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+.\" -*- mode: troff; coding: utf-8 -*-
+.\" Automatically generated by Pod::Man 5.0102 (Pod::Simple 3.45)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
+.ie n \{\
+. ds C` ""
+. ds C' ""
+'br\}
+.el\{\
+. ds C`
+. ds C'
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
+.de IX
+..
+.nr rF 0
+.if \n(.g .if rF .nr rF 1
+.if (\n(rF:(\n(.g==0)) \{\
+. if \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. if !\nF==2 \{\
+. nr % 0
+. nr F 2
+. \}
+. \}
+.\}
+.rr rF
+.\" ========================================================================
+.\"
+.IX Title "SSL_CTX_CONFIG 3ossl"
+.TH SSL_CTX_CONFIG 3ossl 2025-09-30 3.5.4 OpenSSL
+.\" For nroff, turn off justification. 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 \fBSSL_CTX\fR or
+\&\fBSSL\fR structure using the configuration \fBname\fR.
+.PP
+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 "config.cnf" 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"
+\&\fBssl\fR\|(7),
+\&\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\-2020 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+Licensed under the Apache License 2.0 (the "License"). You may not use
+this file except in compliance with the License. You can obtain a copy
+in the file LICENSE in the source distribution or at
+<https://www.openssl.org/source/license.html>.