OXIESEC PANEL

Name	Size	Modified	Perms
📁 ..	-	11/05/2020 06:02:51 AM	rwxr-xr-x
📄 __init__.py	336 bytes	11/30/2017 01:53:32 AM	rw-r--r--
📁 __pycache__	-	11/05/2020 06:02:51 AM	rwxr-xr-x
📄 aead.py	5.45 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 backend.py	73.75 KB	11/30/2017 01:54:42 AM	rw-r--r--
📄 ciphers.py	8.87 KB	10/28/2020 04:50:26 PM	rw-r--r--
📄 cmac.py	2.72 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 decode_asn1.py	30.09 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 dh.py	10.59 KB	11/30/2017 01:54:42 AM	rw-r--r--
📄 dsa.py	10.04 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 ec.py	10.04 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 encode_asn1.py	21.76 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 hashes.py	2.47 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 hmac.py	2.89 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 rsa.py	17.16 KB	10/28/2020 04:50:26 PM	rw-r--r--
📄 utils.py	1.37 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 x25519.py	2.73 KB	11/30/2017 01:53:32 AM	rw-r--r--
📄 x509.py	17.81 KB	11/30/2017 01:53:32 AM	rw-r--r--

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

from cryptography import utils
from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
from cryptography.hazmat.primitives import hashes

@utils.register_interface(hashes.HashContext)
class _HashContext(object):
    def __init__(self, backend, algorithm, ctx=None):
        self._algorithm = algorithm

self._backend = backend

if ctx is None:
            ctx = self._backend._lib.Cryptography_EVP_MD_CTX_new()
            ctx = self._backend._ffi.gc(
                ctx, self._backend._lib.Cryptography_EVP_MD_CTX_free
            )
            name = self._backend._build_openssl_digest_name(algorithm)
            evp_md = self._backend._lib.EVP_get_digestbyname(name)
            if evp_md == self._backend._ffi.NULL:
                raise UnsupportedAlgorithm(
                    "{0} is not a supported hash on this backend.".format(
                        name),
                    _Reasons.UNSUPPORTED_HASH
                )
            res = self._backend._lib.EVP_DigestInit_ex(ctx, evp_md,
                                                       self._backend._ffi.NULL)
            self._backend.openssl_assert(res != 0)

self._ctx = ctx

algorithm = utils.read_only_property("_algorithm")

def copy(self):
        copied_ctx = self._backend._lib.Cryptography_EVP_MD_CTX_new()
        copied_ctx = self._backend._ffi.gc(
            copied_ctx, self._backend._lib.Cryptography_EVP_MD_CTX_free
        )
        res = self._backend._lib.EVP_MD_CTX_copy_ex(copied_ctx, self._ctx)
        self._backend.openssl_assert(res != 0)
        return _HashContext(self._backend, self.algorithm, ctx=copied_ctx)

def update(self, data):
        res = self._backend._lib.EVP_DigestUpdate(self._ctx, data, len(data))
        self._backend.openssl_assert(res != 0)

def finalize(self):
        buf = self._backend._ffi.new("unsigned char[]",
                                     self._backend._lib.EVP_MAX_MD_SIZE)
        outlen = self._backend._ffi.new("unsigned int *")
        res = self._backend._lib.EVP_DigestFinal_ex(self._ctx, buf, outlen)
        self._backend.openssl_assert(res != 0)
        self._backend.openssl_assert(outlen[0] == self.algorithm.digest_size)
        return self._backend._ffi.buffer(buf)[:outlen[0]]