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/evp.h>
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13 | #include <openssl/objects.h>
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14 | #include "internal/evp_int.h"
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15 | #include "evp_locl.h"
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16 |
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17 | int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
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18 | {
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19 | int ret;
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20 |
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21 | if (c->cipher->set_asn1_parameters != NULL)
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22 | ret = c->cipher->set_asn1_parameters(c, type);
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23 | else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
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24 | switch (EVP_CIPHER_CTX_mode(c)) {
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25 | case EVP_CIPH_WRAP_MODE:
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26 | if (EVP_CIPHER_CTX_nid(c) == NID_id_smime_alg_CMS3DESwrap)
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27 | ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
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28 | ret = 1;
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29 | break;
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30 |
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31 | case EVP_CIPH_GCM_MODE:
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32 | case EVP_CIPH_CCM_MODE:
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33 | case EVP_CIPH_XTS_MODE:
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34 | case EVP_CIPH_OCB_MODE:
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35 | ret = -1;
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36 | break;
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37 |
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38 | default:
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39 | ret = EVP_CIPHER_set_asn1_iv(c, type);
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40 | }
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41 | } else
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42 | ret = -1;
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43 | return (ret);
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44 | }
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45 |
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46 | int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
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47 | {
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48 | int ret;
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49 |
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50 | if (c->cipher->get_asn1_parameters != NULL)
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51 | ret = c->cipher->get_asn1_parameters(c, type);
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52 | else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) {
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53 | switch (EVP_CIPHER_CTX_mode(c)) {
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54 |
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55 | case EVP_CIPH_WRAP_MODE:
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56 | ret = 1;
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57 | break;
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58 |
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59 | case EVP_CIPH_GCM_MODE:
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60 | case EVP_CIPH_CCM_MODE:
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61 | case EVP_CIPH_XTS_MODE:
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62 | case EVP_CIPH_OCB_MODE:
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63 | ret = -1;
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64 | break;
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65 |
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66 | default:
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67 | ret = EVP_CIPHER_get_asn1_iv(c, type);
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68 | break;
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69 | }
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70 | } else
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71 | ret = -1;
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72 | return (ret);
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73 | }
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74 |
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75 | int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
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76 | {
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77 | int i = 0;
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78 | unsigned int l;
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79 |
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80 | if (type != NULL) {
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81 | l = EVP_CIPHER_CTX_iv_length(c);
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82 | OPENSSL_assert(l <= sizeof(c->iv));
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83 | i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
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84 | if (i != (int)l)
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85 | return (-1);
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86 | else if (i > 0)
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87 | memcpy(c->iv, c->oiv, l);
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88 | }
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89 | return (i);
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90 | }
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91 |
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92 | int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
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93 | {
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94 | int i = 0;
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95 | unsigned int j;
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96 |
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97 | if (type != NULL) {
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98 | j = EVP_CIPHER_CTX_iv_length(c);
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99 | OPENSSL_assert(j <= sizeof(c->iv));
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100 | i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
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101 | }
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102 | return (i);
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103 | }
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104 |
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105 | /* Convert the various cipher NIDs and dummies to a proper OID NID */
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106 | int EVP_CIPHER_type(const EVP_CIPHER *ctx)
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107 | {
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108 | int nid;
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109 | ASN1_OBJECT *otmp;
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110 | nid = EVP_CIPHER_nid(ctx);
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111 |
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112 | switch (nid) {
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113 |
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114 | case NID_rc2_cbc:
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115 | case NID_rc2_64_cbc:
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116 | case NID_rc2_40_cbc:
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117 |
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118 | return NID_rc2_cbc;
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119 |
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120 | case NID_rc4:
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121 | case NID_rc4_40:
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122 |
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123 | return NID_rc4;
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124 |
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125 | case NID_aes_128_cfb128:
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126 | case NID_aes_128_cfb8:
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127 | case NID_aes_128_cfb1:
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128 |
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129 | return NID_aes_128_cfb128;
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130 |
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131 | case NID_aes_192_cfb128:
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132 | case NID_aes_192_cfb8:
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133 | case NID_aes_192_cfb1:
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134 |
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135 | return NID_aes_192_cfb128;
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136 |
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137 | case NID_aes_256_cfb128:
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138 | case NID_aes_256_cfb8:
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139 | case NID_aes_256_cfb1:
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140 |
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141 | return NID_aes_256_cfb128;
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142 |
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143 | case NID_des_cfb64:
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144 | case NID_des_cfb8:
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145 | case NID_des_cfb1:
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146 |
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147 | return NID_des_cfb64;
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148 |
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149 | case NID_des_ede3_cfb64:
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150 | case NID_des_ede3_cfb8:
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151 | case NID_des_ede3_cfb1:
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152 |
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153 | return NID_des_cfb64;
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154 |
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155 | default:
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156 | /* Check it has an OID and it is valid */
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157 | otmp = OBJ_nid2obj(nid);
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158 | if (OBJ_get0_data(otmp) == NULL)
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159 | nid = NID_undef;
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160 | ASN1_OBJECT_free(otmp);
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161 | return nid;
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162 | }
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163 | }
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164 |
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165 | int EVP_CIPHER_block_size(const EVP_CIPHER *e)
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166 | {
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167 | return e->block_size;
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168 | }
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169 |
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170 | int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
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171 | {
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172 | return ctx->cipher->block_size;
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173 | }
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174 |
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175 | int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *e)
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176 | {
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177 | return e->ctx_size;
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178 | }
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179 |
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180 | int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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181 | const unsigned char *in, unsigned int inl)
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182 | {
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183 | return ctx->cipher->do_cipher(ctx, out, in, inl);
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184 | }
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185 |
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186 | const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
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187 | {
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188 | return ctx->cipher;
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189 | }
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190 |
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191 | int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx)
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192 | {
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193 | return ctx->encrypt;
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194 | }
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195 |
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196 | unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
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197 | {
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198 | return cipher->flags;
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199 | }
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200 |
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201 | void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
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202 | {
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203 | return ctx->app_data;
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204 | }
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205 |
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206 | void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
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207 | {
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208 | ctx->app_data = data;
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209 | }
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210 |
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211 | void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx)
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212 | {
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213 | return ctx->cipher_data;
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214 | }
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215 |
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216 | void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data)
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217 | {
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218 | void *old_cipher_data;
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219 |
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220 | old_cipher_data = ctx->cipher_data;
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221 | ctx->cipher_data = cipher_data;
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222 |
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223 | return old_cipher_data;
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224 | }
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225 |
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226 | int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
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227 | {
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228 | return cipher->iv_len;
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229 | }
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230 |
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231 | int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
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232 | {
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233 | return ctx->cipher->iv_len;
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234 | }
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235 |
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236 | const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
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237 | {
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238 | return ctx->oiv;
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239 | }
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240 |
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241 | const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx)
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242 | {
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243 | return ctx->iv;
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244 | }
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245 |
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246 | unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx)
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247 | {
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248 | return ctx->iv;
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249 | }
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250 |
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251 | unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx)
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252 | {
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253 | return ctx->buf;
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254 | }
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255 |
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256 | int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx)
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257 | {
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258 | return ctx->num;
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259 | }
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260 |
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261 | void EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
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262 | {
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263 | ctx->num = num;
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264 | }
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265 |
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266 | int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
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267 | {
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268 | return cipher->key_len;
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269 | }
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270 |
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271 | int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
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272 | {
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273 | return ctx->key_len;
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274 | }
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275 |
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276 | int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
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277 | {
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278 | return cipher->nid;
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279 | }
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280 |
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281 | int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
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282 | {
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283 | return ctx->cipher->nid;
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284 | }
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285 |
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286 | int EVP_MD_block_size(const EVP_MD *md)
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287 | {
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288 | return md->block_size;
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289 | }
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290 |
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291 | int EVP_MD_type(const EVP_MD *md)
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292 | {
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293 | return md->type;
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294 | }
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295 |
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296 | int EVP_MD_pkey_type(const EVP_MD *md)
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297 | {
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298 | return md->pkey_type;
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299 | }
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300 |
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301 | int EVP_MD_size(const EVP_MD *md)
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302 | {
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303 | if (!md) {
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304 | EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
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305 | return -1;
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306 | }
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307 | return md->md_size;
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308 | }
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309 |
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310 | unsigned long EVP_MD_flags(const EVP_MD *md)
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311 | {
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312 | return md->flags;
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313 | }
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314 |
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315 | EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
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316 | {
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317 | EVP_MD *md = OPENSSL_zalloc(sizeof(*md));
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318 |
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319 | if (md != NULL) {
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320 | md->type = md_type;
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321 | md->pkey_type = pkey_type;
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322 | }
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323 | return md;
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324 | }
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325 | EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
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326 | {
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327 | EVP_MD *to = EVP_MD_meth_new(md->type, md->pkey_type);
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328 |
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329 | if (to != NULL)
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330 | memcpy(to, md, sizeof(*to));
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331 | return to;
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332 | }
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333 | void EVP_MD_meth_free(EVP_MD *md)
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334 | {
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335 | OPENSSL_free(md);
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336 | }
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337 | int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
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338 | {
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339 | md->block_size = blocksize;
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340 | return 1;
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341 | }
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342 | int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
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343 | {
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344 | md->md_size = resultsize;
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345 | return 1;
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346 | }
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347 | int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
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348 | {
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349 | md->ctx_size = datasize;
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350 | return 1;
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351 | }
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352 | int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
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353 | {
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354 | md->flags = flags;
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355 | return 1;
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356 | }
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357 | int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
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358 | {
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359 | md->init = init;
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360 | return 1;
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361 | }
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362 | int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
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363 | const void *data,
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364 | size_t count))
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365 | {
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366 | md->update = update;
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367 | return 1;
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368 | }
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369 | int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
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370 | unsigned char *md))
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371 | {
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372 | md->final = final;
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373 | return 1;
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374 | }
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375 | int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
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376 | const EVP_MD_CTX *from))
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377 | {
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378 | md->copy = copy;
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379 | return 1;
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380 | }
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381 | int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
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382 | {
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383 | md->cleanup = cleanup;
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384 | return 1;
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385 | }
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386 | int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
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387 | int p1, void *p2))
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388 | {
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389 | md->md_ctrl = ctrl;
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390 | return 1;
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391 | }
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392 |
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393 | int EVP_MD_meth_get_input_blocksize(const EVP_MD *md)
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394 | {
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395 | return md->block_size;
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396 | }
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397 | int EVP_MD_meth_get_result_size(const EVP_MD *md)
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398 | {
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399 | return md->md_size;
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400 | }
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401 | int EVP_MD_meth_get_app_datasize(const EVP_MD *md)
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402 | {
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403 | return md->ctx_size;
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404 | }
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405 | unsigned long EVP_MD_meth_get_flags(const EVP_MD *md)
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406 | {
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407 | return md->flags;
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408 | }
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409 | int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx)
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410 | {
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411 | return md->init;
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412 | }
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413 | int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
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414 | const void *data,
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415 | size_t count)
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416 | {
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417 | return md->update;
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418 | }
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419 | int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
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420 | unsigned char *md)
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421 | {
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422 | return md->final;
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423 | }
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424 | int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
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425 | const EVP_MD_CTX *from)
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426 | {
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427 | return md->copy;
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428 | }
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429 | int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx)
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430 | {
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431 | return md->cleanup;
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432 | }
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433 | int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
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434 | int p1, void *p2)
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435 | {
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436 | return md->md_ctrl;
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437 | }
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438 |
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439 | const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
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440 | {
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441 | if (!ctx)
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442 | return NULL;
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443 | return ctx->digest;
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444 | }
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445 |
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446 | EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
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447 | {
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448 | return ctx->pctx;
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449 | }
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450 |
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451 | void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
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452 | {
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453 | return ctx->md_data;
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454 | }
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455 |
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456 | int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
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457 | const void *data, size_t count)
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458 | {
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459 | return ctx->update;
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460 | }
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461 |
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462 | void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
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463 | int (*update) (EVP_MD_CTX *ctx,
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464 | const void *data, size_t count))
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465 | {
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466 | ctx->update = update;
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467 | }
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468 |
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469 | void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
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470 | {
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471 | ctx->flags |= flags;
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472 | }
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473 |
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474 | void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
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475 | {
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476 | ctx->flags &= ~flags;
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477 | }
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478 |
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479 | int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
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480 | {
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481 | return (ctx->flags & flags);
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482 | }
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483 |
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484 | void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
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485 | {
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486 | ctx->flags |= flags;
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487 | }
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488 |
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489 | void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
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490 | {
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491 | ctx->flags &= ~flags;
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492 | }
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493 |
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494 | int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
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495 | {
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496 | return (ctx->flags & flags);
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497 | }
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