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C#实现RSA加密和解密详解

發布時間：2024/4/14 C# 30 豆豆

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C#實現RSA加密和解密詳解原文:C#實現RSA加密和解密詳解

RSA加密解密源碼：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;

namespace MyRSA
{
publicclass MyRSA
...{

privatestaticstring publicKey =
"<RSAKeyValue><Modulus>6CdsXgYOyya/yQH"+
"TO96dB3gEurM2UQDDVGrZoe6RcAVTxAqDDf5L"+
"wPycZwtNOx3Cfy44/D5Mj86koPew5soFIz9sx"+
"PAHRF5hcqJoG+q+UfUYTHYCsMH2cnqGVtnQiE"+
"/PMRMmY0RwEfMIo+TDpq3QyO03MaEsDGf13sP"+
"w9YRXiac=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
privatestaticstring 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>";

staticpublicstring 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"";
}
}

staticpublicstring 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"";
}

}

staticprivatebyte[] 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);

returnnull;
}

}

staticprivatebyte[] 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);

returnnull;
}
}
}
}

namespace MyRSA

...{

publicclass MyRSA

...{

privatestaticstring publicKey =

??? "<RSAKeyValue><Modulus>6CdsXgYOyya/yQH"+

??? "TO96dB3gEurM2UQDDVGrZoe6RcAVTxAqDDf5L"+

??? "wPycZwtNOx3Cfy44/D5Mj86koPew5soFIz9sx"+

??? "PAHRF5hcqJoG+q+UfUYTHYCsMH2cnqGVtnQiE"+

??? "/PMRMmY0RwEfMIo+TDpq3QyO03MaEsDGf13sP"+

??? "w9YRXiac=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";

privatestaticstring 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>";

staticpublicstring 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"";

??? }

}

staticpublicstring 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"";

??? }

}

staticprivatebyte[] 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);

??????? returnnull;

??? }

}

staticprivatebyte[] 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);

??????? returnnull;

??? }

}

}

}
?測試代碼：

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

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

????????????Console.ReadLine();
????????} posted on 2014-11-14 20:00 NET未來之路閱讀(...) 評論(...) 編輯收藏

轉載于:https://www.cnblogs.com/lonelyxmas/p/4098069.html

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