crypto/asn1/a_time.c

   1 /* ====================================================================
   2  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  *
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in
  13  *    the documentation and/or other materials provided with the
  14  *    distribution.
  15  *
  16  * 3. All advertising materials mentioning features or use of this
  17  *    software must display the following acknowledgment:
  18  *    "This product includes software developed by the OpenSSL Project
  19  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  20  *
  21  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  22  *    endorse or promote products derived from this software without
  23  *    prior written permission. For written permission, please contact
  24  *    licensing@OpenSSL.org.
  25  *
  26  * 5. Products derived from this software may not be called "OpenSSL"
  27  *    nor may "OpenSSL" appear in their names without prior written
  28  *    permission of the OpenSSL Project.
  29  *
  30  * 6. Redistributions of any form whatsoever must retain the following
  31  *    acknowledgment:
  32  *    "This product includes software developed by the OpenSSL Project
  33  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  36  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  38  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  42  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  44  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  45  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  46  * OF THE POSSIBILITY OF SUCH DAMAGE.
  47  * ====================================================================
  48  *
  49  * This product includes cryptographic software written by Eric Young
  50  * (eay@cryptsoft.com).  This product includes software written by Tim
  51  * Hudson (tjh@cryptsoft.com).
  52  *
  53  */
  54
  55 /*-
  56  * This is an implementation of the ASN1 Time structure which is:
  57  *    Time ::= CHOICE {
  58  *      utcTime        UTCTime,
  59  *      generalTime    GeneralizedTime }
  60  * written by Steve Henson.
  61  */
  62
  63 #include <stdio.h>
  64 #include <time.h>
  65 #include "internal/cryptlib.h"
  66 #include <openssl/asn1t.h>
  67 #include "asn1_locl.h"
  68
  69 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
  70
  71 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
  72
  73 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
  74 {
  75     return ASN1_TIME_adj(s, t, 0, 0);
  76 }
  77
  78 ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t,
  79                          int offset_day, long offset_sec)
  80 {
  81     struct tm *ts;
  82     struct tm data;
  83
  84     ts = OPENSSL_gmtime(&t, &data);
  85     if (ts == NULL) {
  86         ASN1err(ASN1_F_ASN1_TIME_ADJ, ASN1_R_ERROR_GETTING_TIME);
  87         return NULL;
  88     }
  89     if (offset_day || offset_sec) {
  90         if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
  91             return NULL;
  92     }
  93     if ((ts->tm_year >= 50) && (ts->tm_year < 150))
  94         return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
  95     return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
  96 }
  97
  98 int ASN1_TIME_check(const ASN1_TIME *t)
  99 {
 100     if (t->type == V_ASN1_GENERALIZEDTIME)
 101         return ASN1_GENERALIZEDTIME_check(t);
 102     else if (t->type == V_ASN1_UTCTIME)
 103         return ASN1_UTCTIME_check(t);
 104     return 0;
 105 }
 106
 107 /* Convert an ASN1_TIME structure to GeneralizedTime */
 108 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t,
 109                                                    ASN1_GENERALIZEDTIME **out)
 110 {
 111     ASN1_GENERALIZEDTIME *ret;
 112     char *str;
 113     int newlen;
 114
 115     if (!ASN1_TIME_check(t))
 116         return NULL;
 117
 118     if (out == NULL || *out == NULL) {
 119         if ((ret = ASN1_GENERALIZEDTIME_new()) == NULL)
 120             return NULL;
 121         if (out)
 122             *out = ret;
 123     } else
 124         ret = *out;
 125
 126     /* If already GeneralizedTime just copy across */
 127     if (t->type == V_ASN1_GENERALIZEDTIME) {
 128         if (!ASN1_STRING_set(ret, t->data, t->length))
 129             return NULL;
 130         return ret;
 131     }
 132
 133     /* grow the string */
 134     if (!ASN1_STRING_set(ret, NULL, t->length + 2))
 135         return NULL;
 136     /* ASN1_STRING_set() allocated 'len + 1' bytes. */
 137     newlen = t->length + 2 + 1;
 138     str = (char *)ret->data;
 139     /* Work out the century and prepend */
 140     if (t->data[0] >= '5')
 141         OPENSSL_strlcpy(str, "19", newlen);
 142     else
 143         OPENSSL_strlcpy(str, "20", newlen);
 144
 145     OPENSSL_strlcat(str, (char *)t->data, newlen);
 146
 147     return ret;
 148 }
 149
 150 int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
 151 {
 152     ASN1_TIME t;
 153
 154     t.length = strlen(str);
 155     t.data = (unsigned char *)str;
 156     t.flags = 0;
 157
 158     t.type = V_ASN1_UTCTIME;
 159
 160     if (!ASN1_TIME_check(&t)) {
 161         t.type = V_ASN1_GENERALIZEDTIME;
 162         if (!ASN1_TIME_check(&t))
 163             return 0;
 164     }
 165
 166     if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
 167         return 0;
 168
 169     return 1;
 170 }
 171
 172 static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t)
 173 {
 174     if (t == NULL) {
 175         time_t now_t;
 176         time(&now_t);
 177         if (OPENSSL_gmtime(&now_t, tm))
 178             return 1;
 179         return 0;
 180     }
 181
 182     if (t->type == V_ASN1_UTCTIME)
 183         return asn1_utctime_to_tm(tm, t);
 184     else if (t->type == V_ASN1_GENERALIZEDTIME)
 185         return asn1_generalizedtime_to_tm(tm, t);
 186
 187     return 0;
 188 }
 189
 190 int ASN1_TIME_diff(int *pday, int *psec,
 191                    const ASN1_TIME *from, const ASN1_TIME *to)
 192 {
 193     struct tm tm_from, tm_to;
 194     if (!asn1_time_to_tm(&tm_from, from))
 195         return 0;
 196     if (!asn1_time_to_tm(&tm_to, to))
 197         return 0;
 198     return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to);
 199 }
 200
 201 int ASN1_TIME_print(BIO *bp, const ASN1_TIME *tm)
 202 {
 203     if (tm->type == V_ASN1_UTCTIME)
 204         return ASN1_UTCTIME_print(bp, tm);
 205     if (tm->type == V_ASN1_GENERALIZEDTIME)
 206         return ASN1_GENERALIZEDTIME_print(bp, tm);
 207     BIO_write(bp, "Bad time value", 14);
 208     return (0);
 209 }