常用的加密解密帮助类

经常用的加密解密方法

加密方式

+ View Code?

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private string Encrypt(string clearText)     {         string EncryptionKey = "KEY"; // See NOTE at end of TIP byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);         using (Aes encryptor = Aes.Create())         {             Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[]             { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });             encryptor.Key = pdb.GetBytes(32);             encryptor.IV = pdb.GetBytes(16);             using (MemoryStream ms = new MemoryStream())             {                 using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))                 {                     cs.Write(clearBytes, 0, clearBytes.Length);                     cs.Close();                 }                 clearText = Convert.ToBase64String(ms.ToArray());             }         }         return clearText;     }

　　解密方法

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private string Decrypt(string cipherText)     {         string EncryptionKey = "KEY"; //See Note at the End of TIP         cipherText = cipherText.Replace(" ", "+");         byte[] cipherBytes = Convert.FromBase64String(cipherText);         using (Aes encryptor = Aes.Create())         {             Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[]             { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });             encryptor.Key = pdb.GetBytes(32);             encryptor.IV = pdb.GetBytes(16);             using (MemoryStream ms = new MemoryStream())             {                 using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))                 {                     cs.Write(cipherBytes, 0, cipherBytes.Length);                     cs.Close();                 }                 cipherText = Encoding.Unicode.GetString(ms.ToArray());             }         }         return cipherText;     }