1/*
2 * Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 err = 1;
28    unsigned int flags;
29    const SSL_METHOD *meth;
30    const SSL_CONF_CMD *cmds;
31    OSSL_LIB_CTX *prev_libctx = NULL;
32    OSSL_LIB_CTX *libctx = NULL;
33
34    if (s == NULL && ctx == NULL) {
35        ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_NULL_PARAMETER);
36        goto err;
37    }
38
39    if (name == NULL && system)
40        name = "system_default";
41    if (!conf_ssl_name_find(name, &idx)) {
42        if (!system)
43            ERR_raise_data(ERR_LIB_SSL, SSL_R_INVALID_CONFIGURATION_NAME,
44                           "name=%s", name);
45        goto err;
46    }
47    cmds = conf_ssl_get(idx, &name, &cmd_count);
48    cctx = SSL_CONF_CTX_new();
49    if (cctx == NULL)
50        goto err;
51    flags = SSL_CONF_FLAG_FILE;
52    if (!system)
53        flags |= SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_REQUIRE_PRIVATE;
54    if (s != NULL) {
55        meth = s->method;
56        SSL_CONF_CTX_set_ssl(cctx, s);
57        libctx = s->ctx->libctx;
58    } else {
59        meth = ctx->method;
60        SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
61        libctx = ctx->libctx;
62    }
63    if (meth->ssl_accept != ssl_undefined_function)
64        flags |= SSL_CONF_FLAG_SERVER;
65    if (meth->ssl_connect != ssl_undefined_function)
66        flags |= SSL_CONF_FLAG_CLIENT;
67    SSL_CONF_CTX_set_flags(cctx, flags);
68    prev_libctx = OSSL_LIB_CTX_set0_default(libctx);
69    err = 0;
70    for (i = 0; i < cmd_count; i++) {
71        char *cmdstr, *arg;
72        int rv;
73
74        conf_ssl_get_cmd(cmds, i, &cmdstr, &arg);
75        rv = SSL_CONF_cmd(cctx, cmdstr, arg);
76        if (rv <= 0)
77            ++err;
78    }
79    if (!SSL_CONF_CTX_finish(cctx))
80        ++err;
81 err:
82    OSSL_LIB_CTX_set0_default(prev_libctx);
83    SSL_CONF_CTX_free(cctx);
84    return err == 0;
85}
86
87int SSL_config(SSL *s, const char *name)
88{
89    return ssl_do_config(s, NULL, name, 0);
90}
91
92int SSL_CTX_config(SSL_CTX *ctx, const char *name)
93{
94    return ssl_do_config(NULL, ctx, name, 0);
95}
96
97void ssl_ctx_system_config(SSL_CTX *ctx)
98{
99    ssl_do_config(NULL, ctx, NULL, 1);
100}
101