crypto/asn1/a_gentm.c

   1 /*
   2  * Copyright 1995-2021 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 static int asn1_generalizedtime_to_tm(struct tm *tm,
  25                                       const ASN1_GENERALIZEDTIME *d)
  26 {
  27     /* wrapper around ossl_asn1_time_to_tm */
  28     if (d->type != V_ASN1_GENERALIZEDTIME)
  29         return 0;
  30     return ossl_asn1_time_to_tm(tm, d);
  31 }
  32
  33 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
  34 {
  35     return asn1_generalizedtime_to_tm(NULL, d);
  36 }
  37
  38 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
  39 {
  40     ASN1_GENERALIZEDTIME t;
  41
  42     t.type = V_ASN1_GENERALIZEDTIME;
  43     t.length = strlen(str);
  44     t.data = (unsigned char *)str;
  45     t.flags = 0;
  46
  47     if (!ASN1_GENERALIZEDTIME_check(&t))
  48         return 0;
  49
  50     if (s != NULL && !ASN1_STRING_copy(s, &t))
  51         return 0;
  52
  53     return 1;
  54 }
  55
  56 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
  57                                                time_t t)
  58 {
  59     return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
  60 }
  61
  62 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
  63                                                time_t t, int offset_day,
  64                                                long offset_sec)
  65 {
  66     struct tm *ts;
  67     struct tm data;
  68
  69     ts = OPENSSL_gmtime(&t, &data);
  70     if (ts == NULL)
  71         return NULL;
  72
  73     if (offset_day || offset_sec) {
  74         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
  75             return NULL;
  76     }
  77
  78     return ossl_asn1_time_from_tm(s, ts, V_ASN1_GENERALIZEDTIME);
  79 }
  80
  81 int ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
  82 {
  83     if (tm->type != V_ASN1_GENERALIZEDTIME)
  84         return 0;
  85     return ASN1_TIME_print(bp, tm);
  86 }