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follow-up 0438bbc2c2

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the previous was quadratic in len(tx.inputs())
This commit is contained in:
SomberNight 2018-06-14 21:46:03 +02:00
parent 7ebff5616e
commit 8f7a4cf876
No known key found for this signature in database
GPG key ID: B33B5F232C6271E9
1 changed files with 28 additions and 17 deletions
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15
lib/transaction.py
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@ -652,12 +652,19 @@ class Transaction:
return pubkeys, x_pubkeys return pubkeys, x_pubkeys
def update_signatures(self, signatures: Sequence[str]): def update_signatures(self, signatures: Sequence[str]):
"""Add new signatures to a transaction""" """Add new signatures to a transaction
`signatures` is expected to be a list of sigs with signatures[i]
intended for self._inputs[i].
This is used by the Trezor and KeepKey plugins.
"""
if self.is_complete(): if self.is_complete():
return return
if len(self.inputs()) != len(signatures):
raise Exception('expected {} signatures; got {}'.format(len(self.inputs()), len(signatures)))
for i, txin in enumerate(self.inputs()): for i, txin in enumerate(self.inputs()):
pubkeys, x_pubkeys = self.get_sorted_pubkeys(txin) pubkeys, x_pubkeys = self.get_sorted_pubkeys(txin)
for sig in signatures: sig = signatures[i]
if sig in txin.get('signatures'): if sig in txin.get('signatures'):
continue continue
pre_hash = Hash(bfh(self.serialize_preimage(i))) pre_hash = Hash(bfh(self.serialize_preimage(i)))
@ -670,7 +677,11 @@ class Transaction:
continue continue
pubkey_hex = public_key.get_public_key_hex(compressed=True) pubkey_hex = public_key.get_public_key_hex(compressed=True)
if pubkey_hex in pubkeys: if pubkey_hex in pubkeys:
try:
public_key.verify_message_hash(sig_string, pre_hash) public_key.verify_message_hash(sig_string, pre_hash)
except Exception:
traceback.print_exc(file=sys.stderr)
continue
j = pubkeys.index(pubkey_hex) j = pubkeys.index(pubkey_hex)
print_error("adding sig", i, j, pubkey_hex, sig) print_error("adding sig", i, j, pubkey_hex, sig)
self.add_signature_to_txin(self._inputs[i], j, sig) self.add_signature_to_txin(self._inputs[i], j, sig)