| import io |
| import tarfile |
| import tempfile |
| import unittest |
| from pathlib import Path |
| from seer_replay.download import unpack |
|
|
|
|
| class BundleSafety(unittest.TestCase): |
| def test_rejects_escape_and_links(self): |
| for name, kind in [ |
| ("../outside", tarfile.REGTYPE), |
| ("/absolute", tarfile.REGTYPE), |
| ("link", tarfile.SYMTYPE), |
| ]: |
| with self.subTest(name=name), tempfile.TemporaryDirectory() as d: |
| root = Path(d) |
| bundle = root / "x.tar.gz" |
| out = root / "out" |
| out.mkdir() |
| with tarfile.open(bundle, "w:gz") as t: |
| m = tarfile.TarInfo(name) |
| m.type = kind |
| m.linkname = "../outside" |
| m.size = 0 |
| t.addfile(m, io.BytesIO(b"")) |
| with self.assertRaises(RuntimeError): |
| unpack(bundle, out, 10) |
| self.assertFalse((root / "outside").exists()) |
|
|
| def test_size_bound_and_valid_member(self): |
| with tempfile.TemporaryDirectory() as d: |
| root = Path(d) |
| bundle = root / "x.tar.gz" |
| out = root / "out" |
| out.mkdir() |
| with tarfile.open(bundle, "w:gz") as t: |
| m = tarfile.TarInfo("replay/value.txt") |
| m.size = 3 |
| t.addfile(m, io.BytesIO(b"abc")) |
| with self.assertRaises(RuntimeError): |
| unpack(bundle, out, 2) |
| self.assertEqual(unpack(bundle, out, 3), 1) |
| self.assertEqual((out / "replay/value.txt").read_bytes(), b"abc") |
|
|
|
|
| if __name__ == "__main__": |
| unittest.main() |
|
|
