Date: Tue, 24 Apr 2012 21:12:07 -0300 From: Claudio André <claudioandre.br@...il.com> To: john-dev@...ts.openwall.com Subject: Re: SHA-256 code from Bitcoin miners Hi, I've been looking at these miners for a while. But since i'm not a criptographic guy, i haven't found (easy) good ideas. But, now looking at some recent opencl files in this "cgminer", i noticed there are some ideas and/or probably the correct syntax of something i failed to use in the past. I'll try the opencl usage part and i'll report. Cheers Em 24-04-2012 20:36, Solar Designer escreveu: > Hi, > > I think we should look at and consider for reuse suitably licensed > SHA-256 implementations from Bitcoin miners. Here's one: > > https://github.com/ckolivas/cgminer > > It includes 4-way SIMD implementations of SHA-256 for SSE2 and AltiVec, > two optimized OpenCL kernels (one of them for GCN), and more. (In fact, > I found it by searching the web for GCN instruction names, which > suggests that the kernel was optimized with specific generated > instructions in consideration.) > > While this miner as a whole has recently been relicensed to GPLv3 (as > far as I understand), most of the individual files we're interested in > have their own license statements on them and are under much more > relaxed licenses. So we should be able to take them for modification > and reuse in JtR. > > diablo120328.cl (non-GCN) is under GPLv3+, but perhaps we can start with > an older version, which maybe was still under GPLv2 (I did not check yet). > > Alexander
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