36 lines
1.4 KiB
PowerShell
36 lines
1.4 KiB
PowerShell
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function Get-DecryptedCpassword {
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[CmdletBinding()]
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Param (
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[string] $Cpassword
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)
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try {
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#Append appropriate padding based on string length
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$Mod = ($Cpassword.length % 4)
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switch ($Mod) {
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'1' {$Cpassword = $Cpassword.Substring(0,$Cpassword.Length -1)}
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'2' {$Cpassword += ('=' * (4 - $Mod))}
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'3' {$Cpassword += ('=' * (4 - $Mod))}
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}
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$Base64Decoded = [Convert]::FromBase64String($Cpassword)
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#Create a new AES .NET Crypto Object
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$AesObject = New-Object System.Security.Cryptography.AesCryptoServiceProvider
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[Byte[]] $AesKey = @(0x4e,0x99,0x06,0xe8,0xfc,0xb6,0x6c,0xc9,0xfa,0xf4,0x93,0x10,0x62,0x0f,0xfe,0xe8,
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0xf4,0x96,0xe8,0x06,0xcc,0x05,0x79,0x90,0x20,0x9b,0x09,0xa4,0x33,0xb6,0x6c,0x1b)
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#Set IV to all nulls to prevent dynamic generation of IV value
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$AesIV = New-Object Byte[]($AesObject.IV.Length)
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$AesObject.IV = $AesIV
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$AesObject.Key = $AesKey
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$DecryptorObject = $AesObject.CreateDecryptor()
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[Byte[]] $OutBlock = $DecryptorObject.TransformFinalBlock($Base64Decoded, 0, $Base64Decoded.length)
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Write-Host $OutBlock # <----- Only had to add this line
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return [System.Text.UnicodeEncoding]::Unicode.GetString($OutBlock)
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}
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catch {Write-Error $Error[0]}
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}
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