wip: support for wireguard config generator

.gitignore

@@ -7,3 +7,4 @@ __pycache__/
 password.txt
 ssh_config_for_clients
 virsh_backup
+.wireguard_keys

README.md

@@ -6,3 +6,6 @@
     cd ansible/files/
     git clone git@git_atlantis_hub_content.atlantishq.de:FAUSheppy/atlantis-hub-content.git
 
+# Requires
+
+    apt install wireguard

wireguard.py

@@ -0,0 +1,56 @@
+import jinja2
+import subprocess
+import os
+
+key_cache_dir = ".wireguard_keys/"
+
+def generate_wireguard_keypair(hostname):
+
+    # create & sanity check filename & create dir #
+    assert(hostname.replace(".", "").isalnum())
+    filename = os.path.join(key_cache_dir, hostname)
+    os.makedirs(key_cache_dir, exist_ok=True)
+
+    # return cache if exists #
+    if os.path.isfile(filename):
+        with open(filename) as key_file:
+            return key_file.read().strip("\n").split(" ")
+
+    # otherwise generate private & public key #
+    private_key = subprocess.check_output(['wg', 'genkey']).strip()
+    public_key = subprocess.check_output(['wg', 'pubkey'], input=private_key).strip()
+
+    # encode
+    private_key = private_key.decode('utf-8')
+    public_key = public_key.decode('utf-8')
+
+    # save in key cache #
+    with open(filename, "w") as key_file:
+        key_file.write(private_key)
+        key_file.write(" ")
+        key_file.write(public_key)
+
+    return private_key, public_key
+
+
+def dump_config(vm_list):
+
+    vms_sorted_by_ip = sorted(vm_list, key=lambda x: x.ip)
+    clients = []
+
+    for vmo in vms_sorted_by_ip:
+
+        private_key, public_key = generate_wireguard_keypair(vmo.hostname)
+        clients.append({
+            "name" : vmo.hostname,
+            "private_key" : private_key
+            "public_key" : public_key
+        })
+
+    # dump wireguard vars for ansible #
+    with open("./ansible/vers/wireguard.yaml", "w") as f:
+        pass
+
+    # dump hypervisor config #
+    with open("/etc/wireguard/hypervisor.conf") as f:
+        pass