splitkeys.c

   1 /*
   2  * splitkeys.c - Split a keyring into smaller chunks.
   3  *
   4  * Copyright 2003 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 <fcntl.h>
  20 #include <stdio.h>
  21 #include <sys/stat.h>
  22 #include <sys/types.h>
  23 #include <unistd.h>
  24
  25 #include "charfuncs.h"
  26 #include "keystructs.h"
  27 #include "mem.h"
  28 #include "openpgp.h"
  29 #include "parsekey.h"
  30
  31 int main(int argc, char *argv[])
  32 {
  33         struct openpgp_packet_list      *packets = NULL;
  34         struct openpgp_packet_list      *list_end = NULL;
  35         struct openpgp_packet_list      *tmp = NULL;
  36         int                              maxkeys = 10000;
  37         int                              outfd = -1;
  38         int                              count = 0;
  39         char                             splitfile[1024];
  40
  41         if (argc > 1) {
  42                 maxkeys = atoi(argv[1]);
  43                 if (maxkeys == 0) {
  44                         fprintf(stderr,
  45                                 "Couldn't parse %s as a number of keys!\n",
  46                                 argv[1]);
  47                         exit(EXIT_FAILURE);
  48                 }
  49         }
  50
  51         do {
  52                 read_openpgp_stream(stdin_getchar, NULL,
  53                                  &packets, maxkeys);
  54                 if (packets != NULL) {
  55                         list_end = packets;
  56                         while (list_end->next != NULL) {
  57                                 tmp = list_end;
  58                                 list_end = list_end->next;
  59                                 if (list_end->next == NULL &&
  60                                         list_end->packet->tag ==
  61                                                 OPENPGP_PACKET_PUBLICKEY) {
  62                                         tmp->next = NULL;
  63                                 }
  64                         }
  65                         if (tmp != NULL && tmp->next != NULL) {
  66                                 list_end = NULL;
  67                         }
  68
  69                         snprintf(splitfile, 1023, "splitfile-%d.pgp", count);
  70                         outfd = open(splitfile, O_WRONLY | O_CREAT, 0664);
  71                         write_openpgp_stream(file_putchar, &outfd,
  72                                         packets);
  73                         close(outfd);
  74                         free_packet_list(packets);
  75                         packets = list_end;
  76                         count++;
  77                 }
  78         } while (packets != NULL);
  79
  80         return 0;
  81 }