/* Withdraw the array type of object from the file buffer */
fbuf_uint32_t fbuf_withdraw( void *dest,
const fbuf_uint32_t elem_sz,
const fbuf_uint32_t Nelem,
filebuf_t *fbuf )
{
#if ! defined( WORDS_BIGENDIAN )
void *buf;
#endif
fbuf_uint32_t total_bytesize;
fbuf_uint32_t total_fbufunit;
total_bytesize = elem_sz * Nelem;
total_fbufunit = byte2fbufunit( total_bytesize );
if ( fbuf->ptr + total_fbufunit <= fbuf->end ) {
#if ! defined( WORDS_BIGENDIAN )
# if ! defined( HAVE_ALLOCA )
buf = ( char * ) malloc( total_bytesize );
# else
buf = ( char * ) alloca( total_bytesize );
# endif
if ( buf == NULL ) return (fbuf_uint32_t) 0;
memcpy( buf, fbuf->ptr, byte2char( total_bytesize ) );
byteswap( Nelem, elem_sz, buf );
memcpy( dest, buf, byte2char( total_bytesize ) );
# if ! defined( HAVE_ALLOCA )
free( buf );
# endif
#else
memcpy( dest, fbuf->ptr, byte2char( total_bytesize ) );
#endif
fbuf->ptr += total_fbufunit;
return Nelem;
}
else
return (fbuf_uint32_t) 0;
}
int main(int argc, char **argv)
{
int i, rc;
char *result;
print_header();
rc = parse_argv(argc, argv);
if (rc) {
fprintf(stderr, "\n");
print_help(argv[0]);
return rc;
}
fprintf(stderr, "[i] %s\n", enable_feedback ?
"Feedback mode enabled" : "Default ciphering mode");
// Decode ciphertext
decode(&data, enable_feedback);
fprintf(stderr, "[i] Using the following gamma sequence: ");
for (i = 0; i < data.plain_len; i++) {
if (i > 20) {
fprintf(stderr, "...");
break;
}
fprintf(stderr, "%02X", data.gamma[i]);
}
fprintf(stderr, "\n\n");
// Print result
byte2char(data.plaintext, &result, data.plain_len);
printf("%s\n", result);
// Free the memory
free_crypto_data(&data);
return 0;
}
