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/*
* Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*-
* This is an implementation of the ASN1 Time structure which is:
* Time ::= CHOICE {
* utcTime UTCTime,
* generalTime GeneralizedTime }
*/
#include <stdio.h>
#include <time.h>
#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include "asn1_locl.h"
IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)
IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME)
ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t)
{
return ASN1_TIME_adj(s, t, 0, 0);
}
ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t,
int offset_day, long offset_sec)
{
struct tm *ts;
struct tm data;
ts = OPENSSL_gmtime(&t, &data);
if (ts == NULL) {
ASN1err(ASN1_F_ASN1_TIME_ADJ, ASN1_R_ERROR_GETTING_TIME);
return NULL;
}
if (offset_day || offset_sec) {
if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
return NULL;
}
if ((ts->tm_year >= 50) && (ts->tm_year < 150))
return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
}
int ASN1_TIME_check(const ASN1_TIME *t)
{
if (t->type == V_ASN1_GENERALIZEDTIME)
return ASN1_GENERALIZEDTIME_check(t);
else if (t->type == V_ASN1_UTCTIME)
return ASN1_UTCTIME_check(t);
return 0;
}
/* Convert an ASN1_TIME structure to GeneralizedTime */
ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(const ASN1_TIME *t,
ASN1_GENERALIZEDTIME **out)
{
ASN1_GENERALIZEDTIME *ret = NULL;
char *str;
int newlen;
if (!ASN1_TIME_check(t))
return NULL;
if (out == NULL || *out == NULL) {
if ((ret = ASN1_GENERALIZEDTIME_new()) == NULL)
goto err;
} else
ret = *out;
/* If already GeneralizedTime just copy across */
if (t->type == V_ASN1_GENERALIZEDTIME) {
if (!ASN1_STRING_set(ret, t->data, t->length))
goto err;
goto done;
}
/* grow the string */
if (!ASN1_STRING_set(ret, NULL, t->length + 2))
goto err;
/* ASN1_STRING_set() allocated 'len + 1' bytes. */
newlen = t->length + 2 + 1;
str = (char *)ret->data;
/* Work out the century and prepend */
if (t->data[0] >= '5')
OPENSSL_strlcpy(str, "19", newlen);
else
OPENSSL_strlcpy(str, "20", newlen);
OPENSSL_strlcat(str, (const char *)t->data, newlen);
done:
if (out != NULL && *out == NULL)
*out = ret;
return ret;
err:
if (out == NULL || *out != ret)
ASN1_GENERALIZEDTIME_free(ret);
return NULL;
}
int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
{
ASN1_TIME t;
t.length = strlen(str);
t.data = (unsigned char *)str;
t.flags = 0;
t.type = V_ASN1_UTCTIME;
if (!ASN1_TIME_check(&t)) {
t.type = V_ASN1_GENERALIZEDTIME;
if (!ASN1_TIME_check(&t))
return 0;
}
if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
return 0;
return 1;
}
static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t)
{
if (t == NULL) {
time_t now_t;
time(&now_t);
if (OPENSSL_gmtime(&now_t, tm))
return 1;
return 0;
}
if (t->type == V_ASN1_UTCTIME)
return asn1_utctime_to_tm(tm, t);
else if (t->type == V_ASN1_GENERALIZEDTIME)
return asn1_generalizedtime_to_tm(tm, t);
return 0;
}
int ASN1_TIME_diff(int *pday, int *psec,
const ASN1_TIME *from, const ASN1_TIME *to)
{
struct tm tm_from, tm_to;
if (!asn1_time_to_tm(&tm_from, from))
return 0;
if (!asn1_time_to_tm(&tm_to, to))
return 0;
return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to);
}
int ASN1_TIME_print(BIO *bp, const ASN1_TIME *tm)
{
if (tm->type == V_ASN1_UTCTIME)
return ASN1_UTCTIME_print(bp, tm);
if (tm->type == V_ASN1_GENERALIZEDTIME)
return ASN1_GENERALIZEDTIME_print(bp, tm);
BIO_write(bp, "Bad time value", 14);
return (0);
}
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