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squawk/core/handlers/omemohandler.cpp

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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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/>.
*/
#include <QDebug>
#include "omemohandler.h"
#include "core/account.h"
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#include "core/adapterfunctions.h"
Core::OmemoHandler::OmemoHandler(Account* account) :
QObject(),
QXmppOmemoStorage(),
acc(account),
ownDevice(std::nullopt),
db(acc->getName() + "/omemo"),
meta(db.addCache<QString, QVariant>("meta")),
devices(db.addCache<QString, QHash<uint32_t, Device>>("devices")),
preKeyPairs(db.addCache<uint32_t, QByteArray>("preKeyPairs")),
signedPreKeyPairs(db.addCache<uint32_t, SignedPreKeyPair>("signedPreKeyPairs"))
{
db.open();
try {
QVariant own = meta->getRecord("ownDevice");
ownDevice = own.value<OwnDevice>();
qDebug() << "Successfully found own device omemo data for account" << acc->getName();
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} catch (const LMDBAL::NotFound& e) {
qDebug() << "No device omemo data was found for account" << acc->getName();
}
}
Core::OmemoHandler::~OmemoHandler() {
db.close();
}
bool Core::OmemoHandler::hasOwnDevice() {
return ownDevice.has_value();
}
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QXmppTask<QXmppOmemoStorage::OmemoData> Core::OmemoHandler::allData() {
OmemoData data;
data.ownDevice = ownDevice;
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LMDBAL::Transaction txn = db.beginReadOnlyTransaction();
std::map<uint32_t, QByteArray> pkeys = preKeyPairs->readAll(txn);
for (const std::pair<const uint32_t, QByteArray>& pair : pkeys)
data.preKeyPairs.insert(pair.first, pair.second);
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std::map<uint32_t, SignedPreKeyPair> spre = signedPreKeyPairs->readAll(txn);
for (const std::pair<const uint32_t, SignedPreKeyPair>& pair : spre) {
QXmppOmemoStorage::SignedPreKeyPair qxpair = {pair.second.first, pair.second.second};
data.signedPreKeyPairs.insert(pair.first, qxpair);
}
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std::map<QString, QHash<uint32_t, Device>> devs = devices->readAll(txn);
for (const std::pair<const QString, QHash<uint32_t, Device>>& pair : devs)
data.devices.insert(pair.first, pair.second);
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return Core::makeReadyTask(std::move(data));
}
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QXmppTask<void> Core::OmemoHandler::addDevice(const QString& jid, uint32_t deviceId, const QXmppOmemoStorage::Device& device) {
QHash<uint32_t, Device> devs;
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LMDBAL::WriteTransaction txn = db.beginTransaction();
bool had = true;
try {
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devices->getRecord(jid, devs, txn);
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} catch (const LMDBAL::NotFound& error) {
had = false;
}
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devs.insert(deviceId, device); //overwrites
if (had)
devices->changeRecord(jid, devs, txn);
else
devices->addRecord(jid, devs, txn);
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txn.commit();
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::OmemoHandler::addPreKeyPairs(const QHash<uint32_t, QByteArray>& keyPairs) {
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LMDBAL::WriteTransaction txn = db.beginTransaction();
for (QHash<uint32_t, QByteArray>::const_iterator itr = keyPairs.begin(), end = keyPairs.end(); itr != end; ++itr)
preKeyPairs->forceRecord(itr.key(), itr.value(), txn);
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txn.commit();
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::OmemoHandler::addSignedPreKeyPair(uint32_t keyId, const QXmppOmemoStorage::SignedPreKeyPair& keyPair) {
signedPreKeyPairs->forceRecord(keyId, std::make_pair(keyPair.creationDate, keyPair.data));
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::OmemoHandler::removeDevice(const QString& jid, uint32_t deviceId) {
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LMDBAL::WriteTransaction txn = db.beginTransaction();
QHash<uint32_t, Device> devs = devices->getRecord(jid, txn);
devs.remove(deviceId);
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if (devs.isEmpty())
devices->removeRecord(jid, txn);
else
devices->changeRecord(jid, devs, txn);
txn.commit();
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::OmemoHandler::removeDevices(const QString& jid) {
devices->removeRecord(jid);
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::OmemoHandler::removePreKeyPair(uint32_t keyId) {
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try {
preKeyPairs->removeRecord(keyId);
} catch (const LMDBAL::NotFound& e) {
qDebug() << "Couldn't remove preKeyPair " << e.what();
}
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::OmemoHandler::removeSignedPreKeyPair(uint32_t keyId) {
try {
signedPreKeyPairs->removeRecord(keyId);
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} catch (const LMDBAL::NotFound& e) {}
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::OmemoHandler::setOwnDevice(const std::optional<OwnDevice>& device) {
bool had = ownDevice.has_value();
ownDevice = device;
if (ownDevice.has_value()) {
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if (had)
meta->changeRecord("ownDevice", QVariant::fromValue(ownDevice.value()));
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else
meta->addRecord("ownDevice", QVariant::fromValue(ownDevice.value()));
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} else if (had) {
meta->removeRecord("ownDevice");
}
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::OmemoHandler::resetAll() {
ownDevice = std::nullopt;
db.drop();
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return Core::makeReadyTask();
}
void Core::OmemoHandler::getDevices(const QString& jid, std::list<Shared::KeyInfo>& out) const {
QHash<uint32_t, Device> devs;
try {
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devices->getRecord(jid, devs);
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} catch (const LMDBAL::NotFound& error) {}
for (QHash<uint32_t, Device>::const_iterator itr = devs.begin(), end = devs.end(); itr != end; ++itr) {
const Device& dev = itr.value();
out.emplace_back(
itr.key(),
dev.keyId,
dev.label,
dev.removalFromDeviceListDate,
Shared::TrustLevel::undecided,
Shared::EncryptionProtocol::omemo2,
false
);
}
}
void Core::OmemoHandler::requestBundles(const QString& jid) {
QXmppTask<void> task = acc->om->buildMissingSessions({jid});
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Contact* cnt = acc->rh->getContact(jid);
if (cnt)
cnt->omemoBundles = Shared::Possible::discovering;
task.then(this, std::bind(&OmemoHandler::onBundlesReceived, this, jid));
}
void Core::OmemoHandler::requestOwnBundles() {
QXmppTask<void> task = acc->om->buildMissingSessions({acc->getBareJid()});
task.then(this, std::bind(&OmemoHandler::onOwnBundlesReceived, this));
}
void Core::OmemoHandler::onBundlesReceived(const QString& jid) {
std::list<Shared::KeyInfo> keys = readKeys(jid);
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Contact* cnt = acc->rh->getContact(jid);
if (cnt)
cnt->omemoBundles = Shared::Possible::present;
acc->delay->receivedBundles(jid, keys);
}
void Core::OmemoHandler::onOwnBundlesReceived() {
std::list<Shared::KeyInfo> keys = readKeys(acc->getBareJid());
if (ownDevice)
keys.emplace_front(
ownDevice->id,
ownDevice->publicIdentityKey,
ownDevice->label,
QDateTime::currentDateTime(),
Shared::TrustLevel::authenticated,
Shared::EncryptionProtocol::omemo2,
true
);
acc->delay->receivedOwnBundles(keys);
}
std::list<Shared::KeyInfo> Core::OmemoHandler::readKeys(const QString& jid) {
std::list<Shared::KeyInfo> keys;
getDevices(jid, keys);
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std::map<QByteArray, Shared::TrustLevel> trustLevels = acc->th->getKeys(Shared::EncryptionProtocol::omemo2, jid);
for (Shared::KeyInfo& key : keys) {
std::map<QByteArray, Shared::TrustLevel>::const_iterator itr = trustLevels.find(key.fingerPrint);
if (itr != trustLevels.end())
key.trustLevel = itr->second;
}
return keys;
}
void Core::OmemoHandler::onOmemoDeviceAdded(const QString& jid, uint32_t id) {
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SHARED_UNUSED(id);
qDebug() << "OMEMO device added for" << jid;
}
QDataStream & operator >> (QDataStream& in, QXmppOmemoStorage::Device& device) {
in >> device.label;
in >> device.keyId;
in >> device.session;
in >> device.unrespondedSentStanzasCount;
in >> device.unrespondedReceivedStanzasCount;
in >> device.removalFromDeviceListDate;
return in;
}
QDataStream & operator << (QDataStream& out, const QXmppOmemoStorage::Device& device) {
out << device.label;
out << device.keyId;
out << device.session;
out << device.unrespondedSentStanzasCount;
out << device.unrespondedReceivedStanzasCount;
out << device.removalFromDeviceListDate;
return out;
}
QDataStream & operator >> (QDataStream& in, QXmppOmemoStorage::OwnDevice& device) {
in >> device.id;
in >> device.label;
in >> device.privateIdentityKey;
in >> device.publicIdentityKey;
in >> device.latestSignedPreKeyId;
in >> device.latestPreKeyId;
return in;
}
QDataStream & operator << (QDataStream& out, const QXmppOmemoStorage::OwnDevice& device) {
out << device.id;
out << device.label;
out << device.privateIdentityKey;
out << device.publicIdentityKey;
out << device.latestSignedPreKeyId;
out << device.latestPreKeyId;
return out;
}