Date: Thu, 28 Feb 2019 11:39:34 -0600 From: jfoug <jfoug.openwall@....net> To: john-users@...ts.openwall.com Subject: Re: prepending and appending salts in dynamic formats On 2/28/2019 11:15 AM, Royce Williams wrote: > [many other helpful things snipped] > > This is something that I hadn't absorbed - the key insight that will help > me to move forward. > > Thanks very much! You are welcome. The 'normal' procedure for dynamic, is this: 0. john cracker logic will set passwords, then set the first salt 1. clear the data 2. append each part of the input, to build the proper input string 3. crypt_all (storing result in output 1) 4. john cracker logic will run cmp_all/cmp_one/cmp_exact to find anything cracked 5. If there are more salts, set the next salt, and goto step 1. 6. goto step 0 dynamic is much more complex that this, but the above steps are the 'norm'. In the above, the step 1 and step 2 are what are in the dynamic 'script' written. The other steps are the infrastructure of john's cracker mode code. So the very simple 'normal' logic for dynamic, is to clear the buffers, then to build the input string(s) using append functions, then call the proper crypt functions.
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