def ecdsa_recover(message, signature):
assert len(signature) == 65
pub = ecdsa_raw_recover(message, _decode_sig(signature))
assert pub, 'pubkey could not be recovered'
pub = bitcoin.encode_pubkey(pub, 'bin_electrum')
assert len(pub) == 64
return pub
def ecdsa_recover(message, signature):
assert len(signature) == 65
pub = ecdsa_raw_recover(message, _decode_sig(signature))
assert pub, 'pubkey could not be recovered'
pub = bitcoin.encode_pubkey(pub, 'bin_electrum')
assert len(pub) == 64
return pub
def recover_sender(self):
if self.v:
if self.r >= N or self.s >= P or self.v < 27 or self.v > 28 \
or self.r == 0 or self.s == 0:
raise InvalidSignature()
rlpdata = rlp.encode(self, self.__class__.exclude(['v', 'r', 's']))
rawhash = sha3(rlpdata)
pub = ecdsa_raw_recover(rawhash, (self.v, self.r, self.s))
if pub is False or pub == (0, 0):
raise InvalidSignature()
pub = encode_pubkey(pub, 'bin')
return sha3(pub[1:])[-20:]
def sender(self):
if not self._sender:
# Determine sender
if self.v:
if self.r >= N or self.s >= P or self.v < 27 or self.v > 28:
raise InvalidTransaction("Invalid signature values!")
log.debug('recovering sender')
rlpdata = rlp.encode(self, UnsignedTransaction)
rawhash = utils.sha3(rlpdata)
pub = encode_pubkey(ecdsa_raw_recover(rawhash, (self.v, self.r, self.s)), 'bin')
self._sender = utils.sha3(pub[1:])[-20:]
assert self.sender == self._sender
else:
self._sender = 0
return self._sender
def sender(self):
if not self._sender:
# Determine sender
if self.v:
if self.r >= N or self.s >= P or self.v < 27 or self.v > 28:
raise InvalidTransaction("Invalid signature values!")
log.debug('recovering sender')
rlpdata = rlp.encode(self, UnsignedTransaction)
rawhash = utils.sha3(rlpdata)
pub = encode_pubkey(
ecdsa_raw_recover(rawhash, (self.v, self.r, self.s)),
'bin')
self._sender = utils.sha3(pub[1:])[-20:]
assert self.sender == self._sender
else:
self._sender = 0
return self._sender
def sender(self):
if not self._sender:
# Determine sender
if self.v:
if self.r >= N or self.s >= P or self.v < 27 or self.v > 28 or self.r == 0 or self.s == 0:
raise InvalidTransaction("Invalid signature values!")
log.debug('recovering sender')
rlpdata = rlp.encode(self, UnsignedTransaction)
rawhash = utils.sha3(rlpdata)
pub = ecdsa_raw_recover(rawhash, (self.v, self.r, self.s))
if pub is False:
raise InvalidTransaction("Invalid signature values (x^3+7 is non-residue)")
if pub == (0, 0):
raise InvalidTransaction("Invalid signature (zero privkey cannot sign)")
pub = encode_pubkey(pub, 'bin')
self._sender = utils.sha3(pub[1:])[-20:]
assert self.sender == self._sender
else:
self._sender = 0
return self._sender
