Add scan.ps1 script

marauder/scan.ps1

@@ -0,0 +1,113 @@
+# https://www.github.com/jamisonderek/flipper-zero-tutorials
+#
+# Pass short secret messages using SSIDs.
+# This script will scan for SSIDs that match the pattern of the encoded message.
+# The message is encoded using a simple cypher that uses the SSID as the key.
+#
+# Who you gonna call? "5552368" is: AL6fvOPr, BOI5O5Ag, CRU3Cjn7 or DUgPtAbN 
+
+# This is the list of allowed characters in the message.
+$dict = "0123456789ABCDEF-"
+
+# This is the list of allowed characters in the SSID.
+$cypherLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789".ToCharArray()
+
+# This is the list of SSIDs that were found, so we only display them once.
+$ssids = [System.Collections.Generic.List[string]]::new()
+
+Function Get-Encoded-SSID {
+  Param(
+    [Parameter(Mandatory=$true)]
+    [String]$Message,
+    [Parameter(Mandatory=$false)]
+    [String]$Prefix="0"
+  )
+  $letters = ($Prefix + $Message).ToCharArray()
+  $index = 0
+  $i = 1
+  $result = ""
+  foreach($letter in $letters) {
+    $ch = $dict.IndexOf($letter)
+    if ($ch -eq -1) {
+      Write-Host "Invalid character: $letter"
+      return
+    }
+    $index = $index + $ch
+    if ($index -ge $cypherLetters.Count) {
+      $index = $index - $cypherLetters.Count
+    }
+    $result = $result + $cypherLetters[$index]
+    $i = $i + 1
+    $index = $index + (([int][char]$cypherLetters[$index]) * $i)
+    $index = $index % $cypherLetters.Count
+  }
+  return $result
+}
+
+Function Get-Decoded-SSID {
+  Param(
+    [Parameter(Mandatory=$true)]
+    [String]$SSID
+  )
+  $letters = $SSID.ToCharArray()
+  $index = 0
+  $i = 1
+  $result = ""
+  foreach($letter in $letters) {
+    $ch = $cypherLetters.IndexOf($letter)
+    if ($ch -lt $index) {
+      $ch = $ch + $cypherLetters.Count
+    }
+    if (($ch - $index) -gt $dict.Length) {
+#      echo "Invalid character: $letter"
+      return
+    }
+    $result = $result + $dict[$ch - $index]
+    $i = $i + 1
+    $index = $ch
+    $index = $index + (([int][char]$cypherLetters[$index]) * $i)
+    $index = $index % $cypherLetters.Count
+  }
+  return $result.Substring(1)
+}
+
+Function Show-Available-Networks-UI {
+  explorer.exe ms-availablenetworks:
+  Start-Sleep 3
+}
+
+Function Get-SSIDS {
+    $networks = (netsh wlan show networks)
+    foreach($network in $networks) {
+        if($network -match "SSID") {
+            $ssid = $network.split(":")[1].trim()
+            if ($ssid.Length -gt 0) {
+              if ($ssids.Contains($ssid)) {
+                continue
+              }
+              $decoded = (Get-Decoded-SSID $ssid)
+              if ($decoded.Length -gt 0) {               
+                Write-Host ($ssid + ":                 " + $decoded) -ForegroundColor Green
+              } else {
+                Write-Host ($ssid + "-         NO MATCH") -ForegroundColor Red
+              }
+              $ssids.Add($ssid)
+            }
+        }
+    }
+}
+
+while ($true) {
+  Show-Available-Networks-UI
+  For( $i = 0; $i -le 6; ++$i ) {
+    Get-SSIDS
+    Write-Host "Sleeping..." -ForegroundColor Yellow -NoNewline
+    Start-Sleep 4
+    Write-Host "`b`b`b`b`b`b`b`b`b`b`b" -NoNewline
+    Write-Host "           " -NoNewline
+    Write-Host "`b`b`b`b`b`b`b`b`b`b`b" -NoNewline
+    Write-Host "Scanning..." -ForegroundColor Yellow -NoNewline
+    Start-Sleep 1
+    Write-Host "`b`b`b`b`b`b`b`b`b`b`b" -NoNewline
+  }
+}