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testsuite: add argon2 wrong-passphrase test for decrypt_key_file, refs #9686 #9691

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Merged
ThomasWaldmann merged 1 commit into from
May 31, 2026
Merged

testsuite: add argon2 wrong-passphrase test for decrypt_key_file, refs #9686 #9691

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10 changes: 10 additions & 0 deletions src/borg/testsuite/crypto/key_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -318,3 +318,13 @@ def to_dict(key):

assert to_dict(load_me) == to_dict(save_me)
assert msgpack.unpackb(a2b_base64(saved))["algorithm"] == KEY_ALGORITHMS["argon2"]


def test_argon2_wrong_passphrase_returns_none(monkeypatch):
# a wrong passphrase derives a different key, so the Argon2 integrity check fails;
# decrypt_key_file signals this by returning None, not by raising (refs #8036)
repository = MagicMock(id=b"repository_id")
monkeypatch.setenv("BORG_PASSPHRASE", "correct passphrase")
key = AESOCBRepoKey.create(repository, args=MagicMock(key_algorithm="argon2"))
saved = repository.save_key.call_args.args[0]
assert key.decrypt_key_file(a2b_base64(saved), "wrong passphrase") is None
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