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);
}