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__pycache__	-	0755	-
__init__.py	341 B	0644	Edit Rename Delete
backend.py	8.38 KB	0644	Edit Rename Delete
ciphers.py	7.76 KB	0644	Edit Rename Delete
hashes.py	1.99 KB	0644	Edit Rename Delete
hmac.py	2.14 KB	0644	Edit Rename Delete

Edit File: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:
            try:
                methods = self._backend._hash_mapping[self.algorithm.name]
            except KeyError:
                raise UnsupportedAlgorithm(
                    "{0} is not a supported hash on this backend.".format(
                        algorithm.name),
                    _Reasons.UNSUPPORTED_HASH
                )
            ctx = self._backend._ffi.new(methods.ctx)
            res = methods.hash_init(ctx)
            assert res == 1

self._ctx = ctx

algorithm = utils.read_only_property("_algorithm")

def copy(self):
        methods = self._backend._hash_mapping[self.algorithm.name]
        new_ctx = self._backend._ffi.new(methods.ctx)
        # CommonCrypto has no APIs for copying hashes, so we have to copy the
        # underlying struct.
        new_ctx[0] = self._ctx[0]

return _HashContext(self._backend, self.algorithm, ctx=new_ctx)

def update(self, data):
        methods = self._backend._hash_mapping[self.algorithm.name]
        res = methods.hash_update(self._ctx, data, len(data))
        assert res == 1

def finalize(self):
        methods = self._backend._hash_mapping[self.algorithm.name]
        buf = self._backend._ffi.new("unsigned char[]",
                                     self.algorithm.digest_size)
        res = methods.hash_final(buf, self._ctx)
        assert res == 1
        return self._backend._ffi.buffer(buf)[:]

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current directory: / / snap / core / current / usr / lib / python3 / dist-packages / cryptography / hazmat / backends / commoncrypto

Edit File:hashes.py