#Written by Donald Phillips
#https://github.rackspace.com/adam5185/dpsecuritypci/blob/master/Create_Install_XML.ps1

#Initially create the XML file based on the documentation from FortiSIEM wiki: https://one.rackspace.com/display/gss/FortiSIEM+Windows+Agent+PCI+Playbook
$CreateXML = New-Item -Path C:\Windows\Temp\FortiSIEM\InstallSettings.xml -ItemType File
#Modify the XML by adding the content as seen within the ' ' below. 
$ModifyXML = Set-Content -Path C:\Windows\Temp\FortiSIEM\InstallSettings.xml -value `
'<InstallConfig Version="1"> 
   <Org>
      <ID>1</ID>
      <Name>Super</Name>
   </Org>
   <Super>
      <Name>supervisor.prod.isiem.rackspace.net</Name>
      <Port>443</Port>
   </Super>
   <HostName>DomainName</HostName>
   <Registration>
      <Username>Super/ISIEMAgentAdmin</Username>
      <Password>nPv@t4jF</Password>
   </Registration>
   <Proxy />
   <SSLCertificate>ignore</SSLCertificate>
</InstallConfig>'

#Identify FQDN for input to XML File "HostName"
$FQDN = (Get-WmiObject win32_computersystem).DNSHostName+"."+(Get-WmiObject win32_computersystem).Domain

#Grab XML and input to PowerShell for readability
[xml]$InstallXML = Get-Content C:\Windows\Temp\FortiSIEM\InstallSettings.xml
#Modify the Default HostName value from "Domain Name" to the server's FQDN
$InstallXML.InstallConfig.Hostname = $FQDN
#Save the XML and exit the editing process with XML fully configured
$InstallXML.Save("C:\Windows\Temp\FortiSIEM\InstallSettings.xml")