CreateUser.ps1

function New-USBKey {
    param (
        [string]$prefix = "USBID",
        [int]$GUIDLength = 8
    )

    if ($GUIDLength -lt 1) {
        $GUIDLength = 8
    }

    if ($GUIDLength -gt 32) {
        $GUIDLength = 32
    }

    $dateTime = Get-Date -Format "yyyyMMdd-HHmmss"

    $guid = [System.Guid]::NewGuid().ToString().Replace("-", "").Substring(0, $GUIDLength).ToUpper()

    $hashData = [System.Text.Encoding]::UTF8.GetBytes($prefix + $guid)
    $sha256 = [System.Security.Cryptography.SHA256]::Create()
    $hash = [BitConverter]::ToString($sha256.ComputeHash($hashData)).Replace("-", "").Substring(0, 10)

    # Construct the key in the format: PREFIX-YYYYMMDD-HHMMSS-HASH-GUID
    $key = "$prefix-$dateTime-$hash-$guid".ToUpper()

    return $key
}


function New-EncryptedData {
    param (
        [string]$username,
        [string]$password
    )

    # create aes key
    $key = [byte[]](1..32 | ForEach-Object { Get-Random -Max 256 })

    # convert to byte array
    $credentialBytes = [System.Text.Encoding]::UTF8.GetBytes("$username`n$password")

    # encrypt
    $aes = [System.Security.Cryptography.Aes]::Create()
    $aes.Key = $key
    $aes.GenerateIV()

    $encryptor = $aes.CreateEncryptor()
    $encryptedCredentials = $encryptor.TransformFinalBlock($credentialBytes, 0, $credentialBytes.Length)

    # convert to base64
    $keyText = [System.Convert]::ToBase64String($key)
    $ivText = [System.Convert]::ToBase64String($aes.IV)
    $encryptedText = [System.Convert]::ToBase64String($encryptedCredentials)

    return @{
        Key           = $keyText
        IV            = $ivText
        EncryptedData = $encryptedText
    }
}

#$USBKey = New-USBKey
$EncryptedData = New-EncryptedData -username "Admin" -password "zaq1@WSX"

# $USBLetter = "G:"
# $EncryptedData.Key | Out-File "$USBLetter\aes_key.bin"
# $EncryptedData.IV | Out-File "$USBLetter\aes_iv.bin"
# $EncryptedData.EncryptedData | Out-File "$USBLetter\credentials.enc"

# save to database
$SQLQuery = "INSERT INTO Users (USBKey, AESKey, AESIV, EncryptedData) VALUES ('$USBKey', '$($EncryptedData.Key)', '$($EncryptedData.IV)', '$($EncryptedData.EncryptedData)')"
Write-Host $SQLQuery



# create usb key file and hide it
#$USBLetter = "F:"
#$USBKey | Out-File "$USBLetter\.usbkeyfile"
#[System.IO.File]::SetAttributes("$USBLetter\.usbkeyfile", "Hidden, System")