| 1 |
/* |
| 2 |
vpectrl.C -- the main file for vpectrl |
| 3 |
Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl> |
| 4 |
2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
| 5 |
2003 Marc Lehmann <pcg@goof.com> |
| 6 |
|
| 7 |
This program is free software; you can redistribute it and/or modify |
| 8 |
it under the terms of the GNU General Public License as published by |
| 9 |
the Free Software Foundation; either version 2 of the License, or |
| 10 |
(at your option) any later version. |
| 11 |
|
| 12 |
This program is distributed in the hope that it will be useful, |
| 13 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 |
GNU General Public License for more details. |
| 16 |
|
| 17 |
You should have received a copy of the GNU General Public License |
| 18 |
along with this program; if not, write to the Free Software |
| 19 |
Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 |
*/ |
| 21 |
|
| 22 |
#include "config.h" |
| 23 |
|
| 24 |
#include <cstdio> |
| 25 |
#include <cstring> |
| 26 |
#include <clocale> |
| 27 |
|
| 28 |
#include <errno.h> |
| 29 |
#include <fcntl.h> |
| 30 |
#include <getopt.h> |
| 31 |
#include <signal.h> |
| 32 |
#include <sys/stat.h> |
| 33 |
#include <sys/types.h> |
| 34 |
#include <unistd.h> |
| 35 |
#include <signal.h> |
| 36 |
|
| 37 |
#include <openssl/rand.h> |
| 38 |
#include <openssl/rsa.h> |
| 39 |
#include <openssl/pem.h> |
| 40 |
#include <openssl/evp.h> |
| 41 |
|
| 42 |
#include "pidfile.h" |
| 43 |
|
| 44 |
#include "gettext.h" |
| 45 |
|
| 46 |
#include "conf.h" |
| 47 |
#include "slog.h" |
| 48 |
#include "util.h" |
| 49 |
#include "vpn.h" |
| 50 |
|
| 51 |
/* If nonzero, display usage information and exit. */ |
| 52 |
static int show_help; |
| 53 |
|
| 54 |
/* If nonzero, print the version on standard output and exit. */ |
| 55 |
static int show_version; |
| 56 |
|
| 57 |
/* If nonzero, it will attempt to kill a running vped and exit. */ |
| 58 |
static int kill_vped; |
| 59 |
|
| 60 |
/* If nonzero, it will attempt to kill a running vped and exit. */ |
| 61 |
static int show_config; |
| 62 |
|
| 63 |
/* If nonzero, generate public/private keypair for this net. */ |
| 64 |
static int generate_keys; |
| 65 |
|
| 66 |
static struct option const long_options[] = |
| 67 |
{ |
| 68 |
{"config", required_argument, NULL, 'c'}, |
| 69 |
{"kill", optional_argument, NULL, 'k'}, |
| 70 |
{"help", no_argument, &show_help, 1}, |
| 71 |
{"version", no_argument, &show_version, 1}, |
| 72 |
{"generate-keys", no_argument, NULL, 'g'}, |
| 73 |
{"show-config", no_argument, &show_config, 's'}, |
| 74 |
{NULL, 0, NULL, 0} |
| 75 |
}; |
| 76 |
|
| 77 |
static void |
| 78 |
usage (int status) |
| 79 |
{ |
| 80 |
if (status != 0) |
| 81 |
fprintf (stderr, _("Try `%s --help\' for more information.\n"), get_identity ()); |
| 82 |
else |
| 83 |
{ |
| 84 |
printf (_("Usage: %s [option]...\n\n"), get_identity ()); |
| 85 |
printf (_ |
| 86 |
(" -c, --config=DIR Read configuration options from DIR.\n" |
| 87 |
" -k, --kill[=SIGNAL] Attempt to kill a running vped and exit.\n" |
| 88 |
" -g, --generate-keys Generate public/private RSA keypair.\n" |
| 89 |
" -s, --show-config Display the configuration information.\n" |
| 90 |
" --help Display this help and exit.\n" |
| 91 |
" --version Output version information and exit.\n\n")); |
| 92 |
printf (_("Report bugs to <vpe@plan9.de>.\n")); |
| 93 |
} |
| 94 |
|
| 95 |
exit (status); |
| 96 |
} |
| 97 |
|
| 98 |
void |
| 99 |
parse_options (int argc, char **argv, char **envp) |
| 100 |
{ |
| 101 |
int r; |
| 102 |
int option_index = 0; |
| 103 |
|
| 104 |
while ((r = |
| 105 |
getopt_long (argc, argv, "c:k::gs", long_options, |
| 106 |
&option_index)) != EOF) |
| 107 |
{ |
| 108 |
switch (r) |
| 109 |
{ |
| 110 |
case 0: /* long option */ |
| 111 |
break; |
| 112 |
|
| 113 |
case 'c': /* config file */ |
| 114 |
confbase = strdup (optarg); |
| 115 |
break; |
| 116 |
|
| 117 |
case 'k': /* kill old vpeds */ |
| 118 |
if (optarg) |
| 119 |
{ |
| 120 |
if (!strcasecmp (optarg, "HUP")) |
| 121 |
kill_vped = SIGHUP; |
| 122 |
else if (!strcasecmp (optarg, "TERM")) |
| 123 |
kill_vped = SIGTERM; |
| 124 |
else if (!strcasecmp (optarg, "KILL")) |
| 125 |
kill_vped = SIGKILL; |
| 126 |
else if (!strcasecmp (optarg, "USR1")) |
| 127 |
kill_vped = SIGUSR1; |
| 128 |
else if (!strcasecmp (optarg, "USR2")) |
| 129 |
kill_vped = SIGUSR2; |
| 130 |
else if (!strcasecmp (optarg, "WINCH")) |
| 131 |
kill_vped = SIGWINCH; |
| 132 |
else if (!strcasecmp (optarg, "INT")) |
| 133 |
kill_vped = SIGINT; |
| 134 |
else if (!strcasecmp (optarg, "ALRM")) |
| 135 |
kill_vped = SIGALRM; |
| 136 |
else |
| 137 |
{ |
| 138 |
kill_vped = atoi (optarg); |
| 139 |
|
| 140 |
if (!kill_vped) |
| 141 |
{ |
| 142 |
fprintf (stderr, |
| 143 |
_ |
| 144 |
("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"), |
| 145 |
optarg); |
| 146 |
usage (1); |
| 147 |
} |
| 148 |
} |
| 149 |
} |
| 150 |
else |
| 151 |
kill_vped = SIGTERM; |
| 152 |
|
| 153 |
break; |
| 154 |
|
| 155 |
case 'g': /* generate public/private keypair */ |
| 156 |
generate_keys = RSA_KEYBITS; |
| 157 |
break; |
| 158 |
|
| 159 |
case 's': |
| 160 |
show_config = 1; |
| 161 |
break; |
| 162 |
|
| 163 |
case '?': |
| 164 |
usage (1); |
| 165 |
|
| 166 |
default: |
| 167 |
break; |
| 168 |
} |
| 169 |
} |
| 170 |
} |
| 171 |
|
| 172 |
/* This function prettyprints the key generation process */ |
| 173 |
|
| 174 |
void |
| 175 |
indicator (int a, int b, void *p) |
| 176 |
{ |
| 177 |
switch (a) |
| 178 |
{ |
| 179 |
case 0: |
| 180 |
fprintf (stderr, "."); |
| 181 |
break; |
| 182 |
|
| 183 |
case 1: |
| 184 |
fprintf (stderr, "+"); |
| 185 |
break; |
| 186 |
|
| 187 |
case 2: |
| 188 |
fprintf (stderr, "-"); |
| 189 |
break; |
| 190 |
|
| 191 |
case 3: |
| 192 |
switch (b) |
| 193 |
{ |
| 194 |
case 0: |
| 195 |
fprintf (stderr, " p\n"); |
| 196 |
break; |
| 197 |
|
| 198 |
case 1: |
| 199 |
fprintf (stderr, " q\n"); |
| 200 |
break; |
| 201 |
|
| 202 |
default: |
| 203 |
fprintf (stderr, "?"); |
| 204 |
} |
| 205 |
break; |
| 206 |
|
| 207 |
default: |
| 208 |
fprintf (stderr, "?"); |
| 209 |
} |
| 210 |
} |
| 211 |
|
| 212 |
/* |
| 213 |
* generate public/private RSA keypairs for all hosts that don't have one. |
| 214 |
*/ |
| 215 |
int |
| 216 |
keygen (int bits) |
| 217 |
{ |
| 218 |
RSA *rsa_key; |
| 219 |
FILE *f; |
| 220 |
char *name = NULL; |
| 221 |
char *fname; |
| 222 |
|
| 223 |
asprintf (&fname, "%s/hostkeys", confbase); |
| 224 |
mkdir (fname, 0700); |
| 225 |
free (fname); |
| 226 |
|
| 227 |
asprintf (&fname, "%s/pubkey", confbase); |
| 228 |
mkdir (fname, 0700); |
| 229 |
free (fname); |
| 230 |
|
| 231 |
for (configuration::node_vector::iterator i = conf.nodes.begin (); i != conf.nodes.end (); ++i) |
| 232 |
{ |
| 233 |
conf_node *node = *i; |
| 234 |
|
| 235 |
asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename); |
| 236 |
|
| 237 |
f = fopen (fname, "a"); |
| 238 |
|
| 239 |
if (!f) |
| 240 |
{ |
| 241 |
perror (fname); |
| 242 |
exit (1); |
| 243 |
} |
| 244 |
|
| 245 |
if (ftell (f)) |
| 246 |
{ |
| 247 |
fprintf (stderr, "'%s' already exists, skipping this node\n", |
| 248 |
fname); |
| 249 |
fclose (f); |
| 250 |
continue; |
| 251 |
} |
| 252 |
|
| 253 |
fprintf (stderr, _("generating %d bits key for %s:\n"), bits, |
| 254 |
node->nodename); |
| 255 |
|
| 256 |
rsa_key = RSA_generate_key (bits, 0xFFFF, indicator, NULL); |
| 257 |
|
| 258 |
if (!rsa_key) |
| 259 |
{ |
| 260 |
fprintf (stderr, _("error during key generation!\n")); |
| 261 |
return -1; |
| 262 |
} |
| 263 |
else |
| 264 |
fprintf (stderr, _("Done.\n")); |
| 265 |
|
| 266 |
PEM_write_RSAPublicKey (f, rsa_key); |
| 267 |
fclose (f); |
| 268 |
free (fname); |
| 269 |
|
| 270 |
asprintf (&fname, "%s/hostkeys/%s", confbase, node->nodename); |
| 271 |
|
| 272 |
f = fopen (fname, "a"); |
| 273 |
if (!f) |
| 274 |
{ |
| 275 |
perror (fname); |
| 276 |
exit (1); |
| 277 |
} |
| 278 |
|
| 279 |
PEM_write_RSAPrivateKey (f, rsa_key, NULL, NULL, 0, NULL, NULL); |
| 280 |
fclose (f); |
| 281 |
free (fname); |
| 282 |
} |
| 283 |
|
| 284 |
return 0; |
| 285 |
} |
| 286 |
|
| 287 |
int |
| 288 |
main (int argc, char **argv, char **envp) |
| 289 |
{ |
| 290 |
set_identity (argv[0]); |
| 291 |
log_to (LOGTO_STDERR); |
| 292 |
|
| 293 |
setlocale (LC_ALL, ""); |
| 294 |
bindtextdomain (PACKAGE, LOCALEDIR); |
| 295 |
textdomain (PACKAGE); |
| 296 |
|
| 297 |
parse_options (argc, argv, envp); |
| 298 |
|
| 299 |
if (show_version) |
| 300 |
{ |
| 301 |
printf (_("%s version %s (built %s %s, protocol %d.%d)\n"), get_identity (), |
| 302 |
VERSION, __DATE__, __TIME__, PROTOCOL_MAJOR, PROTOCOL_MINOR); |
| 303 |
printf (_("Built with kernel interface %s/%s.\n"), IFTYPE, IFSUBTYPE); |
| 304 |
printf (_ |
| 305 |
("Copyright (C) 2003 Marc Lehmann <vpe@plan9.de> and others.\n" |
| 306 |
"See the AUTHORS file for a complete list.\n\n" |
| 307 |
"vpe comes with ABSOLUTELY NO WARRANTY. This is free software,\n" |
| 308 |
"and you are welcome to redistribute it under certain conditions;\n" |
| 309 |
"see the file COPYING for details.\n")); |
| 310 |
|
| 311 |
return 0; |
| 312 |
} |
| 313 |
|
| 314 |
if (show_help) |
| 315 |
usage (0); |
| 316 |
|
| 317 |
make_names (); |
| 318 |
conf.read_config (false); |
| 319 |
|
| 320 |
if (generate_keys) |
| 321 |
{ |
| 322 |
RAND_load_file ("/dev/urandom", 1024); |
| 323 |
exit (keygen (generate_keys)); |
| 324 |
} |
| 325 |
|
| 326 |
if (kill_vped) |
| 327 |
exit (kill_other (kill_vped)); |
| 328 |
|
| 329 |
if (show_config) |
| 330 |
{ |
| 331 |
conf.print (); |
| 332 |
exit (0); |
| 333 |
} |
| 334 |
|
| 335 |
usage (1); |
| 336 |
} |
