1 | /*
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2 | * Copyright 2015-2016 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 <openssl/conf.h>
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12 | #include <openssl/ssl.h>
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13 | #include "ssl_locl.h"
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14 |
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15 | /* SSL library configuration module. */
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16 |
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17 | struct ssl_conf_name {
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18 | /* Name of this set of commands */
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19 | char *name;
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20 | /* List of commands */
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21 | struct ssl_conf_cmd *cmds;
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22 | /* Number of commands */
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23 | size_t cmd_count;
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24 | };
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25 |
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26 | struct ssl_conf_cmd {
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27 | /* Command */
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28 | char *cmd;
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29 | /* Argument */
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30 | char *arg;
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31 | };
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32 |
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33 | static struct ssl_conf_name *ssl_names;
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34 | static size_t ssl_names_count;
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35 |
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36 | static void ssl_module_free(CONF_IMODULE *md)
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37 | {
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38 | size_t i, j;
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39 | if (ssl_names == NULL)
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40 | return;
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41 | for (i = 0; i < ssl_names_count; i++) {
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42 | struct ssl_conf_name *tname = ssl_names + i;
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43 | OPENSSL_free(tname->name);
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44 | for (j = 0; j < tname->cmd_count; j++) {
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45 | OPENSSL_free(tname->cmds[j].cmd);
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46 | OPENSSL_free(tname->cmds[j].arg);
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47 | }
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48 | OPENSSL_free(tname->cmds);
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49 | }
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50 | OPENSSL_free(ssl_names);
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51 | ssl_names = NULL;
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52 | ssl_names_count = 0;
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53 | }
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54 |
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55 | static int ssl_module_init(CONF_IMODULE *md, const CONF *cnf)
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56 | {
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57 | size_t i, j, cnt;
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58 | int rv = 0;
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59 | const char *ssl_conf_section;
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60 | STACK_OF(CONF_VALUE) *cmd_lists;
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61 | ssl_conf_section = CONF_imodule_get_value(md);
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62 | cmd_lists = NCONF_get_section(cnf, ssl_conf_section);
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63 | if (sk_CONF_VALUE_num(cmd_lists) <= 0) {
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64 | if (cmd_lists == NULL)
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65 | SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_SECTION_NOT_FOUND);
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66 | else
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67 | SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_SECTION_EMPTY);
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68 | ERR_add_error_data(2, "section=", ssl_conf_section);
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69 | goto err;
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70 | }
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71 | cnt = sk_CONF_VALUE_num(cmd_lists);
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72 | ssl_names = OPENSSL_zalloc(sizeof(*ssl_names) * cnt);
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73 | ssl_names_count = cnt;
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74 | for (i = 0; i < ssl_names_count; i++) {
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75 | struct ssl_conf_name *ssl_name = ssl_names + i;
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76 | CONF_VALUE *sect = sk_CONF_VALUE_value(cmd_lists, i);
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77 | STACK_OF(CONF_VALUE) *cmds = NCONF_get_section(cnf, sect->value);
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78 | if (sk_CONF_VALUE_num(cmds) <= 0) {
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79 | if (cmds == NULL)
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80 | SSLerr(SSL_F_SSL_MODULE_INIT,
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81 | SSL_R_SSL_COMMAND_SECTION_NOT_FOUND);
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82 | else
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83 | SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_COMMAND_SECTION_EMPTY);
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84 | ERR_add_error_data(4, "name=", sect->name, ", value=", sect->value);
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85 | goto err;
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86 | }
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87 | ssl_name->name = BUF_strdup(sect->name);
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88 | if (ssl_name->name == NULL)
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89 | goto err;
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90 | cnt = sk_CONF_VALUE_num(cmds);
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91 | ssl_name->cmds = OPENSSL_zalloc(cnt * sizeof(struct ssl_conf_cmd));
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92 | if (ssl_name->cmds == NULL)
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93 | goto err;
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94 | ssl_name->cmd_count = cnt;
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95 | for (j = 0; j < cnt; j++) {
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96 | const char *name;
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97 | CONF_VALUE *cmd_conf = sk_CONF_VALUE_value(cmds, j);
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98 | struct ssl_conf_cmd *cmd = ssl_name->cmds + j;
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99 | /* Skip any initial dot in name */
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100 | name = strchr(cmd_conf->name, '.');
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101 | if (name != NULL)
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102 | name++;
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103 | else
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104 | name = cmd_conf->name;
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105 | cmd->cmd = BUF_strdup(name);
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106 | cmd->arg = BUF_strdup(cmd_conf->value);
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107 | if (cmd->cmd == NULL || cmd->arg == NULL)
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108 | goto err;
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109 | }
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110 |
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111 | }
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112 | rv = 1;
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113 | err:
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114 | if (rv == 0)
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115 | ssl_module_free(md);
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116 | return rv;
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117 | }
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118 |
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119 | void SSL_add_ssl_module(void)
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120 | {
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121 | CONF_module_add("ssl_conf", ssl_module_init, ssl_module_free);
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122 | }
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123 |
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124 | static const struct ssl_conf_name *ssl_name_find(const char *name)
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125 | {
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126 | size_t i;
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127 | const struct ssl_conf_name *nm;
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128 | if (name == NULL)
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129 | return NULL;
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130 | for (i = 0, nm = ssl_names; i < ssl_names_count; i++, nm++) {
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131 | if (strcmp(nm->name, name) == 0)
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132 | return nm;
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133 | }
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134 | return NULL;
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135 | }
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136 |
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137 | static int ssl_do_config(SSL *s, SSL_CTX *ctx, const char *name)
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138 | {
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139 | SSL_CONF_CTX *cctx = NULL;
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140 | size_t i;
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141 | int rv = 0;
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142 | unsigned int flags;
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143 | const SSL_METHOD *meth;
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144 | const struct ssl_conf_name *nm;
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145 | struct ssl_conf_cmd *cmd;
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146 | if (s == NULL && ctx == NULL) {
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147 | SSLerr(SSL_F_SSL_DO_CONFIG, ERR_R_PASSED_NULL_PARAMETER);
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148 | goto err;
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149 | }
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150 | nm = ssl_name_find(name);
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151 | if (nm == NULL) {
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152 | SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_INVALID_CONFIGURATION_NAME);
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153 | ERR_add_error_data(2, "name=", name);
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154 | goto err;
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155 | }
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156 | cctx = SSL_CONF_CTX_new();
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157 | if (cctx == NULL)
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158 | goto err;
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159 | flags = SSL_CONF_FLAG_FILE;
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160 | flags |= SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_REQUIRE_PRIVATE;
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161 | if (s != NULL) {
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162 | meth = s->method;
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163 | SSL_CONF_CTX_set_ssl(cctx, s);
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164 | } else {
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165 | meth = ctx->method;
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166 | SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
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167 | }
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168 | if (meth->ssl_accept != ssl_undefined_function)
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169 | flags |= SSL_CONF_FLAG_SERVER;
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170 | if (meth->ssl_connect != ssl_undefined_function)
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171 | flags |= SSL_CONF_FLAG_CLIENT;
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172 | SSL_CONF_CTX_set_flags(cctx, flags);
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173 | for (i = 0, cmd = nm->cmds; i < nm->cmd_count; i++, cmd++) {
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174 | rv = SSL_CONF_cmd(cctx, cmd->cmd, cmd->arg);
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175 | if (rv <= 0) {
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176 | if (rv == -2)
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177 | SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_UNKNOWN_COMMAND);
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178 | else
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179 | SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_BAD_VALUE);
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180 | ERR_add_error_data(6, "section=", name, ", cmd=", cmd->cmd,
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181 | ", arg=", cmd->arg);
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182 | goto err;
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183 | }
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184 | }
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185 | rv = SSL_CONF_CTX_finish(cctx);
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186 | err:
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187 | SSL_CONF_CTX_free(cctx);
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188 | return rv <= 0 ? 0 : 1;
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189 | }
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190 |
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191 | int SSL_config(SSL *s, const char *name)
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192 | {
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193 | return ssl_do_config(s, NULL, name);
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194 | }
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195 |
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196 | int SSL_CTX_config(SSL_CTX *ctx, const char *name)
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197 | {
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198 | return ssl_do_config(NULL, ctx, name);
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199 | }
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