Python hashlib.sha3_256方法代碼示例

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def hash(proto_with_payload):
        """
        Calculates hash of payload of proto message
        :proto_with_payload: proto transaction or query
        :return: bytes representation of hash
        """
        obj = None
        if hasattr(proto_with_payload, 'payload'):
            obj = getattr(proto_with_payload, 'payload')
        # hash of meta is implemented for block streaming queries,
        # because they do not have a payload in their schema
        elif hasattr(proto_with_payload, 'meta'):
            obj = getattr(proto_with_payload, 'meta')

        bytes = obj.SerializeToString()
        hash = hashlib.sha3_256(bytes).digest()
        return hash 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def _layer_cipher(constant: bytes, revision_counter: int, subcredential: bytes, blinded_key: bytes, salt: bytes) -> Tuple['cryptography.hazmat.primitives.ciphers.Cipher', Callable[[bytes], bytes]]:  # type: ignore
  try:
    from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
    from cryptography.hazmat.backends import default_backend
  except ImportError:
    raise ImportError('Layer encryption/decryption requires the cryptography module')

  kdf = hashlib.shake_256(blinded_key + subcredential + struct.pack('>Q', revision_counter) + salt + constant)
  keys = kdf.digest(S_KEY_LEN + S_IV_LEN + MAC_LEN)

  secret_key = keys[:S_KEY_LEN]
  secret_iv = keys[S_KEY_LEN:S_KEY_LEN + S_IV_LEN]
  mac_key = keys[S_KEY_LEN + S_IV_LEN:]

  cipher = Cipher(algorithms.AES(secret_key), modes.CTR(secret_iv), default_backend())
  mac_prefix = struct.pack('>Q', len(mac_key)) + mac_key + struct.pack('>Q', len(salt)) + salt

  return cipher, lambda ciphertext: hashlib.sha3_256(mac_prefix + ciphertext).digest() 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def address_from_identity_key(key: Union[bytes, 'cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PublicKey', 'cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PrivateKey'], suffix: bool = True) -> str:  # type: ignore
    """
    Converts a hidden service identity key into its address. This accepts all
    key formats (private, public, or public bytes).

    :param key: hidden service identity key
    :param suffix: includes the '.onion' suffix if true, excluded otherwise

    :returns: **str** hidden service address

    :raises: **ImportError** if key is a cryptographic type and ed25519 support
      is unavailable
    """

    key = stem.util._pubkey_bytes(key)  # normalize key into bytes

    version = stem.client.datatype.Size.CHAR.pack(3)
    checksum = hashlib.sha3_256(CHECKSUM_CONSTANT + key + version).digest()[:2]
    onion_address = base64.b32encode(key + checksum + version)

    return stem.util.str_tools._to_unicode(onion_address + b'.onion' if suffix else onion_address).lower() 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def sha3(seed):
    return sha3_256(to_string(seed))


# assert encode_hex(sha3(b'')) == b'c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470'


#def normalize_address(x, allow_blank=False):
#    if is_numeric(x):
#        return int_to_addr(x)
#    if allow_blank and x in {'', b''}:
#        return b''
#    if len(x) in (42, 50) and x[:2] in {'0x', b'0x'}:
#        x = x[2:]
#    if len(x) in (40, 48):
#        x = decode_hex(x)
#    if len(x) == 24:
#        assert len(x) == 24 and sha3(x[:20])[:4] == x[-4:]
#        x = x[:20]
#    if len(x) != 20:
#        raise Exception("Invalid address format: %r" % x)
#    return x 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def sign(self, data, is_hash: bool):
        if is_hash:
            if isinstance(data, str):
                try:
                    data = data.split("0x")[1] if data.startswith("0x") else data
                    data = binascii.unhexlify(data)
                except Exception as e:
                    logging.error(f"hash data must hex string or bytes \n exception : {e}")
                    return None

        if not isinstance(data, (bytes, bytearray)):
            logging.error(f"data must be bytes \n")
            return None

        raw_sig = self.private_key.ecdsa_sign_recoverable(msg=data,
                                                          raw=is_hash,
                                                          digest=hashlib.sha3_256)
        serialized_sig, recover_id = self.private_key.ecdsa_recoverable_serialize(raw_sig)
        return serialized_sig + bytes((recover_id, )) 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def to_hash32(self, value: Union[Hash32, bytes, bytearray, int, bool, dict]):
        if value is None:
            return Hash32.empty()
        elif isinstance(value, Hash32):
            return value
        elif isinstance(value, (bytes, bytearray)) and len(value) == 32:
            return Hash32(value)

        if isinstance(value, bool):
            value = b'\x01' if value else b'\x00'
        elif isinstance(value, int):
            if value < 0:
                raise RuntimeError(f"value : {value} is negative.")
            value = value.to_bytes((value.bit_length() + 7) // 8, "big")
        elif isinstance(value, dict):
            if self.type == BlockProverType.Receipt:
                value = dict(value)
                value.pop("failure", None)
                value.pop("blockHash", None)

            hash_generator = self.get_hash_generator()
            value = hash_generator.generate_salted_origin(value)
            value = value.encode()
        return Hash32(hashlib.sha3_256(value).digest()) 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def _sign(self,
              private_key: typing.Optional[PrivateKey] = None,
              signature: typing.Optional[bytes] = None) -> None:
        """
        Add a signature to this data.
        Supply either your private key for signing or pass an existing signature.

        :param private_key: the private key to sign with.
        :param signature: the signature to adapt.
        """
        if private_key is not None and signature is None:
            self.signature = private_key.signature(self.get_plaintext())
        elif private_key is None and signature is not None:
            self.signature = signature
        else:
            raise RuntimeError("Specify either private_key or signature!")
        self._hash = hashlib.sha3_256(self.get_plaintext_signed()).digest() 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def __init__(self, public_key: Optional[PublicKey] = None, private_key: Optional[PrivateKey] = None) -> None:
        """
        Create a new view of another's chain by specifying a public key or create your own chain by supplying
        a private key.

        :param public_key: the public key of the owner of this chain.
        :param private_key: the private key to use to add tokens to this chain.
        """
        super(TokenTree, self).__init__()
        self._logger = logging.getLogger(self.__class__.__name__)

        self.elements = {}
        self.unchained = OrderedDict()
        self.unchained_max_size = 100

        if public_key is not None and private_key is None:
            self.public_key = public_key.pub()
            self.private_key = None
        elif public_key is None and private_key is not None:
            self.private_key = private_key
            self.public_key = private_key.pub()
        else:
            raise RuntimeError("Specify either public_key or private_key!")

        self.genesis_hash = sha3_256(self.public_key.key_to_bin()).digest() 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def __init__(self, info, additional_fields=None, markdown_root='', standard_format=True):
        if additional_fields is None:
            additional_fields = {}

        # Allow info to be a string to simplify the API
        if isinstance(info, str):
            info = [info]

        self._data = OrderedDict()
        self._data['elements'] = []
        self._data['description'] = ''.join(_convert_to_description(d) for d in info)
        self._data['markdown'] = ''.join(_convert_to_markdown(d, markdown_root) for d in info)

        id_txt = ''.join(_convert_to_id(d) for d in info)
        self._data['id'] = hashlib.sha3_256(id_txt.encode('utf-8')).hexdigest()

        if standard_format:
            to_add = [i for i in info if not isinstance(i, str)]

            for add in to_add:
                self.add(add)

        if additional_fields:
            self._data['additional_fields'] = additional_fields 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def test_validate_tx_simple_create_signature(user_input, user_output, user_priv,
                                             asset_definition):
    from bigchaindb.common.transaction import Transaction
    from .utils import validate_transaction_model

    tx = Transaction(Transaction.CREATE, asset_definition, [user_input], [user_output])
    expected = deepcopy(user_output)
    tx_dict = tx.to_dict()
    tx_dict['inputs'][0]['fulfillment'] = None
    serialized_tx = json.dumps(tx_dict, sort_keys=True,
                               separators=(',', ':'), ensure_ascii=True)
    message = sha3_256(serialized_tx.encode()).digest()
    expected.fulfillment.sign(message, b58decode(user_priv))
    tx.sign([user_priv])

    assert tx.inputs[0].to_dict()['fulfillment'] == \
        expected.fulfillment.serialize_uri()
    assert tx.inputs_valid() is True

    validate_transaction_model(tx) 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def has_sha3():
    return 'sha3_256' in hashlib.algorithms_available 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def sha3_256_mod():
    if has_sha3():
        return hashlib.sha3_256
    else:
        try:
            import sha3
        except ModuleNotFoundError:
            cmd = "python3 -m pip install --user pysha3"
            print("try to install pysha3 with following command:")
            print(cmd)
            subprocess.run(cmd.split(), check=True)
            import sha3
        return sha3.sha3_256 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def reduced_hash(transaction):
        """
        Calculates hash of reduced payload of a transaction
        :param transaction: transaction to be processed
        :return: hex representation of hash
        """
        bytes = transaction.payload.reduced_payload.SerializeToString()
        hash = hashlib.sha3_256(bytes).digest()
        hex_hash = binascii.hexlify(hash)
        return hex_hash 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def identity_key_from_address(onion_address: str) -> bytes:
    """
    Converts a hidden service address into its public identity key.

    :param onion_address: hidden service address

    :returns: **bytes** for the hidden service's public identity key

    :raises: **ValueError** if address malformed or checksum is invalid
    """

    if onion_address.endswith('.onion'):
      onion_address = onion_address[:-6]

    if not stem.util.tor_tools.is_valid_hidden_service_address(onion_address, version = 3):
      raise ValueError("'%s.onion' isn't a valid hidden service v3 address" % onion_address)

    # onion_address = base32(PUBKEY | CHECKSUM | VERSION) + '.onion'
    # CHECKSUM = H('.onion checksum' | PUBKEY | VERSION)[:2]

    decoded_address = base64.b32decode(onion_address.upper())

    pubkey = decoded_address[:32]
    expected_checksum = decoded_address[32:34]
    version = decoded_address[34:35]

    checksum = hashlib.sha3_256(CHECKSUM_CONSTANT + pubkey + version).digest()[:2]

    if expected_checksum != checksum:
      checksum_str = stem.util.str_tools._to_unicode(binascii.hexlify(checksum))
      expected_checksum_str = stem.util.str_tools._to_unicode(binascii.hexlify(expected_checksum))

      raise ValueError('Bad checksum (expected %s but was %s)' % (expected_checksum_str, checksum_str))

    return pubkey 

# 需要導入模塊: import hashlib [as 別名]
# 或者: from hashlib import sha3_256 [as 別名]
def _subcredential(identity_key: 'cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PrivateKey', blinded_key: bytes) -> bytes:  # type: ignore
    # credential = H('credential' | public-identity-key)
    # subcredential = H('subcredential' | credential | blinded-public-key)

    credential = hashlib.sha3_256(b'credential%s' % stem.util._pubkey_bytes(identity_key)).digest()
    return hashlib.sha3_256(b'subcredential%s%s' % (credential, blinded_key)).digest()