From 5aca4bf06e48eaa0b3ec3366d9125f4f0f86af1d Mon Sep 17 00:00:00 2001
From: dabruh <11458706-dabruh@users.noreply.gitlab.com>
Date: Sun, 5 Jun 2022 00:10:25 +0200
Subject: [PATCH] First POC.

---
 powershell/BankIDClipboardWatcher.ps1 | 39 +++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 powershell/BankIDClipboardWatcher.ps1

diff --git a/powershell/BankIDClipboardWatcher.ps1 b/powershell/BankIDClipboardWatcher.ps1
new file mode 100644
index 0000000..4be48e8
--- /dev/null
+++ b/powershell/BankIDClipboardWatcher.ps1
@@ -0,0 +1,39 @@
+function Get-Hash([string]$textToHash) {
+    $hasher = new-object System.Security.Cryptography.MD5CryptoServiceProvider
+    $toHash = [System.Text.Encoding]::UTF8.GetBytes($textToHash)
+    $hashByteArray = $hasher.ComputeHash($toHash)
+
+    foreach($byte in $hashByteArray){
+        $result += "{0:X2}" -f $byte
+    }
+
+    return $result;
+}
+
+$ClearClipboard = $true
+$PreviousHash = Get-Hash(Get-Clipboard)
+
+while ($true) {
+    $Clipboard = Get-Clipboard
+    $ClipboardHash = Get-Hash($Clipboard)
+
+    if ($ClipboardHash -eq $PreviousHash) {
+        Write-Host "NOCHG"
+        Start-Sleep -Milliseconds 250
+        Continue
+    }
+    elseif ($Clipboard -match '^bankid:\/\/\/') {
+        Write-Host $Clipboard
+        start "$Clipboard"
+    }
+    else {
+        Write-Host "CHG"
+    }
+
+    if ($ClearClipboard) {
+        Set-Clipboard -Value $null
+    }
+
+    $PreviousHash = Get-Hash($Clipboard)
+    Start-Sleep -Milliseconds 250
+}