zylom trivial pursuit genus edition questions.dat.! (de)cryptor

zylom.c

#include <stdio.h>

static const unsigned char D[256] =
    "\x3E\x29\xEB\x7F\x9E\xB9\x60\xC7\x8B\x18\x77\xA0\xD3\x35\xB5\x5F"
    "\x44\x49\x1B\x74\xA3\x6A\xF5\xCD\x28\x88\x0C\x53\x01\xA4\xB6\x47"
    "\x2E\x65\x9B\xC5\x83\x66\x10\x22\xDF\xFD\xD1\x70\x0A\xB1\x8A\xA9"
    "\xF3\x21\x6B\x30\xF4\x27\xBC\x11\x15\xDD\xF7\xED\x48\xE1\x17\x9A"
    "\x46\xC4\xB7\x6C\xD0\x91\xAA\x8E\xCC\xC6\x1F\x2C\x73\xDB\x5D\x71"
    "\x1E\x6F\xFC\x33\xCA\x25\xF2\x4D\x0B\x1C\xF6\x06\xB8\x26\xC9\x36"
    "\xB3\xE0\xBE\xD2\xDE\x67\xE6\x4F\x81\x3F\xF0\xD7\xC3\x00\x75\x6E"
    "\x0E\x2B\x9D\xC1\x72\x8F\x86\x7E\x19\xBF\xB2\xC0\xCE\x8C\x3D\x80"
    "\x32\xA8\xE3\xD8\x96\x62\x79\x4A\xA1\x34\xFB\xC8\xE2\x90\xB0\xD9"
    "\xA2\x9C\x31\x04\xBB\x2D\xA7\xD4\x69\x03\x84\xE5\x1A\x85\x41\x3B"
    "\x5C\x54\x98\xB4\x61\x93\x9F\xF9\x87\x7A\x42\x5B\x59\x43\xCB\x16"
    "\xE8\xE7\x05\xEE\x6D\x68\x94\xC2\x14\xA5\x3C\x56\x09\x2A\x1D\x39"
    "\xF8\x95\x57\x23\x45\xBA\x92\x3A\x0F\xE4\xAC\x97\xEC\x2F\x89\x5E"
    "\x99\xFA\x58\x64\x0D\xEF\x08\x4E\xBD\x82\x63\x5A\xF1\x13\x50\x55"
    "\x37\x51\x02\x38\xAB\x40\xAF\xA6\xAE\xFF\x8D\xE9\x07\x4C\x4B\xCF"
    "\xEA\x78\xDC\xFE\xD5\x7D\xDA\x12\x76\xD6\xAD\x52\x7B\x20\x7C\x24"
;

int main(int argc, char *argv[]) {
    int i, c;
    fprintf(stderr, "zylom trivial pursuit questions.dat (de)cryptor ... ");
    fflush(stderr);
    for (i = 0; (c = fgetc(stdin)) != EOF; i++) {
        fputc(c ^ (D[i & 0xFF] & 0x7F), stdout);
    }
    fprintf(stderr, "done\n");
    return 0;
}

/* Usage:
% gcc zylom.c -o zylom
% ./zylom <questions.dat.\! >decrypted
zylom trivial pursuit questions.dat (de)cryptor ... done
% head -n4 decrypted
tri_brown_1 Who said, after the launch of her former friend's autobiography: I was the buffet and he just couldn't resist the dessert?
tri_brown_1_1 Monica Lewinsky
tri_brown_1_2 Edwina Currie
tri_brown_1_3 Princess Diana
% ./zylom <decrypted >encrypted
zylom trivial pursuit questions.dat (de)cryptor ... done
% sha1sum encrypted questions.dat.\!
3af631bb15e7daf1ea22bbcc92b859ab5cbd5631  encrypted
3af631bb15e7daf1ea22bbcc92b859ab5cbd5631  questions.dat.!
*/