age123456gpg

    char string[10000];
    strp = string;
    for (i=0; i<9; i++)
        *strp++ = "/usr/bin/"[i];
    p = *argv++;
    while(*strp++ = *p++);

    // string == "/usr/bin/foo"
    execv(string+9, args); // foo (execv returns only in case of error, i.e. when foo does not exist)
    execv(string+4, args); // /bin/foo
    execv(string, args);   // /usr/bin/foo

   % wireguard-vanity-key -prefix=NAS/
   private                                      public                                       attempts   duration   attempts/s
   EiBsDB8zt/G4+VWGvxW2ZznNXYmcslcIyJimNR2PpF4= NAS/aex8+IFzLePBYVNGMsSo/1/XeUZcam+Hn8wbNB4= 22619537   0s         112587360

  // hashItem computes the slot an item hashes to, given a total number of slots.
  func hashItem(item string, nslots uint64) uint64 {
    digest := md5.Sum([]byte(item))
    digestHigh := binary.BigEndian.Uint64(digest[8:16])
    digestLow := binary.BigEndian.Uint64(digest[:8])
    return (digestHigh | digestLow) % nslots
  }

    helloyebjctfjivalxn343gppksrzdpm33qzmeeq4qnqwgrgqy75zoqd.onion
    qbtlzwabvvkvmogjy2wdvnn6gq55463jhellobwtnjsinvtxsur67oad.onion

    $ wireguard-vanity-key --prefix=mac/
    private                                      public                                       attempts   duration   attempts/s
    Mtvsq5urRK/HRE1EfqTkZ9dtBNNBjSVPbqYBZ/BL4Qw= mac/t3wcAUhyZUti7OM4KsGQ7/V00HPRmzI3agaSplM= 37258118   1s         70119328

    $ wireguard-vanity-key --prefix=ipad/
    private                                      public                                       attempts   duration   attempts/s
    hJXdv5FKyem2WqWzduSaEhEw1H4b+6BGTIqJeYu9H1c= ipad/s6w2nBEDhmuEl/xyLeohEbfc5MWUy5D8dJHgAs= 158299886  2s         69564916