Properly close popen

re6st/cli/conf.py

@@ -77,9 +77,10 @@ def main():
         print("WARNING: it is strongly recommended to use --fingerprint option.")
     network = x509.networkFromCa(ca)
     if config.is_needed:
-        route, err = subprocess.Popen(('ip', '-6', '-o', 'route', 'get',
+        with subprocess.Popen(('ip', '-6', '-o', 'route', 'get',
                                utils.ipFromBin(network)),
-                                      stdout=subprocess.PIPE).communicate()
+                              stdout=subprocess.PIPE) as proc:
+            route, err = proc.communicate()
             sys.exit(err or route and
                 utils.binFromIp(route.split()[8]).startswith(network))
 
@@ -90,7 +91,7 @@ def main():
     reserved = 'CN', 'serial'
     req = crypto.X509Req()
     try:
-        with open(cert_path) as f:
+        with open(cert_path, "rb") as f:
             cert = loadCert(f.read())
         components = dict(cert.get_subject().get_components())
         components = {k.decode(): v for k, v in components.items()}