public byte[] DecryptData(EncryptedPacket encryptedpacket, RSAWithRSAParameterKey rsaParams)
{
// Decrypt AES Key with RSA
var decryptedSessionKey = rsaParams.DecryptData(encryptedpacket.EncryptedSessionKey);
// Decrypt our data with AES using the decrypted session key
var decryptedData = _aes.Decrypt(encryptedpacket.EncryptedData,
decryptedSessionKey, encryptedpacket.Iv);
return(decryptedData);
}
public EncryptedPacket EncryptData(byte[] original, RSAWithRSAParameterKey rsaParams)
{
// Generate our session key.
var sessionKey = _aes.GenerateRandomNumber(32);
// Create the encrypted packet and generate the IV
var encryptedPacket = new EncryptedPacket {
Iv = _aes.GenerateRandomNumber(16)
};
// Encrypt our data with AES
encryptedPacket.EncryptedData = _aes.Encrypt(original, sessionKey, encryptedPacket.Iv);
// Encrypt the session key with RSA
encryptedPacket.EncryptedSessionKey = rsaParams.EncryptData(sessionKey);
return(encryptedPacket);
}