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, see <https://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <inttypes.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include "build-config.h"
  25
  26 #include "armor.h"
  27 #include "charfuncs.h"
  28 #include "cleanup.h"
  29 #include "getcgi.h"
  30 #include "hash.h"
  31 #include "keydb.h"
  32 #include "log.h"
  33 #include "mem.h"
  34 #include "onak-conf.h"
  35 #include "parsekey.h"
  36 #include "stats.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(struct onak_dbctx *dbctx,
  66                 uint64_t have, uint64_t want, int count)
  67 {
  68         struct openpgp_publickey *publickey = NULL;
  69         struct openpgp_packet_list *packets = NULL;
  70         struct openpgp_packet_list *list_end = NULL;
  71         struct stats_key *keyinfoa, *keyinfob, *curkey;
  72         int pathlen = 0;
  73
  74         /*
  75          * Make sure the keys we have and want are in the cache.
  76          */
  77         dbctx->cached_getkeysigs(dbctx, have);
  78         dbctx->cached_getkeysigs(dbctx, want);
  79
  80         if ((keyinfoa = findinhash(have)) == NULL) {
  81                 return 1;
  82         }
  83         if ((keyinfob = findinhash(want)) == NULL) {
  84                 return 1;
  85         }
  86
  87         while ((!cleanup()) && (pathlen < count)) {
  88                 /*
  89                  * Fill the tree info up.
  90                  */
  91                 initcolour(true);
  92                 findpath(dbctx, keyinfoa, keyinfob);
  93                 keyinfob->parent = 0;
  94                 if (keyinfoa->colour == 0) {
  95                         pathlen = count;
  96                 } else {
  97                         /*
  98                          * Skip the first key, as the remote user will already
  99                          * have it
 100                          */
 101                         curkey = findinhash(keyinfoa->parent);
 102                         while (curkey != NULL && curkey->keyid != 0) {
 103                                 if (curkey->keyid != want &&
 104                                                 dbctx->fetch_key_id(dbctx,
 105                                                 curkey->keyid,
 106                                                 &publickey, false)) {
 107                                         flatten_publickey(publickey,
 108                                                         &packets,
 109                                                         &list_end);
 110                                         free_publickey(publickey);
 111                                         publickey = NULL;
 112                                 }
 113                                 if (curkey != keyinfoa && curkey != keyinfob) {
 114                                         curkey->disabled = true;
 115                                 }
 116                                 curkey = findinhash(curkey->parent);
 117                         }
 118                 }
 119                 pathlen++;
 120         }
 121
 122         /*
 123          * Add the destination key to the list of returned keys.
 124          */
 125         if (dbctx->fetch_key_id(dbctx, want, &publickey, false)) {
 126                 flatten_publickey(publickey,
 127                                 &packets,
 128                                 &list_end);
 129                 free_publickey(publickey);
 130                 publickey = NULL;
 131         }
 132
 133         armor_openpgp_stream(stdout_putchar, NULL, packets);
 134         free_packet_list(packets);
 135         packets = list_end = NULL;
 136
 137         return 0;
 138 }
 139
 140 int main(int argc, char *argv[])
 141 {
 142         char     **cgiparams = NULL;    /* Our CGI parameter block */
 143         uint64_t   from = 0, to = 0;
 144         int        op = OP_UNKNOWN;
 145         struct onak_dbctx *dbctx;
 146
 147         cgiparams = getcgivars(argc, argv);
 148
 149
 150         op = parsecgistuff(cgiparams, &from, &to);
 151
 152         if (op != OP_GET) {
 153                 start_html("Experimental PGP key path finder results");
 154         } else {
 155                 puts("Content-Type: text/plain\n");
 156         }
 157
 158         if (from == 0 || to == 0) {
 159                 printf("Must pass from & to\n");
 160                 puts("</HTML>");
 161                 exit(1);
 162         }
 163
 164         if (op != OP_GET) {
 165                 printf("<P>Looking for path from 0x%016" PRIX64" to 0x%016"
 166                                 PRIX64 ".\n",
 167                                 from, to);
 168                 printf("<A HREF=\"gpgwww?from=0x%016" PRIX64 "&to=0x%016" PRIX64
 169                                 "\">Find reverse path</A>\n",
 170                                 to,
 171                                 from);
 172                 printf("<A HREF=\"gpgwww?from=0x%016" PRIX64 "&to=0x%016" PRIX64
 173                                 "&op=get\">"
 174                                 "Get all keys listed</A></P>\n",
 175                                 from,
 176                                 to);
 177         }
 178
 179         readconfig(NULL);
 180         initlogthing("gpgwww", config.logfile);
 181         catchsignals();
 182         dbctx = config.dbinit(config.backend, true);
 183         inithash();
 184         logthing(LOGTHING_NOTICE, "Looking for path from 0x%016" PRIX64
 185                         " to 0x%016"
 186                         PRIX64,
 187                         from,
 188                         to);
 189         if (op == OP_GET) {
 190                 getkeyspath(dbctx, from, to, 3);
 191         } else {
 192                 dofindpath(dbctx, from, to, true, 3);
 193         }
 194         destroyhash();
 195         dbctx->cleanupdb(dbctx);
 196         cleanuplogthing();
 197         cleanupconfig();
 198
 199         if (op != OP_GET) {
 200                 puts("<HR>");
 201                 puts("Produced by gpgwww " ONAK_VERSION ", part of onak. ");
 202                 end_html();
 203         }
 204
 205         cleanupcgi(cgiparams);
 206         cgiparams = NULL;
 207
 208         return EXIT_SUCCESS;
 209 }