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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "psktool-options.h"
#include <errno.h>
#include <error.h>
#include <getopt.h>
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#ifndef _WIN32
#include <unistd.h>
#endif /* !_WIN32 */
#include <limits.h>
struct psktool_options psktool_options;
static long
parse_number (const char *arg)
{
char *endptr = NULL;
errno = 0;
long result;
if (strncmp (arg, "0x", 2) == 0)
result = strtol (arg + 2, &endptr, 16);
else if (strncmp (arg, "0", 1) == 0
&& strspn (arg, "012345678") == strlen (optarg))
result = strtol (arg + 1, &endptr, 8);
else
result = strtol (arg, &endptr, 10);
if (errno != 0 || (endptr && *endptr != '\0'))
error (EXIT_FAILURE, errno, "'%s' is not a recognizable number.",
arg);
return result;
}
/* Long options. */
static const struct option long_options[] =
{
{ "debug", required_argument, 0, 'd' },
{ "keysize", required_argument, 0, 's' },
{ "username", required_argument, 0, 'u' },
{ "pskfile", required_argument, 0, 'p' },
{ "passwd", required_argument, 0, CHAR_MAX + 1 },
{ "version", optional_argument, 0, 'v' },
{ "help", no_argument, 0, 'h' },
{ "more-help", no_argument, 0, '!' },
{ 0, 0, 0, 0 }
};
int
process_options (int argc, char **argv)
{
struct psktool_options *opts = &psktool_options;
int opt;
while ((opt = getopt_long (argc, argv, "!d:hp:s:u:v:",
long_options, NULL)) != EOF)
switch (opt)
{
case '\0': /* Long option. */
break;
case 'd':
opts->present.debug = true;
opts->arg.debug = optarg;
opts->value.debug = parse_number(optarg);
opts->enabled.debug = true;
break;
case 's':
opts->present.keysize = true;
opts->arg.keysize = optarg;
opts->value.keysize = parse_number(optarg);
opts->enabled.keysize = true;
break;
case 'u':
opts->present.username = true;
opts->arg.username = optarg;
opts->enabled.username = true;
break;
case 'p':
case CHAR_MAX + 1: /* --passwd */
opts->present.pskfile = true;
opts->arg.pskfile = optarg;
opts->enabled.pskfile = true;
break;
case 'v':
opts->present.version = true;
opts->arg.version = optarg;
opts->enabled.version = true;
break;
case 'h':
opts->present.help = true;
opts->enabled.help = true;
break;
case '!':
opts->present.more_help = true;
opts->enabled.more_help = true;
break;
default:
usage (stderr, EXIT_FAILURE);
break;
}
if (HAVE_OPT(DEBUG) && OPT_VALUE_DEBUG < 0)
{
error (EXIT_FAILURE, 0, "%s option value %d is out of range.",
"debug", opts->value.debug);
}
if (HAVE_OPT(DEBUG) && OPT_VALUE_DEBUG > 9999)
{
error (EXIT_FAILURE, 0, "%s option value %d is out of range",
"debug", opts->value.debug);
}
if (HAVE_OPT(KEYSIZE) && OPT_VALUE_KEYSIZE < 0)
{
error (EXIT_FAILURE, 0, "%s option value %d is out of range.",
"keysize", opts->value.keysize);
}
if (HAVE_OPT(KEYSIZE) && OPT_VALUE_KEYSIZE > 512)
{
error (EXIT_FAILURE, 0, "%s option value %d is out of range",
"keysize", opts->value.keysize);
}
if (optind < argc)
{
error (EXIT_FAILURE, 0, "Command line arguments are not allowed.");
}
if (HAVE_OPT(HELP))
{
USAGE(0);
}
if (HAVE_OPT(MORE_HELP))
#ifdef _WIN32
{
USAGE(0);
}
#else /* _WIN32 */
{
pid_t pid;
int pfds[2];
if (pipe (pfds) < 0)
error (EXIT_FAILURE, errno, "pipe");
pid = fork ();
if (pid < 0)
error (EXIT_FAILURE, errno, "fork");
if (pid == 0)
{
close (pfds[0]);
dup2 (pfds[1], STDOUT_FILENO);
close (pfds[1]);
usage (stdout, 0);
}
else
{
const char *args[2];
const char *envvar;
close (pfds[1]);
dup2 (pfds[0], STDIN_FILENO);
close (pfds[0]);
envvar = secure_getenv ("PAGER");
if (!envvar || *envvar == '\0')
args[0] = "more";
else
args[0] = envvar;
args[1] = NULL;
execvp (args[0], (char * const *)args);
exit (EXIT_FAILURE);
}
}
#endif /* !_WIN32 */
if (HAVE_OPT(VERSION))
{
if (!OPT_ARG_VERSION || !strcmp (OPT_ARG_VERSION, "c"))
{
const char str[] =
"psktool 3.7.9\n"
"Copyright (C) 2000-2021 Free Software Foundation, and others\n"
"This is free software. It is licensed for use, modification and\n"
"redistribution under the terms of the GNU General Public License,\n"
"version 3 or later <http://gnu.org/licenses/gpl.html>\n"
"\n"
"Please send bug reports to: <bugs@gnutls.org> \n";
fprintf (stdout, "%s", str);
exit(0);
}
else if (!strcmp (OPT_ARG_VERSION, "v"))
{
const char str[] =
"psktool 3.7.9\n";
fprintf (stdout, "%s", str);
exit(0);
}
else if (!strcmp (OPT_ARG_VERSION, "n"))
{
const char str[] =
"psktool 3.7.9\n"
"Copyright (C) 2000-2021 Free Software Foundation, and others\n"
"This is free software. It is licensed for use, modification and\n"
"redistribution under the terms of the GNU General Public License,\n"
"version 3 or later <http://gnu.org/licenses/gpl.html>\n"
"\n"
"gnutls is free software: you can redistribute it and/or\n"
"modify it under the terms of the GNU General Public License\n"
"as published by the Free Software Foundation,\n"
"either version 3 of the License, or (at your option) any later version.\n"
"\n"
"gnutls is distributed in the hope that it will be useful,\n"
"but WITHOUT ANY WARRANTY; without even the implied warranty\n"
"of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
"See the GNU General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU General Public License\n"
"along with this program. If not, see <http://www.gnu.org/licenses/>.\n"
"\n"
"Please send bug reports to: <bugs@gnutls.org> \n";
fprintf (stdout, "%s", str);
exit(0);
}
else
{
error (EXIT_FAILURE, 0,
"version option argument 'a' invalid. Use:\n"
" 'v' - version only\n"
" 'c' - version and copyright\n"
" 'n' - version and full copyright notice");
}
}
return optind;
}
void
usage (FILE *out, int status)
{
const char str[] =
"psktool - GnuTLS PSK tool\n"
"Usage: psktool [ -<flag> [<val>] | --<name>[{=| }<val>] ]... \n"
"\n"
"None:\n"
"\n"
" -d, --debug=num Enable debugging\n"
" - it must be in the range:\n"
" 0 to 9999\n"
" -s, --keysize=num Specify the key size in bytes (default is 32-bytes or 256-bits)\n"
" - it must be in the range:\n"
" 0 to 512\n"
" -u, --username=str Specify the username to use\n"
" -p, --pskfile=str Specify a pre-shared key file\n"
"\n"
"Version, usage and configuration options:\n"
"\n"
" -v, --version[=arg] output version information and exit\n"
" -h, --help display extended usage information and exit\n"
" -!, --more-help extended usage information passed thru pager\n"
"\n"
"Options are specified by doubled hyphens and their name or by a single\n"
"hyphen and the flag character.\n"
"\n"
"Program that generates random keys for use with TLS-PSK. The\n"
"keys are stored in hexadecimal format in a key file.\n"
"\n"
"Please send bug reports to: <bugs@gnutls.org>\n"
"\n";
fprintf (out, "%s", str);
exit (status);
}
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