15400568096

Committed 02 Jun 2025 07:03PM UTC coverage: 85.758% (-1.7%) from 87.47%

Build # 15400568096

Build Type

Pull #127

github

Committed by

pre-commit-ci[bot]

Commit Message

[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Pull Request Pull Request #127: [pre-commit.ci] pre-commit autoupdate

Run Details

2523 of 2942 relevant lines covered (85.76%)

0.86 hits per line

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92.86

/src/mbedtls/cipher/ARC4.py

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

"""Alleged River Cipher 4 cipher (ARC4 or ARCFOUR) designed in 1987
at RSA Security."""

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 = 1
key_size: Final = 16


def new(
    key: bytes,
    mode: Optional[Union[int, Literal[Mode.STREAM]]] = None,
    iv: Optional[bytes] = None,
) -> Cipher:
    """Return a `Cipher` object that can perform ARC4 encryption and
    decryption.

    Alleged River Cipher 4 cipher (ARC4 or ARCFOUR) designed in 1987
    at RSA Security.

    Parameters:
        key: The key to encrypt decrypt.  If None,
            encryption and decryption are unavailable.
        mode: The feedback mode is ignored for ARC4.
        iv: ARC4 does not use IV.

    """
    if len(key) != key_size:
        raise TLSError(
            msg="key size must be %i bytes, got %i" % (key_size, len(key))
        )
    if mode not in {None, Mode.STREAM}:
        raise TLSError(msg="unsupported mode %r" % mode)
    name = ("ARC4-%i" % (len(key) * 8)).encode("ascii")
    return Cipher(name, key, Mode.STREAM, iv)

1	# SPDX-License-Identifier: MIT
2	# Copyright (c) 2016, Elaborated Networks GmbH
3	# Copyright (c) 2019, Mathias Laurin
4
5	"""Alleged River Cipher 4 cipher (ARC4 or ARCFOUR) designed in 1987	1✔
6	at RSA Security."""
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	block_size: Final = 1	1✔
19	key_size: Final = 16	1✔
20
21
22	def new(	1✔
23	key: bytes,
24	mode: Optional[Union[int, Literal[Mode.STREAM]]] = None,
25	iv: Optional[bytes] = None,
26	) -> Cipher:
27	"""Return a `Cipher` object that can perform ARC4 encryption and
28	decryption.
29
30	Alleged River Cipher 4 cipher (ARC4 or ARCFOUR) designed in 1987
31	at RSA Security.
32
33	Parameters:
34	key: The key to encrypt decrypt. If None,
35	encryption and decryption are unavailable.
36	mode: The feedback mode is ignored for ARC4.
37	iv: ARC4 does not use IV.
38
39	"""
40	if len(key) != key_size:	1✔
41	raise TLSError(	×
42	msg="key size must be %i bytes, got %i" % (key_size, len(key))
43	)
44	if mode not in {None, Mode.STREAM}:	1✔
45	raise TLSError(msg="unsupported mode %r" % mode)	1✔
46	name = ("ARC4-%i" % (len(key) * 8)).encode("ascii")	1✔
47	return Cipher(name, key, Mode.STREAM, iv)	1✔

Synss / python-mbedtls / 15400568096

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