133 lines
4.9 KiB
C++
133 lines
4.9 KiB
C++
#include "propagatedownloadencrypted.h"
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#include "clientsideencryptionjobs.h"
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Q_LOGGING_CATEGORY(lcPropagateDownloadEncrypted, "nextcloud.sync.propagator.download.encrypted", QtInfoMsg)
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namespace OCC {
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PropagateDownloadEncrypted::PropagateDownloadEncrypted(OwncloudPropagator *propagator, const QString &localParentPath, SyncFileItemPtr item, QObject *parent)
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: QObject(parent)
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, _propagator(propagator)
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, _localParentPath(localParentPath)
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, _item(item)
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, _info(_item->_file)
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{
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}
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void PropagateDownloadEncrypted::start()
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{
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const auto rootPath = [=]() {
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const auto result = _propagator->remotePath();
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if (result.startsWith('/')) {
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return result.mid(1);
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} else {
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return result;
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}
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}();
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const auto remoteFilename = _item->_encryptedFileName.isEmpty() ? _item->_file : _item->_encryptedFileName;
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const auto remotePath = QString(rootPath + remoteFilename);
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const auto remoteParentPath = remotePath.left(remotePath.lastIndexOf('/'));
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// Is encrypted Now we need the folder-id
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auto job = new LsColJob(_propagator->account(), remoteParentPath, this);
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job->setProperties({"resourcetype", "http://owncloud.org/ns:fileid"});
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connect(job, &LsColJob::directoryListingSubfolders,
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this, &PropagateDownloadEncrypted::checkFolderId);
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connect(job, &LsColJob::finishedWithError,
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this, &PropagateDownloadEncrypted::folderIdError);
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job->start();
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}
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void PropagateDownloadEncrypted::folderIdError()
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{
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qCDebug(lcPropagateDownloadEncrypted) << "Failed to get encrypted metadata of folder";
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}
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void PropagateDownloadEncrypted::checkFolderId(const QStringList &list)
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{
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auto job = qobject_cast<LsColJob*>(sender());
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const QString folderId = list.first();
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qCDebug(lcPropagateDownloadEncrypted) << "Received id of folder" << folderId;
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const ExtraFolderInfo &folderInfo = job->_folderInfos.value(folderId);
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// Now that we have the folder-id we need it's JSON metadata
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auto metadataJob = new GetMetadataApiJob(_propagator->account(), folderInfo.fileId);
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connect(metadataJob, &GetMetadataApiJob::jsonReceived,
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this, &PropagateDownloadEncrypted::checkFolderEncryptedMetadata);
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connect(metadataJob, &GetMetadataApiJob::error,
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this, &PropagateDownloadEncrypted::folderEncryptedMetadataError);
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metadataJob->start();
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}
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void PropagateDownloadEncrypted::folderEncryptedMetadataError(const QByteArray & /*fileId*/, int /*httpReturnCode*/)
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{
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qCCritical(lcPropagateDownloadEncrypted) << "Failed to find encrypted metadata information of remote file" << _info.fileName();
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emit failed();
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}
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void PropagateDownloadEncrypted::checkFolderEncryptedMetadata(const QJsonDocument &json)
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{
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qCDebug(lcPropagateDownloadEncrypted) << "Metadata Received reading"
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<< _item->_instruction << _item->_file << _item->_encryptedFileName;
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const QString filename = _info.fileName();
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auto meta = new FolderMetadata(_propagator->account(), json.toJson(QJsonDocument::Compact));
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const QVector<EncryptedFile> files = meta->files();
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const QString encryptedFilename = _item->_encryptedFileName.section(QLatin1Char('/'), -1);
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for (const EncryptedFile &file : files) {
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if (encryptedFilename == file.encryptedFilename) {
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_encryptedInfo = file;
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qCDebug(lcPropagateDownloadEncrypted) << "Found matching encrypted metadata for file, starting download";
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emit fileMetadataFound();
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return;
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}
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}
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emit failed();
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qCCritical(lcPropagateDownloadEncrypted) << "Failed to find encrypted metadata information of remote file" << filename;
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}
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// TODO: Fix this. Exported in the wrong place.
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QString createDownloadTmpFileName(const QString &previous);
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bool PropagateDownloadEncrypted::decryptFile(QFile& tmpFile)
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{
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const QString tmpFileName = createDownloadTmpFileName(_item->_file + QLatin1String("_dec"));
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qCDebug(lcPropagateDownloadEncrypted) << "Content Checksum Computed starting decryption" << tmpFileName;
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tmpFile.close();
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QFile _tmpOutput(_propagator->fullLocalPath(tmpFileName), this);
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EncryptionHelper::fileDecryption(_encryptedInfo.encryptionKey,
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_encryptedInfo.initializationVector,
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&tmpFile,
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&_tmpOutput);
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qCDebug(lcPropagateDownloadEncrypted) << "Decryption finished" << tmpFile.fileName() << _tmpOutput.fileName();
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tmpFile.close();
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_tmpOutput.close();
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// we decripted the temporary into another temporary, so good bye old one
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if (!tmpFile.remove()) {
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qCDebug(lcPropagateDownloadEncrypted) << "Failed to remove temporary file" << tmpFile.errorString();
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_errorString = tmpFile.errorString();
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return false;
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}
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// Let's fool the rest of the logic into thinking this was the actual download
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tmpFile.setFileName(_tmpOutput.fileName());
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return true;
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}
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QString PropagateDownloadEncrypted::errorString() const
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{
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return _errorString;
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}
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}
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