本文实例讲述了asp.net实现的MD5加密和DES加解密算法类。分享给大家供大家参考,具体如下:
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#region MD5算法 public string md5( string str, int code) { if (code == 32) //32位加密 { return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5" ).ToLower(); } else //16位MD5加密(取32位加密的9~25字符) { return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5" ).ToLower().Substring(8, 16); } } #endregion |
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#region DESEncrypt DES加密 // <summary> /// 进行DES加密。 /// </summary> /// <param name=”pToEncrypt”>要加密的字符串。</param> /// <param name=”sKey”>密钥,且必须为8位。</param> /// <returns>以Base64格式返回的加密字符串。</returns> public string DESEncrypt( string pToEncrypt, string sKey) { using (DESCryptoServiceProvider des = new DESCryptoServiceProvider()) { byte [] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt); des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); System.IO.MemoryStream ms = new System.IO.MemoryStream(); using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write)) { cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); cs.Close(); } string str = Convert.ToBase64String(ms.ToArray()); ms.Close(); return str; } } #endregion |
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#region DESDecrypt DES解密 /// <summary> /// 进行DES解密。 /// </summary> /// <param name=”pToDecrypt”>要解密的以Base64</param> /// <param name=”sKey”>密钥,且必须为8位。</param> /// <returns>已解密的字符串。</returns> public string DESDecrypt( string pToDecrypt, string sKey) { byte [] inputByteArray = Convert.FromBase64String(pToDecrypt); using (DESCryptoServiceProvider des = new DESCryptoServiceProvider()) { des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); System.IO.MemoryStream ms = new System.IO.MemoryStream(); using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write)) { cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); cs.Close(); } string str = Encoding.UTF8.GetString(ms.ToArray()); ms.Close(); return str; } } #endregion |
希望本文所述对大家asp.net程序设计有所帮助。