这篇文章主要介绍了ASP.NET中DES加密与解密MD5的示例分析，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
public class TrialHelper
{ //默认密钥向量
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
///
/// DES加密字符串
///
/// 待加密的字符串
/// 加密密钥,要求为8位
/// 加密成功返回加密后的字符串，失败返回源串
public static string EncryptDES( string encryptString, string encryptKey = "" )
{
try
{
if (string.IsNullOrEmpty(encryptKey) || encryptKey.Length < 8)
{
encryptKey = "winform01";
}
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;
}
}
///
/// DES解密字符串
///
/// 待解密的字符串
/// 解密密钥,要求为8位,和加密密钥相同
/// 解密成功返回解密后的字符串，失败返源串
public static string DecryptDES( string decryptString, string decryptKey = "" )
{
try
{
if (string.IsNullOrEmpty(decryptKey) || decryptKey.Length < 8)
{
decryptKey = "winform01";
}
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
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;
}
}
///
/// MD5数据加密
///
/// 加密字段
/// 加密后的字符串
public static string GetMD5( string sDataIn )
{
System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] bytValue, bytHash;
bytValue = System.Text.Encoding.UTF8.GetBytes(sDataIn);
bytHash = md5.ComputeHash(bytValue);
md5.Clear();
string sTemp = "";
for (int i = 0; i < bytHash.Length; i++)
{
sTemp += bytHash[i].ToString("x").PadLeft(2, '0');
}
return sTemp;
}
} 调用：
//获取登录信息 loginRecord.Name = tbName.Text.Trim(); loginRecord.MD5Pwd = TrialHelper.GetMD5(tbPwd.Password); //保存到数据库MD5加密方式 loginRecord.Pwd = TrialHelper.EncryptDES(tbPwd.Password);//记住密码des加密方式，保存到本地
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