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/*
* Copyright (c) 2000,2001,2002 Guido Draheim <guidod@gmx.de>
* Use freely under the restrictions of the ZLIB license.
*
* show zip-reading with xor-obfuscation.
* Note that the difference to the standard zzdir.c is quite small.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <zzip/zzip.h>
#include <zzip/plugin.h>
#if defined ZZIP_HAVE_UNISTD_H
#include <unistd.h>
#elif defined ZZIP_HAVE_IO_H
#include <io.h>
#else
#error need posix io for this example
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
static const char usage[] =
{
"zzdir <dir>.. \n"
" - prints a content table to stdout, but the dir can also be a zip-arch."
"\n"
" the file is part of an inflated zip-archive obfuscated with xor value,\n"
" given by the numeric option (default is 0x55). \n"
"\n"
" To show the contents of a zip-archive named 'test.zip', you may write \n"
" zzdir test \n"
};
static int xor_value;
static zzip_ssize_t xor_read (int f, void* p, zzip_size_t l)
{
zzip_ssize_t r = read(f, p, l);
zzip_ssize_t x; char* q; for (x=0, q=p; x < r; x++) q[x] ^= xor_value;
return r;
}
static zzip_plugin_io_handlers xor_handlers = { };
static zzip_strings_t xor_fileext[] = { ".dat", "", 0 };
int
main (int argc, char ** argv)
{
int argn;
int exitcode = 0;
xor_value = 0x55;
if (argc <= 1 || ! strcmp (argv[1], "--help"))
{
printf (usage);
return 0;
}
if (! strcmp (argv[1], "--version"))
{
printf (__FILE__" version "ZZIP_PACKAGE" "ZZIP_VERSION"\n");
return 0;
}
zzip_init_io (&xor_handlers, 0); xor_handlers.fd.read = &xor_read;
for (argn=1; argn < argc; argn++)
{
ZZIP_DIR * dir;
ZZIP_DIRENT * d;
if (argv[argn][0] == '-')
{
if (isdigit(argv[argn][1])) xor_value = atoi (argv[argn]+1);
continue;
}
dir = zzip_opendir_ext_io(argv[argn],
ZZIP_ONLYZIP, xor_fileext, &xor_handlers);
if (! dir)
{
fprintf (stderr, "did not open %s: ", argv[argn]);
perror(argv[argn]);
exitcode++;
continue;
}
if (argc > 2) printf ("%s: \n", argv[argn]);
/* read each dir entry and show one line of info per file */
while ((d = zzip_readdir (dir)))
{
/* orignalsize / compression-type / compression-ratio / filename */
if (d->st_size > 999999)
{
printf ("%5dK %-9s %2d%% %s \n",
d->st_size>>10,
zzip_compr_str(d->d_compr),
100 - (d->d_csize|1)/((d->st_size/100)|1),
d->d_name);
}else{
printf ("%6d %-9s %2d%% %s \n",
d->st_size,
zzip_compr_str(d->d_compr),
100 - (d->d_csize|1)*100/(d->st_size|1),
d->d_name);
}
}
zzip_closedir(dir);
}
return exitcode;
}
/*
* Local variables:
* c-file-style: "stroustrup"
* End:
*/
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