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electrum-bitcoinprivate
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choose_tx_from account, and use deterministic signatures (issue #323)

This commit is contained in:
ThomasV 2013-10-05 21:15:48 +02:00
parent 3a894725ae
commit f14d055ad8
5 changed files with 23 additions and 25 deletions
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6
gui/qt/main_window.py
View File

@ -794,7 +794,7 @@ class ElectrumWindow(QMainWindow):
if self.amount_e.is_shortcut:
self.amount_e.is_shortcut = False
c, u = self.wallet.get_account_balance(self.current_account)
inputs, total, fee = self.wallet.choose_tx_inputs( c + u, 0, self.current_account)
inputs, total, fee = self.wallet.choose_tx_inputs_from_account( c + u, 0, self.current_account)
fee = self.wallet.estimated_fee(inputs)
amount = c + u - fee
self.amount_e.setText( self.format_amount(amount) )
@ -807,7 +807,7 @@ class ElectrumWindow(QMainWindow):
if not is_fee: fee = None
if amount is None:
return
inputs, total, fee = self.wallet.choose_tx_inputs( amount, fee, self.current_account )
inputs, total, fee = self.wallet.choose_tx_inputs_from_account( amount, fee, self.current_account )
if not is_fee:
self.fee_e.setText( self.format_amount( fee ) )
if inputs:
@ -1676,7 +1676,7 @@ class ElectrumWindow(QMainWindow):
def do_verify():
message = unicode(verify_message.toPlainText())
message = message.encode('utf-8')
if self.wallet.verify_message(verify_address.text(), str(verify_signature.toPlainText()), message):
if bitcoin.verify_message(verify_address.text(), str(verify_signature.toPlainText()), message):
self.show_message(_("Signature verified"))
else:
self.show_message(_("Error: wrong signature"))

25
lib/bitcoin.py
View File

@ -272,18 +272,9 @@ def is_valid(addr):
########### end pywallet functions #######################
# secp256k1, http://www.oid-info.com/get/1.3.132.0.10
_p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2FL
_r = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141L
_b = 0x0000000000000000000000000000000000000000000000000000000000000007L
_a = 0x0000000000000000000000000000000000000000000000000000000000000000L
_Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798L
_Gy = 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8L
curve_secp256k1 = ecdsa.ellipticcurve.CurveFp( _p, _a, _b )
generator_secp256k1 = ecdsa.ellipticcurve.Point( curve_secp256k1, _Gx, _Gy, _r )
oid_secp256k1 = (1,3,132,0,10)
SECP256k1 = ecdsa.curves.Curve("SECP256k1", curve_secp256k1, generator_secp256k1, oid_secp256k1 )
from ecdsa.ecdsa import curve_secp256k1, generator_secp256k1
from ecdsa.curves import SECP256k1
from ecdsa.util import string_to_number, number_to_string
def msg_magic(message):
@ -293,6 +284,16 @@ def msg_magic(message):
return "\x18Bitcoin Signed Message:\n" + encoded_varint + message
def verify_message(address, signature, message):
try:
EC_KEY.verify_message(address, signature, message)
return True
except BaseException as e:
print_error("Verification error: {0}".format(e))
return False
class EC_KEY(object):
def __init__( self, secret ):
self.pubkey = ecdsa.ecdsa.Public_key( generator_secp256k1, generator_secp256k1 * secret )
@ -302,7 +303,7 @@ class EC_KEY(object):
def sign_message(self, message, compressed, address):
private_key = ecdsa.SigningKey.from_secret_exponent( self.secret, curve = SECP256k1 )
public_key = private_key.get_verifying_key()
signature = private_key.sign_digest( Hash( msg_magic(message) ), sigencode = ecdsa.util.sigencode_string )
signature = private_key.sign_digest_deterministic( Hash( msg_magic(message) ), hashfunc=hashlib.sha256, sigencode = ecdsa.util.sigencode_string )
assert public_key.verify_digest( signature, Hash( msg_magic(message) ), sigdecode = ecdsa.util.sigdecode_string)
for i in range(4):
sig = base64.b64encode( chr(27 + i + (4 if compressed else 0)) + signature )

2
lib/commands.py
View File

@ -233,7 +233,7 @@ class Commands:
def verifymessage(self, address, signature, message):
return self.wallet.verify_message(address, signature, message)
return bitcoin.verify_message(address, signature, message)
def _mktx(self, outputs, fee = None, change_addr = None, domain = None):

2
lib/transaction.py
View File

@ -524,7 +524,7 @@ class Transaction:
secexp = pkey.secret
private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
public_key = private_key.get_verifying_key()
sig = private_key.sign_digest( Hash( tx_for_sig.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
sig = private_key.sign_digest_deterministic( Hash( tx_for_sig.decode('hex') ), hashfunc=hashlib.sha256, sigencode = ecdsa.util.sigencode_der )
assert public_key.verify_digest( sig, Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
signatures.append( sig.encode('hex') )
print_error("adding signature for", pubkey)

13
lib/wallet.py
View File

@ -673,14 +673,6 @@ class Wallet:
compressed = is_compressed(sec)
return key.sign_message(message, compressed, address)
def verify_message(self, address, signature, message):
try:
EC_KEY.verify_message(address, signature, message)
return True
except BaseException as e:
print_error("Verification error: {0}".format(e))
return False
def change_gap_limit(self, value):
if value >= self.gap_limit:
@ -1005,6 +997,11 @@ class Wallet:
def choose_tx_inputs_from_account( self, amount, fixed_fee, account ):
domain = self.get_account_addresses(account) if account else None
return self.choose_tx_inputs( amount, fixed_fee, domain )
def choose_tx_inputs( self, amount, fixed_fee, domain = None ):
""" todo: minimize tx size """
total = 0