openstack/neutron-lib
Code Issues Proposed changes

User "sha1" with "usedforsecurity=False"

Browse Source 
That prevents the pep8 pylint error B324 [1].

[1]https://bandit.readthedocs.io/en/latest/plugins/b324_hashlib.html

Trivial-Fix

Change-Id: Idbec232e95bdc71942f4e3f88684c3de62294d51
This commit is contained in:
Rodolfo Alonso Hernandez 2022-11-17 13:09:14 +01:00
parent cf494c8be1
commit 2ded6ed3ce
2 changed files with 13 additions and 15 deletions
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3
neutron_lib/plugins/utils.py
View File

@ -286,7 +286,8 @@ def get_interface_name(name, prefix='', max_len=constants.DEVICE_NAME_MAX_LEN):
"given length for an interface name."))
namelen = max_len - len(prefix) - INTERFACE_HASH_LEN
hashed_name = hashlib.sha1(encodeutils.to_utf8(name))
hashed_name = hashlib.new('sha1', usedforsecurity=False)
hashed_name.update(encodeutils.to_utf8(name))
new_name = ('%(prefix)s%(truncated)s%(hash)s' %
{'prefix': prefix, 'truncated': name[0:namelen],
'hash': hashed_name.hexdigest()[0:INTERFACE_HASH_LEN]})

25
neutron_lib/tests/unit/plugins/test_utils.py
View File

@ -15,6 +15,7 @@
import hashlib
from unittest import mock
from oslo_utils import encodeutils
from oslo_utils import excutils
from oslo_utils import uuidutils
@ -28,12 +29,6 @@ from neutron_lib.tests import _base as base
LONG_NAME1 = "A_REALLY_LONG_INTERFACE_NAME1"
LONG_NAME2 = "A_REALLY_LONG_INTERFACE_NAME2"
SHORT_NAME = "SHORT"
MOCKED_HASH = "mockedhash"
class MockSHA(object):
def hexdigest(self):
return MOCKED_HASH
class TestUtils(base.BaseTestCase):
@ -175,18 +170,21 @@ class TestUtils(base.BaseTestCase):
core_plugin.update_port.assert_called_once_with(
'ctx', '1', {'port': '2'})
@mock.patch.object(hashlib, 'sha1', return_value=MockSHA())
def test_get_interface_name(self, mock_sha1):
@staticmethod
def _hash_prefix(name):
# nosec B324
hashed_name = hashlib.sha1(encodeutils.to_utf8(name))
return hashed_name.hexdigest()[0:utils.INTERFACE_HASH_LEN]
def test_get_interface_name(self):
prefix = "pre-"
prefix_long = "long_prefix"
prefix_exceeds_max_dev_len = "much_too_long_prefix"
hash_used = MOCKED_HASH[0:6]
self.assertEqual("A_REALLY_" + hash_used,
self.assertEqual("A_REALLY_" + self._hash_prefix(LONG_NAME1),
utils.get_interface_name(LONG_NAME1))
self.assertEqual("SHORT",
utils.get_interface_name(SHORT_NAME))
self.assertEqual("pre-A_REA" + hash_used,
self.assertEqual("pre-A_REA" + self._hash_prefix(LONG_NAME1),
utils.get_interface_name(LONG_NAME1, prefix=prefix))
self.assertEqual("pre-SHORT",
utils.get_interface_name(SHORT_NAME, prefix=prefix))
@ -203,8 +201,7 @@ class TestUtils(base.BaseTestCase):
if_prefix2 = utils.get_interface_name(LONG_NAME2, prefix=prefix)
self.assertNotEqual(if_prefix1, if_prefix2)
@mock.patch.object(hashlib, 'sha1', return_value=MockSHA())
def test_get_interface_max_len(self, mock_sha1):
def test_get_interface_max_len(self):
self.assertEqual(constants.DEVICE_NAME_MAX_LEN,
len(utils.get_interface_name(LONG_NAME1)))
self.assertEqual(10, len(utils.get_interface_name(LONG_NAME1,