[Windows 8] Show passwords of Wi-Fi profiles in clear-text

show-wifi-passwords.ps1

(netsh wlan show profiles) |                                                # Fetch all Wi-Fi profiles
    Select-String "\:(.+)$" |                                               # Grab the profile name (note: not necessarily equal to SSID)
    %{$name=$_.Matches.Groups[1].Value.Trim(); $_} |                        # Store profile name to a var
    %{(netsh wlan show profile name="$name" key=clear)} |                   # Fetch profile details with clear-text password
    Select-String "Key Content\W+\:(.+)$" |                                 # Grab the password
    %{$pass=$_.Matches.Groups[1].Value.Trim(); $_} |                        # Store password to a var
    %{[PSCustomObject]@{ PROFILE_NAME=$name;PASSWORD=$pass }} |             # Construct an object to be able to use Format-Table
    Format-Table -AutoSize                                                  # Format the output

Write-Host ""
Write-Host "Press any key to continue..."
Read-Host

Is this Windows 8 only? I get an error sometimes on various computers that are Windows 7.

Cannot index into a null array.
At F:\show-wifi-passwords.ps1.ps1:66 char:82

• (netsh wlan show profiles) | Select-String ":(.+)$" | %{$name=$.Matches.Groups[ <<<< 1].Value.Trim();$} |
  %{(netsh wlan show profile name="$name" key=clear)} | Select-String "Key Content\W+:(.+)$" | %{$pass=$.Matches.Groups[1].Value.Trim(); $} | %{
  [PSCustomObject]@{ PROFILE_NAME=$name;PASSWORD=$pass }} -erroraction Continue | Format-Table -AutoSize
  • CategoryInfo : InvalidOperation: (1:Int32) [], RuntimeException
  • FullyQualifiedErrorId : NullArray

@randomuser1234 Yeah, this was crafted on Windows 8 and haven't tested it on Windows 7 at all. My guess is that some underlying APIs or PowerShell versions are slightly different.