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/* |
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gvpectrl.C -- the main file for gvpectrl |
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Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl> |
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2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
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2003-2013 Marc Lehmann <gvpe@schmorp.de> |
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|
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This file is part of GVPE. |
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|
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GVPE is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License as published by the |
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Free Software Foundation; either version 3 of the License, or (at your |
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option) any later version. |
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|
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This program 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 GNU General |
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Public License for more details. |
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|
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You should have received a copy of the GNU General Public License along |
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with this program; if not, see <http://www.gnu.org/licenses/>. |
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|
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Additional permission under GNU GPL version 3 section 7 |
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|
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If you modify this Program, or any covered work, by linking or |
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combining it with the OpenSSL project's OpenSSL library (or a modified |
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version of that library), containing parts covered by the terms of the |
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OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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additional permission to convey the resulting work. Corresponding |
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Source for a non-source form of such a combination shall include the |
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source code for the parts of OpenSSL used as well as that of the |
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covered work. |
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*/ |
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|
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#include "config.h" |
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|
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#include <cstdio> |
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#include <cstring> |
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#include <cstdlib> |
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|
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#include <errno.h> |
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#include <fcntl.h> |
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#include <getopt.h> |
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#include <signal.h> |
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#include <sys/stat.h> |
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#include <sys/types.h> |
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#include <unistd.h> |
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#include <signal.h> |
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|
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#include <openssl/bn.h> |
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#include <openssl/rand.h> |
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#include <openssl/rsa.h> |
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#include <openssl/pem.h> |
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#include <openssl/evp.h> |
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|
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#include "pidfile.h" |
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|
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#include "conf.h" |
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#include "slog.h" |
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#include "util.h" |
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#include "vpn.h" |
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|
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/* If nonzero, display usage information and exit. */ |
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static int show_help; |
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|
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/* If nonzero, print the version on standard output and exit. */ |
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static int show_version; |
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|
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/* If nonzero, it will attempt to kill a running gvpe and exit. */ |
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static int kill_gvpe; |
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|
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/* If nonzero, it will attempt to kill a running gvpe and exit. */ |
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static int show_config; |
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|
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/* If nonzero, do not output anything but warnings/errors/very unusual conditions */ |
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static int quiet; |
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|
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/* If nonzero, generate public/private keypair for this net. */ |
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static int generate_keys; |
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|
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// output some debugging info, interna constants &c |
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static int debug_info; |
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|
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static struct option const long_options[] = |
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{ |
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{"config", required_argument, NULL, 'c'}, |
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{"kill", optional_argument, NULL, 'k'}, |
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{"help", no_argument, &show_help, 1}, |
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{"version", no_argument, &show_version, 1}, |
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{"generate-keys", no_argument, NULL, 'g'}, |
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{"quiet", no_argument, &quiet, 1}, |
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{"show-config", no_argument, &show_config, 's'}, |
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{"debug-info", no_argument, &debug_info, 1}, |
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{NULL, 0, NULL, 0} |
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}; |
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|
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static void |
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usage (int status) |
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{ |
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if (status != 0) |
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fprintf (stderr, _("Try `%s --help\' for more information.\n"), get_identity ()); |
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else |
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{ |
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printf (_("Usage: %s [option]...\n\n"), get_identity ()); |
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printf (_ |
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(" -c, --config=DIR Read configuration options from DIR.\n" |
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" -k, --kill[=SIGNAL] Attempt to kill a running gvpe and exit.\n" |
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" -g, --generate-keys Generate public/private RSA keypair.\n" |
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" -s, --show-config Display the configuration information.\n" |
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" -q, --quiet Be quite quiet.\n" |
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" --help Display this help and exit.\n" |
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" --version Output version information and exit.\n\n")); |
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printf (_("Report bugs to <gvpe@schmorp.de>.\n")); |
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} |
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|
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exit (status); |
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} |
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|
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static void |
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parse_options (int argc, char **argv, char **envp) |
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{ |
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int r; |
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int option_index = 0; |
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|
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while ((r = getopt_long (argc, argv, "c:k::qgs", long_options, &option_index)) != EOF) |
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{ |
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switch (r) |
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{ |
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case 0: /* long option */ |
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break; |
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|
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case 'c': /* config file */ |
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confbase = strdup (optarg); |
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break; |
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|
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case 'k': /* kill old gvpes */ |
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if (optarg) |
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{ |
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if (!strcasecmp (optarg, "HUP")) |
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kill_gvpe = SIGHUP; |
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else if (!strcasecmp (optarg, "TERM")) |
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kill_gvpe = SIGTERM; |
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else if (!strcasecmp (optarg, "KILL")) |
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kill_gvpe = SIGKILL; |
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else if (!strcasecmp (optarg, "USR1")) |
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kill_gvpe = SIGUSR1; |
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else if (!strcasecmp (optarg, "USR2")) |
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kill_gvpe = SIGUSR2; |
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else if (!strcasecmp (optarg, "INT")) |
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kill_gvpe = SIGINT; |
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else if (!strcasecmp (optarg, "ALRM")) |
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kill_gvpe = SIGALRM; |
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else |
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{ |
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kill_gvpe = atoi (optarg); |
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|
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if (!kill_gvpe) |
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{ |
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fprintf (stderr, |
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_ |
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("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"), |
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optarg); |
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usage (1); |
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} |
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} |
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} |
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else |
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kill_gvpe = SIGTERM; |
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|
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break; |
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|
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case 'g': /* generate public/private keypair */ |
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generate_keys = RSABITS; |
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break; |
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|
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case 's': |
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show_config = 1; |
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break; |
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|
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case 'q': |
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quiet = 1; |
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break; |
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|
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case '?': |
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usage (1); |
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|
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default: |
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break; |
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} |
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} |
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} |
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|
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// this function prettyprints the key generation process |
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static int |
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indicator (int a, int b, BN_GENCB *cb) |
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{ |
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if (quiet) |
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return 1; |
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|
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switch (a) |
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{ |
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case 0: |
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fprintf (stderr, "."); |
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break; |
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|
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case 1: |
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fprintf (stderr, "+"); |
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break; |
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|
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case 2: |
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fprintf (stderr, "-"); |
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break; |
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|
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case 3: |
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switch (b) |
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{ |
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case 0: |
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fprintf (stderr, " p\n"); |
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break; |
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|
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case 1: |
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fprintf (stderr, " q\n"); |
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break; |
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|
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default: |
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fprintf (stderr, "?"); |
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} |
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break; |
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|
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default: |
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fprintf (stderr, "?"); |
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} |
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|
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return 1; |
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} |
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|
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/* |
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* generate public/private RSA keypairs for all hosts that don't have one. |
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*/ |
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static int |
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keygen (int bits) |
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{ |
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FILE *f, *pubf; |
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char *fname; |
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|
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asprintf (&fname, "%s/pubkey", confbase); |
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mkdir (fname, 0700); |
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free (fname); |
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|
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for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i) |
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{ |
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conf_node *node = *i; |
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|
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::thisnode = node->nodename; |
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|
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fname = conf.config_filename (conf.prikeyfile, "hostkey"); |
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|
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f = fopen (fname, "ab"); |
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|
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/* some libcs are buggy and require an extra seek to the end */ |
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if (!f || fseek (f, 0, SEEK_END)) |
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{ |
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perror (fname); |
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exit (EXIT_FAILURE); |
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} |
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|
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if (ftell (f)) |
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{ |
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if (!quiet) |
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fprintf (stderr, "'%s' already exists, skipping node %s\n", fname, node->nodename); |
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|
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free (fname); |
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fclose (f); |
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continue; |
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} |
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|
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free (fname); |
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|
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fprintf (stderr, _("generating %d bits key for %s:\n"), bits, node->nodename); |
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|
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RSA *rsa = RSA_new (); |
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BIGNUM *e = BN_new (); |
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BN_set_bit (e, 0); BN_set_bit (e, 16); // 0x10001, 65537 |
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|
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#if OPENSSL_VERSION_NUMBER < 0x10100000 |
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BN_GENCB cb; |
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BN_GENCB_set (&cb, indicator, 0); |
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require (RSA_generate_key_ex (rsa, bits, e, &cb)); |
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#else |
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BN_GENCB *cb = BN_GENCB_new (); |
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BN_GENCB_set (cb, indicator, 0); |
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require (RSA_generate_key_ex (rsa, bits, e, cb)); |
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#endif |
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|
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fprintf (stderr, _("Done.\n")); |
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|
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fname = conf.config_filename ("pubkey/%s", 0); |
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pubf = fopen (fname, "wb"); |
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if (!pubf) |
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{ |
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perror (fname); |
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exit (EXIT_FAILURE); |
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} |
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|
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free (fname); |
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|
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require (PEM_write_RSAPublicKey (pubf, rsa)); |
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fclose (pubf); |
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|
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require (PEM_write_RSAPrivateKey (f, rsa, NULL, NULL, 0, NULL, NULL)); |
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fclose (f); |
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|
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BN_free (e); |
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RSA_free (rsa); |
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} |
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|
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return 0; |
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} |
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|
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int |
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main (int argc, char **argv, char **envp) |
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{ |
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set_identity (argv[0]); |
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log_to (LOGTO_STDERR); |
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|
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setlocale (LC_ALL, ""); |
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bindtextdomain (PACKAGE, LOCALEDIR); |
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textdomain (PACKAGE); |
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|
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parse_options (argc, argv, envp); |
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|
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if (show_version) |
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{ |
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printf (_("%s version %s (built %s %s, protocol version %d.%d)\n"), get_identity (), |
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VERSION, __DATE__, __TIME__, PROTOCOL_MAJOR, PROTOCOL_MINOR); |
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printf (_("Built with kernel interface %s/%s.\n"), IFTYPE, IFSUBTYPE); |
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printf (_ |
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("Copyright (C) 2003-2013 Marc Lehmann <gvpe@schmorp.de> and others.\n" |
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"See the AUTHORS file for a complete list.\n\n" |
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"vpe comes with ABSOLUTELY NO WARRANTY. This is free software,\n" |
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"and you are welcome to redistribute it under certain conditions;\n" |
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"see the file COPYING for details.\n")); |
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|
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return 0; |
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} |
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|
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if (show_help) |
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usage (0); |
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|
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{ |
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configuration_parser (conf, false, 0, 0); |
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} |
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|
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if (debug_info) |
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{ |
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printf ("cipher_nid=%d\n", EVP_CIPHER_nid (CIPHER ())); |
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printf ("mac_nid=%d\n", EVP_MD_type (MAC_DIGEST ())); |
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printf ("auth_nid=%d\n", EVP_MD_type (AUTH_DIGEST ())); |
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printf ("sizeof_auth_data=%d\n", sizeof (auth_data)); |
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printf ("sizeof_rsa_data=%d\n", sizeof (rsa_data)); |
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printf ("sizeof_rsa_data_extra_auth=%d\n", sizeof (((rsa_data *)0)->extra_auth)); |
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printf ("raw_overhead=%d\n", VPE_OVERHEAD); |
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printf ("vpn_overhead=%d\n", VPE_OVERHEAD + 6 + 6); |
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printf ("udp_overhead=%d\n", UDP_OVERHEAD + VPE_OVERHEAD + 6 + 6); |
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exit (EXIT_SUCCESS); |
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} |
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|
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if (generate_keys) |
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{ |
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RAND_load_file (conf.seed_dev, SEED_SIZE); |
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exit (keygen (generate_keys)); |
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} |
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|
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if (kill_gvpe) |
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exit (kill_other (kill_gvpe)); |
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|
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if (show_config) |
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{ |
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conf.print (); |
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exit (EXIT_SUCCESS); |
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} |
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|
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usage (1); |
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} |
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|
