gpgwww.c

   1 /*
   2  * gpgwww.c - www interface to path finder.
   3  *
   4  * Jonathan McDowell <noodles@earth.li>
   5  *
   6  * Copyright 2001-2002 Project Purple.
   7  */
   8
   9 #include <inttypes.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13
  14 #include "armor.h"
  15 #include "charfuncs.h"
  16 #include "getcgi.h"
  17 #include "hash.h"
  18 #include "keydb.h"
  19 #include "log.h"
  20 #include "mem.h"
  21 #include "onak-conf.h"
  22 #include "parsekey.h"
  23 #include "stats.h"
  24
  25 #define OP_UNKNOWN 0
  26 #define OP_GET     1
  27
  28 int parsecgistuff(char **cgiparams, uint64_t *from, uint64_t *to)
  29 {
  30         int i = 0;
  31         int op = OP_UNKNOWN;
  32
  33         if (cgiparams != NULL) {
  34                 i = 0;
  35                 while (cgiparams[i] != NULL) {
  36                         if (!strcmp(cgiparams[i], "to")) {
  37                                 *to = strtoul(cgiparams[i+1], NULL, 16);
  38                         } else if (!strcmp(cgiparams[i], "from")) {
  39                                 *from = strtoul(cgiparams[i+1], NULL, 16);
  40                         } else if (!strcmp(cgiparams[i], "op")) {
  41                                 if (!strcmp(cgiparams[i+1], "get")) {
  42                                         op = OP_GET;
  43                                 }
  44                         }
  45                         i += 2;
  46                 }
  47         }
  48
  49         return op;
  50 }
  51
  52 int getkeyspath(uint64_t have, uint64_t want, int count)
  53 {
  54         struct openpgp_publickey *publickey = NULL;
  55         struct openpgp_packet_list *packets = NULL;
  56         struct openpgp_packet_list *list_end = NULL;
  57         struct stats_key *keyinfoa, *keyinfob, *curkey;
  58         uint64_t fullhave, fullwant;
  59         int rec;
  60         int pathlen = 0;
  61
  62         fullhave = getfullkeyid(have);
  63         fullwant = getfullkeyid(want);
  64
  65         /*
  66          * Make sure the keys we have and want are in the cache.
  67          */
  68         cached_getkeysigs(fullhave);
  69         cached_getkeysigs(fullwant);
  70
  71         if ((keyinfoa = findinhash(fullhave)) == NULL) {
  72                 return 1;
  73         }
  74         if ((keyinfob = findinhash(fullwant)) == NULL) {
  75                 return 1;
  76         }
  77
  78         while (pathlen < count) {
  79                 /*
  80                  * Fill the tree info up.
  81                  */
  82                 initcolour(true);
  83                 rec = findpath(keyinfoa, keyinfob);
  84                 keyinfob->parent = 0;
  85                 if (keyinfoa->colour == 0) {
  86                         pathlen = count;
  87                 } else {
  88                         /*
  89                          * Skip the first key, as the remote user will already
  90                          * have it
  91                          */
  92                         curkey = findinhash(keyinfoa->parent);
  93                         while (curkey != NULL && curkey->keyid != 0) {
  94                                 if (curkey->keyid != fullwant && fetch_key(
  95                                                 curkey->keyid,
  96                                                         &publickey, false)) {
  97                                         flatten_publickey(publickey,
  98                                                         &packets,
  99                                                         &list_end);
 100                                         free_publickey(publickey);
 101                                         publickey = NULL;
 102                                 }
 103                                 if (curkey != keyinfoa && curkey != keyinfob) {
 104                                         curkey->disabled = true;
 105                                 }
 106                                 curkey = findinhash(curkey->parent);
 107                         }
 108                 }
 109                 pathlen++;
 110         }
 111
 112         /*
 113          * Add the destination key to the list of returned keys.
 114          */
 115         if (fetch_key(fullwant, &publickey, false)) {
 116                 flatten_publickey(publickey,
 117                                 &packets,
 118                                 &list_end);
 119                 free_publickey(publickey);
 120                 publickey = NULL;
 121         }
 122
 123         armor_openpgp_stream(stdout_putchar, NULL, packets);
 124         free_packet_list(packets);
 125         packets = list_end = NULL;
 126
 127         return 0;
 128 }
 129
 130 int main(int argc, char *argv[])
 131 {
 132         char     **cgiparams = NULL;    /* Our CGI parameter block */
 133         uint64_t   from = 0, to = 0;
 134         int        op = OP_UNKNOWN;
 135
 136         cgiparams = getcgivars(argc, argv);
 137
 138
 139         op = parsecgistuff(cgiparams, &from, &to);
 140
 141         if (op != OP_GET) {
 142                 start_html("Experimental PGP key path finder results");
 143         } else {
 144                 puts("Content-Type: text/plain\n");
 145         }
 146
 147         if (from == 0 || to == 0) {
 148                 printf("Must pass from & to\n");
 149                 puts("</HTML>");
 150                 exit(1);
 151         }
 152
 153         if (op != OP_GET) {
 154                 printf("<P>Looking for path from 0x%llX to 0x%llX.\n",
 155                                 from, to);
 156                 printf("<A HREF=\"gpgwww?from=0x%08llX&to=0x%08llX\">"
 157                                 "Find reverse path</A>\n",
 158                                 to,
 159                                 from);
 160                 printf("<A HREF=\"gpgwww?from=0x%08llX&to=0x%08llX&op=get\">"
 161                                 "Get all keys listed</A></P>\n",
 162                                 from,
 163                                 to);
 164         }
 165
 166         readconfig(NULL);
 167         initlogthing("gpgwww", config.logfile);
 168         initdb(true);
 169         inithash();
 170         logthing(LOGTHING_NOTICE, "Looking for path from 0x%llX to 0x%llX.",
 171                         from,
 172                         to);
 173         if (op == OP_GET) {
 174                 getkeyspath(from, to, 3);
 175         } else {
 176                 dofindpath(from, to, true, 3);
 177         }
 178         destroyhash();
 179         cleanupdb();
 180         cleanuplogthing();
 181         cleanupconfig();
 182
 183         if (op != OP_GET) {
 184                 puts("<HR>");
 185                 puts("Produced by gpgwww " VERSION ", part of onak. "
 186                         "<A HREF=\"mailto:noodles-onak@earth.li\">"
 187                         "Jonathan McDowell</A>");
 188                 end_html();
 189         }
 190
 191         cleanupcgi(cgiparams);
 192         cgiparams = NULL;
 193
 194         return EXIT_SUCCESS;
 195 }