public void AssignNewRSAKey(bool storeKeysInDB = false)
{
// here we are saying we want to use a 2048 bit key
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(2048))
{
RSA.PersistKeyInCsp = false;
_publicKey = RSA.ExportParameters(false);
_privateKey = RSA.ExportParameters(true);
if (storeKeysInDB)
{
RSAKeys rsaKeys = new RSAKeys();
rsaKeys.RsaPrivateKey = RSA.ToXmlString(true); // true gets the private key
rsaKeys.RsaPublicKey = RSA.ToXmlString(false); // false gets the public key
_jsonDataBaseInstance = new JSONDataBase();
_jsonDataBaseInstance.AddRSAKey(rsaKeys);
}
}
}
public byte[] EncryptDataUsingRSA(byte[] dataToEncrypt, bool getKeyFromDataBase = false)
{
byte[] cipherBytes;
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(2048))
{
RSA.PersistKeyInCsp = false;
if (getKeyFromDataBase)
{
RSAKeys rsaKeys = _jsonDataBaseInstance.GetRSAKeys();
RSA.FromXmlString(rsaKeys.RsaPublicKey);
}
else
{
RSA.ImportParameters(_publicKey);
}
cipherBytes = RSA.Encrypt(dataToEncrypt, true);
}
return(cipherBytes);
}
public byte[] DecryptDataUsingRSA(byte[] dataToEncrypt, bool getKeyFromDataBase = false)
{
byte[] dataToSendBack;
// using a 2048 bit key
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(2048))
{
RSA.PersistKeyInCsp = false; // is set to false because we are not using the key container
if (getKeyFromDataBase)
{
RSAKeys rsaKeys = _jsonDataBaseInstance.GetRSAKeys();
RSA.FromXmlString(rsaKeys.RsaPrivateKey);
}
else
{
RSA.ImportParameters(_privateKey);
}
dataToSendBack = RSA.Decrypt(dataToEncrypt, true); // setting true here adds a padding scheme as an extra protection for our data
}
return(dataToSendBack);
}
