scdaemon.cpp

/*
    utils/scdaemon.cpp
 
    This file is part of libkleopatra
    SPDX-FileCopyrightText: 2021 g10 Code GmbH
    SPDX-FileContributor: Ingo Klöcker <dev@ingo-kloecker.de>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#include <config-libkleo.h>
 
#include "scdaemon.h"
 
#include "assuan.h"
#include "hex.h"
#include "stringutils.h"
 
#include <libkleo_debug.h>
 
#if __has_include(<QGpgME/Debug>)
#include <QGpgME/Debug>
#endif
 
#include <gpgme++/context.h>
 
using namespace Kleo;
using namespace GpgME;
 
std::vector<std::string> Kleo::SCDaemon::getReaders(Error &err)
{
    std::vector<std::string> result;
 
    auto c = Context::createForEngine(AssuanEngine, &err);
    if (err) {
        qCDebug(LIBKLEO_LOG) << "Creating context for Assuan engine failed:" << err;
        return result;
    }
 
    auto assuanContext = std::shared_ptr<Context>(c.release());
    const std::string command = "SCD GETINFO reader_list";
    const auto readers = Assuan::sendDataCommand(assuanContext, command.c_str(), err);
    if (err) {
        return result;
    }
 
    result = split(readers, '\n');
    // remove empty entries; in particular, the last entry
    result.erase(std::remove_if(std::begin(result), std::end(result), std::mem_fn(&std::string::empty)), std::end(result));
 
    return result;
}