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 19By calling SSL_CTX_config() or SSL_config() an application can perform many 20complex tasks based on the contents of the configuration file: greatly 21simplifying application configuration code. A degree of future proofing 22can also be achieved: an application can support configuration features 23in newer versions of OpenSSL automatically. 24 25A configuration file must have been previously loaded, for example using 26CONF_modules_load_file(). See L<config(5)> for details of the configuration 27file syntax. 28 29=head1 RETURN VALUES 30 31SSL_CTX_config() and SSL_config() return 1 for success or 0 if an error 32occurred. 33 34=head1 EXAMPLES 35 36If the file "config.cnf" contains the following: 37 38 testapp = test_sect 39 40 [test_sect] 41 # list of configuration modules 42 43 ssl_conf = ssl_sect 44 45 [ssl_sect] 46 server = server_section 47 48 [server_section] 49 RSA.Certificate = server-rsa.pem 50 ECDSA.Certificate = server-ecdsa.pem 51 Ciphers = ALL:!RC4 52 53An application could call: 54 55 if (CONF_modules_load_file("config.cnf", "testapp", 0) <= 0) { 56 fprintf(stderr, "Error processing config file\n"); 57 goto err; 58 } 59 60 ctx = SSL_CTX_new(TLS_server_method()); 61 62 if (SSL_CTX_config(ctx, "server") == 0) { 63 fprintf(stderr, "Error configuring server.\n"); 64 goto err; 65 } 66 67In this example two certificates and the cipher list are configured without 68the need for any additional application code. 69 70=head1 SEE ALSO 71 72L<ssl(7)>, 73L<config(5)>, 74L<SSL_CONF_cmd(3)>, 75L<CONF_modules_load_file(3)> 76 77=head1 HISTORY 78 79The SSL_CTX_config() and SSL_config() functions were added in OpenSSL 1.1.0. 80 81=head1 COPYRIGHT 82 83Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved. 84 85Licensed under the Apache License 2.0 (the "License"). You may not use 86this file except in compliance with the License. You can obtain a copy 87in the file LICENSE in the source distribution or at 88L<https://www.openssl.org/source/license.html>. 89 90=cut 91