How to recover my .rar file password on windows OS?

-1

I have a book about C++ Programming that two years ago solved all of its chapters exercises successfully. Then saved all of these source codes into a folder, added it to a .rar file by WinRAR tool with a specific password and saved that file into my USB flash.

Now unfortunately I forgot the password, I remember that password was something like "The C++ Resolvents" or "The resolvents of C++ exercises" or ...with upper or lower cases.

I know there are some tools to recover .rar file passwords such as RAR_Password_Unlocker and so on, but:

1- It takes too long time (days or perhaps months!) to recover that long password and my machine should be On during this time!!!

2- I think they do not support spaces between password, while I'm sure there are at least two or three spaces in my password.

Does any one know is there a quick(er) way to recover my password?

Thanks in advance!

fly hipy

Posted 2013-03-07T07:30:21.577

Reputation: 55

Answers

It is nearly impossible to break a rar password with off the shelf programs. You have to use brute force option which may takes months.

mahmood

Posted 2013-03-07T07:30:21.577

Reputation: 655

@mahmooh, Yeah, that security point I made, now is the cause of my headache! – fly hipy – 2013-03-07T08:49:42.843

I would make a list of any and all words you even suspect might appear in the password, then use a shell script or a C program to generate the permutations and try them.

Nicole Hamilton

Posted 2013-03-07T07:30:21.577

Reputation: 8 987

I don't know what the shell script is at all, and like the second way more, but I don't know the C, only C++, and again how to write that specific program. I don't have such skill, and those exercises were in primary level. – fly hipy – 2013-03-07T08:44:55.220

@flyhipy: There are password cracker programs that will do this for you (test all known combinations of characters/words you know, or perform other attacks such as brute force, dictionary, known-plaintext etc.), but that's not going to help you magically recover the password in a jiffy unless it was short or otherwise very weak. "takes too long time" to crack the password is a good thing, otherwise what's the point of password protecting something if the encryption can be broken by anyone in an instant? – Karan – 2013-03-07T19:16:09.150

@Karan & others: Yeah, that's right about the work of password protecting tools, but my case is different. I don't know any password cracker that supports spaces and gets known words of that password as a list which only works on it. Maybe the comment of "Nicole Hamilton" be the best/only solution. Anyway, Thanks for all you guys. – fly hipy – 2013-03-08T08:18:34.587

@flyhipy: A program such as this one allows spaces to be part of the user-defined charset, and the words you want can be included in a custom dictionary. Try it and see if it works for you.

– Karan – 2013-03-08T09:00:00.920