public bool ParseQrCode(string qrData, out QrContact contact)
{
contact = null;
string[] elements = DecomposeQrData(qrData);
if (elements?.Length != QrElements.Count)
return false;
int userId;
if (!Int32.TryParse(elements[QrElements.IdIndex], NumberStyles.None, CultureInfo.InvariantCulture, out userId))
return false;
if (userId == _storageService.GetUser().Id)
return false;
string name = elements[QrElements.NameIndex];
string modulus = elements[QrElements.ModulusIndex];
string exponent = elements[QrElements.ExponentIndex];
string publicKey;
if (!RsaKeyTools.ComposePublicKey(modulus, exponent, out publicKey))
return false;
contact = new QrContact() { Name = name, PublicKey = publicKey, UserId = userId };
return true;
}
public void AddContact(QrContact contact)
{
_storageService.SaveContacts(new[] { new ContactItem
{
Id = contact.UserId,
PublicKey = contact.PublicKey,
IsNew = true,
Name = contact.Name
} });
var me = _storageService.GetUser();
_client.AddContact(new Contact
{
Name = me.Name ?? string.Empty,
PublicKey = _encryptionService.ExtractPublicKey(me.KeyPair),
ReceiverId = contact.UserId,
SenderId = me.Id
});
}