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=pod
=head1 NAME
SSL_CTX_use_serverinfo, SSL_CTX_use_serverinfo_file - use serverinfo extension
=head1 SYNOPSIS
#include <openssl/ssl.h>
int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo,
size_t serverinfo_length);
int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file);
=head1 DESCRIPTION
These functions load "serverinfo" TLS ServerHello Extensions into the SSL_CTX.
A "serverinfo" extension is returned in response to an empty ClientHello
Extension.
SSL_CTX_use_serverinfo() loads one or more serverinfo extensions from
a byte array into B<ctx>. The extensions must be concatenated into a
sequence of bytes. Each extension must consist of a 2-byte Extension Type,
a 2-byte length, and then length bytes of extension_data.
SSL_CTX_use_serverinfo_file() loads one or more serverinfo extensions from
B<file> into B<ctx>. The extensions must be in PEM format. Each extension
must consist of a 2-byte Extension Type, a 2-byte length, and then length
bytes of extension_data. Each PEM extension name must begin with the phrase
"BEGIN SERVERINFO FOR ".
If more than one certificate (RSA/DSA) is installed using
SSL_CTX_use_certificate(), the serverinfo extension will be loaded into the
last certificate installed. If e.g. the last item was a RSA certificate, the
loaded serverinfo extension data will be loaded for that certificate. To
use the serverinfo extension for multiple certificates,
SSL_CTX_use_serverinfo() needs to be called multiple times, once B<after>
each time a certificate is loaded.
=head1 RETURN VALUES
On success, the functions return 1.
On failure, the functions return 0. Check out the error stack to find out
the reason.
=head1 COPYRIGHT
Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (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
L<https://www.openssl.org/source/license.html>.
=cut
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