Python coincurve.PublicKey方法代碼示例

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def valid(self):
        """Check if this object is valid or not"""
        if not self.signature:
            return False

        assert isinstance(self.signature, bytes)
        assert 68 <= len(self.signature) <= 71
        assert isinstance(self.user_public_key, bytes)
        assert len(self.user_public_key) == 33
        assert isinstance(self.user_address, str)
        assert re.match(r'^(?:0[xX])?[0-9a-fA-F]{40}$', self.user_address)
        public_key = PublicKey(self.user_public_key)
        verified = public_key.verify(
            self.signature,
            self.serialize(include_signature=False),
        )
        if not verified:
            return False

        if get_address(public_key) != self.user_address:
            return False

        return self.id == self.hash 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def is_valid_pubkey(pubkey, usehex, require_compressed=False):
    """ Returns True if the serialized pubkey is a valid secp256k1
    pubkey serialization or False if not; returns False for an
    uncompressed encoding if require_compressed is True.
    """
    # sanity check for public key
    # see https://github.com/bitcoin/bitcoin/blob/master/src/pubkey.h
    if require_compressed:
        valid_uncompressed = False
    elif len(pubkey) == 65 and pubkey[:1] in (b'\x04', b'\x06', b'\x07'):
        valid_uncompressed = True
    else:
        valid_uncompressed = False

    if not ((len(pubkey) == 33 and pubkey[:1] in (b'\x02', b'\x03')) or
    valid_uncompressed):
        return False
    # serialization is valid, but we must ensure it corresponds
    # to a valid EC point:
    try:
        dummy = secp256k1.PublicKey(pubkey)
    except:
        return False
    return True 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def multiply(s, pub, usehex, rawpub=True, return_serialized=True):
    '''Input binary compressed pubkey P(33 bytes)
    and scalar s(32 bytes), return s*P.
    The return value is a binary compressed public key,
    or a PublicKey object if return_serialized is False.
    Note that the called function does the type checking
    of the scalar s.
    ('raw' options passed in)
    '''
    newpub = secp256k1.PublicKey(pub)
    #see note to "tweak_mul" function in podle.py
    if sys.version_info >= (3,0):
        res = newpub.multiply(native_bytes(s))
    else:
        res = newpub.multiply(bytes_to_native_str(s))
    if not return_serialized:
        return res
    return res.format() 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def ecdsa_raw_verify(msg, pub, sig, usehex, rawmsg=False):
    '''Take the binary message msg and binary signature sig,
    and verify it against the pubkey pub.
    If rawmsg is True, no sha256 hash is applied to msg before verifying.
    In this case, msg must be a precalculated hash (256 bit).
    If rawmsg is False, the secp256k1 lib will hash the message as part
    of the ECDSA-SHA256 verification algo.
    Return value: True if the signature is valid for this pubkey, False
    otherwise.
    Since the arguments may come from external messages their content is
    not guaranteed, so return False on any parsing exception.
    '''
    try:
        if rawmsg:
            assert len(msg) == 32
        newpub = secp256k1.PublicKey(pub)
        if rawmsg:
            retval = newpub.verify(sig, msg, hasher=None)
        else:
            retval = newpub.verify(sig, msg)
    except:
        return False
    return retval 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def __init__(self, ledger, pubkey, chain_code, n, depth, parent=None):
        super().__init__(ledger, chain_code, n, depth, parent)
        if isinstance(pubkey, PublicKey):
            self.verifying_key = pubkey
        else:
            self.verifying_key = self._verifying_key_from_pubkey(pubkey) 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def _verifying_key_from_pubkey(cls, pubkey):
        """ Converts a 33-byte compressed pubkey into an PublicKey object. """
        if not isinstance(pubkey, (bytes, bytearray)):
            raise TypeError('pubkey must be raw bytes')
        if len(pubkey) != 33:
            raise ValueError('pubkey must be 33 bytes')
        if pubkey[0] not in (2, 3):
            raise ValueError('invalid pubkey prefix byte')
        return PublicKey(pubkey) 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def get_address(public_key: PublicKey) -> str:
    """Derive an Ethereum-style address from the given public key."""
    return '0x' + sha3_256(public_key.format(False)[1:]).hexdigest()[-40:] 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def __init__(self, private_key: PrivateKey, session=db.session):
        if not isinstance(private_key, PrivateKey):
            raise TypeError(
                f'private_key must be an instance of {PrivateKey.__module__}.'
                f'{PrivateKey.__qualname__}, not {private_key!r}'
            )
        self.private_key = private_key
        self.public_key: PublicKey = private_key.public_key
        self.session = session 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def test_get_address():
    raw_key = bytes.fromhex(
        '04fb0af727d1839557ea5214a7b7dd799c05dab9da63329a6c6d9836fd19a29ce'
        'bc34f7ba31877b22f6767bb1d9f376a33fc0f28f37ada368611b011c01dbef90f'
    )
    pubkey = PublicKey(raw_key)
    assert '0x80e0b0a7cc8001086a37648f993b2bd855d0ab59' == get_address(pubkey) 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def public_key_to_address(public_key: PublicKey) -> Address:
    """ Converts a public key to an Ethereum address. """
    key_bytes = public_key.format(compressed=False)
    return Address(keccak(key_bytes[1:])[-20:]) 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def podle_PublicKey(P):
    """Returns a PublicKey object from a binary string
    """
    return secp256k1.PublicKey(P) 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def add_pubkeys(pubkeys, usehex):
    '''Input a list of binary compressed pubkeys
    and return their sum as a binary compressed pubkey.'''
    pubkey_list = [secp256k1.PublicKey(x) for x in pubkeys]
    r = secp256k1.PublicKey.combine_keys(pubkey_list)
    return r.format() 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def encrypt(receiver_pk: Union[str, bytes], msg: bytes) -> bytes:
    """
    Encrypt with receiver's secp256k1 public key

    Parameters
    ----------
    receiver_pk: Union[str, bytes]
        Receiver's public key (hex str or bytes)
    msg: bytes
        Data to encrypt

    Returns
    -------
    bytes
        Encrypted data
    """
    ephemeral_key = generate_key()
    if isinstance(receiver_pk, str):
        receiver_pubkey = hex2pub(receiver_pk)
    elif isinstance(receiver_pk, bytes):
        receiver_pubkey = PublicKey(receiver_pk)
    else:
        raise TypeError("Invalid public key type")

    aes_key = encapsulate(ephemeral_key, receiver_pubkey)
    cipher_text = aes_encrypt(aes_key, msg)
    return ephemeral_key.public_key.format(False) + cipher_text 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def decrypt(receiver_sk: Union[str, bytes], msg: bytes) -> bytes:
    """
    Decrypt with receiver's secp256k1 private key

    Parameters
    ----------
    receiver_sk: Union[str, bytes]
        Receiver's private key (hex str or bytes)
    msg: bytes
        Data to decrypt

    Returns
    -------
    bytes
        Plain text
    """
    if isinstance(receiver_sk, str):
        private_key = hex2prv(receiver_sk)
    elif isinstance(receiver_sk, bytes):
        private_key = PrivateKey(receiver_sk)
    else:
        raise TypeError("Invalid secret key type")

    pubkey = msg[0:65]  # uncompressed pubkey's length is 65 bytes
    encrypted = msg[65:]
    ephemeral_public_key = PublicKey(pubkey)

    aes_key = decapsulate(ephemeral_public_key, private_key)
    return aes_decrypt(aes_key, encrypted) 

# 需要導入模塊: import coincurve [as 別名]
# 或者: from coincurve import PublicKey [as 別名]
def hex2pub(pub_hex: str) -> PublicKey:
    """
    Convert ethereum hex to EllipticCurvePublicKey
    The hex should be 65 bytes, but ethereum public key only has 64 bytes
    So have to add \x04

    Parameters
    ----------
    pub_hex: str
        Public key hex string

    Returns
    -------
    coincurve.PublicKey
        A secp256k1 public key

    >>> data = b'0'*32
    >>> data_hash = sha256(data)
    >>> eth_prv = generate_eth_key()
    >>> cc_prv = hex2prv(eth_prv.to_hex())
    >>> eth_prv.sign_msg_hash(data_hash).to_bytes() == cc_prv.sign_recoverable(data)
    True
    >>> pk_hex = eth_prv.public_key.to_hex()
    >>> computed_pub = hex2pub(pk_hex)
    >>> computed_pub == cc_prv.public_key
    True
    """
    uncompressed = decode_hex(pub_hex)
    if len(uncompressed) == 64:  # eth public key format
        uncompressed = b"\x04" + uncompressed

    return PublicKey(uncompressed)