The big Anavrins security update (round 1)

sys/autorun/welcome.lua

@@ -1,11 +1,45 @@
 local Config = require('config')
+local Util   = require('util')
 
-local shell = _ENV.shell
+local fs     = _G.fs
+local shell  = _ENV.shell
 
 local config = Config.load('os')
 if not config.welcomed and shell.openForegroundTab then
 	config.welcomed = true
+	config.securityUpdate = true
+	config.readNotes = 1
 	Config.update('os', config)
 
 	shell.openForegroundTab('Welcome')
 end
+
+if not config.securityUpdate then
+	config.securityUpdate = true
+	config.secretKey = nil
+	config.password = nil
+	config.readNotes = 1
+	Config.update('os', config)
+
+	fs.delete('usr/.known_hosts')
+
+	Util.writeFile('sys/notes_1.txt', [[
+An important security update has been applied.
+
+Unfortunately, this update has reset the
+password on the system. You can set a new
+password in System->System->Password.
+
+All computers that you connect to will also
+need to be updated as well.
+
+Thanks for your patience. And... thanks to
+Anavrins for the much improved security.
+	]])
+end
+
+if fs.exists('sys/notes_1.txt') and shell.openForegroundTab then
+	shell.openForegroundTab('edit sys/notes_1.txt')
+	os.sleep(2)
+	fs.delete('sys/notes_1.txt')
+end