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64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
# -*- coding:utf-8 -*-
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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r"""
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==========================================================================
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B324: Test for use of insecure md4 and md5 hash functions in hashlib.new()
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==========================================================================
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This plugin checks for the usage of the insecure MD4 and MD5 hash functions
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in ``hashlib.new`` function. The ``hashlib.new`` function provides the ability
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to construct a new hashing object using the named algorithm. This can be used
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to create insecure hash functions like MD4 and MD5 if they are passed as
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algorithm names to this function.
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This is similar to B303 blacklist check, except that this checks for insecure
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hash functions created using ``hashlib.new`` function.
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:Example:
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>> Issue: [B324:hashlib_new] Use of insecure MD4 or MD5 hash function.
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Severity: Medium Confidence: High
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Location: examples/hashlib_new_insecure_funcs.py:3
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2
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3 md5_hash = hashlib.new('md5', string='test')
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4 print(md5_hash)
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.. versionadded:: 1.5.0
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"""
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import bandit
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from bandit.core import test_properties as test
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@test.test_id('B324')
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@test.checks('Call')
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def hashlib_new(context):
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if isinstance(context.call_function_name_qual, str):
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qualname_list = context.call_function_name_qual.split('.')
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func = qualname_list[-1]
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if 'hashlib' in qualname_list and func == 'new':
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args = context.call_args
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keywords = context.call_keywords
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name = args[0] if args else keywords['name']
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if name.lower() in ('md4', 'md5'):
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return bandit.Issue(
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severity=bandit.MEDIUM,
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confidence=bandit.HIGH,
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text="Use of insecure MD4 or MD5 hash function.",
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lineno=context.node.lineno,
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)
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