这篇文章主要介绍了asp.net中des加密与解密md5加密帮助类的实例代码，非常不错，具有参考借鉴价值,需要的朋友可以参考下
public class trialhelper
{ //默认密钥向量
private static byte[] keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef };
/// <summary>
/// des加密字符串
/// </summary>
/// <param name="encryptstring">待加密的字符串</param>
/// <param name="encryptkey">加密密钥,要求为8位</param>
/// <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
{
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;
}
}
/// <summary>
/// des解密字符串
/// </summary>
/// <param name="decryptstring">待解密的字符串</param>
/// <param name="decryptkey">解密密钥,要求为8位,和加密密钥相同</param>
/// <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
{
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;
}
}
/// <summary>
/// md5数据加密
/// </summary>
/// <param name="sdatain">加密字段</param>
/// <returns>加密后的字符串</returns>
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
以上就是在asp.net中实现des加密与解密md5加密功能介绍的详细内容。