Image info, endpoint encryption

bot/db/encryption.py

@@ -0,0 +1,25 @@
+from cryptography.fernet import Fernet
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
+import base64
+from bot.config import ENCRYPTION_KEY, BARS_APP_ID
+
+
+fernet = Fernet(
+    base64.urlsafe_b64encode(
+        PBKDF2HMAC(
+            algorithm=hashes.SHA256(),
+            length=32,
+            iterations=390000,
+            salt=BARS_APP_ID.encode()
+        ).derive(ENCRYPTION_KEY)
+    )
+)
+
+
+def encrypt(s: str) -> bytes:
+    return fernet.encrypt(s.encode())
+
+
+def decrypt(s: bytes) -> str:
+    return fernet.decrypt(s).decode()