keyd.c

   1 /*
   2  * keyd.c - key retrieval daemon
   3  *
   4  * Jonathan McDowell <noodles@earth.li>
   5  *
   6  * Copyright 2004 Project Purple
   7  */
   8
   9 #include <fcntl.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <sys/socket.h>
  14 #include <sys/types.h>
  15 #include <sys/un.h>
  16 #include <unistd.h>
  17
  18 #include "charfuncs.h"
  19 #include "cleanup.h"
  20 #include "keyd.h"
  21 #include "keydb.h"
  22 #include "keyid.h"
  23 #include "keystructs.h"
  24 #include "log.h"
  25 #include "mem.h"
  26 #include "onak-conf.h"
  27 #include "parsekey.h"
  28
  29 void iteratefunc(void *ctx, struct openpgp_publickey *key)
  30 {
  31         struct openpgp_packet_list *packets = NULL;
  32         struct openpgp_packet_list *list_end = NULL;
  33         struct buffer_ctx           storebuf;
  34         int                         ret = 0;
  35         int                         fd = (int) ctx;
  36
  37         if (key != NULL) {
  38                 storebuf.offset = 0;
  39                 storebuf.size = 8192;
  40                 storebuf.buffer = malloc(8192);
  41
  42                 logthing(LOGTHING_TRACE,
  43                                 "Iterating over 0x%016llX.",
  44                                 get_keyid(key));
  45
  46                 flatten_publickey(key,
  47                                 &packets,
  48                                 &list_end);
  49                 write_openpgp_stream(buffer_putchar,
  50                                 &storebuf,
  51                                 packets);
  52                 logthing(LOGTHING_TRACE,
  53                                 "Sending %d bytes.",
  54                                 storebuf.offset);
  55                 ret = write(fd, &storebuf.offset,
  56                         sizeof(storebuf.offset));
  57                 if (ret != 0) {
  58                         write(fd, storebuf.buffer,
  59                                 storebuf.offset);
  60                 }
  61
  62                 free(storebuf.buffer);
  63                 storebuf.buffer = NULL;
  64                 storebuf.size = storebuf.offset = 0;
  65                 free_packet_list(packets);
  66                 packets = list_end = NULL;
  67         }
  68
  69         return;
  70 }
  71
  72 int sock_init(const char *sockname)
  73 {
  74         struct sockaddr_un sock;
  75         int                fd = -1;
  76         int                ret = -1;
  77
  78         fd = socket(PF_UNIX, SOCK_STREAM, 0);
  79         if (fd != -1) {
  80                 ret = fcntl(fd, F_SETFD, 1);
  81         }
  82
  83         if (ret != -1) {
  84                 sock.sun_family = AF_UNIX;
  85                 strncpy(sock.sun_path, sockname, sizeof(sock.sun_path) - 1);
  86                 unlink(sockname);
  87                 ret = bind(fd, (struct sockaddr *) &sock, sizeof(sock));
  88         }
  89
  90         if (ret != -1) {
  91                 ret = listen(fd, 5);
  92         }
  93
  94         return fd;
  95 }
  96
  97 int sock_do(int fd)
  98 {
  99         int      cmd = KEYD_CMD_UNKNOWN;
 100         ssize_t  bytes = 0;
 101         ssize_t  count = 0;
 102         int      ret = 0;
 103         uint64_t keyid = 0;
 104         char     *search = NULL;
 105         struct openpgp_publickey *key = NULL;
 106         struct openpgp_packet_list *packets = NULL;
 107         struct openpgp_packet_list *list_end = NULL;
 108         struct buffer_ctx storebuf;
 109
 110         /*
 111          * Get the command from the client.
 112          */
 113         bytes = read(fd, &cmd, sizeof(cmd));
 114
 115         logthing(LOGTHING_DEBUG, "Read %d bytes, command: %d", bytes, cmd);
 116
 117         if (bytes != sizeof(cmd)) {
 118                 ret = 1;
 119         }
 120
 121         if (ret == 0) {
 122                 switch (cmd) {
 123                 case KEYD_CMD_VERSION:
 124                         cmd = KEYD_REPLY_OK;
 125                         write(fd, &cmd, sizeof(cmd));
 126                         write(fd, &keyd_version, sizeof(keyd_version));
 127                         break;
 128                 case KEYD_CMD_GET:
 129                         cmd = KEYD_REPLY_OK;
 130                         write(fd, &cmd, sizeof(cmd));
 131                         bytes = read(fd, &keyid, sizeof(keyid));
 132                         if (bytes != sizeof(keyid)) {
 133                                 ret = 1;
 134                         }
 135                         storebuf.offset = 0;
 136                         if (ret == 0) {
 137                                 logthing(LOGTHING_INFO,
 138                                                 "Fetching 0x%llX, result: %d",
 139                                                 keyid,
 140                                                 fetch_key(keyid, &key, false));
 141                                 if (key != NULL) {
 142                                         storebuf.size = 8192;
 143                                         storebuf.buffer = malloc(8192);
 144
 145                                         flatten_publickey(key,
 146                                                         &packets,
 147                                                         &list_end);
 148                                         write_openpgp_stream(buffer_putchar,
 149                                                         &storebuf,
 150                                                         packets);
 151                                         logthing(LOGTHING_TRACE,
 152                                                         "Sending %d bytes.",
 153                                                         storebuf.offset);
 154                                         write(fd, &storebuf.offset,
 155                                                 sizeof(storebuf.offset));
 156                                         write(fd, storebuf.buffer,
 157                                                 storebuf.offset);
 158
 159                                         free(storebuf.buffer);
 160                                         storebuf.buffer = NULL;
 161                                         storebuf.size = storebuf.offset = 0;
 162                                         free_packet_list(packets);
 163                                         packets = list_end = NULL;
 164                                         free_publickey(key);
 165                                         key = NULL;
 166                                 } else {
 167                                         write(fd, &storebuf.offset,
 168                                                 sizeof(storebuf.offset));
 169                                 }
 170                         }
 171                         break;
 172                 case KEYD_CMD_GETTEXT:
 173                         cmd = KEYD_REPLY_OK;
 174                         write(fd, &cmd, sizeof(cmd));
 175                         bytes = read(fd, &count, sizeof(count));
 176                         if (bytes != sizeof(count)) {
 177                                 ret = 1;
 178                         }
 179                         storebuf.offset = 0;
 180                         if (ret == 0) {
 181                                 search = malloc(count+1);
 182                                 read(fd, search, count);
 183                                 search[count] = 0;
 184                                 logthing(LOGTHING_INFO,
 185                                                 "Fetching %s, result: %d",
 186                                                 search,
 187                                                 fetch_key_text(search, &key));
 188                                 if (key != NULL) {
 189                                         storebuf.size = 8192;
 190                                         storebuf.buffer = malloc(8192);
 191
 192                                         flatten_publickey(key,
 193                                                         &packets,
 194                                                         &list_end);
 195                                         write_openpgp_stream(buffer_putchar,
 196                                                         &storebuf,
 197                                                         packets);
 198                                         logthing(LOGTHING_TRACE,
 199                                                         "Sending %d bytes.",
 200                                                         storebuf.offset);
 201                                         write(fd, &storebuf.offset,
 202                                                 sizeof(storebuf.offset));
 203                                         write(fd, storebuf.buffer,
 204                                                 storebuf.offset);
 205
 206                                         free(storebuf.buffer);
 207                                         storebuf.buffer = NULL;
 208                                         storebuf.size = storebuf.offset = 0;
 209                                         free_packet_list(packets);
 210                                         packets = list_end = NULL;
 211                                         free_publickey(key);
 212                                         key = NULL;
 213                                 } else {
 214                                         write(fd, &storebuf.offset,
 215                                                 sizeof(storebuf.offset));
 216                                 }
 217                         }
 218                         break;
 219                 case KEYD_CMD_STORE:
 220                         cmd = KEYD_REPLY_OK;
 221                         write(fd, &cmd, sizeof(cmd));
 222                         storebuf.offset = 0;
 223                         bytes = read(fd, &storebuf.size,
 224                                         sizeof(storebuf.size));
 225                         logthing(LOGTHING_TRACE, "Reading %d bytes.",
 226                                         storebuf.size);
 227                         if (bytes != sizeof(storebuf.size)) {
 228                                 ret = 1;
 229                         }
 230                         if (ret == 0 && storebuf.size > 0) {
 231                                 storebuf.buffer = malloc(storebuf.size);
 232                                 bytes = count = 0;
 233                                 while (bytes >= 0 && count < storebuf.size) {
 234                                         bytes = read(fd,
 235                                                 &storebuf.buffer[count],
 236                                                 storebuf.size - count);
 237                                         logthing(LOGTHING_TRACE,
 238                                                         "Read %d bytes.",
 239                                                         bytes);
 240                                         count += bytes;
 241                                 }
 242                                 read_openpgp_stream(buffer_fetchchar,
 243                                                 &storebuf,
 244                                                 &packets,
 245                                                 0);
 246                                 parse_keys(packets, &key);
 247                                 store_key(key, false, false);
 248                                 free_packet_list(packets);
 249                                 packets = NULL;
 250                                 free_publickey(key);
 251                                 key = NULL;
 252                                 free(storebuf.buffer);
 253                                 storebuf.buffer = NULL;
 254                                 storebuf.size = storebuf.offset = 0;
 255                         }
 256                         break;
 257                 case KEYD_CMD_DELETE:
 258                         cmd = KEYD_REPLY_OK;
 259                         write(fd, &cmd, sizeof(cmd));
 260                         bytes = read(fd, &keyid, sizeof(keyid));
 261                         if (bytes != sizeof(keyid)) {
 262                                 ret = 1;
 263                         }
 264                         if (ret == 0) {
 265                                 logthing(LOGTHING_INFO,
 266                                                 "Deleting 0x%llX, result: %d",
 267                                                 keyid,
 268                                                 delete_key(keyid, false));
 269                         }
 270                         break;
 271                 case KEYD_CMD_GETFULLKEYID:
 272                         cmd = KEYD_REPLY_OK;
 273                         write(fd, &cmd, sizeof(cmd));
 274                         bytes = read(fd, &keyid, sizeof(keyid));
 275                         if (bytes != sizeof(keyid)) {
 276                                 ret = 1;
 277                         }
 278                         if (ret == 0) {
 279                                 keyid = getfullkeyid(keyid);
 280                                 write(fd, &keyid, sizeof(keyid));
 281                         }
 282                         break;
 283                 case KEYD_CMD_KEYITER:
 284                         cmd = KEYD_REPLY_OK;
 285                         write(fd, &cmd, sizeof(cmd));
 286                         iterate_keys(iteratefunc, (void *) fd);
 287                         bytes = 0;
 288                         write(fd, &bytes, sizeof(bytes));
 289                         break;
 290                 case KEYD_CMD_CLOSE:
 291                         ret = 1;
 292                         break;
 293                 case KEYD_CMD_QUIT:
 294                         trytocleanup();
 295                         break;
 296                 default:
 297                         logthing(LOGTHING_ERROR, "Got unknown command: %d",
 298                                         cmd);
 299                         cmd = KEYD_REPLY_UNKNOWN_CMD;
 300                         write(fd, &cmd, sizeof(cmd));
 301                 }
 302         }
 303
 304         return(ret);
 305 }
 306
 307 int sock_close(int fd)
 308 {
 309         return shutdown(fd, SHUT_RDWR);
 310 }
 311
 312 int sock_accept(int fd)
 313 {
 314         struct sockaddr_un sock;
 315         socklen_t          socklen;
 316         int    srv = -1;
 317         int    ret = -1;
 318
 319         socklen = sizeof(sock);
 320         srv = accept(fd, (struct sockaddr *) &sock, &socklen);
 321         if (srv != -1) {
 322                 ret = fcntl(srv, F_SETFD, 1);
 323         }
 324
 325         if (ret != -1) {
 326                 while (!sock_do(srv)) ;
 327                 sock_close(srv);
 328         }
 329
 330         return 1;
 331 }
 332
 333 int main(int argc, char *argv[])
 334 {
 335         int fd = -1;
 336         fd_set rfds;
 337         char sockname[1024];
 338
 339         readconfig(NULL);
 340         initlogthing("keyd", config.logfile);
 341
 342         catchsignals();
 343
 344         snprintf(sockname, 1023, "%s/%s", config.db_dir, KEYD_SOCKET);
 345         fd = sock_init(sockname);
 346
 347         if (fd != -1) {
 348                 FD_ZERO(&rfds);
 349                 FD_SET(fd, &rfds);
 350
 351                 initdb(false);
 352
 353                 logthing(LOGTHING_NOTICE, "Accepting connections.");
 354                 while (!cleanup() && select(fd + 1, &rfds, NULL, NULL, NULL) != -1) {
 355                         logthing(LOGTHING_INFO, "Accepted connection.");
 356                         sock_accept(fd);
 357                         FD_SET(fd, &rfds);
 358                 }
 359                 cleanupdb();
 360                 sock_close(fd);
 361                 unlink(sockname);
 362         }
 363
 364         cleanuplogthing();
 365         cleanupconfig();
 366
 367         return(EXIT_SUCCESS);
 368 }