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Code Issues Releases Wiki Activity

signing/multisig: fix signature order in input_script_multisig

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This commit is contained in:
Jan Pochyla 2018-02-24 18:18:29 +01:00
parent d6c0fae045
commit e9ae9e6f1e
2 changed files with 24 additions and 12 deletions
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23
src/apps/wallet/sign_tx/scripts.py
View File

@ -158,8 +158,9 @@ def get_p2wsh_witness(multisig: MultisigRedeemScriptType, signature: bytes, sign
for s in signatures:
append_signature(w, s, sighash) # size of the witness included
redeem_script = script_multisig(multisig_get_pubkeys(multisig), multisig.m)
# redeem script
pubkeys = multisig_get_pubkeys(multisig)
redeem_script = script_multisig(pubkeys, multisig.m)
write_varint(w, len(redeem_script))
write_bytes(w, redeem_script)
return w
@ -167,22 +168,28 @@ def get_p2wsh_witness(multisig: MultisigRedeemScriptType, signature: bytes, sign
# -------------------------- Multisig --------------------------
def input_script_multisig(current_signature, other_signatures, pubkeys, m: int, sighash: int):
def input_script_multisig(multisig: MultisigRedeemScriptType, signature: bytes, signature_index: int, sighash: int):
signatures = multisig.signatures # other signatures
if len(signatures[signature_index]) > 0:
raise ScriptsError('One of the multisig signatures occupies the current signature\'s spot')
signatures[signature_index] = signature # our signature
w = bytearray()
# starts with OP_FALSE because of an old OP_CHECKMULTISIG bug,
# which consumes one additional item on the stack
# see https://bitcoin.org/en/developer-guide#standard-transactions
w.append(0x00)
for s in other_signatures:
for s in signatures:
if len(s):
append_signature(w, s, sighash)
append_signature(w, current_signature, sighash)
# redeem script
redeem_script = script_multisig(pubkeys, m)
pubkeys = multisig_get_pubkeys(multisig)
redeem_script = script_multisig(pubkeys, multisig.m)
write_op_push(w, len(redeem_script))
write_bytes(w, script_multisig(pubkeys, m))
write_bytes(w, redeem_script)
return w

13
src/apps/wallet/sign_tx/signing.py
View File

@ -504,8 +504,9 @@ def input_derive_script(coin: CoinType, i: TxInputType, pubkey: bytes, signature
if i.script_type == InputScriptType.SPENDP2SHWITNESS: # p2wpkh or p2wsh using p2sh
if i.multisig: # p2wsh in p2sh
return input_script_p2wsh_in_p2sh(output_script_multisig_p2wsh(multisig_get_pubkeys(i.multisig),
i.multisig.m))
pubkeys = multisig_get_pubkeys(i.multisig)
script_hash = output_script_multisig_p2wsh(pubkeys, i.multisig.m)
return input_script_p2wsh_in_p2sh(script_hash)
# p2wpkh in p2sh
return input_script_p2wpkh_in_p2sh(ecdsa_hash_pubkey(pubkey))
@ -514,8 +515,12 @@ def input_derive_script(coin: CoinType, i: TxInputType, pubkey: bytes, signature
# multisig
elif i.script_type == InputScriptType.SPENDMULTISIG:
return input_script_multisig(signature, i.multisig.signatures, multisig_get_pubkeys(i.multisig), i.multisig.m,
get_hash_type(coin))
signature_index = multisig_pubkey_index(i.multisig, pubkey)
if signature_index is None:
raise SigningError(FailureType.DataError,
'Pubkey not found in multisig script')
return input_script_multisig(
i.multisig, signature, signature_index, get_hash_type(coin))
else:
raise SigningError(FailureType.ProcessError, 'Invalid script type')