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140 lines
4.4 KiB
140 lines
4.4 KiB
/*
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* Copyright 2015 Timothy Pearson <kb9vqf@pearsoncomputing.net>
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*
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* This file is part of cryptocardwatcher, the TDE Cryptographic Card Session Monitor
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*
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* cryptocardwatcher is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3
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* of the License, or (at your option) any later version.
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*
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* cryptocardwatcher is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with cryptocardwatcher. If not, see http://www.gnu.org/licenses/.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <exception>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <sys/file.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <termios.h>
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#include <signal.h>
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#include <stdint.h>
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#include <tqobject.h>
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#include <tdeapplication.h>
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#include <tdecmdlineargs.h>
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#include <ksslcertificate.h>
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#include <tdehardwaredevices.h>
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#include <tdecryptographiccarddevice.h>
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#include "watcher.h"
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int lockfd = -1;
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char lockFileName[256];
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// --------------------------------------------------------------------------------------
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// Useful function from Stack Overflow
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// http://stackoverflow.com/questions/1599459/optimal-lock-file-method
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// --------------------------------------------------------------------------------------
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int tryGetLock(char const *lockName) {
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mode_t m = umask( 0 );
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int fd = open( lockName, O_RDWR|O_CREAT, 0666 );
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umask( m );
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if( fd >= 0 && flock( fd, LOCK_EX | LOCK_NB ) < 0 ) {
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close( fd );
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fd = -1;
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}
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return fd;
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}
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// --------------------------------------------------------------------------------------
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// --------------------------------------------------------------------------------------
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// Useful function from Stack Overflow
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// http://stackoverflow.com/questions/1599459/optimal-lock-file-method
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// --------------------------------------------------------------------------------------
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void releaseLock(int fd, char const *lockName) {
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if( fd < 0 ) {
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return;
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}
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remove( lockName );
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close( fd );
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}
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// --------------------------------------------------------------------------------------
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void handle_sigterm(int signum) {
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if (lockfd >= 0) {
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releaseLock(lockfd, lockFileName);
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}
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exit(0);
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}
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static TDECmdLineOptions options[] =
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{
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TDECmdLineLastOption
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};
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int main(int argc, char *argv[]) {
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int ret = -1;
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// Register cleanup handlers
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struct sigaction action;
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memset(&action, 0, sizeof(struct sigaction));
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action.sa_handler = handle_sigterm;
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sigaction(SIGTERM, &action, NULL);
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// Ensure only one process is running
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sprintf(lockFileName, "/var/lock/cryptocardwatcher.lock");
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lockfd = tryGetLock(lockFileName);
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if (lockfd < 0) {
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printf ("[cryptocardwatcher] Another instance of this program is already running!\n[cryptocardwatcher] Lockfile detected at '%s'\n", lockFileName);
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return -2;
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}
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// Parse command line arguments
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TDECmdLineArgs::init(argc, argv, "cryptocardwatcher", "cryptocardwatcher", "TDE Cryptographic Card Session Monitor", "0.1");
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TDECmdLineArgs::addCmdLineOptions(options);
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TDEApplication::addCmdLineOptions();
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// Initialize TDE application
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TDEApplication tdeapp(false, false);
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tdeapp.disableAutoDcopRegistration();
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CardWatcher* watcher = new CardWatcher();
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// Initialize SmartCard readers
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TDEGenericDevice *hwdevice;
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TDEHardwareDevices *hwdevices = TDEGlobal::hardwareDevices();
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TDEGenericHardwareList cardReaderList = hwdevices->listByDeviceClass(TDEGenericDeviceType::CryptographicCard);
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for (hwdevice = cardReaderList.first(); hwdevice; hwdevice = cardReaderList.next()) {
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TDECryptographicCardDevice* cdevice = static_cast<TDECryptographicCardDevice*>(hwdevice);
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TQObject::connect(cdevice, TQ_SIGNAL(cardInserted(TDECryptographicCardDevice*)), watcher, TQ_SLOT(cryptographicCardInserted(TDECryptographicCardDevice*)));
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TQObject::connect(cdevice, TQ_SIGNAL(cardRemoved(TDECryptographicCardDevice*)), watcher, TQ_SLOT(cryptographicCardRemoved(TDECryptographicCardDevice*)));
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cdevice->enableCardMonitoring(true);
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}
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// Start TDE application
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ret = tdeapp.exec();
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// Clean up
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delete watcher;
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releaseLock(lockfd, lockFileName);
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return ret;
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}
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