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