Bluetooth Low Energy (BLE) devices support

[KeyofBlueS]

Bluetooth Low Energy (BLE) devices pairing keys are managed differently than standard bluetooth devices.
Since I don't own any BLE device I'am unable to add support for them.

If you have a BLE device and you want their support to be implemented, you can help by posting the info i need:

The info file of the BLE device in linux:

sudo cat "/var/lib/bluetooth/${bt_controller_macaddr}/${bt_device_macaddr}/info"

• where ${bt_controller_macaddr} is the MAC Address of the bluetooth controller and ${bt_device_macaddr} is the MAC Address of the BLE device.

The exported registry file of windows containing the BLE device credentials.

To obtain this file:

• install chntpw
  sudo apt install chntpw
• Mount the windows partition
• Locate the SYSTEM hive file in the windows partition, usually is something like "<windows_mount_point>/Windows/System32/config/SYSTEM"
• Export the keys
  sudo reged -x "<windows_mount_point>/Windows/System32/config/SYSTEM" "HKEY_LOCAL_MACHINE\SYSTEM" "ControlSet001\Services\BTHPORT\Parameters\Keys" "/tmp/exported_keys.reg"
• print the exported registry
  cat "/tmp/exported_keys.reg"

I need these in order to compare the formats between the linux info file and the exported windows registry file.

Please do not hesitate to post here for any questions or difficulty you may have about this issue.

Thanks and best regards!

[Konfekt]

Hello, does https://gist.github.com/Mygod/f390aabf53cf1406fc71166a47236ebf not solve this problem?

[KeyofBlueS]

Hi! that link doesn't contain an example of both the info file from linux and an exported registry file from windows of the same BLE device, so it doesn't help me.

Thanks for the suggestion anyway!

[Konfekt]

I am sorry for bailing out yet again, but perhaps digitalbirdo/BT-LinkkeySync#12 (comment) provides these?

[KeyofBlueS]

You don't have to apologize, you're trying to help! unfortunately that doesn't have what I need either.

[Konfekt]

So https://github.com/digitalbirdo/BT-LinkkeySync/files/7692834/8863df8a2d80.zip reads

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\BTHPORT\Parameters\Keys\8863df8a2d80]
"MasterIRK"=hex:89,33,21,51,13,ba,02,8c,f6,ca,f6,5c,70,61,25,e0
"f47335106159"=hex:91,b7,92,af,29,ef,90,c2,e5,b6,58,67,90,2a,64,61
"d06544a8dc1e"=hex:26,68,5b,11,c8,52,f0,4f,f9,15,5c,1f,ae,7b,76,05

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\BTHPORT\Parameters\Keys\8863df8a2d80\eea5434f6491]
"LTK"=hex:ba,3c,a0,d1,fc,05,2c,be,3c,4d,76,2f,3f,4e,79,ff
"KeyLength"=dword:00000010
"ERand"=hex(b):6b,5a,17,42,54,5f,3c,53
"EDIV"=dword:0000dffc
"IRK"=hex:89,33,21,51,13,ba,02,8c,f6,ca,f6,5c,70,61,25,e0
"Address"=hex(b):91,64,4f,43,a5,ee,00,00
"AddressType"=dword:00000001
"MasterIRKStatus"=dword:00000001
"AuthReq"=dword:0000002d

What is missing?

[KeyofBlueS]

The linux counterpart is missing. As stated in the first post i need both the info file of the BLE device in linux and the exported registry file of windows containing the BLE device credentials.

[Konfekt]

True, it's for Mac.

Here are the bluetooth keys for a Designer Mouse paired to Linux and Windows:

cat /var/lib/bluetooth/B4:69:21:81:8F:AC/DB:97:6E:1C:E3:C1/info

[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;
WakeAllowed=true

[IdentityResolvingKey]
Key=CC4F342A1C010F1A31192CC7838B8842

[LocalSignatureKey]
Key=F1A2B36895473568884501EDD4EB01C3
Counter=0
Authenticated=false

[LongTermKey]
Key=D9168778509DF0EC3CADEEA386657848
Authenticated=0
EncSize=16
EDiv=5033
Rand=9705591926826931727

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

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

cat cat /tmp/exported_keys.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BTHPORT\Parameters\Keys]

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BTHPORT\Parameters\Keys\207918bba156]

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BTHPORT\Parameters\Keys\b46921818fac]
"MasterIRK"=hex:a4,8b,8d,aa,cf,82,77,5d,ea,95,14,f0,bd,56,b6,8a
"84cfbf9368bf"=hex:7e,ef,f2,7c,57,f8,e0,bd,22,63,03,c8,95,8e,4d,b7
"dc2c26dc9b3e"=hex:50,66,b4,c7,38,6a,62,dc,0c,32,63,31,f9,c7,cd,72
"001b66899e67"=hex:4e,44,86,0b,36,f9,63,82,c6,2b,6d,d6,62,88,03,2e

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BTHPORT\Parameters\Keys\b46921818fac\db976e1ce3c1]
"LTK"=hex:d9,16,87,78,50,9d,f0,ec,3c,ad,ee,a3,86,65,78,48
"KeyLength"=dword:00000010
"ERand"=hex(b):0f,16,6b,5d,6f,30,b1,86
"EDIV"=dword:000013a9
"IRK"=hex:cc,4f,34,2a,1c,01,0f,1a,31,19,2c,c7,83,8b,88,42
"Address"=hex(b):c1,e3,1c,6e,97,db,00,00
"AddressType"=dword:00000001
"CSRK"=hex:f1,a2,b3,68,95,47,35,68,88,45,01,ed,d4,eb,01,c3
"OutboundSignCounter"=dword:00000000
"MasterIRKStatus"=dword:00000001
"AuthReq"=dword:0000002d

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\BTHPORT\Parameters\Keys\b46921818fac\e4f030eb3d56]
"LTK"=hex:42,4f,1a,f2,9f,9a,9d,cd,09,69,0c,37,7b,b8,7c,90
"KeyLength"=dword:00000010
"ERand"=hex(b):ec,87,e8,e9,f6,ac,45,96
"EDIV"=dword:0000a596
"IRK"=hex:52,f0,07,c3,9a,c4,41,72,48,b1,72,73,2d,b1,5d,0e
"Address"=hex(b):56,3d,eb,30,f0,e4,00,00
"AddressType"=dword:00000001
"CSRK"=hex:18,28,3b,5f,9f,ed,e2,2f,7f,2d,cc,62,88,d6,d4,39
"OutboundSignCounter"=dword:00000000
"MasterIRKStatus"=dword:00000001
"AuthReq"=dword:0000002d

[KeyofBlueS]

This is gold, thanks!

It turns out the code i wrote for ble was mostly good.
Are you willing to test it from ble branch? https://github.com/KeyofBlueS/bt-keys-sync/tree/ble
If yes, you could try these different scenarios:

Scenario 1:

• Pair the device only in windows.
• Run this script in linux.
• Expected Results: bluetooth device not found in linux. Please pair this device in linux.

Scenario 2:

• Pair the device only in linux.
• Run this script in linux.
• Expected Results: bluetooth device not found in windows. Please pair this device in windows.

Scenario 3:

• Pair the device in linux first, then in windows.
• Run this script in linux.
• Choose windows when prompted which pairing key you want to use?
• Expected Results: bluetooth device will connect in both linux and windows.

Scenario 4 ONLY IF YOU ARE WILLING TO TO RISK!:

• Pair the device in windows first, then in linux.
• Run this script in linux.
• Choose linux when prompted which pairing key you want to use?
• Expected Results: bluetooth device will connect in both linux and windows.

[Konfekt]

It does not find any devices in Windows. Scenario 2 works thus well, the others not. Instead https://gist.github.com/Mygod/f390aabf53cf1406fc71166a47236ebf/raw/8514b2bd949c1f56a8d922ac284345b489dee871/export-ble-infos.py works perfectly.

[KeyofBlueS]

Could you please post the output of bt-keys-sync -o?