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# bitcracker
Bitcracker
========
BitCracker is the first open source BitLocker password cracker tool
Introduction
===
BitLocker is a full-disk encryption feature available in recent Windows versions (Vista, 7, 8.1 and 10) Pro and Enterprise.
BitCracker is a mono-GPU password cracking tool for memory units encrypted with the password authentication mode of BitLocker (see picture below).
![alt text](http://openwall.info/wiki/_media/john/bitcracker_img1.png)
Our attack has been tested on several memory units encrypted with BitLocker running on Windows 7, Window 8.1 and Windows 10 (both compatible and non-compatible mode).
here we present two implementations: CUDA and OpenCL.
Requirements
===
For CUDA implementation, you need at least CUDA 7.5 and an NVIDIA GPU with minimum cc3.5 (i.e. Kepler arch)
Build
===
Use the buil.sh script to run makefiles within CUDA_version and OpenCL_version
Limitations
===
For the moment, BitCracker is able to evaluate passwords having lenght
Dictionary
===
BitCracker doesn't provide any mask attack, cache mechanism or smart dictionary creation; thus you need to provide your own input dictionary.
Performance
===
Here we report best performance of BitCracker implementations tested on different GPUs
| GPU Acronim | GPU | Arch | CC | # SM | Clock | CUDA |
| ------------ | --------------- | ------- | --- | ---- | ------ | ---- |
| GFT | GeForce Titan | Kepler | 3.5 | 14 | 835 | 7.0 |
| GTK80 | Tesla K80 | Kepler | 3.5 | 13 | 875 | 7.5 |
| GFTX | GeForce Titan X | Maxwell | 5.2 | 24 | 1001 | 7.5 |
| GTP100 | Telsa P100 | Pascal | 6.1 | 56 | 1328 | 8.0 |
| AMDM | Radedon Malta | - | - | - | - | - |
Performance:
| Version | GPU | -t | -b | Passwords x kernel | Passwords/sec | Hash/sec |
| -------- | ------ | --- | -- | ------------------ | ------------- | ---------- |
| CUDA | GFT | 8 | 13 | 106.496 | 303 | 635 MH/s |
| CUDA | GTK80 | 8 | 14 | 114.688 | 370 | 775 MH/s |
| CUDA | GFTX | 8 | 24 | 106.608 | 933 | 1.957 MH/s |
| CUDA | GTP100 | 8 | 56 | 458.752 | 1.363 | 2.858 MH/s |
| OpenCL | AMDM | 32 | 64 | 524.288 | 241 | 505 MH/s |
| OpenCL | GFTX | 8 | 24 | 196.608 | 884 | 1.853 MH/s |
John The Ripper
===
We released the OpenCL version as a plugin of the John The Ripper (bleeding jumbo) suite.
http://openwall.info/wiki/john/OpenCL-BitLocker
References, credits and contacts
===