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SSL_CTX_config.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SSL_CTX_config, SSL_config \- configure SSL_CTX or SSL structure .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/ssl.h> \& \& int SSL_CTX_config(SSL_CTX *ctx, const char *name); \& int SSL_config(SSL *s, const char *name); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" The functions \fBSSL_CTX_config()\fR and \fBSSL_config()\fR configure an \fB\s-1SSL_CTX\s0\fR or \&\fB\s-1SSL\s0\fR structure using the configuration \fBname\fR. .SH "NOTES" .IX Header "NOTES" By calling \fBSSL_CTX_config()\fR or \fBSSL_config()\fR an application can perform many complex tasks based on the contents of the configuration file: greatly simplifying application configuration code. A degree of future proofing can also be achieved: an application can support configuration features in newer versions of OpenSSL automatically. .PP A configuration file must have been previously loaded, for example using \&\fBCONF_modules_load_file()\fR. See \fBconfig\fR\|(5) for details of the configuration file syntax. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBSSL_CTX_config()\fR and \fBSSL_config()\fR return 1 for success or 0 if an error occurred. .SH "EXAMPLES" .IX Header "EXAMPLES" If the file \*(L"config.cnf\*(R" contains the following: .PP .Vb 1 \& testapp = test_sect \& \& [test_sect] \& # list of configuration modules \& \& ssl_conf = ssl_sect \& \& [ssl_sect] \& server = server_section \& \& [server_section] \& RSA.Certificate = server\-rsa.pem \& ECDSA.Certificate = server\-ecdsa.pem \& Ciphers = ALL:!RC4 .Ve .PP An application could call: .PP .Vb 4 \& if (CONF_modules_load_file("config.cnf", "testapp", 0) <= 0) { \& fprintf(stderr, "Error processing config file\en"); \& goto err; \& } \& \& ctx = SSL_CTX_new(TLS_server_method()); \& \& if (SSL_CTX_config(ctx, "server") == 0) { \& fprintf(stderr, "Error configuring server.\en"); \& goto err; \& } .Ve .PP In this example two certificates and the cipher list are configured without the need for any additional application code. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBconfig\fR\|(5), \&\fBSSL_CONF_cmd\fR\|(3), \&\fBCONF_modules_load_file\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" The \fBSSL_CTX_config()\fR and \fBSSL_config()\fR functions were added in OpenSSL 1.1.0. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2015\-2019 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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