From 53103be32469cd58f0eafff64dbaa4a34fd29a3f Mon Sep 17 00:00:00 2001
From: Christian Hesse <mail@eworm.de>
Date: Tue, 14 Nov 2023 10:31:40 +0100
Subject: daily-psk: support new wifi package

---
 daily-psk.wifi.rsc | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 daily-psk.wifi.rsc

(limited to 'daily-psk.wifi.rsc')

diff --git a/daily-psk.wifi.rsc b/daily-psk.wifi.rsc
new file mode 100644
index 0000000..a8b1320
--- /dev/null
+++ b/daily-psk.wifi.rsc
@@ -0,0 +1,85 @@
+#!rsc by RouterOS
+# RouterOS script: daily-psk.wifi
+# Copyright (c) 2013-2023 Christian Hesse <mail@eworm.de>
+#                         Michael Gisbers <michael@gisbers.de>
+# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
+#
+# update daily PSK (pre shared key)
+# https://git.eworm.de/cgit/routeros-scripts/about/doc/daily-psk.md
+#
+# !! Do not edit this file, it is generated from template!
+
+:local 0 "daily-psk.wifi";
+:global GlobalFunctionsReady;
+:while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
+
+:global DailyPskMatchComment;
+:global DailyPskQrCodeUrl;
+:global Identity;
+
+:global FormatLine;
+:global LogPrintExit2;
+:global ScriptLock;
+:global SendNotification2;
+:global SymbolForNotification;
+:global UrlEncode;
+:global WaitForFile;
+:global WaitFullyConnected;
+
+$ScriptLock $0;
+$WaitFullyConnected;
+
+# return pseudo-random string for PSK
+:local GeneratePSK do={
+  :local Date [ :tostr $1 ];
+
+  :global DailyPskSecrets;
+
+  :global ParseDate;
+
+  :set Date [ $ParseDate $Date ];
+
+  :local A ((14 - ($Date->"month")) / 12);
+  :local B (($Date->"year") - $A);
+  :local C (($Date->"month") + 12 * $A - 2);
+  :local WeekDay (7000 + ($Date->"day") + $B + ($B / 4) - ($B / 100) + ($B / 400) + ((31 * $C) / 12));
+  :set WeekDay ($WeekDay - (($WeekDay / 7) * 7));
+
+  :return (($DailyPskSecrets->0->(($Date->"day") - 1)) . \
+    ($DailyPskSecrets->1->(($Date->"month") - 1)) . \
+    ($DailyPskSecrets->2->$WeekDay));
+}
+
+:local Seen ({});
+:local Date [ /system/clock/get date ];
+:local NewPsk [ $GeneratePSK $Date ];
+
+:foreach AccList in=[ /interface/wifi/access-list/find where comment~$DailyPskMatchComment ] do={
+  :local SsidRegExp [ /interface/wifi/access-list/get $AccList ssid-regexp ];
+  :local Configuration ([ /interface/wifi/configuration/find where ssid~$SsidRegExp ]->0);
+  :local Ssid [ /interface/wifi/configuration/get $Configuration ssid ];
+  :local OldPsk [ /interface/wifi/access-list/get $AccList passphrase ];
+  :local Skip 0;
+
+  :if ($NewPsk != $OldPsk) do={
+    $LogPrintExit2 info $0 ("Updating daily PSK for " . $Ssid . " to " . $NewPsk . " (was " . $OldPsk . ")") false;
+    /interface/wifi/access-list/set $AccList passphrase=$NewPsk;
+
+    :if ([ :len [ /interface/wifi/actual-configuration/find where configuration.ssid=$Ssid ] ] > 0) do={
+      :if ($Seen->$Ssid = 1) do={
+        $LogPrintExit2 debug $0 ("Already sent a mail for SSID " . $Ssid . ", skipping.") false;
+      } else={
+        :local Link ($DailyPskQrCodeUrl . \
+            "?scale=8&level=1&ssid=" . [ $UrlEncode $Ssid ] . "&pass=" . [ $UrlEncode $NewPsk ]);
+        $SendNotification2 ({ origin=$0; \
+          subject=([ $SymbolForNotification "calendar" ] . "daily PSK " . $Ssid); \
+          message=("This is the daily PSK on " . $Identity . ":\n\n" . \
+            [ $FormatLine "SSID" $Ssid ] . "\n" . \
+            [ $FormatLine "PSK" $NewPsk ] . "\n" . \
+            [ $FormatLine "Date" $Date ] . "\n\n" . \
+            "A client device specific rule must not exist!"); link=$Link });
+        :set ($Seen->$Ssid) 1;
+      }
+    }
+  }
+}
-- 
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