lookup.c

   1 /*
   2  * lookup.c - CGI to lookup keys.
   3  *
   4  * Copyright 2002-2005,2007-2009,2011 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 <stdbool.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26 #include "armor.h"
  27 #include "charfuncs.h"
  28 #include "cleankey.h"
  29 #include "cleanup.h"
  30 #include "getcgi.h"
  31 #include "keydb.h"
  32 #include "keyid.h"
  33 #include "keyindex.h"
  34 #include "log.h"
  35 #include "mem.h"
  36 #include "onak-conf.h"
  37 #include "parsekey.h"
  38 #include "photoid.h"
  39 #include "version.h"
  40
  41 #define OP_UNKNOWN 0
  42 #define OP_GET     1
  43 #define OP_INDEX   2
  44 #define OP_VINDEX  3
  45 #define OP_PHOTO   4
  46 #define OP_HGET    5
  47
  48 void find_keys(struct onak_dbctx *dbctx,
  49                 char *search, uint64_t keyid,
  50                 struct openpgp_fingerprint *fingerprint,
  51                 bool ishex, bool isfp, bool dispfp, bool skshash,
  52                 bool exact, bool verbose, bool mrhkp)
  53 {
  54         struct openpgp_publickey *publickey = NULL;
  55         int count = 0;
  56
  57         if (ishex) {
  58                 count = dbctx->fetch_key_id(dbctx, keyid, &publickey,
  59                                 false);
  60         } else if (isfp) {
  61                 count = dbctx->fetch_key_fp(dbctx, fingerprint, &publickey,
  62                                 false);
  63         } else {
  64                 count = dbctx->fetch_key_text(dbctx, search, &publickey);
  65         }
  66         if (publickey != NULL) {
  67                 if (mrhkp) {
  68                         printf("info:1:%d\n", count);
  69                         mrkey_index(publickey);
  70                 } else {
  71                         key_index(dbctx, publickey, verbose, dispfp,
  72                                 skshash, true);
  73                 }
  74                 free_publickey(publickey);
  75         } else if (count == 0) {
  76                 if (mrhkp) {
  77                         puts("info:1:0");
  78                 } else {
  79                         puts("Key not found.");
  80                 }
  81         } else {
  82                 if (mrhkp) {
  83                         puts("info:1:0");
  84                 } else {
  85                         printf("Found %d keys, but maximum number to return"
  86                                 " is %d.\n",
  87                                 count,
  88                                 config.maxkeys);
  89                         puts("Try again with a more specific search.");
  90                 }
  91         }
  92 }
  93
  94 static uint8_t hex2bin(char c)
  95 {
  96         if (c >= '0' && c <= '9') {
  97                 return (c - '0');
  98         } else if (c >= 'a' && c <= 'f') {
  99                 return (c - 'a' + 10);
 100         } else if (c >= 'A' && c <= 'F') {
 101                 return (c - 'A' + 10);
 102         }
 103
 104         return 255;
 105 }
 106
 107 int main(int argc, char *argv[])
 108 {
 109         char **params = NULL;
 110         int op = OP_UNKNOWN;
 111         int i, j;
 112         int indx = 0;
 113         bool dispfp = false;
 114         bool skshash = false;
 115         bool exact = false;
 116         bool ishex = false;
 117         bool isfp = false;
 118         bool mrhkp = false;
 119         uint64_t keyid = 0;
 120         struct openpgp_fingerprint fingerprint;
 121         char *search = NULL;
 122         char *end = NULL;
 123         struct openpgp_publickey *publickey = NULL;
 124         struct openpgp_packet_list *packets = NULL;
 125         struct openpgp_packet_list *list_end = NULL;
 126         int result;
 127         struct skshash hash;
 128         struct onak_dbctx *dbctx;
 129
 130         params = getcgivars(argc, argv);
 131         for (i = 0; params != NULL && params[i] != NULL; i += 2) {
 132                 if (!strcmp(params[i], "op")) {
 133                         if (!strcmp(params[i+1], "get")) {
 134                                 op = OP_GET;
 135                         } else if (!strcmp(params[i+1], "hget")) {
 136                                 op = OP_HGET;
 137                         } else if (!strcmp(params[i+1], "index")) {
 138                                 op = OP_INDEX;
 139                         } else if (!strcmp(params[i+1], "vindex")) {
 140                                 op = OP_VINDEX;
 141                         } else if (!strcmp(params[i+1], "photo")) {
 142                                 op = OP_PHOTO;
 143                         }
 144                 } else if (!strcmp(params[i], "search")) {
 145                         search = params[i+1];
 146                         params[i+1] = NULL;
 147                         if (search != NULL && strlen(search) == 42 &&
 148                                         search[0] == '0' && search[1] == 'x') {
 149                                 fingerprint.length = MAX_FINGERPRINT_LEN;
 150                                 for (j = 0; j < MAX_FINGERPRINT_LEN; j++) {
 151                                         fingerprint.fp[j] = (hex2bin(
 152                                                         search[2 + j * 2])
 153                                                                 << 4) +
 154                                                 hex2bin(search[3 + j * 2]);
 155                                 }
 156                                 isfp = true;
 157                         } else if (search != NULL) {
 158                                 keyid = strtoull(search, &end, 16);
 159                                 if (*search != 0 &&
 160                                                 end != NULL &&
 161                                                 *end == 0) {
 162                                         ishex = true;
 163                                 }
 164                         }
 165                 } else if (!strcmp(params[i], "idx")) {
 166                         indx = atoi(params[i+1]);
 167                 } else if (!strcmp(params[i], "fingerprint")) {
 168                         if (!strcmp(params[i+1], "on")) {
 169                                 dispfp = true;
 170                         }
 171                 } else if (!strcmp(params[i], "hash")) {
 172                         if (!strcmp(params[i+1], "on")) {
 173                                 skshash = true;
 174                         }
 175                 } else if (!strcmp(params[i], "exact")) {
 176                         if (!strcmp(params[i+1], "on")) {
 177                                 exact = true;
 178                         }
 179                 } else if (!strcmp(params[i], "options")) {
 180                         /*
 181                          * TODO: We should be smarter about this; options may
 182                          * have several entries. For now mr is the only valid
 183                          * one though.
 184                          */
 185                         if (!strcmp(params[i+1], "mr")) {
 186                                 mrhkp = true;
 187                         }
 188                 }
 189                 free(params[i]);
 190                 params[i] = NULL;
 191                 if (params[i+1] != NULL) {
 192                         free(params[i+1]);
 193                         params[i+1] = NULL;
 194                 }
 195         }
 196         if (params != NULL) {
 197                 free(params);
 198                 params = NULL;
 199         }
 200
 201         if (mrhkp) {
 202                 puts("Content-Type: text/plain\n");
 203         } else if (op == OP_PHOTO) {
 204                 puts("Content-Type: image/jpeg\n");
 205         } else {
 206                 start_html("Lookup of key");
 207         }
 208
 209         if (op == OP_UNKNOWN) {
 210                 puts("Error: No operation supplied.");
 211         } else if (search == NULL) {
 212                 puts("Error: No key to search for supplied.");
 213         } else {
 214                 readconfig(NULL);
 215                 initlogthing("lookup", config.logfile);
 216                 catchsignals();
 217                 dbctx = config.dbinit(config.backend, false);
 218                 switch (op) {
 219                 case OP_GET:
 220                 case OP_HGET:
 221                         if (op == OP_HGET) {
 222                                 parse_skshash(search, &hash);
 223                                 result = dbctx->fetch_key_skshash(dbctx,
 224                                         &hash, &publickey);
 225                         } else if (ishex) {
 226                                 result = dbctx->fetch_key_id(dbctx, keyid,
 227                                         &publickey, false);
 228                         } else if (isfp) {
 229                                 result = dbctx->fetch_key_fp(dbctx,
 230                                         &fingerprint, &publickey, false);
 231                         } else {
 232                                 result = dbctx->fetch_key_text(dbctx,
 233                                         search,
 234                                         &publickey);
 235                         }
 236                         if (result) {
 237                                 logthing(LOGTHING_NOTICE,
 238                                         "Found %d key(s) for search %s",
 239                                         result,
 240                                         search);
 241                                 puts("<pre>");
 242                                 cleankeys(&publickey, config.clean_policies);
 243                                 flatten_publickey(publickey,
 244                                                         &packets,
 245                                                         &list_end);
 246                                 armor_openpgp_stream(stdout_putchar,
 247                                                 NULL,
 248                                                 packets);
 249                                 puts("</pre>");
 250                         } else {
 251                                 logthing(LOGTHING_NOTICE,
 252                                         "Failed to find key for search %s",
 253                                         search);
 254                                 puts("Key not found");
 255                         }
 256                         break;
 257                 case OP_INDEX:
 258                         find_keys(dbctx, search, keyid, &fingerprint,
 259                                         ishex, isfp, dispfp, skshash,
 260                                         exact, false, mrhkp);
 261                         break;
 262                 case OP_VINDEX:
 263                         find_keys(dbctx, search, keyid, &fingerprint,
 264                                         ishex, isfp, dispfp, skshash,
 265                                         exact, true, mrhkp);
 266                         break;
 267                 case OP_PHOTO:
 268                         if (isfp) {
 269                                 dbctx->fetch_key_fp(dbctx, &fingerprint,
 270                                         &publickey, false);
 271                         } else {
 272                                 dbctx->fetch_key_id(dbctx, keyid,
 273                                         &publickey, false);
 274                         }
 275                         if (publickey != NULL) {
 276                                 unsigned char *photo = NULL;
 277                                 size_t         length = 0;
 278
 279                                 if (getphoto(publickey, indx, &photo,
 280                                                 &length) == ONAK_E_OK) {
 281                                         fwrite(photo,
 282                                                         1,
 283                                                         length,
 284                                                         stdout);
 285                                 }
 286                                 free_publickey(publickey);
 287                                 publickey = NULL;
 288                         }
 289                         break;
 290                 default:
 291                         puts("Unknown operation!");
 292                 }
 293                 dbctx->cleanupdb(dbctx);
 294                 cleanuplogthing();
 295                 cleanupconfig();
 296         }
 297         if (!mrhkp) {
 298                 puts("<hr>");
 299                 puts("Produced by onak " ONAK_VERSION );
 300                 end_html();
 301         }
 302
 303         if (search != NULL) {
 304                 free(search);
 305                 search = NULL;
 306         }
 307
 308         return (EXIT_SUCCESS);
 309 }