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OfflineFungi_x
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Cracking a Password Protected RAR?
    #4495890 - 08/04/05 06:07 PM (11 years, 4 months ago)

I just found a password protected rar file on my web server and can't remember what the password was. I have tried all my passwords so something cool must me inside. Any one know of a good way to crack this baby open?


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HAPPY FUCKING HOLIDAYS!


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Invisibledaussaulit
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Re: Cracking a Password Protected RAR? [Re: Fungi_x]
    #4495904 - 08/04/05 06:11 PM (11 years, 4 months ago)

there's brute force crackers that you can easily find on google, but depending how long the password possibly could be, it could take literally forever. Your best bet is just to try more combinations that your old password might have been.


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InvisibleMushie_Man
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Re: Cracking a Password Protected RAR? [Re: daussaulit]
    #4499135 - 08/05/05 10:34 AM (11 years, 4 months ago)

I wish someone (smarter than me) could/would write a program to remove the whole password module altogether, rather then crack it, just go around it. Or maybe a program which could force itself into the files programming and retrieve the password for you. I'm sure its possible, just haven't found any program of the sort yet.


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Ecstacy got me standing next to you
Getting sentimental as fuck spillin' guts to you
We just met
But I think I'm in love with you
But you're on it too
So you tell me you love me too
Wake up in the morning like "yo, what the fuck we do?"


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OfflineGulGen
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Re: Cracking a Password Protected RAR? [Re: Mushie_Man]
    #4499349 - 08/05/05 12:08 PM (11 years, 4 months ago)

I don't think that is possible. If it were that easy it would have been done by now.

Any respectable passwording system (which I'll assume this falls under) wouldn't be a "module" that gives permission to access the data, for just that reason - it'd be easy to crack. Instead the password is (or rather is transformed into) an encryption key. It's not a wall to block you from seeing the data, instead it garbles all of the data according to algorithms that can only be reversed by knowing the password initially given that was used in part of that algorithm.

That's why brute force is the only way to get the data. A series of passwords are tried until it returns a meaningful stream of decrypted data.

And as daussaulit pointed out, brute force can take a very, very long time. If the password is reasonably long (more than maybe 6 or 7 characters) and not something that a dictionary-based method would figure out then it's damn near impossible* to get at the juicy data goodness inside in any reasonable length of time.


*excluding governments, telepaths, and advanced alien civilizations :shiftyeyes:


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Invisibledaussaulit
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Re: Cracking a Password Protected RAR? [Re: GulGen]
    #4499357 - 08/05/05 12:12 PM (11 years, 4 months ago)

You know, if you had a quantum computer you could crack it in a few seconds.


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Offlinemagicbastard
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Re: Cracking a Password Protected RAR? [Re: daussaulit]
    #4499375 - 08/05/05 12:17 PM (11 years, 4 months ago)

I'm sorry for asking but could linux help?


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OfflineGulGen
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Re: Cracking a Password Protected RAR? [Re: daussaulit]
    #4499480 - 08/05/05 12:53 PM (11 years, 4 months ago)

Arg, you're right. I forgot quantum computers. Oh well, let's say that fits under the government exclusion, since NSA are the only ones that might actually have such things. And the aliens.

And to magicbastard - nope. Unless said linux happens to be running on a quantum computer, but since I haven't seen anything on slashdot about linux being ported to quantum computers yet I'd have to say no.


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Invisiblefufungi
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Re: Cracking a Password Protected RAR? [Re: Fungi_x]
    #4502335 - 08/06/05 01:55 AM (11 years, 3 months ago)

If I remember correctly rar uses AES encryption, so the only option is a brute force attack, which is possible but could take a long time depending on the password


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OfflineFungi_x
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Re: Cracking a Password Protected RAR? [Re: fufungi]
    #4519821 - 08/10/05 11:05 PM (11 years, 3 months ago)

i remembered the password, It was a bunch of "private" pics of me and my girl :grin:

EDIT: My girl who is leering over my shoulder just reminded me she remembered the pass :blush: :grin: :rolleyes:


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HAPPY FUCKING HOLIDAYS!


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InvisibleOJK
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Re: Cracking a Password Protected RAR? [Re: Fungi_x]
    #4537720 - 08/15/05 01:54 PM (11 years, 3 months ago)

How many characters was it, just for the sake of interest? Depending on the version of the RAR algorhythm used, it'd be interesting to see how long cracking it would have taken.


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Invisiblefufungi
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Re: Cracking a Password Protected RAR? [Re: Fungi_x]
    #4539923 - 08/15/05 10:41 PM (11 years, 3 months ago)

and feel free to share more pics :wink: :thumbup: :cool:


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