fix: corrige 6 bugs mineurs (BUG-035 a BUG-040)

tests/test_auth.py

@@ -44,6 +44,22 @@ class TestPasswordHashing:
         result = hash_password("ab")
         assert result is not None
 
+    def test_argon2_memory_recalibrated(self):
+        """BUG-038: memory cost must stay at the OWASP 19 MiB recommendation."""
+        from backend.auth.password import (
+            ARGON2_MEMORY_COST_KIB,
+            ARGON2_PARALLELISM,
+            ARGON2_TIME_COST,
+            ph,
+        )
+
+        assert ARGON2_MEMORY_COST_KIB == 19456
+        assert ARGON2_TIME_COST == 2
+        assert ARGON2_PARALLELISM == 1
+        assert ph.memory_cost == 19456
+        assert ph.time_cost == 2
+        assert ph.parallelism == 1
+
 
 # ═══════════════════════════════════════════════════════════════════
 # JWT Handler
@@ -279,3 +295,61 @@ class TestMiddleware:
         assert check_vault_access("Vault1", user) is True
         assert check_vault_access("Vault3", user) is False
         assert check_vault_access("Vault1", nobody) is False
+
+
+# ═══════════════════════════════════════════════════════════════════
+# Insecure (auth-disabled) deployment guard — BUG-037
+# ═══════════════════════════════════════════════════════════════════
+
+class TestInsecureAuthGuard:
+    def test_is_loopback_host(self):
+        from backend.auth.middleware import is_loopback_host
+
+        assert is_loopback_host(None) is True
+        assert is_loopback_host("127.0.0.1") is True
+        assert is_loopback_host("::1") is True
+        assert is_loopback_host("[::1]") is True
+        assert is_loopback_host("localhost") is True
+        assert is_loopback_host("0.0.0.0") is False
+        assert is_loopback_host("192.168.1.10") is False
+
+    def test_bind_host_from_argv(self):
+        from backend.auth.middleware import bind_host_from_argv
+
+        assert bind_host_from_argv(
+            ["uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "8080"]
+        ) == "0.0.0.0"
+        assert bind_host_from_argv(["uvicorn", "app", "--host=127.0.0.1"]) == "127.0.0.1"
+        assert bind_host_from_argv(["uvicorn", "app"]) is None
+
+    def test_guard_refuses_public_bind_without_optin(self, monkeypatch):
+        from backend import main
+
+        monkeypatch.setenv("OBSIGATE_AUTH_ENABLED", "false")
+        monkeypatch.delenv("OBSIGATE_ALLOW_INSECURE", raising=False)
+        monkeypatch.setattr("sys.argv", ["uvicorn", "backend.main:app", "--host", "0.0.0.0"])
+        with pytest.raises(RuntimeError):
+            main._guard_insecure_auth()
+
+    def test_guard_allows_loopback(self, monkeypatch):
+        from backend import main
+
+        monkeypatch.setenv("OBSIGATE_AUTH_ENABLED", "false")
+        monkeypatch.delenv("OBSIGATE_ALLOW_INSECURE", raising=False)
+        monkeypatch.setattr("sys.argv", ["uvicorn", "backend.main:app", "--host", "127.0.0.1"])
+        main._guard_insecure_auth()  # must not raise
+
+    def test_guard_allows_explicit_optin(self, monkeypatch):
+        from backend import main
+
+        monkeypatch.setenv("OBSIGATE_AUTH_ENABLED", "false")
+        monkeypatch.setenv("OBSIGATE_ALLOW_INSECURE", "true")
+        monkeypatch.setattr("sys.argv", ["uvicorn", "backend.main:app", "--host", "0.0.0.0"])
+        main._guard_insecure_auth()  # must not raise
+
+    def test_guard_noop_when_auth_enabled(self, monkeypatch):
+        from backend import main
+
+        monkeypatch.setenv("OBSIGATE_AUTH_ENABLED", "true")
+        monkeypatch.setattr("sys.argv", ["uvicorn", "backend.main:app", "--host", "0.0.0.0"])
+        main._guard_insecure_auth()  # must not raise