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/*
* Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <string.h>
#include <openssl/conf.h>
#include <openssl/err.h>
#include "internal/sslconf.h"
#include "conf_local.h"
DEFINE_STACK_OF(CONF_VALUE)
/*
* SSL library configuration module placeholder. We load it here but defer
* all decisions about its contents to libssl.
*/
struct ssl_conf_name_st {
/* Name of this set of commands */
char *name;
/* List of commands */
SSL_CONF_CMD *cmds;
/* Number of commands */
size_t cmd_count;
};
struct ssl_conf_cmd_st {
/* Command */
char *cmd;
/* Argument */
char *arg;
};
static struct ssl_conf_name_st *ssl_names;
static size_t ssl_names_count;
static void ssl_module_free(CONF_IMODULE *md)
{
size_t i, j;
if (ssl_names == NULL)
return;
for (i = 0; i < ssl_names_count; i++) {
struct ssl_conf_name_st *tname = ssl_names + i;
OPENSSL_free(tname->name);
for (j = 0; j < tname->cmd_count; j++) {
OPENSSL_free(tname->cmds[j].cmd);
OPENSSL_free(tname->cmds[j].arg);
}
OPENSSL_free(tname->cmds);
}
OPENSSL_free(ssl_names);
ssl_names = NULL;
ssl_names_count = 0;
}
static int ssl_module_init(CONF_IMODULE *md, const CONF *cnf)
{
size_t i, j, cnt;
int rv = 0;
const char *ssl_conf_section;
STACK_OF(CONF_VALUE) *cmd_lists;
ssl_conf_section = CONF_imodule_get_value(md);
cmd_lists = NCONF_get_section(cnf, ssl_conf_section);
if (sk_CONF_VALUE_num(cmd_lists) <= 0) {
if (cmd_lists == NULL)
CONFerr(CONF_F_SSL_MODULE_INIT, CONF_R_SSL_SECTION_NOT_FOUND);
else
CONFerr(CONF_F_SSL_MODULE_INIT, CONF_R_SSL_SECTION_EMPTY);
ERR_add_error_data(2, "section=", ssl_conf_section);
goto err;
}
cnt = sk_CONF_VALUE_num(cmd_lists);
ssl_module_free(md);
ssl_names = OPENSSL_zalloc(sizeof(*ssl_names) * cnt);
if (ssl_names == NULL)
goto err;
ssl_names_count = cnt;
for (i = 0; i < ssl_names_count; i++) {
struct ssl_conf_name_st *ssl_name = ssl_names + i;
CONF_VALUE *sect = sk_CONF_VALUE_value(cmd_lists, (int)i);
STACK_OF(CONF_VALUE) *cmds = NCONF_get_section(cnf, sect->value);
if (sk_CONF_VALUE_num(cmds) <= 0) {
if (cmds == NULL)
CONFerr(CONF_F_SSL_MODULE_INIT,
CONF_R_SSL_COMMAND_SECTION_NOT_FOUND);
else
CONFerr(CONF_F_SSL_MODULE_INIT,
CONF_R_SSL_COMMAND_SECTION_EMPTY);
ERR_add_error_data(4, "name=", sect->name, ", value=", sect->value);
goto err;
}
ssl_name->name = OPENSSL_strdup(sect->name);
if (ssl_name->name == NULL)
goto err;
cnt = sk_CONF_VALUE_num(cmds);
ssl_name->cmds = OPENSSL_zalloc(cnt * sizeof(struct ssl_conf_cmd_st));
if (ssl_name->cmds == NULL)
goto err;
ssl_name->cmd_count = cnt;
for (j = 0; j < cnt; j++) {
const char *name;
CONF_VALUE *cmd_conf = sk_CONF_VALUE_value(cmds, (int)j);
struct ssl_conf_cmd_st *cmd = ssl_name->cmds + j;
/* Skip any initial dot in name */
name = strchr(cmd_conf->name, '.');
if (name != NULL)
name++;
else
name = cmd_conf->name;
cmd->cmd = OPENSSL_strdup(name);
cmd->arg = OPENSSL_strdup(cmd_conf->value);
if (cmd->cmd == NULL || cmd->arg == NULL)
goto err;
}
}
rv = 1;
err:
if (rv == 0)
ssl_module_free(md);
return rv;
}
/*
* Returns the set of commands with index |idx| previously searched for via
* conf_ssl_name_find. Also stores the name of the set of commands in |*name|
* and the number of commands in the set in |*cnt|.
*/
const SSL_CONF_CMD *conf_ssl_get(size_t idx, const char **name, size_t *cnt)
{
*name = ssl_names[idx].name;
*cnt = ssl_names[idx].cmd_count;
return ssl_names[idx].cmds;
}
/*
* Search for the named set of commands given in |name|. On success return the
* index for the command set in |*idx|.
* Returns 1 on success or 0 on failure.
*/
int conf_ssl_name_find(const char *name, size_t *idx)
{
size_t i;
const struct ssl_conf_name_st *nm;
if (name == NULL)
return 0;
for (i = 0, nm = ssl_names; i < ssl_names_count; i++, nm++) {
if (strcmp(nm->name, name) == 0) {
*idx = i;
return 1;
}
}
return 0;
}
/*
* Given a command set |cmd|, return details on the command at index |idx| which
* must be less than the number of commands in the set (as returned by
* conf_ssl_get). The name of the command will be returned in |*cmdstr| and the
* argument is returned in |*arg|.
*/
void conf_ssl_get_cmd(const SSL_CONF_CMD *cmd, size_t idx, char **cmdstr,
char **arg)
{
*cmdstr = cmd[idx].cmd;
*arg = cmd[idx].arg;
}
void conf_add_ssl_module(void)
{
CONF_module_add("ssl_conf", ssl_module_init, ssl_module_free);
}
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