def from_pem(cls, pem):
"""
:param pem: A private key previously encoded as PEM.
:type pem: ``bytes``
:rtype: :class:`~bitcash.PrivateKeyTestnet`
"""
return PrivateKeyTestnet(ECPrivateKey.from_pem(pem))
def from_int(cls, num):
"""
:param num: A private key in raw integer form.
:type num: ``int``
:rtype: :class:`~bitcash.PrivateKeyTestnet`
"""
return PrivateKeyTestnet(ECPrivateKey.from_int(num))
def from_der(cls, der):
"""
:param der: A private key previously encoded as DER.
:type der: ``bytes``
:rtype: :class:`~bitcash.PrivateKeyTestnet`
"""
return PrivateKeyTestnet(ECPrivateKey.from_der(der))
def from_bytes(cls, bytestr):
"""
:param bytestr: A private key previously encoded as hex.
:type bytestr: ``bytes``
:rtype: :class:`~bitcash.PrivateKeyTestnet`
"""
return PrivateKeyTestnet(ECPrivateKey(bytestr))
def from_hex(cls, hexed):
"""
:param hexed: A private key previously encoded as hex.
:type hexed: ``str``
:rtype: :class:`~bitcash.PrivateKeyTestnet`
"""
return PrivateKeyTestnet(ECPrivateKey.from_hex(hexed))
def __init__(self, wif=None):
if wif:
if isinstance(wif, str):
private_key_bytes, compressed, version = wif_to_bytes(wif)
self._pk = ECPrivateKey(private_key_bytes)
elif isinstance(wif, ECPrivateKey):
self._pk = wif
compressed = True
else:
raise TypeError('Wallet Import Format must be a string.')
else:
self._pk = ECPrivateKey()
compressed = True
self._public_point = None
self._public_key = self._pk.public_key.format(compressed=compressed)
def generate_key_address_pairs(prefix, counter, match,
queue): # pragma: no cover
context = Context()
while True:
if match.is_set():
return
with counter.get_lock():
counter.value += 1
private_key = ECPrivateKey(context=context)
address = b58encode_check(
b'\x00' + ripemd160_sha256(private_key.public_key.format()))
if address.startswith(prefix):
match.set()
queue.put_nowait((private_key.secret, address))
return
def test_init_from_key(self):
pk = ECPrivateKey()
base_key = BaseKey(pk)
assert base_key._pk == pk
def generate_key_address_pair(): # pragma: no cover
private_key = ECPrivateKey()
address = public_key_to_address(private_key.public_key.format())
return bytes_to_wif(private_key.secret), address
class BaseKey:
"""This class represents a point on the elliptic curve secp256k1 and
provides all necessary cryptographic functionality. You shouldn't use
this class directly.
:param wif: A private key serialized to the Wallet Import Format. If the
argument is not supplied, a new private key will be created.
The WIF compression flag will be adhered to, but the version
byte is disregarded. Compression will be used by all new keys.
:type wif: ``str``
:raises TypeError: If ``wif`` is not a ``str``.
"""
def __init__(self, wif=None):
if wif:
if isinstance(wif, str):
private_key_bytes, compressed, version = wif_to_bytes(wif)
self._pk = ECPrivateKey(private_key_bytes)
elif isinstance(wif, ECPrivateKey):
self._pk = wif
compressed = True
else:
raise TypeError('Wallet Import Format must be a string.')
else:
self._pk = ECPrivateKey()
compressed = True
self._public_point = None
self._public_key = self._pk.public_key.format(compressed=compressed)
@property
def public_key(self):
"""The public point serialized to bytes."""
return self._public_key
@property
def public_point(self):
"""The public point (x, y)."""
if self._public_point is None:
self._public_point = Point(*public_key_to_coords(self._public_key))
return self._public_point
def sign(self, data):
"""Signs some data which can be verified later by others using
the public key.
:param data: The message to sign.
:type data: ``bytes``
:returns: A signature compliant with BIP-62.
:rtype: ``bytes``
"""
return self._pk.sign(data)
def verify(self, signature, data):
"""Verifies some data was signed by this private key.
:param signature: The signature to verify.
:type signature: ``bytes``
:param data: The data that was supposedly signed.
:type data: ``bytes``
:rtype: ``bool``
"""
return self._pk.public_key.verify(signature, data)
def to_hex(self):
""":rtype: ``str``"""
return self._pk.to_hex()
def to_bytes(self):
""":rtype: ``bytes``"""
return self._pk.secret
def to_der(self):
""":rtype: ``bytes``"""
return self._pk.to_der()
def to_pem(self):
""":rtype: ``bytes``"""
return self._pk.to_pem()
def to_int(self):
""":rtype: ``int``"""
return self._pk.to_int()
def is_compressed(self):
"""Returns whether or not this private key corresponds to a compressed
public key.
:rtype: ``bool``
"""
return True if len(self.public_key) == 33 else False
def __eq__(self, other):
return self.to_int() == other.to_int()
