OXIESEC PANEL

Name	Size	Modified	Perms
📁 ..	-	05/08/2025 02:18:07 PM	rwxr-xr-x
📄 __init__.py	246 bytes	03/02/2016 02:10:12 AM	rw-r--r--
📁 __pycache__	-	05/08/2025 02:18:07 PM	rwxr-xr-x
📁 asymmetric	-	05/08/2025 02:18:07 PM	rwxr-xr-x
📁 ciphers	-	05/08/2025 02:18:07 PM	rwxr-xr-x
📄 cmac.py	2.18 KB	03/02/2016 02:10:12 AM	rw-r--r--
📄 constant_time.py	798 bytes	03/02/2016 02:10:12 AM	rw-r--r--
📄 hashes.py	3.86 KB	03/02/2016 02:10:12 AM	rw-r--r--
📄 hmac.py	2.3 KB	03/02/2016 02:10:12 AM	rw-r--r--
📁 interfaces	-	05/08/2025 02:18:06 PM	rwxr-xr-x
📁 kdf	-	05/08/2025 02:18:07 PM	rwxr-xr-x
📄 keywrap.py	2.98 KB	03/02/2016 02:10:12 AM	rw-r--r--
📄 padding.py	3.55 KB	03/02/2016 02:10:12 AM	rw-r--r--
📄 serialization.py	5.03 KB	03/02/2016 02:10:12 AM	rw-r--r--
📁 twofactor	-	05/08/2025 02:18:07 PM	rwxr-xr-x

Editing: hashes.py

# 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.

from __future__ import absolute_import, division, print_function

import abc

import six

from cryptography import utils
from cryptography.exceptions import (
    AlreadyFinalized, UnsupportedAlgorithm, _Reasons
)
from cryptography.hazmat.backends.interfaces import HashBackend

@six.add_metaclass(abc.ABCMeta)
class HashAlgorithm(object):
    @abc.abstractproperty
    def name(self):
        """
        A string naming this algorithm (e.g. "sha256", "md5").
        """

@abc.abstractproperty
    def digest_size(self):
        """
        The size of the resulting digest in bytes.
        """

@abc.abstractproperty
    def block_size(self):
        """
        The internal block size of the hash algorithm in bytes.
        """

@six.add_metaclass(abc.ABCMeta)
class HashContext(object):
    @abc.abstractproperty
    def algorithm(self):
        """
        A HashAlgorithm that will be used by this context.
        """

@abc.abstractmethod
    def update(self, data):
        """
        Processes the provided bytes through the hash.
        """

@abc.abstractmethod
    def finalize(self):
        """
        Finalizes the hash context and returns the hash digest as bytes.
        """

@abc.abstractmethod
    def copy(self):
        """
        Return a HashContext that is a copy of the current context.
        """

@utils.register_interface(HashContext)
class Hash(object):
    def __init__(self, algorithm, backend, ctx=None):
        if not isinstance(backend, HashBackend):
            raise UnsupportedAlgorithm(
                "Backend object does not implement HashBackend.",
                _Reasons.BACKEND_MISSING_INTERFACE
            )

if not isinstance(algorithm, HashAlgorithm):
            raise TypeError("Expected instance of hashes.HashAlgorithm.")
        self._algorithm = algorithm

self._backend = backend

if ctx is None:
            self._ctx = self._backend.create_hash_ctx(self.algorithm)
        else:
            self._ctx = ctx

algorithm = utils.read_only_property("_algorithm")

def update(self, data):
        if self._ctx is None:
            raise AlreadyFinalized("Context was already finalized.")
        if not isinstance(data, bytes):
            raise TypeError("data must be bytes.")
        self._ctx.update(data)

def copy(self):
        if self._ctx is None:
            raise AlreadyFinalized("Context was already finalized.")
        return Hash(
            self.algorithm, backend=self._backend, ctx=self._ctx.copy()
        )

def finalize(self):
        if self._ctx is None:
            raise AlreadyFinalized("Context was already finalized.")
        digest = self._ctx.finalize()
        self._ctx = None
        return digest

@utils.register_interface(HashAlgorithm)
class SHA1(object):
    name = "sha1"
    digest_size = 20
    block_size = 64

@utils.register_interface(HashAlgorithm)
class SHA224(object):
    name = "sha224"
    digest_size = 28
    block_size = 64

@utils.register_interface(HashAlgorithm)
class SHA256(object):
    name = "sha256"
    digest_size = 32
    block_size = 64

@utils.register_interface(HashAlgorithm)
class SHA384(object):
    name = "sha384"
    digest_size = 48
    block_size = 128

@utils.register_interface(HashAlgorithm)
class SHA512(object):
    name = "sha512"
    digest_size = 64
    block_size = 128

@utils.register_interface(HashAlgorithm)
class RIPEMD160(object):
    name = "ripemd160"
    digest_size = 20
    block_size = 64

@utils.register_interface(HashAlgorithm)
class Whirlpool(object):
    name = "whirlpool"
    digest_size = 64
    block_size = 64

@utils.register_interface(HashAlgorithm)
class MD5(object):
    name = "md5"
    digest_size = 16
    block_size = 64