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/*
* Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (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 <openssl/conf.h>
#include <openssl/ssl.h>
#include "ssl_locl.h"
/* SSL library configuration module. */
struct ssl_conf_name {
/* Name of this set of commands */
char *name;
/* List of commands */
struct ssl_conf_cmd *cmds;
/* Number of commands */
size_t cmd_count;
};
struct ssl_conf_cmd {
/* Command */
char *cmd;
/* Argument */
char *arg;
};
static struct ssl_conf_name *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 *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)
SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_SECTION_NOT_FOUND);
else
SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_SECTION_EMPTY);
ERR_add_error_data(2, "section=", ssl_conf_section);
goto err;
}
cnt = sk_CONF_VALUE_num(cmd_lists);
ssl_names = OPENSSL_zalloc(sizeof(*ssl_names) * cnt);
ssl_names_count = cnt;
for (i = 0; i < ssl_names_count; i++) {
struct ssl_conf_name *ssl_name = ssl_names + i;
CONF_VALUE *sect = sk_CONF_VALUE_value(cmd_lists, i);
STACK_OF(CONF_VALUE) *cmds = NCONF_get_section(cnf, sect->value);
if (sk_CONF_VALUE_num(cmds) <= 0) {
if (cmds == NULL)
SSLerr(SSL_F_SSL_MODULE_INIT,
SSL_R_SSL_COMMAND_SECTION_NOT_FOUND);
else
SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_COMMAND_SECTION_EMPTY);
ERR_add_error_data(4, "name=", sect->name, ", value=", sect->value);
goto err;
}
ssl_name->name = BUF_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));
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, j);
struct ssl_conf_cmd *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 = BUF_strdup(name);
cmd->arg = BUF_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;
}
void SSL_add_ssl_module(void)
{
CONF_module_add("ssl_conf", ssl_module_init, ssl_module_free);
}
static const struct ssl_conf_name *ssl_name_find(const char *name)
{
size_t i;
const struct ssl_conf_name *nm;
if (name == NULL)
return NULL;
for (i = 0, nm = ssl_names; i < ssl_names_count; i++, nm++) {
if (strcmp(nm->name, name) == 0)
return nm;
}
return NULL;
}
static int ssl_do_config(SSL *s, SSL_CTX *ctx, const char *name)
{
SSL_CONF_CTX *cctx = NULL;
size_t i;
int rv = 0;
unsigned int flags;
const SSL_METHOD *meth;
const struct ssl_conf_name *nm;
struct ssl_conf_cmd *cmd;
if (s == NULL && ctx == NULL) {
SSLerr(SSL_F_SSL_DO_CONFIG, ERR_R_PASSED_NULL_PARAMETER);
goto err;
}
nm = ssl_name_find(name);
if (nm == NULL) {
SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_INVALID_CONFIGURATION_NAME);
ERR_add_error_data(2, "name=", name);
goto err;
}
cctx = SSL_CONF_CTX_new();
if (cctx == NULL)
goto err;
flags = SSL_CONF_FLAG_FILE;
flags |= SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_REQUIRE_PRIVATE;
if (s != NULL) {
meth = s->method;
SSL_CONF_CTX_set_ssl(cctx, s);
} else {
meth = ctx->method;
SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
}
if (meth->ssl_accept != ssl_undefined_function)
flags |= SSL_CONF_FLAG_SERVER;
if (meth->ssl_connect != ssl_undefined_function)
flags |= SSL_CONF_FLAG_CLIENT;
SSL_CONF_CTX_set_flags(cctx, flags);
for (i = 0, cmd = nm->cmds; i < nm->cmd_count; i++, cmd++) {
rv = SSL_CONF_cmd(cctx, cmd->cmd, cmd->arg);
if (rv <= 0) {
if (rv == -2)
SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_UNKNOWN_COMMAND);
else
SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_BAD_VALUE);
ERR_add_error_data(6, "section=", name, ", cmd=", cmd->cmd,
", arg=", cmd->arg);
goto err;
}
}
rv = SSL_CONF_CTX_finish(cctx);
err:
SSL_CONF_CTX_free(cctx);
return rv <= 0 ? 0 : 1;
}
int SSL_config(SSL *s, const char *name)
{
return ssl_do_config(s, NULL, name);
}
int SSL_CTX_config(SSL_CTX *ctx, const char *name)
{
return ssl_do_config(NULL, ctx, name);
}
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