Decrypt BitLocker encrypted drive through Linux


Once I had a situation, my work laptop (based on M$ win7 as per choice of organisation) entered into most infamous “Blue screen of Death”. The hard disk was BitLocker encrypted and the data on it was very important for me due to its research value. Do you know how Linux helped me to recover my data ?

Dislocker can access BitLocker

Thanks to Romain Coltel who has designed dislocker to read BitLocker encrypted partition under Linux and Mac OSX systems

Dislocker into  Live Linux

Any Live Linux image with gcc compiler, make, FUSE & PolarSSL Headers works well. I preferred lightweight Lubuntu/Xubuntu. 16.04 was the version I worked with. Download the iso image and prepare the USB bootable stick with unetbootin

Boot the system with this Live stick and become root

sudo -i

Install following for compiling dislocker. FILE or FUSE two decryption modes are available for dislocker.  I went with fuse because each request for a piece of data in this mode takes the time to decrypt that data only.

apt-get install gcc cmake make libfuse-dev libmbedtls-dev ruby-dev

Download Dislocker, compile and install

tar -xzf dislocker-0.7.1.tar.gz
cd dislocker-0.7.1
cmake <strong>.</strong> #check the dot
make install

Find the target partition by

 fdisk -l

decrypt BitLocker disk (assuming the partition /dev/sdcX in this example) either by user_password method -u or recovery_password -p

mkdir /mnt/bitlocker

dislocker-fuse -r -V /dev/sdcX -u<password> -- /mnt/bitlocker
dislocker-fuse -r -V /dev/sdcX -pxxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxx  -- /mnt/bitlocker

Note: replace xxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxx
with BitLocker recovery_password 
-V = BitLocker volume 
-- = mark the end of program's options and the beginning of FUSE's ones 
-p = recovery_password
-u = user_password 
-r = read only BitLocker volume

This generates a file dislocker-file  which can be mounted by loop device for accessing the file as block device

mkdir /mnt/data
mount -r -o loop /mnt/bitlocker/dislocker-file /mnt/data

All decrypted data are now available at /mnt/data


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