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 <ctype.h>
  17 #include "internal/cryptlib.h"
  18 #include <openssl/asn1.h>
  19 #include "asn1_locl.h"
  20
  21 /* This is the primary function used to parse ASN1_GENERALIZEDTIME */
  22 int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
  23 {
  24     /* wrapper around asn1_time_to_tm */
  25     if (d->type != V_ASN1_GENERALIZEDTIME)
  26         return 0;
  27     return asn1_time_to_tm(tm, d);
  28 }
  29
  30 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
  31 {
  32     return asn1_generalizedtime_to_tm(NULL, d);
  33 }
  34
  35 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
  36 {
  37     ASN1_GENERALIZEDTIME t;
  38
  39     t.type = V_ASN1_GENERALIZEDTIME;
  40     t.length = strlen(str);
  41     t.data = (unsigned char *)str;
  42     t.flags = 0;
  43
  44     if (!ASN1_GENERALIZEDTIME_check(&t))
  45         return 0;
  46
  47     if (s != NULL && !ASN1_STRING_copy(s, &t))
  48         return 0;
  49
  50     return 1;
  51 }
  52
  53 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s,
  54                                                time_t t)
  55 {
  56     return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0);
  57 }
  58
  59 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s,
  60                                                time_t t, int offset_day,
  61                                                long offset_sec)
  62 {
  63     struct tm *ts;
  64     struct tm data;
  65
  66     ts = OPENSSL_gmtime(&t, &data);
  67     if (ts == NULL)
  68         return NULL;
  69
  70     if (offset_day || offset_sec) {
  71         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
  72             return NULL;
  73     }
  74
  75     return asn1_time_from_tm(s, ts, V_ASN1_GENERALIZEDTIME);
  76 }
  77
  78 int ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
  79 {
  80     if (tm->type != V_ASN1_GENERALIZEDTIME)
  81         return 0;
  82     return ASN1_TIME_print(bp, tm);
  83 }