def get_verifying_key(serialized_msg, serialized_sig):
"""Attempts to recover a public key from a message and a signature.
Args:
serialized_msg (str): A serialized message.
serialized_sig (str): A serialized signature.
Returns:
str: a public key.
"""
v, r, s = pybitcointools.decode_sig(serialized_sig)
msghash = pybitcointools.electrum_sig_hash(serialized_msg)
z = pybitcointools.hash_to_int(msghash)
compress = True if v >= 31 else False
if compress:
rec = v - 31
else:
rec = v - 27
try:
pubkey = nativeECDSA.recover_pubkey(
str(z), str(r), str(s), int(rec))
except Exception as ex:
logger.warn('Unable to extract public key from signature' + ex.args[0])
return ""
pubkey = pubkey.translate(None,
'h') # strip out hex indicators from opencpp
pubkey = '04' + pubkey # indicate uncompressed pubkey
if compress:
pubkey = pybitcointools.compress(pubkey)
return pubkey
def get_verifying_key(serialized_msg, serialized_sig):
"""Attempts to recover a public key from a message and a signature.
Args:
serialized_msg (str): A serialized message.
serialized_sig (str): A serialized signature.
Returns:
str: a public key.
"""
v, r, s = pybitcointools.decode_sig(serialized_sig)
msghash = pybitcointools.electrum_sig_hash(serialized_msg)
z = pybitcointools.hash_to_int(msghash)
compress = True if v >= 31 else False
if compress:
rec = v - 31
else:
rec = v - 27
try:
pubkey = nativeECDSA.recover_pubkey(
str(z), str(r), str(s), int(rec))
except Exception as ex:
logger.warn('Unable to extract public key from signature' + ex.args[0])
return ""
pubkey = pubkey.translate(None,
'h') # strip out hex indicators from opencpp
pubkey = '04' + pubkey # indicate uncompressed pubkey
if compress:
pubkey = pybitcointools.compress(pubkey)
return pubkey
def recover_pubkey(message, signature):
v, r, s = pybitcointools.decode_sig(signature)
msghash = pybitcointools.electrum_sig_hash(message)
z = pybitcointools.hash_to_int(msghash)
compress = True if v >= 31 else False
if compress:
rec = v - 31
else:
rec = v - 27
try:
pubkey = nativeECDSA.recover_pubkey(str(z), str(r), str(s), int(rec))
except ValueError as ex:
LOGGER.warning('Unable to extract public key from signature' +
ex.args[0])
return ""
try:
# pybitcointools package
pubkey = pubkey.translate(None, 'h')
except TypeError:
# bitcoin package
pubkey = pubkey.translate('h')
pubkey = '04' + pubkey
if compress:
pubkey = pybitcointools.compress(pubkey)
return pubkey
def test_compressed_keys(self):
"""
Tests compressed key
"""
msg = 'foo'
priv = pbt.encode_privkey(pbt.random_key(), 'hex_compressed')
sig = pbt.ecdsa_sign(msg, priv)
# Force old pybitcointools to behave
v, r, s = pbt.decode_sig(sig)
if v < 31:
v += 4
sig = pbt.encode_sig(v, r, s)
pub = pbt.compress(pbt.privtopub(priv))
native_recovered = pbct_nativerecover.recover_pubkey(msg, sig)
self.assertEquals(native_recovered, pub,
"Priv Key that failed: {}".format(priv))
def test_compressed_keys(self):
"""
Tests compressed key
"""
msg = 'foo'
self.longMessage = True
priv = pbt.encode_privkey(pbt.random_key(), 'hex_compressed')
sig = pbt.ecdsa_sign(msg, priv)
# Force old pybitcointools to behave
v, r, s = pbt.decode_sig(sig)
if v < 31:
v += 4
sig = pbt.encode_sig(v, r, s)
pub = pbt.compress(pbt.privtopub(priv))
native_recovered = gossip.signed_object.get_verifying_key(msg, sig)
self.assertEquals(native_recovered, pub,
"Priv Key that failed: {}".format(priv))
def test_compressed_keys(self):
"""
Tests compressed key
"""
msg = 'foo'
self.longMessage = True
priv = pbt.encode_privkey(pbt.random_key(), 'hex_compressed')
sig = pbt.ecdsa_sign(msg, priv)
# Force old pybitcointools to behave
v, r, s = pbt.decode_sig(sig)
if v < 31:
v += 4
sig = pbt.encode_sig(v, r, s)
pub = pbt.compress(pbt.privtopub(priv))
native_recovered = gossip.signed_object.get_verifying_key(msg, sig)
self.assertEquals(native_recovered, pub,
"Priv Key that failed: {}".format(priv))
def recover_pubkey(message, signature):
v, r, s = pybitcointools.decode_sig(signature)
msghash = pybitcointools.electrum_sig_hash(message)
q = pybitcointools.ecdsa_raw_recover(msghash, (v, r, s))
# A prior implementation set the behavior that this
# method should return an encoded recovered pubkey or
# an empty string if there is a recovery error. This
# differs from the pybitcointools implementation of
# ecdsa_recover, which returns the recovered pubkey
# or False, if a recovery error occurs.
if not q:
return ""
compress = True if v >= 31 else False
if compress:
pubkey = pybitcointools.encode_pubkey(q, 'hex_compressed')
else:
pubkey = pybitcointools.encode_pubkey(q, 'hex')
return pubkey
def get_verifying_key(serialized_msg, serialized_sig):
"""Attempts to recover a public key from a message and a signature.
Args:
serialized_msg (str): A serialized message.
serialized_sig (str): A serialized signature.
Returns:
str: a public key.
"""
v, r, s = pybitcointools.decode_sig(serialized_sig)
msghash = pybitcointools.electrum_sig_hash(serialized_msg)
z = pybitcointools.hash_to_int(msghash)
yBit = v - 27
try:
pubkey = nativeECDSA.recover_pubkey(str(z), str(r), str(s), int(yBit))
except Exception as ex:
logger.warn('Unable to extract public key from signature' + ex.args[0])
return ""
pubkey = pubkey.translate(None,
'h') # strip out hex indicators from opencpp
pubkey = "04" + pubkey # add header to match pybitcointools format
return pubkey
def get_verifying_key(serialized_msg, serialized_sig):
"""Attempts to recover a public key from a message and a signature.
Args:
serialized_msg (str): A serialized message.
serialized_sig (str): A serialized signature.
Returns:
str: a public key.
"""
v, r, s = pybitcointools.decode_sig(serialized_sig)
msghash = pybitcointools.electrum_sig_hash(serialized_msg)
z = pybitcointools.hash_to_int(msghash)
yBit = v - 27
try:
pubkey = nativeECDSA.recover_pubkey(
str(z), str(r), str(s), int(yBit))
except Exception as ex:
logger.warn('Unable to extract public key from signature' + ex.args[0])
return ""
pubkey = pubkey.translate(None,
'h') # strip out hex indicators from opencpp
pubkey = "04" + pubkey # add header to match pybitcointools format
return pubkey
