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/*
* Copyright 2015 Timothy Pearson <kb9vqf@pearsoncomputing.net>
*
* This file is part of cryptocardwatcher, the TDE Cryptographic Card Session Monitor
*
* cryptocardwatcher 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 3
* of the License, or (at your option) any later version.
*
* cryptocardwatcher 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 cryptocardwatcher. If not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include <stdlib.h>
#include <exception>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/file.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/select.h>
#include <sys/time.h>
#include <termios.h>
#include <signal.h>
#include <stdint.h>
#include <tqobject.h>
#include <tdeapplication.h>
#include <tdecmdlineargs.h>
#include <ksslcertificate.h>
#include <tdehardwaredevices.h>
#include <tdecryptographiccarddevice.h>
#include "watcher.h"
int lockfd = -1;
char lockFileName[256];
// --------------------------------------------------------------------------------------
// Useful function from Stack Overflow
// http://stackoverflow.com/questions/1599459/optimal-lock-file-method
// --------------------------------------------------------------------------------------
int tryGetLock(char const *lockName) {
mode_t m = umask( 0 );
int fd = open( lockName, O_RDWR|O_CREAT, 0666 );
umask( m );
if( fd >= 0 && flock( fd, LOCK_EX | LOCK_NB ) < 0 ) {
close( fd );
fd = -1;
}
return fd;
}
// --------------------------------------------------------------------------------------
// --------------------------------------------------------------------------------------
// Useful function from Stack Overflow
// http://stackoverflow.com/questions/1599459/optimal-lock-file-method
// --------------------------------------------------------------------------------------
void releaseLock(int fd, char const *lockName) {
if( fd < 0 ) {
return;
}
remove( lockName );
close( fd );
}
// --------------------------------------------------------------------------------------
void handle_sigterm(int signum) {
if (lockfd >= 0) {
releaseLock(lockfd, lockFileName);
}
exit(0);
}
static TDECmdLineOptions options[] =
{
TDECmdLineLastOption
};
int main(int argc, char *argv[]) {
int ret = -1;
// Register cleanup handlers
struct sigaction action;
memset(&action, 0, sizeof(struct sigaction));
action.sa_handler = handle_sigterm;
sigaction(SIGTERM, &action, NULL);
// Ensure only one process is running
sprintf(lockFileName, "/var/lock/cryptocardwatcher.lock");
lockfd = tryGetLock(lockFileName);
if (lockfd < 0) {
printf ("[cryptocardwatcher] Another instance of this program is already running!\n[cryptocardwatcher] Lockfile detected at '%s'\n", lockFileName);
return -2;
}
// Parse command line arguments
TDECmdLineArgs::init(argc, argv, "cryptocardwatcher", "cryptocardwatcher", "TDE Cryptographic Card Session Monitor", "0.1");
TDECmdLineArgs::addCmdLineOptions(options);
TDEApplication::addCmdLineOptions();
// Initialize TDE application
TDEApplication tdeapp(false, false);
tdeapp.disableAutoDcopRegistration();
CardWatcher* watcher = new CardWatcher();
// Initialize SmartCard readers
TDEGenericDevice *hwdevice;
TDEHardwareDevices *hwdevices = TDEGlobal::hardwareDevices();
TDEGenericHardwareList cardReaderList = hwdevices->listByDeviceClass(TDEGenericDeviceType::CryptographicCard);
for (hwdevice = cardReaderList.first(); hwdevice; hwdevice = cardReaderList.next()) {
TDECryptographicCardDevice* cdevice = static_cast<TDECryptographicCardDevice*>(hwdevice);
TQObject::connect(cdevice, TQT_SIGNAL(cardInserted(TDECryptographicCardDevice*)), watcher, TQT_SLOT(cryptographicCardInserted(TDECryptographicCardDevice*)));
TQObject::connect(cdevice, TQT_SIGNAL(cardRemoved(TDECryptographicCardDevice*)), watcher, TQT_SLOT(cryptographicCardRemoved(TDECryptographicCardDevice*)));
cdevice->enableCardMonitoring(true);
}
// Start TDE application
ret = tdeapp.exec();
// Clean up
delete watcher;
releaseLock(lockfd, lockFileName);
return ret;
}
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