214 | *ppkey_base_id = ameth->pkey_base_id;
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215 | if (ppkey_flags)
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216 | *ppkey_flags = ameth->pkey_flags;
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217 | if (pinfo)
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218 | *pinfo = ameth->info;
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219 | if (ppem_str)
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220 | *ppem_str = ameth->pem_str;
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221 | return 1;
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222 | }
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223 |
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224 | const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(const EVP_PKEY *pkey)
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225 | {
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226 | return pkey->ameth;
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227 | }
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228 |
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229 | EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
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230 | const char *pem_str, const char *info)
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231 | {
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232 | EVP_PKEY_ASN1_METHOD *ameth = OPENSSL_zalloc(sizeof(*ameth));
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233 |
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234 | if (ameth == NULL)
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235 | return NULL;
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236 |
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237 | ameth->pkey_id = id;
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238 | ameth->pkey_base_id = id;
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239 | ameth->pkey_flags = flags | ASN1_PKEY_DYNAMIC;
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240 |
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241 | if (info) {
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242 | ameth->info = OPENSSL_strdup(info);
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243 | if (!ameth->info)
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244 | goto err;
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245 | }
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246 |
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247 | if (pem_str) {
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248 | ameth->pem_str = OPENSSL_strdup(pem_str);
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249 | if (!ameth->pem_str)
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250 | goto err;
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251 | }
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252 |
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253 | return ameth;
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254 |
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255 | err:
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256 | EVP_PKEY_asn1_free(ameth);
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257 | return NULL;
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258 |
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259 | }
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260 |
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261 | void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
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262 | const EVP_PKEY_ASN1_METHOD *src)
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263 | {
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264 |
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265 | dst->pub_decode = src->pub_decode;
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266 | dst->pub_encode = src->pub_encode;
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267 | dst->pub_cmp = src->pub_cmp;
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268 | dst->pub_print = src->pub_print;
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269 |
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270 | dst->priv_decode = src->priv_decode;
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271 | dst->priv_encode = src->priv_encode;
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272 | dst->priv_print = src->priv_print;
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273 |
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274 | dst->old_priv_encode = src->old_priv_encode;
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275 | dst->old_priv_decode = src->old_priv_decode;
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276 |
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277 | dst->pkey_size = src->pkey_size;
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278 | dst->pkey_bits = src->pkey_bits;
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279 |
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280 | dst->param_decode = src->param_decode;
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281 | dst->param_encode = src->param_encode;
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282 | dst->param_missing = src->param_missing;
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283 | dst->param_copy = src->param_copy;
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284 | dst->param_cmp = src->param_cmp;
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285 | dst->param_print = src->param_print;
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286 |
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287 | dst->pkey_free = src->pkey_free;
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288 | dst->pkey_ctrl = src->pkey_ctrl;
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289 |
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290 | dst->item_sign = src->item_sign;
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291 | dst->item_verify = src->item_verify;
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292 |
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293 | }
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294 |
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295 | void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth)
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296 | {
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297 | if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC)) {
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298 | OPENSSL_free(ameth->pem_str);
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299 | OPENSSL_free(ameth->info);
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300 | OPENSSL_free(ameth);
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301 | }
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302 | }
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303 |
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304 | void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
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305 | int (*pub_decode) (EVP_PKEY *pk,
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306 | X509_PUBKEY *pub),
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307 | int (*pub_encode) (X509_PUBKEY *pub,
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308 | const EVP_PKEY *pk),
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309 | int (*pub_cmp) (const EVP_PKEY *a,
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310 | const EVP_PKEY *b),
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311 | int (*pub_print) (BIO *out,
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312 | const EVP_PKEY *pkey,
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313 | int indent, ASN1_PCTX *pctx),
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314 | int (*pkey_size) (const EVP_PKEY *pk),
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315 | int (*pkey_bits) (const EVP_PKEY *pk))
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316 | {
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317 | ameth->pub_decode = pub_decode;
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318 | ameth->pub_encode = pub_encode;
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319 | ameth->pub_cmp = pub_cmp;
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320 | ameth->pub_print = pub_print;
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321 | ameth->pkey_size = pkey_size;
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322 | ameth->pkey_bits = pkey_bits;
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323 | }
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324 |
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325 | void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
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326 | int (*priv_decode) (EVP_PKEY *pk,
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327 | const PKCS8_PRIV_KEY_INFO
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328 | *p8inf),
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329 | int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
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330 | const EVP_PKEY *pk),
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331 | int (*priv_print) (BIO *out,
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332 | const EVP_PKEY *pkey,
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333 | int indent,
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334 | ASN1_PCTX *pctx))
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335 | {
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336 | ameth->priv_decode = priv_decode;
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337 | ameth->priv_encode = priv_encode;
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338 | ameth->priv_print = priv_print;
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339 | }
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340 |
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341 | void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
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342 | int (*param_decode) (EVP_PKEY *pkey,
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343 | const unsigned char **pder,
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344 | int derlen),
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345 | int (*param_encode) (const EVP_PKEY *pkey,
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346 | unsigned char **pder),
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347 | int (*param_missing) (const EVP_PKEY *pk),
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348 | int (*param_copy) (EVP_PKEY *to,
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349 | const EVP_PKEY *from),
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350 | int (*param_cmp) (const EVP_PKEY *a,
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351 | const EVP_PKEY *b),
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352 | int (*param_print) (BIO *out,
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353 | const EVP_PKEY *pkey,
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354 | int indent, ASN1_PCTX *pctx))
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355 | {
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356 | ameth->param_decode = param_decode;
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357 | ameth->param_encode = param_encode;
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358 | ameth->param_missing = param_missing;
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359 | ameth->param_copy = param_copy;
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360 | ameth->param_cmp = param_cmp;
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361 | ameth->param_print = param_print;
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362 | }
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363 |
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364 | void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
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365 | void (*pkey_free) (EVP_PKEY *pkey))
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366 | {
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367 | ameth->pkey_free = pkey_free;
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368 | }
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369 |
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370 | void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
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371 | int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
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372 | long arg1, void *arg2))
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373 | {
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374 | ameth->pkey_ctrl = pkey_ctrl;
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375 | }
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376 |
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377 | void EVP_PKEY_asn1_set_security_bits(EVP_PKEY_ASN1_METHOD *ameth,
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378 | int (*pkey_security_bits) (const EVP_PKEY
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379 | *pk))
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380 | {
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381 | ameth->pkey_security_bits = pkey_security_bits;
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382 | }
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383 |
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384 | void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth,
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385 | int (*item_verify) (EVP_MD_CTX *ctx,
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386 | const ASN1_ITEM *it,
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387 | void *asn,
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388 | X509_ALGOR *a,
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389 | ASN1_BIT_STRING *sig,
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390 | EVP_PKEY *pkey),
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391 | int (*item_sign) (EVP_MD_CTX *ctx,
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392 | const ASN1_ITEM *it,
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393 | void *asn,
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394 | X509_ALGOR *alg1,
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395 | X509_ALGOR *alg2,
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396 | ASN1_BIT_STRING *sig))
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397 | {
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398 | ameth->item_sign = item_sign;
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399 | ameth->item_verify = item_verify;
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400 | }
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