Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

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!

share|improve this question

2 Answers 2

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.

share|improve this answer
    
@mahmooh, Yeah, that security point I made, now is the cause of my headache! –  fly hipy Mar 7 '13 at 8:49

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.

share|improve this answer
    
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 Mar 7 '13 at 8:44
    
@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 Mar 7 '13 at 19:16
    
@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 Mar 8 '13 at 8:18
1  
@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 Mar 8 '13 at 9:00

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.