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Date: Sun, 22 Feb 2015 20:53:19 -0500
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Subject: Cygwin DLLs being modified somehow?
From: Michael DePaulo <mikedep333 AT gmail DOT com>
To: The Cygwin Mailing List <cygwin AT cygwin DOT com>
Cc: Mihai Moldovan <ionic AT ionic DOT de>, Stefan Baur <x2go-ml-1 AT baur-itcs DOT de>
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X-IsSubscribed: yes

I am seeing very weird behavior and I am hoping that someone can explain it.

This happens on 2 different machines. My personal Windows 10 64-bit
machine, and a Windows 7 64-bit VM hosted by the X2Go project on
another continent.

It seems to be happening to multiple DLLs, but I will list one example below.

I install 32-bit Cygwin with the 2.870 installer

libopenssl100 is one of the packages that gets installed. It is at
version. 1.0.1k-1

/bin/cygcrypto-1.0.0.dll always appears to be 1,820,199 bytes, and it
always appears to be last modified on 1/8/2015 20:30 UTC.

When I extract it from the tarball:
Its md5sum is:
c79b900428d91e5882c24bbb6bc36969
And its sha256sum is:
53376a3d69be996cb71abda41b7cc6bea7a599b027fe819323fafc3c433b7767

Yet on both systems, once installed, its m5sum and sha1sum differ!

On my personal machine
8b6881e6aab4b8438a6db784003a39fb
0a4db441c5faff305b28bcddbaeae91d824ed7b39146a55f423d970d362fe6df

On the X2Go project machine:
3ebfce45e66f227bc8f753ad1ef314a7
9305561f1417f2121ae2f05fd64ca9405814f757ab1eee8a4746963520e1724f

I do not know assembly. Another X2Go Developer, Mihai Moldovan (CC'd)
and I took a brief look at the disassembled output from objdump. It
looks like the addresses differ.

-Mike

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