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codeql/python/ql/test/experimental/dataflow/tainttracking/defaultAdditionalTaintStep/test_json.py
Rasmus Wriedt Larsen 3e7dc12246 Python: Port taint tests to use inline expectations
The meat of this PR is described in the new python/ql/test/experimental/meta/InlineTaintTest.qll file:

> Defines a InlineExpectationsTest for checking whether any arguments in
> `ensure_tainted` and `ensure_not_tainted` calls are tainted.
>
> Also defines query predicates to ensure that:
> - if any arguments to `ensure_not_tainted` are tainted, their annotation is marked with `SPURIOUS`.
> - if any arguments to `ensure_tainted` are not tainted, their annotation is marked with `MISSING`.
>
> The functionality of this module is tested in `ql/test/experimental/meta/inline-taint-test-demo`.
2021-04-15 18:00:33 +02:00

65 lines
1.5 KiB
Python

# Add taintlib to PATH so it can be imported during runtime without any hassle
import sys; import os; sys.path.append(os.path.dirname(os.path.dirname((__file__))))
from taintlib import *
# This has no runtime impact, but allows autocomplete to work
from typing import TYPE_CHECKING
if TYPE_CHECKING:
from ..taintlib import *
# Actual tests
from io import StringIO
# Workaround for Python3 not having unicode
import sys
if sys.version_info[0] == 3:
unicode = str
def test():
print("\n# test")
ts = TAINTED_STRING
import json
ensure_tainted(
json.dumps(ts), # $ tainted
json.loads(json.dumps(ts)), # $ tainted
)
# For Python2, need to convert to unicode for StringIO to work
tainted_filelike = StringIO(unicode(json.dumps(ts)))
ensure_tainted(
tainted_filelike, # $ MISSING: tainted
json.load(tainted_filelike), # $ MISSING: tainted
)
def non_syntacical():
print("\n# non_syntacical")
ts = TAINTED_STRING
# a less syntactical approach
from json import load, loads, dumps
dumps_alias = dumps
ensure_tainted(
dumps(ts), # $ tainted
dumps_alias(ts), # $ tainted
loads(dumps(ts)), # $ tainted
)
# For Python2, need to convert to unicode for StringIO to work
tainted_filelike = StringIO(unicode(dumps(ts)))
ensure_tainted(
tainted_filelike, # $ MISSING: tainted
load(tainted_filelike), # $ MISSING: tainted
)
# Make tests runable
test()
non_syntacical()