Better error on v2 load bad key

pytor/onion.py

@@ -180,6 +180,10 @@ class OnionV2(Onion):
 
     def set_private_key(self, key: bytes) -> None:
         'Add private key'
+        if not key.startswith(b'-----BEGIN RSA PRIVATE KEY-----'):
+            raise Exception(
+                'Private key does not seems to be a valid RSA PEM key'
+            )
         self._save_keypair(RSA.importKey(key.strip()))
 
     def _get_private_key_has_native(self) -> bytes:

setup.py

@@ -6,7 +6,7 @@ from setuptools import setup
 setup(
     name='pytor',
 
-    version='0.1.3',
+    version='0.1.4',
 
     packages=find_packages(),