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63 lines
2.3 KiB
Python
63 lines
2.3 KiB
Python
from __future__ import annotations
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import shutil
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from io import BytesIO
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from pathlib import Path
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from typing import IO, Callable
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import pytest
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from PIL import GifImagePlugin, Image, JpegImagePlugin
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from .helper import cjpeg_available, djpeg_available, is_win32, netpbm_available
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TEST_JPG = "Tests/images/hopper.jpg"
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TEST_GIF = "Tests/images/hopper.gif"
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test_filenames = ("temp_';", 'temp_";', "temp_'\"|", "temp_'\"||", "temp_'\"&&")
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@pytest.mark.skipif(is_win32(), reason="Requires Unix or macOS")
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class TestShellInjection:
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def assert_save_filename_check(
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self,
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tmp_path: Path,
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src_img: Image.Image,
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save_func: Callable[[Image.Image, IO[bytes], str | bytes], None],
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) -> None:
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for filename in test_filenames:
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dest_file = str(tmp_path / filename)
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save_func(src_img, BytesIO(), dest_file)
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# If file can't be opened, shell injection probably occurred
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with Image.open(dest_file) as im:
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im.load()
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@pytest.mark.skipif(not djpeg_available(), reason="djpeg not available")
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def test_load_djpeg_filename(self, tmp_path: Path) -> None:
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for filename in test_filenames:
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src_file = str(tmp_path / filename)
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shutil.copy(TEST_JPG, src_file)
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with Image.open(src_file) as im:
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assert isinstance(im, JpegImagePlugin.JpegImageFile)
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im.load_djpeg()
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@pytest.mark.skipif(not cjpeg_available(), reason="cjpeg not available")
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def test_save_cjpeg_filename(self, tmp_path: Path) -> None:
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with Image.open(TEST_JPG) as im:
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self.assert_save_filename_check(tmp_path, im, JpegImagePlugin._save_cjpeg)
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@pytest.mark.skipif(not netpbm_available(), reason="Netpbm not available")
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def test_save_netpbm_filename_bmp_mode(self, tmp_path: Path) -> None:
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with Image.open(TEST_GIF) as im:
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im_rgb = im.convert("RGB")
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self.assert_save_filename_check(
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tmp_path, im_rgb, GifImagePlugin._save_netpbm
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)
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@pytest.mark.skipif(not netpbm_available(), reason="Netpbm not available")
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def test_save_netpbm_filename_l_mode(self, tmp_path: Path) -> None:
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with Image.open(TEST_GIF) as im:
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im_l = im.convert("L")
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self.assert_save_filename_check(tmp_path, im_l, GifImagePlugin._save_netpbm)
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