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From Don Lewis <truck...@apache.org>
Subject Re: svn commit: r1756954 [1/2] - in /openoffice/trunk/main: ./ openssl/
Date Fri, 19 Aug 2016 20:15:12 GMT
On 19 Aug, Dennis E. Hamilton wrote:
> Great commit messages!
> 
>> -----Original Message-----
>> From: truckman@apache.org [mailto:truckman@apache.org]
>> Sent: Friday, August 19, 2016 11:28
>> To: commits@openoffice.apache.org
>> Subject: svn commit: r1756954 [1/2] - in /openoffice/trunk/main: ./
>> openssl/
>> 
>> Author: truckman
>> Date: Fri Aug 19 18:28:06 2016
>> New Revision: 1756954
>> 
>> URL: http://svn.apache.org/viewvc?rev=1756954&view=rev
>> Log:
>> Update the bundled version of OpenSSL from 0.9.8zh to 1.0.2h which
>> fixes many vulnerabiliies and adds support for newer, more secure
>> ciphers and versions of the protocol.
>> 
>> Note: OpenSSL version 1.0.2h contains two known minor vulnerabilites,
>> CVE-2016-2177 and CVE-2016-2178, which will be fixed in the next
>> OpenSSL release.  Their potential impact is low enough that that
>> various Linux distros have chosen not to apply the upstream patches
>> to the versions that they distribute.
>> 
>> On Windows, there is an optional new dependency on NASM,
>> <http://www.nasm.us/>.  If NASM is not available, then the C
>> implementations of the low-level crypto code will be used instead
>> of the optimized assembly language versions.  Since OpenOffice is
>> not a heavy user of this code, the impact should be minor.  If NASM
>> is installed, but its location is not in $PATH, the directory
>> containing nasm.exe should be passed to configure using --with-nasm-
>> home.
>> 
> [ ... ]
> [orcmid] 
> 
> Does the NASM code do the right thing with regard to CPU model
> detection?  It sounds like there may be dependencies on instructions
> that may not be on all processors for which Apache OpenOffice is
> supported.  I am thinking in particular about processors on which
> Windows XP will run but Windows 7 and later will not because of
> hardware protection requirements and, I suspect, extended instruction
> sets.

It is supposed to select the appropriate version of the code at runtime
based on the CPU feature bits that tell whether the machine supports the
newer SSE* and AVX instructions.  I should be able to give this a try in
the next few days.


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