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gmdifftest.c revision 1.1.1.1 
      1 /*
      2  * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the OpenSSL license (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 #include <openssl/crypto.h>
     11 #include <stdio.h>
     12 
     13 #define SECS_PER_DAY (24 * 60 * 60)
     14 
     15 /*
     16  * Time checking test code. Check times are identical for a wide range of
     17  * offsets. This should be run on a machine with 64 bit time_t or it will
     18  * trigger the very errors the routines fix.
     19  */
     20 
     21 static int check_time(long offset)
     22 {
     23     struct tm tm1, tm2, o1;
     24     int off_day, off_sec;
     25     long toffset;
     26     time_t t1, t2;
     27     time(&t1);
     28 
     29     t2 = t1 + offset;
     30     OPENSSL_gmtime(&t2, &tm2);
     31     OPENSSL_gmtime(&t1, &tm1);
     32     o1 = tm1;
     33     OPENSSL_gmtime_adj(&tm1, 0, offset);
     34     if ((tm1.tm_year != tm2.tm_year) ||
     35         (tm1.tm_mon != tm2.tm_mon) ||
     36         (tm1.tm_mday != tm2.tm_mday) ||
     37         (tm1.tm_hour != tm2.tm_hour) ||
     38         (tm1.tm_min != tm2.tm_min) || (tm1.tm_sec != tm2.tm_sec)) {
     39         fprintf(stderr, "TIME ERROR!!\n");
     40         fprintf(stderr, "Time1: %d/%d/%d, %d:%02d:%02d\n",
     41                 tm2.tm_mday, tm2.tm_mon + 1, tm2.tm_year + 1900,
     42                 tm2.tm_hour, tm2.tm_min, tm2.tm_sec);
     43         fprintf(stderr, "Time2: %d/%d/%d, %d:%02d:%02d\n",
     44                 tm1.tm_mday, tm1.tm_mon + 1, tm1.tm_year + 1900,
     45                 tm1.tm_hour, tm1.tm_min, tm1.tm_sec);
     46         return 0;
     47     }
     48     if (!OPENSSL_gmtime_diff(&off_day, &off_sec, &o1, &tm1))
     49         return 0;
     50     toffset = (long)off_day *SECS_PER_DAY + off_sec;
     51     if (offset != toffset) {
     52         fprintf(stderr, "TIME OFFSET ERROR!!\n");
     53         fprintf(stderr, "Expected %ld, Got %ld (%d:%d)\n",
     54                 offset, toffset, off_day, off_sec);
     55         return 0;
     56     }
     57     return 1;
     58 }
     59 
     60 int main(int argc, char **argv)
     61 {
     62     long offset;
     63     int fails;
     64 
     65     if (sizeof(time_t) < 8) {
     66         fprintf(stderr, "Skipping; time_t is less than 64-bits\n");
     67         return 0;
     68     }
     69     for (fails = 0, offset = 0; offset < 1000000; offset++) {
     70         if (!check_time(offset))
     71             fails++;
     72         if (!check_time(-offset))
     73             fails++;
     74         if (!check_time(offset * 1000))
     75             fails++;
     76         if (!check_time(-offset * 1000))
     77             fails++;
     78     }
     79 
     80     return fails ? 1 : 0;
     81 }
     82