XMPPwocky / nodebeefcl

Recovers V8 Math.random seed from outputs, even when they are not consecutive.

nodebeefcl

Recovers V8 Math.random seed from outputs, even when they are not consecutive.

Usage

python beef.py 18273 0.12345678 0.42424242 0.86737282

Replace 18273 with 18030 to handle different versions of V8/Node.

Dependencies

Python 2.x, numpy, PyOpenCL.

Examples

Running nodebeefcl on Debian and Intel i915 GPU

Install the dependencies

$ sudo apt-get install python-pyopencl beignet-opencl-icd

#
# You'll need to disable the i915 hang check otherwise `dmesg` will be filled with
# this:
#
# [143867.599237] [drm] GPU HANG: ecode 7:0:0x8fd8ffff, in python [24620], reason: Ring hung, action: reset
# [143867.601402] drm/i915: Resetting chip after gpu hang
# [143889.586677] [drm] stuck on render ring
#

$ sudo bash -c 'echo N > /sys/module/i915/parameters/enable_hangcheck'

#

$ python beef.py 18273 0.8102033962495625 0.8550206781364977
Starting search...
Found 13 results.
    State: (1234620265, 179273058)
            0.99755238764919340611
            0.33525288174860179424

# Victory !