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telegram.cpp
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/*
* Copyright 2014 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Roberto Mier
* Tiago Herrmann
*/
#include "telegram.h"
#include <exception>
#include <stdexcept>
#include <openssl/sha.h>
#include <openssl/md5.h>
#include <QDebug>
#include <QLoggingCategory>
#include <QCryptographicHash>
#include <QFile>
#include <QFileInfo>
#include <QMimeDatabase>
#include <QtEndian>
#include <QImage>
#include <QImageReader>
#include <QCryptographicHash>
#include "util/tlvalues.h"
#include "telegram/types/types.h"
#include "core/dcprovider.h"
#include "telegram/telegramapi.h"
#include "secret/secretstate.h"
#include "secret/encrypter.h"
#include "secret/decrypter.h"
#include "file/filehandler.h"
#include "core/dcprovider.h"
#include "telegram/coretypes.h"
#include "secret/secretchat.h"
Q_LOGGING_CATEGORY(TG_TELEGRAM, "tg.telegram")
Q_LOGGING_CATEGORY(TG_LIB_SECRET, "tg.lib.secret")
#define CHECK_API if(!mApi) {qDebug() << __FUNCTION__ << "Error: API is not ready."; return 0;}
QSettings::Format qtelegram_default_settings_format = QSettings::IniFormat;
class TelegramPrivate
{
public:
TelegramPrivate() :
mLibraryState(Telegram::LoggedOut),
mLastRetryType(Telegram::NotRetry),
mSlept(false),
mSecretState(0) {}
Telegram::LibraryState mLibraryState;
Telegram::LastRetryType mLastRetryType;
bool mSlept;
int initTimeout;
int initTimerId;
QString configPath;
QString phoneNumber;
QString publicKeyFile;
Settings *mSettings;
CryptoUtils *mCrypto;
DcProvider *mDcProvider;
FileHandler::Ptr mFileHandler;
QString m_phoneCodeHash;
// cached contacts
QList<Contact> m_cachedContacts;
QList<User> m_cachedUsers;
QHash<qint64, int> pendingForwards;
QHash<qint64, int> pendingMediaSends;
// encrypted chats
SecretState mSecretState;
Encrypter *mEncrypter;
Decrypter *mDecrypter;
QHash<qint64, TelegramCore::Callback<EncryptedChat> > secretChatCallbacks;
bool mLoggedIn;
bool mCreatedSharedKeys;
//info for retries
QString mLastPhoneChecked;
QString mLastLangCode;
QList<InputContact> mLastContacts;
QString appHash;
qint32 appId;
QString defaultHostAddress;
qint16 defaultHostPort;
qint16 defaultHostDcId;
};
Telegram::Telegram(const QString &defaultHostAddress, qint16 defaultHostPort, qint16 defaultHostDcId, qint32 appId, const QString &appHash, const QString &phoneNumber, const QString &configPath, const QString &publicKeyFile) :
TelegramCore()
{
// Qt5.2 doesn't support .ini files to control logging, so use this
// manual workaround instead.
// http://blog.qt.io/blog/2014/03/11/qt-weekly-1-categorized-logging/
QLoggingCategory::setFilterRules(QString(qgetenv("QT_LOGGING_RULES")));
prv = new TelegramPrivate;
prv->initTimeout = 0;
prv->initTimerId = 0;
prv->configPath = configPath;
prv->phoneNumber = phoneNumber;
prv->publicKeyFile = publicKeyFile;
prv->appHash = appHash;
prv->appId = appId;
prv->defaultHostAddress = defaultHostAddress;
prv->defaultHostPort = defaultHostPort;
prv->defaultHostDcId = defaultHostDcId;
prv->mEncrypter = 0;
prv->mDecrypter = 0;
prv->mDcProvider = 0;
prv->mCrypto = 0;
prv->mSettings = 0;
}
bool Telegram::sleep() {
// sleep only if not slept and library already logged in. Returns true if sleep operations completes
if (!prv->mSlept && prv->mLibraryState >= LoggedIn) {
if (mApi && mApi->mainSession()) {
mApi->mainSession()->close();
}
prv->mSlept = true;
return true;
}
return false;
}
bool Telegram::wake() {
// wake only if slept and library already logged in. Returns true if wake operation completes
if (prv->mSlept && prv->mDcProvider && prv->mLibraryState >= LoggedIn) {
CHECK_API;
connect(mApi, SIGNAL(mainSessionReady()), this, SIGNAL(woken()), Qt::UniqueConnection);
DC *dc = prv->mDcProvider->getWorkingDc();
mApi->createMainSessionToDc(dc);
prv->mSlept = false;
return true;
}
return false;
}
bool Telegram::isSlept() const
{
return prv->mSlept;
}
void Telegram::setPhoneNumber(const QString &phoneNumber) {
if (!prv->mSettings->loadSettings(phoneNumber)) {
throw std::runtime_error("setPhoneNumber: could not load settings");
}
prv->mSecretState.load();
prv->phoneNumber = phoneNumber;
}
void Telegram::init() {
init(timeOut());
}
void Telegram::init(qint32 timeout) {
// check the auth values stored in settings, check the available DCs config data if there is
// connection to servers, and emit signals depending on user authenticated or not.
if(mApi)
return;
if(prv->mEncrypter) delete prv->mEncrypter;
if(prv->mDecrypter) delete prv->mDecrypter;
if(prv->mDcProvider) delete prv->mDcProvider;
if(prv->mCrypto) delete prv->mCrypto;
if(prv->mSettings) delete prv->mSettings;
prv->mSettings = new Settings();
prv->mSettings->setAppHash(prv->appHash);
prv->mSettings->setAppId(prv->appId);
prv->mSettings->setDefaultHostAddress(prv->defaultHostAddress);
prv->mSettings->setDefaultHostDcId(prv->defaultHostDcId);
prv->mSettings->setDefaultHostPort(prv->defaultHostPort);
// load settings
if (!prv->mSettings->loadSettings(prv->phoneNumber, prv->configPath, prv->publicKeyFile)) {
throw std::runtime_error("loadSettings failure");
}
prv->mCrypto = new CryptoUtils(prv->mSettings);
prv->mDcProvider = new DcProvider(prv->mSettings, prv->mCrypto);
prv->mDcProvider->setParent(this);
connect(prv->mDcProvider, &DcProvider::fatalError, this, &Telegram::fatalError);
// activate dc provider ready signal
connect(prv->mDcProvider, &DcProvider::dcProviderReady, this, &Telegram::onDcProviderReady);
// activate rest of dc provider signal connections
connect(prv->mDcProvider, &DcProvider::authNeeded, this, &Telegram::authNeeded);
connect(prv->mDcProvider, &DcProvider::authTransferCompleted, this, &Telegram::onAuthLoggedIn);
prv->mSecretState = SecretState(prv->mSettings);
prv->mSecretState.load();
prv->mEncrypter = new Encrypter(prv->mSettings);
prv->mDecrypter = new Decrypter(prv->mSettings);
connect(prv->mDecrypter, &Decrypter::sequenceNumberGap,
this, &Telegram::onSequenceNumberGap);
prv->mDcProvider->initialize();
prv->initTimeout = timeout;
prv->initTimerId = startTimer(prv->initTimeout);
}
Telegram::~Telegram()
{
prv->mSecretState.save();
if(prv->mEncrypter)
delete prv->mEncrypter;
if(prv->mDecrypter)
delete prv->mDecrypter;
if(prv->mDcProvider)
delete prv->mDcProvider;
if(prv->mCrypto)
delete prv->mCrypto;
if(prv->mSettings)
delete prv->mSettings;
delete prv;
}
QString Telegram::defaultHostAddress()
{
return prv->mSettings->defaultHostAddress();
}
qint16 Telegram::defaultHostPort()
{
return prv->mSettings->defaultHostPort();
}
qint16 Telegram::defaultHostDcId()
{
return prv->mSettings->defaultHostDcId();
}
qint32 Telegram::appId()
{
return prv->mSettings->appId();
}
QString Telegram::appHash()
{
return prv->mSettings->appHash();
}
Settings *Telegram::settings() const
{
return prv->mSettings;
}
CryptoUtils *Telegram::crypto() const
{
return prv->mCrypto;
}
void Telegram::setDefaultSettingsFormat(const QSettings::Format &format)
{
qtelegram_default_settings_format = format;
}
QSettings::Format Telegram::defaultSettingsFormat()
{
return qtelegram_default_settings_format;
}
bool Telegram::isConnected() {
if (mApi && mApi->mainSession()) {
return mApi->mainSession()->state() == QAbstractSocket::ConnectedState;
}
return false;
}
bool Telegram::isLoggedIn() {
return prv->mLibraryState == LoggedIn;
}
void Telegram::onAuthLoggedIn() {
prv->mLibraryState = LoggedIn;
Q_EMIT authLoggedIn();
}
void Telegram::onAuthLogOutAnswer(qint64 id, bool result, const QVariant &attachedData) {
prv->mDcProvider->logOut();
prv->mLibraryState = LoggedOut;
TelegramCore::onAuthLogOutAnswer(id, result, attachedData);
}
qint32 Telegram::ourId() {
return prv->mSettings->ourId();
}
void Telegram::onDcProviderReady() {
prv->mLibraryState = CreatedSharedKeys;
setApi( prv->mDcProvider->getApi() );
// secret chats
connect(mApi, &TelegramApi::messagesRequestEncryptionAnswer, this, &Telegram::onMessagesRequestEncryptionEncryptedChat);
connect(mApi, &TelegramApi::messagesAcceptEncryptionAnswer, this, &Telegram::onMessagesAcceptEncryptionEncryptedChat);
connect(mApi, &TelegramApi::messagesReadEncryptedHistoryAnswer, this, &Telegram::messagesReadEncryptedHistoryAnswer);
connect(mApi, &TelegramApi::messagesSendEncryptedAnswer, this, &Telegram::messagesSendEncryptedAnswer);
connect(mApi, &TelegramApi::messagesSendEncryptedFileAnswer, this, &Telegram::messagesSendEncryptedFileAnswer);
connect(mApi, &TelegramApi::messagesSendEncryptedServiceAnswer, this, &Telegram::messagesSendEncryptedServiceAnswer);
// updates
connect(mApi, &TelegramApi::error, this, &Telegram::onError);
connect(mApi, &TelegramApi::fatalError, this, &Telegram::fatalError);
connect(mApi, &TelegramApi::updates, this, &Telegram::updates);
connect(mApi, &TelegramApi::updatesCombined, this, &Telegram::updatesCombined);
connect(mApi, &TelegramApi::updates, this, &Telegram::onUpdates);
connect(mApi, &TelegramApi::updatesCombined, this, &Telegram::onUpdates);
connect(mApi, &TelegramApi::updateShort, this, &Telegram::updateShort);
connect(mApi, &TelegramApi::updateShort, this, &Telegram::onUpdateShort);
connect(mApi, &TelegramApi::updateShortChatMessage, this, &Telegram::updateShortChatMessage);
connect(mApi, &TelegramApi::updateShortMessage, this, &Telegram::updateShortMessage);
connect(mApi, &TelegramApi::updatesTooLong, this, &Telegram::updatesTooLong);
connect(mApi, SIGNAL(updatesGetStateAnswer(qint64, const UpdatesState&, const QVariant)), this, SIGNAL(updatesGetStateAnswer(qint64, const UpdatesState&)));
// logic additional signal slots
connect(mApi, SIGNAL(mainSessionDcChanged(DC*)), this, SLOT(onAuthCheckPhoneDcChanged()));
connect(mApi, SIGNAL(mainSessionDcChanged(DC*)), this, SLOT(onHelpGetInviteTextDcChanged()));
connect(mApi, SIGNAL(mainSessionDcChanged(DC*)), this, SLOT(onImportContactsDcChanged()));
connect(mApi, &TelegramApi::mainSessionReady, this, &Telegram::connected);
connect(mApi, &TelegramApi::mainSessionClosed, this, &Telegram::disconnected);
prv->mFileHandler = FileHandler::Ptr(new FileHandler(this, mApi, prv->mCrypto, prv->mSettings, *prv->mDcProvider, prv->mSecretState));
connect(prv->mFileHandler.data(), &FileHandler::uploadSendFileAnswer, this, &Telegram::uploadSendFileAnswer);
connect(prv->mFileHandler.data(), &FileHandler::uploadGetFileAnswer, this, &Telegram::uploadGetFileAnswer);
connect(prv->mFileHandler.data(), &FileHandler::uploadCancelFileAnswer, this, &Telegram::uploadCancelFileAnswer);
connect(prv->mFileHandler.data(), &FileHandler::error, this, &Telegram::error);
connect(prv->mFileHandler.data(), &FileHandler::messagesSentMedia, this, &Telegram::onMessagesSendMediaAnswer);
connect(prv->mFileHandler.data(), &FileHandler::messagesSendEncryptedFileAnswer, this, &Telegram::messagesSendEncryptedFileAnswer);
// At this point we should test the main session state and emit by hand signals of connected/disconnected
// depending on the connection state of the session. This is so because first main session connection, if done,
// is performed before we could connect the signal-slots to advise about it;
if (mApi->mainSession()->state() == QAbstractSocket::ConnectedState) {
Q_EMIT connected();
} else {
Q_EMIT disconnected();
}
}
qint64 Telegram::messagesCreateEncryptedChat(const InputUser &user) {
qCDebug(TG_LIB_SECRET) << "creating new encrypted chat";
// generate a new object where store all the needed secret chat data
SecretChat *secretChat = new SecretChat(prv->mSettings);
secretChat->setAdminId(prv->mSettings->ourId());
secretChat->setParticipantId(user.userId());
secretChat->setRequestedUser(user);
return generateGAorB(secretChat);
}
qint64 Telegram::messagesAcceptEncryptedChat(qint32 chatId) {
qCDebug(TG_LIB_SECRET) << "accepting requested encrypted chat with id" << chatId;
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "Not found any chat related to" << chatId;
return -1;
}
return generateGAorB(secretChat);
}
qint64 Telegram::messagesDiscardEncryptedChat(qint32 chatId) {
CHECK_API;
qCDebug(TG_LIB_SECRET) << "discarding encrypted chat with id" << chatId;
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "Trying to discard a not existant chat";
Q_EMIT messagesEncryptedChatDiscarded(chatId);
return -1;
}
TelegramCore::CallbackError error;
TelegramCore::Callback<bool> callback = [this, secretChat](TG_MESSAGES_DISCARD_ENCRYPTION_CALLBACK) mutable {
qint32 chatId = secretChat->chatId();
prv->mSecretState.chats().remove(chatId);
prv->mSecretState.save();
qCDebug(TG_LIB_SECRET) << "Discarded secret chat" << chatId;
delete secretChat;
secretChat = 0;
Q_EMIT messagesEncryptedChatDiscarded(chatId);
};
return messagesDiscardEncryption(chatId, callback);
}
qint64 Telegram::messagesSetEncryptedTTL(qint64 randomId, qint32 chatId, qint32 ttl) {
CHECK_API;
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "Could not set secret chat TTL, chat not found.";
return -1;
}
DecryptedMessageAction action(DecryptedMessageAction::typeDecryptedMessageActionSetMessageTTLSecret8);
action.setTtlSeconds(ttl);
DecryptedMessage decryptedMessage(DecryptedMessage::typeDecryptedMessageServiceSecret17);
decryptedMessage.setRandomId(randomId);
decryptedMessage.setAction(action);
prv->mEncrypter->setSecretChat(secretChat);
QByteArray data = prv->mEncrypter->generateEncryptedData(decryptedMessage);
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(chatId);
inputEncryptedChat.setAccessHash(secretChat->accessHash());
qint64 requestId = mApi->messagesSendEncrypted(inputEncryptedChat, randomId, data);
secretChat->increaseOutSeqNo();
secretChat->appendToSequence(randomId);
prv->mSecretState.save();
return requestId;
}
qint64 Telegram::messagesReadEncryptedHistory(qint32 chatId, qint32 maxDate) {
CHECK_API;
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "Could not read history of a not yet existant chat";
return -1;
}
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(chatId);
inputEncryptedChat.setAccessHash(secretChat->accessHash());
return mApi->messagesReadEncryptedHistory(inputEncryptedChat, maxDate);
}
qint64 Telegram::messagesSendEncrypted(qint32 chatId, qint64 randomId, qint32 ttl, const QString &text) {
CHECK_API;
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "Could not find any related secret chat to send the message";
return -1;
}
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(secretChat->chatId());
inputEncryptedChat.setAccessHash(secretChat->accessHash());
DecryptedMessage decryptedMessage(DecryptedMessage::typeDecryptedMessageSecret17);
decryptedMessage.setRandomId(randomId);
decryptedMessage.setTtl(ttl);
decryptedMessage.setMessage(text);
prv->mEncrypter->setSecretChat(secretChat);
QByteArray data = prv->mEncrypter->generateEncryptedData(decryptedMessage);
qint64 request = mApi->messagesSendEncrypted(inputEncryptedChat, randomId, data);
secretChat->increaseOutSeqNo();
secretChat->appendToSequence(randomId);
prv->mSecretState.save();
return request;
}
void Telegram::onSequenceNumberGap(qint32 chatId, qint32 startSeqNo, qint32 endSeqNo) {
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
ASSERT(secretChat);
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(secretChat->chatId());
inputEncryptedChat.setAccessHash(secretChat->accessHash());
qint64 randomId;
Utils::randomBytes(&randomId, 8);
DecryptedMessage decryptedMessage(DecryptedMessage::typeDecryptedMessageServiceSecret17);
decryptedMessage.setRandomId(randomId);
DecryptedMessageAction action(DecryptedMessageAction::typeDecryptedMessageActionResendSecret17);
action.setStartSeqNo(startSeqNo);
action.setEndSeqNo(endSeqNo);
decryptedMessage.setAction(action);
prv->mEncrypter->setSecretChat(secretChat);
QByteArray data = prv->mEncrypter->generateEncryptedData(decryptedMessage);
mApi->messagesSendEncrypted(inputEncryptedChat, randomId, data);
secretChat->increaseOutSeqNo();
secretChat->appendToSequence(randomId);
prv->mSecretState.save();
}
qint64 Telegram::messagesSendEncryptedPhoto(qint32 chatId, qint64 randomId, qint32 ttl, const QString &filePath) {
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "Could not find any related secret chat to send the photo";
return -1;
}
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(secretChat->chatId());
inputEncryptedChat.setAccessHash(secretChat->accessHash());
FileOperation *op = new FileOperation(FileOperation::sendEncryptedFile);
op->setInputEncryptedChat(inputEncryptedChat);
op->setRandomId(randomId);
op->initializeKeyAndIv();
QByteArray key = op->key();
QByteArray iv = op->iv();
QFileInfo fileInfo(filePath);
qint32 size = fileInfo.size();
QImage image;
image.load(filePath);
qint32 width = image.width();
qint32 height = image.height();
DecryptedMessage decryptedMessage(DecryptedMessage::typeDecryptedMessageSecret17);
decryptedMessage.setRandomId(randomId);
decryptedMessage.setTtl(ttl);
DecryptedMessageMedia media(DecryptedMessageMedia::typeDecryptedMessageMediaPhotoSecret8);
media.setThumbBytes(QByteArray());
media.setW(width);
media.setH(height);
media.setSize(size);
media.setKey(key);
media.setIv(iv);
decryptedMessage.setMedia(media);
op->setDecryptedMessage(decryptedMessage);
return prv->mFileHandler->uploadSendFile(*op, filePath);
}
qint64 Telegram::messagesSendEncryptedVideo(qint32 chatId, qint64 randomId, qint32 ttl, const QString &filePath, qint32 duration, qint32 width, qint32 height, const QByteArray &thumbnailBytes) {
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "Could not find any related secret chat to send the video";
return -1;
}
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(secretChat->chatId());
inputEncryptedChat.setAccessHash(secretChat->accessHash());
FileOperation *op = new FileOperation(FileOperation::sendEncryptedFile);
op->setInputEncryptedChat(inputEncryptedChat);
op->setRandomId(randomId);
op->initializeKeyAndIv();
QByteArray key = op->key();
QByteArray iv = op->iv();
QFileInfo fileInfo(filePath);
qint32 size = fileInfo.size();
QString mimeType = QMimeDatabase().mimeTypeForFile(QFileInfo(filePath)).name();
DecryptedMessage decryptedMessage(DecryptedMessage::typeDecryptedMessageSecret17);
decryptedMessage.setRandomId(randomId);
decryptedMessage.setTtl(ttl);
DecryptedMessageMedia media(DecryptedMessageMedia::typeDecryptedMessageMediaVideoSecret17);
media.setDuration(duration);
media.setMimeType(mimeType);
media.setW(width);
media.setH(height);
media.setSize(size);
media.setKey(key);
media.setIv(iv);
media.setThumbBytes(thumbnailBytes);
decryptedMessage.setMedia(media);
op->setDecryptedMessage(decryptedMessage);
return prv->mFileHandler->uploadSendFile(*op, filePath);
}
qint64 Telegram::messagesSendEncryptedDocument(qint32 chatId, qint64 randomId, qint32 ttl, const QString &filePath) {
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "Could not find any related secret chat to send the document";
return -1;
}
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(secretChat->chatId());
inputEncryptedChat.setAccessHash(secretChat->accessHash());
FileOperation *op = new FileOperation(FileOperation::sendEncryptedFile);
op->setInputEncryptedChat(inputEncryptedChat);
op->setRandomId(randomId);
op->initializeKeyAndIv();
QByteArray key = op->key();
QByteArray iv = op->iv();
QFileInfo fileInfo(filePath);
qint32 size = fileInfo.size();
QString fileName = fileInfo.fileName();
QString mimeType = QMimeDatabase().mimeTypeForFile(filePath).name();
DecryptedMessage decryptedMessage(DecryptedMessage::typeDecryptedMessageSecret17);
decryptedMessage.setRandomId(randomId);
decryptedMessage.setTtl(ttl);
DecryptedMessageMedia media(DecryptedMessageMedia::typeDecryptedMessageMediaDocumentSecret8);
media.setThumbBytes(QByteArray());
media.setFileName(fileName);
media.setMimeType(mimeType);
media.setSize(size);
media.setKey(key);
media.setIv(iv);
decryptedMessage.setMedia(media);
op->setDecryptedMessage(decryptedMessage);
return prv->mFileHandler->uploadSendFile(*op, filePath);
}
qint64 Telegram::messagesReceivedQueue(qint32 maxQts) {
CHECK_API;
return mApi->messagesReceivedQueue(maxQts);
}
qint64 Telegram::messagesGetStickers(const QString &emoticon, const QString &hash) {
CHECK_API;
return mApi->messagesGetStickers(emoticon, hash);
}
qint64 Telegram::messagesGetAllStickers(const qint32 &hash) {
CHECK_API;
return mApi->messagesGetAllStickers(hash);
}
qint64 Telegram::messagesUninstallStickerSet(const InputStickerSet &stickerset) {
CHECK_API;
return mApi->messagesUninstallStickerSet(stickerset);
}
qint64 Telegram::messagesExportChatInvite(qint32 chatId) {
CHECK_API;
return mApi->messagesExportChatInvite(chatId);
}
qint64 Telegram::messagesCheckChatInvite(const QString &hash) {
CHECK_API;
return mApi->messagesCheckChatInvite(hash);
}
qint64 Telegram::messagesImportChatInvite(const QString &hash) {
CHECK_API;
return mApi->messagesImportChatInvite(hash);
}
qint64 Telegram::generateGAorB(SecretChat *secretChat) {
CHECK_API;
qCDebug(TG_LIB_SECRET) << "requesting for DH config parameters";
// call messages.getDhConfig to get p and g for start creating shared key
qint64 reqId = mApi->messagesGetDhConfig(prv->mSecretState.version(), DH_CONFIG_SERVER_RANDOM_LENGTH);
// store in secret chats map related to this request id, temporally
prv->mSecretState.chats().insert(reqId, secretChat);
prv->mSecretState.save();
return reqId;
}
void Telegram::onMessagesGetDhConfigAnswer(qint64 msgId, const MessagesDhConfig &result, const QVariant &attachedData) {
if (result.classType() == MessagesDhConfig::MessagesDhConfigClassType::typeMessagesDhConfigNotModified)
{
onMessagesDhConfigNotModified(msgId, result.random());
return;
}
qCDebug(TG_LIB_SECRET) << "received new DH parameters g ="<< result.g() << ",p =" << result.p().toBase64()
<< ",version =" << result.version();
prv->mSecretState.setVersion(result.version());
prv->mSecretState.setG(result.g());
prv->mSecretState.setP(result.p());
if (prv->mCrypto->checkDHParams(prv->mSecretState.p(), result.g()) < 0 &&
result.classType() == MessagesDhConfig::typeMessagesDhConfig) {
qCCritical(TG_TELEGRAM) << "Diffie-Hellman config parameters are not valid";
} else {
onMessagesDhConfigNotModified(msgId, result.random());
}
}
void Telegram::onMessagesDhConfigNotModified(qint64 msgId, const QByteArray &random) {
qCDebug(TG_LIB_SECRET) << "processing DH parameters";
SecretChat *secretChat = prv->mSecretState.chats().take(msgId);
prv->mSecretState.save();
ASSERT(secretChat);
// create secret a number by taking server random (and generating a client random also to have more entrophy)
secretChat->createMyKey(random);
// create empty bignum where store the result of operation g^a mod p
BIGNUM *r = BN_new();
Utils::ensurePtr(r);
// do the opeation -> r = g^a mod p
Utils::ensure(prv->mCrypto->BNModExp(r, prv->mSecretState.g(), secretChat->myKey(), prv->mSecretState.p()));
// check that g and r are greater than one and smaller than p-1. Also checking that r is between 2^{2048-64} and p - 2^{2048-64}
if (prv->mCrypto->checkCalculatedParams(r, prv->mSecretState.g(), prv->mSecretState.p()) < 0) {
qCCritical(TG_LIB_SECRET) << "gAOrB or g params are not valid";
return;
}
// convert result to big endian before sending request encryption query
uchar rawGAOrB[256];
memset(rawGAOrB, 0, 256);
BN_bn2bin(r, rawGAOrB);
QByteArray gAOrB = QByteArray::fromRawData(reinterpret_cast<char*>(rawGAOrB), 256);
switch (static_cast<qint32>(secretChat->state())) {
case SecretChat::Init: {
// generate randomId, used not only to request encryption but as chatId
qint32 randomId;
Utils::randomBytes(&randomId, 4);
secretChat->setChatId(randomId);
prv->mSecretState.chats().insert(randomId, secretChat);
prv->mSecretState.save();
qCDebug(TG_LIB_SECRET) << "Requesting encryption for chatId" << secretChat->chatId();
mApi->messagesRequestEncryption(secretChat->requestedUser(), randomId, gAOrB);
break;
}
case SecretChat::Requested: {
QByteArray gA = secretChat->gAOrB();
createSharedKey(secretChat, prv->mSecretState.p(), gA);
qint64 keyFingerprint = secretChat->keyFingerprint();
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(secretChat->chatId());
inputEncryptedChat.setAccessHash(secretChat->accessHash());
qCDebug(TG_LIB_SECRET) << "Accepting encryption for chatId" << secretChat->chatId();
mApi->messagesAcceptEncryption(inputEncryptedChat, gAOrB, keyFingerprint);
break;
}
default:
Q_ASSERT("Not handled");
break;
}
BN_free(r);
prv->mSecretState.save();
}
void Telegram::onMessagesRequestEncryptionEncryptedChat(qint64, const EncryptedChat &chat) {
Q_EMIT messagesCreateEncryptedChatAnswer(chat.id(), chat.date(), chat.participantId(), chat.accessHash());
}
void Telegram::onMessagesAcceptEncryptionEncryptedChat(qint64, const EncryptedChat &chat) {
qCDebug(TG_LIB_SECRET) << "Joined to secret chat" << chat.id() << "with peer" << chat.adminId();
SecretChat *secretChat = prv->mSecretState.chats().value(chat.id());
secretChat->setState(SecretChat::Accepted);
prv->mSecretState.save();
Q_EMIT messagesEncryptedChatCreated(chat.id(), chat.date(), chat.adminId(), chat.accessHash());
//notify peer about our layer
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(chat.id());
inputEncryptedChat.setAccessHash(secretChat->accessHash());
prv->mEncrypter->setSecretChat(secretChat);
qint64 randomId;
Utils::randomBytes(&randomId, 8);
DecryptedMessage decryptedMessage(DecryptedMessage::typeDecryptedMessageServiceSecret17);
decryptedMessage.setRandomId(randomId);
DecryptedMessageAction action(DecryptedMessageAction::typeDecryptedMessageActionNotifyLayerSecret17);
action.setLayer(CoreTypes::typeLayerVersion);
decryptedMessage.setAction(action);
QByteArray data = prv->mEncrypter->generateEncryptedData(decryptedMessage);
mApi->messagesSendEncryptedService(inputEncryptedChat, randomId, data);
secretChat->increaseOutSeqNo();
secretChat->appendToSequence(randomId);
prv->mSecretState.save();
qCDebug(TG_LIB_SECRET) << "Notified our layer:" << CoreTypes::typeLayerVersion;
}
void Telegram::onUpdateShort(const Update &update) {
processSecretChatUpdate(update);
}
void Telegram::onUpdates(const QList<Update> &udts) {
Q_FOREACH (const Update &update, udts) {
processSecretChatUpdate(update);
}
}
void Telegram::timerEvent(QTimerEvent *e)
{
if(e->timerId() == prv->initTimerId)
{
killTimer(prv->initTimerId);
prv->initTimerId = 0;
if(!mApi)
{
qWarning() << "Timeout error initializing. Retrying...";
if(prv->initTimeout <= 30000)
prv->initTimeout *= 2;
init(prv->initTimeout);
}
}
else
QObject::timerEvent(e);
}
SecretChatMessage Telegram::toSecretChatMessage(const EncryptedMessage &encrypted) {
SecretChatMessage secretChatMessage;
qint32 chatId = encrypted.chatId();
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "received encrypted message does not belong to any known secret chat";
return secretChatMessage;
}
secretChatMessage.setChatId(chatId);
secretChatMessage.setDate(encrypted.date());
prv->mDecrypter->setSecretChat(secretChat);
DecryptedMessage decrypted = prv->mDecrypter->decryptEncryptedData(encrypted.randomId(), encrypted.bytes());
secretChatMessage.setDecryptedMessage(decrypted);
// if having a not 0 randomId, the decrypted message is valid
if (decrypted.randomId()) {
EncryptedFile attachment = encrypted.file();
//if attachment, check keyFingerprint
if (attachment.classType() != EncryptedFile::typeEncryptedFileEmpty) {
qint32 receivedKeyFingerprint = attachment.keyFingerprint();
const QByteArray &key = decrypted.media().key();
const QByteArray &iv = decrypted.media().iv();
qint32 computedKeyFingerprint = prv->mCrypto->computeKeyFingerprint(key, iv);
qCDebug(TG_LIB_SECRET) << "received keyFingerprint:" << receivedKeyFingerprint;
qCDebug(TG_LIB_SECRET) << "computed keyFingerprint:" << computedKeyFingerprint;
if (receivedKeyFingerprint != computedKeyFingerprint) {
qCWarning(TG_LIB_SECRET) << "Computed and received key fingerprints are not equals. Discarding message";
return secretChatMessage;
}
secretChatMessage.setAttachment(attachment);
}
prv->mSecretState.save();
}
return secretChatMessage;
}
void Telegram::processSecretChatUpdate(const Update &update) {
switch (static_cast<qint32>(update.classType())) {
case Update::typeUpdateNewEncryptedMessage: {
EncryptedMessage encrypted = update.messageEncrypted();
SecretChatMessage secretChatMessage = toSecretChatMessage(encrypted);
// if having a not 0 randomId, the decrypted message is valid
if (secretChatMessage.decryptedMessage().randomId()) {
prv->mSecretState.save();
qint32 qts = update.qts();
Q_EMIT updateSecretChatMessage(secretChatMessage, qts);
}
break;
}
case Update::typeUpdateEncryption: {
const EncryptedChat &encryptedChat = update.chat();
qint32 chatId = encryptedChat.id();
switch (static_cast<qint32>(encryptedChat.classType())) {
case EncryptedChat::typeEncryptedChatRequested: {
// here, we have received a request of creating a new secret chat. Emit a signal
// with chat details for user B to accept or reject chat creation
qint64 accessHash = encryptedChat.accessHash();
qint32 date = encryptedChat.date();
qint32 adminId = encryptedChat.adminId();
qint32 participantId = encryptedChat.participantId();
QByteArray gA = encryptedChat.gA();
qCDebug(TG_LIB_SECRET) << "Requested secret chat creation:";
qCDebug(TG_LIB_SECRET) << "chatId:" << chatId;
qCDebug(TG_LIB_SECRET) << "date:" << date;
qCDebug(TG_LIB_SECRET) << "adminId:" << adminId;
qCDebug(TG_LIB_SECRET) << "participantId:" << participantId;
qCDebug(TG_LIB_SECRET) << "gA:" << gA.toBase64();
qCDebug(TG_LIB_SECRET) << "ourId:" << ourId();
ASSERT(participantId == ourId());
SecretChat* secretChat = new SecretChat(prv->mSettings);
secretChat->setChatId(encryptedChat.id());
secretChat->setAccessHash(encryptedChat.accessHash());
secretChat->setDate(encryptedChat.date());
secretChat->setAdminId(encryptedChat.adminId());
secretChat->setParticipantId(encryptedChat.participantId());
secretChat->setGAOrB(gA);
secretChat->setState(SecretChat::Requested);
prv->mSecretState.chats().insert(chatId, secretChat);
prv->mSecretState.save();
Q_EMIT messagesEncryptedChatRequested(chatId, date, adminId, accessHash);
break;
}
case EncryptedChat::typeEncryptedChat: {
qCDebug(TG_LIB_SECRET) << "received encrypted chat creation update";
// here, the request for encryption has been accepted. Take the secret chat data
qint64 accessHash = encryptedChat.accessHash();
qint32 date = encryptedChat.date();
qint32 adminId = encryptedChat.adminId();
qint32 participantId = encryptedChat.participantId();
QByteArray gB = encryptedChat.gAOrB();
qint64 keyFingerprint = encryptedChat.keyFingerprint();
qCDebug(TG_LIB_SECRET) << "Peer accepted secret chat creation:";
qCDebug(TG_LIB_SECRET) << "chatId:" << chatId;
qCDebug(TG_LIB_SECRET) << "accessHash:" << accessHash;
qCDebug(TG_LIB_SECRET) << "date:" << date;
qCDebug(TG_LIB_SECRET) << "adminId:" << adminId;
qCDebug(TG_LIB_SECRET) << "participantId:" << participantId;
qCDebug(TG_LIB_SECRET) << "gB:" << gB.toBase64();
qCDebug(TG_LIB_SECRET) << "received keyFingerprint:" << keyFingerprint;
SecretChat *secretChat = prv->mSecretState.chats().value(chatId);
if (!secretChat) {
qCWarning(TG_LIB_SECRET) << "Could not find secret chat with id" << chatId;
return;
}
createSharedKey(secretChat, prv->mSecretState.p(), gB);
qint64 calculatedKeyFingerprint = secretChat->keyFingerprint();
qCDebug(TG_LIB_SECRET) << "calculated keyFingerprint:" << calculatedKeyFingerprint;
if (calculatedKeyFingerprint == keyFingerprint) {
qCDebug(TG_LIB_SECRET) << "Generated shared key for secret chat" << chatId;
secretChat->setChatId(chatId);
secretChat->setAccessHash(accessHash);
secretChat->setDate(date);
secretChat->setAdminId(adminId);
secretChat->setParticipantId(participantId);
secretChat->setState(SecretChat::Accepted);
qCDebug(TG_LIB_SECRET) << "Joined to secret chat" << chatId << "with peer" << participantId;
prv->mSecretState.save();
Q_EMIT messagesEncryptedChatCreated(chatId, date, participantId, accessHash);
//notify peer about our layer
InputEncryptedChat inputEncryptedChat;
inputEncryptedChat.setChatId(chatId);
inputEncryptedChat.setAccessHash(accessHash);
prv->mEncrypter->setSecretChat(secretChat);
qint64 randomId;
Utils::randomBytes(&randomId, 8);
DecryptedMessage decryptedMessage(DecryptedMessage::typeDecryptedMessageServiceSecret17);
decryptedMessage.setRandomId(randomId);
DecryptedMessageAction action(DecryptedMessageAction::typeDecryptedMessageActionNotifyLayerSecret17);
action.setLayer(CoreTypes::typeLayerVersion);
decryptedMessage.setAction(action);
QByteArray data = prv->mEncrypter->generateEncryptedData(decryptedMessage);
mApi->messagesSendEncryptedService(inputEncryptedChat, randomId, data);