Fix Kozea#2093, Mark use of hashlib.md5() as not for security

.github/workflows/tests.yml

@@ -11,9 +11,9 @@ jobs:
         python-version: ['3.12']
         include:
           - os: ubuntu-latest
-            python-version: '3.8'
+            python-version: '3.9'
           - os: ubuntu-latest
-            python-version: 'pypy-3.8'
+            python-version: 'pypy-3.9'
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5

README.rst

@@ -13,7 +13,7 @@ WebKit or Gecko. The CSS layout engine is written in Python, designed for
 pagination, and meant to be easy to hack on.
 
 * Free software: BSD license
-* For Python 3.8+, tested on CPython and PyPy
+* For Python 3.9+, tested on CPython and PyPy
 * Documentation: https://doc.courtbouillon.org/weasyprint
 * Examples: https://weasyprint.org/#samples
 * Changelog: https://github.com/Kozea/WeasyPrint/releases

docs/first_steps.rst

@@ -9,7 +9,7 @@ Installation
 
 WeasyPrint |version| depends on:
 
-* Python_ ≥ 3.8.0
+* Python_ ≥ 3.9.0
 * Pango_ ≥ 1.44.0
 * pydyf_ ≥ 0.8.0
 * CFFI_ ≥ 0.6

pyproject.toml

@@ -8,7 +8,7 @@ description = 'The Awesome Document Factory'
 keywords = ['html', 'css', 'pdf', 'converter']
 authors = [{name = 'Simon Sapin', email = 'simon.sapin@exyr.org'}]
 maintainers = [{name = 'CourtBouillon', email = 'contact@courtbouillon.org'}]
-requires-python = '>=3.8'
+requires-python = '>=3.9'
 readme = {file = 'README.rst', content-type = 'text/x-rst'}
 license = {file = 'LICENSE'}
 dependencies = [
@@ -29,7 +29,6 @@ classifiers = [
   'Programming Language :: Python',
   'Programming Language :: Python :: 3',
   'Programming Language :: Python :: 3 :: Only',
-  'Programming Language :: Python :: 3.8',
   'Programming Language :: Python :: 3.9',
   'Programming Language :: Python :: 3.10',
   'Programming Language :: Python :: 3.11',

weasyprint/document.py

@@ -169,7 +169,8 @@ class DiskCache:
         self._disk_paths = set()
 
     def _path_from_key(self, key):
-        return self._path / md5(key.encode()).hexdigest()
+        digest = md5(key.encode(), usedforsecurity=False).hexdigest()
+        return self._path / digest
 
     def __getitem__(self, key):
         if key in self._memory_cache:

weasyprint/images.py

@@ -326,7 +326,7 @@ def get_image_from_uri(cache, url_fetcher, options, url, forced_mime_type=None,
                     raise ImageLoadingError.from_exception(raster_exception)
             else:
                 # Store image id to enable cache in Stream.add_image
-                image_id = md5(url.encode()).hexdigest()
+                image_id = md5(url.encode(), usedforsecurity=False).hexdigest()
                 image = RasterImage(
                     pillow_image, image_id, string, filename, cache,
                     orientation, options)

weasyprint/pdf/anchors.py

@@ -1,8 +1,8 @@
 """Insert anchors, links, bookmarks and inputs in PDFs."""
 
-import hashlib
 import io
 import mimetypes
+from hashlib import md5
 from os.path import basename
 from urllib.parse import unquote, urlsplit
 
@@ -302,7 +302,7 @@ def write_pdf_attachment(pdf, attachment, compress):
     except URLFetchingError as exception:
         LOGGER.error('Failed to load attachment: %s', exception)
         return
-    attachment.md5 = hashlib.md5(stream).hexdigest()
+    attachment.md5 = md5(stream, usedforsecurity=False).hexdigest()
 
     # TODO: Use the result object from a URL fetch operation to provide more
     # details on the possible filename and MIME type.

weasyprint/pdf/stream.py

@@ -63,7 +63,7 @@ class Font:
         # Never use the built-in hash function here: it’s not stable
         self.hash = ''.join(
             chr(65 + letter % 26) for letter
-            in md5(description_string).digest()[:6])
+            in md5(description_string, usedforsecurity=False).digest()[:6])
 
         # Name
         fields = description_string.split(b' ')

weasyprint/text/fonts.py

@@ -1,6 +1,6 @@
 """Interface with external libraries managing fonts installed on the system."""
 
-from hashlib import sha1
+from hashlib import md5
 from io import BytesIO
 from pathlib import Path
 from shutil import rmtree
@@ -121,10 +121,11 @@ class FontConfiguration:
             rule_descriptors.get('font_weight', 'normal')]
         fontconfig_stretch = FONTCONFIG_STRETCH[
             rule_descriptors.get('font_stretch', 'normal')]
-        config_key = sha1((
+        config_key = (
             f'{rule_descriptors["font_family"]}-{fontconfig_style}-'
-            f'{fontconfig_weight}-{features_string}').encode()).hexdigest()
-        font_path = self._folder / config_key
+            f'{fontconfig_weight}-{features_string}').encode()
+        config_digest = md5(config_key, usedforsecurity=False).hexdigest()
+        font_path = self._folder / config_digest
         if font_path.exists():
             return
 
@@ -209,7 +210,7 @@ class FontConfiguration:
                     continue
                 font_path.write_bytes(font)
 
-                xml_path = self._folder / f'{config_key}.xml'
+                xml_path = self._folder / f'{config_digest}.xml'
                 xml_path.write_text(f'''<?xml version="1.0"?>
                 <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
                 <fontconfig>