crypto/asn1/a_gentm.c

   1 /*
   2  * Copyright 1995-2017 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 /*
  11  * GENERALIZEDTIME implementation. Based on UTCTIME
  12  */
  13
  14 #include <stdio.h>
  15 #include <time.h>
  16 #include "internal/cryptlib.h"
  17 #include <openssl/asn1.h>
  18 #include "asn1_locl.h"
  19
  20 /* This is the primary function used to parse ASN1_GENERALIZEDTIME */
  21 int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
  22 {
  23     /* wrapper around asn1_time_to_tm */
  24     if (d->type != V_ASN1_GENERALIZEDTIME)
  25         return 0;
  26     return asn1_time_to_tm(tm, d);
  27 }
  28
  29 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
  30 {
  31     return asn1_generalizedtime_to_tm(NULL, d);
  32 }
  33
  34 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
  35 {
  36     ASN1_GENERALIZEDTIME t;
  37
  38     t.type = V_ASN1_GENERALIZEDTIME;
  39     t.length = strlen(str);
  40     t.data = (unsigned char *)str;
  41     t.flags = 0;
  42
  43     if (!ASN1_GENERALIZEDTIME_check(&t))
  44         return 0;
  45
  46     if (s != NULL && !ASN1_STRING_copy(s, &t))
  47         return 0;
  48
  49     return 1;
  50 }
  51
  52 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
  53                                                time_t t)
  54 {
  55     return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
  56 }
  57
  58 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
  59                                                time_t t, int offset_day,
  60                                                long offset_sec)
  61 {
  62     struct tm *ts;
  63     struct tm data;
  64
  65     ts = OPENSSL_gmtime(&t, &data);
  66     if (ts == NULL)
  67         return NULL;
  68
  69     if (offset_day || offset_sec) {
  70         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
  71             return NULL;
  72     }
  73
  74     return asn1_time_from_tm(s, ts, V_ASN1_GENERALIZEDTIME);
  75 }
  76
  77 int ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
  78 {
  79     if (tm->type != V_ASN1_GENERALIZEDTIME)
  80         return 0;
  81     return ASN1_TIME_print(bp, tm);
  82 }