src/test-signature.c

   1 /*
   2         libloc - A library to determine the location of someone on the Internet
   3
   4         Copyright (C) 2019 IPFire Development Team <info@ipfire.org>
   5
   6         This program is free software; you can redistribute it and/or modify
   7         it under the terms of the GNU General Public License as published by
   8         the Free Software Foundation; either version 2 of the License, or
   9         (at your option) any later version.
  10
  11         This program is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14         GNU General Public License for more details.
  15 */
  16
  17 #include <stdio.h>
  18 #include <stddef.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <fcntl.h>
  22 #include <ctype.h>
  23 #include <errno.h>
  24 #include <unistd.h>
  25
  26 #include <loc/libloc.h>
  27 #include <loc/database.h>
  28 #include <loc/writer.h>
  29
  30 int main(int argc, char** argv) {
  31         int err;
  32
  33         // Open public key
  34         FILE* public_key = fopen(ABS_SRCDIR "/examples/public-key.pem", "r");
  35         if (!public_key) {
  36                 fprintf(stderr, "Could not open public key file: %s\n", strerror(errno));
  37                 exit(EXIT_FAILURE);
  38         }
  39
  40         // Open private key
  41         FILE* private_key = fopen(ABS_SRCDIR "/examples/private-key.pem", "r");
  42         if (!private_key) {
  43                 fprintf(stderr, "Could not open private key file: %s\n", strerror(errno));
  44                 exit(EXIT_FAILURE);
  45         }
  46
  47         struct loc_ctx* ctx;
  48         err = loc_new(&ctx);
  49         if (err < 0)
  50                 exit(EXIT_FAILURE);
  51
  52         // Create an empty database
  53         struct loc_writer* writer;
  54         err = loc_writer_new(ctx, &writer, private_key);
  55         if (err < 0)
  56                 exit(EXIT_FAILURE);
  57
  58         FILE* f = fopen("test.db", "w+");
  59         if (!f) {
  60                 fprintf(stderr, "Could not open file for writing: %s\n", strerror(errno));
  61                 exit(EXIT_FAILURE);
  62         }
  63
  64         err = loc_writer_write(writer, f);
  65         if (err) {
  66                 fprintf(stderr, "Could not write database: %s\n", strerror(err));
  67                 exit(EXIT_FAILURE);
  68         }
  69         loc_writer_unref(writer);
  70
  71         // Close the file
  72         fclose(f);
  73
  74         // And open it again from disk
  75         f = fopen("test.db", "r");
  76         if (!f) {
  77                 fprintf(stderr, "Could not open file for reading: %s\n", strerror(errno));
  78                 exit(EXIT_FAILURE);
  79         }
  80
  81         struct loc_database* db;
  82         err = loc_database_new(ctx, &db, f);
  83         if (err) {
  84                 fprintf(stderr, "Could not open database: %s\n", strerror(-err));
  85                 exit(EXIT_FAILURE);
  86         }
  87
  88         // Verify the database signature
  89         err = loc_database_verify(db, public_key);
  90         if (err) {
  91                 fprintf(stderr, "Could not verify the database: %d\n", err);
  92                 exit(EXIT_FAILURE);
  93         }
  94
  95         // Open another public key
  96         public_key = freopen(ABS_SRCDIR "/src/signing-key.pem", "r", public_key);
  97         if (!public_key) {
  98                 fprintf(stderr, "Could not open public key file: %s\n", strerror(errno));
  99                 exit(EXIT_FAILURE);
 100         }
 101
 102         // Verify with an incorrect key
 103         err = loc_database_verify(db, public_key);
 104         if (err == 0) {
 105                 fprintf(stderr, "Database was verified with an incorrect key: %d\n", err);
 106                 exit(EXIT_FAILURE);
 107         }
 108
 109         // Close the database
 110         loc_database_unref(db);
 111
 112         loc_unref(ctx);
 113
 114         fclose(private_key);
 115         fclose(public_key);
 116
 117         return EXIT_SUCCESS;
 118 }