Date: Fri, 2 Oct 2015 08:56:13 +0530 From: Sayantan Datta <std2048@...il.com> To: john-dev <john-dev@...ts.openwall.com> Subject: Re: GPU-side mask vs. tens of millions of hashes On Fri, Oct 2, 2015 at 2:28 AM, magnum <john.magnum@...hmail.com> wrote: > Sayantan, > > I got the idea to test a really large number of hashes with GPU-side mask > (primarily to stress-test the new FMT_REMOVE code), and it bailed > ungracefully: > > $ ../run/john 25m_md5.in -form:raw-md5-opencl -mask:?a -min-len=3 > -max-len=6 > Device 0: GeForce GTX TITAN X > Loaded 24917564 password hashes with no different salts (Raw-MD5-opencl > [MD5 OpenCL]) > 128 bit add overflow. > > Is this an expected outcome, or is 25 million hashes supposed to work > fine? If it's not supposed to work, what is the design maximum? Perhaps we > can bail out with a bit more finesse, eg. telling the user a max.? > > oclHashcat supports "up to 100 million hashes". I'm not sure we need to > support that, but it wouldn't hurt. > > magnum > > This is an issue with table building. I'll fix. 25 million shouldn't be much of an issue. In fact, I had 100-120 million hashes in mind when writing tables algorithm, and I tested it for 110 million 128bit hashes and upto 60 million 192 bit hashes. However, as solar said, some adjustments are required regarding initial table size. Regards, Sayantan Content of type "text/html" skipped
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.