void LPP_PsarDecoder_Init(void)
{
if(initialized)
{
return;
}
zzip_init_io(&psar_handlers, 0);
psar_handlers.fd.open = &psar_open;
psar_handlers.fd.close = &psar_close;
psar_handlers.fd.read = &psar_read;
psar_handlers.fd.seeks = &psar_seek;
psar_handlers.fd.filesize = &psar_fsize;
initialized = 1;
}
int
main (int argc, char* argv[])
{
if (argc <= 1 || argc > 3)
{
printf (usage);
exit (0);
}
if (strlen(argv[1]) > 128) {
fprintf(stderr, "Please provide a filename shorter than 128 chars.\n");
exit(1);
}
/* obfuscate the file */
{
int ch;
FILE* fin;
FILE* fout;
fin = fopen(argv[1], "rb");
if (!fin) {
fprintf(stderr, "Can't open input file \"%s\"\n", argv[1]);
exit(1);
}
fout = fopen((argc == 2) ? "obfuscated" : "obfuscated.dat", "wb");
if (!fout) {
fprintf(stderr, "Can't open output file \"obfuscated\"\n");
exit(1);
}
while ((ch = fgetc(fin)) != EOF) {
ch ^= 0x55;
fputc(ch, fout);
}
fclose(fout);
fclose(fin);
}
/* install our I/O hander */
zzip_init_io(&our_handlers, 0);
our_handlers.read = &our_read;
{
# define argn 2
ZZIP_FILE* fp;
char name[256];
if (argc == 3) {
sprintf(name, "obfuscated/%s", argv[argn]);
} else {
sprintf(name, "obfuscated");
}
fp = zzip_open_ext_io (name, O_RDONLY|O_BINARY, ZZIP_PREFERZIP,
our_fileext, &our_handlers);
if (! fp)
{
perror (name);
exit(1);
}else{
char buf[17];
int n;
/* read chunks of 16 bytes into buf and print them to stdout */
while (0 < (n = zzip_read(fp, buf, 16)))
{
buf[n] = '\0';
# ifdef STDOUT_FILENO
write (STDOUT_FILENO, buf, n);
# else
fwrite (buf, 1, n, stdout);
# endif
}
if (n == -1)
perror (argv[argn]);
}
}
return 0;
}