如何在Powershell中应用加密/解密？

Add-Type -AssemblyName System.Security

$encryptionKey = [System.Security.Cryptography.RijndaelManaged]::GenerateKey()

$encryptionKeyBase64 = [System.Convert]::ToBase64String($encryptionKey)

$plainText = "要加密的数据"
$plainBytes = [System.Text.Encoding]::UTF8.GetBytes($plainText)

$rijndaelManaged = New-Object System.Security.Cryptography.RijndaelManaged
$rijndaelManaged.Key = $encryptionKey
$rijndaelManaged.GenerateIV()

$encryptor = $rijndaelManaged.CreateEncryptor()
$encryptedBytes = $encryptor.TransformFinalBlock($plainBytes, 0, $plainBytes.Length)

$encryptedText = [System.Convert]::ToBase64String($encryptedBytes)

$encryptedBytes = [System.Convert]::FromBase64String($encryptedText)

$rijndaelManaged = New-Object System.Security.Cryptography.RijndaelManaged
$rijndaelManaged.Key = $encryptionKey
$rijndaelManaged.IV = $iv

$decryptor = $rijndaelManaged.CreateDecryptor()
$decryptedBytes = $decryptor.TransformFinalBlock($encryptedBytes, 0, $encryptedBytes.Length)

$decryptedText = [System.Text.Encoding]::UTF8.GetString($decryptedBytes)