Date: Thu, 13 Jun 2013 09:04:35 +0530 From: Sayantan Datta <std2048@...il.com> To: john-dev@...ts.openwall.com Subject: Re: Mask mode for GPU On Thursday 13 June 2013 06:09 AM, Solar Designer wrote: > Yet I'd like us to implement the same kind of mask mode that those two > other crackers do. (We can then extend it in our own ways.) Okay. So first of all I need to figure out a way to generate the keys corresponding to the mask. After that we may apply the mask as we like. Also I think it is better to keep things simple on the gpu part: I am thinking to using only four configuration ?l ,?u, ?d, ?[0x20-0x2f] on GPU. Any other combination will need to be generated by the CPU. If someone needs alphanumeric key say ?[0-9][a-z]?[0-9][a-z] then the cpu will generate following masks for gpu: ?d?d , ?l?d, ?d?l, ?l?l Also the other missing characters such as ?[0x3A-0x40][0x5B-0x60][0x7B-0x7F][non printable ascii] will need to be genrated on cpu. Regards, Sayantan
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