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/*
# This program was written by and is copyright Alec Muffett 1991,
# 1992, 1993, 1994, 1995, and 1996, and is provided as part of the
# Crack v5.0 Password Cracking package.
#
# The copyright holder disclaims all responsibility or liability with
# respect to its usage or its effect upon hardware or computer
# systems, and maintains copyright as set out in the "LICENCE"
# document which accompanies distributions of Crack v5.0 and upwards.
*/
#include <stdio.h>
#include <stdlib.h>
#define MAXLEN 64
char *cipher;
char *pwset[MAXLEN];
char pwbuffer[MAXLEN];
void
brute(int charno, int length)
{
char *p;
int doit;
if (charno == (length - 1))
{
doit = 1;
}
else
{
doit = 0;
}
pwbuffer[charno + 1] = '\0';
if (!pwset[charno])
{
fprintf(stderr, "wtf?\n");
exit(1);
}
for (p = pwset[charno]; *p; p++)
{
pwbuffer[charno] = *p;
if (doit)
{
#if BRUTEGEN
printf("%s\n", pwbuffer);
#else
if (!strcmp(cipher, (char *) crypt(pwbuffer, cipher)))
{
printf("brute: guessed %s == '%s'\n", cipher, pwbuffer);
exit(0);
}
#endif
}
else
{
brute(charno + 1, length);
}
}
}
char *
expand(char *string)
{
int i;
int j;
char *c;
char *retval;
int a;
int b;
char block[256]; /* std crypt() is restricted to 128, bwtf. md5 aint. */
for (i = 0; i < 256; i++)
{
block[i] = '\0';
}
c = string;
while (*c)
{
i = 0;
j = -1;
if ((*c == '\\') && c[1])
{
c++;
i = *c & 0xff;
c++;
} else
{
i = *c & 0xff;
c++;
}
if (*c == '-' && c[1])
{
c++;
if ((*c == '\\') && c[1])
{
c++;
j = *c & 0xff;
c++;
} else
{
j = *c & 0xff;
c++;
}
}
if (i < j)
{
while (i <= j)
{
block[i++] = 1;
}
}
else
{
block[i] = 1;
}
}
j = 0;
for (i = 0; i < 256; i++)
{
if (block[i])
{
j++;
}
}
if (!j)
{
fprintf(stderr, "brute: cannot permit empty set: %s\n", string);
exit(1);
}
c = retval = malloc(j + 1);
for (i = 0; i < 256; i++)
{
if (block[i])
{
*(c++) = i;
}
}
*c = '\0';
return retval;
}
/* brute ciphertext '[set]' ... */
main(int argc, char **argv)
{
int i;
int j;
#if BRUTEGEN
if (argc < 2)
{
fprintf(stderr, "Usage:\t%s charset ...\n", argv[0]);
exit(1);
}
i = 1;
#else
if (argc < 3)
{
fprintf(stderr, "Usage:\t%s ciphertext charset ...\n", argv[0]);
exit(1);
}
cipher = argv[1];
fprintf(stderr, "brute: ciphertext: %s\n", cipher);
i = 2;
#endif
j = 0;
while ((i < argc) && (i < (MAXLEN - 1)))
{
fprintf(stderr, "brute: set %d: %s -> ", j, argv[i]);
pwset[j] = expand(argv[i]);
fprintf(stderr, "'%s'\n", pwset[j]);
i++;
j++;
}
pwset[j] = (char *) 0;
brute(0, j);
#if BRUTEGEN
exit(0);
#else
exit(1); /* if cracking, exit with error unless cracked */
#endif
}
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