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Subject:	Re: Weird behavior of crypt
To:	cygwin AT cygwin DOT com
References:	<CAFFOgCUoiL06QNFvXOJ-E46FOmpG4S_K4O52k+rt_Ysxpw2aag AT mail DOT gmail DOT com>
From:	Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Message-ID:	<56AB4F64.3070807@gmail.com>
Date:	Fri, 29 Jan 2016 12:39:16 +0100
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On 29/01/2016 12:18, Alexandre Garnier wrote:
> Hello.
> I'm trying to do SHA-512 password encryption, but the result is really
> weird on Cygwin:
>
> # On Cygwin(either 32 or 64) 2.4.1-1, latest updates with crypt 1.1-1,
> libcrypt0 1.1-1, libcrypt-devel 1.1-1
> $ crypt '$6$7dl4B0fKUimdnR$' test_value
> $6wOs/zKP2jDM
>
> $ python -c 'import crypt; print crypt.crypt("test_value",
> "$6$7dl4B0fKUimdnR$")' # Python 2.7.10
> $6wOs/zKP2jDM
>
> $ perl -e 'print crypt("test_value", "\$6\$7dl4B0fKUimdnR\$")."\n"' #
> Perl v5.22.1
> $6wOs/zKP2jDM
>
> Am I missing something?
>
> On other system, I get a more expected result:
>
> # On Ubuntu 15.04
> $ mkpasswd --method=SHA-512 test_value 7dl4B0fKUimdnR
> $6$7dl4B0fKUimdnR$f6gCu.3IfrxhsnJKFnusDH.UudC.lLOSB1G3D1bIboWxlixzBy2xO/3rCKHmzfwekCTvmQd11bPdcsJOaLkCJ.
>

Not SHA-512, see
/usr/share/doc/crypt/crypt.README

This is the DES-crypt package Version 1.1

It provides a static library libcrypt.a as well as a shared library
cygcrypt-0.dll together with a link lib libcrypt.dll.a, which export
the functions

         crypt(3)
         encrypt(3)
         setkey(3)

The passwords created by crypt(3) are 56 bit DES encrypted and are
100% identical to those created by the Linux crypt().

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