def __init__(self, secret_exponent=None, public_pair=None, hash160=None,
prefer_uncompressed=None, is_compressed=True, is_pay_to_script=False, netcode=None):
"""
secret_exponent:
a long representing the secret exponent
public_pair:
a tuple of long integers on the ecdsa curve
hash160:
a hash160 value corresponding to a bitcoin address
Include at most one of secret_exponent, public_pair or hash160.
prefer_uncompressed:
whether or not to produce text outputs as compressed or uncompressed.
is_pay_to_script:
whether or not this key is for a pay-to-script style transaction
netcode:
the code for the network (as defined in pycoin.networks)
Include at most one of secret_exponent, public_pair or hash160.
prefer_uncompressed, is_compressed (booleans) are optional.
"""
if netcode is None:
netcode = get_current_netcode()
if [secret_exponent, public_pair, hash160].count(None) != 2:
raise ValueError("exactly one of secret_exponent, public_pair, hash160 must be passed.")
if prefer_uncompressed is None:
prefer_uncompressed = not is_compressed
self._prefer_uncompressed = prefer_uncompressed
self._secret_exponent = secret_exponent
self._public_pair = public_pair
self._hash160_uncompressed = None
self._hash160_compressed = None
if hash160:
if is_compressed:
self._hash160_compressed = hash160
else:
self._hash160_uncompressed = hash160
self._netcode = netcode
if self._public_pair is None and self._secret_exponent is not None:
if self._secret_exponent < 1 \
or self._secret_exponent >= ecdsa.generator_secp256k1.order():
raise InvalidSecretExponentError()
public_pair = ecdsa.public_pair_for_secret_exponent(
ecdsa.generator_secp256k1, self._secret_exponent)
self._public_pair = public_pair
if self._public_pair is not None \
and (None in self._public_pair or
not ecdsa.is_public_pair_valid(ecdsa.generator_secp256k1, self._public_pair)):
raise InvalidPublicPairError()
def __init__(self, secret_exponent=None, public_pair=None, hash160=None,
prefer_uncompressed=None, is_compressed=True, is_pay_to_script=False, netcode=None):
"""
secret_exponent:
a long representing the secret exponent
public_pair:
a tuple of long integers on the ecdsa curve
hash160:
a hash160 value corresponding to a bitcoin address
Include at most one of secret_exponent, public_pair or hash160.
prefer_uncompressed:
whether or not to produce text outputs as compressed or uncompressed.
is_pay_to_script:
whether or not this key is for a pay-to-script style transaction
netcode:
the code for the network (as defined in pycoin.networks)
Include at most one of secret_exponent, public_pair or hash160.
prefer_uncompressed, is_compressed (booleans) are optional.
"""
if netcode is None:
netcode = get_current_netcode()
if [secret_exponent, public_pair, hash160].count(None) != 2:
raise ValueError("exactly one of secret_exponent, public_pair, hash160 must be passed.")
if prefer_uncompressed is None:
prefer_uncompressed = not is_compressed
self._prefer_uncompressed = prefer_uncompressed
self._secret_exponent = secret_exponent
self._public_pair = public_pair
self._hash160_uncompressed = None
self._hash160_compressed = None
if hash160:
if is_compressed:
self._hash160_compressed = hash160
else:
self._hash160_uncompressed = hash160
self._netcode = netcode
if self._public_pair is None and self._secret_exponent is not None:
if self._secret_exponent < 1 \
or self._secret_exponent >= ecdsa.generator_secp256k1.order():
raise InvalidSecretExponentError()
public_pair = ecdsa.public_pair_for_secret_exponent(
ecdsa.generator_secp256k1, self._secret_exponent)
self._public_pair = public_pair
if self._public_pair is not None \
and (None in self._public_pair or
not ecdsa.is_public_pair_valid(ecdsa.generator_secp256k1, self._public_pair)):
raise InvalidPublicPairError()
def public_pair(self):
"""
Return a pair of integers representing the public key (or None).
"""
if self._public_pair is None and self.secret_exponent():
public_pair = ecdsa.public_pair_for_secret_exponent(
ecdsa.generator_secp256k1, self._secret_exponent)
if not ecdsa.is_public_pair_valid(ecdsa.generator_secp256k1, public_pair):
raise InvalidKeyGeneratedError(
"this key would produce an invalid public pair; please skip it")
self._public_pair = public_pair
return self._public_pair
def parse_as_public_pair(s):
for c in ",/":
if c in s:
s0, s1 = s.split(c, 1)
v0 = parse_as_number(s0)
if v0:
if s1 in ("even", "odd"):
return public_pair_for_x(generator_secp256k1, v0, is_even=(s1 == 'even'))
v1 = parse_as_number(s1)
if v1:
if not is_public_pair_valid(generator_secp256k1, (v0, v1)):
sys.stderr.write("invalid (x, y) pair\n")
sys.exit(1)
return (v0, v1)
def parse_as_public_pair(s):
for c in ",/":
if c in s:
s0, s1 = s.split(c, 1)
v0 = parse_as_number(s0)
if v0:
if s1 in ("even", "odd"):
return public_pair_for_x(generator_secp256k1, v0, is_even=(s1 == 'even'))
v1 = parse_as_number(s1)
if v1:
if not is_public_pair_valid(generator_secp256k1, (v0, v1)):
sys.stderr.write("invalid (x, y) pair\n")
sys.exit(1)
return (v0, v1)
def public_pair(self):
"""
Return a pair of integers representing the public key (or None).
"""
if self._public_pair is None and self.secret_exponent():
public_pair = ecdsa.public_pair_for_secret_exponent(
ecdsa.generator_secp256k1, self._secret_exponent)
if not ecdsa.is_public_pair_valid(ecdsa.generator_secp256k1,
public_pair):
raise InvalidKeyGeneratedError(
"this key would produce an invalid public pair; please skip it"
)
self._public_pair = public_pair
return self._public_pair
def parse_as_public_pair(s, generator):
for c in ",/":
if c in s:
s0, s1 = s.split(c, 1)
v0 = parse_as_number(s0)
if v0:
if s1 in ("even", "odd"):
is_y_odd = (s1 == "odd")
y = generator.y_values_for_x(v0)[is_y_odd]
return generator.Point(v0, y)
v1 = parse_as_number(s1)
if v1:
if not is_public_pair_valid(generator_secp256k1, (v0, v1)):
sys.stderr.write("invalid (x, y) pair\n")
sys.exit(1)
return (v0, v1)
def parse_as_public_pair(s):
try:
if s[:2] in (["02", "03", "04"]):
return encoding.sec_to_public_pair(encoding.h2b(s))
except (encoding.EncodingError, binascii.Error):
pass
for c in ",/":
if c in s:
s0, s1 = s.split(c, 1)
v0 = parse_as_number(s0)
if v0:
if s1 in ("even", "odd"):
return ecdsa.public_pair_for_x(ecdsa.generator_secp256k1, v0, is_even=(s1=='even'))
v1 = parse_as_number(s1)
if v1:
if not ecdsa.is_public_pair_valid(ecdsa.generator_secp256k1, (v0, v1)):
sys.stderr.write("invalid (x, y) pair\n")
sys.exit(1)
return (v0, v1)