def update_signatures(self, signatures):
"""Add new signatures to a transaction
`signatures` is expected to be a list of binary sigs with signatures[i]
intended for self._inputs[i], without the SIGHASH appended.
This is used by hardware device code.
"""
if self.is_complete():
return
if len(self.inputs()) != len(signatures):
raise RuntimeError('expected {} signatures; got {}'.format(
len(self.inputs()), len(signatures)))
for i, txin in enumerate(self.inputs()):
pubkeys, x_pubkeys = self.get_sorted_pubkeys(txin)
sig = bh2u(signatures[i] + bytes([self.nHashType() & 255]))
logger.warning(f'Signature {i}: {sig}')
if sig in txin.get('signatures'):
continue
pre_hash = self.preimage_hash(i)
rec_sig_base = der_signature_to_compact(signatures[i])
for recid in range(4):
rec_sig = rec_sig_base + bytes([recid])
try:
public_key = PublicKey.from_recoverable_signature(
rec_sig, pre_hash, None)
except (InvalidSignatureError, ValueError):
# the point might not be on the curve for some recid values
continue
# public key is compressed
pubkey_hex = public_key.to_hex()
if pubkey_hex in pubkeys:
try:
public_key.verify_recoverable_signature(
rec_sig, pre_hash, None)
except Exception:
logger.exception('')
continue
j = pubkeys.index(pubkey_hex)
logger.debug(f'adding sig {i} {j} {pubkey_hex} {sig}')
self.add_signature_to_txin(i, j, sig)
break
# redo raw
self.raw = self.serialize()
def update_signatures(self, signatures):
"""Add new signatures to a transaction
`signatures` is expected to be a list of binary sigs with signatures[i]
intended for self.inputs[i], without the SIGHASH appended.
This is used by hardware device code.
"""
if self.is_complete():
return
if len(self.inputs) != len(signatures):
raise RuntimeError('expected {} signatures; got {}'.format(
len(self.inputs), len(signatures)))
for txin, signature in zip(self.inputs, signatures):
full_sig = signature + bytes([self.nHashType()])
logger.warning(f'Signature: {full_sig.hex()}')
if full_sig in txin.signatures:
continue
pubkeys = [x_pubkey.to_public_key() for x_pubkey in txin.x_pubkeys]
pre_hash = self.preimage_hash(txin)
rec_sig_base = der_signature_to_compact(signature)
for recid in range(4):
rec_sig = rec_sig_base + bytes([recid])
try:
public_key = PublicKey.from_recoverable_signature(
rec_sig, pre_hash, None)
except (InvalidSignatureError, ValueError):
# the point might not be on the curve for some recid values
continue
if public_key in pubkeys:
try:
public_key.verify_recoverable_signature(
rec_sig, pre_hash, None)
except Exception:
logger.exception('')
continue
j = pubkeys.index(public_key)
logger.debug(f'adding sig {j} {public_key} {full_sig}')
txin.signatures[j] = full_sig
break
def sign_transaction(self, tx: Transaction, password: str) -> None:
if tx.is_complete():
return
try:
p2pkhTransaction = True
inputhasharray = []
hasharray = []
pubkeyarray = []
# Build hasharray from inputs
for txin in tx.inputs:
if txin.type() != ScriptType.P2PKH:
p2pkhTransaction = False
for x_pubkey in txin.x_pubkeys:
if self.is_signature_candidate(x_pubkey):
key_derivation = x_pubkey.bip32_path()
assert len(key_derivation) == 2
inputPath = "%s/%d/%d" % (self.get_derivation(),
*key_derivation)
inputHash = tx.preimage_hash(txin)
hasharray_i = {
'hash': inputHash.hex(),
'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 annotated change outputs.
# The user is on their own if they have unannotated non-change self-outputs.
for txout in tx.outputs:
if txout.x_pubkeys:
for xpubkey in [
xpk for xpk in txout.x_pubkeys
if self.is_signature_candidate(xpk)
]:
key_path_text = compose_chain_string(
xpubkey.derivation_path())[1:]
changePath = self.get_derivation(
) + key_path_text # "/1/0", no "m"
pubkeyarray.append({
'pubkey':
xpubkey.to_public_key().to_hex(),
'keypath':
changePath,
})
# 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):
type_ = txin.type()
if type_ == ScriptType.P2PKH:
return Transaction.get_preimage_script(txin)
if type_ == ScriptType.MULTISIG_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 RuntimeError(f'unsupported type {type_}')
tx_dbb_serialized = CustomTXSerialization.from_hex(
tx.serialize()).serialize()
else:
# We only need this for the signing echo / verification.
tx_dbb_serialized = None
# Build sign command
dbb_signatures: List[Dict[str, Any]] = []
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_data: Dict[str, Any] = {
"sign": {
"data": hashes,
"checkpub": pubkeyarray,
},
}
if tx_dbb_serialized is not None:
msg_data["sign"]["meta"] = sha256d(tx_dbb_serialized).hex()
msg = json.dumps(msg_data).encode('ascii')
assert self.plugin is not None
dbb_client: DigitalBitbox_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 RuntimeError("Incorrect number of transactions signed")
for txin, siginfo, pre_hash in zip(tx.inputs, dbb_signatures,
inputhasharray):
if txin.is_complete():
continue
for pubkey_index, x_pubkey in enumerate(txin.x_pubkeys):
compact_sig = bytes.fromhex(siginfo['sig'])
if 'recid' in siginfo:
# firmware > v2.1.1
recid = int(siginfo['recid'], 16)
recoverable_sig = compact_sig + bytes([recid])
pk = PublicKey.from_recoverable_signature(
recoverable_sig, pre_hash, None)
elif 'pubkey' in siginfo:
# firmware <= v2.1.1
pk = PublicKey.from_hex(siginfo['pubkey'])
if pk != x_pubkey.to_public_key():
continue
full_sig = (compact_signature_to_der(compact_sig) +
bytes([Transaction.nHashType() & 255]))
txin.signatures[pubkey_index] = full_sig
except UserCancelled:
raise
except Exception as e:
self.give_error(e, True)
else:
logger.debug("Transaction is_complete %s", tx.is_complete())
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(bytes.fromhex(tx.serialize_preimage(i)))
hasharray_i = {'hash': inputHash.hex(), '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 _type, address, amount in tx.outputs():
assert _type == TYPE_ADDRESS
info = tx.output_info.get(address)
if info is not None:
index, xpubs, m = info
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()
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"] = sha256d(tx_dbb_serialized).hex()
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 = [sig for sig in txin['signatures'] if sig]
if len(signatures) == num:
break # txin is complete
ii = txin['pubkeys'].index(pubkey)
siginfo = dbb_signatures[i]
compact_sig = bytes.fromhex(siginfo['sig'])
if 'recid' in siginfo:
# firmware > v2.1.1
recid = int(siginfo['recid'], 16)
recoverable_sig = compact_sig + bytes([recid])
h = inputhasharray[i]
pk = PublicKey.from_recoverable_signature(recoverable_sig, h, None)
pk = pk.to_hex(compressed=True)
elif 'pubkey' in siginfo:
# firmware <= v2.1.1
pk = siginfo['pubkey']
if pk != pubkey:
continue
sig = (compact_signature_to_der(compact_sig) +
bytes([Transaction.nHashType() & 255]))
tx.add_signature_to_txin(i, ii, sig.hex())
except UserCancelled:
raise
except Exception as e:
self.give_error(e, True)
else:
logger.debug("Transaction is_complete %s", tx.is_complete())
tx.raw = tx.serialize()
