Add rough notes on bluetooth console setup ; insecure ; you don't want this without thinking things through deeply
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49
docs/bt_console/BtAutoPair.py
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49
docs/bt_console/BtAutoPair.py
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#!/usr/bin/python3
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# encoding=utf8
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import sys
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import time
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import pexpect
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import subprocess
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class BtAutoPair:
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"""Class to auto pair and trust with bluetooth."""
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def __init__(self):
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p = subprocess.Popen("/usr/local/bin/bt-auto-agent", shell = False)
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out = subprocess.check_output("/usr/sbin/rfkill unblock bluetooth", shell = True)
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self.child = pexpect.spawn("bluetoothctl", echo = False)
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def get_output(self,command, pause = 0):
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"""Run a command in bluetoothctl prompt, return output as a list of lines."""
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self.child.send(command + "\n")
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time.sleep(pause)
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start_failed = self.child.expect(["bluetooth", pexpect.EOF])
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if start_failed:
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raise BluetoothctlError("Bluetoothctl failed after running " + command)
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return self.child.before.split("\r\n")
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def enable_pairing(self):
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"""Make device visible to scanning and enable pairing."""
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print("pairing enabled")
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try:
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out = self.get_output("power on")
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out = self.get_output("discoverable on")
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out = self.get_output("pairable on")
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out = self.get_output("agent off")
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except BluetoothctlError, e:
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print(e)
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return None
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def disable_pairing(self):
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"""Disable devices visibility and ability to pair."""
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try:
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out = self.get_output("discoverable off")
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out = self.get_output("pairable off")
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except BluetoothctlError, e:
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print(e)
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return None
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5
docs/bt_console/README.md
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5
docs/bt_console/README.md
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# UNSUPPORTED
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The code and information in this folder is currently **UNSUPPORTED**.
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Use this information at your own risk.
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47
docs/bt_console/bluezutils.py
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docs/bt_console/bluezutils.py
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import dbus
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SERVICE_NAME = "org.bluez"
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ADAPTER_INTERFACE = SERVICE_NAME + ".Adapter1"
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DEVICE_INTERFACE = SERVICE_NAME + ".Device1"
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def get_managed_objects():
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bus = dbus.SystemBus()
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manager = dbus.Interface(bus.get_object("org.bluez", "/"),
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"org.freedesktop.DBus.ObjectManager")
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return manager.GetManagedObjects()
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def find_adapter(pattern=None):
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return find_adapter_in_objects(get_managed_objects(), pattern)
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def find_adapter_in_objects(objects, pattern=None):
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bus = dbus.SystemBus()
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for path, ifaces in objects.iteritems():
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adapter = ifaces.get(ADAPTER_INTERFACE)
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if adapter is None:
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continue
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if not pattern or pattern == adapter["Address"] or \
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path.endswith(pattern):
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obj = bus.get_object(SERVICE_NAME, path)
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return dbus.Interface(obj, ADAPTER_INTERFACE)
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raise Exception("Bluetooth adapter not found")
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def find_device(device_address, adapter_pattern=None):
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return find_device_in_objects(get_managed_objects(), device_address,
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adapter_pattern)
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def find_device_in_objects(objects, device_address, adapter_pattern=None):
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bus = dbus.SystemBus()
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path_prefix = ""
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if adapter_pattern:
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adapter = find_adapter_in_objects(objects, adapter_pattern)
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path_prefix = adapter.object_path
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for path, ifaces in objects.iteritems():
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device = ifaces.get(DEVICE_INTERFACE)
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if device is None:
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continue
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if (device["Address"] == device_address and
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path.startswith(path_prefix)):
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obj = bus.get_object(SERVICE_NAME, path)
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return dbus.Interface(obj, DEVICE_INTERFACE)
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raise Exception("Bluetooth device not found")
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190
docs/bt_console/bt-auto-agent
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docs/bt_console/bt-auto-agent
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#!/usr/bin/python2
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from __future__ import absolute_import, print_function, unicode_literals
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from optparse import OptionParser
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import sys
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import dbus
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import dbus.service
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import dbus.mainloop.glib
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try:
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from gi.repository import GObject
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except ImportError:
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import gobject as GObject
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import bluezutils
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BUS_NAME = 'org.bluez'
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AGENT_INTERFACE = 'org.bluez.Agent1'
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AGENT_PATH = "/test/agent"
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bus = None
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device_obj = None
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dev_path = None
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def ask(prompt):
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try:
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return raw_input(prompt)
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except:
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return input(prompt)
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def set_trusted(path):
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props = dbus.Interface(bus.get_object("org.bluez", path),
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"org.freedesktop.DBus.Properties")
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props.Set("org.bluez.Device1", "Trusted", True)
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def dev_connect(path):
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dev = dbus.Interface(bus.get_object("org.bluez", path),
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"org.bluez.Device1")
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dev.Connect()
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class Rejected(dbus.DBusException):
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_dbus_error_name = "org.bluez.Error.Rejected"
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class Agent(dbus.service.Object):
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exit_on_release = True
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def set_exit_on_release(self, exit_on_release):
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self.exit_on_release = exit_on_release
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@dbus.service.method(AGENT_INTERFACE,
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in_signature="", out_signature="")
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def Release(self):
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print("Release")
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if self.exit_on_release:
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mainloop.quit()
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@dbus.service.method(AGENT_INTERFACE,
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in_signature="os", out_signature="")
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def AuthorizeService(self, device, uuid):
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print("AuthorizeService (%s, %s)" % (device, uuid))
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return # automatically authorize connection
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authorize = ask("Authorize connection (yes/no): ")
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if (authorize == "yes"):
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return
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raise Rejected("Connection rejected by user")
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@dbus.service.method(AGENT_INTERFACE,
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in_signature="o", out_signature="s")
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def RequestPinCode(self, device):
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print("RequestPinCode (%s)" % (device))
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set_trusted(device)
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#return ask("Enter PIN Code: ")
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return "0000" # return default PIN Code of 0000
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@dbus.service.method(AGENT_INTERFACE,
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in_signature="o", out_signature="u")
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def RequestPasskey(self, device):
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print("RequestPasskey (%s)" % (device))
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set_trusted(device)
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#passkey = ask("Enter passkey: ")
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passkey = "0000" # return default passkey of 0000
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return dbus.UInt32(passkey)
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@dbus.service.method(AGENT_INTERFACE,
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in_signature="ouq", out_signature="")
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def DisplayPasskey(self, device, passkey, entered):
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print("DisplayPasskey (%s, %06u entered %u)" %
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(device, passkey, entered))
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@dbus.service.method(AGENT_INTERFACE,
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in_signature="os", out_signature="")
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def DisplayPinCode(self, device, pincode):
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print("DisplayPinCode (%s, %s)" % (device, pincode))
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@dbus.service.method(AGENT_INTERFACE,
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in_signature="ou", out_signature="")
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def RequestConfirmation(self, device, passkey):
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print("RequestConfirmation (%s, %06d)" % (device, passkey))
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set_trusted(device)
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return # automatically trust
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confirm = ask("Confirm passkey (yes/no): ")
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if (confirm == "yes"):
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set_trusted(device)
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return
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raise Rejected("Passkey doesn't match")
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@dbus.service.method(AGENT_INTERFACE,
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in_signature="o", out_signature="")
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def RequestAuthorization(self, device):
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print("RequestAuthorization (%s)" % (device))
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return # automatically authorize
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auth = ask("Authorize? (yes/no): ")
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if (auth == "yes"):
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return
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raise Rejected("Pairing rejected")
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@dbus.service.method(AGENT_INTERFACE,
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in_signature="", out_signature="")
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def Cancel(self):
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print("Cancel")
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def pair_reply():
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print("Device paired")
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set_trusted(dev_path)
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dev_connect(dev_path)
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mainloop.quit()
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def pair_error(error):
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err_name = error.get_dbus_name()
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if err_name == "org.freedesktop.DBus.Error.NoReply" and device_obj:
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print("Timed out. Cancelling pairing")
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device_obj.CancelPairing()
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else:
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print("Creating device failed: %s" % (error))
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mainloop.quit()
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if __name__ == '__main__':
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dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
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bus = dbus.SystemBus()
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capability = "KeyboardDisplay"
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parser = OptionParser()
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parser.add_option("-i", "--adapter", action="store",
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type="string",
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dest="adapter_pattern",
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default=None)
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parser.add_option("-c", "--capability", action="store",
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type="string", dest="capability")
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parser.add_option("-t", "--timeout", action="store",
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type="int", dest="timeout",
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default=60000)
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(options, args) = parser.parse_args()
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if options.capability:
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capability = options.capability
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path = "/test/agent"
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agent = Agent(bus, path)
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mainloop = GObject.MainLoop()
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obj = bus.get_object(BUS_NAME, "/org/bluez");
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manager = dbus.Interface(obj, "org.bluez.AgentManager1")
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manager.RegisterAgent(path, capability)
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print("Agent registered")
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# Fix-up old style invocation (BlueZ 4)
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if len(args) > 0 and args[0].startswith("hci"):
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options.adapter_pattern = args[0]
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del args[:1]
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if len(args) > 0:
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device = bluezutils.find_device(args[0],
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options.adapter_pattern)
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dev_path = device.object_path
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agent.set_exit_on_release(False)
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device.Pair(reply_handler=pair_reply, error_handler=pair_error,
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timeout=60000)
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device_obj = device
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else:
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manager.RequestDefaultAgent(path)
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mainloop.run()
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#adapter.UnregisterAgent(path)
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#print("Agent unregistered")
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70
docs/bt_console/bt_serial_console.md
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docs/bt_console/bt_serial_console.md
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# Bluetooth Serial Console
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The below information will help you setup bluetooth as a serial console on the Raspberry Pi. This is **WILDLY INSECURE** and should **NEVER** be trusted.
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This is here for folks who don't want to add a serial adapter to their builds and/or need a quick and dirty way to get into a PiFrame from their phone.
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**DO NOT USE THIS IF YOU'RE UNSURE OF THE SECURITY IMPLICATIONS**
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``` sh
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https://www.historiantech.com/create-a-bluetooth-wireless-console-server-with-raspberry-pi-zero-w/
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https://www.raspberrypi.org/forums/viewtopic.php?t=272419
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https://www.raspberrypi.org/forums/viewtopic.php?t=170353
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https://play.google.com/store/apps/details?id=de.kai_morich.serial_bluetooth_terminal
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apt install pi-bluetooth python-pexpect python-dbus rfkill
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systemctl reboot
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echo "PRETTY_HOSTNAME=piframe" > /etc/machine-info
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/usr/local/bin/bt-auto-agent
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/usr/local/bin/bluezutils.py
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/usr/local/bin/BtAutoPair.py
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sed -i 's/#DiscoverableTimeout = 0/DiscoverableTimeout = 0/g' /etc/bluetooth/main.conf
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nano -w /usr/local/bin/bt-config.sh
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#!/usr/bin/python2
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import BtAutoPair
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autopair = BtAutoPair.BtAutoPair()
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autopair.enable_pairing()
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chmod a+x /usr/local/bin/bt-config.sh
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mkdir /etc/systemd/system/bluetooth.service.d/
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cat > /etc/systemd/system/bluetooth.service.d/piframe.conf <<EOF
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[Service]
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ExecStartPre=/usr/bin/hciconfig hci0 up
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ExecStart=
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ExecStart=/usr/lib/bluetooth/bluetoothd -C
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ExecStartPost=/usr/bin/sdptool add SP
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ExecStartPost=/bin/hciconfig hci0 piscan
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ExecStartPost=/usr/local/bin/bt-config.sh
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EOF
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cat > /etc/systemd/system/rfcomm.service <<EOF
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[Unit]
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Description=RFCOMM service
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After=bluetooth.service
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Requires=bluetooth.service
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[Service]
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ExecStart=/usr/bin/rfcomm watch hci0 1 getty rfcomm0 115200 vt100
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[Install]
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WantedBy=multi-user.target
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EOF
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systemctl daemon-reload
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systemctl enable --now bluetooth.service
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systemctl restart bluetooth.service
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systemctl enable --now rfcomm
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```
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