source/libs/zziplib/zziplib-0.13.62/bins/zzxordir.c

   1 /*
   2  *      Copyright (c) 2000,2001,2002 Guido Draheim <guidod@gmx.de>
   3  *      Use freely under the restrictions of the ZLIB license.
   4  *
   5  *      show zip-reading with xor-obfuscation.
   6  *      Note that the difference to the standard zzdir.c is quite small.
   7  */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <ctype.h>
  13
  14 #include <zzip/zzip.h>
  15 #include <zzip/plugin.h>
  16
  17 #if defined ZZIP_HAVE_UNISTD_H
  18 #include <unistd.h>
  19 #elif defined ZZIP_HAVE_IO_H
  20 #include <io.h>
  21 #else
  22 #error need posix io for this example
  23 #endif
  24
  25 #ifndef O_BINARY
  26 #define O_BINARY 0
  27 #endif
  28
  29 static const char usage[] =
  30 {
  31     "zzdir <dir>.. \n"
  32     "  - prints a content table to stdout, but the dir can also be a zip-arch."
  33     "\n"
  34     " the file is part of an inflated zip-archive obfuscated with xor value,\n"
  35     " given by the numeric option (default is 0x55). \n"
  36     "\n"
  37     " To show the contents of a zip-archive named 'test.zip', you may write \n"
  38     "     zzdir test \n"
  39 };
  40
  41 static int xor_value;
  42
  43 static zzip_ssize_t xor_read (int f, void* p, zzip_size_t l)
  44 {
  45     zzip_ssize_t r = read(f, p, l);
  46     zzip_ssize_t x; char* q; for (x=0, q=p; x < r; x++) q[x] ^= xor_value;
  47     return r;
  48 }
  49
  50 static zzip_plugin_io_handlers xor_handlers = { };
  51 static zzip_strings_t xor_fileext[] = { ".dat", "", 0 };
  52
  53 int
  54 main (int argc, char ** argv)
  55 {
  56     int argn;
  57     int exitcode = 0;
  58     xor_value = 0x55;
  59
  60     if (argc <= 1 || ! strcmp (argv[1], "--help"))
  61     {
  62         printf (usage);
  63         return 0;
  64     }
  65     if (! strcmp (argv[1], "--version"))
  66     {
  67         printf (__FILE__" version "ZZIP_PACKAGE" "ZZIP_VERSION"\n");
  68         return 0;
  69     }
  70
  71     zzip_init_io (&xor_handlers, 0); xor_handlers.fd.read = &xor_read;
  72
  73     for (argn=1; argn < argc; argn++)
  74     {
  75         ZZIP_DIR * dir;
  76         ZZIP_DIRENT * d;
  77
  78         if (argv[argn][0] == '-')
  79         {
  80             if (isdigit(argv[argn][1])) xor_value = atoi (argv[argn]+1);
  81             continue;
  82         }
  83
  84         dir = zzip_opendir_ext_io(argv[argn],
  85                                   ZZIP_ONLYZIP, xor_fileext, &xor_handlers);
  86         if (! dir)
  87         {
  88             fprintf (stderr, "did not open %s: ", argv[argn]);
  89             perror(argv[argn]);
  90             exitcode++;
  91             continue;
  92         }
  93
  94         if (argc > 2) printf ("%s: \n", argv[argn]);
  95
  96         /* read each dir entry and show one line of info per file */
  97         while ((d = zzip_readdir (dir)))
  98         {
  99             /* orignalsize / compression-type / compression-ratio / filename */
 100             if (d->st_size > 999999)
 101             {
 102                 printf ("%5dK %-9s %2d%% %s \n",
 103                         d->st_size>>10,
 104                         zzip_compr_str(d->d_compr),
 105                         100 - (d->d_csize|1)/((d->st_size/100)|1),
 106                         d->d_name);
 107             }else{
 108                 printf ("%6d %-9s %2d%% %s \n",
 109                         d->st_size,
 110                         zzip_compr_str(d->d_compr),
 111                         100 - (d->d_csize|1)*100/(d->st_size|1),
 112                         d->d_name);
 113             }
 114         }
 115
 116         zzip_closedir(dir);
 117     }
 118
 119     return exitcode;
 120 }
 121
 122 /*
 123  * Local variables:
 124  * c-file-style: "stroustrup"
 125  * End:
 126  */