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/*
* pwgen.c --- generate secure passwords
*
* Copyright (C) 2001 by Theodore Ts'o
*
* This file may be distributed under the terms of the GNU Public
* License.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#include "pwgen.h"
struct pwgen_func generators[] = {
{ "phonemes", pw_phonemes, 0 },
{ "rand", pw_rand, 0 },
{ 0, 0, 0 }
};
/* Program parameters set via getopt */
int pw_length = 8;
int num_pw = -1;
int case_flag = 0;
int numeric_flag = 0;
int do_columns = 0;
#ifdef HAVE_GETOPT_LONG
struct option pwgen_options[] = {
{ "alt-phonics", no_argument, 0, 'a' },
{ "capitalize", no_argument, 0, 'c' },
{ "numerals", no_argument, 0, 'n'},
{ "num-passwords", required_argument, 0, 'N'},
{ "secure", no_argument, 0, 's' },
{ "help", no_argument, 0, 'h'},
{ "no-numerals", no_argument, &numeric_flag, 0 },
{ "no-capitalize", no_argument, &case_flag, 0 },
{ 0, 0, 0, 0}
};
#endif
const char *usage_msg =
"Usage: pwgen [ OPTIONS ] [ pw_length ] [ num_pw ]\n\n"
"Options supported by pwgen:\n"
" -c or -capitalize\n"
"\tInclude at least one capital letter in the password\n"
" -n or --numerals\n"
"\tInclude at least one number in the password\n"
" -s or --secure\n"
"\tGenerate completely random passwords\n"
" -h or --help\n"
"\tPrint a help message\n"
" --no-numerals, --no-capitalize\n"
"\tDon't include a number or capital letter in the password\n"
" -C\n\tPrint the generated passwords in columns\n"
" -1\n\tDon't print the generated passwords in columns\n"
;
void usage(void)
{
fprintf(stderr, usage_msg);
exit(1);
}
int main(int argc, char **argv)
{
int term_width = 80;
int c, i, num_cols;
char *buf, *tmp;
void (*pwgen)(char *buf, int size, int pw_flags);
pwgen = pw_phonemes;
if (isatty(1)) {
do_columns = 1;
case_flag = PW_ONE_CASE;
numeric_flag = PW_ONE_NUMBER;
}
while (1) {
#ifdef HAVE_GETOPT_LONG
c = getopt_long(argc, argv, "1aCcnN:sh", pwgen_options, 0);
#else
c = getopt(argc, argv, "1aCcnN:sh");
#endif
if (c == -1)
break;
switch (c) {
case 'a':
break;
case 'c':
case_flag = PW_ONE_CASE;
break;
case 'n':
numeric_flag = PW_ONE_NUMBER;
break;
case 'N':
num_pw = strtol(optarg, &tmp, 0);
if (*tmp) {
fprintf(stderr,
"Invalid number of passwords: %s\n",
optarg);
exit(1);
}
break;
case 's':
pwgen = pw_rand;
break;
case 'C':
do_columns = 1;
break;
case '1':
do_columns = 0;
break;
case 'h':
case '?':
usage();
break;
}
}
if (optind < argc) {
pw_length = strtol(argv[optind], &tmp, 0);
if (*tmp) {
fprintf(stderr, "Invalid password length: %s\n",
argv[optind]);
exit(1);
}
optind++;
}
if (optind < argc) {
num_pw = strtol(argv[optind], &tmp, 0);
if (*tmp) {
fprintf(stderr, "Invalid number of passwords: %s\n",
argv[optind]);
exit(1);
}
}
if (do_columns)
num_cols = term_width / (pw_length+1);
if (num_pw < 0)
num_pw = do_columns ? num_cols * 20 : 1;
buf = malloc(pw_length+1);
if (!buf) {
fprintf(stderr, "Couldn't malloc password buffer.\n");
exit(1);
}
for (i=0; i < num_pw; i++) {
pwgen(buf, pw_length, case_flag | numeric_flag);
if (!do_columns || ((i % num_cols) == (num_cols-1)))
printf("%s\n", buf);
else
printf("%s ", buf);
}
if ((i % num_cols) != 0 && (num_cols > 1))
fputc('\n', stdout);
free(buf);
}
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