Crypto-erase tool for BitLocker volumes
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README.md
blwipe.go

README.md

blwipe

blwipe is a tool that performs cryptographic erasure on BitLocker volumes. This allows you to "erase" BitLocker volumes very quickly by just overwriting areas where the key material are stored on the volume.

The tool is written in Go, so it should compile into a "static" binary and is easily cross-compilable.

Installation

You will need to install Go.

To download and compile blwipe, use go get:

go get github.com/geekman/blwipe

The blwipe executable should now be in your $GOPATH/bin directory.

Usage

Run blwipe on the BitLocker volume image to display details about the volume:

blwipe /dev/sda1

It should tell you the location of the metadata blocks. If you want it to dump the parsed structures, pass -v.

You can also use the entire device (e.g. /dev/sda) or image file and specify an offset to use, for example -offset 0x10000 if the partition starts there. The specified offset can be of other bases, as long as you specify the right prefix (i.e. 0 for octal, 0x for hex).

To actually wipe the volume, pass the -wipe flag:

blwipe -wipe /dev/sda1

You will NOT receive any prompts or confirmation.

License

blwipe is licensed under the 3-clause ("modified") BSD License.

Copyright (C) 2018 Darell Tan

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
  3. The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.