常用加密解密类(含3des)
using System;
using System.Text;
using System.Globalization;
using System.Security.Cryptography;
using CAPICOM;
using System.Runtime.InteropServices;
using System.IO;
using System.Web.Security;
namespace Dongle
{
/// <summary>
/// Encoder 的摘要说明。
/// </summary>
public class Encoder
{
private static string m_defaultKey = "~!@#$%^1*()_+|[ SDGOW.CN ]|+_)(*1^%$#@!~";
/// <summary>
/// 3DES解密，使用缺省密钥
/// </summary>
/// <param name="original">明文</param>
/// <returns>密文</returns>
public static string CapicomEncrypt(string original)
{
return CapicomEncrypt(original, m_defaultKey);
}
/// <summary>
/// 3DES解密，使用缺省密钥
/// </summary>
/// <param name="original">密文</param>
/// <returns>明文</returns>
public static string CapicomDecrypt(string original)
{
try
{
return CapicomDecrypt(original, m_defaultKey);
}
catch
{
return "";
}
}
/// <summary>
/// 3DES加密，使用给定密钥
/// </summary>
/// <param name="original"></param>
/// <param name="key">密钥</param>
/// <returns></returns>
public static string CapicomEncrypt(string original, string key)
{
CAPICOM.EncryptedData ed = new EncryptedData();
ed.Content = original;
ed.Algorithm.Name = CAPICOM_ENCRYPTION_ALGORITHM.CAPICOM_ENCRYPTION_ALGORITHM_3DES;
ed.Algorithm.KeyLength = CAPICOM_ENCRYPTION_KEY_LENGTH.CAPICOM_ENCRYPTION_KEY_LENGTH_128_BITS;
ed.SetSecret(key, CAPICOM_SECRET_TYPE.CAPICOM_SECRET_PASSWORD);
return ed.Encrypt(CAPICOM_ENCODING_TYPE.CAPICOM_ENCODE_BASE64);
}
/// <summary>
/// 3DES解密，使用给定密钥
/// </summary>
/// <param name="encrypted"></param>
/// <param name="key">密钥</param>
/// <returns></returns>
public static string CapicomDecrypt(string encrypted, string key)
{
CAPICOM.EncryptedData ed = new EncryptedData();
ed.Algorithm.Name = CAPICOM_ENCRYPTION_ALGORITHM.CAPICOM_ENCRYPTION_ALGORITHM_3DES;
ed.Algorithm.KeyLength = CAPICOM_ENCRYPTION_KEY_LENGTH.CAPICOM_ENCRYPTION_KEY_LENGTH_128_BITS;
ed.SetSecret(key, CAPICOM_SECRET_TYPE.CAPICOM_SECRET_PASSWORD);
ed.Decrypt(encrypted);
return ed.Content;
}
/// <summary>
/// DES加密，使用缺省密钥
/// </summary>
/// <param name="original">明文</param>
/// <returns>密文</returns>
public static string Encrypt(string original)
{
return Encrypt(original, m_defaultKey);
}
/// <summary>
/// DES解密，使用缺省密钥
/// </summary>
/// <param name="encrypted">密文</param>
/// <returns>明文</returns>
public static string Decrypt(string encrypted)
{
try
{
return Decrypt(encrypted, m_defaultKey, System.Text.Encoding.Default);
}
catch
{
return "";
}
}
/// <summary>
/// DES解密，使用给定密钥
/// </summary>
/// <param name="encrypted">密文</param>
/// <param name="key">密钥</param>
/// <returns>明文</returns>
public static string Decrypt(string encrypted, string key)
{
return Decrypt(encrypted, key, System.Text.Encoding.Default);
}
/// <summary>
/// 使用缺省密钥解密,返回指定编码方式明文
/// </summary>
/// <param name="encrypted">密文</param>
/// <param name="encoding">编码方式</param>
/// <returns>明文</returns>
public static string Decrypt(string encrypted, Encoding encoding)
{
return Decrypt(encrypted, m_defaultKey, encoding);
}
/// <summary>
/// DES加密，使用给定密钥
/// </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>
/// DES解密，使用给定密钥
/// </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));
}
/// <summary>
/// 生成MD5摘要
/// </summary>
/// <param name="original">数据源</param>
/// <returns>摘要</returns>
public static byte[] MakeMD5(byte[] original)
{
MD5CryptoServiceProvider hashmd = new MD5CryptoServiceProvider();
byte[] keyhash = hashmd.ComputeHash(original);
hashmd = null;
return keyhash;
}
/// <summary>
/// 使用给定密钥加密
/// </summary>
/// <param name="original">明文</param>
/// <param name="key">密钥</param>
/// <returns>密文</returns>
public static byte[] Encrypt(byte[] original, byte[] key)
{
TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
//RC2CryptoServiceProvider des = new RC2CryptoServiceProvider();
des.Key = MakeMD5(key);
des.Mode = CipherMode.ECB;
return des.CreateEncryptor().TransformFinalBlock(original, 0, original.Length);
}
/// <summary>
/// 使用给定密钥解密数据
/// </summary>
/// <param name="encrypted">密文</param>
/// <param name="key">密钥</param>
/// <returns>明文</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>
/// 使用给定密钥加密
/// </summary>
/// <param name="original">原始数据</param>
/// <param name="key">密钥</param>
/// <returns>密文</returns>
public static byte[] Encrypt(byte[] original)
{
byte[] key = System.Text.Encoding.Default.GetBytes(m_defaultKey);
return Encrypt(original, key);
}
/// <summary>
/// 使用缺省密钥解密数据
/// </summary>
/// <param name="encrypted">密文</param>
/// <param name="key">密钥</param>
/// <returns>明文</returns>
public static byte[] Decrypt(byte[] encrypted)
{
byte[] key = System.Text.Encoding.Default.GetBytes(m_defaultKey);
return Decrypt(encrypted, key);
}
/**/
/// <summary>
/// MD5 16位加密 加密后密码为大写
/// </summary>
/// <param name="ConvertString"></param>
/// <returns></returns>
public static string StrToMD5_16(string ConvertString)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);
t2 = t2.Replace("-", "");
return t2;
}
/// <summary>
/// MD5 32位加密 加密后密码为小写
/// </summary>
/// <param name="inStr"></param>
/// <returns></returns>
public static string StrToMD5_32(string inStr)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] InBytes = Encoding.GetEncoding("GB2312").GetBytes(inStr);
byte[] OutBytes = md5.ComputeHash(InBytes);
string OutString = "";
for (int i = 0; i < OutBytes.Length; i++)
{
OutString += OutBytes[i].ToString("x2");
}
return OutString;
}
/// <summary>
/// 储存密码时的字符串MD5/SHA1加密
/// </summary>
/// <param name="PasswordString"></param>
/// <param name="PasswordFormat">“SHA1”或“MD5”</param>
/// <returns></returns>
public static string EncryptPassword(string PasswordString, string PasswordFormat)
{
string EncryptPassword = "";
if (PasswordFormat == "SHA1")
{
EncryptPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "SHA1");
}
else if (PasswordFormat == "MD5")
{
EncryptPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "MD5");
}
else
{
EncryptPassword = PasswordString;//未加密
}
return EncryptPassword;
}
}
}
