string Encrypt(string src)
{
byte[] b = System.Text.Encoding.Default.GetBytes(src);
int i;
for (i = 0 ; i < b.GetLength(0); ++i)
{
b[i] += 3;
}
return System.Text.Encoding.Default.GetString(b);
}
{
byte[] b = System.Text.Encoding.Default.GetBytes(src);
int i;
for (i = 0 ; i < b.GetLength(0); ++i)
{
b[i] += 3;
}
return System.Text.Encoding.Default.GetString(b);
}
{
byte[] b = System.Text.Encoding.Default.GetBytes(src);
int i;
for (i = 0 ; i < b.GetLength(0); ++i)
{
b[i] += 3;
if (b[i] > 122)
b[i] -= 26;
}
return System.Text.Encoding.Default.GetString(b);
}
using System;
using System.Text;
using System.Globalization;
using System.Security.Cryptography;
using System.Windows.Forms;namespace Jh.Base.Encrypts
{
public class JhEncrypt
{
public JhEncrypt()
{
}
public static string Encrypt(string original)
{
return Encrypt(original,"JASONHEUNG");
}
public static string Decrypt(string original)
{
return Decrypt(original,"JASONHEUNG",System.Text.Encoding.Default);
}
public static string Decrypt(string original, string key)
{
return Decrypt(original,key,System.Text.Encoding.Default);
}
public static string Decrypt(string original,Encoding encoding)
{
return Decrypt(original,"JASONHEUNG",encoding);
}
/// <summary>
/// 加密
/// </summary>
/// <param name="original">原始文字</param>
/// <param name="key">密钥</param>
/// <param name="encoding">字符编码方案</param>
/// <returns>密文</returns>
public static string Encrypt(string original, string key)
{
byte[] buff = System.Text.Encoding.Default.GetBytes(original);
byte[] kb = System.Text.Encoding.Default.GetBytes(key);
return Convert.ToBase64String(Encrypt(buff,kb));
}
/// <summary>
/// 解密
/// </summary>
/// <param name="encrypted">密文</param>
/// <param name="key">密钥</param>
/// <param name="encoding">字符编码方案</param>
/// <returns>明文</returns>
public static string Decrypt(string encrypted, string key,Encoding encoding)
{
byte[] buff = Convert.FromBase64String(encrypted);
byte[] kb = System.Text.Encoding.Default.GetBytes(key);
return encoding.GetString(Decrypt(buff,kb));
} public static byte[] MakeMD5(byte[] original)
{
MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
byte[] keyhash = hashmd5.ComputeHash(original);
hashmd5 = null;
return keyhash;
} /// <summary>
/// 加密
/// </summary>
/// <param name="original">原始数据</param>
/// <param name="key">密钥</param>
/// <returns></returns>
public static byte[] Encrypt(byte[] original, byte[] key)
{
TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
des.Key = MakeMD5(key);
des.Mode = CipherMode.ECB;
return des.CreateEncryptor().TransformFinalBlock(original, 0, original.Length);
} /// <summary>
/// 解密数据
/// </summary>
/// <param name="encrypted">密文</param>
/// <param name="key">密钥</param>
/// <returns></returns>
public static byte[] Decrypt(byte[] encrypted, byte[] key)
{
TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
des.Key = MakeMD5(key);
des.Mode = CipherMode.ECB; return des.CreateDecryptor().TransformFinalBlock(encrypted, 0, encrypted.Length);
}
/// <summary>
/// 加密
/// </summary>
/// <param name="original">原始数据</param>
/// <param name="key">密钥</param>
/// <returns></returns>
public static byte[] Encrypt(byte[] original)
{
byte[] key = System.Text.Encoding.Default.GetBytes("JASONHEUNG");
return Encrypt(original,key);
} /// <summary>
/// 解密数据
/// </summary>
/// <param name="encrypted">密文</param>
/// <param name="key">密钥</param>
/// <returns></returns>
public static byte[] Decrypt(byte[] encrypted)
{
byte[] key = System.Text.Encoding.Default.GetBytes("JASONHEUNG");
return Decrypt(encrypted,key);
}
}
}