public async Task <string> DecryptMessage(DecryptionPackage decryptionPackage)
{
var keyPair = await GenerateKeyPair();
var decryptedMessage = Sodium.PublicKeyBox
.Open(decryptionPackage.Message, decryptionPackage.Nonce, keyPair.PrivateKey, decryptionPackage.PublicKey);
return(Encoding.UTF8.GetString(decryptedMessage));
}
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
var packetElements = _messageText.Split("|");
contactService = new ContactService();
var contacts = contactService.GetContacts();
var sender = contacts.SingleOrDefault(x => x.Id == packetElements[0]);
if (sender == null)
{
// TODO: If sender is null then user could be re-opening a message they sent - check contactId
}
else
{
var nonce = Convert.FromBase64String(packetElements[1]);
var encryptedMessage = Convert.FromBase64String(packetElements[2]);
var senderPublicKey = Convert.FromBase64String(sender.PublicKey);
decryptionPackage = new DecryptionPackage(encryptedMessage, nonce, senderPublicKey);
}
}
