使用ProcessStartInfo从C#到PowerShell的SecureString密码

using System;
using System.Diagnostics;
using System.Security;
using System.Text;

class Program
{
    static void Main()
    {
        SecureString password = new SecureString();
        // 添加密码字符到SecureString
        password.AppendChar('P');
        password.AppendChar('a');
        password.AppendChar('s');
        password.AppendChar('s');
        password.AppendChar('w');
        password.AppendChar('o');
        password.AppendChar('r');
        password.AppendChar('d');

        ProcessStartInfo psi = new ProcessStartInfo();
        psi.FileName = "powershell.exe";
        psi.UseShellExecute = false;
        psi.RedirectStandardInput = true;

        Process process = new Process();
        process.StartInfo = psi;
        process.Start();

        // 将SecureString密码转换为字节数组
        byte[] passwordBytes = Encoding.Unicode.GetBytes(ConvertToUnsecureString(password));

        // 将密码字节数组写入标准输入流
        process.StandardInput.BaseStream.Write(passwordBytes, 0, passwordBytes.Length);
        process.StandardInput.WriteLine();

        // 执行PowerShell脚本
        process.StandardInput.WriteLine("Write-Host 'Password received!'");

        process.WaitForExit();
        process.Close();
    }

    // 将SecureString转换为普通字符串
    private static string ConvertToUnsecureString(SecureString secureString)
    {
        IntPtr unmanagedString = IntPtr.Zero;
        try
        {
            unmanagedString = System.Runtime.InteropServices.Marshal.SecureStringToGlobalAllocUnicode(secureString);
            return System.Runtime.InteropServices.Marshal.PtrToStringUni(unmanagedString);
        }
        finally
        {
            System.Runtime.InteropServices.Marshal.ZeroFreeGlobalAllocUnicode(unmanagedString);
        }
    }
}