crypto/asn1/a_gentm.c

   1 /*
   2  * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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_local.h"
  19 #include <openssl/asn1t.h>
  20
  21 IMPLEMENT_ASN1_DUP_FUNCTION(ASN1_GENERALIZEDTIME)
  22
  23 /* This is the primary function used to parse ASN1_GENERALIZEDTIME */
  24 int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
  25 {
  26     /* wrapper around asn1_time_to_tm */
  27     if (d->type != V_ASN1_GENERALIZEDTIME)
  28         return 0;
  29     return asn1_time_to_tm(tm, d);
  30 }
  31
  32 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
  33 {
  34     return asn1_generalizedtime_to_tm(NULL, d);
  35 }
  36
  37 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
  38 {
  39     ASN1_GENERALIZEDTIME t;
  40
  41     t.type = V_ASN1_GENERALIZEDTIME;
  42     t.length = strlen(str);
  43     t.data = (unsigned char *)str;
  44     t.flags = 0;
  45
  46     if (!ASN1_GENERALIZEDTIME_check(&t))
  47         return 0;
  48
  49     if (s != NULL && !ASN1_STRING_copy(s, &t))
  50         return 0;
  51
  52     return 1;
  53 }
  54
  55 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
  56                                                time_t t)
  57 {
  58     return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
  59 }
  60
  61 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
  62                                                time_t t, int offset_day,
  63                                                long offset_sec)
  64 {
  65     struct tm *ts;
  66     struct tm data;
  67
  68     ts = OPENSSL_gmtime(&t, &data);
  69     if (ts == NULL)
  70         return NULL;
  71
  72     if (offset_day || offset_sec) {
  73         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
  74             return NULL;
  75     }
  76
  77     return asn1_time_from_tm(s, ts, V_ASN1_GENERALIZEDTIME);
  78 }
  79
  80 int ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
  81 {
  82     if (tm->type != V_ASN1_GENERALIZEDTIME)
  83         return 0;
  84     return ASN1_TIME_print(bp, tm);
  85 }