waybar: Add security key interaction notification

LICENSES/ISC.txt

@@ -0,0 +1,8 @@
+ISC License:
+
+Copyright (c) 2004-2010 by Internet Systems Consortium, Inc. ("ISC")
+Copyright (c) 1995-2003 by Internet Software Consortium
+
+Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

users/simon/modules/gpg.nix

@@ -27,4 +27,17 @@
     maxCacheTtl = 1800;
     maxCacheTtlSsh = maxCacheTtl;
   };
+
+  systemd.user.services.yubikey-touch-detector = {
+    Unit.PartOf = [ "sway-session.target" ];
+    Install.WantedBy = [ "sway-session.target" ];
+
+    Service = {
+      Environment = [
+        "PATH=${pkgs.gnupg}/bin"
+      ];
+      ExecStart = "${pkgs.yubikey-touch-detector}/bin/yubikey-touch-detector";
+      Restart = "on-failure";
+    };
+  };
 }

users/simon/modules/sway/waybar-interaction

@@ -0,0 +1,45 @@
+#! @bash@/bin/bash
+# shellcheck disable=SC2239
+# SPDX-FileCopyrightText: 2020 Maxim Baz <git@maximbaz.com>
+# SPDX-FileCopyrightText: 2023 Matthew Monaco <matt@monaco.cx>
+# SPDX-FileCopyrightText: 2024 Simon Bruder <simon@sbruder.de>
+#
+# SPDX-License-Identifier: ISC
+
+set -euo pipefail
+
+socket="${XDG_RUNTIME_DIR:-/run/user/$UID}/yubikey-touch-detector.socket"
+
+while true; do
+	touch_reasons=()
+
+	if [ ! -e "$socket" ]; then
+		printf '{"text": "Waiting for socket"}\n'
+		while [ ! -e "$socket" ]; do sleep 1; done
+	fi
+	printf '{"text": ""}\n'
+
+	while read -r -n5 cmd; do
+		reason="${cmd:0:3}"
+
+		if [ "${cmd:4:1}" = "1" ]; then
+			touch_reasons+=("$reason")
+		else
+			for i in "${!touch_reasons[@]}"; do
+				if [ "${touch_reasons[i]}" = "$reason" ]; then
+					unset 'touch_reasons[i]'
+					break
+				fi
+			done
+		fi
+
+		if [ "${#touch_reasons[@]}" -eq 0 ]; then
+			printf '{"text": ""}\n'
+		else
+			tooltip="Security key is waiting for a touch, reasons: ${touch_reasons[*]}"
+			printf '{"text": "󰈷", "tooltip": "%s"}\n' "$tooltip"
+		fi
+	done < <(@netcat@/bin/nc -U "$socket")
+
+	sleep 1
+done

users/simon/modules/sway/waybar.css

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2020-2022 Simon Bruder <simon@sbruder.de>
+ * SPDX-FileCopyrightText: 2020-2024 Simon Bruder <simon@sbruder.de>
  *
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
@@ -178,3 +178,13 @@ window#waybar {
   background-color: @base3@;
   color: @base00@;
 }
+
+#custom-interaction {
+  background-color: @yellow@;
+  color: @base03@;
+  animation-name: blink;
+  animation-duration: 0.5s;
+  animation-timing-function: cubic-bezier(1, 0, 0, 1);
+  animation-iteration-count: infinite;
+  animation-direction: alternate;
+}

users/simon/modules/sway/waybar.nix

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2020-2023 Simon Bruder <simon@sbruder.de>
+# SPDX-FileCopyrightText: 2020-2024 Simon Bruder <simon@sbruder.de>
 #
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
@@ -37,6 +37,7 @@ in
     ];
     modules-right = [
       "tray"
+      "custom/interaction"
       "custom/screencast"
       "custom/redshift"
       "idle_inhibitor"
@@ -81,6 +82,15 @@ in
         deactivated = "󰈉 ";
       };
     };
+    "custom/interaction" = {
+      exec = pkgs.substituteAll ({
+        src = ./waybar-interaction;
+      } // {
+        inherit (pkgs) netcat bash;
+        isExecutable = true;
+      });
+      return-type = "json";
+    };
     "custom/screencast" = {
       exec = pkgs.writeScript "screencast-monitor" /* python */ ''
         #!${pkgs.python3}/bin/python3