filecrypt.cs

c# DES文件加密 c# DES文件加密

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Security.Cryptography;

namespace DES
{
    public partial class filecrypt : Form
    {
        public filecrypt()
        {
            InitializeComponent();
        }

        private void openButton_Click(object sender, EventArgs e)
        {
           
            OpenFileDialog fileChooser = new OpenFileDialog();
            DialogResult result = fileChooser.ShowDialog();
  
            if (result == DialogResult.Cancel)
                return;
            openTextBox.Text = fileChooser.FileName;
        }

        private void saveButton_Click(object sender, EventArgs e)
        {
            SaveFileDialog fileChooser = new SaveFileDialog();
            DialogResult result = fileChooser.ShowDialog();

            fileChooser.CheckFileExists = false;
            if (result == DialogResult.Cancel)
                return;
           saveTextBox.Text= fileChooser.FileName;
 
        }

        private void EnButton_Click(object sender, EventArgs e)
        {
            if (openTextBox.Text == "" || saveTextBox.Text == "" || pwsTextBox.Text == "")
                return;
            Encrypt(openTextBox.Text, saveTextBox.Text, pwsTextBox.Text);
            openTextBox.Text = "";
            saveTextBox.Text = "";
            pwsTextBox.Text = "";
        }

        private void DeButton_Click(object sender, EventArgs e)
        {
            if (openTextBox.Text == "" || saveTextBox.Text == "" || pwsTextBox.Text == "")
                return;
            Decrypt(openTextBox.Text, saveTextBox.Text, pwsTextBox.Text);
            openTextBox.Text = "";
            saveTextBox.Text = "";
            pwsTextBox.Text = "";
        }


        public void Encrypt(string pathIn, string pathOut, string password)
        {
            try
            {
                byte[] iv = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
                byte[] key = System.Text.Encoding.UTF8.GetBytes(password);
                System.IO.FileStream fs = new FileStream(pathIn, FileMode.Open, FileAccess.Read);
                System.IO.FileStream outfs = new FileStream(pathOut, FileMode.OpenOrCreate, FileAccess.Write);
                outfs.SetLength(0);
                byte[] myBytes = new byte[100];
                long myInLength = 0;
                long myLength = fs.Length;
                System.Security.Cryptography.DESCryptoServiceProvider dsp = new DESCryptoServiceProvider();
                System.Security.Cryptography.CryptoStream cs = new CryptoStream(outfs, dsp.CreateEncryptor(key, iv), CryptoStreamMode.Write);
                while (myInLength < myLength)
                {
                    int myLen = fs.Read(myBytes, 0, 100);
                    cs.Write(myBytes, 0, myLen);
                    myInLength += myLen;
                }
                cs.Close();
                fs.Close();
                outfs.Close();
            }
            catch (IOException ioex)
            {
               // Log.debug("Encrypt(pathIn, pathOut, password): " + ioex.Message + "\r\nSource:" + ioex.Source + "\r\nStackTrace:" + ioex.StackTrace);
            }
        }

        public void Decrypt(string pathIn, string pathOut, string password)
        {
            try
            {
                System.IO.FileStream fs = new FileStream(pathIn, FileMode.Open, FileAccess.Read);
                System.IO.FileStream outfs = new FileStream(pathOut, FileMode.OpenOrCreate, FileAccess.Write);
                outfs.SetLength(0);
                long myLength = fs.Length;
                long myInLength = 0;
                byte[] iv = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
                byte[] key = System.Text.Encoding.UTF8.GetBytes(password);
                System.Security.Cryptography.DESCryptoServiceProvider dsp = new DESCryptoServiceProvider();
                System.Security.Cryptography.CryptoStream cs = new CryptoStream(outfs, dsp.CreateDecryptor(key, iv), CryptoStreamMode.Write);
                byte[] myBytes = new byte[100];
                while (myInLength < myLength)
                {
                    int myLen = fs.Read(myBytes, 0, 100);
                    cs.Write(myBytes, 0, myLen);
                    myInLength += myLen;
                }
                cs.Close();
                fs.Close();
                outfs.Close();
            }
            catch (IOException ioex)
            {
              //  Log.debug("Dncrypt(pathIn, pathOut, password): " + ioex.Message + "\r\nSource:" + ioex.Source + "\r\nStackTrace:" + ioex.StackTrace);
            }
        }

   





    }
}