1 #region ===========================DES算法=================================== 2 3 private static string key = "key"; 4 /// <summary> 5 /// 默认加密方法 6 /// </summary> 7 /// <param name="text"></param> 8 /// <returns></returns> 9 public static string DESEncrypt(string text) 10 { 11 return DESEncrypt(text, key); 12 } 13 /// <summary> 14 /// DES加密方法 15 /// </summary> 16 /// <param name="text">明文</param> 17 /// <param name="sKey">密钥</param> 18 /// <returns>加密后的密文</returns> 19 public static string DESEncrypt(string text,string sKey) 20 { 21 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 22 byte[] inputByteArray; 23 inputByteArray = Encoding.Default.GetBytes(text); 24 des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 25 des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 26 System.IO.MemoryStream ms = new System.IO.MemoryStream(); 27 CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); 28 cs.Write(inputByteArray, 0, inputByteArray.Length); 29 cs.FlushFinalBlock(); 30 StringBuilder ret = new StringBuilder(); 31 foreach (byte b in ms.ToArray()) 32 { 33 ret.AppendFormat("{0:X2}", b); 34 } 35 ms.Dispose(); 36 cs.Dispose(); 37 return ret.ToString(); 38 39 } 40 /// <summary> 41 /// DES解密方法，默认方法 42 /// </summary> 43 /// <param name="text">待加密明文</param> 44 /// <returns>加密后的密文</returns> 45 public static string DESDecrypt(string text) 46 { 47 return DESDecrypt(text,key); 48 } 49 /// <summary> 50 /// DES解密方法 51 /// </summary> 52 /// <param name="text">密文</param> 53 /// <param name="sKey">密钥</param> 54 /// <returns>解密后的明文</returns> 55 public static string DESDecrypt(string text,string sKey) 56 { 57 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 58 int len; 59 len = text.Length / 2; 60 byte[] inputByteArray = new byte[len]; 61 int x, i; 62 for (x = 0; x < len; x++) 63 { 64 i = Convert.ToInt32(text.Substring(x * 2, 2), 16); 65 inputByteArray[x] = (byte)i; 66 } 67 try 68 { 69 des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 70 des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 71 System.IO.MemoryStream ms = new System.IO.MemoryStream(); 72 CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); 73 cs.Write(inputByteArray, 0, inputByteArray.Length); 74 cs.FlushFinalBlock(); 75 string estring = Encoding.Default.GetString(ms.ToArray()); 76 ms.Dispose(); 77 cs.Dispose(); 78 return estring; 79 } 80 catch 81 { 82 return ""; 83 } 84 85 } 86 #endregion 87 88 #region ==============================MD5算法================================== 89 /// <summary> 90 /// 使用MD5算法求Hash散列 91 /// </summary> 92 /// <param name="text">明文</param> 93 /// <returns>散列值</returns> 94 public static string MD5Encrypt(string text) 95 { 96 return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(text, "MD5"); 97 } 98 #endregion============================================================ 99 100 101 #region =============================SHA1============================== 102 103 /// <summary> 104 /// 使用SHA1算法求Hash散列 105 /// </summary> 106 /// <param name="text">明文</param> 107 /// <returns>散列值</returns> 108 public static string SHA1Encrypt(string text) 109 { 110 return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(text, "SHA1"); 111 } 112 #endregion============================================================= 113 114 115 116 }
