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Message-ID: <160ea7297dfb1d49aed0f034b79355ed@smtp.hushmail.com>
Date: Fri, 08 May 2015 23:59:31 +0200
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: Advise on best approach (truecrypt pw based on pdf
file)
On 2015-05-08 23:19, magnum wrote:
> On 2015-05-08 19:47, Demian Smith wrote:
>> I've recently lost my truecrypt PW and am thinking to approach the
>> recovery with JtR but am unsure about the best approach to do so. So
>> hopefully I could get a couple of pointers into the correct direction of
>> setting it up.
>>
>> I know a couple of facts, which hopefully make it feasible in the first
>> place:
>> - I have created the password from a random page of a random book¹
>> - First letter MUST be capital
>> - No numbers or diacritics,
>> - Likely only I as second capital letter
>> - No digits
>> - Probably 5 -12 chars (I imagine it to be around 8, but that's guessing)
>
> Are you saying the password is made up from initial letters of a
> sentence? As in "To be or not to be, that's the question" -> "Tbontbttq".
Trying your sed magic, this seems to be the case. But did you use the
first sentence on a page, or a random one?
>> At the moment I have tried creating a fake pot file from ¹ and creating
>> a chr of it and then building a incremental rule:
> (...)
>> (¹ I have tried
>> cat INFILE | sed -re 's/[?!.:]/\n/g' | sed -re
>> 's/([A-Za-z])[A-Za-z]+[^A-Za-z]*/\1/g' > outfile
>
> Did you look at outfile and see if your sed magic does everything you
> thought? You should probably just adjust it a little.
Your version did not remove all spaces and did also not handle
one-letter words like "I" or "a". This seems to work better:
sed -re 's/[?!.:,;"]+ ?/\n/g' | sed -re
's/([A-Za-z])[A-Za-z]*[^A-Za-z]*/\1/g' | grep -E '^[A-Z]'
It's still flawed because it keeps the original linefeeds, breaking
sentences. I'd do it in Perl instead. Actually if you google a little
I'd be surprised if you can't find a perfected perl script ready to use!
magnum
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