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#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdint.h>
#define PROGRAM "PW-Inspector"
#define VERSION "v0.2"
#define EMAIL "vh@thc.org"
#define WEB "https://github.com/vanhauser-thc/thc-hydra"
#define MAXLENGTH 256
char *prg;
void help() {
printf("%s %s (c) 2005 by van Hauser / THC %s [%s]\n\n", PROGRAM, VERSION, EMAIL, WEB);
printf("Syntax: %s [-i FILE] [-o FILE] [-m MINLEN] [-M MAXLEN] [-c MINSETS] -l -u -n -p -s\n\n", prg);
printf("Options:\n");
printf(" -i FILE file to read passwords from (default: stdin)\n");
printf(" -o FILE file to write valid passwords to (default: stdout)\n");
printf(" -m MINLEN minimum length of a valid password\n");
printf(" -M MAXLEN maximum length of a valid password\n");
printf(" -c MINSETS the minimum number of sets required (default: all given)\n");
printf("Sets:\n");
printf(" -l lowcase characters (a,b,c,d, etc.)\n");
printf(" -u upcase characters (A,B,C,D, etc.)\n");
printf(" -n numbers (1,2,3,4, etc.)\n");
printf(" -p printable characters (which are not -l/-n/-p, e.g. $,!,/,(,*, etc.)\n");
printf(" -s special characters - all others not withint the sets above\n");
printf("\n%s reads passwords in and prints those which meet the requirements.\n", PROGRAM);
printf("The return code is the number of valid passwords found, 0 if none was found.\n");
printf("Use for security: check passwords, if 0 is returned, reject password choice.\n");
printf("Use for hacking: trim your dictionary file to the pw requirements of the target.\n");
printf("Usage only allowed for legal purposes.\n");
exit(-1);
}
int main(int argc, char *argv[]) {
int32_t i, j, k;
int32_t sets = 0, countsets = 0, minlen = 0, maxlen = MAXLENGTH, count = 0;
int32_t set_low = 0, set_up = 0, set_no = 0, set_print = 0, set_other = 0;
FILE *in = stdin, *out = stdout;
char buf[MAXLENGTH + 1];
prg = argv[0];
if (argc < 2)
help();
while ((i = getopt(argc, argv, "i:o:m:M:c:lunps")) >= 0) {
switch (i) {
case 'i':
if ((in = fopen(optarg, "r")) == NULL) {
fprintf(stderr, "Error: unable to open input file %s\n", optarg);
exit(-1);
}
break;
case 'o':
if ((out = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "Error: unable to open output file %s\n", optarg);
exit(-1);
}
break;
case 'm':
minlen = atoi(optarg);
break;
case 'M':
maxlen = atoi(optarg);
break;
case 'c':
countsets = atoi(optarg);
break;
case 'l':
if (set_low == 0) {
set_low = 1;
sets++;
}
break;
case 'u':
if (set_up == 0) {
set_up = 1;
sets++;
}
break;
case 'n':
if (set_no == 0) {
set_no = 1;
sets++;
}
break;
case 'p':
if (set_print == 0) {
set_print = 1;
sets++;
}
break;
case 's':
if (set_other == 0) {
set_other = 1;
sets++;
}
break;
default:
help();
}
}
if (minlen > maxlen) {
fprintf(stderr, "Error: -m MINLEN is greater than -M MAXLEN\n");
exit(-1);
}
if (countsets > sets) {
fprintf(stderr, "Error: -c MINSETS is larger than the sets defined\n");
exit(-1);
}
if (countsets == 0)
countsets = sets;
while (fgets(buf, sizeof(buf), in) != NULL) {
i = -1;
if (buf[0] == 0)
continue;
if (buf[strlen(buf) - 1] == '\n')
buf[strlen(buf) - 1] = 0;
if (strlen(buf) >= minlen && strlen(buf) <= maxlen) {
i = 0;
if (countsets > 0) {
if (set_low)
if (strpbrk(buf, "abcdefghijklmnopqrstuvwxyz") != NULL)
i++;
if (set_up)
if (strpbrk(buf, "ABCDEFGHIJKLMNOPQRSTUVWXYZ") != NULL)
i++;
if (set_no)
if (strpbrk(buf, "0123456789") != NULL)
i++;
if (set_print) {
j = 0;
for (k = 0; k < strlen(buf); k++)
if (isprint((int32_t) buf[k]) != 0 && isalnum((int32_t) buf[k]) == 0)
j = 1;
if (j)
i++;
}
if (set_other) {
j = 0;
for (k = 0; k < strlen(buf); k++)
if (isprint((int32_t) buf[k]) == 0 && isalnum((int32_t) buf[k]) == 0)
j = 1;
if (j)
i++;
}
}
if (i >= countsets) {
fprintf(out, "%s\n", buf);
count++;
}
}
/* fprintf(stderr, "[DEBUG] i: %d minlen: %d maxlen: %d len: %d\n", i, minlen, maxlen, strlen(buf)); */
}
fclose(in);
fclose(out);
return count;
}
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