def sign_transaction(self, tx, password): if tx.is_complete(): return try: p2pkhTransaction = True derivations = self.get_tx_derivations(tx) inputhasharray = [] hasharray = [] pubkeyarray = [] # Build hasharray from inputs for i, txin in enumerate(tx.inputs()): if txin['type'] == 'coinbase': self.give_error( "Coinbase not supported") # should never happen if txin['type'] != 'p2pkh': p2pkhTransaction = False for x_pubkey in txin['x_pubkeys']: if x_pubkey in derivations: index = derivations.get(x_pubkey) inputPath = "%s/%d/%d" % (self.get_derivation(), index[0], index[1]) inputHash = sha256d( binascii.unhexlify(tx.serialize_preimage(i))) hasharray_i = { 'hash': to_hexstr(inputHash), 'keypath': inputPath } hasharray.append(hasharray_i) inputhasharray.append(inputHash) break else: self.give_error("No matching x_key for sign_transaction" ) # should never happen # Build pubkeyarray from outputs for o in tx.outputs(): assert o.type == TYPE_ADDRESS info = tx.output_info.get(o.address) if info is not None: if info.is_change: index = info.address_index changePath = self.get_derivation() + "/%d/%d" % index changePubkey = self.derive_pubkey(index[0], index[1]) pubkeyarray_i = { 'pubkey': changePubkey, 'keypath': changePath } pubkeyarray.append(pubkeyarray_i) # Special serialization of the unsigned transaction for # the mobile verification app. # At the moment, verification only works for p2pkh transactions. if p2pkhTransaction: class CustomTXSerialization(Transaction): @classmethod def input_script(self, txin, estimate_size=False): if txin['type'] == 'p2pkh': return Transaction.get_preimage_script(txin) if txin['type'] == 'p2sh': # Multisig verification has partial support, but is disabled. This is the # expected serialization though, so we leave it here until we activate it. return '00' + push_script( Transaction.get_preimage_script(txin)) raise Exception("unsupported type %s" % txin['type']) tx_dbb_serialized = CustomTXSerialization( tx.serialize()).serialize_to_network() else: # We only need this for the signing echo / verification. tx_dbb_serialized = None # Build sign command dbb_signatures = [] steps = math.ceil(1.0 * len(hasharray) / self.maxInputs) for step in range(int(steps)): hashes = hasharray[step * self.maxInputs:(step + 1) * self.maxInputs] msg = { "sign": { "data": hashes, "checkpub": pubkeyarray, }, } if tx_dbb_serialized is not None: msg["sign"]["meta"] = to_hexstr(sha256d(tx_dbb_serialized)) msg = json.dumps(msg).encode('ascii') dbb_client = self.plugin.get_client(self) if not dbb_client.is_paired(): raise Exception("Could not sign transaction.") reply = dbb_client.hid_send_encrypt(msg) if 'error' in reply: raise Exception(reply['error']['message']) if 'echo' not in reply: raise Exception("Could not sign transaction.") if self.plugin.is_mobile_paired( ) and tx_dbb_serialized is not None: reply['tx'] = tx_dbb_serialized self.plugin.comserver_post_notification(reply) if steps > 1: self.handler.show_message( _("Signing large transaction. Please be patient ...") + "\n\n" + _("To continue, touch the Digital Bitbox's blinking light for 3 seconds." ) + " " + _("(Touch {} of {})").format((step + 1), steps) + "\n\n" + _("To cancel, briefly touch the blinking light or wait for the timeout." ) + "\n\n") else: self.handler.show_message( _("Signing transaction...") + "\n\n" + _("To continue, touch the Digital Bitbox's blinking light for 3 seconds." ) + "\n\n" + _("To cancel, briefly touch the blinking light or wait for the timeout." )) # Send twice, first returns an echo for smart verification reply = dbb_client.hid_send_encrypt(msg) self.handler.finished() if 'error' in reply: if reply["error"].get('code') in (600, 601): # aborted via LED short touch or timeout raise UserCancelled() raise Exception(reply['error']['message']) if 'sign' not in reply: raise Exception("Could not sign transaction.") dbb_signatures.extend(reply['sign']) # Fill signatures if len(dbb_signatures) != len(tx.inputs()): raise Exception("Incorrect number of transactions signed." ) # Should never occur for i, txin in enumerate(tx.inputs()): num = txin['num_sig'] for pubkey in txin['pubkeys']: signatures = list(filter(None, txin['signatures'])) if len(signatures) == num: break # txin is complete ii = txin['pubkeys'].index(pubkey) signed = dbb_signatures[i] if 'recid' in signed: # firmware > v2.1.1 recid = int(signed['recid'], 16) s = binascii.unhexlify(signed['sig']) h = inputhasharray[i] pk = ecc.ECPubkey.from_sig_string(s, recid, h) pk = pk.get_public_key_hex(compressed=True) elif 'pubkey' in signed: # firmware <= v2.1.1 pk = signed['pubkey'] if pk != pubkey: continue sig_r = int(signed['sig'][:64], 16) sig_s = int(signed['sig'][64:], 16) sig = ecc.der_sig_from_r_and_s(sig_r, sig_s) sig = to_hexstr(sig) + '01' tx.add_signature_to_txin(i, ii, sig) except UserCancelled: raise except BaseException as e: self.give_error(e, True) else: _logger.info("Transaction is_complete {tx.is_complete()}") tx.raw = tx.serialize()
def sign_transaction(self, tx, password): if tx.is_complete(): return try: p2pkhTransaction = True inputhasharray = [] hasharray = [] pubkeyarray = [] # Build hasharray from inputs for i, txin in enumerate(tx.inputs()): if txin.is_coinbase_input(): self.give_error("Coinbase not supported") # should never happen if txin.script_type != 'p2pkh': p2pkhTransaction = False my_pubkey, inputPath = self.find_my_pubkey_in_txinout(txin) if not inputPath: self.give_error("No matching pubkey for sign_transaction") # should never happen inputPath = convert_bip32_intpath_to_strpath(inputPath) inputHash = sha256d(bfh(tx.serialize_preimage(i))) hasharray_i = {'hash': to_hexstr(inputHash), 'keypath': inputPath} hasharray.append(hasharray_i) inputhasharray.append(inputHash) # Build pubkeyarray from outputs for txout in tx.outputs(): assert txout.address if txout.is_change: changePubkey, changePath = self.find_my_pubkey_in_txinout(txout) assert changePath changePath = convert_bip32_intpath_to_strpath(changePath) changePubkey = changePubkey.hex() pubkeyarray_i = {'pubkey': changePubkey, 'keypath': changePath} pubkeyarray.append(pubkeyarray_i) # Special serialization of the unsigned transaction for # the mobile verification app. # At the moment, verification only works for p2pkh transactions. if p2pkhTransaction: tx_copy = copy.deepcopy(tx) # monkey-patch method of tx_copy instance to change serialization def input_script(self, txin: PartialTxInput, *, estimate_size=False): if txin.script_type == 'p2pkh': return Transaction.get_preimage_script(txin) raise Exception("unsupported type %s" % txin.script_type) tx_copy.input_script = input_script.__get__(tx_copy, PartialTransaction) tx_dbb_serialized = tx_copy.serialize_to_network() else: # We only need this for the signing echo / verification. tx_dbb_serialized = None # Build sign command dbb_signatures = [] steps = math.ceil(1.0 * len(hasharray) / self.maxInputs) for step in range(int(steps)): hashes = hasharray[step * self.maxInputs : (step + 1) * self.maxInputs] msg = { "sign": { "data": hashes, "checkpub": pubkeyarray, }, } if tx_dbb_serialized is not None: msg["sign"]["meta"] = to_hexstr(sha256d(tx_dbb_serialized)) msg = json.dumps(msg).encode('ascii') dbb_client = self.plugin.get_client(self) if not dbb_client.is_paired(): raise Exception("Could not sign transaction.") reply = dbb_client.hid_send_encrypt(msg) if 'error' in reply: raise Exception(reply['error']['message']) if 'echo' not in reply: raise Exception("Could not sign transaction.") if self.plugin.is_mobile_paired() and tx_dbb_serialized is not None: reply['tx'] = tx_dbb_serialized self.plugin.comserver_post_notification(reply) if steps > 1: self.handler.show_message(_("Signing large transaction. Please be patient ...") + "\n\n" + _("To continue, touch the Digital Bitbox's blinking light for 3 seconds.") + " " + _("(Touch {} of {})").format((step + 1), steps) + "\n\n" + _("To cancel, briefly touch the blinking light or wait for the timeout.") + "\n\n") else: self.handler.show_message(_("Signing transaction...") + "\n\n" + _("To continue, touch the Digital Bitbox's blinking light for 3 seconds.") + "\n\n" + _("To cancel, briefly touch the blinking light or wait for the timeout.")) # Send twice, first returns an echo for smart verification reply = dbb_client.hid_send_encrypt(msg) self.handler.finished() if 'error' in reply: if reply["error"].get('code') in (600, 601): # aborted via LED short touch or timeout raise UserCancelled() raise Exception(reply['error']['message']) if 'sign' not in reply: raise Exception("Could not sign transaction.") dbb_signatures.extend(reply['sign']) # Fill signatures if len(dbb_signatures) != len(tx.inputs()): raise Exception("Incorrect number of transactions signed.") # Should never occur for i, txin in enumerate(tx.inputs()): for pubkey_bytes in txin.pubkeys: if txin.is_complete(): break signed = dbb_signatures[i] if 'recid' in signed: # firmware > v2.1.1 recid = int(signed['recid'], 16) s = binascii.unhexlify(signed['sig']) h = inputhasharray[i] pk = ecc.ECPubkey.from_sig_string(s, recid, h) pk = pk.get_public_key_hex(compressed=True) elif 'pubkey' in signed: # firmware <= v2.1.1 pk = signed['pubkey'] if pk != pubkey_bytes.hex(): continue sig_r = int(signed['sig'][:64], 16) sig_s = int(signed['sig'][64:], 16) sig = ecc.der_sig_from_r_and_s(sig_r, sig_s) sig = to_hexstr(sig) + '01' tx.add_signature_to_txin(txin_idx=i, signing_pubkey=pubkey_bytes.hex(), sig=sig) except UserCancelled: raise except BaseException as e: self.give_error(e, True) else: _logger.info(f"Transaction is_complete {tx.is_complete()}")