maxpath.c

   1 /*
   2  * maxpath.c - Find the longest trust path in the key database.
   3  *
   4  * Jonathan McDowell <noodles@earth.li>
   5  *
   6  * Copyright 2001-2002 Project Purple.
   7  *
   8  * $Id: maxpath.c,v 1.10 2003/10/15 21:15:21 noodles Exp $
   9  */
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14
  15 #include "stats.h"
  16 #include "hash.h"
  17 #include "keydb.h"
  18 #include "ll.h"
  19 #include "onak-conf.h"
  20 #include "stats.h"
  21
  22 void findmaxpath(unsigned long max)
  23 {
  24         struct stats_key *from, *to, *tmp;
  25         struct ll *curkey;
  26         unsigned long distance, loop;
  27
  28         distance = 0;
  29         from = to = tmp = NULL;
  30
  31         /*
  32          * My (noodles@earth.li, DSA) key is in the strongly connected set of
  33          * keys, so we use it as a suitable starting seed.
  34          */
  35         cached_getkeysigs(0xF1BD4BE45B430367);
  36
  37         /*
  38          * Loop through the hash examining each key present and finding the
  39          * furthest key from it. If it's further than our current max then
  40          * store it as our new max and print out the fact we've found a new
  41          * max.
  42          */
  43         for (loop = 0; (loop < HASHSIZE) && (distance < max); loop++) {
  44                 curkey = gethashtableentry(loop);
  45                 while (curkey != NULL && distance < max) {
  46                         cached_getkeysigs(((struct stats_key *)
  47                                         curkey->object)->keyid);
  48                         initcolour(false);
  49                         tmp = furthestkey((struct stats_key *)
  50                                                 curkey->object);
  51                         if (tmp->colour > distance) {
  52                                 from = (struct stats_key *)curkey->object;
  53                                 to = tmp;
  54                                 distance = to->colour;
  55                                 printf("Current max path (#%ld) is from %llX"
  56                                                 " to %llX (%ld steps)\n",
  57                                                 loop,
  58                                                 from->keyid,
  59                                                 to->keyid,
  60                                                 distance);
  61                         }
  62                         curkey=curkey->next;
  63                 }
  64         }
  65         printf("Max path is from %llX to %llX (%ld steps)\n",
  66                         from->keyid,
  67                         to->keyid,
  68                         distance);
  69         dofindpath(to->keyid, from->keyid, false, 1);
  70 }
  71
  72 int main(int argc, char *argv[])
  73 {
  74         readconfig(NULL);
  75         initdb();
  76         inithash();
  77         findmaxpath(30);
  78         printf("--------\n");
  79         findmaxpath(30);
  80         destroyhash();
  81         cleanupdb();
  82         cleanupconfig();
  83
  84         return EXIT_SUCCESS;
  85 }