我有几个加密的文件,使用的是PowerShell脚本,使用的是ConvertTo-SecureString,使用的AES-256如下所示:
$secretKey = "thisIsAnExampleButNotTheRealKey2"
$cleBytes = [System.Text.Encoding]::UTF8.GetBytes($secretKey)
$aes = New-Object System.Security.Cryptography.AesCryptoServiceProvider
$aes.Key = $cleBytes
$aes.GenerateIV()
$texteBytes = [System.Text.Encoding]::UTF8.GetBytes($texteAChiffrer)
$chiffreBytes = $aes.CreateEncryptor().TransformFinalBlock($texteBytes, 0, $texteBytes.Length)
$cryptedText = [Convert]::ToBase64String($chiffreBytes)
Write-Output "encrypted Text: $cryptedText"
在我的C#应用程序中,我必须解密这些文件. 我使用这个方法:
public static string UncryptAES(string cryptedText, byte[] key, byte[] initVector)
{
using (Aes aes算法 = Aes.Create())
{
aes算法.Key = key;
// how to compute the initVector instead of passing it as a parameter?
aes算法.IV = initVector;
ICryptoTransform decryptor = aes算法.CreateDecryptor(aes算法.Key, aes算法.IV);
using (var msDecrypt = new MemoryStream(Convert.FromBase64String(cryptedText)))
{
using (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (var srDecrypt = new StreamReader(csDecrypt))
{
return srDecrypt.ReadToEnd();
}
}
}
}
}
我了解到,初始向量在加密完成后由PowerShell以随机数的形式生成,并与加密数据一起存储. 如何计算初始向量?