cRARk 3.45

Fastest utility to crack RAR password
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New version with NVIDIA Kepler and AMD GCN support! cRARk for 7-Zip released!
 

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GUI & distributed RAR password recovery

cRARk for 7-Zip
 1996, cRARk 1.0 - just first RAR cracker
 2006, cRARk 3.0 - fastest recovery of RAR 3.0 passwords
 2009, cRARk 3.2 - world's first CUDA-aware RAR password recovery
 2011, cRARk 3.4 - world's first OpenCL-aware RAR password recovery
 
  Designed for NVidia CUDA Designed for OpenCL

cRARk purpose

The primary goal of cRARk is to
  • recover (crack) your forgotten password on RAR archives.
    Rar/WinRar versions 2.x-3.x-4.x up to 4.0 are supported.

Please bear in mind you have quite no chance to crack unknown password (longer than 6-7 symbols) if you have no additional info about it.
This is command-line utility for Win32, Linux, Mac OS.

RAR security overview
RAR/WinRAR archiver version 2.x used its proprietary, but rather strong encryption algorithm. At least no RAR 2.0 attacks were known except brute force for password recovery.
Starting from version 3.0, RAR has been using a strong AES algorithm, which also doesn't allow any attacks more effective than the brute force. Besides, the key derivation function uses more than 70000 SHA-1 transformations and brute force rate on modern CPU is very low, only several hundreds of passwords per second. This carries inference that RAR 3.x password encryption is one of the strongest between popular encryption systems in the context of brute force rate.

Features
Advantages of cRARk are:
  • Absolutely free
  • One of the fastest RAR password recovery software, uses extremely optimized MMX & SSE code
  • NEWOptimization for latest x86 instructions: AVX, XOP, AES-NI for Intel Sandy Bridge and AMD Bulldozer processors
  • Support of RAR password recovery on NVIDIA GPU using CUDA technology, and NEWusing OpenCL, on NVIDIA and AMD/ATI GPU's
  • Multi-volume, self-extracting, encrypted header archives support
  • Unique PCL language which is extremely efficient if user remembers any information about a forgotten password
  • Portability (DOS, Windows, Linux, Solaris, Mac OS versions are available)
  
 
 

cRARk download
cRARk v. 3.45 with CUDA support, for Windows, Win32/Win64 - recommended for NVIDIA GPU
cRARk v. 3.45 with OpenCL support, for Windows, Win32/Win64 - recommended for AMD GPU
Catalyst 12.10 drivers seem to not working, 12.8 and 12.11 beta are ok!
cRARk v. 3.43 with CUDA support, for Linux (binaries, kernel 2.6.24)
cRARk v. 3.43 with OpenCL support, for Linux (binaries, kernel 2.6.24)
cRARk v. 3.41 with no GPU support, for Linux (binaries, static, 700K)
cRARk v. 3.43 with CUDA support, for Mac OS X recommended for NVIDIA GPU
cRARk v. 3.43 with OpenCL support, for Mac OS X recommended for AMD GPU and no GPU

Crark GUI wrapper for Windows (900K)
I'm not an auhtor of this software, I'm not liable for any its using. Please contact directly the author if you find any bugs
 
 
 
Customer's FAQ
  • 0. What is the password for the achive?

    There is no password to the crark's executables and configuration files.

  • 1. How to break and then to continue the search.

    The program may be broken painlessly once the message "Testing XX-chars passwords..." is displayed, and then the search may be continued with - lXX option (both XX are equal).

  • 2. How to resume search from the password XXX?

    Sorry, no way. I's implemented in the PCL 3.0 used in Parallel Password Recovery.

  • 3. The program has been searching for 10 days, but my password is not yet at hand.

    Alas! It can't be helped. May be your password is too long, or the search set is wrong. Additional information on the password is necessary.

  • 4. There are files with different passwords in the archive. What am I to do?

    Just remove (using RAR) files with already known passwords.

  • 5. I have tested your program. To my mind, your program is nothing but utter error, it cannot even find "aaa2"-like password.

    RTFM. File password.def (from the distributed archive) searches through only lower-cased Latin letters. Change your password definition to "[$a $1] *" and everything will be ok.

  • 6. I've got beginning of one file from archive in plain text. Will it be useful to me?

    No. At least, I couldn't use it. Could you? RAR encryption sources are available in WinRAR distribution.

  • 7. I'd like to optimize your program. How can I get the sources?

    You don't need them. Take UnRar sources and optimize the SetCryptKeys() function. Next contact me.

  • 8. I need GUI, multicore support, pause/resume etc.

    cRARk is the free program, and I have no time to support such features. To find all you need, please look at GUI, multicore RAR Password Recovery which licensed cRARk and PCL engine.

More questions and answers you'll find in the included documentation.
About CUDA/OpenCL support
  • 1. Which GPU is supported by cRARk?

    You need NVIDIA GPU card with CUDA support with compute capability 1.1 or higher; or AMD Radeon GPU card 5xxx/6xxx series with OpenCL support. Here is the list of such a cards with the exception of GeForce 8800 GTX/GTS, which has capability 1.0 You also need the latest drivers with CUDA support for NVIDIA cards:
    CUDA-capable drivers
    Notebook drives or
    latest drivers with OpenCL support for AMD Radeon cards:
    OpenCL-capable drivers

  • 2. How to run crark on 64 bit OS?

    On Win64 it runs fine.
    On Linux amd64 apart from CUDA drivers and CUDA shared libraries, you should install the ia32-libs package.
    Under Mac OS you may need to boot in 32-bit mode.

  • 3. I've got an error like "cudaThreadSynchronize failed: launch exceeded timeout"
    or "Display driver stopped and has recovered".

    a. If you're using Windows Vista/7, please read the article. Or simply run the file driver-timeout.reg from the cRARk's archive and reboot.
    b. Try to use the recommended -d option (look at the program output).
    c. Don't run crark on primary graphics card, use separate GPUs for crark and monitor.

  • 4. Program hangs after printing "Trying to compile XXXX kernel".

    Please install the latest OpenCL drivers (you need at least Geforce 280.xx or Catalyst 11.7)..

  • 5. I've got any error in CUDA/OpenCL or CUDA/OpenCL is not working at all.

    Please install the latest drivers (see above).. Don't overclock neither GPU nor CPU!
    If this not helps, please install the fresh copy of your operating system and install the drivers.

  • 6. I'd like to optimize your CUDA code. How can I get the source?

    Here it is. If you reach better speed, please contact me.

 
 
 
PCL Language
A good online descripion of PDL language, which is 95% compatible with PCL, you may find here. 		 
 
  Last updated: 18 Oct 2012 © Pavel Semjanov, 2000-12