void backupKeysToServer()
{
// Creates key and encrypts w/ password
PasswordBasedKeyHelper passHelper = new PasswordBasedKeyHelper("restoration" + mainUser.user_id);
passHelper.CreateKey(suppliedRestorePassword, mainUser.email);
suppliedRestorePassword = "";
// Creates dict of chatname:symkey
Dictionary <string, string> keysBackup = new Dictionary <string, string>();
var chatKeyValue = myChats.Keys.ToArray <string>();
for (int i = 0; i < chatKeyValue.Length; i++)
{
if (!myChats[chatKeyValue[i]].hasKey())
{
continue;
}
keysBackup[chatKeyValue[i]] = myChats[chatKeyValue[i]].getSharableKey();
}
// Serializes the keys and encrypts them
var serializedKeyPairs = JsonConvert.SerializeObject(keysBackup);
var encryptedSerializedKeyPairs = passHelper.EncryptDataToString(serializedKeyPairs);
string message = "{\"access_id\": \"" + this.access_id + "\", \"username\": \"" + mainUser.username + "\", \"backupData\": \"" + encryptedSerializedKeyPairs + "\"}";
serverConnection.WriteMessage("backupKeys", message);
}
void restoreKeysResponse(object sender, EventArgs e)
{
int messageIndex = serverConnection.unreadMessages.Count - 1;
if (messageIndex < 0)
{
return;
}
JObject message = JObject.Parse(serverConnection.unreadMessages[messageIndex]);
string type = serverConnection.interpretMessageType(message);
if (type == "restoreKeys")
{
// Gets data
string encryptedSerializedKeys = message[type].ToString();
// Creates password helper. suppliedRestorePassword must be supplied
PasswordBasedKeyHelper passHelper = new PasswordBasedKeyHelper("restoration" + mainUser.user_id);
passHelper.CreateKey(suppliedRestorePassword, mainUser.email);
// Deletes from memory
suppliedRestorePassword = "";
// Deserialies and decryptes the keys
string decryptedSerializedKeys = passHelper.DecryptDataFromString(encryptedSerializedKeys);
Dictionary <string, string> chatsKeysPair = JsonConvert.DeserializeObject <Dictionary <string, string> >(decryptedSerializedKeys);
// Puts keys into chat objects
var chatNames = chatsKeysPair.Keys.ToArray <string>();
for (int i = 0; i < chatNames.Length; i++)
{
var name = chatNames[i];
var symKey = chatsKeysPair[name];
myChats[name].loadChatKey(symKey);
}
// Saves to storage
saveChatsAndUsersToStorage();
}
}
