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Merge pull request #5093 from nextcloud/work/validate-edit-locally-token
Validate and sanitise edit locally token and relpath before sending to server
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commit
b6deeecfda
1 changed files with 40 additions and 3 deletions
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@ -1488,6 +1488,27 @@ void FolderMan::editFileLocally(const QString &userId, const QString &relPath, c
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return;
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}
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// We want to check that the path is canonical and not relative
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// (i.e. that it doesn't contain ../../) but we always receive
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// a relative path, so let's make it absolute by prepending a
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// slash
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auto slashPrefixedPath = relPath;
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if (!slashPrefixedPath.startsWith('/')) {
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slashPrefixedPath.prepend('/');
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}
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// Let's check that the filepath is canonical, and that the request
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// contains no funny behaviour regarding paths
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const auto cleanedPath = QDir::cleanPath(slashPrefixedPath);
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if (cleanedPath != slashPrefixedPath) {
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qCWarning(lcFolderMan) << "Provided relPath was:" << relPath
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<< "which is not canonical (cleaned path was:" << cleanedPath << ")";
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showError(accountFound, tr("Invalid file path was provided."), tr("Please try again."));
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return;
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}
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const auto foundFiles = findFileInLocalFolders(relPath, accountFound->account());
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if (foundFiles.isEmpty()) {
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@ -1513,7 +1534,18 @@ void FolderMan::editFileLocally(const QString &userId, const QString &relPath, c
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showError(accountFound, tr("Could not find a folder to sync."), relPath);
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return;
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}
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// Token is an alphanumeric string 128 chars long.
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// Ensure that is what we received and what we are sending to the server.
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const QRegularExpression tokenRegex("^[a-zA-Z0-9]{128}$");
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const auto regexMatch = tokenRegex.match(token);
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// Means invalid token type received, be cautious with bad token
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if(!regexMatch.hasMatch()) {
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showError(accountFound, tr("Invalid token received."), tr("Please try again."));
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return;
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}
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const auto relPathSplit = relPath.split(QLatin1Char('/'));
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if (relPathSplit.size() > 0) {
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Systray::instance()->createEditFileLocallyLoadingDialog(relPathSplit.last());
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@ -1522,9 +1554,14 @@ void FolderMan::editFileLocally(const QString &userId, const QString &relPath, c
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return;
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}
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const auto checkTokenForEditLocally = new SimpleApiJob(accountFound->account(), QStringLiteral("/ocs/v2.php/apps/files/api/v1/openlocaleditor/%1").arg(token));
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const auto encodedToken = QString::fromUtf8(QUrl::toPercentEncoding(token)); // Sanitise the token
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const auto encodedRelPath = QUrl::toPercentEncoding(slashPrefixedPath); // Sanitise the relPath
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const auto checkTokenForEditLocally = new SimpleApiJob(accountFound->account(), QStringLiteral("/ocs/v2.php/apps/files/api/v1/openlocaleditor/%1").arg(encodedToken));
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QUrlQuery params;
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params.addQueryItem(QStringLiteral("path"), slashPrefixedPath);
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checkTokenForEditLocally->addQueryParams(params);
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checkTokenForEditLocally->setVerb(SimpleApiJob::Verb::Post);
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checkTokenForEditLocally->setBody(QByteArray{"path=/"}.append(relPath.toUtf8()));
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connect(checkTokenForEditLocally, &SimpleApiJob::resultReceived, checkTokenForEditLocally, [this, folderForFile, localFilePath, showError, accountFound, relPath] (int statusCode) {
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constexpr auto HTTP_OK_CODE = 200;
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if (statusCode != HTTP_OK_CODE) {
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