| 1 | """ |
| 2 | test_policy_unit |
| 3 | ================ |
| 4 | |
| 5 | Focused policy/container checks around successful-open counting. |
| 6 | """ |
| 7 | from __future__ import annotations |
| 8 | |
| 9 | import sys |
| 10 | from pathlib import Path |
| 11 | |
| 12 | ROOT = Path(__file__).resolve().parent.parent |
| 13 | sys.path.insert(0, str(ROOT)) |
| 14 | |
| 15 | from oversight_core import ( |
| 16 | ClassicIdentity, |
| 17 | Manifest, |
| 18 | Recipient, |
| 19 | content_hash, |
| 20 | open_sealed, |
| 21 | seal, |
| 22 | ) |
| 23 | from oversight_core.policy import PolicyContext, PolicyViolation, record_open |
| 24 | |
| 25 | |
| 26 | def test_wrong_recipient_does_not_consume_open_count(tmp_path): |
| 27 | issuer = ClassicIdentity.generate() |
| 28 | alice = ClassicIdentity.generate() |
| 29 | bob = ClassicIdentity.generate() |
| 30 | plaintext = b"hello policy" |
| 31 | recipient = Recipient( |
| 32 | recipient_id="alice", |
| 33 | x25519_pub=alice.x25519_pub.hex(), |
| 34 | ed25519_pub=alice.ed25519_pub.hex(), |
| 35 | ) |
| 36 | manifest = Manifest.new( |
| 37 | "test.txt", |
| 38 | content_hash(plaintext), |
| 39 | len(plaintext), |
| 40 | "issuer", |
| 41 | issuer.ed25519_pub.hex(), |
| 42 | recipient, |
| 43 | "http://localhost:8765", |
| 44 | "text/plain", |
| 45 | ) |
| 46 | manifest.policy["max_opens"] = 1 |
| 47 | blob = seal(plaintext, manifest, issuer.ed25519_priv, alice.x25519_pub) |
| 48 | |
| 49 | ctx = PolicyContext(state_dir=tmp_path, mode="LOCAL_ONLY") |
| 50 | try: |
| 51 | open_sealed(blob, bob.x25519_priv, policy_ctx=ctx) |
| 52 | except Exception: |
| 53 | pass |
| 54 | else: |
| 55 | raise AssertionError("wrong recipient unexpectedly decrypted file") |
| 56 | |
| 57 | recovered, _ = open_sealed(blob, alice.x25519_priv, policy_ctx=ctx) |
| 58 | assert recovered == plaintext |
| 59 | |
| 60 | |
| 61 | def test_registry_modes_fail_closed(): |
| 62 | issuer = ClassicIdentity.generate() |
| 63 | alice = ClassicIdentity.generate() |
| 64 | plaintext = b"hello policy" |
| 65 | recipient = Recipient( |
| 66 | recipient_id="alice", |
| 67 | x25519_pub=alice.x25519_pub.hex(), |
| 68 | ed25519_pub=alice.ed25519_pub.hex(), |
| 69 | ) |
| 70 | manifest = Manifest.new( |
| 71 | "test.txt", |
| 72 | content_hash(plaintext), |
| 73 | len(plaintext), |
| 74 | "issuer", |
| 75 | issuer.ed25519_pub.hex(), |
| 76 | recipient, |
| 77 | "http://localhost:8765", |
| 78 | "text/plain", |
| 79 | ) |
| 80 | manifest.policy["max_opens"] = 1 |
| 81 | for mode in ("REGISTRY", "HYBRID"): |
| 82 | try: |
| 83 | record_open(manifest, PolicyContext(mode=mode, registry_url="https://registry.test")) |
| 84 | except PolicyViolation as exc: |
| 85 | assert "refusing to fall back" in str(exc) |
| 86 | else: |
| 87 | raise AssertionError(f"{mode} should fail closed until implemented") |