onak.c

   1 /*
   2  * onak.c - An OpenPGP keyserver.
   3  *
   4  * This is the main swiss army knife binary.
   5  *
   6  * Copyright 2002 Jonathan McDowell <noodles@earth.li>
   7  *
   8  * This program is free software: you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the Free
  10  * Software Foundation; version 2 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program.  If not, see <https://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <fcntl.h>
  22 #include <getopt.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <unistd.h>
  29
  30 #include "build-config.h"
  31
  32 #include "armor.h"
  33 #include "charfuncs.h"
  34 #include "cleankey.h"
  35 #include "cleanup.h"
  36 #include "keydb.h"
  37 #include "keyid.h"
  38 #include "keyindex.h"
  39 #include "keystructs.h"
  40 #include "log.h"
  41 #include "mem.h"
  42 #include "merge.h"
  43 #include "onak-conf.h"
  44 #include "parsekey.h"
  45 #include "photoid.h"
  46
  47 void find_keys(struct onak_dbctx *dbctx,
  48                 char *search, uint64_t keyid,
  49                 struct openpgp_fingerprint *fingerprint,
  50                 bool ishex, bool isfp, bool dispfp, bool skshash,
  51                 bool exact, bool verbose)
  52 {
  53         struct openpgp_publickey *publickey = NULL;
  54         int count = 0;
  55
  56         if (ishex) {
  57                 count = dbctx->fetch_key_id(dbctx, keyid, &publickey,
  58                                 false);
  59         } else if (isfp && exact) {
  60                 count = dbctx->fetch_key(dbctx, fingerprint,
  61                                 &publickey, false);
  62         } else if (isfp && !exact) {
  63                 count = dbctx->fetch_key_fp(dbctx, fingerprint,
  64                                 &publickey, false);
  65         } else {
  66                 count = dbctx->fetch_key_text(dbctx, search, &publickey);
  67         }
  68         if (publickey != NULL) {
  69                 key_index(dbctx, publickey, verbose, dispfp, skshash,
  70                         false);
  71                 free_publickey(publickey);
  72         } else if (count == 0) {
  73                 puts("Key not found.");
  74         } else {
  75                 printf("Found %d keys, but maximum number to return is %d.\n",
  76                                 count,
  77                                 config.maxkeys);
  78                 puts("Try again with a more specific search.");
  79         }
  80 }
  81
  82 /**
  83  * @brief Context for the keyserver dumping function
  84  */
  85 struct dump_ctx {
  86         /** Keys we've dumped so far to this file */
  87         int count;
  88         /** Maximum keys to dump per file */
  89         int maxcount;
  90         /** File descriptor for the current dump file */
  91         int fd;
  92         /** Number of the current dump file */
  93         int filenum;
  94         /** Base filename to use for dump files */
  95         char *filebase;
  96 };
  97
  98 void dump_func(void *ctx, struct openpgp_publickey *key)
  99 {
 100         struct openpgp_packet_list *packets = NULL;
 101         struct openpgp_packet_list *list_end = NULL;
 102         struct dump_ctx *state;
 103         char filename[1024];
 104
 105         state = (struct dump_ctx *) ctx;
 106
 107         if (state->fd == -1 || state->count++ > state->maxcount) {
 108                 if (state->fd != -1) {
 109                         close(state->fd);
 110                         state->fd = -1;
 111                 }
 112                 snprintf(filename, 1023, state->filebase, state->filenum);
 113                 state->fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0640);
 114                 state->filenum++;
 115                 state->count = 0;
 116         }
 117         flatten_publickey(key, &packets, &list_end);
 118         write_openpgp_stream(file_putchar, &state->fd, packets);
 119         free_packet_list(packets);
 120         packets = list_end = NULL;
 121
 122         return;
 123 }
 124
 125 static uint8_t hex2bin(char c)
 126 {
 127         if (c >= '0' && c <= '9') {
 128                 return (c - '0');
 129         } else if (c >= 'a' && c <= 'f') {
 130                 return (c - 'a' + 10);
 131         } else if (c >= 'A' && c <= 'F') {
 132                 return (c - 'A' + 10);
 133         }
 134
 135         return 255;
 136 }
 137
 138 void usage(void) {
 139         puts("onak " ONAK_VERSION " - an OpenPGP keyserver.\n");
 140         puts("Usage:\n");
 141         puts("\tonak [options] <command> <parameters>\n");
 142         puts("\tCommands:\n");
 143         puts("\tadd      - read armored OpenPGP keys from stdin and add to the"
 144                 " keyserver");
 145         puts("\tclean    - read armored OpenPGP keys from stdin, run the"
 146                 " cleaning\n\t             routines against them and dump to"
 147                 " stdout");
 148         puts("\tdelete   - delete a given key from the keyserver");
 149         puts("\tdump     - dump all the keys from the keyserver to a file or"
 150                 " files\n\t           starting keydump*");
 151         puts("\tget      - retrieves the key requested from the keyserver");
 152         puts("\tgetphoto - retrieves the first photoid on the given key and"
 153                 " dumps to\n\t           stdout");
 154         puts("\tindex    - search for a key and list it");
 155         puts("\treindex  - retrieve and re-store a key in the backend db");
 156         puts("\tvindex   - search for a key and list it and its signatures");
 157 }
 158
 159 int main(int argc, char *argv[])
 160 {
 161         struct openpgp_packet_list      *packets = NULL;
 162         struct openpgp_packet_list      *list_end = NULL;
 163         struct openpgp_publickey        *keys = NULL;
 164         char                            *configfile = NULL;
 165         int                              rc = EXIT_SUCCESS;
 166         int                              result = 0;
 167         char                            *search = NULL;
 168         char                            *end = NULL;
 169         uint64_t                         keyid = 0;
 170         int                              i;
 171         bool                             exact = false;
 172         bool                             ishex = false;
 173         bool                             isfp = false;
 174         bool                             update = false;
 175         bool                             binary = false;
 176         bool                             dispfp = false;
 177         bool                             skshash = false;
 178         int                              optchar;
 179         struct dump_ctx                  dumpstate;
 180         struct skshash                   hash;
 181         struct onak_dbctx               *dbctx;
 182         struct openpgp_fingerprint       fingerprint;
 183
 184         while ((optchar = getopt(argc, argv, "bc:efsuv")) != -1 ) {
 185                 switch (optchar) {
 186                 case 'b':
 187                         binary = true;
 188                         break;
 189                 case 'c':
 190                         configfile = strdup(optarg);
 191                         break;
 192                 case 'e':
 193                         exact = true;
 194                         break;
 195                 case 'f':
 196                         dispfp = true;
 197                         break;
 198                 case 's':
 199                         skshash = true;
 200                         break;
 201                 case 'u':
 202                         update = true;
 203                         break;
 204                 case 'v':
 205                         setlogthreshold(LOGTHING_INFO);
 206                         break;
 207                 }
 208         }
 209
 210         readconfig(configfile);
 211         initlogthing("onak", config.logfile);
 212         catchsignals();
 213
 214         if ((argc - optind) < 1) {
 215                 usage();
 216         } else if (!strcmp("dump", argv[optind])) {
 217                 dbctx = config.dbinit(config.backend, true);
 218                 dumpstate.count = dumpstate.filenum = 0;
 219                 dumpstate.maxcount = 100000;
 220                 dumpstate.fd = -1;
 221                 dumpstate.filebase = "keydump.%d.pgp";
 222                 dbctx->iterate_keys(dbctx, dump_func, &dumpstate);
 223                 if (dumpstate.fd != -1) {
 224                         close(dumpstate.fd);
 225                         dumpstate.fd = -1;
 226                 }
 227                 dbctx->cleanupdb(dbctx);
 228         } else if (!strcmp("add", argv[optind])) {
 229                 if (binary) {
 230                         result = read_openpgp_stream(stdin_getchar, NULL,
 231                                  &packets, 0);
 232                         logthing(LOGTHING_INFO,
 233                                         "read_openpgp_stream: %d", result);
 234                 } else {
 235                         dearmor_openpgp_stream(stdin_getchar, NULL, &packets);
 236                 }
 237                 if (packets != NULL) {
 238                         result = parse_keys(packets, &keys);
 239                         free_packet_list(packets);
 240                         packets = NULL;
 241                         logthing(LOGTHING_INFO, "Finished reading %d keys.",
 242                                         result);
 243
 244                         dbctx = config.dbinit(config.backend, false);
 245                         result = cleankeys(dbctx, &keys,
 246                                         config.clean_policies);
 247                         logthing(LOGTHING_INFO, "%d keys cleaned.",
 248                                         result);
 249
 250                         logthing(LOGTHING_NOTICE, "Got %d new keys.",
 251                                         dbctx->update_keys(dbctx, &keys,
 252                                                 &config.blacklist,
 253                                                 (config.clean_policies &
 254                                                  ONAK_CLEAN_UPDATE_ONLY),
 255                                                 false));
 256                         if (keys != NULL && update) {
 257                                 flatten_publickey(keys,
 258                                         &packets,
 259                                         &list_end);
 260                                 if (binary) {
 261                                         write_openpgp_stream(stdout_putchar,
 262                                                         NULL,
 263                                                         packets);
 264                                 } else {
 265                                         armor_openpgp_stream(stdout_putchar,
 266                                                 NULL,
 267                                                 packets);
 268                                 }
 269                                 free_packet_list(packets);
 270                                 packets = NULL;
 271                         }
 272                         dbctx->cleanupdb(dbctx);
 273                 } else {
 274                         rc = 1;
 275                         logthing(LOGTHING_NOTICE, "No keys read.");
 276                 }
 277
 278                 if (keys != NULL) {
 279                         free_publickey(keys);
 280                         keys = NULL;
 281                 } else {
 282                         rc = 1;
 283                         logthing(LOGTHING_NOTICE, "No changes.");
 284                 }
 285         } else if (!strcmp("clean", argv[optind])) {
 286                 dbctx = config.dbinit(config.backend, true);
 287                 if (binary) {
 288                         result = read_openpgp_stream(stdin_getchar, NULL,
 289                                  &packets, 0);
 290                         logthing(LOGTHING_INFO,
 291                                         "read_openpgp_stream: %d", result);
 292                 } else {
 293                         dearmor_openpgp_stream(stdin_getchar, NULL, &packets);
 294                 }
 295
 296                 if (packets != NULL) {
 297                         result = parse_keys(packets, &keys);
 298                         free_packet_list(packets);
 299                         packets = NULL;
 300                         logthing(LOGTHING_INFO, "Finished reading %d keys.",
 301                                         result);
 302
 303                         if (keys != NULL) {
 304                                 result = cleankeys(dbctx, &keys,
 305                                                 config.clean_policies);
 306                                 logthing(LOGTHING_INFO, "%d keys cleaned.",
 307                                                 result);
 308
 309                                 flatten_publickey(keys,
 310                                         &packets,
 311                                         &list_end);
 312
 313                                 if (binary) {
 314                                         write_openpgp_stream(stdout_putchar,
 315                                                         NULL,
 316                                                         packets);
 317                                 } else {
 318                                         armor_openpgp_stream(stdout_putchar,
 319                                                 NULL,
 320                                                 packets);
 321                                 }
 322                                 free_packet_list(packets);
 323                                 packets = NULL;
 324                         }
 325                 } else {
 326                         rc = 1;
 327                         logthing(LOGTHING_NOTICE, "No keys read.");
 328                 }
 329
 330                 if (keys != NULL) {
 331                         free_publickey(keys);
 332                         keys = NULL;
 333                 }
 334                 dbctx->cleanupdb(dbctx);
 335         } else if (!strcmp("dumpconfig", argv[optind])) {
 336                 if ((argc - optind) == 2) {
 337                         writeconfig(argv[optind + 1]);
 338                 } else {
 339                         /* Dump config to stdout */
 340                         writeconfig(NULL);
 341                 }
 342         } else if ((argc - optind) == 2) {
 343                 search = argv[optind+1];
 344                 if (search != NULL && strlen(search) == 42 &&
 345                                 search[0] == '0' && search[1] == 'x') {
 346                         /* v4 fingerprint */
 347                         fingerprint.length = 20;
 348                         for (i = 0; i < 20; i++) {
 349                                 fingerprint.fp[i] =
 350                                         (hex2bin(search[2 + i * 2]) << 4) +
 351                                                 hex2bin(search[3 + i * 2]);
 352                         }
 353                         isfp = true;
 354                 } else if (search != NULL && strlen(search) == 66 &&
 355                                 search[0] == '0' && search[1] == 'x') {
 356                         /* v5 fingerprint */
 357                         fingerprint.length = 32;
 358                         for (i = 0; i < 32; i++) {
 359                                 fingerprint.fp[i] =
 360                                         (hex2bin(search[2 + i * 2]) << 4) +
 361                                                 hex2bin(search[3 + i * 2]);
 362                         }
 363                         isfp = true;
 364                 } else if (search != NULL) {
 365                         keyid = strtouq(search, &end, 16);
 366                         if (*search != 0 &&
 367                                         end != NULL &&
 368                                         *end == 0) {
 369                                 ishex = true;
 370                         }
 371                 }
 372                 dbctx = config.dbinit(config.backend, false);
 373                 if (!strcmp("index", argv[optind])) {
 374                         find_keys(dbctx, search, keyid, &fingerprint, ishex,
 375                                         isfp, dispfp, skshash,
 376                                         exact, false);
 377                 } else if (!strcmp("vindex", argv[optind])) {
 378                         find_keys(dbctx, search, keyid, &fingerprint, ishex,
 379                                         isfp, dispfp, skshash,
 380                                         exact, true);
 381                 } else if (!strcmp("getphoto", argv[optind])) {
 382                         if (!ishex) {
 383                                 puts("Can't get a key on uid text."
 384                                         " You must supply a keyid.");
 385                         } else if (dbctx->fetch_key_id(dbctx, keyid, &keys,
 386                                         false)) {
 387                                 unsigned char *photo = NULL;
 388                                 size_t         length = 0;
 389
 390                                 if (getphoto(keys, 0, &photo,
 391                                                 &length) == ONAK_E_OK) {
 392                                         fwrite(photo,
 393                                                 1,
 394                                                 length,
 395                                                 stdout);
 396                                 }
 397                                 free_publickey(keys);
 398                                 keys = NULL;
 399                         } else {
 400                                 puts("Key not found");
 401                         }
 402                 } else if (!strcmp("delete", argv[optind])) {
 403                         if (!isfp) {
 404                                 if (dbctx->fetch_key_id(dbctx, keyid, &keys,
 405                                                         false)) {
 406                                         get_fingerprint(keys->publickey,
 407                                                         &fingerprint);
 408                                         dbctx->delete_key(dbctx, &fingerprint,
 409                                                         false);
 410                                         free_publickey(keys);
 411                                         keys = NULL;
 412                                 }
 413                         } else
 414                                 dbctx->delete_key(dbctx, &fingerprint, false);
 415                 } else if (!strcmp("get", argv[optind])) {
 416                         if (!(ishex || isfp)) {
 417                                 puts("Can't get a key on uid text."
 418                                         " You must supply a keyid / "
 419                                         "fingerprint.");
 420                         } else if ((isfp &&
 421                                         dbctx->fetch_key_fp(dbctx,
 422                                                 &fingerprint,
 423                                                 &keys, false)) ||
 424                                         (ishex &&
 425                                         dbctx->fetch_key_id(dbctx, keyid,
 426                                                 &keys, false))) {
 427                                 logthing(LOGTHING_INFO, "Got key.");
 428                                 flatten_publickey(keys,
 429                                                 &packets,
 430                                                 &list_end);
 431                                 free_publickey(keys);
 432                                 if (binary) {
 433                                         write_openpgp_stream(stdout_putchar,
 434                                                 NULL,
 435                                                 packets);
 436                                 } else {
 437                                         armor_openpgp_stream(stdout_putchar,
 438                                                 NULL,
 439                                                 packets);
 440                                 }
 441                                 free_packet_list(packets);
 442                                 packets = NULL;
 443                         } else {
 444                                 puts("Key not found");
 445                         }
 446                 } else if (!strcmp("hget", argv[optind])) {
 447                         if (!parse_skshash(search, &hash)) {
 448                                 puts("Couldn't parse sks hash.");
 449                         } else if (dbctx->fetch_key_skshash(dbctx, &hash,
 450                                         &keys)) {
 451                                 logthing(LOGTHING_INFO, "Got key.");
 452                                 flatten_publickey(keys,
 453                                                 &packets,
 454                                                 &list_end);
 455                                 free_publickey(keys);
 456                                 if (binary) {
 457                                         write_openpgp_stream(stdout_putchar,
 458                                                 NULL,
 459                                                 packets);
 460                                 } else {
 461                                         armor_openpgp_stream(stdout_putchar,
 462                                                 NULL,
 463                                                 packets);
 464                                 }
 465                                 free_packet_list(packets);
 466                                 packets = NULL;
 467                         } else {
 468                                 puts("Key not found");
 469                         }
 470                 } else if (!strcmp("reindex", argv[optind])) {
 471                         dbctx->starttrans(dbctx);
 472                         if (dbctx->fetch_key_id(dbctx, keyid, &keys, true)) {
 473                                 get_fingerprint(keys->publickey, &fingerprint);
 474                                 dbctx->delete_key(dbctx, &fingerprint, true);
 475                                 cleankeys(dbctx, &keys, config.clean_policies);
 476                                 dbctx->store_key(dbctx, keys, true, false);
 477                         } else {
 478                                 puts("Key not found");
 479                         }
 480                         dbctx->endtrans(dbctx);
 481                 }
 482                 dbctx->cleanupdb(dbctx);
 483         } else {
 484                 usage();
 485         }
 486
 487         cleanuplogthing();
 488         cleanupconfig();
 489         free(configfile);
 490
 491         return rc;
 492 }