From fe347e1c77030c618399f181888f7cd11085cf1f Mon Sep 17 00:00:00 2001
From: Kevin Veen-Birkenbach <kevin@veen.world>
Date: Tue, 11 Apr 2023 21:21:06 +0200
Subject: [PATCH] Implemented wireguard for client

---
 playbook.yml                                  |  6 +++++
 roles/application-wireguard/README.md         | 22 +++++++++++++++++++
 roles/application-wireguard/handlers/main.yml |  6 +++++
 roles/application-wireguard/tasks/main.yml    | 18 +++++++++++++++
 4 files changed, 52 insertions(+)
 create mode 100644 roles/application-wireguard/README.md
 create mode 100644 roles/application-wireguard/handlers/main.yml
 create mode 100644 roles/application-wireguard/tasks/main.yml

diff --git a/playbook.yml b/playbook.yml
index ec15fe08..58402baf 100644
--- a/playbook.yml
+++ b/playbook.yml
@@ -7,6 +7,12 @@
     - application-caffeine
     - driver-non-free
 
+- name: application-wireguard
+  hosts: application_wireguard_hosts
+  become: true
+  roles:
+    - application-wireguard
+
 - name: collection-office
   hosts: collection_officetools_hosts
   become: true
diff --git a/roles/application-wireguard/README.md b/roles/application-wireguard/README.md
new file mode 100644
index 00000000..7e1cb3cf
--- /dev/null
+++ b/roles/application-wireguard/README.md
@@ -0,0 +1,22 @@
+# Role Native Wireguard
+Manages wireguard on a client.
+
+### Create Client Keys
+```bash
+  wg_private_key="$(wg genkey)"
+  wg_public_key="$(echo "$wg_private_key" | wg pubkey)"
+  echo "PrivateKey: $wg_private_key"
+  echo "PublicKey: $wg_public_key"
+  echo "PresharedKey: $(wg genpsk)"
+```
+
+## See
+- https://golb.hplar.ch/2019/01/expose-server-vpn.html
+- https://wiki.archlinux.org/index.php/WireGuard
+- https://wireguard.how/server/raspbian/
+- https://www.scaleuptech.com/de/blog/was-ist-und-wie-funktioniert-subnetting/
+- https://bodhilinux.boards.net/thread/450/wireguard-rtnetlink-answers-permission-denied
+- https://stackoverflow.com/questions/69140072/unable-to-ssh-into-wireguard-ip-until-i-ping-another-server-from-inside-the-serv
+- https://unix.stackexchange.com/questions/717172/why-is-ufw-blocking-acces-to-ssh-via-wireguard
+- https://forum.openwrt.org/t/cannot-ssh-to-clients-on-lan-when-accessing-router-via-wireguard-client/132709/3
+- https://serverfault.com/questions/1086297/wireguard-connection-dies-on-ubuntu-peer
\ No newline at end of file
diff --git a/roles/application-wireguard/handlers/main.yml b/roles/application-wireguard/handlers/main.yml
new file mode 100644
index 00000000..6127fc1c
--- /dev/null
+++ b/roles/application-wireguard/handlers/main.yml
@@ -0,0 +1,6 @@
+- name: "restart wireguard"
+  systemd:
+    name: wg-quick@wg0.service
+    state: restarted
+    enabled: yes
+    daemon_reload: yes
diff --git a/roles/application-wireguard/tasks/main.yml b/roles/application-wireguard/tasks/main.yml
new file mode 100644
index 00000000..82e2b6ae
--- /dev/null
+++ b/roles/application-wireguard/tasks/main.yml
@@ -0,0 +1,18 @@
+- name: install wireguard
+  pacman: 
+    name: wireguard-tools
+    state: present
+
+- name: enable ipv4-forwarding
+  shell: sysctl net.ipv4.ip_forward=1
+
+- name: enable ipv6-forwarding
+  shell: sysctl net.ipv6.conf.all.forwarding=1
+
+- name: create /etc/wireguard/wg0.conf
+  copy:
+    src: "{{ inventory_dir }}/files/{{ inventory_hostname }}/etc/wireguard/wg0.conf"
+    dest: /etc/wireguard/wg0.conf
+    owner: root
+    group: root
+  notify: restart wireguard