fcrackzip/main.c

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STDBOOL_H
#include <stdbool.h>
#else
typedef enum { FALSE = 0, TRUE = 1 } bool;
#endif
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
#include "getopt.h"
#endif
#ifdef HAVE_GETTIMEOFDAY
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#endif

#include <string.h>

#ifdef USE_UNIX_REDIRECTION
#define DEVNULL ">/dev/null 2>&1"
#else
#define DEVNULL ">NUL 2>&1"
#endif

#include "crack.h"

int use_unzip;

static method *crack_method = methods;
static int method_number = -1;
static int min_length = -1;
static int max_length = -1;
static int residuent = 0;
static int modul = 1;

static FILE *dict_file;

int REGPARAM
check_unzip (const char *pw)
{
  char buff[1024];
  int status;

  sprintf (buff, "unzip -qqtP \"%s\" %s " DEVNULL, pw, file_path[0]);
  status = system (buff);

#undef REDIR

  if (status == EXIT_SUCCESS)
    {
      printf("\n\nPASSWORD FOUND!!!!: pw == %s\n", pw);
      exit (EXIT_SUCCESS);
    }

  return !status;
}

/* misc. callbacks.  */

static int
false_callback (const char *pw, const char *info)
{
  (void) pw;
  (void) info;                        /* suppress warning */
  return 0;
}

static int
true_callback (const char *pw, const char *info)
{
  (void) pw;
  (void) info;                        /* suppress warning */
  return 1;
}

static int
print_callback (const char *pw, const char *info)
{
  if (!use_unzip || check_unzip (pw))
    {
      printf ("possible pw found: %s (%s)\n", pw, info ? info : "");
      /*exit(0); */
    }

  return 0;
}

static int
brute_force_gen (void)
{
  u8 *p = pw_end;

  do
    {
      u8 o = *--p;
      *p = bf_next[o];
      if (o != bf_last)
        return pw_end - p;
    }
  while (p > pw);

  if (pw_end - pw < max_length)
    {
      p = ++pw_end;
      *p = 0;

      while (p > pw)
        *--p = bf_next[255];

      return -1;
    }
  else
    return 0;
}

static int
dictionary_gen (void)
{
  /* should optimize this, comparing prefixes would be a net win.
   * however, not using fgets but something better might be an
   * even higher win :(
   */
  if (fgets (pw, MAX_PW+1, dict_file))
    {
      pw[strlen (pw) - 1] = 0;
      return -1;
    }
  else
    {
      if (!feof (dict_file))
        perror ("dictionary_read_next_password");

      return 0;
    }
}

static int
validate_gen (void)
{
  return 0;
}

static void
validate (void)
{
  u8 header[HEADER_SIZE + 1] =
  {0xf4, 0x28, 0xd6, 0xee, 0xd7, 0xd2,
   0x3c, 0x1a, 0x20, 0xab, 0xdf, 0x73,
   0xd6, 0xba, 0};                /* PW: "Martha" */
  strcpy ((char *) files, (char *) header);        /* yeah, dirty... */
  file_count = 1;

  if (crack_method->desc[0] == 'z')
    {
      crack_method->init_crack_pw ();

      strcpy (pw, "Martha");
      if (crack_method->crack_pw (validate_gen, true_callback))
        printf ("validate ok (%s == Martha)\n", pw);
      else
        printf ("validation error (%s != Martha)\n", pw);
    }
  else
    printf ("validate only works for zip methods, use --method to select one.\n");
}

static void
parse_charset (char *cs)
{
  u8 chars[800];
  u8 map[256];
  u8 *p = chars;

  while (*cs)
    switch (*cs++)
      {
      case 'a':
        strcpy ((char *) p, "abcdefghijklmnopqrstuvwxyz");
        p += 26;
        break;

      case 'A':
        strcpy ((char *) p, "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
        p += 26;
        break;

      case '1':
        strcpy ((char *) p, "0123456789");
        p += 10;
        break;

      case '!':
        strcpy ((char *) p, "!:$%&/()=?{[]}+-*~#");
        p += 18;
        break;

      case ':':
        while (*cs)
          *p++ = *cs++;
        break;

      default:
        fprintf (stderr, "unknown charset specifier, only 'aA1!:' recognized\n");
        exit (1);
      }

  *p = 0;

  p = chars;
  bf_last = *p++;
  memset (bf_next, bf_last, sizeof bf_next);
  memset (map, 0, 256);

  for (; *p; p++)
    if (!map[*p])
      {
        map[*p] = 1;
        bf_next[bf_last] = *p;
        bf_last = *p;
      }

  bf_next[bf_last] = chars[0];

/*  { int i; for (i = 0; i < 255; i++) printf ("bf_next [%3d] = %3d\n", i, bf_next[i]);}; */
}

static int benchmark_count;

static int
benchmark_gen (void)
{
  if (!--benchmark_count)
    return 0;

  return brute_force_gen ();
}

static void
benchmark (void)
{
#ifdef HAVE_GETTIMEOFDAY
  int i;
  long j, k;
  struct timeval tv1, tv2;

  do
    {
      for (i = 0; i < HEADER_SIZE * 3; i++)
        files[i] = i ^ (i * 3);

      file_count = 3;
      strcpy (pw, "abcdefghij");
      parse_charset ("a");
      benchmark_count = BENCHMARK_LOOPS;

      verbosity = 0;

      printf ("%c%s: ",
              (crack_method - methods == default_method) ? '*' : ' ',
              crack_method->desc);

      if (strncmp ("zip", crack_method->desc, 3))
        printf ("(skipped)");
      else
        {
          fflush (stdout);

          crack_method->init_crack_pw ();
          gettimeofday (&tv1, 0);
          crack_method->crack_pw (benchmark_gen, false_callback);
          gettimeofday (&tv2, 0);
          tv2.tv_sec -= tv1.tv_sec;
          tv2.tv_usec -= tv1.tv_usec;

          j = tv2.tv_sec * 1000000 + tv2.tv_usec;
          k = BENCHMARK_LOOPS;

          printf ("cracks/s = ");

          for (i = 7; i--;)
            printf ("%ld", k / j), k = (k - k / j * j) * 10;
        }

      printf ("\n");
      crack_method++;
    }
  while (method_number < 0 && crack_method->desc);
#else
  fprintf (stderr, "This executable was compiled without support for benchmarking\n");
  exit (1);
#endif
}

static void
usage (int ec)
{
  printf ("\n"
          PACKAGE " version " VERSION ", a fast/free zip password cracker\n"
          "written by Marc Lehmann <pcg@goof.com> You can find more info on\n"
          "http://www.goof.com/pcg/marc/\n"
          "\n"
          "USAGE: fcrackzip\n"
          "          [-b|--brute-force]            use brute force algorithm\n"
          "          [-D|--dictionary]             use a dictionary\n"
          "          [-B|--benchmark]              execute a small benchmark\n"
          "          [-c|--charset characterset]   use characters from charset\n"
          "          [-h|--help]                   show this message\n"
          "          [--version]                   show the version of this program\n"
          "          [-V|--validate]               sanity-check the algortihm\n"
          "          [-v|--verbose]                be more verbose\n"
          "          [-p|--init-password string]   use string as initial password/file\n"
          "          [-l|--length min-max]         check password with length min to max\n"
          "          [-u|--use-unzip]              use unzip to weed out wrong passwords\n"
          "          [-m|--method num]             use method number \"num\" (see below)\n"
          "          [-2|--modulo r/m]             only calculcate 1/m of the password\n"
          "          file...                       the zipfiles to crack\n"
          "\n"
    );

  printf ("methods compiled in (* = default):\n\n");
  for (crack_method = methods; crack_method->desc; crack_method++)
    printf ("%c%d: %s\n",
            (crack_method - methods == default_method) ? '*' : ' ',
            crack_method - methods,
            crack_method->desc);

  printf ("\n");
  exit (ec);
}

static struct option options[] =
{
  {"version", no_argument, 0, 'R'},
  {"brute-force", no_argument, 0, 'b'},
  {"dictionary", no_argument, 0, 'D'},
  {"benchmark", no_argument, 0, 'B'},
  {"charset", required_argument, 0, 'c'},
  {"help", no_argument, 0, 'h'},
  {"validate", no_argument, 0, 'V'},
  {"verbose", no_argument, 0, 'v'},
  {"init-password", required_argument, 0, 'p'},
  {"length", required_argument, 0, 'l'},
  {"use-unzip", no_argument, 0, 'u'},
  {"method", required_argument, 0, 'm'},
  {"modulo", required_argument, 0, 2},
  {0, 0, 0, 0},
};

int
main (int argc, char *argv[])
{
  int c;
  int option_index = 0;
  char *charset = "aA1!";
  enum { m_benchmark, m_brute_force, m_dictionary } mode = m_brute_force;

  while ((c = getopt_long (argc, argv, "DbBc:hVvp:l:um:2:", options, &option_index)) != -1)
    switch (c)
      {
      case 'b':
        mode = m_brute_force;
        break;

      case 'D':
        mode = m_dictionary;
        break;

      case 'p':
        if (strlen (optarg) > MAX_PW)
          {
            fprintf (stderr, "'%s' is too long: passwords longer than %d characters not supported\n", optarg, MAX_PW);
            exit (1);
          }

        strcpy (pw, optarg);
        break;

      case 'l':
        pw[0] = 0;
        switch (sscanf (optarg, "%d-%d", &min_length, &max_length))
          {
          default:
            fprintf (stderr, "'%s' is an incorrect length specification\n", optarg);
            exit (1);
          case 1:
            max_length = min_length;
          case 2:
            ;
          }
        break;

      case 2:
        if (sscanf (optarg, "%d/%d", &residuent, &modul) != 2)
          fprintf (stderr, "malformed --modulo option, expected 'residuent/modul'\n"), exit (1);

        if (residuent < 0 || modul <= 0)
          fprintf (stderr, "residuent and modul must be positive\n"), exit (1);

        if (residuent >= modul)
          fprintf (stderr, "residuent must be less than modul\n"), exit (1);

        break;

      case 'B':
        mode = m_benchmark;
        benchmark ();
        exit (0);

      case 'v':
        verbosity++;
        break;

      case 'm':
        {
          for (method_number = 0; methods[method_number].desc; method_number++)
            if (!strncmp (methods[method_number].desc, optarg, strlen (optarg)))
              break;

          if (!methods[method_number].desc)
            method_number = atoi (optarg);

          crack_method = methods + method_number;
        }
        break;

      case 'V':
        validate ();
        exit (0);

      case 'c':
        charset = optarg;
        break;

      case 'u':
        use_unzip = 1;
        break;

      case 'h':
        usage (0);
      case 'R':
        printf (PACKAGE " version " VERSION "\n");
        exit (0);

      case ':':
        fprintf (stderr, "required argument missing\n");
        exit (1);

      case '?':
        fprintf (stderr, "unknown option\n");
        exit (1);

      default:
        usage (1);
      }

  if (method_number < 0)
    {
      method_number = default_method;
      crack_method = methods + default_method;
    }

  if (optind >= argc)
    {
      fprintf (stderr, "you have to specify one or more zip files (try --help)\n");
      exit (1);
    }

  for (; optind < argc; optind++)
    if (file_count < MAX_FILES)
      crack_method->load_file (argv[optind]);
    else if (verbosity)
      printf ("%d file maximum reached, ignoring '%s'\n", MAX_FILES, argv[optind]);

  if (file_count == 0)
    {
      fprintf (stderr, "no usable files found\n");
      exit (1);
    }

  crack_method->init_crack_pw ();

  switch (mode)
    {
    case m_brute_force:
      parse_charset (charset);

      if (!pw[0])
        {
          if (min_length < 0)
            {
              fprintf (stderr, "you have to specify either --init-password or --length with --brute-force\n");
              exit (1);
            }
          else
            {
              u8 *p = pw;
              while (p < pw + min_length)
                *p++ = bf_next[255];

              *p++ = 0;
            }
        }

      if (residuent)
        {
          int xmodul = modul;
          modul = residuent;
          pw_end = pw + strlen (pw);
          brute_force_gen ();
          printf ("%s\n", pw);
          modul = xmodul;
          printf ("WARNING: residuent mode NOT supported YET!\n");
        }

      crack_method->crack_pw (brute_force_gen, print_callback);
      break;

    case m_dictionary:
      if (!pw[0])
        {
          fprintf (stderr, "you have to specify a file to read passwords from using the -p switch\n");
          exit (1);
        }

      if (!(dict_file = fopen (pw, "r")))
        {
          perror (pw);
          exit (1);
        }
      else
        {
          *(pw_end = pw) = 0;
          dictionary_gen (); /* fetch first password */
          crack_method->crack_pw (dictionary_gen, print_callback);

          fclose (dict_file);
        }

      break;

    default:
      fprintf (stderr, "specified mode not supported in this version\n");
      exit (1);
    }

  return 0;
}
Revision:	1.3
Committed:	Sun Jun 20 13:13:45 2010 UTC (13 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.2:	+1 -1 lines
Log Message:	* empty log message *
#	Content
1	#ifdef HAVE_CONFIG_H
2	#include "config.h"
3	#endif
4
5	#include <stdio.h>
6	#include <stdlib.h>
7	#ifdef HAVE_STDBOOL_H
8	#include <stdbool.h>
9	#else
10	typedef enum { FALSE = 0, TRUE = 1 } bool;
11	#endif
12	#ifdef HAVE_GETOPT_H
13	#include <getopt.h>
14	#else
15	#include "getopt.h"
16	#endif
17	#ifdef HAVE_GETTIMEOFDAY
18	#ifdef HAVE_UNISTD_H
19	#include <unistd.h>
20	#endif
21	#ifdef HAVE_SYS_TIME_H
22	#include <sys/time.h>
23	#endif
24	#endif
25
26	#include <string.h>
27
28	#ifdef USE_UNIX_REDIRECTION
29	#define DEVNULL ">/dev/null 2>&1"
30	#else
31	#define DEVNULL ">NUL 2>&1"
32	#endif
33
34	#include "crack.h"
35
36	int use_unzip;
37
38	static method *crack_method = methods;
39	static int method_number = -1;
40	static int min_length = -1;
41	static int max_length = -1;
42	static int residuent = 0;
43	static int modul = 1;
44
45	static FILE *dict_file;
46
47	int REGPARAM
48	check_unzip (const char *pw)
49	{
50	char buff[1024];
51	int status;
52
53	sprintf (buff, "unzip -qqtP \"%s\" %s " DEVNULL, pw, file_path[0]);
54	status = system (buff);
55
56	#undef REDIR
57
58	if (status == EXIT_SUCCESS)
59	{
60	printf("\n\nPASSWORD FOUND!!!!: pw == %s\n", pw);
61	exit (EXIT_SUCCESS);
62	}
63
64	return !status;
65	}
66
67	/* misc. callbacks. */
68
69	static int
70	false_callback (const char pw, const char info)
71	{
72	(void) pw;
73	(void) info; /* suppress warning */
74	return 0;
75	}
76
77	static int
78	true_callback (const char pw, const char info)
79	{
80	(void) pw;
81	(void) info; /* suppress warning */
82	return 1;
83	}
84
85	static int
86	print_callback (const char pw, const char info)
87	{
88	if (!use_unzip \|\| check_unzip (pw))
89	{
90	printf ("possible pw found: %s (%s)\n", pw, info ? info : "");
91	/exit(0); /
92	}
93
94	return 0;
95	}
96
97	static int
98	brute_force_gen (void)
99	{
100	u8 *p = pw_end;
101
102	do
103	{
104	u8 o = *--p;
105	*p = bf_next[o];
106	if (o != bf_last)
107	return pw_end - p;
108	}
109	while (p > pw);
110
111	if (pw_end - pw < max_length)
112	{
113	p = ++pw_end;
114	*p = 0;
115
116	while (p > pw)
117	*--p = bf_next[255];
118
119	return -1;
120	}
121	else
122	return 0;
123	}
124
125	static int
126	dictionary_gen (void)
127	{
128	/* should optimize this, comparing prefixes would be a net win.
129	* however, not using fgets but something better might be an
130	* even higher win :(
131	*/
132	if (fgets (pw, MAX_PW+1, dict_file))
133	{
134	pw[strlen (pw) - 1] = 0;
135	return -1;
136	}
137	else
138	{
139	if (!feof (dict_file))
140	perror ("dictionary_read_next_password");
141
142	return 0;
143	}
144	}
145
146	static int
147	validate_gen (void)
148	{
149	return 0;
150	}
151
152	static void
153	validate (void)
154	{
155	u8 header[HEADER_SIZE + 1] =
156	{0xf4, 0x28, 0xd6, 0xee, 0xd7, 0xd2,
157	0x3c, 0x1a, 0x20, 0xab, 0xdf, 0x73,
158	0xd6, 0xba, 0}; /* PW: "Martha" */
159	strcpy ((char ) files, (char ) header); /* yeah, dirty... */
160	file_count = 1;
161
162	if (crack_method->desc[0] == 'z')
163	{
164	crack_method->init_crack_pw ();
165
166	strcpy (pw, "Martha");
167	if (crack_method->crack_pw (validate_gen, true_callback))
168	printf ("validate ok (%s == Martha)\n", pw);
169	else
170	printf ("validation error (%s != Martha)\n", pw);
171	}
172	else
173	printf ("validate only works for zip methods, use --method to select one.\n");
174	}
175
176	static void
177	parse_charset (char *cs)
178	{
179	u8 chars[800];
180	u8 map[256];
181	u8 *p = chars;
182
183	while (*cs)
184	switch (*cs++)
185	{
186	case 'a':
187	strcpy ((char *) p, "abcdefghijklmnopqrstuvwxyz");
188	p += 26;
189	break;
190
191	case 'A':
192	strcpy ((char *) p, "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
193	p += 26;
194	break;
195
196	case '1':
197	strcpy ((char *) p, "0123456789");
198	p += 10;
199	break;
200
201	case '!':
202	strcpy ((char ) p, "!:$%&/()=?{[]}+-~#");
203	p += 18;
204	break;
205
206	case ':':
207	while (*cs)
208	p++ = cs++;
209	break;
210
211	default:
212	fprintf (stderr, "unknown charset specifier, only 'aA1!:' recognized\n");
213	exit (1);
214	}
215
216	*p = 0;
217
218	p = chars;
219	bf_last = *p++;
220	memset (bf_next, bf_last, sizeof bf_next);
221	memset (map, 0, 256);
222
223	for (; *p; p++)
224	if (!map[*p])
225	{
226	map[*p] = 1;
227	bf_next[bf_last] = *p;
228	bf_last = *p;
229	}
230
231	bf_next[bf_last] = chars[0];
232
233	/* { int i; for (i = 0; i < 255; i++) printf ("bf_next [%3d] = %3d\n", i, bf_next[i]);}; */
234	}
235
236	static int benchmark_count;
237
238	static int
239	benchmark_gen (void)
240	{
241	if (!--benchmark_count)
242	return 0;
243
244	return brute_force_gen ();
245	}
246
247	static void
248	benchmark (void)
249	{
250	#ifdef HAVE_GETTIMEOFDAY
251	int i;
252	long j, k;
253	struct timeval tv1, tv2;
254
255	do
256	{
257	for (i = 0; i < HEADER_SIZE * 3; i++)
258	files[i] = i ^ (i * 3);
259
260	file_count = 3;
261	strcpy (pw, "abcdefghij");
262	parse_charset ("a");
263	benchmark_count = BENCHMARK_LOOPS;
264
265	verbosity = 0;
266
267	printf ("%c%s: ",
268	(crack_method - methods == default_method) ? '*' : ' ',
269	crack_method->desc);
270
271	if (strncmp ("zip", crack_method->desc, 3))
272	printf ("(skipped)");
273	else
274	{
275	fflush (stdout);
276
277	crack_method->init_crack_pw ();
278	gettimeofday (&tv1, 0);
279	crack_method->crack_pw (benchmark_gen, false_callback);
280	gettimeofday (&tv2, 0);
281	tv2.tv_sec -= tv1.tv_sec;
282	tv2.tv_usec -= tv1.tv_usec;
283
284	j = tv2.tv_sec * 1000000 + tv2.tv_usec;
285	k = BENCHMARK_LOOPS;
286
287	printf ("cracks/s = ");
288
289	for (i = 7; i--;)
290	printf ("%ld", k / j), k = (k - k / j * j) * 10;
291	}
292
293	printf ("\n");
294	crack_method++;
295	}
296	while (method_number < 0 && crack_method->desc);
297	#else
298	fprintf (stderr, "This executable was compiled without support for benchmarking\n");
299	exit (1);
300	#endif
301	}
302
303	static void
304	usage (int ec)
305	{
306	printf ("\n"
307	PACKAGE " version " VERSION ", a fast/free zip password cracker\n"
308	"written by Marc Lehmann <pcg@goof.com> You can find more info on\n"
309	"http://www.goof.com/pcg/marc/\n"
310	"\n"
311	"USAGE: fcrackzip\n"
312	" [-b\|--brute-force] use brute force algorithm\n"
313	" [-D\|--dictionary] use a dictionary\n"
314	" [-B\|--benchmark] execute a small benchmark\n"
315	" [-c\|--charset characterset] use characters from charset\n"
316	" [-h\|--help] show this message\n"
317	" [--version] show the version of this program\n"
318	" [-V\|--validate] sanity-check the algortihm\n"
319	" [-v\|--verbose] be more verbose\n"
320	" [-p\|--init-password string] use string as initial password/file\n"
321	" [-l\|--length min-max] check password with length min to max\n"
322	" [-u\|--use-unzip] use unzip to weed out wrong passwords\n"
323	" [-m\|--method num] use method number \"num\" (see below)\n"
324	" [-2\|--modulo r/m] only calculcate 1/m of the password\n"
325	" file... the zipfiles to crack\n"
326	"\n"
327	);
328
329	printf ("methods compiled in (* = default):\n\n");
330	for (crack_method = methods; crack_method->desc; crack_method++)
331	printf ("%c%d: %s\n",
332	(crack_method - methods == default_method) ? '*' : ' ',
333	crack_method - methods,
334	crack_method->desc);
335
336	printf ("\n");
337	exit (ec);
338	}
339
340	static struct option options[] =
341	{
342	{"version", no_argument, 0, 'R'},
343	{"brute-force", no_argument, 0, 'b'},
344	{"dictionary", no_argument, 0, 'D'},
345	{"benchmark", no_argument, 0, 'B'},
346	{"charset", required_argument, 0, 'c'},
347	{"help", no_argument, 0, 'h'},
348	{"validate", no_argument, 0, 'V'},
349	{"verbose", no_argument, 0, 'v'},
350	{"init-password", required_argument, 0, 'p'},
351	{"length", required_argument, 0, 'l'},
352	{"use-unzip", no_argument, 0, 'u'},
353	{"method", required_argument, 0, 'm'},
354	{"modulo", required_argument, 0, 2},
355	{0, 0, 0, 0},
356	};
357
358	int
359	main (int argc, char *argv[])
360	{
361	int c;
362	int option_index = 0;
363	char *charset = "aA1!";
364	enum { m_benchmark, m_brute_force, m_dictionary } mode = m_brute_force;
365
366	while ((c = getopt_long (argc, argv, "DbBc:hVvp:l:um:2:", options, &option_index)) != -1)
367	switch (c)
368	{
369	case 'b':
370	mode = m_brute_force;
371	break;
372
373	case 'D':
374	mode = m_dictionary;
375	break;
376
377	case 'p':
378	if (strlen (optarg) > MAX_PW)
379	{
380	fprintf (stderr, "'%s' is too long: passwords longer than %d characters not supported\n", optarg, MAX_PW);
381	exit (1);
382	}
383
384	strcpy (pw, optarg);
385	break;
386
387	case 'l':
388	pw[0] = 0;
389	switch (sscanf (optarg, "%d-%d", &min_length, &max_length))
390	{
391	default:
392	fprintf (stderr, "'%s' is an incorrect length specification\n", optarg);
393	exit (1);
394	case 1:
395	max_length = min_length;
396	case 2:
397	;
398	}
399	break;
400
401	case 2:
402	if (sscanf (optarg, "%d/%d", &residuent, &modul) != 2)
403	fprintf (stderr, "malformed --modulo option, expected 'residuent/modul'\n"), exit (1);
404
405	if (residuent < 0 \|\| modul <= 0)
406	fprintf (stderr, "residuent and modul must be positive\n"), exit (1);
407
408	if (residuent >= modul)
409	fprintf (stderr, "residuent must be less than modul\n"), exit (1);
410
411	break;
412
413	case 'B':
414	mode = m_benchmark;
415	benchmark ();
416	exit (0);
417
418	case 'v':
419	verbosity++;
420	break;
421
422	case 'm':
423	{
424	for (method_number = 0; methods[method_number].desc; method_number++)
425	if (!strncmp (methods[method_number].desc, optarg, strlen (optarg)))
426	break;
427
428	if (!methods[method_number].desc)
429	method_number = atoi (optarg);
430
431	crack_method = methods + method_number;
432	}
433	break;
434
435	case 'V':
436	validate ();
437	exit (0);
438
439	case 'c':
440	charset = optarg;
441	break;
442
443	case 'u':
444	use_unzip = 1;
445	break;
446
447	case 'h':
448	usage (0);
449	case 'R':
450	printf (PACKAGE " version " VERSION "\n");
451	exit (0);
452
453	case ':':
454	fprintf (stderr, "required argument missing\n");
455	exit (1);
456
457	case '?':
458	fprintf (stderr, "unknown option\n");
459	exit (1);
460
461	default:
462	usage (1);
463	}
464
465	if (method_number < 0)
466	{
467	method_number = default_method;
468	crack_method = methods + default_method;
469	}
470
471	if (optind >= argc)
472	{
473	fprintf (stderr, "you have to specify one or more zip files (try --help)\n");
474	exit (1);
475	}
476
477	for (; optind < argc; optind++)
478	if (file_count < MAX_FILES)
479	crack_method->load_file (argv[optind]);
480	else if (verbosity)
481	printf ("%d file maximum reached, ignoring '%s'\n", MAX_FILES, argv[optind]);
482
483	if (file_count == 0)
484	{
485	fprintf (stderr, "no usable files found\n");
486	exit (1);
487	}
488
489	crack_method->init_crack_pw ();
490
491	switch (mode)
492	{
493	case m_brute_force:
494	parse_charset (charset);
495
496	if (!pw[0])
497	{
498	if (min_length < 0)
499	{
500	fprintf (stderr, "you have to specify either --init-password or --length with --brute-force\n");
501	exit (1);
502	}
503	else
504	{
505	u8 *p = pw;
506	while (p < pw + min_length)
507	*p++ = bf_next[255];
508
509	*p++ = 0;
510	}
511	}
512
513	if (residuent)
514	{
515	int xmodul = modul;
516	modul = residuent;
517	pw_end = pw + strlen (pw);
518	brute_force_gen ();
519	printf ("%s\n", pw);
520	modul = xmodul;
521	printf ("WARNING: residuent mode NOT supported YET!\n");
522	}
523
524	crack_method->crack_pw (brute_force_gen, print_callback);
525	break;
526
527	case m_dictionary:
528	if (!pw[0])
529	{
530	fprintf (stderr, "you have to specify a file to read passwords from using the -p switch\n");
531	exit (1);
532	}
533
534	if (!(dict_file = fopen (pw, "r")))
535	{
536	perror (pw);
537	exit (1);
538	}
539	else
540	{
541	*(pw_end = pw) = 0;
542	dictionary_gen (); /* fetch first password */
543	crack_method->crack_pw (dictionary_gen, print_callback);
544
545	fclose (dict_file);
546	}
547
548	break;
549
550	default:
551	fprintf (stderr, "specified mode not supported in this version\n");
552	exit (1);
553	}
554
555	return 0;
556	}