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+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at http://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_SSL_CTX_FUNCTION 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_SSL_CTX_FUNCTION \- openssl specific callback to do SSL magic
+.SH SYNOPSIS
+.nf
+#include <curl/curl.h>
+
+CURLcode ssl_ctx_callback(CURL *curl, void *ssl_ctx, void *userptr);
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_CTX_FUNCTION,
+                          ssl_ctx_callback);
+.SH DESCRIPTION
+This option only works for libcurl powered by OpenSSL. If libcurl was built
+against another SSL library, this functionality is absent.
+
+Pass a pointer to your callback function, which should match the prototype
+shown above.
+
+This callback function gets called by libcurl just before the initialization
+of a SSL connection after having processed all other SSL related options to
+give a last chance to an application to modify the behaviour of openssl's ssl
+initialization. The \fIsslctx\fP parameter is actually a pointer to an openssl
+\fISSL_CTX\fP. If an error is returned from the callback, no attempt to
+establish a connection is made and the perform operation will return the error
+code.  Set the \fIuserptr\fP argument with the \fICURLOPT_SSL_CTX_DATA(3)\fP
+option.
+
+This function will get called on all new connections made to a server, during
+the SSL negotiation. The SSL_CTX pointer will be a new one every time.
+
+To use this properly, a non-trivial amount of knowledge of the openssl
+libraries is necessary. For example, using this function allows you to use
+openssl callbacks to add additional validation code for certificates, and even
+to change the actual URI of a HTTPS request (example used in the lib509 test
+case).  See also the example section for a replacement of the key, certificate
+and trust file settings.
+.SH DEFAULT
+NULL
+.SH PROTOCOLS
+All TLS based protocols: HTTPS, FTPS, IMAPS, POP3, SMTPS etc.
+.SH EXAMPLE
+TODO
+.SH AVAILABILITY
+Added in 7.11.0. Only supported when built with OpenSSL.
+.SH RETURN VALUE
+Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
+.SH "SEE ALSO"
+.BR CURLOPT_SSL_CTX_DATA "(3), " CURLOPT_SSL_VERIFYPEER "(3), "