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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>
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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

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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>
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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>
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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