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From dlitz@dlitz.net Sat Feb 28 23:24:14 2009
Date: Sat, 28 Feb 2009 23:24:14 -0500
From: "Dwayne C. Litzenberger" <dlitz@dlitz.net>
To: Jeethu Rao <jeethurao@gmail.com>
Subject: PyCrypto license clarification
Message-ID: <20090301042414.GA15122@rivest.dlitz.net>
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Hi Jeethu,

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, and Wim Lewis, and they have all approved the following text 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, 9 Mar 2009 02:57:54 +0530
Message-ID: <e3c0ddba0903081427p3a7b1058g417dd8624df68d6d@mail.gmail.com>
Subject: Re: PyCrypto license clarification
From: Jeethu Rao <jeethurao@gmail.com>
To: "Dwayne C. Litzenberger" <dlitz@dlitz.net>
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Hi Dwayne,My contribution to pycrypto are very very minimal (The sha256
module, IIRC).
I'd be fine with the public domain license for PyCrypto.

Jeethu Rao
PS: Apologies for the delay in my response.
I don't really check this email address all that often,
please direct any further correspondence to jeethu@jeethurao.com

On Sun, Mar 1, 2009 at 9:54 AM, Dwayne C. Litzenberger <dlitz@dlitz.net>wrote:

> Hi Jeethu,
>
> 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, and Wim Lewis, and they have all approved the following text 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
>



-- 
Jeethu Rao

--000e0cd209d0e5a3d40464a23054
Content-Type: text/html; charset=ISO-8859-1
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Hi Dwayne,<div>My contribution to pycrypto are very very minimal (The sha25=
6 module, IIRC).</div><div>I&#39;d be fine with the public domain license f=
or PyCrypto.</div><div><br></div><div>Jeethu Rao</div><div>PS: Apologies fo=
r the delay in my response.=A0</div>
<div>I don&#39;t really check this email address all that often,</div><div>=
please direct any further correspondence to <a href=3D"mailto:jeethu@jeethu=
rao.com">jeethu@jeethurao.com</a><br><div><br><div class=3D"gmail_quote">On=
 Sun, Mar 1, 2009 at 9:54 AM, Dwayne C. Litzenberger <span dir=3D"ltr">&lt;=
<a href=3D"mailto:dlitz@dlitz.net">dlitz@dlitz.net</a>&gt;</span> wrote:<br=
>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex;">Hi Jeethu,<br>
<br>
I am the new maintainer of the Python Cryptography Toolkit, and I am workin=
g on a new release at <a href=3D"http://www.pycrypto.org/" target=3D"_blank=
">http://www.pycrypto.org/</a>.<br>
<br>
People often ask me what license PyCrypto is covered by, if it&#39;s GPL-co=
mpatible, etc. =A0Right now, I&#39;m not really sure what to tell them. =A0=
The text in the current LICENSE file (quoted below) is not entirely clear o=
n the point of whether distributing modified versions is allowed. =A0(It sa=
ys &quot;distribute and use&quot;, but not &quot;modify&quot;.)<br>

<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>
Distribute and use freely; there are no restrictions on further<br>
dissemination and usage except those imposed by the laws of your<br>
country of residence. =A0This software is provided &quot;as is&quot; withou=
t<br>
warranty of fitness for use or suitability for any purpose, express<br>
or implied. Use at your own risk or not at all.<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>
<br>
Incorporating the code into commercial products is permitted; you do<br>
not have to make source available or contribute your changes back<br>
(though that would be nice).<br>
<br>
--amk =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0(<a href=3D"http://www.amk.ca" target=3D=
"_blank">www.amk.ca</a>)<br>
<br>
For the next PyCrypto release, I would like to take steps to move toward a =
clearer licensing regime. =A0I am asking as many copyright holders as I can=
 find if I can release PyCrypto under something clearer and more standard. =
=A0Below, I have quoted a public domain dedication that was recommended in =
_Intellectual Property and Open Source: A Practical Guide to Protecting Cod=
e_, by Van Lindberg. =A0I have already contacted A. M. Kuchling, Robey Poin=
ter, and Wim Lewis, and they have all approved the following text for their=
 contributions.<br>

<br>
I understand that you have made contributions to PyCrypto. =A0May I, on you=
r behalf, dedicate to the public domain all your contributions to PyCrypto,=
 with the following notice?<br>
<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>
The contents of this file are dedicated to the public domain. =A0To the<br>
extent that dedication to the public domain is not available, everyone<br>
is granted a worldwide, perpetual, royalty-free, non-exclusive license<br>
to exercise all rights associated with the contents of this file for<br>
any purpose whatsoever. =A0No rights are reserved.<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>
<br>
Regards,<br>
- Dwayne<br><font color=3D"#888888">
<br>
-- <br>
Dwayne C. Litzenberger &lt;<a href=3D"mailto:dlitz@dlitz.net" target=3D"_bl=
ank">dlitz@dlitz.net</a>&gt;<br>
 =A0 =A0 =A0Key-signing key =A0 - 19E1 1FE8 B3CF F273 ED17 =A04A24 928C EC1=
3 39C2 5CF7<br>
</font></blockquote></div><br><br clear=3D"all"><br>-- <br>Jeethu Rao<br>
</div></div>

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