8002749462

Committed 22 Feb 2024 10:07AM CUT coverage: 88.482%. First build

Build # 8002749462

Build Type

push

github

Committed by

Synss

Commit Message

pk: Track cipher content internally

mbedtls-3.x

Run Details

2704 of 3056 relevant lines covered (88.48%)

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93.33

/src/mbedtls/cipher/DES.py

# SPDX-License-Identifier: MIT
# Copyright (c) 2016, Elaborated Networks GmbH
# Copyright (c) 2019, Mathias Laurin

"""Data Encryption Standard (DES) cipher developed by IBM
in the 70's."""

from __future__ import annotations

from typing import Final, Literal, Optional, Union

from mbedtls.exceptions import TLSError

from ._cipher import Cipher, Mode

__all__ = ["block_size", "key_size", "new"]


block_size: Final = 8
key_size: Final = 8


def new(
    key: bytes,
    mode: Union[int, Literal[Mode.CBC, Mode.ECB]],
    iv: Optional[bytes] = None,
) -> Cipher:
    """Return a `Cipher` object that can perform DES encryption and
    decryption.

    Data Encryption Standard (DES) cipher developed by IBM in the 70's.

    Parameters:
        key: The key to encrypt decrypt.  If None,
            encryption and decryption are unavailable.
        mode: The mode of operation of the cipher.
        iv: The initialization vector (IV).  The IV is
            required for every mode but ECB and CTR where it is ignored.
            If not set, the IV is initialized to all 0, which should not
            be used for encryption.

    """
    mode_ = Mode(mode)
    if len(key) != key_size:
        raise TLSError(msg="key size must be 16 bytes, got %r" % len(key))
    if mode_ not in {Mode.CBC, Mode.ECB}:
        raise TLSError(msg="unsupported mode %r" % mode_)
    name = ("DES-%s" % mode_.name).encode("ascii")
    return Cipher(name, key, mode_, iv)

1	# SPDX-License-Identifier: MIT
2	# Copyright (c) 2016, Elaborated Networks GmbH
3	# Copyright (c) 2019, Mathias Laurin
4
5	"""Data Encryption Standard (DES) cipher developed by IBM	1✔
6	in the 70's."""
7
8	from __future__ import annotations	1✔
9
10	from typing import Final, Literal, Optional, Union
11
12	from mbedtls.exceptions import TLSError	1✔
13
14	from ._cipher import Cipher, Mode	1✔
15
16	__all__ = ["block_size", "key_size", "new"]	1✔
17
18
19	block_size: Final = 8	1✔
20	key_size: Final = 8	1✔
21
22
23	def new(	1✔
24	key: bytes,
25	mode: Union[int, Literal[Mode.CBC, Mode.ECB]],
26	iv: Optional[bytes] = None,
27	) -> Cipher:
28	"""Return a `Cipher` object that can perform DES encryption and
29	decryption.
30
31	Data Encryption Standard (DES) cipher developed by IBM in the 70's.
32
33	Parameters:
34	key: The key to encrypt decrypt. If None,
35	encryption and decryption are unavailable.
36	mode: The mode of operation of the cipher.
37	iv: The initialization vector (IV). The IV is
38	required for every mode but ECB and CTR where it is ignored.
39	If not set, the IV is initialized to all 0, which should not
40	be used for encryption.
41
42	"""
43	mode_ = Mode(mode)	1✔
44	if len(key) != key_size:	1✔
45	raise TLSError(msg="key size must be 16 bytes, got %r" % len(key))	×
46	if mode_ not in {Mode.CBC, Mode.ECB}:	1✔
47	raise TLSError(msg="unsupported mode %r" % mode_)	1✔
48	name = ("DES-%s" % mode_.name).encode("ascii")	1✔
49	return Cipher(name, key, mode_, iv)	1✔

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