src/main.py

@@ -2211,7 +2211,9 @@ async def create_passkey_registration_options(
     )
     rp_id, _origin = _passkey_relying_party(request)
     store = _passkey_store()
-    existing = await asyncio.to_thread(store.all)
+    existing = await asyncio.to_thread(
+        store.all, principal_id=request.state.dashboard_session.principal_id
+    )
     options, challenge = passkeys.registration_options(
         rp_id=rp_id,
         excluded=[item.credential_id for item in existing],
@@ -2284,6 +2286,7 @@ async def verify_passkey_registration(payload: PasskeyCeremony, request: Request
             sign_count=verified.sign_count,
             device_label=current.device_label,
             management_id=current.management_id,
+            principal_id=request.state.dashboard_session.principal_id,
         )
     except dashboard_auth.SessionStoreError:
         try:
@@ -2305,7 +2308,10 @@ async def verify_passkey_registration(payload: PasskeyCeremony, request: Request
 @app.get("/api/v1/passkeys")
 async def list_enrolled_passkeys(request: Request):
     try:
-        credentials = await asyncio.to_thread(_passkey_store().all)
+        credentials = await asyncio.to_thread(
+            _passkey_store().all,
+            principal_id=request.state.dashboard_session.principal_id,
+        )
         devices = await dashboard_auth.active_devices(request.state.dashboard_session)
     except dashboard_auth.SessionStoreError:
         return JSONResponse(
@@ -2352,7 +2358,11 @@ async def revoke_enrolled_passkey(
     )
     store = _passkey_store()
     try:
-        credential = await asyncio.to_thread(store.get_management_id, management_id)
+        credential = await asyncio.to_thread(
+            store.get_management_id,
+            management_id,
+            principal_id=request.state.dashboard_session.principal_id,
+        )
         devices = await dashboard_auth.active_devices(request.state.dashboard_session)
     except dashboard_auth.SessionStoreError:
         return JSONResponse(
@@ -2418,8 +2428,16 @@ async def revoke_enrolled_passkey(
 
 @app.post("/api/v1/passkeys/authentication/options")
 async def create_passkey_authentication_options(request: Request):
+    try:
+        principal_id, _principal_login = await _upstream_identity()
+    except Exception:
+        return JSONResponse(
+            {"detail": "Gitea identity is temporarily unavailable"},
+            status_code=503,
+            headers={"Cache-Control": "no-store", "Retry-After": "5"},
+        )
     store = _passkey_store()
-    credentials = await asyncio.to_thread(store.all)
+    credentials = await asyncio.to_thread(store.all, principal_id=principal_id)
     if not credentials:
         raise HTTPException(status_code=404, detail="No passkeys enrolled")
     peer_host = request.client.host if request.client is not None else "unknown"
@@ -2472,7 +2490,9 @@ async def create_passkey_authorization_options(
     payload: PasskeyAuthorizationTarget, request: Request
 ):
     store = _passkey_store()
-    credentials = await asyncio.to_thread(store.all)
+    credentials = await asyncio.to_thread(
+        store.all, principal_id=request.state.dashboard_session.principal_id
+    )
     if not credentials:
         raise HTTPException(status_code=404, detail="No passkeys enrolled")
     rp_id, _origin = _passkey_relying_party(request)
@@ -2509,7 +2529,11 @@ async def verify_passkey_authorization(
         action=payload.action,
         target=payload.target,
     )
-    stored = await asyncio.to_thread(store.get, credential_id)
+    stored = await asyncio.to_thread(
+        store.get,
+        credential_id,
+        principal_id=request.state.dashboard_session.principal_id,
+    )
     if not valid or stored is None:
         raise HTTPException(status_code=409, detail="Passkey challenge expired or already used")
     rp_id, origin = _passkey_relying_party(request)
@@ -2594,6 +2618,14 @@ async def verify_passkey_authentication(
             )
         raise HTTPException(status_code=400, detail="Invalid passkey ceremony")
     store = _passkey_store()
+    try:
+        principal_id, principal_login = await _upstream_identity()
+    except Exception:
+        return JSONResponse(
+            {"detail": "Gitea identity is temporarily unavailable"},
+            status_code=503,
+            headers={"Cache-Control": "no-store", "Retry-After": "5"},
+        )
     valid = await asyncio.to_thread(
         store.consume_challenge,
         challenge,
@@ -2602,7 +2634,9 @@ async def verify_passkey_authentication(
         action="sign_in",
         target="dashboard",
     )
-    stored = await asyncio.to_thread(store.get, credential_id)
+    stored = await asyncio.to_thread(
+        store.get, credential_id, principal_id=principal_id
+    )
     if not valid or stored is None:
         try:
             await asyncio.to_thread(attempts.record_failure, source)
@@ -2638,14 +2672,6 @@ async def verify_passkey_authentication(
                 target="sign_in:dashboard",
             )
             raise ValueError("stale passkey counter")
-        try:
-            principal_id, principal_login = await _upstream_identity()
-        except Exception:
-            return JSONResponse(
-                {"detail": "Gitea identity is temporarily unavailable"},
-                status_code=503,
-                headers={"Cache-Control": "no-store", "Retry-After": "5"},
-            )
         await dashboard_auth.revoke_managed_session(stored.management_id)
         signed, session = await asyncio.to_thread(
             dashboard_auth.issue_session,
@@ -4049,7 +4075,10 @@ async def sign_out_all_devices(
             headers={"Cache-Control": "no-store"},
         )
     try:
-        await asyncio.to_thread(_passkey_store().revoke_all_access)
+        await asyncio.to_thread(
+            _passkey_store().revoke_all_access,
+            principal_id=request.state.dashboard_session.principal_id,
+        )
     except dashboard_auth.SessionStoreError:
         return JSONResponse(
             {"detail": "Session registry is temporarily unavailable"},

src/passkey_store.py

@@ -18,6 +18,7 @@ class StoredPasskey:
     device_label: str
     management_id: str
     created_at: int
+    principal_id: int
 
 
 class PasskeyStore:
@@ -50,10 +51,19 @@ class PasskeyStore:
                     sign_count INTEGER NOT NULL,
                     device_label TEXT NOT NULL,
                     management_id TEXT NOT NULL UNIQUE,
-                    created_at INTEGER NOT NULL
+                    created_at INTEGER NOT NULL,
+                    principal_id INTEGER
                 )
                 """
             )
+            credential_columns = {
+                row[1]
+                for row in connection.execute("PRAGMA table_info(passkey_credentials)")
+            }
+            if "principal_id" not in credential_columns:
+                connection.execute(
+                    "ALTER TABLE passkey_credentials ADD COLUMN principal_id INTEGER"
+                )
             connection.execute(
                 """
                 CREATE TABLE IF NOT EXISTS passkey_challenges (
@@ -172,12 +182,14 @@ class PasskeyStore:
         sign_count: int,
         device_label: str,
         management_id: str,
+        principal_id: int,
     ) -> None:
         try:
             with self._connect() as connection:
                 connection.execute(
                     "INSERT INTO passkey_credentials(credential_id, public_key, sign_count, "
-                    "device_label, management_id, created_at) VALUES (?, ?, ?, ?, ?, ?)",
+                    "device_label, management_id, created_at, principal_id) "
+                    "VALUES (?, ?, ?, ?, ?, ?, ?)",
                     (
                         credential_id,
                         public_key,
@@ -185,41 +197,48 @@ class PasskeyStore:
                         device_label,
                         management_id,
                         int(self.clock()),
+                        principal_id,
                     ),
                 )
         except (OSError, sqlite3.Error) as exc:
             raise SessionStoreError("Passkey registry is temporarily unavailable") from exc
 
-    def all(self) -> list[StoredPasskey]:
+    def all(self, *, principal_id: int) -> list[StoredPasskey]:
         try:
             with self._connect() as connection:
                 rows = connection.execute(
-                    "SELECT credential_id, public_key, sign_count, device_label, management_id, created_at "
+                    "SELECT credential_id, public_key, sign_count, device_label, management_id, "
-                    "FROM passkey_credentials ORDER BY created_at DESC"
+                    "created_at, principal_id FROM passkey_credentials "
+                    "WHERE principal_id = ? ORDER BY created_at DESC",
+                    (principal_id,),
                 ).fetchall()
         except (OSError, sqlite3.Error) as exc:
             raise SessionStoreError("Passkey registry is temporarily unavailable") from exc
         return [StoredPasskey(*row) for row in rows]
 
-    def get(self, credential_id: bytes) -> StoredPasskey | None:
+    def get(self, credential_id: bytes, *, principal_id: int) -> StoredPasskey | None:
         try:
             with self._connect() as connection:
                 row = connection.execute(
-                    "SELECT credential_id, public_key, sign_count, device_label, management_id, created_at "
+                    "SELECT credential_id, public_key, sign_count, device_label, management_id, "
-                    "FROM passkey_credentials WHERE credential_id = ?",
+                    "created_at, principal_id FROM passkey_credentials "
-                    (credential_id,),
+                    "WHERE credential_id = ? AND principal_id = ?",
+                    (credential_id, principal_id),
                 ).fetchone()
         except (OSError, sqlite3.Error) as exc:
             raise SessionStoreError("Passkey registry is temporarily unavailable") from exc
         return StoredPasskey(*row) if row else None
 
-    def get_management_id(self, management_id: str) -> StoredPasskey | None:
+    def get_management_id(
+        self, management_id: str, *, principal_id: int
+    ) -> StoredPasskey | None:
         try:
             with self._connect() as connection:
                 row = connection.execute(
-                    "SELECT credential_id, public_key, sign_count, device_label, management_id, created_at "
+                    "SELECT credential_id, public_key, sign_count, device_label, management_id, "
-                    "FROM passkey_credentials WHERE management_id = ?",
+                    "created_at, principal_id FROM passkey_credentials "
-                    (management_id,),
+                    "WHERE management_id = ? AND principal_id = ?",
+                    (management_id, principal_id),
                 ).fetchone()
         except (OSError, sqlite3.Error) as exc:
             raise SessionStoreError("Passkey registry is temporarily unavailable") from exc
@@ -326,13 +345,22 @@ class PasskeyStore:
         except (OSError, sqlite3.Error) as exc:
             raise SessionStoreError("Session registry is temporarily unavailable") from exc
 
-    def revoke_all_access(self) -> None:
+    def revoke_all_access(self, *, principal_id: int) -> None:
-        """Atomically remove every passkey, challenge, grant, and active session."""
+        """Atomically remove one principal's passkeys, grants, and active sessions."""
         try:
             with self._connect() as connection:
-                connection.execute("DELETE FROM passkey_credentials")
+                connection.execute(
-                connection.execute("DELETE FROM passkey_challenges")
+                    "DELETE FROM passkey_credentials WHERE principal_id = ?",
-                connection.execute("DELETE FROM step_up_grants")
+                    (principal_id,),
-                connection.execute("DELETE FROM active_sessions")
+                )
+                connection.execute(
+                    "DELETE FROM step_up_grants WHERE session_hash IN ("
+                    "SELECT session_hash FROM active_sessions WHERE principal_id = ?)",
+                    (principal_id,),
+                )
+                connection.execute(
+                    "DELETE FROM active_sessions WHERE principal_id = ?",
+                    (principal_id,),
+                )
         except (OSError, sqlite3.Error) as exc:
             raise SessionStoreError("Session registry is temporarily unavailable") from exc

tests/test_access_revocation.py

@@ -6,6 +6,39 @@ from src.passkey_store import PasskeyStore
 from src.session_store import SessionStore, SessionStoreError
 
 
+def test_global_access_revocation_preserves_other_principal_credentials_and_sessions(
+    tmp_path,
+):
+    database = tmp_path / "sessions.sqlite3"
+    sessions = SessionStore(database, clock=lambda: 1_000.0)
+    passkeys = PasskeyStore(database, clock=lambda: 1_000.0)
+    for principal_id in (42, 84):
+        sessions.activate(
+            f"session-{principal_id}",
+            2_000,
+            management_id=f"management-{principal_id}",
+            principal_id=principal_id,
+            principal_login=f"operator-{principal_id}",
+        )
+        passkeys.register(
+            credential_id=f"credential-{principal_id}".encode(),
+            public_key=f"public-key-{principal_id}".encode(),
+            sign_count=0,
+            device_label=f"Device {principal_id}",
+            management_id=f"management-{principal_id}",
+            principal_id=principal_id,
+        )
+
+    passkeys.revoke_all_access(principal_id=42)
+
+    assert passkeys.all(principal_id=42) == []
+    assert [item.principal_id for item in passkeys.all(principal_id=84)] == [84]
+    with sqlite3.connect(database) as connection:
+        assert connection.execute(
+            "SELECT principal_id FROM active_sessions ORDER BY principal_id"
+        ).fetchall() == [(84,)]
+
+
 def test_global_access_revocation_rolls_back_every_credential_and_session_change(tmp_path):
     database = tmp_path / "sessions.sqlite3"
     sessions = SessionStore(database, clock=lambda: 1_000.0)
@@ -14,6 +47,8 @@ def test_global_access_revocation_rolls_back_every_credential_and_session_change
         2_000,
         management_id="phone-management-id",
         device_label="Phone",
+        principal_id=42,
+        principal_login="timmy",
     )
     sessions.mint_step_up(
         "phone-session",
@@ -28,6 +63,7 @@ def test_global_access_revocation_rolls_back_every_credential_and_session_change
         sign_count=0,
         device_label="Phone",
         management_id="phone-management-id",
+        principal_id=42,
     )
     passkeys.issue_challenge(
         b"pending-challenge",
@@ -43,7 +79,7 @@ def test_global_access_revocation_rolls_back_every_credential_and_session_change
         )
 
     with pytest.raises(SessionStoreError):
-        passkeys.revoke_all_access()
+        passkeys.revoke_all_access(principal_id=42)
 
     with sqlite3.connect(database) as connection:
         assert connection.execute("SELECT COUNT(*) FROM passkey_credentials").fetchone() == (1,)
@@ -76,6 +112,7 @@ def test_device_access_revocation_rolls_back_target_and_preserves_other_devices(
             sign_count=0,
             device_label=label,
             management_id=f"{slug}-management-id",
+            principal_id=42,
         )
     with sqlite3.connect(database) as connection:
         connection.execute(

tests/test_dashboard_auth.py

@@ -330,6 +330,56 @@ async def test_enrolled_passkey_can_sign_in_without_the_operator_token(
     assert "correct horse battery staple" not in signed_in.text
 
 
+@pytest.mark.anyio
+async def test_passkey_enrolled_for_another_upstream_principal_is_not_advertised(
+    access_control, monkeypatch
+):
+    identity = {"id": 42, "login": "timmy"}
+
+    async def upstream_user():
+        return dict(identity)
+
+    class VerifiedRegistration:
+        credential_id = b"phone-credential"
+        credential_public_key = b"credential-public-key"
+        sign_count = 0
+
+    monkeypatch.setattr(main, "current_user", upstream_user)
+    monkeypatch.setattr(
+        main.passkeys,
+        "verify_registration",
+        lambda **_kwargs: VerifiedRegistration(),
+    )
+    transport = httpx.ASGITransport(app=main.app)
+    async with httpx.AsyncClient(transport=transport, base_url="https://test") as owner:
+        await owner.post(
+            "/api/v1/session",
+            json={"access_token": "correct horse battery staple", "device_label": "Phone"},
+        )
+        headers = {
+            "Origin": "https://test",
+            "X-CSRF-Token": owner.cookies["stackchain_csrf"],
+        }
+        grant = await fresh_grant(owner, "enroll_passkey", "current_device")
+        options = await owner.post(
+            "/api/v1/passkeys/registration/options",
+            headers={**headers, "X-Step-Up-Grant": grant},
+        )
+        enrolled = await owner.post(
+            "/api/v1/passkeys/registration/verify",
+            json={"challenge": options.json()["challenge"], "credential": {"id": "fake"}},
+            headers=headers,
+        )
+
+    identity.update(id=84, login="other-operator")
+    async with httpx.AsyncClient(transport=transport, base_url="https://test") as other:
+        denied = await other.post("/api/v1/passkeys/authentication/options")
+
+    assert enrolled.status_code == 201
+    assert denied.status_code == 404
+    assert denied.json() == {"detail": "No passkeys enrolled"}
+
+
 @pytest.mark.anyio
 async def test_stale_nonzero_passkey_counter_denies_sign_in_and_records_anomaly(
     access_control, monkeypatch
@@ -349,6 +399,7 @@ async def test_stale_nonzero_passkey_counter_denies_sign_in_and_records_anomaly(
         sign_count=4,
         device_label="Phone",
         management_id="phone-management-id",
+        principal_id=42,
     )
     transport = httpx.ASGITransport(app=main.app)
     async with httpx.AsyncClient(transport=transport, base_url="https://test") as client:
@@ -391,6 +442,7 @@ async def test_stale_nonzero_passkey_counter_denies_fresh_authorization(
         sign_count=4,
         device_label="Phone",
         management_id="phone-management-id",
+        principal_id=42,
     )
     transport = httpx.ASGITransport(app=main.app)
     async with httpx.AsyncClient(transport=transport, base_url="https://test") as client:
@@ -438,6 +490,7 @@ async def test_passkey_options_are_source_limited_before_challenge_generation(
         sign_count=0,
         device_label="Phone",
         management_id="phone-management-id",
+        principal_id=42,
     )
     first_source = httpx.ASGITransport(app=main.app, client=("203.0.113.7", 1234))
     other_source = httpx.ASGITransport(app=main.app, client=("203.0.113.8", 1234))
@@ -470,6 +523,7 @@ async def test_failed_passkey_verification_consumes_the_shared_sign_in_budget(
         sign_count=0,
         device_label="Phone",
         management_id="phone-management-id",
+        principal_id=42,
     )
     transport = httpx.ASGITransport(app=main.app, client=("203.0.113.9", 1234))
 
@@ -520,6 +574,7 @@ async def test_successful_passkey_sign_in_clears_prior_source_failures(
         sign_count=0,
         device_label="Phone",
         management_id="phone-management-id",
+        principal_id=42,
     )
     source = "203.0.113.10"
     attempts = main._login_attempt_store()
@@ -713,6 +768,7 @@ async def test_device_revocation_failure_preserves_its_passkey_and_session(
             sign_count=0,
             device_label="Phone",
             management_id=phone_device["management_id"],
+            principal_id=42,
         )
         grant = await fresh_grant(
             laptop, "revoke_device", phone_device["management_id"]
@@ -783,6 +839,7 @@ async def test_orphaned_passkey_is_listed_safely_and_can_be_selectively_revoked(
         sign_count=0,
         device_label="Backup key",
         management_id="backup-management-id",
+        principal_id=42,
     )
 
     async with httpx.AsyncClient(transport=transport, base_url="https://test") as laptop:
@@ -863,6 +920,7 @@ async def test_removing_a_remote_passkey_also_revokes_its_active_session(access_
             sign_count=0,
             device_label="Phone",
             management_id=phone_device["management_id"],
+            principal_id=42,
         )
         grant = await fresh_grant(
             laptop, "revoke_passkey", phone_device["management_id"]
@@ -907,6 +965,7 @@ async def test_removing_the_current_passkey_keeps_the_current_session_active(acc
             sign_count=0,
             device_label="Laptop",
             management_id=current["management_id"],
+            principal_id=42,
         )
         grant = await fresh_grant(client, "revoke_passkey", current["management_id"])
         removed = await client.delete(
@@ -1878,7 +1937,7 @@ async def test_sign_out_all_devices_registry_failure_sets_no_cookies(access_cont
         grant = await fresh_grant(client, "revoke_all_sessions", "all")
 
         class BrokenStore:
-            def revoke_all_access(self):
+            def revoke_all_access(self, *, principal_id):
                 raise SessionStoreError("database path and secret details")
 
         monkeypatch.setattr(main, "_passkey_store", lambda: BrokenStore())
@@ -1915,6 +1974,7 @@ async def test_sign_out_all_devices_failure_preserves_passkeys_and_sessions(acce
             sign_count=0,
             device_label="Phone",
             management_id=device["management_id"],
+            principal_id=42,
         )
         grant = await fresh_grant(client, "revoke_all_sessions", "all")
         with sqlite3.connect(store.path) as connection:

tests/test_passkey_store.py

@@ -3,6 +3,50 @@ import sqlite3
 from src.passkey_store import PasskeyStore
 
 
+def test_credentials_are_bound_to_one_upstream_principal_and_legacy_rows_fail_closed(
+    tmp_path,
+):
+    database = tmp_path / "passkeys.sqlite3"
+    with sqlite3.connect(database) as connection:
+        connection.execute(
+            """
+            CREATE TABLE passkey_credentials (
+                credential_id BLOB PRIMARY KEY,
+                public_key BLOB NOT NULL,
+                sign_count INTEGER NOT NULL,
+                device_label TEXT NOT NULL,
+                management_id TEXT NOT NULL UNIQUE,
+                created_at INTEGER NOT NULL
+            )
+            """
+        )
+        connection.execute(
+            "INSERT INTO passkey_credentials VALUES (?, ?, ?, ?, ?, ?)",
+            (b"legacy", b"legacy-key", 0, "Old phone", "legacy-management", 900),
+        )
+
+    store = PasskeyStore(database, clock=lambda: 1_000.0)
+    store.register(
+        credential_id=b"principal-101",
+        public_key=b"public-key",
+        sign_count=0,
+        device_label="Phone",
+        management_id="phone-management",
+        principal_id=101,
+    )
+
+    assert [item.credential_id for item in store.all(principal_id=101)] == [b"principal-101"]
+    assert store.all(principal_id=202) == []
+    assert store.get(b"principal-101", principal_id=101).principal_id == 101
+    assert store.get(b"principal-101", principal_id=202) is None
+    assert store.get(b"legacy", principal_id=101) is None
+    with sqlite3.connect(database) as connection:
+        assert connection.execute(
+            "SELECT principal_id FROM passkey_credentials WHERE credential_id = ?",
+            (b"legacy",),
+        ).fetchone() == (None,)
+
+
 def test_active_challenges_are_bounded_per_source_and_globally_across_instances(tmp_path):
     now = [1_000.0]
     database = tmp_path / "passkeys.sqlite3"
@@ -116,11 +160,12 @@ def test_passkey_counter_advancement_is_atomic_across_store_instances(tmp_path):
         sign_count=4,
         device_label="Phone",
         management_id="phone-management-id",
+        principal_id=42,
     )
 
     assert first.advance_counter(b"phone-credential", expected=4, new=5) is True
     assert second.advance_counter(b"phone-credential", expected=4, new=5) is False
-    assert first.get(b"phone-credential").sign_count == 5
+    assert first.get(b"phone-credential", principal_id=42).sign_count == 5
 
 
 def test_passkey_counter_rejects_non_advancing_values_but_supports_counterless_devices(
@@ -133,6 +178,7 @@ def test_passkey_counter_rejects_non_advancing_values_but_supports_counterless_d
         sign_count=4,
         device_label="Phone",
         management_id="phone-management-id",
+        principal_id=42,
     )
     store.register(
         credential_id=b"counterless-credential",
@@ -140,6 +186,7 @@ def test_passkey_counter_rejects_non_advancing_values_but_supports_counterless_d
         sign_count=0,
         device_label="Security key",
         management_id="counterless-management-id",
+        principal_id=42,
     )
 
     assert store.advance_counter(b"phone-credential", expected=4, new=4) is False

tests/test_security_activity.py

@@ -158,7 +158,7 @@ async def test_passkey_enrollment_reservation_failure_preserves_registry(
 
     assert enrolled.status_code == 503
     assert enrolled.json() == {"detail": "Security activity is temporarily unavailable"}
-    assert main._passkey_store().all() == []
+    assert main._passkey_store().all(principal_id=42) == []
 
 
 @pytest.mark.anyio