public TextSecureAxolotlStore()
{
connection = new SQLiteConnection(new SQLite.Net.Platform.WinRT.SQLitePlatformWinRT(), AXOLOTLDB_PATH);
this.preKeyStore = new TextSecurePreKeyStore(connection);
this.signedPreKeyStore = new TextSecurePreKeyStore(connection);
this.identityKeyStore = new TextSecureIdentityKeyStore(connection);
this.sessionStore = new TextSecureSessionStore(connection);
}
public TextSecureAxolotlStore()
{
connection = new SQLiteConnection(new SQLite.Net.Platform.WinRT.SQLitePlatformWinRT(), AXOLOTLDB_PATH);
this.preKeyStore = new TextSecurePreKeyStore(connection);
this.signedPreKeyStore = new TextSecurePreKeyStore(connection);
this.identityKeyStore = new TextSecureIdentityKeyStore(connection);
this.sessionStore = new TextSecureSessionStore(connection);
}
/**
* Construct a SessionCipher for encrypt/decrypt operations on a session.
* In order to use SessionCipher, a session must have already been created
* and stored using {@link SessionBuilder}.
*
* @param sessionStore The {@link SessionStore} that contains a session for this recipient.
* @param remoteAddress The remote address that messages will be encrypted to or decrypted from.
*/
public SessionCipher(SessionStore sessionStore, PreKeyStore preKeyStore,
SignedPreKeyStore signedPreKeyStore, IdentityKeyStore identityKeyStore,
AxolotlAddress remoteAddress)
{
this.sessionStore = sessionStore;
this.preKeyStore = preKeyStore;
this.remoteAddress = remoteAddress;
this.sessionBuilder = new SessionBuilder(sessionStore, preKeyStore, signedPreKeyStore,
identityKeyStore, remoteAddress);
}
/**
* Construct a SessionCipher for encrypt/decrypt operations on a session.
* In order to use SessionCipher, a session must have already been created
* and stored using {@link SessionBuilder}.
*
* @param sessionStore The {@link SessionStore} that contains a session for this recipient.
* @param remoteAddress The remote address that messages will be encrypted to or decrypted from.
*/
public SessionCipher(SessionStore sessionStore, PreKeyStore preKeyStore,
SignedPreKeyStore signedPreKeyStore, IdentityKeyStore identityKeyStore,
AxolotlAddress remoteAddress)
{
this.sessionStore = sessionStore;
this.preKeyStore = preKeyStore;
this.remoteAddress = remoteAddress;
this.sessionBuilder = new SessionBuilder(sessionStore, preKeyStore, signedPreKeyStore,
identityKeyStore, remoteAddress);
}
/**
* Constructs a SessionBuilder.
*
* @param sessionStore The {@link org.whispersystems.libsignal.state.SessionStore} to store the constructed session in.
* @param preKeyStore The {@link org.whispersystems.libsignal.state.PreKeyStore} where the client's local {@link org.whispersystems.libsignal.state.PreKeyRecord}s are stored.
* @param identityKeyStore The {@link org.whispersystems.libsignal.state.IdentityKeyStore} containing the client's identity key information.
* @param remoteAddress The address of the remote user to build a session with.
*/
public SessionBuilder(SessionStore sessionStore,
PreKeyStore preKeyStore,
SignedPreKeyStore signedPreKeyStore,
IdentityKeyStore identityKeyStore,
SignalProtocolAddress remoteAddress)
{
this.sessionStore = sessionStore;
this.preKeyStore = preKeyStore;
this.signedPreKeyStore = signedPreKeyStore;
this.identityKeyStore = identityKeyStore;
this.remoteAddress = remoteAddress;
}
/**
* Constructs a SessionBuilder.
*
* @param sessionStore The {@link org.whispersystems.libaxolotl.state.SessionStore} to store the constructed session in.
* @param preKeyStore The {@link org.whispersystems.libaxolotl.state.PreKeyStore} where the client's local {@link org.whispersystems.libaxolotl.state.PreKeyRecord}s are stored.
* @param identityKeyStore The {@link org.whispersystems.libaxolotl.state.IdentityKeyStore} containing the client's identity key information.
* @param remoteAddress The address of the remote user to build a session with.
*/
public SessionBuilder(SessionStore sessionStore,
PreKeyStore preKeyStore,
SignedPreKeyStore signedPreKeyStore,
IdentityKeyStore identityKeyStore,
AxolotlAddress remoteAddress)
{
this.sessionStore = sessionStore;
this.preKeyStore = preKeyStore;
this.signedPreKeyStore = signedPreKeyStore;
this.identityKeyStore = identityKeyStore;
this.remoteAddress = remoteAddress;
}
//--------------------------------------------------------Constructor:----------------------------------------------------------------\\
#region --Constructors--
/// <summary>
/// Basic Constructor
/// </summary>
/// <history>
/// 06/08/2018 Created [Fabian Sauter]
/// </history>
public OmemoHelper(XMPPConnection2 connection)
{
this.CONNECTION = connection;
this.OMEMO_SESSIONS = new Dictionary <string, OmemoSession>();
this.MESSAGE_CACHE = new Dictionary <string, Tuple <List <OmemoMessageMessage>, OmemoSessionBuildHelper> >();
this.SESSION_STORE = new OmemoSessionStore(connection.account);
this.PRE_KEY_STORE = new OmemoPreKeyStore(connection.account);
this.SIGNED_PRE_KEY_STORE = new OmemoSignedPreKeyStore(connection.account);
this.IDENTITY_STORE = new OmemoIdentityKeyStore(connection.account);
reset();
}
protected override void OnCreate(Bundle bundle)
{
// Getting saved data
ISharedPreferences sharedPref = PreferenceManager.GetDefaultSharedPreferences(this);
User SelectedFriend = JsonConvert.DeserializeObject <User>(sharedPref.GetString("SelectedFriend", string.Empty));
List <Models.Message> SelectedFriendMessageList = new List <Models.Message>();
SelectedFriendMessageList = JsonConvert.DeserializeObject <List <Models.Message> >(sharedPref.GetString("SelectedFriendMessageList", string.Empty));
foreach (Models.Message m in SelectedFriendMessageList)
{
SelectedFriend.SelectedUserMessages.Add(m);
}
InMemorySessionStore sessionStore = JsonConvert.DeserializeObject <InMemorySessionStore>(sharedPref.GetString("SessionStore", string.Empty));
var allSessions = JsonConvert.DeserializeObject <List <Session> >(sharedPref.GetString("AllSessions", string.Empty));
foreach (Session item in allSessions)
{
sessionStore.StoreSession(item.Name, item.DeviceID, item.array);
}
PreKeyStore preKeyStore = JsonConvert.DeserializeObject <InMemoryPreKeyStore>(sharedPref.GetString("PreKeyStore", string.Empty));
SignedPreKeyStore signedPreKeyStore = JsonConvert.DeserializeObject <InMemorySignedPreKeyStore>(sharedPref.GetString("SignedPreKeyStore", string.Empty));
InMemoryIdentityKeyStore identityStore = JsonConvert.DeserializeObject <InMemoryIdentityKeyStore>(sharedPref.GetString("IdentityStore", string.Empty));
IdentityKeyPair KeyPair = new IdentityKeyPair(JsonConvert.DeserializeObject <byte[]>(sharedPref.GetString("IdentityKeyPair", string.Empty)));
uint RegistrationID = Convert.ToUInt32(sharedPref.GetString("RegistrationId", string.Empty));
identityStore.PutValues(KeyPair, RegistrationID);
var allTrustedKeys = JsonConvert.DeserializeObject <List <TrustedKey> >(sharedPref.GetString("AllTrustedKeys", string.Empty));
foreach (TrustedKey item in allTrustedKeys)
{
identityStore.SaveIdentity(item.Name, new IdentityKey(item.Identity, 0));
}
SignalProtocolAddress SelectedFriendAddress = new SignalProtocolAddress(SelectedFriend.RegisterationID.ToString(), 1);
// Get the messages from the server
base.OnCreate(bundle);
TheirMessages = GetMessages(sharedPref, SelectedFriend, sessionStore, preKeyStore, signedPreKeyStore, identityStore, SelectedFriendAddress);
// Set our view from the "ChatList" layout resource
Title = SelectedFriend.Username;
SetContentView(Resource.Layout.Message);
listView = FindViewById <ListView>(Resource.Id.messageList);
//***display FriendsListItem in ListView using Adapter
listView.Adapter = adapter = new Adapter(this, TheirMessages, UserID);
messageText = FindViewById <EditText>(Resource.Id.messageText);
sendButton = FindViewById <Button>(Resource.Id.sendButton);
// **implement messages sending and receiving here
//listView.Adapter = adapter = new Adapter(this);
sendButton.Click += (sender, e) =>
{
SessionCipher sessionCipher = new SessionCipher(sessionStore, preKeyStore, signedPreKeyStore, identityStore, SelectedFriendAddress);
CiphertextMessage cipherMessage = sessionCipher.encrypt(Encoding.UTF8.GetBytes(messageText.Text));
SelectedFriend.SelectedUserMessages.Add(new Models.Message()
{
MessageID = 1,
MessageReceiverRegisID = SelectedFriend.RegisterationID,
MessageSenderRegisID = RegistrationID,
MessageText = messageText.Text,
MessageTimestamp = DateTime.Now
});
// Save stores in local Database
ISharedPreferences sharedprefs = PreferenceManager.GetDefaultSharedPreferences(this);
ISharedPreferencesEditor editor = sharedprefs.Edit();
SelectedFriendMessageList.Clear();
foreach (Models.Message m in SelectedFriend.SelectedUserMessages)
{
SelectedFriendMessageList.Add(m);
}
editor.PutString("SelectedFriendMessageList", JsonConvert.SerializeObject(SelectedFriendMessageList));
editor.PutString("SelectedFriend", JsonConvert.SerializeObject(SelectedFriend));
editor.PutString("PreKeyStore", JsonConvert.SerializeObject(preKeyStore));
editor.PutString("SignedPreKeyStore", JsonConvert.SerializeObject(signedPreKeyStore));
List <Session> AllSessions = sessionStore.GetAllSessions();
editor.PutString("AllSessions", JsonConvert.SerializeObject(AllSessions));
editor.PutString("SessionStore", JsonConvert.SerializeObject(sessionStore));
editor.PutString("IdentityStore", JsonConvert.SerializeObject(identityStore));
List <TrustedKey> AllTrustedKeys = identityStore.GetAllTrustedKeys();
editor.PutString("AllTrustedKeys", JsonConvert.SerializeObject(AllTrustedKeys));
editor.Apply();
Models.Message message = new Models.Message();
message.MessageID = 4;
message.MessageReceiverRegisID = SelectedFriend.RegisterationID;
message.MessageSenderRegisID = Convert.ToUInt32(sharedPref.GetString("RegistrationId", string.Empty));
message.MessageText = JsonConvert.SerializeObject(cipherMessage.serialize());
message.MessageTimestamp = DateTime.Now;
// call SendMessage() to send the
SendMessage(message);
// *display the messages in user's own screen using adapter (always display in MyMessageListItem).
adapter.NotifyDataSetInvalidated();
listView.SetSelection(adapter.Count);
};
}
public Models.Message[] GetMessages(ISharedPreferences sharedPref, User SelectedFriend, SessionStore sessionStore,
PreKeyStore preKeyStore, SignedPreKeyStore signedPreKeyStore, IdentityKeyStore identityStore, SignalProtocolAddress SelectedFriendAddress)
{
// send the server the user name
// server side does the selection and return the messages and store it in a message array.
//Send the login username and password to the server and get response
string apiUrl = "https://ycandgap.me/api_server2.php";
string apiMethod = "getMessage";
//Login_Request has two properties:username and password
Login_Request myLogin_Request = new Login_Request();
Models.Message recieveMessage = new Models.Message();
//get the login username from previow login page.
recieveMessage.MessageReceiverRegisID = Convert.ToUInt32(sharedPref.GetString("RegistrationId", string.Empty));
recieveMessage.MessageSenderRegisID = SelectedFriend.RegisterationID;
myLogin_Request.message = recieveMessage;
UserID = myLogin_Request.RegistrationID;
// make http post request
string response = Http.Post(apiUrl, new NameValueCollection()
{
{ "api_method", apiMethod },
{ "api_data", JsonConvert.SerializeObject(myLogin_Request) }
});
// decode json string to dto object
API_Response2 r = JsonConvert.DeserializeObject <API_Response2>(response);
// check response
if (r != null)
{
if (!r.IsError && !string.IsNullOrEmpty(r.MessageText))
{
SessionCipher sessionCipher = new SessionCipher(sessionStore, preKeyStore, signedPreKeyStore, identityStore, SelectedFriendAddress);
byte[] decipherMessage;
if (!sessionStore.ContainsSession(SelectedFriendAddress))
{
decipherMessage = sessionCipher.decrypt(new PreKeySignalMessage((JsonConvert.DeserializeObject <byte[]>(r.MessageText))));
}
else
{
decipherMessage = sessionCipher.decrypt(new SignalMessage((JsonConvert.DeserializeObject <byte[]>(r.MessageText))));
}
string checkMessage = Encoding.UTF8.GetString(decipherMessage);
SelectedFriend.SelectedUserMessages.Add(new Models.Message
{
MessageID = r.MessageID,
MessageSenderRegisID = r.MessageSenderRegisID,
MessageReceiverRegisID = r.MessageReceiverRegisID,
MessageText = checkMessage,
MessageTimestamp = r.MessageTimestamp
});
return(SelectedFriend.SelectedUserMessages.ToArray());
}
else
{
//if login fails, pop up an alert message. Wrong username or password or a new user
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
if (!string.IsNullOrEmpty(r.ErrorMessage))
{
dialogBuilder.SetMessage(r.ErrorMessage);
}
else
{
dialogBuilder.SetMessage("No new messages");
}
//dialogBuilder.SetPositiveButton("Ok", null);
dialogBuilder.Show();
return(null);
}
}
else
{
if (!sessionStore.ContainsSession(SelectedFriendAddress))
{
// Instantiate a SessionBuilder for a remote recipientId + deviceId tuple.
SessionBuilder sessionBuilder = new SessionBuilder(sessionStore, preKeyStore, signedPreKeyStore,
identityStore, SelectedFriendAddress);
RetrievedPreKey preKeyPublic = RetrieveSelectedFriendPublicPreKey(SelectedFriend);
IdentityKey SelectedFriendSignedPreKey = new IdentityKey(JsonConvert.DeserializeObject <byte[]>(SelectedFriend.SignedPreKey), 0);
PreKeyBundle retrievedPreKey = new PreKeyBundle(SelectedFriend.RegisterationID, 1, preKeyPublic.PrekeyID, preKeyPublic.PublicPreKey.getPublicKey()
, SelectedFriend.SignedPreKeyID, SelectedFriendSignedPreKey.getPublicKey(), JsonConvert.DeserializeObject <byte[]>(SelectedFriend.SignedPreKeySignature)
, new IdentityKey(JsonConvert.DeserializeObject <byte[]>(SelectedFriend.IdentityKey), 0));
// Build a session with a PreKey retrieved from the server.
sessionBuilder.process(retrievedPreKey);
}
return(null);
}
}
