[331] | 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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