mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-25 09:26:16 +03:00
113 lines
3.6 KiB
Python
113 lines
3.6 KiB
Python
from __future__ import annotations
|
|
|
|
import pytest
|
|
|
|
from PIL import Image
|
|
|
|
from .helper import hopper
|
|
|
|
TEST_FILE = "Tests/images/hopper.ppm"
|
|
|
|
ORIGINAL_LIMIT = Image.MAX_IMAGE_PIXELS
|
|
|
|
|
|
class TestDecompressionBomb:
|
|
def teardown_method(self) -> None:
|
|
Image.MAX_IMAGE_PIXELS = ORIGINAL_LIMIT
|
|
|
|
def test_no_warning_small_file(self) -> None:
|
|
# Implicit assert: no warning.
|
|
# A warning would cause a failure.
|
|
with Image.open(TEST_FILE):
|
|
pass
|
|
|
|
def test_no_warning_no_limit(self) -> None:
|
|
# Arrange
|
|
# Turn limit off
|
|
Image.MAX_IMAGE_PIXELS = None
|
|
assert Image.MAX_IMAGE_PIXELS is None
|
|
|
|
# Act / Assert
|
|
# Implicit assert: no warning.
|
|
# A warning would cause a failure.
|
|
with Image.open(TEST_FILE):
|
|
pass
|
|
|
|
def test_warning(self) -> None:
|
|
# Set limit to trigger warning on the test file
|
|
Image.MAX_IMAGE_PIXELS = 128 * 128 - 1
|
|
assert Image.MAX_IMAGE_PIXELS == 128 * 128 - 1
|
|
|
|
with pytest.warns(Image.DecompressionBombWarning):
|
|
with Image.open(TEST_FILE):
|
|
pass
|
|
|
|
def test_exception(self) -> None:
|
|
# Set limit to trigger exception on the test file
|
|
Image.MAX_IMAGE_PIXELS = 64 * 128 - 1
|
|
assert Image.MAX_IMAGE_PIXELS == 64 * 128 - 1
|
|
|
|
with pytest.raises(Image.DecompressionBombError):
|
|
with Image.open(TEST_FILE):
|
|
pass
|
|
|
|
def test_exception_ico(self) -> None:
|
|
with pytest.raises(Image.DecompressionBombError):
|
|
with Image.open("Tests/images/decompression_bomb.ico"):
|
|
pass
|
|
|
|
def test_exception_gif(self) -> None:
|
|
with pytest.raises(Image.DecompressionBombError):
|
|
with Image.open("Tests/images/decompression_bomb.gif"):
|
|
pass
|
|
|
|
def test_exception_gif_extents(self) -> None:
|
|
with Image.open("Tests/images/decompression_bomb_extents.gif") as im:
|
|
with pytest.raises(Image.DecompressionBombError):
|
|
im.seek(1)
|
|
|
|
def test_exception_gif_zero_width(self) -> None:
|
|
# Set limit to trigger exception on the test file
|
|
Image.MAX_IMAGE_PIXELS = 4 * 64 * 128
|
|
assert Image.MAX_IMAGE_PIXELS == 4 * 64 * 128
|
|
|
|
with pytest.raises(Image.DecompressionBombError):
|
|
with Image.open("Tests/images/zero_width.gif"):
|
|
pass
|
|
|
|
def test_exception_bmp(self) -> None:
|
|
with pytest.raises(Image.DecompressionBombError):
|
|
with Image.open("Tests/images/bmp/b/reallybig.bmp"):
|
|
pass
|
|
|
|
|
|
class TestDecompressionCrop:
|
|
@classmethod
|
|
def setup_class(cls) -> None:
|
|
width, height = 128, 128
|
|
Image.MAX_IMAGE_PIXELS = height * width * 4 - 1
|
|
|
|
@classmethod
|
|
def teardown_class(cls) -> None:
|
|
Image.MAX_IMAGE_PIXELS = ORIGINAL_LIMIT
|
|
|
|
def test_enlarge_crop(self) -> None:
|
|
# Crops can extend the extents, therefore we should have the
|
|
# same decompression bomb warnings on them.
|
|
with hopper() as src:
|
|
box = (0, 0, src.width * 2, src.height * 2)
|
|
with pytest.warns(Image.DecompressionBombWarning):
|
|
src.crop(box)
|
|
|
|
def test_crop_decompression_checks(self) -> None:
|
|
im = Image.new("RGB", (100, 100))
|
|
|
|
for value in ((-9999, -9999, -9990, -9990), (-999, -999, -990, -990)):
|
|
assert im.crop(value).size == (9, 9)
|
|
|
|
with pytest.warns(Image.DecompressionBombWarning):
|
|
im.crop((-160, -160, 99, 99))
|
|
|
|
with pytest.raises(Image.DecompressionBombError):
|
|
im.crop((-99909, -99990, 99999, 99999))
|