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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use the contact form at
** http://qt.digia.com/
**
** This file is part of Qt Enterprise Embedded.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** the contact form at http://qt.digia.com/
**
****************************************************************************/
#include "update.h"
#include "tar.h"
#include <QDebug>
#include <QCoreApplication>
#include <QProcess>
#include <QFile>
extern QStringList mounts;
bool writeAll(const QString &fileName, const QByteArray &content);
static QStringList allowedFiles;
QByteArray readAll(const QString &fileName);
bool execute(const QString &binary, const QStringList &arguments);
bool mount(const QString &device, const QString &mountpoint, const QString &arguments = QString());
QMap<QString,QString> parseMetaInfo(const QByteArray &data)
{
QMap<QString,QString> rc;
QList<QByteArray> list = data.split('\n');
foreach (const QByteArray &ba, list) {
if (ba.isEmpty())
continue;
int i = ba.indexOf(':');
if (i < 0 || i == ba.size())
qFatal("Invalid meta.info content: No colon found or no data after colon");
QString key = ba.left(i);
QString value = ba.mid(i+1).trimmed();
if (rc.contains(key))
qFatal("Invalid meta.info content: Same key given twice");
rc.insert(key, value);
}
if (rc.isEmpty())
qFatal("Invalid meta.info content: No keys given");
return rc;
}
Update::Update(QObject *parent)
: QObject(parent)
, mTar(0)
, mSource(0)
{
allowedFiles << "key.info" << "meta.info" << "keys.tar" << "uImage" << "rootfs.tar";
}
Update::~Update()
{
}
//# openssl dgst -sha256 -sign priv.pem file.txt > file.txt.sig
//# openssl dgst -sha256 -verify public.pem -signature file.txt.sig file.txt
void Update::setDevice(QIODevice *source)
{
if (!source) {
qFatal("Source device is NULL");
return;
}
if (mSource) {
qFatal("Source already set");
return;
}
mSource = source;
mTar = new Tar(mSource);
connect(mTar, &Tar::startingFile, this, &Update::tarStartingFile);
connect(mTar, &Tar::endingFile, this, &Update::tarEndingFile);
connect(mTar, &Tar::finished, this, &Update::tarFinished);
}
void Update::tarStartingFile(const QString &name)
{
if (name == "key.info") {
mTar->receiveContent();
} else if (name.endsWith(".sig")) {
mTar->receiveContent();
mCurrentFile = name;
mCurrentFile.chop(4);
bool found = false;
while (!allowedFiles.isEmpty()) {
QString n = allowedFiles.takeFirst();
if (n == mCurrentFile) {
found = true;
break;
}
}
if (!found)
qFatal("File not allowed");
} else if (mCurrentFile != name) {
qFatal("Invalid file order");
} else {
if (mCurrentFile == "meta.info") {
mTar->receiveContent();
} else if (mCurrentFile == "uImage") {
mount(QString(), "/mnt/boot", "remount,rw");
mTar->extractContent("/mnt/boot");
} else if (mCurrentFile == "rootfs.tar") {
qDebug() << "Formatting rootfs";
execute("mkfs." + mMetaInfo["filesystemType"], QStringList() << mMetaInfo["rootDevice"]);
mount(mMetaInfo["rootDevice"], "/mnt/root");
mTar->extractContent("/mnt/root");
} else if (mCurrentFile == "keys.tar") {
mount(QString(), "/mnt/boot", "remount,rw");
execute("rm", QStringList() << "-r" << "/mnt/boot/update/keys/");
execute("mkdir", QStringList() << "/mnt/boot/update/keys/");
mTar->extractContent("/mnt/boot/update/keys");
} else {
qFatal("Unexpected file in update data");
}
}
}
void Update::tarEndingFile(const QString &name)
{
if (name == "meta.info") {
QMap<QString,QString> map = parseMetaInfo(mTar->currentContent());
// Some rough sanity checks
if (!map.contains("version"))
qFatal("No version information found" );
if (map["version"] != "1")
qFatal("Invalid update version");
if (!map.contains("platform") || map["platform"].isEmpty())
qFatal("Platform information missing");
if (map["platform"] != readAll("/mnt/boot/update/platform").trimmed())
qFatal("Invalid platform information");
else
qDebug() << "Platform matches";
if (!map.contains("rootDevice") || map["rootDevice"].isEmpty())
qFatal("Root device information missing");
if (!QFile::exists(map["rootDevice"]))
qFatal("Root device not found");
if (!map.contains("key") || map["key"].isEmpty() || map["key"].contains('/'))
qFatal("Invalid or no key fingerprint");
if (!map.contains("digest") || map["digest"].isEmpty())
qFatal("Invalid digest type");
if (!map.contains("filesystemType") || map["filesystemType"].isEmpty() || map["filesystemType"].contains(' ') || map["filesystemType"].contains('/'))
qFatal("Invalid filesystem type");
mMetaInfo = map;
if (!mTar->setVerificationData("/mnt/boot/update/keys/" + mMetaInfo["key"], mMetaInfo["digest"]))
qFatal("Loading of certificate failed");
// Now verify the meta.info itself
if (mTar->verifyCurrentContent(mCurrentSignature)) {
qDebug() << "meta.info VERIFIED OK";
} else {
qDebug() << "meta.info VERIFICATION FAILED";
qFatal("VERIFICATION FAILED");
return;
}
} else if (name.endsWith(".sig")) {
mCurrentSignature = mTar->currentContent();
qDebug() << "Received signature with" << mCurrentSignature.size() << "bytes.";
} else {
if (mTar->checkSignature(mCurrentSignature)) {
qDebug() << "VERIFIED OK";
// FIXME: do something here
} else {
qDebug() << "VERIFICATION FAILED";
qFatal("VERIFICATION FAILED");
}
}
mTar->continueContent();
}
void Update::tarFinished()
{
qDebug() << "Update finished";
mount(QString(), "/mnt/boot", "remount,rw");
if (!writeAll("/mnt/boot/update/state", "t"))
qFatal("Could not set state to testing");
mount(QString(), "/mnt/boot", "remount,ro");
qApp->exit();
}
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