/*************************************************************************** * ncrack_tty.cc -- Handles runtime interaction with Ncrack, so you can * * increase verbosity/debugging or obtain a status line upon request. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2011 Insecure.Com LLC. Nmap is * * also a registered trademark of Insecure.Com LLC. This program is free * * software; you may redistribute and/or modify it under the terms of the * * GNU General Public License as published by the Free Software * * Foundation; Version 2 with the clarifications and exceptions described * * below. This guarantees your right to use, modify, and redistribute * * this software under certain conditions. If you wish to embed Nmap * * technology into proprietary software, we sell alternative licenses * * (contact sales@insecure.com). Dozens of software vendors already * * license Nmap technology such as host discovery, port scanning, OS * * detection, and version detection. * * * * Note that the GPL places important restrictions on "derived works", yet * * it does not provide a detailed definition of that term. To avoid * * misunderstandings, we consider an application to constitute a * * "derivative work" for the purpose of this license if it does any of the * * following: * * o Integrates source code from Nmap * * o Reads or includes Nmap copyrighted data files, such as * * nmap-os-db or nmap-service-probes. * * o Executes Nmap and parses the results (as opposed to typical shell or * * execution-menu apps, which simply display raw Nmap output and so are * * not derivative works.) * * o Integrates/includes/aggregates Nmap into a proprietary executable * * installer, such as those produced by InstallShield. * * o Links to a library or executes a program that does any of the above * * * * The term "Nmap" should be taken to also include any portions or derived * * works of Nmap. This list is not exclusive, but is meant to clarify our * * interpretation of derived works with some common examples. Our * * interpretation applies only to Nmap--we don't speak for other people's * * GPL works. * * * * If you have any questions about the GPL licensing restrictions on using * * Nmap in non-GPL works, we would be happy to help. As mentioned above, * * we also offer alternative license to integrate Nmap into proprietary * * applications and appliances. These contracts have been sold to dozens * * of software vendors, and generally include a perpetual license as well * * as providing for priority support and updates as well as helping to * * fund the continued development of Nmap technology. Please email * * sales@insecure.com for further information. * * * * As a special exception to the GPL terms, Insecure.Com LLC grants * * permission to link the code of this program with any version of the * * OpenSSL library which is distributed under a license identical to that * * listed in the included docs/licenses/OpenSSL.txt file, and distribute * * linked combinations including the two. You must obey the GNU GPL in all * * respects for all of the code used other than OpenSSL. If you modify * * this file, you may extend this exception to your version of the file, * * but you are not obligated to do so. * * * * If you received these files with a written license agreement or * * contract stating terms other than the terms above, then that * * alternative license agreement takes precedence over these comments. * * * * Source is provided to this software because we believe users have a * * right to know exactly what a program is going to do before they run it. * * This also allows you to audit the software for security holes (none * * have been found so far). * * * * Source code also allows you to port Nmap to new platforms, fix bugs, * * and add new features. You are highly encouraged to send your changes * * to nmap-dev@insecure.org for possible incorporation into the main * * distribution. By sending these changes to Fyodor or one of the * * Insecure.Org development mailing lists, it is assumed that you are * * offering the Nmap Project (Insecure.Com LLC) the unlimited, * * non-exclusive right to reuse, modify, and relicense the code. Nmap * * will always be available Open Source, but this is important because the * * inability to relicense code has caused devastating problems for other * * Free Software projects (such as KDE and NASM). We also occasionally * * relicense the code to third parties as discussed above. If you wish to * * specify special license conditions of your contributions, just say so * * when you send them. * * * * 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 v2.0 for more details at * * http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file * * included with Nmap. * * * ***************************************************************************/ #ifndef WIN32 #include "ncrack_config.h" #endif #include #if HAVE_SYS_STAT_H #include #endif #if HAVE_FCNTL_H #include #endif #if HAVE_TERMIOS_H #include #endif #if HAVE_UNISTD_H #include #endif #include #include "ncrack_tty.h" #include "utils.h" #include "NcrackOps.h" extern NcrackOps o; #ifdef WIN32 #include // Microsoft's runtime makes this fairly simple. :) void tty_init() { return; } static int tty_getchar() { return _kbhit() ? _getch() : -1; } static void tty_done() { return; } static void tty_flush(void) { static HANDLE stdinput = GetStdHandle(STD_INPUT_HANDLE); FlushConsoleInputBuffer(stdinput); } #else #if !defined(O_NONBLOCK) && defined(O_NDELAY) #define O_NONBLOCK O_NDELAY #endif #ifdef __CYGWIN32__ #include #include #ifndef __CYGWIN__ extern int tcgetattr(int fd, struct termios *termios_p); extern int tcsetattr(int fd, int actions, struct termios *termios_p); #endif #endif static int tty_fd = 0; static struct termios saved_ti; static int tty_getchar() { int c, numChars; #ifdef __CYGWIN32__ fd_set set; struct timeval tv; #endif if (tty_fd && tcgetpgrp(tty_fd) == getpid()) { /* This is so that when the terminal has been disconnected, * it will be reconnected when possible. If it slows things down, * just remove it */ // tty_init(); #ifdef __CYGWIN32__ FD_ZERO(&set); FD_SET(tty_fd, &set); tv.tv_sec = 0; tv.tv_usec = 0; if (select(tty_fd + 1, &set, NULL, NULL, &tv) <= 0) return -1; #endif c = 0; numChars = read(tty_fd, &c, 1); if (numChars > 0) return c; } return -1; } static void tty_done() { if (!tty_fd) return; tcsetattr(tty_fd, TCSANOW, &saved_ti); close(tty_fd); tty_fd = 0; } static void tty_flush(void) { /* we don't need to test for tty_fd==0 here because * this isn't called unless we succeeded */ tcflush(tty_fd, TCIFLUSH); } /* * Initializes the terminal for unbuffered non-blocking input. Also * registers tty_done() via atexit(). You need to call this before * you ever call keyWasPressed(). */ void tty_init() { struct termios ti; if (tty_fd) return; if ((tty_fd = open("/dev/tty", O_RDONLY | O_NONBLOCK)) < 0) return; #ifndef __CYGWIN32__ if (tcgetpgrp(tty_fd) != getpid()) { close(tty_fd); return; } #endif tcgetattr(tty_fd, &ti); saved_ti = ti; ti.c_lflag &= ~(ICANON | ECHO); ti.c_cc[VMIN] = 1; ti.c_cc[VTIME] = 0; tcsetattr(tty_fd, TCSANOW, &ti); atexit(tty_done); } #endif //!win32 /* Catches all of the predefined keypresses and interpret them, and it will also tell you if you should print anything. A value of KEYPRESS_STATUS being returned means a nonstandard key has been pressed and the calling method should print a status message. A value of KEYPRESS_CREDS means that the credentials found so far should be printed */ int keyWasPressed() { /* Where we keep the automatic stats printing schedule. */ static struct timeval stats_time = { 0, 0 }; int c; if ((c = tty_getchar()) >= 0) { tty_flush(); /* flush input queue */ if (c == 'v') { o.verbose++; log_write(LOG_STDOUT, "Verbosity Increased to %d.\n", o.verbose); } else if (c == 'V') { if (o.verbose > 0) o.verbose--; log_write(LOG_STDOUT, "Verbosity Decreased to %d.\n", o.verbose); } else if (c == 'd') { o.debugging++; log_write(LOG_STDOUT, "Debugging Increased to %d.\n", o.debugging); } else if (c == 'D') { if (o.debugging > 0) o.debugging--; log_write(LOG_STDOUT, "Debugging Decreased to %d.\n", o.debugging); } else if (c == 'p' || c == 'P') { return KEYPRESS_CREDS; } else if (c == '?') { log_write(LOG_STDOUT, "Interactive keyboard commands:\n" "? Display this information\n" "v/V Increase/decrease verbosity\n" "d/D Increase/decrease debugging\n" "p/P Display found credentials\n" "anything else Print status\n"); } else { return KEYPRESS_STATUS; } } /* Check if we need to print a status update according to the --stats-every option. */ if (o.stats_interval != 0.0) { struct timeval now; gettimeofday(&now, NULL); if (stats_time.tv_sec == 0) { /* Initialize the scheduled stats time. */ stats_time = *o.getStartTime(); TIMEVAL_ADD(stats_time, stats_time, (time_t)(o.stats_interval * 1000000)); } if (TIMEVAL_AFTER(now, stats_time)) { /* Advance to the next print time. */ TIMEVAL_ADD(stats_time, stats_time, (time_t)(o.stats_interval * 1000000)); /* If it's still in the past, catch it up to the present. */ if (TIMEVAL_AFTER(now, stats_time)) stats_time = now; /* Instruct the caller to print status too. */ return KEYPRESS_STATUS; } } return 0; }