1 /* 2 * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include <string.h> 12 #include <openssl/conf.h> 13 #include <openssl/err.h> 14 #include "internal/sslconf.h" 15 #include "conf_lcl.h" 16 17 /* 18 * SSL library configuration module placeholder. We load it here but defer 19 * all decisions about its contents to libssl. 20 */ 21 22 struct ssl_conf_name_st { 23 /* Name of this set of commands */ 24 char *name; 25 /* List of commands */ 26 SSL_CONF_CMD *cmds; 27 /* Number of commands */ 28 size_t cmd_count; 29 }; 30 31 struct ssl_conf_cmd_st { 32 /* Command */ 33 char *cmd; 34 /* Argument */ 35 char *arg; 36 }; 37 38 static struct ssl_conf_name_st *ssl_names; 39 static size_t ssl_names_count; 40 41 static void ssl_module_free(CONF_IMODULE *md) 42 { 43 size_t i, j; 44 if (ssl_names == NULL) 45 return; 46 for (i = 0; i < ssl_names_count; i++) { 47 struct ssl_conf_name_st *tname = ssl_names + i; 48 49 OPENSSL_free(tname->name); 50 for (j = 0; j < tname->cmd_count; j++) { 51 OPENSSL_free(tname->cmds[j].cmd); 52 OPENSSL_free(tname->cmds[j].arg); 53 } 54 OPENSSL_free(tname->cmds); 55 } 56 OPENSSL_free(ssl_names); 57 ssl_names = NULL; 58 ssl_names_count = 0; 59 } 60 61 static int ssl_module_init(CONF_IMODULE *md, const CONF *cnf) 62 { 63 size_t i, j, cnt; 64 int rv = 0; 65 const char *ssl_conf_section; 66 STACK_OF(CONF_VALUE) *cmd_lists; 67 68 ssl_conf_section = CONF_imodule_get_value(md); 69 cmd_lists = NCONF_get_section(cnf, ssl_conf_section); 70 if (sk_CONF_VALUE_num(cmd_lists) <= 0) { 71 if (cmd_lists == NULL) 72 CONFerr(CONF_F_SSL_MODULE_INIT, CONF_R_SSL_SECTION_NOT_FOUND); 73 else 74 CONFerr(CONF_F_SSL_MODULE_INIT, CONF_R_SSL_SECTION_EMPTY); 75 ERR_add_error_data(2, "section=", ssl_conf_section); 76 goto err; 77 } 78 cnt = sk_CONF_VALUE_num(cmd_lists); 79 ssl_module_free(md); 80 ssl_names = OPENSSL_zalloc(sizeof(*ssl_names) * cnt); 81 ssl_names_count = cnt; 82 for (i = 0; i < ssl_names_count; i++) { 83 struct ssl_conf_name_st *ssl_name = ssl_names + i; 84 CONF_VALUE *sect = sk_CONF_VALUE_value(cmd_lists, (int)i); 85 STACK_OF(CONF_VALUE) *cmds = NCONF_get_section(cnf, sect->value); 86 87 if (sk_CONF_VALUE_num(cmds) <= 0) { 88 if (cmds == NULL) 89 CONFerr(CONF_F_SSL_MODULE_INIT, 90 CONF_R_SSL_COMMAND_SECTION_NOT_FOUND); 91 else 92 CONFerr(CONF_F_SSL_MODULE_INIT, 93 CONF_R_SSL_COMMAND_SECTION_EMPTY); 94 ERR_add_error_data(4, "name=", sect->name, ", value=", sect->value); 95 goto err; 96 } 97 ssl_name->name = OPENSSL_strdup(sect->name); 98 if (ssl_name->name == NULL) 99 goto err; 100 cnt = sk_CONF_VALUE_num(cmds); 101 ssl_name->cmds = OPENSSL_zalloc(cnt * sizeof(struct ssl_conf_cmd_st)); 102 if (ssl_name->cmds == NULL) 103 goto err; 104 ssl_name->cmd_count = cnt; 105 for (j = 0; j < cnt; j++) { 106 const char *name; 107 CONF_VALUE *cmd_conf = sk_CONF_VALUE_value(cmds, (int)j); 108 struct ssl_conf_cmd_st *cmd = ssl_name->cmds + j; 109 110 /* Skip any initial dot in name */ 111 name = strchr(cmd_conf->name, '.'); 112 if (name != NULL) 113 name++; 114 else 115 name = cmd_conf->name; 116 cmd->cmd = OPENSSL_strdup(name); 117 cmd->arg = OPENSSL_strdup(cmd_conf->value); 118 if (cmd->cmd == NULL || cmd->arg == NULL) 119 goto err; 120 } 121 122 } 123 rv = 1; 124 err: 125 if (rv == 0) 126 ssl_module_free(md); 127 return rv; 128 } 129 130 /* 131 * Returns the set of commands with index |idx| previously searched for via 132 * conf_ssl_name_find. Also stores the name of the set of commands in |*name| 133 * and the number of commands in the set in |*cnt|. 134 */ 135 const SSL_CONF_CMD *conf_ssl_get(size_t idx, const char **name, size_t *cnt) 136 { 137 *name = ssl_names[idx].name; 138 *cnt = ssl_names[idx].cmd_count; 139 return ssl_names[idx].cmds; 140 } 141 142 /* 143 * Search for the named set of commands given in |name|. On success return the 144 * index for the command set in |*idx|. 145 * Returns 1 on success or 0 on failure. 146 */ 147 int conf_ssl_name_find(const char *name, size_t *idx) 148 { 149 size_t i; 150 const struct ssl_conf_name_st *nm; 151 152 if (name == NULL) 153 return 0; 154 for (i = 0, nm = ssl_names; i < ssl_names_count; i++, nm++) { 155 if (strcmp(nm->name, name) == 0) { 156 *idx = i; 157 return 1; 158 } 159 } 160 return 0; 161 } 162 163 /* 164 * Given a command set |cmd|, return details on the command at index |idx| which 165 * must be less than the number of commands in the set (as returned by 166 * conf_ssl_get). The name of the command will be returned in |*cmdstr| and the 167 * argument is returned in |*arg|. 168 */ 169 void conf_ssl_get_cmd(const SSL_CONF_CMD *cmd, size_t idx, char **cmdstr, 170 char **arg) 171 { 172 *cmdstr = cmd[idx].cmd; 173 *arg = cmd[idx].arg; 174 } 175 176 void conf_add_ssl_module(void) 177 { 178 CONF_module_add("ssl_conf", ssl_module_init, ssl_module_free); 179 } 180