90 lines
3.5 KiB
Python
90 lines
3.5 KiB
Python
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#!/usr/bin/env python3
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# Copyright 2021 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import argparse
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import re
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import sys
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# A line should look like:
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# {prop_name} u:object_r:{context_name}:s0
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line_regex = re.compile(r'^(\S+)\s+u:object_r:([^:]+):s0.*$')
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# Parses a line in property_contexts and return a (prop, ctx) tuple.
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# Raises an error for any malformed entries.
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def parse_line(line):
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matched = line_regex.match(line)
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if not matched:
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raise ValueError('malformed entry "' + line + '" in property_contexts')
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return matched.group(1, 2)
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def parse_args():
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parser = argparse.ArgumentParser(
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description="Finds any violations in property_contexts, with given allowed prefixes. "
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"If any violations are found, return a nonzero (failure) exit code.")
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parser.add_argument("--property-contexts", help="Path to property_contexts file.")
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parser.add_argument("--allowed-property-prefix", action="extend", nargs="*",
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help="Allowed property prefixes. If empty, any properties are allowed.")
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parser.add_argument("--allowed-context-prefix", action="extend", nargs="*",
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help="Allowed context prefixes. If empty, any contexts are allowed.")
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parser.add_argument('--strict', action='store_true',
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help="Make the script fail if any violations are found.")
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return parser.parse_args()
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args = parse_args()
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violations = []
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with open(args.property_contexts, 'r') as f:
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lines = f.read().split('\n')
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for line in lines:
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tokens = line.strip()
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# if this line empty or a comment, skip
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if tokens == '' or tokens[0] == '#':
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continue
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prop, context = parse_line(line)
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violated = False
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if args.allowed_property_prefix and not prop.startswith(tuple(args.allowed_property_prefix)):
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violated = True
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if args.allowed_context_prefix and not context.startswith(tuple(args.allowed_context_prefix)):
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violated = True
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if violated:
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violations.append(line)
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if len(violations) > 0:
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print('******************************')
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print('%d violations found:' % len(violations))
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print('\n'.join(violations))
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print('******************************')
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print('%s contains properties which are not properly namespaced.' % args.property_contexts)
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print('This is enforced by VTS, so please fix such offending properties.')
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if args.allowed_property_prefix:
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print('Allowed property prefixes for %s: %s' % (args.property_contexts, args.allowed_property_prefix))
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if args.allowed_context_prefix:
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print('Allowed context prefixes for %s: %s' % (args.property_contexts, args.allowed_context_prefix))
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if args.strict:
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print('You can temporarily disable this check with setting BUILD_BROKEN_VENDOR_PROPERTY_NAMESPACE := true in BoardConfig.mk.')
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print('But property namespace is enforced by VTS, and you will need to fix such violations to pass VTS.')
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print('See test/vts-testcase/security/system_property/vts_treble_sys_prop_test.py for the detail of the VTS.')
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sys.exit(1)
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