C#的DES加密示例
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Security.Cryptography;//加密部分
using System.IO;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
private static string keyUse = "12345678";
private static string keyDe = "12345678";
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串
/// <param name="encryptKey">加密密钥,要求为8位
/// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
public static string EncryptDES(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte[] rgbIV = Keys;
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同
/// <returns>解密成功返回解密后的字符串,失败返源串</returns>
public static string DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}
private void button1_Click(object sender, EventArgs e)
{
string strOrg = TB_ORG.Text;
string tmp = System.Text.Encoding.Default.GetString(Keys);//[].ToString();//BitConverter.ToString(Keys).Replace("-", string.Empty);// Keys.ToString();
string strEp = EncryptDES(strOrg, keyUse);
TB_EP.Text = strEp;
}
private void button2_Click(object sender, EventArgs e)
{
string strEp = TB_EP.Text;
string tmp = System.Text.Encoding.Default.GetString(Keys);//BitConverter.ToString(Keys).Replace("-", string.Empty);// Keys.ToString();
string strDe = DecryptDES(strEp, keyDe);
TB_DE.Text = strDe;
}
}
}
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Security.Cryptography;//加密部分
using System.IO;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
private static string keyUse = "12345678";
private static string keyDe = "12345678";
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串
/// <param name="encryptKey">加密密钥,要求为8位
/// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
public static string EncryptDES(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte[] rgbIV = Keys;
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同
/// <returns>解密成功返回解密后的字符串,失败返源串</returns>
public static string DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}
private void button1_Click(object sender, EventArgs e)
{
string strOrg = TB_ORG.Text;
string tmp = System.Text.Encoding.Default.GetString(Keys);//[].ToString();//BitConverter.ToString(Keys).Replace("-", string.Empty);// Keys.ToString();
string strEp = EncryptDES(strOrg, keyUse);
TB_EP.Text = strEp;
}
private void button2_Click(object sender, EventArgs e)
{
string strEp = TB_EP.Text;
string tmp = System.Text.Encoding.Default.GetString(Keys);//BitConverter.ToString(Keys).Replace("-", string.Empty);// Keys.ToString();
string strDe = DecryptDES(strEp, keyDe);
TB_DE.Text = strDe;
}
}
}
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