加密解密算法,太經常使用了,但是實在忍受不了十次八次以後仍是要重頭寫,老是能告訴我原來的算法很差用(實際是壓根不會用)的狀況,不如直接寫出來,再有人要直接給他看看,也順便記錄下算法,方便下新手大衆。css
DES算法:這算是你們很是經常使用的對稱算法了,不少人都在用這個。算法
private static string DesKey = @"P@+#wG+Z"; /// <summary> /// DES加密字符串 /// </summary> /// <param name="encryptString">待加密的字符串</param> /// <param name="encryptKey">加密密鑰,要求爲8位</param> /// <returns>加密成功返回加密後的字符串,失敗返回源串</returns> public static string EncryptDES(string encryptString, string encryptKey) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); byte[] rgbIV = Keys; byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Convert.ToBase64String(mStream.ToArray()); } catch { return encryptString; } } /// <summary> /// DES解密字符串 /// </summary> /// <param name="decryptString">待解密的字符串</param> /// <param name="decryptKey">解密密鑰,要求爲8位,和加密密鑰相同</param> /// <returns>解密成功返回解密後的字符串,失敗返源串</returns> public static string DecryptDES(string decryptString, string decryptKey) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey); byte[] rgbIV = Keys; byte[] inputByteArray = Convert.FromBase64String(decryptString); DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Encoding.UTF8.GetString(mStream.ToArray()); } catch { return decryptString; } }
DesKey 就是祕鑰,這個看本身喜歡了,鄙人也曾經用過「wlyzdhp」之類的祕鑰。
AES算法:也是經常使用的對稱算法,安全係數比DES好一點。我的很推薦使用。安全
private static string AesKey = @")O[NB]6,YF}+efcaj{+oESb9d8>Z'e9M"; /// <summary> /// AES 加密(高級加密標準,是下一代的加密算法標準,速度快,安全級別高,目前 AES 標準的一個實現是 Rijndael 算法) /// </summary> /// <param name="EncryptString">待加密密文</param> /// <param name="EncryptKey">加密密鑰</param> /// <returns></returns> public static string AESEncrypt(string EncryptString, string EncryptKey) { if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得爲空")); } if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密鑰不得爲空")); } string m_strEncrypt = ""; byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ=="); Rijndael m_AESProvider = Rijndael.Create(); try { byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write); m_csstream.Write(m_btEncryptString, 0, m_btEncryptString.Length); m_csstream.FlushFinalBlock(); m_strEncrypt = Convert.ToBase64String(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_csstream.Close(); m_csstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_AESProvider.Clear(); } return m_strEncrypt; } /// <summary> /// AES 解密(高級加密標準,是下一代的加密算法標準,速度快,安全級別高,目前 AES 標準的一個實現是 Rijndael 算法) /// </summary> /// <param name="DecryptString">待解密密文</param> /// <param name="DecryptKey">解密密鑰</param> /// <returns></returns> public static string AESDecrypt(string DecryptString, string DecryptKey) { if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得爲空")); } if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密鑰不得爲空")); } string m_strDecrypt = ""; byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ=="); Rijndael m_AESProvider = Rijndael.Create(); try { byte[] m_btDecryptString = Convert.FromBase64String(DecryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write); m_csstream.Write(m_btDecryptString, 0, m_btDecryptString.Length); m_csstream.FlushFinalBlock(); m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_csstream.Close(); m_csstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_AESProvider.Clear(); } return m_strDecrypt; }
同上,不解釋了。ide
RSA算法:RSA算法是用一套公鑰祕鑰進行加密解密的,從安全機制上來講比上面兩種好,不過這種算法是基於兩個大質數乘積互質原則來進行加密解密的,效率上跟公鑰祕鑰的大小有關,看官們能夠根據狀況適用,這裏只給出了一套我如今經常使用的一套公鑰祕鑰,公鑰祕鑰網上有相關的生成軟件,各位能夠自行下載使用。ui
/// <summary> /// RSA加密 /// </summary> /// <param name="publickey"></param> /// <param name="content"></param> /// <returns></returns> public static string RSAEncrypt(string publickey, string content) { publickey = @"<RSAKeyValue><Modulus>5m9m14XH3oqLJ8bNGw9e4rGpXpcktv9MSkHSVFVMjHbfv+SJ5v0ubqQxa5YjLN4vc49z7SVju8s0X4gZ6AzZTn06jzWOgyPRV54Q4I0DCYadWW4Ze3e+BOtwgVU1Og3qHKn8vygoj40J6U85Z/PTJu3hN1m75Zr195ju7g9v4Hk=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>"; RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); byte[] cipherbytes; rsa.FromXmlString(publickey); cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content), false); return Convert.ToBase64String(cipherbytes); } /// <summary> /// RSA解密 /// </summary> /// <param name="privatekey"></param> /// <param name="content"></param> /// <returns></returns> public static string RSADecrypt(string privatekey, string content) { privatekey = @"<RSAKeyValue><Modulus>5m9m14XH3oqLJ8bNGw9e4rGpXpcktv9MSkHSVFVMjHbfv+SJ5v0ubqQxa5YjLN4vc49z7SVju8s0X4gZ6AzZTn06jzWOgyPRV54Q4I0DCYadWW4Ze3e+BOtwgVU1Og3qHKn8vygoj40J6U85Z/PTJu3hN1m75Zr195ju7g9v4Hk=</Modulus><Exponent>AQAB</Exponent><P>/hf2dnK7rNfl3lbqghWcpFdu778hUpIEBixCDL5WiBtpkZdpSw90aERmHJYaW2RGvGRi6zSftLh00KHsPcNUMw==</P><Q>6Cn/jOLrPapDTEp1Fkq+uz++1Do0eeX7HYqi9rY29CqShzCeI7LEYOoSwYuAJ3xA/DuCdQENPSoJ9KFbO4Wsow==</Q><DP>ga1rHIJro8e/yhxjrKYo/nqc5ICQGhrpMNlPkD9n3CjZVPOISkWF7FzUHEzDANeJfkZhcZa21z24aG3rKo5Qnw==</DP><DQ>MNGsCB8rYlMsRZ2ek2pyQwO7h/sZT8y5ilO9wu08Dwnot/7UMiOEQfDWstY3w5XQQHnvC9WFyCfP4h4QBissyw==</DQ><InverseQ>EG02S7SADhH1EVT9DD0Z62Y0uY7gIYvxX/uq+IzKSCwB8M2G7Qv9xgZQaQlLpCaeKbux3Y59hHM+KpamGL19Kg==</InverseQ><D>vmaYHEbPAgOJvaEXQl+t8DQKFT1fudEysTy31LTyXjGu6XiltXXHUuZaa2IPyHgBz0Nd7znwsW/S44iql0Fen1kzKioEL3svANui63O3o5xdDeExVM6zOf1wUUh/oldovPweChyoAdMtUzgvCbJk1sYDJf++Nr0FeNW1RB1XG30=</D></RSAKeyValue>"; RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); byte[] cipherbytes; rsa.FromXmlString(privatekey); cipherbytes = rsa.Decrypt(Convert.FromBase64String(content), false); return Encoding.UTF8.GetString(cipherbytes); }
總結:加密解密算法博大精深,這裏只是爲了咱們使用起來方便,有現成的算法(即便這樣依然有人敢告訴我這個方法不知道怎麼調用)供咱們快速調用,對於祕鑰自己這裏不作過多探討了,有興趣的咱們能夠事後研究交流。鄙人也是初涉加密解密領域,各類不足,各位看官輕噴。加密