Date: Mon, 20 May 2013 21:12:36 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: Parallella: bcrypt Katja - On Mon, May 20, 2013 at 08:57:52PM +0400, Solar Designer wrote: > On Mon, May 20, 2013 at 06:45:26PM +0200, Katja Malvoni wrote: > > I tried to reuse the existing Openwall bcrypt implementation since > > parallella supports C. I first tried the simplest approach, load whole > > bcrypt implementation onto the core and execute. The problem is: > > core_test.elf section `.text' will not fit in region `INTERNAL_RAM' > > region `INTERNAL_RAM' overflowed by 6528 bytes > > Note that you do not have to put the entire bcrypt onto Epiphany. [...] > (implementing just the main loop instead of the entire bcrypt on > Epiphany) should reduce code size to put on Epiphany by a factor of 3. A possibly simpler and possibly better option, especially given the approach you've taken so far, may be to put a size-optimized implementation of entire bcrypt on Epiphany. Here is a revision of crypt_blowfish that we made for musl libc: http://git.musl-libc.org/cgit/musl/tree/src/crypt/crypt_blowfish.c IIRC, it's under 8 KB of code on x86. musl itself (including the crypt_blowfish revision in it) may be downloaded here: http://www.musl-libc.org/download.html I think you'll need to implement both approaches and compare the resulting performance eventually, but you may start with either. Alexander
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