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/*
* gpgprocess.cpp - QProcess wrapper makes it easy to handle gpg
*
* Copyright (C) 2013 Ivan Romanov <drizt@land.ru>
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <QFileInfo>
#include "gpgprocess.h"
#include <QCoreApplication>
#include <QDir>
#ifdef Q_OS_WIN
#include <windows.h>
#endif
GpgProcess::GpgProcess(QObject *parent)
: QProcess(parent)
, _bin("")
{
_bin = findBin();
}
inline bool checkBin(const QString &bin)
{
QFileInfo fi(bin);
return fi.exists();
}
#ifdef Q_OS_WIN
static bool getRegKey(HKEY root, const char *path, QString &value)
{
HKEY hkey = 0;
bool res = false;
if(RegOpenKeyExA(root, path, 0, KEY_QUERY_VALUE, &hkey) == ERROR_SUCCESS) {
DWORD dwLen = 256;
char szValue[256];
if (RegQueryValueExA(hkey, "Install Directory", NULL, NULL, (LPBYTE)szValue, &dwLen) == ERROR_SUCCESS) {
value = QString::fromLocal8Bit(szValue);
res = true;
}
RegCloseKey(hkey);
}
return res;
}
static QString findRegGpgProgram()
{
QStringList bins;
bins << "gpg.exe" << "gpg2.exe";
HKEY root;
root = HKEY_CURRENT_USER;
const char *path = "Software\\GNU\\GnuPG";
const char *path2 = "Software\\Wow6432Node\\GNU\\GnuPG";
QString dir;
getRegKey(HKEY_CURRENT_USER, path, dir) ||
getRegKey(HKEY_CURRENT_USER, path2, dir) ||
getRegKey(HKEY_LOCAL_MACHINE, path, dir) ||
getRegKey(HKEY_LOCAL_MACHINE, path2, dir);
if (!dir.isEmpty()) {
foreach (const QString &bin, bins) {
if (checkBin(dir + "\\" + bin)) {
return dir + "\\" + bin;
}
}
}
return QString();
}
#endif
QString GpgProcess::findBin() const
{
// gpg and gpg2 has identical semantics
// so any from them can be used
QStringList bins;
#ifdef Q_OS_WIN
bins << "gpg.exe" << "gpg2.exe";
#else
bins << "gpg" << "gpg2";
#endif
// Prefer bundled gpg
foreach (const QString &bin, bins) {
if (checkBin(QCoreApplication::applicationDirPath() + "/" + bin)) {
return QCoreApplication::applicationDirPath() + "/" + bin;
}
}
#ifdef Q_OS_WIN
// On Windows look up at registry
QString bin = findRegGpgProgram();
if (!bin.isEmpty())
return bin;
#endif
// Look up at PATH environment
#ifdef Q_OS_WIN
QString pathSep = ";";
#else
QString pathSep = ":";
#endif
QStringList paths = QString::fromLocal8Bit(qgetenv("PATH")).split(pathSep, QString::SkipEmptyParts);
#ifdef Q_OS_MAC
// On Mac OS bundled always uses system default PATH
// so it need explicity add extra paths which can
// contain gpg
// Mac GPG and brew use /usr/local/bin
// MacPorts uses /opt/local/bin
paths << "/usr/local/bin" << "/opt/local/bin";
#endif
paths.removeDuplicates();
foreach (const QString &path, paths) {
foreach (const QString &bin, bins) {
if (checkBin(path + "/" + bin)) {
return path + "/" + bin;
}
}
}
// Return nothing if gpg not found
return QString();
}
bool GpgProcess::info(QString &message)
{
QStringList arguments;
arguments << "--version"
<< "--no-tty";
start(arguments);
waitForFinished();
bool res = false;
if (!_bin.isEmpty()) {
if (error() == FailedToStart) {
message = trUtf8("Can't start ") + _bin;
}
else {
message = QString("%1 %2\n%3").arg(QDir::toNativeSeparators(_bin)).arg(arguments.join(" ")).arg(QString::fromLocal8Bit(readAll()));
res = true;
}
}
else {
message = trUtf8("GnuPG program not found");
}
return res;
}
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