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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Security.Cryptography;
using System.IO;
namespace cheongsumware2021
{
public partial class Form1 : Form
{
string key = "cheongil";
string path = @"C:\격리소";
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{ // 암호화
run(key, DES.DesType.Encrypt);
}
private void button2_Click(object sender, EventArgs e)
{ //복호화
string decKey = textBox1.Text;
if (textBox1.Text == "") {
MessageBox.Show("복호화 키를 입력해주세요");
return;
}
if (textBox1.Text != key)
{
MessageBox.Show("복호화 키가 일치하지 않습니다.");
return;
}
run(decKey, DES.DesType.Decrypt);
}
void run(string key, DES.DesType type) {
if (Directory.Exists(path))
{
var des = new DES(key);
DirectoryInfo di = new DirectoryInfo(path);
foreach (var item in di.GetFiles())
{
Console.WriteLine(item.Name);
string path2 = path + @"\" + item.Name;
//FileInfo file = new FileInfo(path2);
//file.IsReadOnly = false;
StreamReader sr = new StreamReader(path2);
string text = sr.ReadToEnd();
sr.Close();
if (type == DES.DesType.Encrypt)
{
string newText = des.result(type, text);
using (StreamWriter sw = new StreamWriter(path2, false))
{
sw.Write(newText + "|" + Path.GetExtension(path2));
sw.Close();
}
string ext = Path.ChangeExtension(path2, ".cheongil");
File.Move(path2, ext);
}
else {
string[] texts = text.Split('|');
// texts[0] == "암호화된 원래내용"
//texts[1] == "확장자명"
string newText = des.result(type, texts[0]);
using (StreamWriter sw = new StreamWriter(path2, false))
{
sw.Write(newText);
sw.Close();
}
string ext = Path.ChangeExtension(path2, texts[1]);
File.Move(path2, ext);
}
//Console.WriteLine("-"+ newText);
}
}
else
{
MessageBox.Show("해당 폴더가 존재하지 않습니다.");
}
}
}
public class DES
{
public enum DesType
{
Encrypt = 0, // 암호화
Decrypt = 1 // 복호화
}
// Key 값은 무조건 8자리여야한다.
private byte[] Key { get; set; }
// 암호화/복호화 메서드
public string result(DesType type, string input)
{
var des = new DESCryptoServiceProvider()
{
Key = Key,
IV = Key
};
var ms = new MemoryStream();
// 익명 타입으로 transform / data 정의
var property = new
{
transform = type.Equals(DesType.Encrypt) ? des.CreateEncryptor() : des.CreateDecryptor(),
data = type.Equals(DesType.Encrypt) ? Encoding.UTF8.GetBytes(input.ToCharArray()) : Convert.FromBase64String(input)
};
var cryStream = new CryptoStream(ms, property.transform, CryptoStreamMode.Write);
var data = property.data;
cryStream.Write(data, 0, data.Length);
cryStream.FlushFinalBlock();
return type.Equals(DesType.Encrypt) ? Convert.ToBase64String(ms.ToArray()) : Encoding.UTF8.GetString(ms.GetBuffer());
}
// 생성자
public DES(string key)
{
Key = ASCIIEncoding.ASCII.GetBytes(key);
}
}
}
Colored by Color Scripter
|
cs |
파일리스트
61002595f3989_cheongsumware2021_프로젝트.zip
610025a801f45_cheongsumware2021_실행파일.zip