test_utils.py
No OneTemporary
Actions

Size

1 KB

Subscribers

None

test_utils.py
View Options

	# Copyright (C) 2020 The Software Heritage developers
	# See the AUTHORS file at the top-level directory of this distribution
	# License: GNU Affero General Public License version 3, or any later version
	# See top-level LICENSE file for more information

	import hashlib
	import re

	from base64 import urlsafe_b64encode

	from swh.web.auth.utils import gen_oidc_pkce_codes


	def test_gen_oidc_pkce_codes():
	"""
	Check generated PKCE codes respect the specification
	(see https://tools.ietf.org/html/rfc7636#section-4.1)
	"""
	code_verifier, code_challenge = gen_oidc_pkce_codes()

	# check the code verifier only contains allowed characters
	assert re.match(r'[a-zA-Z0-9-\._~]+', code_verifier)

	# check minimum and maximum authorized length for the
	# code verifier
	assert len(code_verifier) >= 43
	assert len(code_verifier) <= 128

	# compute code challenge from code verifier
	challenge = hashlib.sha256(code_verifier.encode('ascii')).digest()
	challenge = urlsafe_b64encode(challenge).decode('ascii')
	challenge = challenge.replace('=', '')

	# check base64 padding is not present
	assert not code_challenge[-1].endswith('=')
	# check code challenge is valid
	assert code_challenge == challenge