def sign_tx(self, msg):
'''
This function starts workflow of signing Bitcoin transaction.
Function set up the environment and send back a input request message,
asking computer for first input.
'''
self.set_main_state()
if msg.inputs_count < 1:
return proto.Failure(
message='Transaction must have at least one input')
if msg.outputs_count < 1:
return proto.Failure(
message='Transaction must have at least one output')
if msg.random == '':
return proto.Failure(message='No random data received')
self.inputs_count = msg.inputs_count
self.outputs_count = msg.outputs_count
self.random = msg.random
return proto.TxRequest(request_type=proto.TXINPUT,
request_index=self.input_index)
def _check_address_n(self, msg):
if len(msg.address_n):
# Recalculate output address and compare with msg.address
if msg.address != self.wallet.get_address(msg.address_n):
self.set_main_state()
return proto.Failure(
message="address_n doesn't belong to given bitcoin address"
)
def process_debug_message(self, msg):
# Process messages handled by debugging connection
try:
return self._process_debug_message(msg)
except Exception as exc:
traceback.print_exc()
self.set_main_state()
return proto.Failure(message=str(exc))
def otp_check(self, otp):
if otp == self.otp:
msg = self.otp_func(*self.otp_args)
self.otp_cancel()
return msg
else:
time.sleep(3)
self.otp_cancel()
return proto.Failure(code=3, message="Invalid OTP")
def _process_debug_message(self, msg):
if isinstance(msg, proto.DebugLinkGetState):
# Report device state
return self.debug_get_state(msg)
if isinstance(msg, proto.LoadDevice):
return self.debug_load_wallet(msg.algo, msg.seed, msg.otp, msg.pin, msg.spv)
self.set_main_state()
return proto.Failure(code=1, message="Unexpected message")
def tx_input(self, msg):
'''
This message is called on tx input message.
'''
if msg.index != self.input_index:
self.set_main_state()
return proto.Failure(
message="Input index doesn't correspond with internal state")
print "RECEIVED INPUT", msg
if msg.index == self.signing_index:
# Store message to cache for serializing input in tx_output
self.signing_input = msg
'''
There we have received one input.
'''
if self.signing_index == 0:
'''
If it is first one, we have to prepare
and hash the beginning of the transaction.
'''
if self.input_index == 0:
# First input, let's hash the beginning of tx
self.input_hash = hashlib.sha256(
signing.raw_tx_header(self.inputs_count))
self.tx_hash = self.input_hash
#self.tx_hash.update()
#self.input_hash.update(signing.raw_tx_input())
#self.tx_hash.update(signing.raw_tx_input())
# TODO
'''
For every input, hash the input itself.
'''
print "INPUT HASH", self.input_hash.hexdigest()
# TODO
if self.input_index < self.inputs_count - 1:
'''
If this is not the last input, request next input in the row.
'''
self.input_index += 1
return proto.TxRequest(request_type=proto.TXINPUT,
request_index=self.input_index)
'''
We have processed all inputs. Let's request transaction outputs now.
'''
self.output_index = 0
self.output_hash = hashlib.sha256()
return proto.TxRequest(request_type=proto.TXOUTPUT,
request_index=self.output_index)
def process_message(self, msg):
# Any exception thrown during message processing
# will result in Failure message instead of application crash
try:
ret = self._process_message(msg)
if isinstance(ret, proto.Failure):
self.set_main_state()
return ret
except Exception as exc:
traceback.print_exc()
self.set_main_state()
return proto.Failure(message=str(exc))
def check(self, otp):
# OTP is displayed with spaces, but they aren't significant
otp = otp.replace(' ', '')
if otp == self.otp:
msg = self.func(*self.args)
self.cancel()
return msg
else:
time.sleep(3)
self.cancel()
self.set_main_state()
return proto.Failure(code=3, message="Invalid OTP")
def pin_check(self, pin):
if self.pin_pass_or_check:
# Pass PIN to method
msg = self.pin_func(pin, *self.pin_args)
self.pin_cancel()
return msg
else:
# Check PIN against device's internal PIN
if pin == self.device.pin:
msg = self.pin_func(*self.pin_args)
self.pin_cancel()
return msg
else:
time.sleep(3)
self.pin_cancel()
return proto.Failure(code=6, message="Invalid PIN")
def check(self, pin):
if self.pass_or_check:
# Pass PIN to method
msg = self.func(pin, *self.args)
self.cancel()
return msg
else:
# Check PIN against device's internal PIN
if pin == self.wallet.struct.pin:
msg = self.func(*self.args)
self.cancel()
return msg
else:
time.sleep(3)
self.cancel()
self.set_main_state()
return proto.Failure(code=6, message="Invalid PIN")
def protect_call(self, yesno_message, otp_message, pin_message, func,
*args):
if not self.yesno(yesno_message):
return proto.Failure(code=4, message='Action cancelled by user')
if self.device.otp:
if self.device.pin:
return self.otp_request(
otp_message, self.pin_request,
*[pin_message, False, func] + list(args))
else:
return self.otp_request(otp_message, func, *args)
if self.device.pin:
return self.pin_request(pin_message, False, func, *args)
return func(*args)
def process_message(self, msg):
if isinstance(msg, proto.SignTx):
# Start signing process
return self.sign_tx(msg)
if isinstance(msg, proto.TxInput):
return self.tx_input(msg)
if isinstance(msg, proto.TxOutput):
if self.ser_output:
# We just want to serialize part of output
# and send it back to computer
return self.serialize_output(msg)
else:
return self.tx_output(msg)
# return Failure message to indicate problems to upstream SM
return proto.Failure(code=1, message="Signing failed")
def resolve(self):
if not self.func:
# We're not waiting for hw buttons
return
if self.pending:
# We still didn't received ButtonAck from computer
return
if self.decision == None:
# We still don't know user's decision (call yesno_store() firstly)
return
if self.decision == True:
ret = self.func(*self.args)
else:
self.set_main_state()
ret = proto.Failure(code=4, message='Action cancelled by user')
self.func = None
self.args = []
return ret
def _check_output_index(self, msg):
if msg.index != self.output_index:
self.set_main_state()
return proto.Failure(
message="Output index doesn't correspond with internal state")
def _process_message(self, msg):
if isinstance(msg, proto.Initialize):
self.set_main_state()
m = self.wallet.get_features()
m.session_id = msg.session_id
return m
if self.otp.is_waiting():
'''OTP response is expected'''
if isinstance(msg, proto.OtpAck):
return self.otp.check(msg.otp)
if isinstance(msg, proto.OtpCancel):
self.otp.cancel()
return proto.Success(message="OTP cancelled")
self.set_main_state()
return proto.Failure(code=2, message='OTP expected')
if self.pin.is_waiting():
'''PIN response is expected'''
if isinstance(msg, proto.PinAck):
return self.pin.check(msg.pin)
if isinstance(msg, proto.PinCancel):
self.pin_cancel()
return proto.Success(message="PIN request cancelled")
self.set_main_state()
return proto.Failure(code=5, message='PIN expected')
if self.yesno.is_waiting():
'''Button confirmation is expected'''
if isinstance(msg, proto.ButtonAck):
self.yesno.allow()
return self.yesno.resolve() # Process if button has been already pressed
if isinstance(msg, proto.ButtonCancel):
self.set_main_state()
return proto.Success(message="Button confirmation cancelled")
self.set_main_state()
return proto.Failure(code=2, message='Button confirmation expected')
if isinstance(msg, proto.Ping):
return proto.Success(message=msg.message)
if isinstance(msg, proto.GetUUID):
return proto.UUID(UUID=self.wallet.get_UUID())
if isinstance(msg, proto.GetEntropy):
return self.protect_call(["Send %d bytes" % msg.size, "of entropy", "to computer?"],
'', '{ Cancel', 'Confirm }',
None, None,
self._get_entropy, msg.size)
if isinstance(msg, proto.GetMasterPublicKey):
return proto.MasterPublicKey(key=self.wallet.get_master_public_key())
if isinstance(msg, proto.GetAddress):
address = self.wallet.get_address(list(msg.address_n))
self.layout.show_receiving_address(address)
self.custom_message = True # Yes button will redraw screen
return proto.Address(address=address)
if isinstance(msg, proto.SetMaxFeeKb):
return self.protect_call(["Current maximal fee",
"is %s per kB." % self.wallet.maxfee_kb,
"Set transaction fee",
"to %s per kB?" % msg.maxfee_kb],
'', '{ Cancel', 'Confirm }',
None, None,
self._set_maxfee_kb, msg.maxfee_kb)
if isinstance(msg, proto.ResetDevice):
return self.protect_reset("Reset device?",
'', '{ Cancel', 'Confirm }', None,
msg.random)
if isinstance(msg, (proto.SignTx, proto.TxInput, proto.TxOutput)):
return self.signing.process_message(msg)
self.set_main_state()
return proto.Failure(code=1, message="Unexpected message")
def process_message(self, msg):
if isinstance(msg, proto.Initialize):
self.otp_cancel()
self.pin_cancel()
m = proto.Features()
m.session_id = msg.session_id
m.vendor = self.device.vendor
m.major_version = self.device.major_version
m.minor_version = self.device.minor_version
m.otp = self.device.otp == True
m.pin = self.device.pin != ''
m.spv = self.device.spv == True
m.algo.extend(self.device.algo)
m.maxfee_kb = self.device.maxfee_kb
m.debug_link = self.device.debug_link
return m
if self.otp != None:
'''OTP response is expected'''
if isinstance(msg, proto.OtpAck):
return self.otp_check(msg.otp)
if isinstance(msg, proto.OtpCancel):
self.otp_cancel()
return proto.Success(message="OTP cancelled")
return proto.Failure(code=2, message='Waiting for OTP')
if self.pin_func != None:
'''PIN response is expected'''
if isinstance(msg, proto.PinAck):
return self.pin_check(msg.pin)
if isinstance(msg, proto.PinCancel):
self.pin_cancel()
return proto.Success(message="PIN request cancelled")
return proto.Failure(code=5, message='Waiting for PIN')
if isinstance(msg, proto.Ping):
return proto.Success(message=msg.message)
if isinstance(msg, proto.GetUUID):
return proto.UUID(UUID='device-UUID')
if isinstance(msg, proto.GetEntropy):
return self.protect_call(
"Send %d bytes of entropy to computer?" % msg.size, None, None,
self._get_entropy, msg.size)
if isinstance(msg, proto.GetMasterPublicKey):
return proto.MasterPublicKey(
key=self.device.get_master_public_key(msg.algo))
if isinstance(msg, proto.SetMaxFeeKb):
return self.protect_call("Current maximal fee is %s per kB. Set transaction fee to %s per kilobyte?" % \
(self.device.maxfee_kb, msg.maxfee_kb),
None, None,
self._set_maxfee_kb, msg.maxfee_kb)
if isinstance(msg, proto.LoadDevice):
return self.protect_call("Load device with custom seed?", None,
None, self._load_device, msg.seed,
msg.otp, msg.pin, msg.spv)
if isinstance(msg, proto.ResetDevice):
return self.protect_call("Reset device?", None, None,
self._reset_device, msg.random)
if isinstance(msg, proto.SignTx):
print "<TODO: Print transaction details>"
return self.protect_call("Sign transaction?", None, None,
self._sign_tx, msg)
return proto.Failure(code=1, message='Unknown method')