Server : LiteSpeed System : Linux barito.iixcp.rumahweb.net 5.14.0-611.49.1.el9_7.x86_64 #1 SMP PREEMPT_DYNAMIC Tue Apr 21 16:39:08 EDT 2026 x86_64 User : elvh3918 ( 1528) PHP Version : 8.2.31 Disable Function : mail Directory :  /usr/lib64/python3.9/site-packages/cryptography/hazmat/primitives/kdf/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.


import abc


class KeyDerivationFunction(metaclass=abc.ABCMeta):
    @abc.abstractmethod
    def derive(self, key_material: bytes) -> bytes:
        """
        Deterministically generates and returns a new key based on the existing
        key material.
        """

    @abc.abstractmethod
    def verify(self, key_material: bytes, expected_key: bytes) -> None:
        """
        Checks whether the key generated by the key material matches the
        expected derived key. Raises an exception if they do not match.
        """