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<h1>Licence</h1>
<p>OpenConnect in publshed under the GNU Lesser Public License, v2.1. The full text of the licence is
as follows:</p>

<table border="1"><tr><td>
<h2><a id="SEC1">GNU LESSER GENERAL PUBLIC LICENSE</a></h2>
<p>
Version 2.1, February 1999
</p>

<pre>
Copyright (C) 1991, 1999 Free Software Foundation, Inc.
51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.

[This is the first released version of the Lesser GPL.  It also counts
 as the successor of the GNU Library Public License, version 2, hence
 the version number 2.1.]
</pre>


<h3><a id="SEC2">Preamble</a></h3>

<p>
  The licenses for most software are designed to take away your
freedom to share and change it.  By contrast, the GNU General Public
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  This license, the Lesser General Public License, applies to some
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<h3><a id="SEC3">TERMS AND CONDITIONS FOR COPYING,
DISTRIBUTION AND MODIFICATION</a></h3>


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<h3>END OF TERMS AND CONDITIONS</h3>

<h3><a id="SEC4">How to Apply These Terms to Your New
Libraries</a></h3>
<p>
  If you develop a new library, and you want it to be of the greatest
possible use to the public, we recommend making it free software that
everyone can redistribute and change.  You can do so by permitting
redistribution under these terms (or, alternatively, under the terms of the
ordinary General Public License).
</p>
<p>
  To apply these terms, attach the following notices to the library.  It is
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"copyright" line and a pointer to where the full notice is found.
</p>

<pre>
<var>one line to give the library's name and an idea of what it does.</var>
Copyright (C) <var>year</var>  <var>name of author</var>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
</pre>

<p>
Also add information on how to contact you by electronic and paper mail.
</p>
<p>
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the library, if
necessary.  Here is a sample; alter the names:
</p>

<pre>
Yoyodyne, Inc., hereby disclaims all copyright interest in
the library `Frob' (a library for tweaking knobs) written
by James Random Hacker.

<var>signature of Ty Coon</var>, 1 April 1990
Ty Coon, President of Vice
</pre>

<p>
That's all there is to it!</p>
</td></tr></table>

<h1>Additional licences</h1>

<p>In addition to the bulk of OpenConnect being under the LGPLv2.1, some sections were
incorporated from other works making use of the 3-clause BSD licence, which requires
the following information to be available as part of the documentation:</p>

<h2>Windows socketpair implementation</h2>
<p>The socketpair implementation used for communication with the OpenConnect library
under Windows, used with permission from
<a href="https://github.com/ncm/selectable-socketpair">https://github.com/ncm/selectable-socketpair</a>:</p>

<table border="1"><tr><td>
<pre>
Copyright 2007, 2010 by Nathan C. Myers &lt;ncm@cantrip.org&gt;
Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

    Redistributions of source code must retain the above copyright notice, this
    list of conditions and the following disclaimer.
    
    Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.

    The name of the author must not be used to endorse or promote products derived 
    from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
</pre>
</td></tr></table>

<h2>GnuTLS TPMv2.0 support</h2>
<p>Sections of TPMv2.0 support used with permission from <a href="https://github.com/tpm2-software/tpm2-tss-engine">tpm2-tss-engine</a>:</p>
<table border="1"><tr><td>
<pre>
Copyright 2017-2018, Fraunhofer SIT sponsored by Infineon Technologies AG
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.

3. Neither the name of tpm2-tss-engine nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
THE POSSIBILITY OF SUCH DAMAGE.
</pre>
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