源文件下载 md5.rar Code 1using System.Security.Cryptography; 2using System.IO; 3using System.Text; 4 5 6/**//* 7 * 本类功能: 8 * Md5加密 9 * 返回md5hash字符串10 * 返回兼容asp 的 md5的值11 * 16位为兼容asp加密类12 * 32位为.net正常加密类13 */14public partial class MD515{16 MD5#region MD517 /**//// <summary>18 /// 16位MD5加密方法,以前的DVBBS所使用19 /// </summary>20 /// <param name="strSource">待加密字串</param>21 /// <returns>加密后的字串</returns>22 public static string MD5Encrypt(string strSource)23 {24 return MD5Encrypt(strSource, 16);25 }26 /**//// <summary>27 /// MD5加密,和动网上的16/32位MD5加密结果相同28 /// </summary>29 /// <param name="strSource">待加密字串</param>30 /// <param name="length">16或32值之一,其它则采用.net默认MD5加密算法</param>31 /// <returns>加密后的字串</returns>32 public static string MD5Encrypt(string strSource, int length)33 {34 byte[] bytes = Encoding.ASCII.GetBytes(strSource);35 byte[] hashValue = ((System.Security.Cryptography.HashAlgorithm)System.Security.Cryptography.CryptoConfig.CreateFromName("MD5")).ComputeHash(bytes);36 StringBuilder sb = new StringBuilder();37 switch (length)38 {39 case 16:40 for (int i = 4; i < 12; i++)41 sb.Append(hashValue[i].ToString("x2"));42 break;43 case 32:44 for (int i = 0; i < 16; i++)45 {46 sb.Append(hashValue[i].ToString("x2"));47 }48 break;49 default:50 for (int i = 0; i < hashValue.Length; i++)51 {52 sb.Append(hashValue[i].ToString("x2"));53 }54 break;55 }56 return sb.ToString();57 }58 #endregion59}60 相关文章: