public void ExchangeKeys(string targetUsername)
{
try
{
foreach (CryptographyHelper key in Ledger.KeysManifest)
{
if ((key.Receiver_Username == targetUsername ||
key.Sender_Username == targetUsername) &&
(key.Receiver_Username == this.Username ||
key.Sender_Username == this.Username)
)
{
MessageBox.Show("Coordinator: Keys are already exchanged.");
return;
}
}
CryptographyHelper newKey = new CryptographyHelper(
Sender_Username: this.Username,
Receiver_Username: targetUsername
);
Ledger.KeysManifest.Add(newKey);
}
catch (Exception ex)
{
MessageBox.Show($"Client : {ex.Message.ToString()}");
}
}
public void ExchangeKeysWithServer(string targetUsername)
{
foreach (CryptographyHelper key in Ledger.KeysManifest)
{
if ((key.Receiver_Username == targetUsername ||
key.Sender_Username == targetUsername) &&
(key.Receiver_Username == this.UsersList[0].Username ||
key.Sender_Username == this.UsersList[0].Username)
)
{
MessageBox.Show("Coordinator: Keys are already exchanged.");
return;
}
}
CryptographyHelper newKey = new CryptographyHelper(
Sender_Username: this.UsersList[0].Username,
Receiver_Username: targetUsername
);
Ledger.KeysManifest.Add(newKey);
}