pineapple/externals/libressl/crypto/asn1/a_time_tm.c

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2020-12-28 16:15:37 +01:00
/* $OpenBSD: a_time_tm.c,v 1.15 2018/04/25 11:48:21 tb Exp $ */
/*
* Copyright (c) 2015 Bob Beck <beck@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <openssl/asn1t.h>
#include <openssl/err.h>
#include "o_time.h"
#define RFC5280 0
#define GENTIME_LENGTH 15
#define UTCTIME_LENGTH 13
int
ASN1_time_tm_cmp(struct tm *tm1, struct tm *tm2)
{
if (tm1->tm_year < tm2->tm_year)
return (-1);
if (tm1->tm_year > tm2->tm_year)
return (1);
if (tm1->tm_mon < tm2->tm_mon)
return (-1);
if (tm1->tm_mon > tm2->tm_mon)
return (1);
if (tm1->tm_mday < tm2->tm_mday)
return (-1);
if (tm1->tm_mday > tm2->tm_mday)
return (1);
if (tm1->tm_hour < tm2->tm_hour)
return (-1);
if (tm1->tm_hour > tm2->tm_hour)
return (1);
if (tm1->tm_min < tm2->tm_min)
return (-1);
if (tm1->tm_min > tm2->tm_min)
return (1);
if (tm1->tm_sec < tm2->tm_sec)
return (-1);
if (tm1->tm_sec > tm2->tm_sec)
return (1);
return 0;
}
int
ASN1_time_tm_clamp_notafter(struct tm *tm)
{
#ifdef SMALL_TIME_T
struct tm broken_os_epoch_tm;
time_t broken_os_epoch_time = INT_MAX;
if (gmtime_r(&broken_os_epoch_time, &broken_os_epoch_tm) == NULL)
return 0;
if (ASN1_time_tm_cmp(tm, &broken_os_epoch_tm) == 1)
memcpy(tm, &broken_os_epoch_tm, sizeof(*tm));
#endif
return 1;
}
/* Format a time as an RFC 5280 format Generalized time */
char *
gentime_string_from_tm(struct tm *tm)
{
char *ret = NULL;
int year;
year = tm->tm_year + 1900;
if (year < 0 || year > 9999)
return (NULL);
if (asprintf(&ret, "%04u%02u%02u%02u%02u%02uZ", year,
tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min,
tm->tm_sec) == -1)
ret = NULL;
return (ret);
}
/* Format a time as an RFC 5280 format UTC time */
char *
utctime_string_from_tm(struct tm *tm)
{
char *ret = NULL;
if (tm->tm_year >= 150 || tm->tm_year < 50)
return (NULL);
if (asprintf(&ret, "%02u%02u%02u%02u%02u%02uZ",
tm->tm_year % 100, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec) == -1)
ret = NULL;
return (ret);
}
/* Format a time correctly for an X509 object as per RFC 5280 */
char *
rfc5280_string_from_tm(struct tm *tm)
{
char *ret = NULL;
int year;
year = tm->tm_year + 1900;
if (year < 1950 || year > 9999)
return (NULL);
if (year < 2050)
ret = utctime_string_from_tm(tm);
else
ret = gentime_string_from_tm(tm);
return (ret);
}
/*
* Parse an RFC 5280 format ASN.1 time string.
*
* mode must be:
* 0 if we expect to parse a time as specified in RFC 5280 for an X509 object.
* V_ASN1_UTCTIME if we wish to parse an RFC5280 format UTC time.
* V_ASN1_GENERALIZEDTIME if we wish to parse an RFC5280 format Generalized time.
*
* Returns:
* -1 if the string was invalid.
* V_ASN1_UTCTIME if the string validated as a UTC time string.
* V_ASN1_GENERALIZEDTIME if the string validated as a Generalized time string.
*
* Fills in *tm with the corresponding time if tm is non NULL.
*/
#define ATOI2(ar) ((ar) += 2, ((ar)[-2] - '0') * 10 + ((ar)[-1] - '0'))
int
ASN1_time_parse(const char *bytes, size_t len, struct tm *tm, int mode)
{
size_t i;
int type = 0;
struct tm ltm;
struct tm *lt;
const char *p;
if (bytes == NULL)
return (-1);
/* Constrain to valid lengths. */
if (len != UTCTIME_LENGTH && len != GENTIME_LENGTH)
return (-1);
lt = tm;
if (lt == NULL) {
memset(&ltm, 0, sizeof(ltm));
lt = &ltm;
}
/* Timezone is required and must be GMT (Zulu). */
if (bytes[len - 1] != 'Z')
return (-1);
/* Make sure everything else is digits. */
for (i = 0; i < len - 1; i++) {
if (isdigit((unsigned char)bytes[i]))
continue;
return (-1);
}
/*
* Validate and convert the time
*/
p = bytes;
switch (len) {
case GENTIME_LENGTH:
if (mode == V_ASN1_UTCTIME)
return (-1);
lt->tm_year = (ATOI2(p) * 100) - 1900; /* cc */
type = V_ASN1_GENERALIZEDTIME;
/* FALLTHROUGH */
case UTCTIME_LENGTH:
if (type == 0) {
if (mode == V_ASN1_GENERALIZEDTIME)
return (-1);
type = V_ASN1_UTCTIME;
}
lt->tm_year += ATOI2(p); /* yy */
if (type == V_ASN1_UTCTIME) {
if (lt->tm_year < 50)
lt->tm_year += 100;
}
lt->tm_mon = ATOI2(p) - 1; /* mm */
if (lt->tm_mon < 0 || lt->tm_mon > 11)
return (-1);
lt->tm_mday = ATOI2(p); /* dd */
if (lt->tm_mday < 1 || lt->tm_mday > 31)
return (-1);
lt->tm_hour = ATOI2(p); /* HH */
if (lt->tm_hour < 0 || lt->tm_hour > 23)
return (-1);
lt->tm_min = ATOI2(p); /* MM */
if (lt->tm_min < 0 || lt->tm_min > 59)
return (-1);
lt->tm_sec = ATOI2(p); /* SS */
/* Leap second 60 is not accepted. Reconsider later? */
if (lt->tm_sec < 0 || lt->tm_sec > 59)
return (-1);
break;
default:
return (-1);
}
return (type);
}
/*
* ASN1_TIME generic functions.
*/
static int
ASN1_TIME_set_string_internal(ASN1_TIME *s, const char *str, int mode)
{
int type;
char *tmp;
if ((type = ASN1_time_parse(str, strlen(str), NULL, mode)) == -1)
return (0);
if (mode != 0 && mode != type)
return (0);
if (s == NULL)
return (1);
if ((tmp = strdup(str)) == NULL)
return (0);
free(s->data);
s->data = tmp;
s->length = strlen(tmp);
s->type = type;
return (1);
}
static ASN1_TIME *
ASN1_TIME_adj_internal(ASN1_TIME *s, time_t t, int offset_day, long offset_sec,
int mode)
{
int allocated = 0;
struct tm tm;
size_t len;
char * p;
if (gmtime_r(&t, &tm) == NULL)
return (NULL);
if (offset_day || offset_sec) {
if (!OPENSSL_gmtime_adj(&tm, offset_day, offset_sec))
return (NULL);
}
switch (mode) {
case V_ASN1_UTCTIME:
p = utctime_string_from_tm(&tm);
break;
case V_ASN1_GENERALIZEDTIME:
p = gentime_string_from_tm(&tm);
break;
case RFC5280:
p = rfc5280_string_from_tm(&tm);
break;
default:
return (NULL);
}
if (p == NULL) {
ASN1error(ASN1_R_ILLEGAL_TIME_VALUE);
return (NULL);
}
if (s == NULL) {
if ((s = ASN1_TIME_new()) == NULL)
return (NULL);
allocated = 1;
}
len = strlen(p);
switch (len) {
case GENTIME_LENGTH:
s->type = V_ASN1_GENERALIZEDTIME;
break;
case UTCTIME_LENGTH:
s->type = V_ASN1_UTCTIME;
break;
default:
if (allocated)
ASN1_TIME_free(s);
free(p);
return (NULL);
}
free(s->data);
s->data = p;
s->length = len;
return (s);
}
ASN1_TIME *
ASN1_TIME_set(ASN1_TIME *s, time_t t)
{
return (ASN1_TIME_adj(s, t, 0, 0));
}
ASN1_TIME *
ASN1_TIME_set_tm(ASN1_TIME *s, struct tm *tm)
{
time_t t;
if ((t = timegm(tm)) == -1)
return NULL;
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)
{
return (ASN1_TIME_adj_internal(s, t, offset_day, offset_sec, RFC5280));
}
int
ASN1_TIME_check(const ASN1_TIME *t)
{
if (t->type != V_ASN1_GENERALIZEDTIME && t->type != V_ASN1_UTCTIME)
return (0);
return (t->type == ASN1_time_parse(t->data, t->length, NULL, t->type));
}
ASN1_GENERALIZEDTIME *
ASN1_TIME_to_generalizedtime(const ASN1_TIME *t, ASN1_GENERALIZEDTIME **out)
{
ASN1_GENERALIZEDTIME *tmp = NULL;
struct tm tm;
char *str;
if (t->type != V_ASN1_GENERALIZEDTIME && t->type != V_ASN1_UTCTIME)
return (NULL);
memset(&tm, 0, sizeof(tm));
if (t->type != ASN1_time_parse(t->data, t->length, &tm, t->type))
return (NULL);
if ((str = gentime_string_from_tm(&tm)) == NULL)
return (NULL);
if (out != NULL)
tmp = *out;
if (tmp == NULL && (tmp = ASN1_GENERALIZEDTIME_new()) == NULL) {
free(str);
return (NULL);
}
if (out != NULL)
*out = tmp;
free(tmp->data);
tmp->data = str;
tmp->length = strlen(str);
return (tmp);
}
int
ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
{
return (ASN1_TIME_set_string_internal(s, str, 0));
}
/*
* ASN1_UTCTIME wrappers
*/
int
ASN1_UTCTIME_check(const ASN1_UTCTIME *d)
{
if (d->type != V_ASN1_UTCTIME)
return (0);
return (d->type == ASN1_time_parse(d->data, d->length, NULL, d->type));
}
int
ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str)
{
if (s != NULL && s->type != V_ASN1_UTCTIME)
return (0);
return (ASN1_TIME_set_string_internal(s, str, V_ASN1_UTCTIME));
}
ASN1_UTCTIME *
ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t)
{
return (ASN1_UTCTIME_adj(s, t, 0, 0));
}
ASN1_UTCTIME *
ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t, int offset_day, long offset_sec)
{
return (ASN1_TIME_adj_internal(s, t, offset_day, offset_sec,
V_ASN1_UTCTIME));
}
int
ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t2)
{
struct tm tm1, tm2;
/*
* This function has never handled failure conditions properly
* and should be deprecated. The OpenSSL version used to
* simply follow NULL pointers on failure. BoringSSL and
* OpenSSL now make it return -2 on failure.
*
* The danger is that users of this function will not
* differentiate the -2 failure case from t1 < t2.
*/
if (ASN1_time_parse(s->data, s->length, &tm1, V_ASN1_UTCTIME) == -1)
return (-2); /* XXX */
if (gmtime_r(&t2, &tm2) == NULL)
return (-2); /* XXX */
return ASN1_time_tm_cmp(&tm1, &tm2);
}
/*
* ASN1_GENERALIZEDTIME wrappers
*/
int
ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
{
if (d->type != V_ASN1_GENERALIZEDTIME)
return (0);
return (d->type == ASN1_time_parse(d->data, d->length, NULL, d->type));
}
int
ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
{
if (s != NULL && s->type != V_ASN1_GENERALIZEDTIME)
return (0);
return (ASN1_TIME_set_string_internal(s, str, V_ASN1_GENERALIZEDTIME));
}
ASN1_GENERALIZEDTIME *
ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s, time_t t)
{
return (ASN1_GENERALIZEDTIME_adj(s, t, 0, 0));
}
ASN1_GENERALIZEDTIME *
ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s, time_t t, int offset_day,
long offset_sec)
{
return (ASN1_TIME_adj_internal(s, t, offset_day, offset_sec,
V_ASN1_GENERALIZEDTIME));
}