mirror of
https://github.com/mandiant/capa.git
synced 2025-12-05 20:40:05 -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.
106 lines
3.5 KiB
Python
106 lines
3.5 KiB
Python
# Copyright 2023 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 io
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from pathlib import Path
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from elftools.elf.elffile import ELFFile
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from capa.features.extractors.elffile import extract_file_export_names, extract_file_import_names
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CD = Path(__file__).resolve().parent
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SAMPLE_PATH = CD / "data" / "055da8e6ccfe5a9380231ea04b850e18.elf_"
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STRIPPED_SAMPLE_PATH = CD / "data" / "bb38149ff4b5c95722b83f24ca27a42b.elf_"
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def check_import_features(sample_path, expected_imports):
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path = Path(sample_path)
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elf = ELFFile(io.BytesIO(path.read_bytes()))
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# Extract imports
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imports = list(extract_file_import_names(elf))
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# Verify that at least one import was found
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assert len(imports) > 0, "No imports were found."
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# Extract the symbol names from the extracted imports
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extracted_symbol_names = [imported[0].value for imported in imports]
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# Check if all expected symbol names are found
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for symbol_name in expected_imports:
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assert symbol_name in extracted_symbol_names, f"Symbol '{symbol_name}' not found in imports."
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def check_export_features(sample_path, expected_exports):
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path = Path(sample_path)
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elf = ELFFile(io.BytesIO(path.read_bytes()))
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# Extract imports
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exports = list(extract_file_export_names(elf))
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# Verify that at least one export was found
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assert len(exports) > 0, "No exports were found."
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# Extract the symbol names from the extracted imports
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extracted_symbol_names = [exported[0].value for exported in exports]
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# Check if all expected symbol names are found
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for symbol_name in expected_exports:
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assert symbol_name in extracted_symbol_names, f"Symbol '{symbol_name}' not found in exports."
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def test_stripped_elffile_import_features():
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expected_imports = ["__cxa_atexit", "__cxa_finalize", "__stack_chk_fail", "fclose", "fopen", "__android_log_print"]
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check_import_features(STRIPPED_SAMPLE_PATH, expected_imports)
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def test_stripped_elffile_export_features():
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expected_exports = [
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"_ZN7_JNIEnv14GetArrayLengthEP7_jarray",
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"Java_o_ac_a",
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"Java_o_ac_b",
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"_Z6existsPKc",
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"_ZN7_JNIEnv17GetStringUTFCharsEP8_jstringPh",
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"_ZN7_JNIEnv21GetObjectArrayElementEP13_jobjectArrayi",
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"_ZN7_JNIEnv21ReleaseStringUTFCharsEP8_jstringPKc",
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]
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check_export_features(STRIPPED_SAMPLE_PATH, expected_exports)
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def test_elffile_import_features():
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expected_imports = [
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"memfrob",
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"puts",
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"__libc_start_main",
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"malloc",
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"__cxa_finalize",
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]
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check_import_features(SAMPLE_PATH, expected_imports)
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def test_elffile_export_features():
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expected_exports = [
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"deregister_tm_clones",
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"register_tm_clones",
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"__do_global_dtors_aux",
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"completed.8060",
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"__do_global_dtors_aux_fini_array_entry",
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"frame_dummy",
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"_init",
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"__libc_csu_fini",
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"_fini",
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"__dso_handle",
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"_IO_stdin_used",
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"__libc_csu_init",
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]
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check_export_features(SAMPLE_PATH, expected_exports)
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