Initial release of the oVirt/RHV Engine API simulator.

Stateful FastAPI lab with contract packs, Compose/Helm, Docker Hub release
targets, and Pulumi coverage across all Engine series (GET/POST/PUT/DELETE/HEAD).

app/security/auth.py

@@ -0,0 +1,35 @@
+"""Password hashing helpers for lab users."""
+
+from __future__ import annotations
+
+import base64
+import hashlib
+import hmac
+import secrets
+
+
+def _b64(value: bytes) -> str:
+    return base64.urlsafe_b64encode(value).rstrip(b"=").decode()
+
+
+def _unb64(value: str) -> bytes:
+    return base64.urlsafe_b64decode(value + "=" * (-len(value) % 4))
+
+
+def hash_secret(secret: str, *, salt: bytes | None = None) -> str:
+    actual_salt = salt or secrets.token_bytes(16)
+    digest = hashlib.scrypt(secret.encode(), salt=actual_salt, n=2**14, r=8, p=1, dklen=32)
+    return f"scrypt$16384$8$1${_b64(actual_salt)}${_b64(digest)}"
+
+
+def verify_secret(secret: str, encoded: str) -> bool:
+    try:
+        algorithm, n, r, p, salt, expected = encoded.split("$")
+        if algorithm != "scrypt":
+            return False
+        actual = hashlib.scrypt(
+            secret.encode(), salt=_unb64(salt), n=int(n), r=int(r), p=int(p), dklen=32
+        )
+        return hmac.compare_digest(actual, _unb64(expected))
+    except (ValueError, TypeError):
+        return False