问我能用RC4/AES 128位破解Adobe密码加密吗？

EN

using System.IO;
using iTextSharp.text.pdf;

namespace PdfDecryptorCore
{
    public class PasswordDecryptor
    {
        public string ReadPassword { set; get; }        
        public string PdfPath { set; get; }
        public string OutputPdf { set; get; }

        public void DecryptPdf()
        {
            PdfReader.unethicalreading = true;

            PdfReader reader;
            if(string.IsNullOrWhiteSpace(ReadPassword))
             reader = new PdfReader(PdfPath);
            else
                reader = new PdfReader(PdfPath, System.Text.Encoding.UTF8.GetBytes(ReadPassword));

            using (var stamper = new PdfStamper(reader, new FileStream(OutputPdf, FileMode.Create)))
            {
                stamper.Close();
            }
        }
    }
}