Date: Mon, 21 Nov 2011 17:14:12 +0100 From: Samuele Giovanni Tonon <samu@...uxasylum.net> To: john-dev@...ts.openwall.com Subject: Re: best way to get ciphertext On 11/21/11 15:34, Lukas Odzioba wrote: > 2011/11/21 Samuele Giovanni Tonon <samu@...uxasylum.net>: >> since it looks like binary is not available inside crypt_all >> (because not yet setted?) i'm wondering which is best to do to solve >> the problem which in the end is quite simple: >> is there a good way to crypt and compare at the same time using the same >> function or shall i go with some nasty hacks ? >> Has anyone found similar problem on other formats ? >> >> Many thanks >> Samuele >> > > I think that void *binary seen by cmp_all and crypt_all can be > different places in memory. > See fmt_self_test() in formats.c. > Meaby you should call binary() value inside crypt_all - after some > tricks it should work without additional cost. for what i've seen there's no way to get ciphertext value before one of the cmp_??? functions . i've tried an ugly hack to get ciphertext from get_salt, which is usually called before crypt_all ; i did a memcpy(crypted_key,realcipher,BINARY_SIZE); inside get_salt() to save on a "local" variable that has been declared inside the fmt_plug.c file . this works nicely on the initial test, but after that crypted_key keeps on remaing a default value and never change; i suspect i'm not reading real data but just "gibberish" . i wish i could call binary() but i need ciphertext which is available only at a "superior" layer. any idea ? Regards Samuele
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