https://github.com/python/cpython/commit/16a6270aa61c86c430a308c0f766a69a88c9a3a5
commit: 16a6270aa61c86c430a308c0f766a69a88c9a3a5
branch: main
author: Tomas R. <tomas.ro...@gmail.com>
committer: picnixz <10796600+picn...@users.noreply.github.com>
date: 2025-04-04T13:26:15Z
summary:
gh-130655: Add a test for bad magic numbers in `.mo` files parsed by `gettext`
(#131909)
files:
M Lib/test/test_gettext.py
diff --git a/Lib/test/test_gettext.py b/Lib/test/test_gettext.py
index 04d26596849be6..87a77aab19336e 100644
--- a/Lib/test/test_gettext.py
+++ b/Lib/test/test_gettext.py
@@ -37,6 +37,9 @@
bmsgd2luayAoaW4gIm15IG90aGVyIGNvbnRleHQiKQB3aW5rIHdpbmsA
'''
+# .mo file with an invalid magic number
+GNU_MO_DATA_BAD_MAGIC_NUMBER = base64.b64encode(b'ABCD')
+
# This data contains an invalid major version number (5)
# An unexpected major version number should be treated as an error when
# parsing a .mo file
@@ -109,6 +112,7 @@
LOCALEDIR = os.path.join('xx', 'LC_MESSAGES')
MOFILE = os.path.join(LOCALEDIR, 'gettext.mo')
+MOFILE_BAD_MAGIC_NUMBER = os.path.join(LOCALEDIR,
'gettext_bad_magic_number.mo')
MOFILE_BAD_MAJOR_VERSION = os.path.join(LOCALEDIR,
'gettext_bad_major_version.mo')
MOFILE_BAD_MINOR_VERSION = os.path.join(LOCALEDIR,
'gettext_bad_minor_version.mo')
UMOFILE = os.path.join(LOCALEDIR, 'ugettext.mo')
@@ -129,6 +133,8 @@ def setUpClass(cls):
os.makedirs(LOCALEDIR)
with open(MOFILE, 'wb') as fp:
fp.write(base64.decodebytes(GNU_MO_DATA))
+ with open(MOFILE_BAD_MAGIC_NUMBER, 'wb') as fp:
+ fp.write(base64.decodebytes(GNU_MO_DATA_BAD_MAGIC_NUMBER))
with open(MOFILE_BAD_MAJOR_VERSION, 'wb') as fp:
fp.write(base64.decodebytes(GNU_MO_DATA_BAD_MAJOR_VERSION))
with open(MOFILE_BAD_MINOR_VERSION, 'wb') as fp:
@@ -223,6 +229,16 @@ def test_bindtextdomain(self):
def test_textdomain(self):
self.assertEqual(gettext.textdomain(), 'gettext')
+ def test_bad_magic_number(self):
+ with open(MOFILE_BAD_MAGIC_NUMBER, 'rb') as fp:
+ with self.assertRaises(OSError) as cm:
+ gettext.GNUTranslations(fp)
+
+ exception = cm.exception
+ self.assertEqual(exception.errno, 0)
+ self.assertEqual(exception.strerror, "Bad magic number")
+ self.assertEqual(exception.filename, MOFILE_BAD_MAGIC_NUMBER)
+
def test_bad_major_version(self):
with open(MOFILE_BAD_MAJOR_VERSION, 'rb') as fp:
with self.assertRaises(OSError) as cm:
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