gpgwww.c

   1 /*
   2  * gpgwww.c - www interface to path finder.
   3  *
   4  * Copyright 2001-2004 Jonathan McDowell <noodles@earth.li>
   5  *
   6  * This program is free software: you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 51
  17  * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include <inttypes.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "armor.h"
  26 #include "charfuncs.h"
  27 #include "cleanup.h"
  28 #include "getcgi.h"
  29 #include "hash.h"
  30 #include "keydb.h"
  31 #include "log.h"
  32 #include "mem.h"
  33 #include "onak-conf.h"
  34 #include "parsekey.h"
  35 #include "stats.h"
  36 #include "version.h"
  37
  38 #define OP_UNKNOWN 0
  39 #define OP_GET     1
  40
  41 int parsecgistuff(char **cgiparams, uint64_t *from, uint64_t *to)
  42 {
  43         int i = 0;
  44         int op = OP_UNKNOWN;
  45
  46         if (cgiparams != NULL) {
  47                 i = 0;
  48                 while (cgiparams[i] != NULL) {
  49                         if (!strcmp(cgiparams[i], "to")) {
  50                                 *to = strtoul(cgiparams[i+1], NULL, 16);
  51                         } else if (!strcmp(cgiparams[i], "from")) {
  52                                 *from = strtoul(cgiparams[i+1], NULL, 16);
  53                         } else if (!strcmp(cgiparams[i], "op")) {
  54                                 if (!strcmp(cgiparams[i+1], "get")) {
  55                                         op = OP_GET;
  56                                 }
  57                         }
  58                         i += 2;
  59                 }
  60         }
  61
  62         return op;
  63 }
  64
  65 int getkeyspath(uint64_t have, uint64_t want, int count)
  66 {
  67         struct openpgp_publickey *publickey = NULL;
  68         struct openpgp_packet_list *packets = NULL;
  69         struct openpgp_packet_list *list_end = NULL;
  70         struct stats_key *keyinfoa, *keyinfob, *curkey;
  71         uint64_t fullhave, fullwant;
  72         int pathlen = 0;
  73
  74         fullhave = config.dbbackend->getfullkeyid(have);
  75         fullwant = config.dbbackend->getfullkeyid(want);
  76
  77         /*
  78          * Make sure the keys we have and want are in the cache.
  79          */
  80         config.dbbackend->cached_getkeysigs(fullhave);
  81         config.dbbackend->cached_getkeysigs(fullwant);
  82
  83         if ((keyinfoa = findinhash(fullhave)) == NULL) {
  84                 return 1;
  85         }
  86         if ((keyinfob = findinhash(fullwant)) == NULL) {
  87                 return 1;
  88         }
  89
  90         while ((!cleanup()) && (pathlen < count)) {
  91                 /*
  92                  * Fill the tree info up.
  93                  */
  94                 initcolour(true);
  95                 findpath(keyinfoa, keyinfob);
  96                 keyinfob->parent = 0;
  97                 if (keyinfoa->colour == 0) {
  98                         pathlen = count;
  99                 } else {
 100                         /*
 101                          * Skip the first key, as the remote user will already
 102                          * have it
 103                          */
 104                         curkey = findinhash(keyinfoa->parent);
 105                         while (curkey != NULL && curkey->keyid != 0) {
 106                                 if (curkey->keyid != fullwant &&
 107                                                 config.dbbackend->fetch_key(
 108                                                 curkey->keyid,
 109                                                 &publickey, false)) {
 110                                         flatten_publickey(publickey,
 111                                                         &packets,
 112                                                         &list_end);
 113                                         free_publickey(publickey);
 114                                         publickey = NULL;
 115                                 }
 116                                 if (curkey != keyinfoa && curkey != keyinfob) {
 117                                         curkey->disabled = true;
 118                                 }
 119                                 curkey = findinhash(curkey->parent);
 120                         }
 121                 }
 122                 pathlen++;
 123         }
 124
 125         /*
 126          * Add the destination key to the list of returned keys.
 127          */
 128         if (config.dbbackend->fetch_key(fullwant, &publickey, false)) {
 129                 flatten_publickey(publickey,
 130                                 &packets,
 131                                 &list_end);
 132                 free_publickey(publickey);
 133                 publickey = NULL;
 134         }
 135
 136         armor_openpgp_stream(stdout_putchar, NULL, packets);
 137         free_packet_list(packets);
 138         packets = list_end = NULL;
 139
 140         return 0;
 141 }
 142
 143 int main(int argc, char *argv[])
 144 {
 145         char     **cgiparams = NULL;    /* Our CGI parameter block */
 146         uint64_t   from = 0, to = 0;
 147         int        op = OP_UNKNOWN;
 148
 149         cgiparams = getcgivars(argc, argv);
 150
 151
 152         op = parsecgistuff(cgiparams, &from, &to);
 153
 154         if (op != OP_GET) {
 155                 start_html("Experimental PGP key path finder results");
 156         } else {
 157                 puts("Content-Type: text/plain\n");
 158         }
 159
 160         if (from == 0 || to == 0) {
 161                 printf("Must pass from & to\n");
 162                 puts("</HTML>");
 163                 exit(1);
 164         }
 165
 166         if (op != OP_GET) {
 167                 printf("<P>Looking for path from 0x%016" PRIX64" to 0x%016"
 168                                 PRIX64 ".\n",
 169                                 from, to);
 170                 printf("<A HREF=\"gpgwww?from=0x%016" PRIX64 "&to=0x%016" PRIX64
 171                                 "\">Find reverse path</A>\n",
 172                                 to,
 173                                 from);
 174                 printf("<A HREF=\"gpgwww?from=0x%08" PRIX64 "&to=0x%08" PRIX64
 175                                 "&op=get\">"
 176                                 "Get all keys listed</A></P>\n",
 177                                 from,
 178                                 to);
 179         }
 180
 181         readconfig(NULL);
 182         initlogthing("gpgwww", config.logfile);
 183         catchsignals();
 184         config.dbbackend->initdb(true);
 185         inithash();
 186         logthing(LOGTHING_NOTICE, "Looking for path from 0x%016" PRIX64
 187                         " to 0x%016"
 188                         PRIX64,
 189                         from,
 190                         to);
 191         if (op == OP_GET) {
 192                 getkeyspath(from, to, 3);
 193         } else {
 194                 dofindpath(from, to, true, 3);
 195         }
 196         destroyhash();
 197         config.dbbackend->cleanupdb();
 198         cleanuplogthing();
 199         cleanupconfig();
 200
 201         if (op != OP_GET) {
 202                 puts("<HR>");
 203                 puts("Produced by gpgwww " ONAK_VERSION ", part of onak. ");
 204                 end_html();
 205         }
 206
 207         cleanupcgi(cgiparams);
 208         cgiparams = NULL;
 209
 210         return EXIT_SUCCESS;
 211 }