FM / primitives

/snap/core24/1587/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/

/snap/core24/1587/usr/lib/python3/dist-packages/cryptography/hazmat/primitives

Name	Size	Mode	Actions
asymmetric/	-	0755	rm
ciphers/	-	0755	rm
kdf/	-	0755	rm
serialization/	-	0755	rm
twofactor/	-	0755	rm
__pycache__/	-	0755	rm
cmac.py	2065	0644	edit dl rm
constant_time.py	422	0644	edit dl rm
hashes.py	5115	0644	edit dl rm
hmac.py	423	0644	edit dl rm
keywrap.py	5678	0644	edit dl rm
padding.py	6242	0644	edit dl rm
poly1305.py	355	0644	edit dl rm
_asymmetric.py	532	0644	edit dl rm
_cipheralgorithm.py	1093	0644	edit dl rm
_serialization.py	5216	0644	edit dl rm
__init__.py	180	0644	edit dl rm

Edit: /snap/core24/1587/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/cmac.py (2065B)

# 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 annotations

import typing

from cryptography import utils
from cryptography.exceptions import AlreadyFinalized
from cryptography.hazmat.primitives import ciphers

if typing.TYPE_CHECKING:
    from cryptography.hazmat.backends.openssl.cmac import _CMACContext

class CMAC:
    _ctx: typing.Optional[_CMACContext]
    _algorithm: ciphers.BlockCipherAlgorithm

def __init__(
        self,
        algorithm: ciphers.BlockCipherAlgorithm,
        backend: typing.Any = None,
        ctx: typing.Optional[_CMACContext] = None,
    ) -> None:
        if not isinstance(algorithm, ciphers.BlockCipherAlgorithm):
            raise TypeError("Expected instance of BlockCipherAlgorithm.")
        self._algorithm = algorithm

if ctx is None:
            from cryptography.hazmat.backends.openssl.backend import (
                backend as ossl,
            )

self._ctx = ossl.create_cmac_ctx(self._algorithm)
        else:
            self._ctx = ctx

def update(self, data: bytes) -> None:
        if self._ctx is None:
            raise AlreadyFinalized("Context was already finalized.")

utils._check_bytes("data", data)
        self._ctx.update(data)

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

def verify(self, signature: bytes) -> None:
        utils._check_bytes("signature", signature)
        if self._ctx is None:
            raise AlreadyFinalized("Context was already finalized.")

ctx, self._ctx = self._ctx, None
        ctx.verify(signature)

def copy(self) -> CMAC:
        if self._ctx is None:
            raise AlreadyFinalized("Context was already finalized.")
        return CMAC(self._algorithm, ctx=self._ctx.copy())

# 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 annotations import typing from cryptography import utils from cryptography.exceptions import AlreadyFinalized from cryptography.hazmat.primitives import ciphers if typing.TYPE_CHECKING: from cryptography.hazmat.backends.openssl.cmac import _CMACContext class CMAC: _ctx: typing.Optional[_CMACContext] _algorithm: ciphers.BlockCipherAlgorithm def __init__( self, algorithm: ciphers.BlockCipherAlgorithm, backend: typing.Any = None, ctx: typing.Optional[_CMACContext] = None, ) -> None: if not isinstance(algorithm, ciphers.BlockCipherAlgorithm): raise TypeError("Expected instance of BlockCipherAlgorithm.") self._algorithm = algorithm if ctx is None: from cryptography.hazmat.backends.openssl.backend import ( backend as ossl, ) self._ctx = ossl.create_cmac_ctx(self._algorithm) else: self._ctx = ctx def update(self, data: bytes) -> None: if self._ctx is None: raise AlreadyFinalized("Context was already finalized.") utils._check_bytes("data", data) self._ctx.update(data) def finalize(self) -> bytes: if self._ctx is None: raise AlreadyFinalized("Context was already finalized.") digest = self._ctx.finalize() self._ctx = None return digest def verify(self, signature: bytes) -> None: utils._check_bytes("signature", signature) if self._ctx is None: raise AlreadyFinalized("Context was already finalized.") ctx, self._ctx = self._ctx, None ctx.verify(signature) def copy(self) -> CMAC: if self._ctx is None: raise AlreadyFinalized("Context was already finalized.") return CMAC(self._algorithm, ctx=self._ctx.copy())