93 lines
3.3 KiB
Python
93 lines
3.3 KiB
Python
"""
|
|
*******************************************************************************
|
|
* Ledger Blue
|
|
* (c) 2016 Ledger
|
|
*
|
|
* 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.
|
|
********************************************************************************
|
|
"""
|
|
|
|
from abc import ABCMeta, abstractmethod
|
|
from ledgerblue.comm import Dongle
|
|
from ledgerblue.commException import CommException
|
|
from ledgerblue.ledgerWrapper import wrapCommandAPDU, unwrapResponseAPDU
|
|
from binascii import hexlify
|
|
from bluepy import btle
|
|
|
|
SERVICE_UUID = "D973F2E0-B19E-11E2-9E96-0800200C9A66"
|
|
WRITE_CHARACTERISTICS_UUID = "D973F2E2-B19E-11E2-9E96-0800200C9A66"
|
|
NOTIFY_CHARACTERISTICS_UUID = "D973F2E1-B19E-11E2-9E96-0800200C9A66"
|
|
CLIENT_CHARACTERISTICS_CONFIG_DESCRIPTOR_UUID = "00002902-0000-1000-8000-00805f9b34fb"
|
|
ENABLE_NOTIFICATION = "0100".decode('hex')
|
|
DEFAULT_BLE_CHUNK = 20
|
|
BLE_NOTIFICATION_TIMEOUT = 5.0
|
|
|
|
class BLEDongleDelegate(btle.DefaultDelegate):
|
|
def __init__(self, dongle):
|
|
btle.DefaultDelegate.__init__(self)
|
|
self.dongle = dongle
|
|
|
|
def handleNotification(self, cHandle, data):
|
|
self.dongle.result += bytearray(data)
|
|
|
|
class BLEDongle(Dongle):
|
|
|
|
# Must be called with the Client Characteristics Configuration descriptor handle as bluepy fails to retrieve it
|
|
# From gatttools
|
|
# [device mac][LE]> char-desc
|
|
# handle: 0x000f, uuid: 00002902-0000-1000-8000-00805f9b34fb
|
|
def __init__(self, bleAddress, configDescriptor, debug=False):
|
|
self.device = btle.Peripheral(bleAddress)
|
|
self.device.setDelegate(BLEDongleDelegate(self))
|
|
self.service = self.device.getServiceByUUID(SERVICE_UUID)
|
|
self.writeCharacteristic = self.service.getCharacteristics(forUUID=WRITE_CHARACTERISTICS_UUID)[0]
|
|
self.device.writeCharacteristic(configDescriptor, ENABLE_NOTIFICATION, withResponse=True)
|
|
self.debug = debug
|
|
self.opened = True
|
|
|
|
def exchange(self, apdu, timeout=20000):
|
|
if self.debug:
|
|
print "=> %s" % hexlify(apdu)
|
|
apdu = wrapCommandAPDU(0, apdu, DEFAULT_BLE_CHUNK, True)
|
|
offset = 0
|
|
while(offset < len(apdu)):
|
|
data = apdu[offset:offset + DEFAULT_BLE_CHUNK]
|
|
self.writeCharacteristic.write(data, withResponse=True)
|
|
offset += DEFAULT_BLE_CHUNK
|
|
self.result = ""
|
|
while True:
|
|
if not self.device.waitForNotifications(BLE_NOTIFICATION_TIMEOUT):
|
|
raise CommException("Timeout")
|
|
response = unwrapResponseAPDU(0, self.result, DEFAULT_BLE_CHUNK, True)
|
|
if response is not None:
|
|
result = response
|
|
dataStart = 0
|
|
swOffset = len(response) - 2
|
|
dataLength = len(response) - 2
|
|
break
|
|
sw = (result[swOffset] << 8) + result[swOffset + 1]
|
|
response = result[dataStart : dataLength + dataStart]
|
|
if self.debug:
|
|
print "<= %s%.2x" % (hexlify(response), sw)
|
|
if sw <> 0x9000:
|
|
raise CommException("Invalid status %04x" % sw, sw)
|
|
return response
|
|
|
|
def close(self):
|
|
if self.opened:
|
|
try:
|
|
self.device.disconnect()
|
|
except:
|
|
pass
|
|
self.opened = False
|