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From dlitz@dlitz.net Sat Apr 18 09:14:20 2009 Date: Sat, 18 Apr 2009 09:14:20 -0400 From: "Dwayne C. Litzenberger" <dlitz@dlitz.net> To: Mark Moraes <moraes@computer.org> Subject: PyCrypto license clarification Message-ID: <20090418131419.GA14494@rivest.dlitz.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline User-Agent: Mutt/1.5.16 (2007-06-11) Status: RO Content-Length: 2635 Hi Mark, I am the new maintainer of the Python Cryptography Toolkit, and I am working on a new release at http://www.pycrypto.org/. People often ask me what license PyCrypto is covered by, if it's GPL-compatible, etc. Right now, I'm not really sure what to tell them. The text in the current LICENSE file (quoted below) is not entirely clear on the point of whether distributing modified versions is allowed. (It says "distribute and use", but not "modify".) =================================================================== Distribute and use freely; there are no restrictions on further dissemination and usage except those imposed by the laws of your country of residence. This software is provided "as is" without warranty of fitness for use or suitability for any purpose, express or implied. Use at your own risk or not at all. =================================================================== Incorporating the code into commercial products is permitted; you do not have to make source available or contribute your changes back (though that would be nice). --amk (www.amk.ca) For the next PyCrypto release, I would like to take steps to move toward a clearer licensing regime. I am asking as many copyright holders as I can find if I can release PyCrypto under something clearer and more standard. Below, I have quoted a public domain dedication that was recommended in _Intellectual Property and Open Source: A Practical Guide to Protecting Code_, by Van Lindberg. I have already contacted A. M. Kuchling, Robey Pointer, Wim Lewis, Jeethu Rao, and Barry Warsaw, and they have all approved the following dedication for their contributions. I understand that you have made contributions to PyCrypto. May I, on your behalf, dedicate to the public domain all your contributions to PyCrypto, with the following notice? ======================================================================= The contents of this file are dedicated to the public domain. To the extent that dedication to the public domain is not available, everyone is granted a worldwide, perpetual, royalty-free, non-exclusive license to exercise all rights associated with the contents of this file for any purpose whatsoever. No rights are reserved. ======================================================================= Regards, - Dwayne -- Dwayne C. Litzenberger <dlitz@dlitz.net> Key-signing key - 19E1 1FE8 B3CF F273 ED17 4A24 928C EC13 39C2 5CF7 From markmoraes@yahoo.com Mon Apr 20 19:25:37 2009 X-Maildir-Dup-Checked: Yes Return-Path: <markmoraes@yahoo.com> X-Original-To: dwon@rivest.dlitz.net Delivered-To: dwon@rivest.dlitz.net Received: from goedel.dlitz.net (unknown [10.159.255.6]) by rivest.dlitz.net (Postfix) with ESMTP id 5D9AE984FDD for <dwon@rivest.dlitz.net>; Mon, 20 Apr 2009 19:25:37 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by goedel.dlitz.net (Postfix) with QMQP id DE41F4025F for <dwon@rivest.dlitz.net>; Mon, 20 Apr 2009 17:25:36 -0600 (CST) Received: (vmailmgr-postfix 7604 invoked by uid 1003); 20 Apr 2009 17:25:36 -0600 Delivered-To: m-dlitz-dlitz@dlitz.net Received-SPF: none (yahoo.com: No applicable sender policy available) receiver=goedel.dlitz.net; identity=mfrom; envelope-from="markmoraes@yahoo.com"; helo=web32405.mail.mud.yahoo.com; client-ip=68.142.207.198 Received: from web32405.mail.mud.yahoo.com (web32405.mail.mud.yahoo.com [68.142.207.198]) by goedel.dlitz.net (Postfix) with SMTP id B5EAF401EE for <dlitz@dlitz.net>; Mon, 20 Apr 2009 17:25:36 -0600 (CST) Received: (qmail 34697 invoked by uid 60001); 20 Apr 2009 23:25:33 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1240269933; bh=OvxqbYnCg7R6tUN3YmlgFURM3CuHh1JeHyXhDzkaThU=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type; b=F2h2bFzpQxyKFZ8BhenniyupGw4Zvlekb9BSk91qKU+51W/TkSGBij5YZIhkLQdkQk0qLz5f4g8dT6bOME3sEY1j10hlx0K0u2UD0yoYTINBCmsdMQRoJ7ph9bmt+p/EJhRpe+FiV6aoLV0FONWiHfGDghPT1dulWXfVTqgB2aU= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type; b=r6RShFF5VzQLg+9tcn1xKuo4Rs4IVvXF6fdqOpQrMyRCxeFooebhuTE35grGqlomOJLwM0+mZwRb6rGkDj763caOAlo8Ect/qlADW5izXfmVQaDchTbTqmpsJBmQnTQs9iZ+InrG+3UIwtUSGfX7fhEWmI9P/HBzxf9Wp4b3jeo=; Message-ID: <551071.34569.qm@web32405.mail.mud.yahoo.com> X-YMail-OSG: FrK8aWMVM1mFJtLpMGbUbCLjbUQC.i.JkIAKUHSFsFn7t9PbtewAewXJ2uhZGCOlGCX6oVnG3u.CgqzAffY4vZSnfTT8wnCkzZNZ_g6k.XUc3ipo_6e.92TXl4p8MxDGAf1tpNF5nXPwcQ7aREs7jGoWWVJYVytp50clsUFSHzf7Zbpa8P1Yoe_xSzf3OAgRSh5fCrbFCC8sHPCuwrL3YhasbtHmkWffteSS.x6gEcBaxf03oz4FeDb5mpJ54g11Xonq8h_TmzX9g84Bin9g_3fJ4WSXm6g6.tohLyfXcUxoz4j036wyWpTKPrWEzIUQaN83Sv_bj_Ghxw-- Received: from [69.124.140.74] by web32405.mail.mud.yahoo.com via HTTP; Mon, 20 Apr 2009 16:25:32 PDT X-Mailer: YahooMailClassic/5.2.15 YahooMailWebService/0.7.289.1 Date: Mon, 20 Apr 2009 16:25:32 -0700 (PDT) From: M Moraes <markmoraes@yahoo.com> Reply-To: moraes@computer.org Subject: Re: PyCrypto license clarification To: "Dwayne C. Litzenberger" <dlitz@dlitz.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Status: RO X-Status: A Content-Length: 3222 Hi Dwayne. Sure, the new license sounds fine for all my contributions to PyCrypto, and thanks for taking it on. My apologies for not responding to your previous e-mail. Regards, Mark. --- On Sat, 4/18/09, Dwayne C. Litzenberger <dlitz@dlitz.net> wrote: > From: Dwayne C. Litzenberger <dlitz@dlitz.net> > Subject: PyCrypto license clarification > To: "Mark Moraes" <moraes@computer.org> > Date: Saturday, April 18, 2009, 9:14 AM > Hi Mark, > > I am the new maintainer of the Python Cryptography Toolkit, > and I am > working on a new release at http://www.pycrypto.org/. > > People often ask me what license PyCrypto is covered by, if > it's > GPL-compatible, etc. Right now, I'm not really sure > what to tell them. > The text in the current LICENSE file (quoted below) is not > entirely clear > on the point of whether distributing modified versions is > allowed. (It > says "distribute and use", but not "modify".) > > > =================================================================== > Distribute and use freely; there are > no restrictions on further > dissemination and usage except those > imposed by the laws of your > country of residence. This > software is provided "as is" without > warranty of fitness for use or > suitability for any purpose, express > or implied. Use at your own risk or > not at all. > > =================================================================== > > Incorporating the code into commercial > products is permitted; you do > not have to make source available or > contribute your changes back > (though that would be nice). > > --amk > > > (www.amk.ca) > > For the next PyCrypto release, I would like to take steps > to move toward a > clearer licensing regime. I am asking as many > copyright holders as I can > find if I can release PyCrypto under something clearer and > more standard. > Below, I have quoted a public domain dedication that was > recommended in > _Intellectual Property and Open Source: A Practical Guide > to Protecting > Code_, by Van Lindberg. I have already contacted A. > M. Kuchling, Robey > Pointer, Wim Lewis, Jeethu Rao, and Barry Warsaw, and they > have all > approved the following dedication for their contributions. > > I understand that you have made contributions to > PyCrypto. May I, on your > behalf, dedicate to the public domain all your > contributions to PyCrypto, > with the following notice? > > > ======================================================================= > The contents of this file are > dedicated to the public domain. To the > extent that dedication to the public > domain is not available, everyone > is granted a worldwide, perpetual, > royalty-free, non-exclusive license > to exercise all rights associated with > the contents of this file for > any purpose whatsoever. No > rights are reserved. > > ======================================================================= > > Regards, > - Dwayne > > -- Dwayne C. Litzenberger <dlitz@dlitz.net> > Key-signing key - 19E1 > 1FE8 B3CF F273 ED17 4A24 928C EC13 39C2 5CF7 > From dlitz@dlitz.net Mon Apr 20 20:01:37 2009 Date: Mon, 20 Apr 2009 20:01:37 -0400 From: "Dwayne C. Litzenberger" <dlitz@dlitz.net> To: moraes@computer.org Subject: Re: PyCrypto license clarification Message-ID: <20090421000137.GA29012@rivest.dlitz.net> References: <551071.34569.qm@web32405.mail.mud.yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <551071.34569.qm@web32405.mail.mud.yahoo.com> X-Primary-Address: dlitz@dlitz.net X-Homepage: http://www.dlitz.net/ X-OpenPGP: url=http://www.dlitz.net/go/gpgkey/; id=19E11FE8B3CFF273ED174A24928CEC1339C25CF7 (only for key signing); preference=unprotected X-OpenPGP: url=http://www.dlitz.net/go/gpgkey/; id=4B2AFD82FC7D9E3838D9179F1C11B877E7804B45 (2008); preference=signencrypt User-Agent: Mutt/1.5.16 (2007-06-11) Status: RO Content-Length: 3677 Thanks a lot, and don't worry about not responding to previous emails. I do that too much myself. :) On Mon, Apr 20, 2009 at 04:25:32PM -0700, M Moraes wrote: > >Hi Dwayne. > >Sure, the new license sounds fine for all my contributions to PyCrypto, and thanks for taking it on. My apologies for not responding to your previous e-mail. > >Regards, >Mark. > >--- On Sat, 4/18/09, Dwayne C. Litzenberger <dlitz@dlitz.net> wrote: > >> From: Dwayne C. Litzenberger <dlitz@dlitz.net> >> Subject: PyCrypto license clarification >> To: "Mark Moraes" <moraes@computer.org> >> Date: Saturday, April 18, 2009, 9:14 AM >> Hi Mark, >> >> I am the new maintainer of the Python Cryptography Toolkit, >> and I am >> working on a new release at http://www.pycrypto.org/. >> >> People often ask me what license PyCrypto is covered by, if >> it's >> GPL-compatible, etc. Right now, I'm not really sure >> what to tell them. >> The text in the current LICENSE file (quoted below) is not >> entirely clear >> on the point of whether distributing modified versions is >> allowed. (It >> says "distribute and use", but not "modify".) >> >> >> =================================================================== >> Distribute and use freely; there are >> no restrictions on further >> dissemination and usage except those >> imposed by the laws of your >> country of residence. This >> software is provided "as is" without >> warranty of fitness for use or >> suitability for any purpose, express >> or implied. Use at your own risk or >> not at all. >> >> =================================================================== >> >> Incorporating the code into commercial >> products is permitted; you do >> not have to make source available or >> contribute your changes back >> (though that would be nice). >> >> --amk >> >> >> (www.amk.ca) >> >> For the next PyCrypto release, I would like to take steps >> to move toward a >> clearer licensing regime. I am asking as many >> copyright holders as I can >> find if I can release PyCrypto under something clearer and >> more standard. >> Below, I have quoted a public domain dedication that was >> recommended in >> _Intellectual Property and Open Source: A Practical Guide >> to Protecting >> Code_, by Van Lindberg. I have already contacted A. >> M. Kuchling, Robey >> Pointer, Wim Lewis, Jeethu Rao, and Barry Warsaw, and they >> have all >> approved the following dedication for their contributions. >> >> I understand that you have made contributions to >> PyCrypto. May I, on your >> behalf, dedicate to the public domain all your >> contributions to PyCrypto, >> with the following notice? >> >> >> ======================================================================= >> The contents of this file are >> dedicated to the public domain. To the >> extent that dedication to the public >> domain is not available, everyone >> is granted a worldwide, perpetual, >> royalty-free, non-exclusive license >> to exercise all rights associated with >> the contents of this file for >> any purpose whatsoever. No >> rights are reserved. >> >> ======================================================================= >> >> Regards, >> - Dwayne >> >> -- Dwayne C. Litzenberger <dlitz@dlitz.net> >> Key-signing key - 19E1 >> 1FE8 B3CF F273 ED17 4A24 928C EC13 39C2 5CF7 >> > -- Dwayne C. Litzenberger <dlitz@dlitz.net> Key-signing key - 19E1 1FE8 B3CF F273 ED17 4A24 928C EC13 39C2 5CF7 Annual key (2008) - 4B2A FD82 FC7D 9E38 38D9 179F 1C11 B877 E780 4B45