public override void OpenedRead()
{
if (ttl != 0)
{
for (int i = messages.Count - 1; i >= 0; i--)
{
MessageModel meseModel = messages[i];
MessageModelEncryptedDelivered message = meseModel as MessageModelEncryptedDelivered;
if (message != null && !message.IsOut)
{
if (message.IsSetTTL)
{
break;
}
if (message.Unread)
{
DelayedDestroyMessage(message);
}
}
}
}
base.OpenedRead();
}
public void MarkEncryptedRead(int maxDate, int date)
{
for (int i = messages.Count - 1; i >= 0; i--)
{
MessageModel meseModel = messages[i];
MessageModelEncryptedDelivered message = meseModel as MessageModelEncryptedDelivered;
if (message != null)
{
if (message.Date > maxDate)
{
continue;
}
if (message.IsSetTTL)
{
break;
}
if (message.Unread)
{
message.MarkRead();
if (ttl != 0)
{
DelayedDestroyMessage(message);
}
}
}
}
}
public override async Task <bool> SendMessage(string message)
{
try {
logger.info("send message with key: {0}", BitConverter.ToString(key).Replace("-", "").ToLower());
long messageId = Helpers.GenerateRandomLong();
DecryptedMessage msg = TL.decryptedMessage(messageId, Helpers.GenerateRandomBytes(128), message, TL.decryptedMessageMediaEmpty());
byte[] data;
using (MemoryStream memory = new MemoryStream()) {
using (BinaryWriter writer = new BinaryWriter(memory)) {
msg.Write(writer);
data = memory.ToArray();
}
}
using (MemoryStream memory = new MemoryStream()) {
using (BinaryWriter writer = new BinaryWriter(memory)) {
writer.Write(data.Length);
writer.Write(data);
data = memory.ToArray();
}
}
byte[] msgKey = Helpers.CalcMsgKey(data);
AESKeyData aesKey = Helpers.CalcKey(key, msgKey, true);
data = AES.EncryptAES(aesKey, data);
using (MemoryStream memory = new MemoryStream()) {
using (BinaryWriter writer = new BinaryWriter(memory)) {
writer.Write(fingerprint);
writer.Write(msgKey);
writer.Write(data);
data = memory.ToArray();
}
}
Messages_sentEncryptedMessageConstructor sent = (Messages_sentEncryptedMessageConstructor)await session.Api.messages_sendEncrypted(InputEncryptedChat, messageId, data);
MessageModel messageModel = new MessageModelEncryptedDelivered(TelegramSession.Instance.SelfId, OpponentId, sent.date, true, true, msg, TL.encryptedFileEmpty());
messages.Add(messageModel);
TelegramSession.Instance.Dialogs.Model.UpDialog(this);
return(true);
} catch (Exception e) {
logger.error("send encrypted message exception: {0}", e);
return(false);
}
}
public override async Task<bool> SendMessage(string message) {
try {
logger.info("send message with key: {0}", BitConverter.ToString(key).Replace("-", "").ToLower());
long messageId = Helpers.GenerateRandomLong();
DecryptedMessage msg = TL.decryptedMessage(messageId, Helpers.GenerateRandomBytes(128), message, TL.decryptedMessageMediaEmpty());
byte[] data;
using(MemoryStream memory = new MemoryStream()) {
using(BinaryWriter writer = new BinaryWriter(memory)) {
msg.Write(writer);
data = memory.ToArray();
}
}
using(MemoryStream memory = new MemoryStream()) {
using(BinaryWriter writer = new BinaryWriter(memory)) {
writer.Write(data.Length);
writer.Write(data);
data = memory.ToArray();
}
}
byte[] msgKey = Helpers.CalcMsgKey(data);
AESKeyData aesKey = Helpers.CalcKey(key, msgKey, true);
data = AES.EncryptAES(aesKey, data);
using(MemoryStream memory = new MemoryStream()) {
using(BinaryWriter writer = new BinaryWriter(memory)) {
writer.Write(fingerprint);
writer.Write(msgKey);
writer.Write(data);
data = memory.ToArray();
}
}
Messages_sentEncryptedMessageConstructor sent = (Messages_sentEncryptedMessageConstructor) await session.Api.messages_sendEncrypted(InputEncryptedChat, messageId, data);
MessageModel messageModel = new MessageModelEncryptedDelivered(TelegramSession.Instance.SelfId, OpponentId, sent.date, true, true, msg, TL.encryptedFileEmpty());
messages.Add(messageModel);
TelegramSession.Instance.Dialogs.Model.UpDialog(this);
return true;
} catch(Exception e) {
logger.error("send encrypted message exception: {0}", e);
return false;
}
}
// in background thread
public void ReceiveMessage(EncryptedMessage encryptedMessage) {
try {
if(encryptedMessage.Constructor == Constructor.encryptedMessage) {
logger.info("simple encrypted message");
EncryptedMessageConstructor encryptedMessageConstructor = (EncryptedMessageConstructor) encryptedMessage;
byte[] data = encryptedMessageConstructor.bytes;
byte[] msgKey;
long keyFingerprint;
logger.info("encrypted message data: {0}", BitConverter.ToString(data).Replace("-", "").ToLower());
using(MemoryStream memory = new MemoryStream(data)) {
using(BinaryReader reader = new BinaryReader(memory)) {
keyFingerprint = reader.ReadInt64();
msgKey = reader.ReadBytes(16);
data = reader.ReadBytes(data.Length - 16 - 8);
}
}
if(fingerprint != keyFingerprint) {
logger.error("invalid key fingerprint");
return;
}
logger.info("ciphertext data: {0}", BitConverter.ToString(data).Replace("-", "").ToLower());
AESKeyData aesKey = Helpers.CalcKey(key, msgKey, true);
data = AES.DecryptAES(aesKey, data);
byte[] data2 = AES.EncryptAES(aesKey, data);
byte[] data3 = AES.DecryptAES(aesKey, data2);
logger.info("aes equals: {0}", data.SequenceEqual(data3));
logger.info("plaintext data: {0}", BitConverter.ToString(data).Replace("-", "").ToLower());
logger.info("two-transformed plaintext: {0}", BitConverter.ToString(data3).Replace("-", "").ToLower());
byte[] calculatedMsgKey;
using(MemoryStream memory = new MemoryStream(data)) {
using(BinaryReader reader = new BinaryReader(memory)) {
int len = reader.ReadInt32();
logger.info("readed len = {0}, actual len = {1}", len, data.Length - 4);
if(len < 0 || len > data.Length - 4) {
return;
}
calculatedMsgKey = Helpers.CalcMsgKey(data, 0, 4 + len);
data = reader.ReadBytes(len);
}
}
if(!msgKey.SequenceEqual(calculatedMsgKey)) {
logger.info("incalid msg key: data {0}, sha1 {1}, received msg key {2}", BitConverter.ToString(data), BitConverter.ToString(Helpers.sha1(data)), BitConverter.ToString(msgKey));
return;
}
DecryptedMessage decryptedMessage;
using(MemoryStream memory = new MemoryStream(data)) {
using(BinaryReader reader = new BinaryReader(memory)) {
//DecryptedMessageLayerConstructor layer = (DecryptedMessageLayerConstructor) TL.Parse<DecryptedMessageLayer>(reader);
// if(layer.layer > 8) {
// logger.info("encrypted message layer {0} - need upgrade", layer.layer);
// // TODO: notify - need upgrade
// return;
// }
decryptedMessage = TL.Parse<DecryptedMessage>(reader);
}
}
logger.info("decrypted message: {0}", decryptedMessage);
if(decryptedMessage.Constructor == Constructor.decryptedMessageService) {
DecryptedMessageAction action = ((DecryptedMessageServiceConstructor) decryptedMessage).action;
if(action.Constructor == Constructor.decryptedMessageActionSetMessageTTL) {
DecryptedMessageActionSetMessageTTLConstructor actionttl = (DecryptedMessageActionSetMessageTTLConstructor) action;
UpdateTTL(actionttl.ttl_seconds);
}
}
MessageModel messageModel = new MessageModelEncryptedDelivered(OpponentId, TelegramSession.Instance.SelfId, encryptedMessageConstructor.date, false, true, decryptedMessage, encryptedMessageConstructor.file);
Deployment.Current.Dispatcher.BeginInvoke(() => {
messages.Add(messageModel);
if (this == TelegramSession.Instance.Dialogs.OpenedDialog) {
OpenedRead();
}
});
}
} catch(Exception e) {
logger.error("dialog model receive encrypted message exception: {0}", e);
}
}
// in background thread
public void ReceiveMessage(EncryptedMessage encryptedMessage)
{
try {
if (encryptedMessage.Constructor == Constructor.encryptedMessage)
{
logger.info("simple encrypted message");
EncryptedMessageConstructor encryptedMessageConstructor = (EncryptedMessageConstructor)encryptedMessage;
byte[] data = encryptedMessageConstructor.bytes;
byte[] msgKey;
long keyFingerprint;
logger.info("encrypted message data: {0}", BitConverter.ToString(data).Replace("-", "").ToLower());
using (MemoryStream memory = new MemoryStream(data)) {
using (BinaryReader reader = new BinaryReader(memory)) {
keyFingerprint = reader.ReadInt64();
msgKey = reader.ReadBytes(16);
data = reader.ReadBytes(data.Length - 16 - 8);
}
}
if (fingerprint != keyFingerprint)
{
logger.error("invalid key fingerprint");
return;
}
logger.info("ciphertext data: {0}", BitConverter.ToString(data).Replace("-", "").ToLower());
AESKeyData aesKey = Helpers.CalcKey(key, msgKey, true);
data = AES.DecryptAES(aesKey, data);
byte[] data2 = AES.EncryptAES(aesKey, data);
byte[] data3 = AES.DecryptAES(aesKey, data2);
logger.info("aes equals: {0}", data.SequenceEqual(data3));
logger.info("plaintext data: {0}", BitConverter.ToString(data).Replace("-", "").ToLower());
logger.info("two-transformed plaintext: {0}", BitConverter.ToString(data3).Replace("-", "").ToLower());
byte[] calculatedMsgKey;
using (MemoryStream memory = new MemoryStream(data)) {
using (BinaryReader reader = new BinaryReader(memory)) {
int len = reader.ReadInt32();
logger.info("readed len = {0}, actual len = {1}", len, data.Length - 4);
if (len < 0 || len > data.Length - 4)
{
return;
}
calculatedMsgKey = Helpers.CalcMsgKey(data, 0, 4 + len);
data = reader.ReadBytes(len);
}
}
if (!msgKey.SequenceEqual(calculatedMsgKey))
{
logger.info("incalid msg key: data {0}, sha1 {1}, received msg key {2}", BitConverter.ToString(data), BitConverter.ToString(Helpers.sha1(data)), BitConverter.ToString(msgKey));
return;
}
DecryptedMessage decryptedMessage;
using (MemoryStream memory = new MemoryStream(data)) {
using (BinaryReader reader = new BinaryReader(memory)) {
//DecryptedMessageLayerConstructor layer = (DecryptedMessageLayerConstructor) TL.Parse<DecryptedMessageLayer>(reader);
// if(layer.layer > 8) {
// logger.info("encrypted message layer {0} - need upgrade", layer.layer);
// // TODO: notify - need upgrade
// return;
// }
decryptedMessage = TL.Parse <DecryptedMessage>(reader);
}
}
logger.info("decrypted message: {0}", decryptedMessage);
if (decryptedMessage.Constructor == Constructor.decryptedMessageService)
{
DecryptedMessageAction action = ((DecryptedMessageServiceConstructor)decryptedMessage).action;
if (action.Constructor == Constructor.decryptedMessageActionSetMessageTTL)
{
DecryptedMessageActionSetMessageTTLConstructor actionttl = (DecryptedMessageActionSetMessageTTLConstructor)action;
UpdateTTL(actionttl.ttl_seconds);
}
}
MessageModel messageModel = new MessageModelEncryptedDelivered(OpponentId, TelegramSession.Instance.SelfId, encryptedMessageConstructor.date, false, true, decryptedMessage, encryptedMessageConstructor.file);
Deployment.Current.Dispatcher.BeginInvoke(() => {
messages.Add(messageModel);
if (this == TelegramSession.Instance.Dialogs.OpenedDialog)
{
OpenedRead();
}
});
}
} catch (Exception e) {
logger.error("dialog model receive encrypted message exception: {0}", e);
}
}
