1 //旧方法的写法 2 #region ========加密======== 3 /// <summary> 4 /// 加密 5 /// </summary> 6 /// <param name="Text"></param> 7 /// <returns></returns> 8 public static string Encrypt(string Text) 9 { 10 return Encrypt(Text, DESKey); 11 } 12 /// <summary> 13 /// 加密数据 14 /// </summary> 15 /// <param name="Text"></param> 16 /// <param name="sKey"></param> 17 /// <returns></returns> 18 public static string Encrypt(string Text, string sKey) 19 { 20 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 21 byte[] inputByteArray; 22 inputByteArray = Encoding.Default.GetBytes(Text); 23 des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 24 des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 25 System.IO.MemoryStream ms = new System.IO.MemoryStream(); 26 CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); 27 cs.Write(inputByteArray, 0, inputByteArray.Length); 28 cs.FlushFinalBlock(); 29 StringBuilder ret = new StringBuilder(); 30 foreach (byte b in ms.ToArray()) 31 { 32 ret.AppendFormat("{0:X2}", b); 33 } 34 return ret.ToString(); 35 } 36 37 #endregion 38 39 #region ========解密======== 40 /// <summary> 41 /// 解密 42 /// </summary> 43 /// <param name="Text"></param> 44 /// <returns></returns> 45 public static string Decrypt(string Text) 46 { 47 if (!string.IsNullOrEmpty(Text)) 48 { 49 return Decrypt(Text, DESKey); 50 } 51 else 52 { 53 return ""; 54 } 55 } 56 /// <summary> 57 /// 解密数据 58 /// </summary> 59 /// <param name="Text"></param> 60 /// <param name="sKey"></param> 61 /// <returns></returns> 62 public static string Decrypt(string Text, string sKey) 63 { 64 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 65 int len; 66 len = Text.Length / 2; 67 byte[] inputByteArray = new byte[len]; 68 int x, i; 69 for (x = 0; x < len; x++) 70 { 71 i = Convert.ToInt32(Text.Substring(x * 2, 2), 16); 72 inputByteArray[x] = (byte)i; 73 } 74 des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 75 des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 76 System.IO.MemoryStream ms = new System.IO.MemoryStream(); 77 CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); 78 cs.Write(inputByteArray, 0, inputByteArray.Length); 79 cs.FlushFinalBlock(); 80 return Encoding.Default.GetString(ms.ToArray()); 81 } 82 83 #endregion
1 //新的写法 2 3 #region ========加密======== 4 5 /// <summary> 6 /// 加密 7 /// </summary> 8 /// <param name="Text"></param> 9 /// <returns></returns> 10 public static string Encrypt(string Text) 11 { 12 if (Text.Trim() == "") 13 return ""; 14 else 15 return Encrypt(Text, "passkey"); 16 } 17 /// <summary> 18 /// 加密数据 19 /// </summary> 20 /// <param name="Text"></param> 21 /// <param name="sKey"></param> 22 /// <returns></returns> 23 public static string Encrypt(string Text, string sKey) 24 { 25 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 26 byte[] inputByteArray; 27 inputByteArray = Encoding.Default.GetBytes(Text); 28 des.Key = ASCIIEncoding.ASCII.GetBytes(MD5(sKey).Substring(0, 8)); 29 des.IV = ASCIIEncoding.ASCII.GetBytes(MD5(sKey).Substring(0, 8)); 30 System.IO.MemoryStream ms = new System.IO.MemoryStream(); 31 CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); 32 cs.Write(inputByteArray, 0, inputByteArray.Length); 33 cs.FlushFinalBlock(); 34 StringBuilder ret = new StringBuilder(); 35 foreach (byte b in ms.ToArray()) 36 { 37 ret.AppendFormat("{0:X2}", b); 38 } 39 return ret.ToString(); 40 } 41 42 #endregion 43 44 #region ========解密======== 45 46 47 /// <summary> 48 /// 解密 49 /// </summary> 50 /// <param name="Text"></param> 51 /// <returns></returns> 52 public static string Decrypt(string Text) 53 { 54 if (Text.Trim() == "") 55 return ""; 56 else 57 return Decrypt(Text, "passkey"); 58 } 59 /// <summary> 60 /// 解密数据 61 /// </summary> 62 /// <param name="Text"></param> 63 /// <param name="sKey"></param> 64 /// <returns></returns> 65 public static string Decrypt(string Text, string sKey) 66 { 67 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 68 int len; 69 len = Text.Length / 2; 70 byte[] inputByteArray = new byte[len]; 71 int x, i; 72 for (x = 0; x < len; x++) 73 { 74 i = Convert.ToInt32(Text.Substring(x * 2, 2), 16); 75 inputByteArray[x] = (byte)i; 76 } 77 des.Key = ASCIIEncoding.ASCII.GetBytes(MD5(sKey).Substring(0, 8)); 78 des.IV = ASCIIEncoding.ASCII.GetBytes(MD5(sKey).Substring(0, 8)); 79 System.IO.MemoryStream ms = new System.IO.MemoryStream(); 80 CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); 81 cs.Write(inputByteArray, 0, inputByteArray.Length); 82 cs.FlushFinalBlock(); 83 return Encoding.Default.GetString(ms.ToArray()); 84 } 85 86 public static string MD5(string str) 87 { 88 //微软md5方法参考return FormsAuthentication.HashPasswordForStoringInConfigFile(str, "md5"); 89 byte[] b = Encoding.Default.GetBytes(str); 90 b = new MD5CryptoServiceProvider().ComputeHash(b); 91 string ret = ""; 92 for (int i = 0; i < b.Length; i++) 93 ret += b[i].ToString("X").PadLeft(2, '0'); 94 return ret; 95 } 96 97 #endregion