From 2e6f478a665f021602cc7622d2443b2a3bebf087 Mon Sep 17 00:00:00 2001
From: Pierre-Yves Chibon <pingou@pingoured.fr>
Date: May 18 2017 09:07:16 +0000
Subject: Move from crypto to cryptography since we're using it elsewhere


---

diff --git a/pagure/hooks/mirror_hook.py b/pagure/hooks/mirror_hook.py
index 39008a0..bcb531f 100644
--- a/pagure/hooks/mirror_hook.py
+++ b/pagure/hooks/mirror_hook.py
@@ -16,7 +16,10 @@ import pygit2
 import werkzeug
 import wtforms
 
-from Crypto.PublicKey import RSA
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives.asymmetric import rsa
+from cryptography.hazmat.primitives import serialization
+
 from flask.ext import wtf
 from sqlalchemy.orm import relation
 from sqlalchemy.orm import backref
@@ -65,10 +68,25 @@ def create_ssh_key(keyfile):
     be in a similar file name ending with a '.pub'.
 
     '''
-    key = RSA.generate(2048)
+    private_key = rsa.generate_private_key(
+        public_exponent=65537,
+        key_size=4096,
+        backend=default_backend()
+    )
+
+    pem = private_key.private_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PrivateFormat.TraditionalOpenSSL,
+        encryption_algorithm=serialization.NoEncryption()
+    )
     with open(keyfile, 'w') as stream:
-        stream.write(key.exportKey('PEM'))
+        stream.write(pem)
 
+    public_key = private_key.public_key()
+    pem = public_key.public_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PublicFormat.SubjectPublicKeyInfo
+    )
     with open(keyfile + '.pub', 'w') as stream:
         stream.write(key.exportKey('OpenSSH'))