C#实现RSA加密和解密详解

RSA加密解密源码：

public class MyRSA{private static string publicKey = "<RSAKeyValue><Modulus>6CdsXgYOyya/yQH" +"TO96dB3gEurM2UQDDVGrZoe6RcAVTxAqDDf5L" + "wPycZwtNOx3Cfy44/D5Mj86koPew5soFIz9sx" +"PAHRF5hcqJoG+q+UfUYTHYCsMH2cnqGVtnQiE" +"/PMRMmY0RwEfMIo+TDpq3QyO03MaEsDGf13sP" +"w9YRXiac=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";private static string privateKey = "<RSAKeyValue><Modulus>6CdsXgYOyya/yQH" +"TO96dB3gEurM2UQDDVGrZoe6RcAVTxAqDDf5L" +"wPycZwtNOx3Cfy44/D5Mj86koPew5soFIz9sx" +"PAHRF5hcqJoG+q+UfUYTHYCsMH2cnqGVtnQiE" +"/PMRMmY0RwEfMIo+TDpq3QyO03MaEsDGf13sP" +"w9YRXiac=</Modulus><Exponent>AQAB</Exponent>" +"<P>/aoce2r6tonjzt1IQI6FM4ysR40j/gKvt4d" +"L411pUop1Zg61KvCm990M4uN6K8R/DUvAQdrRd" +"VgzvvAxXD7ESw==</P><Q>6kqclrEunX/fmOle" +"VTxG4oEpXY4IJumXkLpylNR3vhlXf6ZF9obEpG" +"lq0N7sX2HBxa7T2a0WznOAb0si8FuelQ==</Q>" +"<DP>3XEvxB40GD5v/Rr4BENmzQW1MBFqpki6FU" +"GrYiUd2My+iAW26nGDkUYMBdYHxUWYlIbYo6Te" +"zc3d/oW40YqJ2Q==</DP><DQ>LK0XmQCmY/ArY" +"gw2Kci5t51rluRrl4f5l+aFzO2K+9v3PGcndjA" +"StUtIzBWGO1X3zktdKGgCLlIGDrLkMbM21Q==</DQ><InverseQ>" +"GqC4Wwsk2fdvJ9dmgYlej8mTDBWg0Wm6aqb5kjn" +"cWK6WUa6CfD+XxfewIIq26+4Etm2A8IAtRdwPl4" +"aPjSfWdA==</InverseQ><D>a1qfsDMY8DSxB2D" +"Cr7LX5rZHaZaqDXdO3GC01z8dHjI4dDVwOS5ZFZ" +"s7MCN3yViPsoRLccnVWcLzOkSQF4lgKfTq3IH40" +"H5N4gg41as9GbD0g9FC3n5IT4VlVxn9ZdW+WQry" +"oHdbiIAiNpFKxL/DIEERur4sE1Jt9VdZsH24CJE=</D></RSAKeyValue>";static public string Decrypt(string base64code){try{//Create a UnicodeEncoder to convert between byte array and string.        UnicodeEncoding ByteConverter = new UnicodeEncoding();//Create a new instance of RSACryptoServiceProvider to generate//public and private key data.        RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();        RSA.FromXmlString(privateKey);byte[] encryptedData;byte[] decryptedData;        encryptedData = Convert.FromBase64String(base64code);//Pass the data to DECRYPT, the private key information //(using RSACryptoServiceProvider.ExportParameters(true),//and a boolean flag specifying no OAEP padding.        decryptedData = RSADecrypt(            encryptedData, RSA.ExportParameters(true), false);//Display the decrypted plaintext to the console.         return ByteConverter.GetString(decryptedData);    }catch (Exception exc){//Exceptions.LogException(exc);        Console.WriteLine(exc.Message);return "";    }}static public string Encrypt(string toEncryptString){try{//Create a UnicodeEncoder to convert between byte array and string.        UnicodeEncoding ByteConverter = new UnicodeEncoding();//Create byte arrays to hold original, encrypted, and decrypted data.        byte[] dataToEncrypt =             ByteConverter.GetBytes(toEncryptString);byte[] encryptedData;byte[] decryptedData;//Create a new instance of RSACryptoServiceProvider to generate//public and private key data.        RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();        RSA.FromXmlString(privateKey);//Pass the data to ENCRYPT, the public key information //(using RSACryptoServiceProvider.ExportParameters(false),//and a boolean flag specifying no OAEP padding.        encryptedData = RSAEncrypt(            dataToEncrypt, RSA.ExportParameters(false), false);string base64code = Convert.ToBase64String(encryptedData);return base64code;    }catch (Exception exc){//Catch this exception in case the encryption did//not succeed.//Exceptions.LogException(exc);        Console.WriteLine(exc.Message);return "";    }}static private byte[] RSAEncrypt(byte[] DataToEncrypt,     RSAParameters RSAKeyInfo, bool DoOAEPPadding){try{//Create a new instance of RSACryptoServiceProvider.        RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();//Import the RSA Key information. This only needs//toinclude the public key information.        RSA.ImportParameters(RSAKeyInfo);//Encrypt the passed byte array and specify OAEP padding.  //OAEP padding is only available on Microsoft Windows XP or//later.          return RSA.Encrypt(DataToEncrypt, DoOAEPPadding);    }//Catch and display a CryptographicException  //to the console.    catch (CryptographicException e){//Exceptions.LogException(e);        Console.WriteLine(e.Message);return null;    }}static private byte[] RSADecrypt(byte[] DataToDecrypt,    RSAParameters RSAKeyInfo,bool DoOAEPPadding){try{//Create a new instance of RSACryptoServiceProvider.        RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();//Import the RSA Key information. This needs//to include the private key information.        RSA.ImportParameters(RSAKeyInfo);//Decrypt the passed byte array and specify OAEP padding.  //OAEP padding is only available on Microsoft Windows XP or//later.          return RSA.Decrypt(DataToDecrypt, DoOAEPPadding);    }//Catch and display a CryptographicException  //to the console.    catch (CryptographicException e){//Exceptions.LogException(e);        Console.WriteLine(e.Message);return null;    }}}}

?测试代码：
????????static?void?Main(string[]?args)
????????{
????????????string?encodeString?=?MyRSA.Encrypt("1234567");
????????????Console.WriteLine(encodeString);


????????????string?decode?=?MyRSA.Decrypt(encodeString);
????????????Console.WriteLine(decode);

????????????Console.ReadLine();
????????}
?
?
转自：http://www.csharpwin.com/csharpspace/8761r456.shtml