src/checksum/checksum_builder.c

   1 /*
   2  * Copyright (C) 2009 Martin Willi
   3  * Hochschule fuer Technik Rapperswil, Switzerland
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include <stdlib.h>
  17 #include <stdio.h>
  18 #include <dlfcn.h>
  19
  20 #include <library.h>
  21
  22 /* we need to fake some charon symbols to dlopen() its plugins */
  23 void *eap_type_names, *auth_class_names, *charon, *protocol_id_names,
  24 *action_names, *ipsec_mode_names, *ike_sa_state_names, *child_sa_state_names,
  25 *proposal_create_default, *peer_cfg_create, *ike_cfg_create, *child_cfg_create,
  26 *traffic_selector_create_dynamic, *callback_job_create, *delete_ike_sa_job_create,
  27 *eap_type_from_string, *auth_cfg_create, *proposal_create_from_string,
  28 *traffic_selector_create_from_subnet, *traffic_selector_create_from_bytes,
  29 *eap_payload_create_data, *ike_sa_create, *child_sa_create, *policy_dir_names,
  30 *controller_cb_empty, *proposal_create, *ipcomp_transform_names,
  31 *traffic_selector_create_from_string, *update_sa_job_create, *ike_sa_id_create,
  32 *rekey_child_sa_job_create, *roam_job_create, *migrate_job_create,
  33 *acquire_job_create, *delete_child_sa_job_create, *debug_names;
  34
  35 int main(int argc, char* argv[])
  36 {
  37         int i;
  38         integrity_checker_t *integrity;
  39
  40         /* avoid confusing leak reports in build process */
  41         setenv("LEAK_DETECTIVE_DISABLE", "1", 0);
  42         library_init(NULL);
  43         atexit(library_deinit);
  44
  45         integrity = integrity_checker_create(NULL);
  46
  47         printf("/**\n");
  48         printf(" * checksums of files and loaded code segments.\n");
  49         printf(" * created by %s\n", argv[0]);
  50         printf(" */\n");
  51         printf("\n");
  52         printf("#include <library.h>\n");
  53         printf("\n");
  54         printf("integrity_checksum_t checksums[] = {\n");
  55         for (i = 1; i < argc; i++)
  56         {
  57                 char *name, *path, *sname;
  58                 void *handle, *symbol;
  59                 u_int32_t fsum, ssum;
  60
  61                 path = argv[i];
  62
  63                 if ((name = strstr(path, "libstrongswan-")))
  64                 {
  65                         name = strdup(name + strlen("libstrongswan-"));
  66                         name[strlen(name) - 3] = '"';
  67                         name[strlen(name) - 2] = ',';
  68                         name[strlen(name) - 1] = '\0';
  69                         sname = "plugin_create";
  70                 }
  71                 else if (strstr(path, "libstrongswan.so"))
  72                 {
  73                         name = strdup("libstrongswan\",");
  74                         sname = "library_init";
  75                 }
  76                 else
  77                 {
  78                         fprintf(stderr, "don't know how to handle '%s', ignored", path);
  79                         continue;
  80                 }
  81
  82                 fsum = integrity->build_file(integrity, path);
  83                 ssum = 0;
  84                 handle = dlopen(path, RTLD_LAZY);
  85                 if (handle)
  86                 {
  87                         symbol = dlsym(handle, sname);
  88                         if (symbol)
  89                         {
  90                                 ssum = integrity->build_segment(integrity, symbol);
  91                         }
  92                         else
  93                         {
  94                                 fprintf(stderr, "symbol lookup failed: %s\n", dlerror());
  95                         }
  96                         dlclose(handle);
  97                 }
  98                 else
  99                 {
 100                         fprintf(stderr, "dlopen failed: %s\n", dlerror());
 101                 }
 102
 103                 printf("\t{\"%-20s0x%08x, 0x%08x},\n", name, fsum, ssum);
 104                 free(name);
 105         }
 106         printf("};\n");
 107         printf("\n");
 108         printf("int checksum_count = countof(checksums);\n");
 109         printf("\n");
 110         integrity->destroy(integrity);
 111
 112         exit(0);
 113 }
 114