Export your Windows Bluetooth LE keys into Linux!

export-ble-infos.py

#!/usr/bin/python3
"""
Copyright 2021 Mygod

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.


What is this: Export your Windows Bluetooth LE keys into Linux!

Thanks to:
* http://console.systems/2014/09/how-to-pair-low-energy-le-bluetooth.html
* https://gist.github.com/corecoding/eac76d3da20c7e427a1848b8aed8e334/revisions#diff-6eeb0d27c24cc10680e8574f75648585

Usage:

$ ./export-ble-infos.py <args>
$ sudo bash -c 'cp -r ./bluetooth /var/lib && service bluetooth force-reload'
$ rm -r bluetooth
"""

import os
import shutil
import subprocess
import sys
import tempfile

from configparser import ConfigParser
from optparse import OptionParser

default_template = """
[General]
Name=Designer Mouse
Appearance=0x03c2
AddressType=static
SupportedTechnologies=LE;
Trusted=true
Blocked=false
Services=00001800-0000-1000-8000-00805f9b34fb;00001801-0000-1000-8000-00805f9b34fb;0000180a-0000-1000-8000-00805f9b34fb;0000180f-0000-1000-8000-00805f9b34fb;00001812-0000-1000-8000-00805f9b34fb;

[IdentityResolvingKey]
Key=

[LocalSignatureKey]
Key=
Counter=0
Authenticated=false

[LongTermKey]
Key=
Authenticated=0
EncSize=16
EDiv=
Rand=

[DeviceID]
Source=2
Vendor=1118
Product=2053
Version=272

[ConnectionParameters]
MinInterval=6
MaxInterval=6
Latency=60
Timeout=300
"""


def main():
    parser = OptionParser()
    parser.add_option("-v", "--verbose", action='store_true', dest='verbose')
    parser.add_option("-s", "--system", dest="system", metavar="FILE",
                      default="/mnt/Windows/System32/config/SYSTEM",
                      help="SYSTEM file in Windows. Usually at /Windows/System32/config/system.")
    parser.add_option("-k", "--key", dest="key", metavar="KEY",
                      default=r"ControlSet001\Services\BTHPORT\Parameters\Keys",
                      help="Registry key for BT. [default: %default]")
    parser.add_option("-o", "--output", dest="output", metavar="DIR", default="bluetooth",
                      help="Output directory. [default: %default]")
    parser.add_option("-t", "--template", dest="template", metavar="FILE", help="Template file.")
    parser.add_option("-a", "--attributes", dest='attributes', help="Additional attributes file to be copied.")
    options, args = parser.parse_args()

    if options.template:
        with open(options.template) as file:
            template = file.read()
    else:
        template = default_template

    out = tempfile.mktemp(".reg")
    reged = subprocess.Popen(["reged", "-x", options.system, '\\', options.key, out], stdout=sys.stderr)
    reged.wait()
    if reged.returncode:
        return reged.returncode
    dump = ConfigParser()
    with open(out) as file:
        reged_out = file.read()
        if options.verbose:
            print(reged_out)
        dump.read_string(reged_out.split('\n', 1)[1])
    os.unlink(out)

    for section in dump:
        path = section[len(options.key) + 2:].split('\\')
        assert not path[0]
        if len(path) == 3:
            path[1] = ':'.join([path[1][i:i + 2] for i in range(0, len(path[1]), 2)]).upper()
            path[2] = ':'.join([path[2][i:i + 2] for i in range(0, len(path[2]), 2)]).upper()
            print("Dumping {}/{}...".format(path[1], path[2]))
            config = ConfigParser()
            config.optionxform = str

            # See if device has been paired in Linux before
            existing_template = '/var/lib/bluetooth/{}/{}/info'.format(path[1], path[2])
            if (os.path.exists(existing_template)):
                with open(existing_template) as file:
                    config.read_string(file.read())
            else:
                config.read_string(template)

            def read_reg(key, expected_type):
                def read_reg_actual(key, expected_type):
                    actual_type, content = dump[section]['"{}"'.format(key)].split(':', 1)
                    if expected_type == 'hex16':
                        assert actual_type == 'hex'
                        content = content.split(',')
                        assert len(content) == 16
                        return ''.join(content).upper()
                    if expected_type == 'qword':
                        assert actual_type == 'hex(b)'
                        content = content.split(',')
                        assert len(content) == 8
                        return str(int(''.join(content[::-1]), 16))
                    if expected_type == 'dword':
                        assert actual_type == expected_type
                        return str(int(content, 16))
                    assert False
                result = read_reg_actual(key, expected_type)
                if options.verbose:
                    print("{} of type {}: {}".format(key, expected_type, result))
                return result
            config['LongTermKey']['Key'] = read_reg('LTK', 'hex16')
            # KeyLength ignored for now
            config['LongTermKey']['Rand'] = read_reg('ERand', 'qword')
            config['LongTermKey']['EDiv'] = read_reg('EDIV', 'dword')
            if '"IRK"' in dump[section]:
                config['IdentityResolvingKey']['Key'] = read_reg('IRK', 'hex16')
            if '"CSRK"' in dump[section]:
                config['LocalSignatureKey']['Key'] = read_reg('CSRK', 'hex16')
            output_dir = os.path.join(options.output, path[1], path[2])
            os.makedirs(output_dir, exist_ok=True)
            with open(os.path.join(output_dir, 'info'), 'w') as file:
                config.write(file, False)
            if options.attributes:
                shutil.copyfile(options.attributes, os.path.join(output_dir, 'attributes'))


if __name__ == "__main__":
    sys.exit(main())

I'm using also designer mouse but mouse cant connecting after run these script and commands. The CSRK key was blank, I added it from BTkeys. Unfortunately still not working on fedora 32.

@n1vgabay - seems you are missing the appropriate python module. Might be that you don't have the dependency chntpw installed. Try 'sudo apt install chntpw'

if that doesn't work, try manually installing the package to python with 'pip install configparser'

So i installed this package with python-pip as well, now i've got this massege:

reged version 0.1 140201, (c) Petter N Hagen
openHive(/mnt/Windows/System32/config/SYSTEM) failed: No such file or directory, trying read-only
openHive(/mnt/Windows/System32/config/SYSTEM) in fallback RO-mode failed: No such file or directory
Unable to open/read hive /mnt/Windows/System32/config/SYSTEM, exiting..

Any ideas how to solve this issue to make it work finally?

And something i wondered since i saw this script,
How should i run this script? according to this usage above.

Usage:
$ ./export-ble-infos.py # # # Do i need to add arguments when run this py script?
$ sudo bash -c 'cp -r ./bluetooth /var/lib && service bluetooth force-reload'
$ rm -r bluetooth
"""

I'm assuming that the path I see in the script isn't working.. i mout windows and linux but maybe it's not enough.
I can see my windows file through: **/media/$user/OS ... and so on ..

Is it still working? I'm trying to use it, the result is the same of the one that I've generated by hand but my mouse cannot connect properly. Any help?

Edit:
It sounds that with Linux 5.9+ there are some "issues" with the Bluetooth stack. Removing [IdentityResolvingKey] Key=... fix the issue.
Ref: https://wiki.archlinux.org/index.php/Bluetooth#Problems_with_all_BLE_devices_on_kernel_5.9+

Fantastic. I'm not really a Python guru, so I can't tell what's going on here, but it works 👍

Is it still working? I'm trying to use it, the result is the same of the one that I've generated by hand but my mouse cannot connect properly. Any help?

Edit:
It sounds that with Linux 5.9+ there are some "issues" with the Bluetooth stack. Removing [IdentityResolvingKey] Key=... fix the issue.
Ref: https://wiki.archlinux.org/index.php/Bluetooth#Problems_with_all_BLE_devices_on_kernel_5.9+

Thanks @thymbahutymba

commented out this line(by adding the # sign) and my bluetooth keyboard now works both on windows and linux.

# config['IdentityResolvingKey']['Key'] = read_reg('IRK', 'hex16')

This doesn't seem to be working for me. The script runs fine, and I see 'Designer Mouse' show up in my Bluetooth device list but it just won't connect to my mouse.
I see in my info file for the mouse that the LocalSignatureKey is blank, is that normal? What do I have to do to get that key to fill in properly?

It turns out that the default template doesn't have the right configuration for my mouse. I manually copied some of the keys from the scripts output into my mouse's info file and it worked.

Then after checking the script a little closer I found that if you connect your device to Linux first, then connect it in Windows, and then come back to Linux and run the script, the script will apply the keys it grabbed from Windows and add them into your mouse's already existing info file. (I don't know if it's necessary, but I also turned off my mouse after pairing it in Windows and didn't turn it back on until after I ran the script and moved the files as directed.)

Note: I had to run the script as root in order for the script to be able to find my mouse's already existing info file.
$ sudo ./export-ble-infos.py -s /media/brad/Windows-SSD/Windows/System32/config/SYSTEM
$ sudo bash -c 'cp -r ./bluetooth /var/lib && service bluetooth force-reload'
$ sudo rm -r bluetooth

I found for the following line #L137:
if "CSRK" in dump[section]:

I need to change it to:
if '"CSRK"' in dump[section]:

At least for Python3.8/Ubuntu 20.04 and Windows 10.. unsure if that works on other combos.. i see the quoting logic exists in read_reg () though.

In Windows 10 2h20 when connect Designer mouse no such keys in regedit.
But on others version this method works good.

Very useful - thanks! Worked perfectly (Win 10/Ubuntu 18.04 on Dell XPS). Only problem I had was:

FileNotFoundError: [Errno 2] No such file or directory: 'reged': 'reged'

Solved by installing chntpw, then all good :)

Is this supposed to be run from Windows or Linux?

@Mygod what license is this under?

@jamincollins Hi I added APL-2.0 license for this. Cheers!

This is exactly what I needed. Just ran the script, copied the values and it just works. Thank you so much!

@lathiat Thanks! I took your patch.

My new ROG GLADIUS III WL don't have an IRK on both Windows 10 and Linux, I did the same trick Mygod did to CSRK in L157 to make IRK optional and it works.

Just for the record, I get KeyError: '"IRK"' when the script is parsing the dumped registry.

@escape0707 Did you mean IRK?

@escape0707 Did you mean IRK?

Oh, yes. Sorry for the confusion. I’ve corrected my original comment.

@escape0707 Added your fix as suggested.

Thank you! That's just what I need, and it works very well for my little manjaro laptop.

This used to work for me, but after upgrading to Fedora 37 (not sure if its related), the following fields appears on my info file:

• [RemoteSignatureKey]
• [PeripheralLongTermKey]
• [SlaveLongTermKey]

Both [PeripheralLongTermKey] and [SlaveLongTermKey] with their own EDiv and ERand, but there's no corresponding Key on the Windows registry. Have you guys ever had this happen?

THANK YOU SO MUCH, I had to change the windows path in the script but after that it worked like a charm. This is the only tool I've used so far that was able to sync my Logi M550L in both OSes.

This used to work for me, but after upgrading to Fedora 37 (not sure if its related), the following fields appears on my info file:

* [RemoteSignatureKey]

* [PeripheralLongTermKey]

* [SlaveLongTermKey]

Both [PeripheralLongTermKey] and [SlaveLongTermKey] with their own EDiv and ERand, but there's no corresponding Key on the Windows registry. Have you guys ever had this happen?

This script actually does account for this, can attest to it working.

I'm assuming that the path I see in the script isn't working.. i mout windows and linux but maybe it's not enough. I can see my windows file through: **/media/$user/OS ... and so on ..

The MS Windows partition must be mounted to /mnt.
Maybe this could be either made configurable or mentioned in the usage section?

Reading

parser.add_option("-s", "--system", dest="system", metavar="FILE",
                      default="/mnt/Windows/System32/config/SYSTEM",
                      help="SYSTEM file in Windows. Usually at /Windows/System32/config/system.")

it actually is by the -s option but the help entry suggests that the mount point is not.

Any guide on how to use this script?

Download it as export-ble-infos.py, and then run lsblk to find out your Microsoft Windows partition, say /dev/sdb1, mount it by sudo mount /dev/sdb1 /mnt and then run

$ chmod a+x ./export-ble-infos.py
$ ./export-ble-infos.py <args>
$ sudo bash -c 'cp -r ./bluetooth /var/lib && service bluetooth force-reload'
$ rm -r bluetooth

to import all Bluetooth Low Energy devices, such as Microsoft Designer Mouse and Keyboard, from Microsoft Windows >= 10 to Linux.

@pramodhrachuri I mean it's literally written in the first screen you'll see when opening this page. If you can read others reply, you can read it too. https://gist.github.com/Mygod/f390aabf53cf1406fc71166a47236ebf#file-export-ble-infos-py-L24

And also python ./export-ble-infos.py --help...