crypto/asn1/a_utctm.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 #include <stdio.h>
  11 #include <time.h>
  12 #include "internal/cryptlib.h"
  13 #include <openssl/asn1.h>
  14 #include "asn1_locl.h"
  15
  16 int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
  17 {
  18     /* wrapper around ans1_time_to_tm */
  19     if (d->type != V_ASN1_UTCTIME)
  20         return 0;
  21     return asn1_time_to_tm(tm, d);
  22 }
  23
  24 int ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
  25 {
  26     return asn1_utctime_to_tm(NULL, d);
  27 }
  28
  29 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
  30 {
  31     ASN1_UTCTIME t;
  32
  33     t.type = V_ASN1_UTCTIME;
  34     t.length = strlen(str);
  35     t.data = (unsigned char *)str;
  36     t.flags = 0;
  37
  38     if (ASN1_UTCTIME_check(&t)) {
  39         if (s != NULL) {
  40             if (!ASN1_STRING_set((ASN1_STRING *)s, str, t.length))
  41                 return 0;
  42             s->type = V_ASN1_UTCTIME;
  43         }
  44         return 1;
  45     }
  46     return 0;
  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     char *p;
  58     struct tm *ts;
  59     struct tm data;
  60     const size_t len = 20;
  61     int free_s = 0;
  62
  63     if (s == NULL) {
  64         s = ASN1_UTCTIME_new();
  65         if (s == NULL)
  66             goto err;
  67         free_s = 1;
  68     }
  69
  70     ts = OPENSSL_gmtime(&t, &data);
  71     if (ts == NULL)
  72         goto err;
  73
  74     if (offset_day || offset_sec) {
  75         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
  76             goto err;
  77     }
  78
  79     if ((ts->tm_year < 50) || (ts->tm_year >= 150))
  80         goto err;
  81
  82     p = (char *)s->data;
  83     if ((p == NULL) || ((size_t)s->length < len)) {
  84         p = OPENSSL_malloc(len);
  85         if (p == NULL) {
  86             ASN1err(ASN1_F_ASN1_UTCTIME_ADJ, ERR_R_MALLOC_FAILURE);
  87             goto err;
  88         }
  89         OPENSSL_free(s->data);
  90         s->data = (unsigned char *)p;
  91     }
  92
  93     s->length = BIO_snprintf(p, len, "%02d%02d%02d%02d%02d%02dZ",
  94                              ts->tm_year % 100, ts->tm_mon + 1, ts->tm_mday,
  95                              ts->tm_hour, ts->tm_min, ts->tm_sec);
  96     s->type = V_ASN1_UTCTIME;
  97 #ifdef CHARSET_EBCDIC_not
  98     ebcdic2ascii(s->data, s->data, s->length);
  99 #endif
 100     return s;
 101  err:
 102     if (free_s)
 103         ASN1_UTCTIME_free(s);
 104     return NULL;
 105 }
 106
 107 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t)
 108 {
 109     struct tm stm, ttm;
 110     int day, sec;
 111
 112     if (!asn1_utctime_to_tm(&stm, s))
 113         return -2;
 114
 115     if (!OPENSSL_gmtime(&t, &ttm))
 116         return -2;
 117
 118     if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm))
 119         return -2;
 120
 121     if (day > 0)
 122         return 1;
 123     if (day < 0)
 124         return -1;
 125     if (sec > 0)
 126         return 1;
 127     if (sec < 0)
 128         return -1;
 129     return 0;
 130 }
 131
 132 int ASN1_UTCTIME_print(BIO *bp, const ASN1_UTCTIME *tm)
 133 {
 134     const char *v;
 135     int gmt = 0;
 136     int i;
 137     int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
 138
 139     i = tm->length;
 140     v = (const char *)tm->data;
 141
 142     if (i < 10)
 143         goto err;
 144     if (v[i - 1] == 'Z')
 145         gmt = 1;
 146     for (i = 0; i < 10; i++)
 147         if ((v[i] > '9') || (v[i] < '0'))
 148             goto err;
 149     y = (v[0] - '0') * 10 + (v[1] - '0');
 150     if (y < 50)
 151         y += 100;
 152     M = (v[2] - '0') * 10 + (v[3] - '0');
 153     if ((M > 12) || (M < 1))
 154         goto err;
 155     d = (v[4] - '0') * 10 + (v[5] - '0');
 156     h = (v[6] - '0') * 10 + (v[7] - '0');
 157     m = (v[8] - '0') * 10 + (v[9] - '0');
 158     if (tm->length >= 12 &&
 159         (v[10] >= '0') && (v[10] <= '9') && (v[11] >= '0') && (v[11] <= '9'))
 160         s = (v[10] - '0') * 10 + (v[11] - '0');
 161
 162     if (BIO_printf(bp, "%s %2d %02d:%02d:%02d %d%s",
 163                    _asn1_mon[M - 1], d, h, m, s, y + 1900,
 164                    (gmt) ? " GMT" : "") <= 0)
 165         return 0;
 166     return 1;
 167  err:
 168     BIO_write(bp, "Bad time value", 14);
 169     return 0;
 170 }