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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-01-30 23:36
__init__.py	1.91 KB	-rw-r--r--	2024-02-16 21:11
b64.py	1.45 KB	-rw-r--r--	2024-02-16 21:11
errors.py	791 B	-rw-r--r--	2024-02-16 21:11
interfaces.py	7.61 KB	-rw-r--r--	2024-02-16 21:11
json_util.py	18.11 KB	-rw-r--r--	2024-02-16 21:11
jwa.py	7.31 KB	-rw-r--r--	2024-02-16 21:11
jwk.py	13.66 KB	-rw-r--r--	2024-02-16 21:11
jws.py	15.13 KB	-rw-r--r--	2024-02-16 21:11
magic_typing.py	556 B	-rw-r--r--	2024-02-16 21:11
py.typed	0 B	-rw-r--r--	2024-02-16 21:11
util.py	9.81 KB	-rw-r--r--	2024-02-16 21:11

Rename

"""`JOSE Base64`_ is defined as:

- URL-safe Base64
  - padding stripped

.. _`JOSE Base64`:
    https://tools.ietf.org/html/draft-ietf-jose-json-web-signature-37#appendix-C

.. Do NOT try to call this module "base64", as it will "shadow" the
   standard library.

"""
import base64
from typing import Union

def b64encode(data: bytes) -> bytes:
    """JOSE Base64 encode.

:param data: Data to be encoded.
    :type data: bytes

:returns: JOSE Base64 string.
    :rtype: bytes

:raises TypeError: if ``data`` is of incorrect type

"""
    if not isinstance(data, bytes):
        raise TypeError("argument should be bytes")
    return base64.urlsafe_b64encode(data).rstrip(b"=")

def b64decode(data: Union[bytes, str]) -> bytes:
    """JOSE Base64 decode.

:param data: Base64 string to be decoded. If it's unicode, then
                 only ASCII characters are allowed.
    :type data: bytes or unicode

:returns: Decoded data.
    :rtype: bytes

:raises TypeError: if input is of incorrect type
    :raises ValueError: if input is unicode with non-ASCII characters

"""
    if isinstance(data, str):
        try:
            data = data.encode("ascii")
        except UnicodeEncodeError:
            raise ValueError("unicode argument should contain only ASCII characters")
    elif not isinstance(data, bytes):
        raise TypeError("argument should be a str or unicode")

return base64.urlsafe_b64decode(data + b"=" * (4 - (len(data) % 4)))