mirror of
https://github.com/mandiant/capa.git
synced 2025-12-06 04:41:00 -08:00
3cd97ae9f2
Replace the header from source code files using the following script:
```Python
for dir_path, dir_names, file_names in os.walk("capa"):
for file_name in file_names:
# header are only in `.py` and `.toml` files
if file_name[-3:] not in (".py", "oml"):
continue
file_path = f"{dir_path}/{file_name}"
f = open(file_path, "rb+")
content = f.read()
m = re.search(OLD_HEADER, content)
if not m:
continue
print(f"{file_path}: {m.group('year')}")
content = content.replace(m.group(0), NEW_HEADER % m.group("year"))
f.seek(0)
f.write(content)
```
Some files had the copyright headers inside a `"""` comment and needed
manual changes before applying the script. `hook-vivisect.py` and
`pyinstaller.spec` didn't include the license in the header and also
needed manual changes.
The old header had the confusing sentence `All rights reserved`, which
does not make sense for an open source license. Replace the header by
the default Google header that corrects this issue and keep capa
consistent with other Google projects.
Adapt the linter to work with the new header.
Replace also the copyright text in the `web/public/index.html` file for
consistency.
158 lines
7.3 KiB
Python
158 lines
7.3 KiB
Python
# Copyright 2020 Google LLC
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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 capa.features.address
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from capa.engine import Or, And, Not, Some, Range
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from capa.features.insn import Number
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ADDR1 = capa.features.address.AbsoluteVirtualAddress(0x401001)
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ADDR2 = capa.features.address.AbsoluteVirtualAddress(0x401002)
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ADDR3 = capa.features.address.AbsoluteVirtualAddress(0x401003)
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ADDR4 = capa.features.address.AbsoluteVirtualAddress(0x401004)
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def test_number():
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assert bool(Number(1).evaluate({Number(0): {ADDR1}})) is False
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assert bool(Number(1).evaluate({Number(1): {ADDR1}})) is True
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assert bool(Number(1).evaluate({Number(2): {ADDR1, ADDR2}})) is False
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def test_and():
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assert bool(And([Number(1)]).evaluate({Number(0): {ADDR1}})) is False
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assert bool(And([Number(1)]).evaluate({Number(1): {ADDR1}})) is True
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assert bool(And([Number(1), Number(2)]).evaluate({Number(0): {ADDR1}})) is False
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assert bool(And([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}})) is False
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assert bool(And([Number(1), Number(2)]).evaluate({Number(2): {ADDR1}})) is False
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assert bool(And([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}, Number(2): {ADDR2}})) is True
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def test_or():
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assert bool(Or([Number(1)]).evaluate({Number(0): {ADDR1}})) is False
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assert bool(Or([Number(1)]).evaluate({Number(1): {ADDR1}})) is True
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assert bool(Or([Number(1), Number(2)]).evaluate({Number(0): {ADDR1}})) is False
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assert bool(Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}})) is True
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assert bool(Or([Number(1), Number(2)]).evaluate({Number(2): {ADDR1}})) is True
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assert bool(Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}, Number(2): {ADDR2}})) is True
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def test_not():
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assert bool(Not(Number(1)).evaluate({Number(0): {ADDR1}})) is True
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assert bool(Not(Number(1)).evaluate({Number(1): {ADDR1}})) is False
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def test_some():
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assert bool(Some(0, [Number(1)]).evaluate({Number(0): {ADDR1}})) is True
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assert bool(Some(1, [Number(1)]).evaluate({Number(0): {ADDR1}})) is False
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assert bool(Some(2, [Number(1), Number(2), Number(3)]).evaluate({Number(0): {ADDR1}})) is False
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assert bool(Some(2, [Number(1), Number(2), Number(3)]).evaluate({Number(0): {ADDR1}, Number(1): {ADDR1}})) is False
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assert (
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bool(
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Some(2, [Number(1), Number(2), Number(3)]).evaluate(
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{Number(0): {ADDR1}, Number(1): {ADDR1}, Number(2): {ADDR1}}
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)
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)
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is True
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)
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assert (
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bool(
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Some(2, [Number(1), Number(2), Number(3)]).evaluate(
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{Number(0): {ADDR1}, Number(1): {ADDR1}, Number(2): {ADDR1}, Number(3): {ADDR1}}
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)
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)
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is True
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)
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assert (
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bool(
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Some(2, [Number(1), Number(2), Number(3)]).evaluate(
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{Number(0): {ADDR1}, Number(1): {ADDR1}, Number(2): {ADDR1}, Number(3): {ADDR1}, Number(4): {ADDR1}}
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)
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)
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is True
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)
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def test_complex():
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assert True is bool(
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Or([And([Number(1), Number(2)]), Or([Number(3), Some(2, [Number(4), Number(5), Number(6)])])]).evaluate(
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{Number(5): {ADDR1}, Number(6): {ADDR1}, Number(7): {ADDR1}, Number(8): {ADDR1}}
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)
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)
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assert False is bool(
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Or([And([Number(1), Number(2)]), Or([Number(3), Some(2, [Number(4), Number(5)])])]).evaluate(
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{Number(5): {ADDR1}, Number(6): {ADDR1}, Number(7): {ADDR1}, Number(8): {ADDR1}}
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)
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)
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def test_range():
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# unbounded range, but no matching feature
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# since the lower bound is zero, and there are zero matches, ok
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assert bool(Range(Number(1)).evaluate({Number(2): {}})) is True # type: ignore
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# unbounded range with matching feature should always match
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assert bool(Range(Number(1)).evaluate({Number(1): {}})) is True # type: ignore
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assert bool(Range(Number(1)).evaluate({Number(1): {ADDR1}})) is True
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# unbounded max
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assert bool(Range(Number(1), min=1).evaluate({Number(1): {ADDR1}})) is True
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assert bool(Range(Number(1), min=2).evaluate({Number(1): {ADDR1}})) is False
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assert bool(Range(Number(1), min=2).evaluate({Number(1): {ADDR1, ADDR2}})) is True
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# unbounded min
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assert bool(Range(Number(1), max=0).evaluate({Number(1): {ADDR1}})) is False
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assert bool(Range(Number(1), max=1).evaluate({Number(1): {ADDR1}})) is True
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assert bool(Range(Number(1), max=2).evaluate({Number(1): {ADDR1}})) is True
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assert bool(Range(Number(1), max=2).evaluate({Number(1): {ADDR1, ADDR2}})) is True
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assert bool(Range(Number(1), max=2).evaluate({Number(1): {ADDR1, ADDR2, ADDR3}})) is False
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# we can do an exact match by setting min==max
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assert bool(Range(Number(1), min=1, max=1).evaluate({Number(1): {}})) is False # type: ignore
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assert bool(Range(Number(1), min=1, max=1).evaluate({Number(1): {ADDR1}})) is True
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assert bool(Range(Number(1), min=1, max=1).evaluate({Number(1): {ADDR1, ADDR2}})) is False
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# bounded range
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assert bool(Range(Number(1), min=1, max=3).evaluate({Number(1): {}})) is False # type: ignore
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assert bool(Range(Number(1), min=1, max=3).evaluate({Number(1): {ADDR1}})) is True
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assert bool(Range(Number(1), min=1, max=3).evaluate({Number(1): {ADDR1, ADDR2}})) is True
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assert bool(Range(Number(1), min=1, max=3).evaluate({Number(1): {ADDR1, ADDR2, ADDR3}})) is True
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assert bool(Range(Number(1), min=1, max=3).evaluate({Number(1): {ADDR1, ADDR2, ADDR3, ADDR4}})) is False
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def test_short_circuit():
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assert bool(Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}})) is True
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# with short circuiting, only the children up until the first satisfied child are captured.
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assert len(Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}}, short_circuit=True).children) == 1
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assert len(Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}}, short_circuit=False).children) == 2
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def test_eval_order():
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# base cases.
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assert bool(Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}})) is True
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assert bool(Or([Number(1), Number(2)]).evaluate({Number(2): {ADDR1}})) is True
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# with short circuiting, only the children up until the first satisfied child are captured.
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assert len(Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}}).children) == 1
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assert len(Or([Number(1), Number(2)]).evaluate({Number(2): {ADDR1}}).children) == 2
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assert len(Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}, Number(2): {ADDR1}}).children) == 1
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# and its guaranteed that children are evaluated in order.
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assert Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}}).children[0].statement == Number(1)
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assert Or([Number(1), Number(2)]).evaluate({Number(1): {ADDR1}}).children[0].statement != Number(2)
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assert Or([Number(1), Number(2)]).evaluate({Number(2): {ADDR1}}).children[1].statement == Number(2)
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assert Or([Number(1), Number(2)]).evaluate({Number(2): {ADDR1}}).children[1].statement != Number(1)
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