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