crypto/asn1/a_utctm.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 #include <stdio.h>
  11 #include <time.h>
  12 #include "internal/cryptlib.h"
  13 #include <openssl/asn1.h>
  14 #include "asn1_local.h"
  15
  16 /* This is the primary function used to parse ASN1_UTCTIME */
  17 int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
  18 {
  19     /* wrapper around asn1_time_to_tm */
  20     if (d->type != V_ASN1_UTCTIME)
  21         return 0;
  22     return asn1_time_to_tm(tm, d);
  23 }
  24
  25 int ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
  26 {
  27     return asn1_utctime_to_tm(NULL, d);
  28 }
  29
  30 /* Sets the string via simple copy without cleaning it up */
  31 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
  32 {
  33     ASN1_UTCTIME t;
  34
  35     t.type = V_ASN1_UTCTIME;
  36     t.length = strlen(str);
  37     t.data = (unsigned char *)str;
  38     t.flags = 0;
  39
  40     if (!ASN1_UTCTIME_check(&t))
  41         return 0;
  42
  43     if (s != NULL && !ASN1_STRING_copy(s, &t))
  44         return 0;
  45
  46     return 1;
  47 }
  48
  49 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
  50 {
  51     return ASN1_UTCTIME_adj(s, t, 0, 0);
  52 }
  53
  54 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t,
  55                                int offset_day, long offset_sec)
  56 {
  57     struct tm *ts;
  58     struct tm data;
  59
  60     ts = OPENSSL_gmtime(&t, &data);
  61     if (ts == NULL)
  62         return NULL;
  63
  64     if (offset_day || offset_sec) {
  65         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
  66             return NULL;
  67     }
  68
  69     return asn1_time_from_tm(s, ts, V_ASN1_UTCTIME);
  70 }
  71
  72 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
  73 {
  74     struct tm stm, ttm;
  75     int day, sec;
  76
  77     if (!asn1_utctime_to_tm(&stm, s))
  78         return -2;
  79
  80     if (OPENSSL_gmtime(&t, &ttm) == NULL)
  81         return -2;
  82
  83     if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm))
  84         return -2;
  85
  86     if (day > 0 || sec > 0)
  87         return 1;
  88     if (day < 0 || sec < 0)
  89         return -1;
  90     return 0;
  91 }
  92
  93 int ASN1_UTCTIME_print(BIO *bp, const ASN1_UTCTIME *tm)
  94 {
  95     if (tm->type != V_ASN1_UTCTIME)
  96         return 0;
  97     return ASN1_TIME_print(bp, tm);
  98 }