Hi, SHA1 is easy to implement. If you want an always-working backup, I have a couple of C versions I wrote myself. Libraries are only interesting if they offer significant speedups through cpu-dependance. Especially since the shader cache is not in the happy fun land of hardware-based attacks (or attacks in the first place).
Best, OG. On Fri, Dec 12, 2014 at 10:48 AM, Jose Fonseca <jfons...@vmware.com> wrote: > On 11/12/14 22:02, Brian Paul wrote: >> >> On 12/11/2014 02:51 PM, Carl Worth wrote: >>> >>> From: Kristian Høgsberg <k...@bitplanet.net> >>> >>> The upcoming shader cache uses the SHA-1 algorithm for cryptographic >>> naming. These new mesa_sha1 functions are implemented with the nettle >>> library. >>> --- >>> >>> This patch is another in support of my upcoming shader-cache work. >>> Thanks to >>> Kritian for coding this piece. >>> >>> As currently written, this patch introduces a new dependency of Mesa >>> on the >>> Nettle library to implement SHA-1. I'm open to recommendations if >>> people would prefer some other option. >>> >>> For example, the xserver can be configured to get a SHA-1 >>> implementation from >>> libmd, libc, CommonCrypto, CryptoAPI, libnettle, libgcrypt, libsha1, or >>> openssl. >>> >>> I don't know if it's important to offer as many options as that, which >>> is why >>> I'm asking for opinions here. >> >> >> >> We'll need a solution for Windows too. I don't have time right now to >> do any research into that. > > > Yes, ideally we'd have something small that we could bundle into mesa source > tree, for sake of non Linux OSes. > > If Windows was the only concern, we could use its Crypto API, > http://msdn.microsoft.com/en-us/library/windows/desktop/aa382379.aspx and > avoid depending on anything else, but some of the above mention libraries > are not trivial to install. > > The other alternative is to disable shader cache when no suitable dependency > is found. That is, make this an optional dependency. > > Jose > > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/mesa-dev _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
