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squawk/core/handlers/trusthandler.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 "trusthandler.h"
#include "core/account.h"
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#include "core/adapterfunctions.h"
Core::TrustHandler::TrustHandler(Account* account):
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QObject(),
QXmppTrustStorage(),
acc(account),
db(acc->getName() + "/trust"),
protocols(db.createDirectory() + "/protocols"),
securityPolicies(db.addCache<QString, uint8_t>("securityPolicies")),
ownKeys(db.addCache<QString, QByteArray>("ownKeys")),
keysByProtocol()
{
if (!protocols.open(QIODevice::ReadWrite | QIODevice::Text)) { //never supposed to happen since I have just created a directory;
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throw LMDBAL::Directory(protocols.fileName().toStdString());
}
QTextStream in(&protocols);
while(!in.atEnd()) {
QString protocol = in.readLine();
if (protocol.size() > 1) { //I'm afraid of reading some nonsence like separately standing \n or EF or BOM, so... let it be at least 2 chars long
KeyCache* cache = db.addCache<QString, Keys>(protocol.toStdString());
keysByProtocol.insert(std::make_pair(protocol, cache));
}
}
protocols.close();
db.open();
}
Core::TrustHandler::~TrustHandler() {
protocols.close();
db.close();
}
Core::TrustHandler::KeyCache * Core::TrustHandler::getCache(const QString& encryption) {
std::map<QString, KeyCache*>::iterator itr = keysByProtocol.find(encryption);
if (itr == keysByProtocol.end()) {
return createNewCache(encryption);
} else {
return itr->second;
}
}
Core::TrustHandler::KeyCache * Core::TrustHandler::createNewCache(const QString& encryption) {
db.close();
KeyCache* cache = db.addCache<QString, Keys>(encryption.toStdString());
keysByProtocol.insert(std::make_pair(encryption, cache));
if(!protocols.open(QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text)) {
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throw LMDBAL::Directory(protocols.fileName().toStdString());
}
QTextStream out(&protocols);
out << encryption + "\n";
protocols.close();
db.open();
return cache;
}
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QXmppTask<void> Core::TrustHandler::resetAll(const QString& encryption) {
securityPolicies->removeRecord(encryption);
ownKeys->removeRecord(encryption);
std::map<QString, KeyCache*>::const_iterator itr = keysByProtocol.find(encryption);
if (itr == keysByProtocol.end())
return Core::makeReadyTask();
KeyCache* cache = itr->second;
std::map<QString, Keys> keys = cache->readAll();
cache->drop();
for (const std::pair<const QString, Keys>& pair : keys) {
bool empty = true;
for (const std::pair<const QByteArray, Shared::TrustLevel>& trust : pair.second) {
if (trust.second != Shared::TrustLevel::undecided) {
empty = false;
break;
}
}
if (!empty)
emit trustLevelsChanged(pair.first, getSummary(pair.first));
}
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return Core::makeReadyTask();
}
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QXmppTask<QXmpp::TrustLevel> Core::TrustHandler::trustLevel(
const QString& encryption,
const QString& keyOwnerJid,
const QByteArray& keyId)
{
KeyCache* cache = getCache(encryption);
Shared::TrustLevel level = Shared::TrustLevel::undecided;
try {
Keys map = cache->getRecord(keyOwnerJid);
Keys::const_iterator itr = map.find(keyId);
if (itr != map.end())
level = itr->second;
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} catch (const LMDBAL::NotFound& e) {}
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return Core::makeReadyTask(std::move(convert(level)));
}
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QXmppTask<QHash<QString, QMultiHash<QString, QByteArray>>> Core::TrustHandler::setTrustLevel(
const QString& encryption,
const QList<QString>& keyOwnerJids,
QXmpp::TrustLevel oldTrustLevel,
QXmpp::TrustLevel newTrustLevel)
{
QHash<QString, QMultiHash<QString, QByteArray>> modifiedKeys;
Shared::TrustLevel oldLevel = convert(oldTrustLevel);
Shared::TrustLevel newLevel = convert(newTrustLevel);
std::set<QString> modifiedJids;
KeyCache* cache = getCache(encryption);
for (const QString& keyOwnerJid : keyOwnerJids) {
Keys map = cache->getRecord(keyOwnerJid);
uint count = 0;
for (std::pair<const QByteArray, Shared::TrustLevel>& pair : map) {
Shared::TrustLevel& current = pair.second;
if (current == oldLevel) {
current = newLevel;
modifiedKeys[encryption].insert(keyOwnerJid, pair.first);
modifiedJids.insert(keyOwnerJid);
++count;
}
}
if (count > 0)
cache->changeRecord(keyOwnerJid, map);
}
for (const QString& jid : modifiedJids)
emit trustLevelsChanged(jid, getSummary(jid));
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return Core::makeReadyTask(std::move(modifiedKeys));
}
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QXmppTask<QHash<QString, QMultiHash<QString, QByteArray>>> Core::TrustHandler::setTrustLevel(
const QString& encryption,
const QMultiHash<QString, QByteArray>& keyIds,
QXmpp::TrustLevel trustLevel)
{
QHash<QString, QMultiHash<QString, QByteArray>> modifiedKeys;
Shared::TrustLevel level = convert(trustLevel);
std::set<QString> modifiedJids;
KeyCache* cache = getCache(encryption);
for (MultySB::const_iterator itr = keyIds.begin(), end = keyIds.end(); itr != end; ++itr) {
const QString& keyOwnerJid = itr.key();
const QByteArray& keyId = itr.value();
try {
Keys map = cache->getRecord(keyOwnerJid);
std::pair<Keys::iterator, bool> result = map.insert(std::make_pair(keyId, level));
bool changed = result.second;
if (!changed && result.first->second != level) {
result.first->second = level;
changed = true;
}
if (changed) {
modifiedKeys[encryption].insert(keyOwnerJid, keyId);
modifiedJids.insert(keyOwnerJid);
cache->changeRecord(keyOwnerJid, map);
}
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} catch (const LMDBAL::NotFound& e) {
Keys map({{keyId, level}});
modifiedKeys[encryption].insert(keyOwnerJid, keyId);
modifiedJids.insert(keyOwnerJid);
cache->addRecord(keyOwnerJid, map);
}
}
for (const QString& jid : modifiedJids)
emit trustLevelsChanged(jid, getSummary(jid));
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return Core::makeReadyTask(std::move(modifiedKeys));
}
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QXmppTask<bool> Core::TrustHandler::hasKey(const QString& encryption,
const QString& keyOwnerJid,
QXmpp::TrustLevels trustLevels)
{
KeyCache* cache = getCache(encryption);
bool found = false;
try {
Keys map = cache->getRecord(keyOwnerJid);
for (const std::pair<const QByteArray, Shared::TrustLevel>& pair : map) {
if (trustLevels.testFlag(convert(pair.second))) {
found = true;
break;
}
}
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} catch (const LMDBAL::NotFound& e) {}
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return Core::makeReadyTask(std::move(found));
}
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QXmppTask<QHash<QString, QHash<QByteArray, QXmpp::TrustLevel>>> Core::TrustHandler::keys(
const QString& encryption,
const QList<QString>& keyOwnerJids,
QXmpp::TrustLevels trustLevels)
{
HSHBTL res;
KeyCache* cache = getCache(encryption);
for (const QString& keyOwnerJid : keyOwnerJids) {
try {
Keys map = cache->getRecord(keyOwnerJid);
QHash<QByteArray, QXmpp::TrustLevel>& pRes = res[keyOwnerJid];
for (const std::pair<const QByteArray, Shared::TrustLevel>& pair : map) {
QXmpp::TrustLevel level = convert(pair.second);
if (!trustLevels || trustLevels.testFlag(level)) {
pRes.insert(pair.first, level);
}
}
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} catch (const LMDBAL::NotFound& e) {}
}
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return Core::makeReadyTask(std::move(res));
}
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QXmppTask<QHash<QXmpp::TrustLevel, QMultiHash<QString, QByteArray>>> Core::TrustHandler::keys(
const QString& encryption,
QXmpp::TrustLevels trustLevels)
{
QHash<TL, MultySB> res;
KeyCache* cache = getCache(encryption);
std::map<QString, Keys> storage = cache->readAll();
for (const std::pair<const QString, Keys>& value : storage) {
for (const std::pair<const QByteArray, Shared::TrustLevel>& pair : value.second) {
QXmpp::TrustLevel level = convert(pair.second);
if (!trustLevels || trustLevels.testFlag(level))
res[level].insert(value.first, pair.first);
}
}
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return Core::makeReadyTask(std::move(res));
}
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QXmppTask<void> Core::TrustHandler::removeKeys(const QString& encryption) {
std::map<QString, KeyCache*>::const_iterator itr = keysByProtocol.find(encryption);
if (itr == keysByProtocol.end())
return Core::makeReadyTask();
KeyCache* cache = itr->second;
std::map<QString, Keys> keys = cache->readAll();
cache->drop();
for (const std::pair<const QString, Keys>& pair : keys) {
bool empty = true;
for (const std::pair<const QByteArray, Shared::TrustLevel>& trust : pair.second) {
if (trust.second != Shared::TrustLevel::undecided) {
empty = false;
break;
}
}
if (!empty)
emit trustLevelsChanged(pair.first, getSummary(pair.first));
}
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::TrustHandler::removeKeys(const QString& encryption, const QString& keyOwnerJid) {
std::map<QString, KeyCache*>::const_iterator itr = keysByProtocol.find(encryption);
if (itr == keysByProtocol.end())
return Core::makeReadyTask();
KeyCache* cache = itr->second;
try {
cache->removeRecord(keyOwnerJid);
emit trustLevelsChanged(keyOwnerJid, getSummary(keyOwnerJid)); //TODO there is a probability of notification without the actial change
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} catch (const LMDBAL::NotFound& e) {} //if the movin entry was empty or if it consisted of Undecided keys
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::TrustHandler::removeKeys(const QString& encryption, const QList<QByteArray>& keyIds) {
std::set<QByteArray> set;
for (const QByteArray& keyId : keyIds)
set.insert(keyId);
KeyCache* cache = getCache(encryption);
std::map<QString, Keys> data = cache->readAll();
std::set<QString> modifiedJids;
for (std::map<QString, Keys>::iterator cItr = data.begin(), cEnd = data.end(); cItr != cEnd; /*no increment*/) {
Keys& byOwner = cItr->second;
for (Keys::const_iterator itr = byOwner.begin(), end = byOwner.end(); itr != end; /*no increment*/) {
const QByteArray& keyId = itr->first;
if (set.erase(keyId)) {
byOwner.erase(itr++);
modifiedJids.insert(cItr->first);
} else
++itr;
}
if (byOwner.size() > 0)
data.erase(cItr++);
else
++cItr;
}
if (modifiedJids.size() > 0) {
cache->replaceAll(data);
}
for (const QString& jid : modifiedJids)
emit trustLevelsChanged(jid, getSummary(jid));
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::TrustHandler::addKeys(
const QString& encryption,
const QString& keyOwnerJid,
const QList<QByteArray>& keyIds,
QXmpp::TrustLevel trustLevel)
{
KeyCache* cache = getCache(encryption);
Shared::TrustLevel level = convert(trustLevel);
Keys data;
bool had = false;
try {
data = cache->getRecord(keyOwnerJid);
had = true;
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} catch (const LMDBAL::NotFound& e) {}
for (const QByteArray& keyId : keyIds) {
std::pair<Keys::iterator, bool> result = data.insert(std::make_pair(keyId, level));
if (!result.second)
result.first->second = level;
}
if (had)
cache->changeRecord(keyOwnerJid, data);
else
cache->addRecord(keyOwnerJid, data);
emit trustLevelsChanged(keyOwnerJid, getSummary(keyOwnerJid));
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return Core::makeReadyTask();
}
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QXmppTask<QByteArray> Core::TrustHandler::ownKey(const QString& encryption) {
QByteArray res;
try {
res = ownKeys->getRecord(encryption);
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} catch (const LMDBAL::NotFound& e) {}
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return Core::makeReadyTask(std::move(res));
}
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QXmppTask<void> Core::TrustHandler::resetOwnKey(const QString& encryption) {
try {
ownKeys->removeRecord(encryption);
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} catch (const LMDBAL::NotFound& e) {}
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::TrustHandler::setOwnKey(const QString& encryption, const QByteArray& keyId) {
ownKeys->forceRecord(encryption, keyId);
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return Core::makeReadyTask();
}
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QXmppTask<QXmpp::TrustSecurityPolicy> Core::TrustHandler::securityPolicy(const QString& encryption) {
QXmpp::TrustSecurityPolicy res;
try {
res = static_cast<QXmpp::TrustSecurityPolicy>(securityPolicies->getRecord(encryption));
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} catch (const LMDBAL::NotFound& e) {}
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return Core::makeReadyTask(std::move(res));
}
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QXmppTask<void> Core::TrustHandler::resetSecurityPolicy(const QString& encryption) {
try {
securityPolicies->removeRecord(encryption);
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} catch (const LMDBAL::NotFound& e) {}
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return Core::makeReadyTask();
}
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QXmppTask<void> Core::TrustHandler::setSecurityPolicy(
const QString& encryption,
QXmpp::TrustSecurityPolicy securityPolicy)
{
uint8_t pol = securityPolicy;
securityPolicies->forceRecord(encryption, pol);
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return Core::makeReadyTask();
}
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Core::TrustHandler::Keys Core::TrustHandler::getKeys(Shared::EncryptionProtocol protocol, const QString& jid) const {
const QString& prt = Shared::TrustSummary::protocolKeys.at(protocol);
std::map<QString, KeyCache*>::const_iterator itr = keysByProtocol.find(prt);
if (itr != keysByProtocol.end()) {
try {
Keys map = itr->second->getRecord(jid);
return map;
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} catch (const LMDBAL::NotFound& e) {
return Keys();
}
} else {
return Keys();
}
}
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Shared::TrustSummary Core::TrustHandler::getSummary(const QString& jid) const {
Shared::TrustSummary result;
for (const std::pair<const QString, KeyCache*>& pair : keysByProtocol) {
try {
Keys keys = pair.second->getRecord(jid);
Shared::EncryptionProtocol protocol = Shared::TrustSummary::protocolValues.at(pair.first);
for (const std::pair<const QByteArray, Shared::TrustLevel>& trust : keys) {
result.increment(protocol, trust.second);
}
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} catch (const LMDBAL::NotFound& e) {}
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}
return result;
}
Shared::TrustLevel Core::TrustHandler::convert(Core::TrustHandler::TL level) {
switch (level) {
case QXmpp::TrustLevel::Undecided: return Shared::TrustLevel::undecided;
case QXmpp::TrustLevel::AutomaticallyDistrusted: return Shared::TrustLevel::automaticallyDistrusted;
case QXmpp::TrustLevel::ManuallyDistrusted: return Shared::TrustLevel::manuallyDistrusted;
case QXmpp::TrustLevel::AutomaticallyTrusted: return Shared::TrustLevel::automaticallyTrusted;
case QXmpp::TrustLevel::ManuallyTrusted: return Shared::TrustLevel::manuallyTrusted;
case QXmpp::TrustLevel::Authenticated: return Shared::TrustLevel::authenticated;
default: throw 2413; //never supposed to get here, switch case if complete, this line is just to suppress a warning
}
}
Core::TrustHandler::TL Core::TrustHandler::convert(Shared::TrustLevel level) {
switch (level) {
case Shared::TrustLevel::undecided: return QXmpp::TrustLevel::Undecided;
case Shared::TrustLevel::automaticallyDistrusted: return QXmpp::TrustLevel::AutomaticallyDistrusted;
case Shared::TrustLevel::manuallyDistrusted: return QXmpp::TrustLevel::ManuallyDistrusted;
case Shared::TrustLevel::automaticallyTrusted: return QXmpp::TrustLevel::AutomaticallyTrusted;
case Shared::TrustLevel::manuallyTrusted: return QXmpp::TrustLevel::ManuallyTrusted;
case Shared::TrustLevel::authenticated: return QXmpp::TrustLevel::Authenticated;
default: throw 2413; //never supposed to get here, switch case if complete, this line is just to suppress a warning
}
}