import os import time import bitkey_pb2 as proto import random def show_message(message): print "MESSAGE FROM DEVICE:", message def show_input(input_text, message=None): if message: print "QUESTION FROM DEVICE:", message return raw_input(input_text) class CallException(Exception): pass class PinException(CallException): pass class OtpException(CallException): pass class BitkeyClient(object): def __init__(self, transport, debuglink=None, algo=proto.BIP32, message_func=show_message, input_func=show_input, debug=False): self.transport = transport self.debuglink = debuglink self.algo = algo self.message_func = message_func self.input_func = input_func self.debug = debug self.setup_debuglink() self.init_device() def _get_local_entropy(self): return os.urandom(32) def init_device(self): self.master_public_key = None self.session_id = ''.join([ chr(random.randrange(0, 255, 1)) for _ in xrange(0, 16) ]) self.features = self.call(proto.Initialize(session_id=self.session_id)) self.uuid = self.get_uuid() def get_master_public_key(self): if self.master_public_key: return self.master_public_key self.master_public_key = self.call(proto.GetMasterPublicKey(algo=self.algo)).key return self.master_public_key def get_address(self, n): return self.call(proto.GetAddress(algo=self.algo, address_n=n)).address def get_entropy(self, size): return self.call(proto.GetEntropy(size=size)).entropy def _pprint(self, msg): return "<%s>:\n%s" % (msg.__class__.__name__, msg) def setup_debuglink(self, button=None, pin_correct=False, otp_correct=False): self.debug_button = button self.debug_pin = pin_correct self.debug_otp = otp_correct def call(self, msg): if self.debug: print '----------------------' print "Sending", self._pprint(msg) self.transport.write(msg) resp = self.transport.read_blocking() if isinstance(resp, proto.ButtonRequest): if self.debuglink and self.debug_button: print "Pressing button", self.debug_button self.debuglink.press_button(self.debug_button) return self.call(proto.ButtonAck()) if isinstance(resp, proto.OtpRequest): if self.debuglink: otp = self.debuglink.read_otp() if self.debug_otp: msg2 = otp else: msg2 = proto.OtpAck(otp='__42__') else: otp = self.input_func("OTP required: ", resp.message) msg2 = proto.OtpAck(otp=otp) return self.call(msg2) if isinstance(resp, proto.PinRequest): if self.debuglink: pin = self.debuglink.read_pin() if self.debug_pin: msg2 = pin else: msg2 = proto.PinAck(pin='__42__') else: pin = self.input_func("PIN required: ", resp.message) msg2 = proto.PinAck(pin=pin) return self.call(msg2) if isinstance(resp, proto.Failure): self.message_func(resp.message) if resp.code == 3: raise OtpException("OTP is invalid") elif resp.code == 4: raise CallException("Action cancelled by user") elif resp.code == 6: raise PinException("PIN is invalid") raise CallException(resp.code, resp.message) if self.debug: print "Received", self._pprint(resp) return resp def get_uuid(self): return self.call(proto.GetUUID()).UUID def sign_tx(self, inputs, outputs): ''' inputs: list of TxInput outputs: list of TxOutput proto.TxInput(index=0, address_n=0, amount=0, prev_hash='', prev_index=0, #script_sig= ) proto.TxOutput(index=0, address='1Bitkey', #address_n=[], amount=100000000, script_type=proto.PAYTOADDRESS, #script_args= ) ''' start = time.time() # Prepare and send initial message tx = proto.SignTx() tx.algo = self.algo # Choose BIP32 or ELECTRUM way for deterministic keys tx.random = self._get_local_entropy() # Provide additional entropy to the device tx.inputs_count = len(inputs) tx.outputs_count = len(outputs) res = self.call(tx) # Prepare structure for signatures signatures = [None]*len(inputs) serialized_tx = '' counter = 0 while True: counter += 1 if isinstance(res, proto.Failure): raise CallException("Signing failed") if not isinstance(res, proto.TxRequest): raise CallException("Unexpected message") # If there's some part of signed transaction, let's add it if res.serialized_tx: print "!!! RECEIVED PART OF SERIALIED TX (%d BYTES)" % len(res.serialized_tx) serialized_tx += res.serialized_tx if res.signed_index >= 0 and res.signature: print "!!! SIGNED INPUT", res.signed_index signatures[res.signed_index] = res.signature if res.request_index < 0: # Device didn't ask for more information, finish workflow break # Device asked for one more information, let's process it. if res.request_type == proto.TXOUTPUT: res = self.call(outputs[res.request_index]) continue elif res.request_type == proto.TXINPUT: print "REQUESTING", res.request_index res = self.call(inputs[res.request_index]) continue print "SIGNED IN %.03f SECONDS, CALLED %d MESSAGES, %d BYTES" % \ (time.time() - start, counter, len(serialized_tx)) return (signatures, serialized_tx) #print "PBDATA", tx.SerializeToString().encode('hex') ################# ################# ################# ''' signatures = [('add550d6ba9ab7e01d37e17658f98b6e901208d241f24b08197b5e20dfa7f29f095ae01acbfa5c4281704a64053dcb80e9b089ecbe09f5871d67725803e36edd', '3045022100dced96eeb43836bc95676879eac303eabf39802e513f4379a517475c259da12502201fd36c90ecd91a32b2ca8fed2e1755a7f2a89c2d520eb0da10147802bc7ca217')] s_inputs = [] for i in range(len(inputs)): addr, v, p_hash, p_pos, p_scriptPubKey, _, _ = inputs[i] pubkey = signatures[i][0].decode('hex') sig = signatures[i][1].decode('hex') s_inputs.append((addr, v, p_hash, p_pos, p_scriptPubKey, pubkey, sig)) return s_inputs s_inputs = [] for i in range(len(inputs)): addr, v, p_hash, p_pos, p_scriptPubKey, _, _ = inputs[i] private_key = ecdsa.SigningKey.from_string( self.get_private_key(addr, password), curve = SECP256k1 ) public_key = private_key.get_verifying_key() pubkey = public_key.to_string() tx = filter( raw_tx( inputs, outputs, for_sig = i ) ) sig = private_key.sign_digest( Hash( tx.decode('hex') ), sigencode = ecdsa.util.sigencode_der ) assert public_key.verify_digest( sig, Hash( tx.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der) s_inputs.append( (addr, v, p_hash, p_pos, p_scriptPubKey, pubkey, sig) ) return s_inputs ''' def reset_device(self): # Begin with device reset workflow resp = self.call(proto.ResetDevice(random=self._get_local_entropy())) self.init_device() return isinstance(resp, proto.Success) def load_device(self, seed, otp, pin, spv): if not self.debuglink: raise Exception("DebugLink not available") if not self.debuglink.load_device(seed, otp, pin, spv): return False self.init_device() return True