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 "cleanup.h"
  17 #include "config.h"
  18 #include "getcgi.h"
  19 #include "hash.h"
  20 #include "keydb.h"
  21 #include "log.h"
  22 #include "mem.h"
  23 #include "onak-conf.h"
  24 #include "parsekey.h"
  25 #include "stats.h"
  26
  27 #define OP_UNKNOWN 0
  28 #define OP_GET     1
  29
  30 int parsecgistuff(char **cgiparams, uint64_t *from, uint64_t *to)
  31 {
  32         int i = 0;
  33         int op = OP_UNKNOWN;
  34
  35         if (cgiparams != NULL) {
  36                 i = 0;
  37                 while (cgiparams[i] != NULL) {
  38                         if (!strcmp(cgiparams[i], "to")) {
  39                                 *to = strtoul(cgiparams[i+1], NULL, 16);
  40                         } else if (!strcmp(cgiparams[i], "from")) {
  41                                 *from = strtoul(cgiparams[i+1], NULL, 16);
  42                         } else if (!strcmp(cgiparams[i], "op")) {
  43                                 if (!strcmp(cgiparams[i+1], "get")) {
  44                                         op = OP_GET;
  45                                 }
  46                         }
  47                         i += 2;
  48                 }
  49         }
  50
  51         return op;
  52 }
  53
  54 int getkeyspath(uint64_t have, uint64_t want, int count)
  55 {
  56         struct openpgp_publickey *publickey = NULL;
  57         struct openpgp_packet_list *packets = NULL;
  58         struct openpgp_packet_list *list_end = NULL;
  59         struct stats_key *keyinfoa, *keyinfob, *curkey;
  60         uint64_t fullhave, fullwant;
  61         int rec;
  62         int pathlen = 0;
  63
  64         fullhave = getfullkeyid(have);
  65         fullwant = getfullkeyid(want);
  66
  67         /*
  68          * Make sure the keys we have and want are in the cache.
  69          */
  70         cached_getkeysigs(fullhave);
  71         cached_getkeysigs(fullwant);
  72
  73         if ((keyinfoa = findinhash(fullhave)) == NULL) {
  74                 return 1;
  75         }
  76         if ((keyinfob = findinhash(fullwant)) == NULL) {
  77                 return 1;
  78         }
  79
  80         while ((!cleanup()) && (pathlen < count)) {
  81                 /*
  82                  * Fill the tree info up.
  83                  */
  84                 initcolour(true);
  85                 rec = findpath(keyinfoa, keyinfob);
  86                 keyinfob->parent = 0;
  87                 if (keyinfoa->colour == 0) {
  88                         pathlen = count;
  89                 } else {
  90                         /*
  91                          * Skip the first key, as the remote user will already
  92                          * have it
  93                          */
  94                         curkey = findinhash(keyinfoa->parent);
  95                         while (curkey != NULL && curkey->keyid != 0) {
  96                                 if (curkey->keyid != fullwant && fetch_key(
  97                                                 curkey->keyid,
  98                                                         &publickey, false)) {
  99                                         flatten_publickey(publickey,
 100                                                         &packets,
 101                                                         &list_end);
 102                                         free_publickey(publickey);
 103                                         publickey = NULL;
 104                                 }
 105                                 if (curkey != keyinfoa && curkey != keyinfob) {
 106                                         curkey->disabled = true;
 107                                 }
 108                                 curkey = findinhash(curkey->parent);
 109                         }
 110                 }
 111                 pathlen++;
 112         }
 113
 114         /*
 115          * Add the destination key to the list of returned keys.
 116          */
 117         if (fetch_key(fullwant, &publickey, false)) {
 118                 flatten_publickey(publickey,
 119                                 &packets,
 120                                 &list_end);
 121                 free_publickey(publickey);
 122                 publickey = NULL;
 123         }
 124
 125         armor_openpgp_stream(stdout_putchar, NULL, packets);
 126         free_packet_list(packets);
 127         packets = list_end = NULL;
 128
 129         return 0;
 130 }
 131
 132 int main(int argc, char *argv[])
 133 {
 134         char     **cgiparams = NULL;    /* Our CGI parameter block */
 135         uint64_t   from = 0, to = 0;
 136         int        op = OP_UNKNOWN;
 137
 138         cgiparams = getcgivars(argc, argv);
 139
 140
 141         op = parsecgistuff(cgiparams, &from, &to);
 142
 143         if (op != OP_GET) {
 144                 start_html("Experimental PGP key path finder results");
 145         } else {
 146                 puts("Content-Type: text/plain\n");
 147         }
 148
 149         if (from == 0 || to == 0) {
 150                 printf("Must pass from & to\n");
 151                 puts("</HTML>");
 152                 exit(1);
 153         }
 154
 155         if (op != OP_GET) {
 156                 printf("<P>Looking for path from 0x%llX to 0x%llX.\n",
 157                                 from, to);
 158                 printf("<A HREF=\"gpgwww?from=0x%08llX&to=0x%08llX\">"
 159                                 "Find reverse path</A>\n",
 160                                 to,
 161                                 from);
 162                 printf("<A HREF=\"gpgwww?from=0x%08llX&to=0x%08llX&op=get\">"
 163                                 "Get all keys listed</A></P>\n",
 164                                 from,
 165                                 to);
 166         }
 167
 168         readconfig(NULL);
 169         initlogthing("gpgwww", config.logfile);
 170         catchsignals();
 171         initdb(true);
 172         inithash();
 173         logthing(LOGTHING_NOTICE, "Looking for path from 0x%llX to 0x%llX.",
 174                         from,
 175                         to);
 176         if (op == OP_GET) {
 177                 getkeyspath(from, to, 3);
 178         } else {
 179                 dofindpath(from, to, true, 3);
 180         }
 181         destroyhash();
 182         cleanupdb();
 183         cleanuplogthing();
 184         cleanupconfig();
 185
 186         if (op != OP_GET) {
 187                 puts("<HR>");
 188                 puts("Produced by gpgwww " PACKAGE_VERSION ", part of onak. "
 189                         "<A HREF=\"mailto:noodles-onak@earth.li\">"
 190                         "Jonathan McDowell</A>");
 191                 end_html();
 192         }
 193
 194         cleanupcgi(cgiparams);
 195         cgiparams = NULL;
 196
 197         return EXIT_SUCCESS;
 198 }