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 <openssl/conf.h>
12#include <openssl/ssl.h>
13#include "ssl_local.h"
14#include "internal/sslconf.h"
15
16/* SSL library configuration module. */
17
18void SSL_add_ssl_module(void)
19{
20    /* Do nothing. This will be added automatically by libcrypto */
21}
22
23static int ssl_do_config(SSL *s, SSL_CTX *ctx, const char *name, int system)
24{
25    SSL_CONF_CTX *cctx = NULL;
26    size_t i, idx, cmd_count;
27    int rv = 0;
28    unsigned int flags;
29    const SSL_METHOD *meth;
30    const SSL_CONF_CMD *cmds;
31
32    if (s == NULL && ctx == NULL) {
33        SSLerr(SSL_F_SSL_DO_CONFIG, ERR_R_PASSED_NULL_PARAMETER);
34        goto err;
35    }
36
37    if (name == NULL && system)
38        name = "system_default";
39    if (!conf_ssl_name_find(name, &idx)) {
40        if (!system) {
41            SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_INVALID_CONFIGURATION_NAME);
42            ERR_add_error_data(2, "name=", name);
43        }
44        goto err;
45    }
46    cmds = conf_ssl_get(idx, &name, &cmd_count);
47    cctx = SSL_CONF_CTX_new();
48    if (cctx == NULL)
49        goto err;
50    flags = SSL_CONF_FLAG_FILE;
51    if (!system)
52        flags |= SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_REQUIRE_PRIVATE;
53    if (s != NULL) {
54        meth = s->method;
55        SSL_CONF_CTX_set_ssl(cctx, s);
56    } else {
57        meth = ctx->method;
58        SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
59    }
60    if (meth->ssl_accept != ssl_undefined_function)
61        flags |= SSL_CONF_FLAG_SERVER;
62    if (meth->ssl_connect != ssl_undefined_function)
63        flags |= SSL_CONF_FLAG_CLIENT;
64    SSL_CONF_CTX_set_flags(cctx, flags);
65    for (i = 0; i < cmd_count; i++) {
66        char *cmdstr, *arg;
67
68        conf_ssl_get_cmd(cmds, i, &cmdstr, &arg);
69        rv = SSL_CONF_cmd(cctx, cmdstr, arg);
70        if (rv <= 0) {
71            if (rv == -2)
72                SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_UNKNOWN_COMMAND);
73            else
74                SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_BAD_VALUE);
75            ERR_add_error_data(6, "section=", name, ", cmd=", cmdstr,
76                               ", arg=", arg);
77            goto err;
78        }
79    }
80    rv = SSL_CONF_CTX_finish(cctx);
81 err:
82    SSL_CONF_CTX_free(cctx);
83    return rv <= 0 ? 0 : 1;
84}
85
86int SSL_config(SSL *s, const char *name)
87{
88    return ssl_do_config(s, NULL, name, 0);
89}
90
91int SSL_CTX_config(SSL_CTX *ctx, const char *name)
92{
93    return ssl_do_config(NULL, ctx, name, 0);
94}
95
96void ssl_ctx_system_config(SSL_CTX *ctx)
97{
98    ssl_do_config(NULL, ctx, NULL, 1);
99}
100