keepassxc/src/browser/BrowserHost.cpp
Jonathan White 80809ace67 Replace all crypto libraries with Botan
Selected the [Botan crypto library](https://github.com/randombit/botan) due to its feature list, maintainer support, availability across all deployment platforms, and ease of use. Also evaluated Crypto++ as a viable candidate, but the additional features of Botan (PKCS#11, TPM, etc) won out.

The random number generator received a backend upgrade. Botan prefers hardware-based RNG's and will provide one if available. This is transparent to KeePassXC and a significant improvement over gcrypt.

Replaced Argon2 library with built-in Botan implementation that supports i, d, and id. This requires Botan 2.11.0 or higher. Also simplified the parameter test across KDF's.

Aligned SymmetricCipher parameters with available modes. All encrypt and decrypt operations are done in-place instead of returning new objects. This allows use of secure vectors in the future with no additional overhead.

Took this opportunity to decouple KeeShare from SSH Agent. Removed leftover code from OpenSSHKey and consolidated the SSH Agent code into the same directory. Removed bcrypt and blowfish inserts since they are provided by Botan.

Additionally simplified KeeShare settings interface by removing raw certificate byte data from the user interface. KeeShare will be further refactored in a future PR.

NOTE: This PR breaks backwards compatibility with KeeShare certificates due to different RSA key storage with Botan. As a result, new "own" certificates will need to be generated and trust re-established.

Removed YKChallengeResponseKeyCLI in favor of just using the original implementation with signal/slots.

Removed TestRandom stub since it was just faking random numbers and not actually using the backend. TestRandomGenerator now uses the actual RNG.

Greatly simplified Secret Service plugin's use of crypto functions with Botan.
2021-04-05 22:56:03 -04:00

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/*
* Copyright (C) 2020 KeePassXC Team <team@keepassxc.org>
*
* 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 "BrowserHost.h"
#include "BrowserSettings.h"
#include "BrowserShared.h"
#include <QJsonDocument>
#include <QLocalServer>
#include <QLocalSocket>
#include <QMutexLocker>
#include <QtNetwork>
#include <iostream>
#ifdef Q_OS_WIN
#include <fcntl.h>
#include <winsock2.h>
#include <windows.h>
#else
#include <sys/socket.h>
#include <sys/types.h>
#endif
BrowserHost::BrowserHost(QObject* parent)
: QObject(parent)
{
m_localServer = new QLocalServer(this);
m_localServer->setSocketOptions(QLocalServer::UserAccessOption);
connect(m_localServer.data(), SIGNAL(newConnection()), this, SLOT(proxyConnected()));
}
BrowserHost::~BrowserHost()
{
stop();
}
void BrowserHost::start()
{
if (!m_localServer->isListening()) {
m_localServer->listen(BrowserShared::localServerPath());
}
}
void BrowserHost::stop()
{
m_socketList.clear();
m_localServer->close();
}
void BrowserHost::proxyConnected()
{
auto socket = m_localServer->nextPendingConnection();
if (socket) {
m_socketList.append(socket);
connect(socket, SIGNAL(readyRead()), this, SLOT(readProxyMessage()));
connect(socket, SIGNAL(disconnected()), this, SLOT(proxyDisconnected()));
}
}
void BrowserHost::readProxyMessage()
{
QLocalSocket* socket = qobject_cast<QLocalSocket*>(QObject::sender());
if (!socket || socket->bytesAvailable() <= 0) {
return;
}
socket->setReadBufferSize(BrowserShared::NATIVEMSG_MAX_LENGTH);
int socketDesc = socket->socketDescriptor();
if (socketDesc) {
int max = BrowserShared::NATIVEMSG_MAX_LENGTH;
setsockopt(socketDesc, SOL_SOCKET, SO_SNDBUF, reinterpret_cast<char*>(&max), sizeof(max));
}
QJsonParseError error;
auto json = QJsonDocument::fromJson(socket->readAll(), &error);
if (json.isNull()) {
qWarning() << "Failed to read proxy message: " << error.errorString();
return;
}
emit clientMessageReceived(json.object());
}
void BrowserHost::sendClientMessage(const QJsonObject& json)
{
QString reply(QJsonDocument(json).toJson(QJsonDocument::Compact));
for (const auto socket : m_socketList) {
if (socket && socket->isValid() && socket->state() == QLocalSocket::ConnectedState) {
QByteArray arr = reply.toUtf8();
socket->write(arr.constData(), arr.length());
socket->flush();
}
}
}
void BrowserHost::proxyDisconnected()
{
auto socket = qobject_cast<QLocalSocket*>(QObject::sender());
m_socketList.removeOne(socket);
}