migrated api to database-config (Site, Instance)

app/util.py

@@ -16,6 +16,18 @@ def load_key(filename) -> "RsaKey":
     return RSA.import_key(extern_key=load_file(filename), passphrase=None)
 
 
+def parse_key(content: bytes) -> "RsaKey":
+    try:
+        # Crypto | Cryptodome on Debian
+        from Crypto.PublicKey import RSA
+        from Crypto.PublicKey.RSA import RsaKey
+    except ModuleNotFoundError:
+        from Cryptodome.PublicKey import RSA
+        from Cryptodome.PublicKey.RSA import RsaKey
+
+    return RSA.import_key(extern_key=content, passphrase=None)
+
+
 def generate_key() -> "RsaKey":
     try:
         # Crypto | Cryptodome on Debian