public String RsaDecrypt(String input, RSAEntity entity)
{
if (String.IsNullOrEmpty(input))
{
return(null);
}
try
{
byte[] keybuf = Convert.FromBase64String(input);
//Create a new instance of RSACryptoServiceProvider.
var RSA = new RSACryptoServiceProvider();
//Import the RSA Key information. This only needs
//toinclude the public key information.
var objRsaPars = new RSAParameters();
objRsaPars.Modulus = entity.Modulus;
objRsaPars.Exponent = entity.Exponent;
objRsaPars.P = entity.P;
objRsaPars.Q = entity.Q;
objRsaPars.DP = entity.DP;
objRsaPars.DQ = entity.DQ;
objRsaPars.InverseQ = entity.InverseQ;
objRsaPars.D = entity.D;
RSA.ImportParameters(objRsaPars);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return(Encoding.UTF8.GetString(RSA.Decrypt(keybuf, false)));
}
//Catch and display a CryptographicException
catch (CryptographicException e)
{
//return null;
throw e;
}
}
public String RsaEncrypt(String input, RSAEntity entity)
{
input = Byte2Hex(Hex2Byte(input));
if (String.IsNullOrEmpty(input))
{
return(null);
}
try
{
byte[] inbuf = Encoding.UTF8.GetBytes(input);
//Create a new instance of RSACryptoServiceProvider.
var rsa = new RSACryptoServiceProvider();
//Import the RSA Key information. This only needs
//toinclude the public key information.
var objRsaPars = new RSAParameters
{
Modulus = entity.Modulus,
Exponent = entity.Exponent
};
rsa.ImportParameters(objRsaPars);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return(Convert.ToBase64String(rsa.Encrypt(inbuf, false)));
}
//Catch and display a CryptographicException
catch (CryptographicException e)
{
//return null;
throw e;
}
}
