Add wireguard configuration to dotfiles roleHEADmaster

This is a simple role that works only for one host. There are multiple
complications that I should keep in mind in the future.

* There is should be a way to install dotfiles on boxes without GPG key
  there. So, files with secrets in them should be gated.
* Wireguard configuration should be per host. Each host should have it
  is own private key.

4 files changed, 64 insertions, 0 deletions

diff --git a/misc/dotfiles/wireguard/onion-dns-down.sh b/misc/dotfiles/wireguard/onion-dns-down.sh
new file mode 100755
index 0000000..b271700
--- /dev/null
+++ b/misc/dotfiles/wireguard/onion-dns-down.sh
@@ -0,0 +1,7 @@
+#! /usr/bin/env sh
+
+iface=$1
+
+/usr/sbin/scutil <<EOF
+remove State:/Network/Service/$iface/DNS
+EOF
diff --git a/misc/dotfiles/wireguard/onion-dns-up.sh b/misc/dotfiles/wireguard/onion-dns-up.sh
new file mode 100755
index 0000000..d8f69b9
--- /dev/null
+++ b/misc/dotfiles/wireguard/onion-dns-up.sh
@@ -0,0 +1,18 @@
+#! /usr/bin/env sh
+
+# macOS as usual has it is own way to do DNS. Even when we set DNS in
+# WireGuard config, onion addresses will not be resolved anyway. Moreover,
+# nslookup (and probably other standard cli utilities will work properly), but
+# Firefox at the same time will not.
+# The only workaround I found it to set `SupplementalMatchDomains` manually
+# with `scutil`. This trick worked for OpenVPN for long time as well.
+
+iface=$1
+dns=$2
+
+scutil <<EOF
+d.init
+d.add ServerAddresses * $dns
+d.add SupplementalMatchDomains * onion
+set State:/Network/Service/$iface/DNS
+EOF
diff --git a/misc/dotfiles/wireguard/wgtor0.conf b/misc/dotfiles/wireguard/wgtor0.conf
new file mode 100644
index 0000000..3f217c3
--- /dev/null
+++ b/misc/dotfiles/wireguard/wgtor0.conf
@@ -0,0 +1,22 @@
+$ANSIBLE_VAULT;1.1;AES256
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diff --git a/misc/dotfiles/wireguard/wgvpn0.conf b/misc/dotfiles/wireguard/wgvpn0.conf
new file mode 100644
index 0000000..97691b7
--- /dev/null
+++ b/misc/dotfiles/wireguard/wgvpn0.conf
@@ -0,0 +1,17 @@
+$ANSIBLE_VAULT;1.1;AES256
+61366266653839616332383237343332373262313963343564636431336533303034346434636233
+3037376439386635323531333838366564303565663535390a383763623731323633396433326237
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