1=pod
2
3=head1 NAME
4
5SSL_CTX_config, SSL_config - configure SSL_CTX or SSL structure
6
7=head1 SYNOPSIS
8
9 #include <openssl/ssl.h>
10
11 int SSL_CTX_config(SSL_CTX *ctx, const char *name);
12 int SSL_config(SSL *s, const char *name);
13
14=head1 DESCRIPTION
15
16The functions SSL_CTX_config() and SSL_config() configure an B<SSL_CTX> or
17B<SSL> structure using the configuration B<name>.
18
19=head1 NOTES
20
21By calling SSL_CTX_config() or SSL_config() an application can perform many
22complex tasks based on the contents of the configuration file: greatly
23simplifying application configuration code. A degree of future proofing
24can also be achieved: an application can support configuration features
25in newer versions of OpenSSL automatically.
26
27A configuration file must have been previously loaded, for example using
28CONF_modules_load_file(). See L<config(5)> for details of the configuration
29file syntax.
30
31=head1 RETURN VALUES
32
33SSL_CTX_config() and SSL_config() return 1 for success or 0 if an error
34occurred.
35
36=head1 EXAMPLES
37
38If the file "config.cnf" contains the following:
39
40 testapp = test_sect
41
42 [test_sect]
43 # list of configuration modules
44
45 ssl_conf = ssl_sect
46
47 [ssl_sect]
48 server = server_section
49
50 [server_section]
51 RSA.Certificate = server-rsa.pem
52 ECDSA.Certificate = server-ecdsa.pem
53 Ciphers = ALL:!RC4
54
55An application could call:
56
57 if (CONF_modules_load_file("config.cnf", "testapp", 0) <= 0) {
58     fprintf(stderr, "Error processing config file\n");
59     goto err;
60 }
61
62 ctx = SSL_CTX_new(TLS_server_method());
63
64 if (SSL_CTX_config(ctx, "server") == 0) {
65     fprintf(stderr, "Error configuring server.\n");
66     goto err;
67 }
68
69In this example two certificates and the cipher list are configured without
70the need for any additional application code.
71
72=head1 SEE ALSO
73
74L<config(5)>,
75L<SSL_CONF_cmd(3)>,
76L<CONF_modules_load_file(3)>
77
78=head1 HISTORY
79
80The SSL_CTX_config() and SSL_config() functions were added in OpenSSL 1.1.0.
81
82=head1 COPYRIGHT
83
84Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
85
86Licensed under the OpenSSL license (the "License").  You may not use
87this file except in compliance with the License.  You can obtain a copy
88in the file LICENSE in the source distribution or at
89L<https://www.openssl.org/source/license.html>.
90
91=cut
92