tFix can_sign and cold storage - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
DIR Log
DIR Files
DIR Refs
DIR Submodules
---
DIR commit b1b15f510cc1496a765ac75cafdccef4d2af2c94
DIR parent abeb7818792b24aa029bc0572abfbea8cb8210c9
HTML Author: ThomasV <thomasv@electrum.org>
Date: Thu, 1 Sep 2016 13:52:49 +0200
Fix can_sign and cold storage
Diffstat:
M lib/keystore.py | 87 ++++++++++++++++++++-----------
M lib/wallet.py | 28 +++++++---------------------
2 files changed, 64 insertions(+), 51 deletions(-)
---
DIR diff --git a/lib/keystore.py b/lib/keystore.py
t@@ -49,6 +49,32 @@ class KeyStore(PrintError):
def can_import(self):
return False
+ def get_tx_derivations(self, tx):
+ keypairs = {}
+ for txin in tx.inputs():
+ num_sig = txin.get('num_sig')
+ if num_sig is None:
+ continue
+ x_signatures = txin['signatures']
+ signatures = filter(None, x_signatures)
+ if len(signatures) == num_sig:
+ # input is complete
+ continue
+ for k, x_pubkey in enumerate(txin['x_pubkeys']):
+ if x_signatures[k] is not None:
+ # this pubkey already signed
+ continue
+ derivation = self.get_pubkey_derivation(x_pubkey)
+ if not derivation:
+ continue
+ keypairs[x_pubkey] = derivation
+ return keypairs
+
+ def can_sign(self, tx):
+ if self.is_watching_only():
+ return False
+ return bool(self.get_tx_derivations(tx))
+
class Software_KeyStore(KeyStore):
t@@ -70,32 +96,15 @@ class Software_KeyStore(KeyStore):
decrypted = ec.decrypt_message(message)
return decrypted
- def get_keypairs_for_sig(self, tx, password):
- keypairs = {}
- for txin in tx.inputs():
- num_sig = txin.get('num_sig')
- if num_sig is None:
- continue
- x_signatures = txin['signatures']
- signatures = filter(None, x_signatures)
- if len(signatures) == num_sig:
- # input is complete
- continue
- for k, x_pubkey in enumerate(txin['x_pubkeys']):
- if x_signatures[k] is not None:
- # this pubkey already signed
- continue
- derivation = txin['derivation']
- sec = self.get_private_key(derivation, password)
- if sec:
- keypairs[x_pubkey] = sec
- return keypairs
-
def sign_transaction(self, tx, password):
+ if self.is_watching_only():
+ return
# Raise if password is not correct.
self.check_password(password)
# Add private keys
- keypairs = self.get_keypairs_for_sig(tx, password)
+ keypairs = self.get_tx_derivations(tx)
+ for k, v in keypairs.items():
+ keypairs[k] = self.get_private_key(v, password)
# Sign
if keypairs:
tx.sign(keypairs)
t@@ -157,13 +166,19 @@ class Imported_KeyStore(Software_KeyStore):
def get_private_key(self, sequence, password):
for_change, i = sequence
assert for_change == 0
- pubkey = (self.change_pubkeys if for_change else self.receiving_pubkeys)[i]
+ pubkey = self.receiving_pubkeys[i]
pk = pw_decode(self.keypairs[pubkey], password)
# this checks the password
if pubkey != public_key_from_private_key(pk):
raise InvalidPassword()
return pk
+ def get_pubkey_derivation(self, pubkey):
+ if pubkey not in self.receiving_keys:
+ return
+ i = self.receiving_keys.index(pubkey)
+ return (False, i)
+
def update_password(self, old_password, new_password):
if old_password is not None:
self.check_password(old_password)
t@@ -255,6 +270,14 @@ class Xpub:
assert len(s) == 2
return xkey, s
+ def get_pubkey_derivation(self, x_pubkey):
+ if x_pubkey[0:2] != 'ff':
+ return
+ xpub, derivation = self.parse_xpubkey(x_pubkey)
+ if self.xpub != xpub:
+ return
+ return derivation
+
class BIP32_KeyStore(Deterministic_KeyStore, Xpub):
t@@ -301,7 +324,6 @@ class BIP32_KeyStore(Deterministic_KeyStore, Xpub):
def is_watching_only(self):
return self.xprv is None
-
def get_mnemonic(self, password):
return self.get_seed(password)
t@@ -314,9 +336,6 @@ class BIP32_KeyStore(Deterministic_KeyStore, Xpub):
xprv, xpub = bip32_private_derivation(xprv, "m/", derivation)
self.add_xprv(xprv)
- def can_sign(self, xpub):
- return xpub == self.xpub and self.xprv is not None
-
def get_private_key(self, sequence, password):
xprv = self.get_master_private_key(password)
_, _, _, c, k = deserialize_xkey(xprv)
t@@ -324,6 +343,7 @@ class BIP32_KeyStore(Deterministic_KeyStore, Xpub):
return pk
+
class Old_KeyStore(Deterministic_KeyStore):
def __init__(self, d):
t@@ -430,8 +450,7 @@ class Old_KeyStore(Deterministic_KeyStore):
def get_xpubkey(self, for_change, n):
s = ''.join(map(lambda x: bitcoin.int_to_hex(x,2), (for_change, n)))
- x_pubkey = 'fe' + self.mpk + s
- return x_pubkey
+ return 'fe' + self.mpk + s
@classmethod
def parse_xpubkey(self, x_pubkey):
t@@ -447,6 +466,14 @@ class Old_KeyStore(Deterministic_KeyStore):
assert len(s) == 2
return mpk, s
+ def get_pubkey_derivation(self, x_pubkey):
+ if x_pubkey[0:2] != 'fe':
+ return
+ mpk, derivation = self.parse_xpubkey(x_pubkey)
+ if self.mpk != mpk:
+ return
+ return derivation
+
def update_password(self, old_password, new_password):
if old_password is not None:
self.check_password(old_password)
t@@ -550,7 +577,7 @@ def xpubkey_to_address(x_pubkey):
pubkey = BIP32_KeyStore.derive_pubkey_from_xpub(xpub, s[0], s[1])
elif x_pubkey[0:2] == 'fe':
mpk, s = Old_KeyStore.parse_xpubkey(x_pubkey)
- pubkey = Old_KeyStore.get_pubkey_from_mpk(mpk.decode('hex'), s[0], s[1])
+ pubkey = Old_KeyStore.get_pubkey_from_mpk(mpk, s[0], s[1])
elif x_pubkey[0:2] == 'fd':
addrtype = ord(x_pubkey[2:4].decode('hex'))
hash160 = x_pubkey[4:].decode('hex')
DIR diff --git a/lib/wallet.py b/lib/wallet.py
t@@ -981,28 +981,21 @@ class Abstract_Wallet(PrintError):
address = txin['address']
if self.is_mine(address):
self.add_input_sig_info(txin, address)
- else:
- txin['can_sign'] = False
def can_sign(self, tx):
- if self.is_watching_only():
- return False
if tx.is_complete():
return False
- ## add input info. (should be done already)
- #for txin in tx.inputs():
- # self.add_input_info(txin)
- can_sign = any([txin['can_sign'] for txin in tx.inputs()])
- return can_sign
+ for k in self.get_keystores():
+ if k.can_sign(tx):
+ return True
def get_input_tx(self, tx_hash):
# First look up an input transaction in the wallet where it
# will likely be. If co-signing a transaction it may not have
# all the input txs, in which case we ask the network.
tx = self.transactions.get(tx_hash)
- if not tx:
+ if not tx and self.network:
request = ('blockchain.transaction.get', [tx_hash])
- # FIXME: what if offline?
tx = Transaction(self.network.synchronous_get(request))
return tx
t@@ -1014,7 +1007,6 @@ class Abstract_Wallet(PrintError):
for txin in tx.inputs():
tx_hash = txin['prevout_hash']
txin['prev_tx'] = self.get_input_tx(tx_hash)
- # I should add the address index if it's an address of mine
# add output info for hw wallets
tx.output_info = []
t@@ -1024,12 +1016,9 @@ class Abstract_Wallet(PrintError):
tx.output_info.append((change, address_index))
# sign
- for keystore in self.get_keystores():
- if not keystore.is_watching_only():
- try:
- keystore.sign_transaction(tx, password)
- except:
- print "keystore cannot sign", keystore
+ for k in self.get_keystores():
+ k.sign_transaction(tx, password)
+
def get_unused_addresses(self):
# fixme: use slots from expired requests
t@@ -1270,7 +1259,6 @@ class P2PK_Wallet(Abstract_Wallet):
txin['signatures'] = [None]
txin['redeemPubkey'] = pubkey
txin['num_sig'] = 1
- txin['can_sign'] = any([x is None for x in txin['signatures']])
def sign_message(self, address, message, password):
sequence = self.get_address_index(address)
t@@ -1534,8 +1522,6 @@ class Multisig_Wallet(Deterministic_Wallet):
txin['signatures'] = [None] * len(pubkeys)
txin['redeemScript'] = self.redeem_script(*derivation)
txin['num_sig'] = self.m
- txin['can_sign'] = any([x is None for x in txin['signatures']])
-
wallet_types = ['standard', 'multisig', 'imported']