Beispiel #1
0
        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;
            }
        }
Beispiel #2
0
        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;
            }
        }