secnet - flexible VPN software ============================== secnet is Copyright 1995-2003 Stephen Early Copyright 2002-2023 Ian Jackson Copyright 1991 Massachusetts Institute of Technology Copyright 1998 Ross Anderson, Eli Biham, Lars Knudsen Copyright 1993 Colin Plumb Copyright 1998 James H. Brown, Steve Reid Copyright 1998 Miquel van Smoorenburg, Ian Murdock Copyright 2000 Vincent Rijmen, Antoon Bosselaers, Paulo Barreto Copyright 2001 Joey Hess Copyright 2000-2006 Joachim Henkea Copyright 2012-2016 Adrien Béraud Copyright 2015 Guillaume Jacquenot Copyright 2016 SunDwarf aka eyesismine Copyright 2001 Saul Kravitz Copyright 2004 Fabrice Bellard Copyright 2002 Guido Draheim Copyright 2005-2010 Free Software Foundation, Inc. Copyright 1995-2001 Jonathan Amery Copyright 1995-2003 Peter Benie Copyright 2011 Richard Kettlewell Copyright 2012 Matthew Vernon Copyright 2013-2019 Mark Wooding Copyright 1995-2013 Simon Tatham Copyright 2012,2013 "Omnifarious" and "btel" on Stackoverflow GPLv3+ ====== secnet is distributed under the terms of the GNU General Public License, version 3 or later. secnet 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 General Public License for more details. The file COPYING in the source tree contains a copy of the GNU GPL v3. A copy of this licence can be found on Debian systems (and derivatives) in /usr/share/common-licenses/GPL-3. Some files contain a notice with the abbreviated form: SPDX-License-Identifier: GPL-3.0-or-later As is conventional, this should be read as a licence grant. Some included libraries contain CC-BY-SA 4.0 code, which is not necessarily compatibile with future GPL versions, so the effective licence for a built and distributed secnet package is GPLv3 only. Contributing ============ Contributions to secnet are accepted based on the git commit Signed-off-by convention, by which the contributors' certify their contributions according to the Developer Certificate of Origin version 1.1 - see the file DEVELOPER-CERTIFICATE. In accordance with the Developer Certificate of Origin, if you make a contribution to one of the incorporated works with a more liberal licence, you will be taken to have made your contribution under that more liberal licence. If you create a new file please be sure to add an appropriate licence header. In the main parts of secnet this should be something like: * This file is part of secnet. * See LICENCE and CREDITS for full list of copyright holders. * SPDX-License-Identifier: GPL-3.0-or-later * There is NO WARRANTY. Incorporated works ================== Some of the source code has more liberal licences, all of which are GPLv3-compatible, and potentially GPLv3+-compatible. These portions can be used, distributed, and modified, separately, under the more liberal licence. But when they are used or distributed as part of secnet, the GPL applies to the combination. ac_prog_cc_no_writeable_strings.m4 ----------------------------------- This is a version of ax_cflags_no_writable_strings.m4 which is now in the Autoconf Archive, where it has this permission notice: Copyright (c) 2008 Guido U. Draheim This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . As a special exception, the respective Autoconf Macro's copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts, even though portions of the text of the Macro appear in them. The GNU General Public License (GPL) does govern all other use of the material that constitutes the Autoconf Macro. This special exception to the GPL applies to versions of the Autoconf Macro released by the Autoconf Archive. When you make and distribute a modified version of the Autoconf Macro, you may extend this special exception to the GPL to apply to your modified version as well. argparseactionnoyes.py ---------------------- Copyright 2012 "Omnifarious" (a user on StackOverFlow) Copyright 2013 "btel" (a user on StackOverFlow) https://stackoverflow.com/questions/9234258/in-python-argparse-is-it-possible-to-have-paired-no-something-something-arg/20422915#20422915 CC-BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0/legalcode by virtue of https://stackoverflow.com/legal/terms-of-service#licensing which says everything is CC-BY-SA and has a link to v4.0 (And which is therefore compatible with secnet's GPLv3) all retrieved 4.11.2019 and rechecked 12.11.2022 aes.[ch] -------- Copyright 2000 Vincent Rijmen, Antoon Bosselaers, Paulo Barreto Copyright 2004 Fabrice Bellard Copyright 2013 Ian Jackson Original licence: This code is hereby placed in the public domain. THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''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 AUTHORS 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. base91-c/ --------- Copyright (c) 2000-2006 Joachim Henke 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. - Neither the name of Joachim Henke nor the names of his 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 OWNER 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. base91-python/ --------------- Copyright (c) 2012 Adrien Beraud Copyright (c) 2015 Guillaume Jacquenot 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. * Neither the name of Adrien Beraud, Wisdom Vibes Pte. Ltd., 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 OWNER 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. configure --------- This is autogenerated from various other inputs, including FSF code in utotools, regarding which the FSF say this: Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc. This configure script is free software; the Free Software Foundation gives unlimited permission to copy, distribute and modify it. However, in fact, the script is GPLv3+ because it contains pieces derived from secnet's aclocal.m4, etc. debian/ ------- debian/init is from an original init script example by Miquel van Smoorenburg and Ian Murdock. Modified by Richard Kettlewell. debian/rules was once from an example from Joey Hess and is now (after most of it was deleted) probably entirely the work of Ian Jackson. The remainder of debian/ is by the authors of Secnet (with possible future changes made by Debian contributors). install-sh ---------- Copyright 1991 by the Massachusetts Institute of Technology Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of M.I.T. not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. M.I.T. makes no representations about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty. md5.[ch] -------- Authored by Colin Plumb in 1993. Public domain statement: This code implements the MD5 message-digest algorithm. The algorithm is due to Ron Rivest. This code was written by Colin Plumb in 1993, no copyright is claimed. This code is in the public domain; do with it what you wish. I interpet this as a blanket permision. serpent.c, serpentsboxes.h --------------------------- Authored by Ross Anderson, Eli Biham, Lars Knudsen. Quoting the Serpent web page: Serpent is now completely in the public domain, and we impose no restrictions on its use. This was announced on the 21st August at the First AES Candidate Conference. The optimised implementations in the submission package are now under the General Public License (GPL), although some comments in the code still say otherwise. You are welcome to use Serpent for any application. If you do use it, we would appreciate it if you would let us know! https://www.cl.cam.ac.uk/~rja14/serpent.html I have indeed corresponded with Ross Anderson about the use of Serpent in secnet, and have updated the source comments to reflect the licence upgrade. sha1.c ------ Authored by Steve Reid and modified by James H. Brown, Saul Kravitz, and Ian Jackson. 100% Public Domain I interpet this as a blanket permision. sha512.[ch] ----------- Copyright (C) 2005, 2006, 2008, 2009, 2010 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. Written by David Madore, considerably copypasting from Scott G. Miller's sha1.c subdirmk/ --------- Copyright 2019-2020 Ian Jackson Copyright 2019 Mark Wooding subdirmk and its example is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library as the file LGPL-2. If not, see https://www.gnu.org/. A copy of this licence can be found on Debian systems (and derivatives) in /usr/share/common-licenses/LGPL-3. u64.h ----- uint64_t-like operations that work even on hosts lacking uint64_t Copyright (C) 2006, 2009, 2010 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. Written by Paul Eggert.