int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d)
{
static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 };
static const int max[9] = { 99, 99, 12, 31, 23, 59, 59, 12, 59 };
char *a;
int n, i, l, o;
if (d->type != V_ASN1_GENERALIZEDTIME)
return (0);
l = d->length;
a = (char *)d->data;
o = 0;
/*
* GENERALIZEDTIME is similar to UTCTIME except the year is represented
* as YYYY. This stuff treats everything as a two digit field so make
* first two fields 00 to 99
*/
if (l < 13)
goto err;
for (i = 0; i < 7; i++) {
if ((i == 6) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
i++;
if (tm)
tm->tm_sec = 0;
break;
}
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = a[o] - '0';
if (++o > l)
goto err;
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = (n * 10) + a[o] - '0';
if (++o > l)
goto err;
if ((n < min[i]) || (n > max[i]))
goto err;
if (tm) {
switch (i) {
case 0:
tm->tm_year = n * 100 - 1900;
break;
case 1:
tm->tm_year += n;
break;
case 2:
tm->tm_mon = n - 1;
break;
case 3:
tm->tm_mday = n;
break;
case 4:
tm->tm_hour = n;
break;
case 5:
tm->tm_min = n;
break;
case 6:
tm->tm_sec = n;
break;
}
}
}
/*
* Optional fractional seconds: decimal point followed by one or more
* digits.
*/
if (a[o] == '.') {
if (++o > l)
goto err;
i = o;
while ((a[o] >= '0') && (a[o] <= '9') && (o <= l))
o++;
/* Must have at least one digit after decimal point */
if (i == o)
goto err;
}
if (a[o] == 'Z')
o++;
else if ((a[o] == '+') || (a[o] == '-')) {
int offsign = a[o] == '-' ? -1 : 1, offset = 0;
o++;
if (o + 4 > l)
goto err;
for (i = 7; i < 9; i++) {
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = a[o] - '0';
o++;
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = (n * 10) + a[o] - '0';
if ((n < min[i]) || (n > max[i]))
goto err;
if (tm) {
if (i == 7)
offset = n * 3600;
else if (i == 8)
offset += n * 60;
}
o++;
}
if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
return 0;
} else if (a[o]) {
/* Missing time zone information. */
goto err;
}
return (o == l);
err:
return (0);
}
int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d)
{
static const int min[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };
static const int max[8] = { 99, 12, 31, 23, 59, 59, 12, 59 };
char *a;
int n, i, l, o;
if (d->type != V_ASN1_UTCTIME)
return (0);
l = d->length;
a = (char *)d->data;
o = 0;
if (l < 11)
goto err;
for (i = 0; i < 6; i++) {
if ((i == 5) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) {
i++;
if (tm)
tm->tm_sec = 0;
break;
}
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = a[o] - '0';
if (++o > l)
goto err;
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = (n * 10) + a[o] - '0';
if (++o > l)
goto err;
if ((n < min[i]) || (n > max[i]))
goto err;
if (tm) {
switch (i) {
case 0:
tm->tm_year = n < 50 ? n + 100 : n;
break;
case 1:
tm->tm_mon = n - 1;
break;
case 2:
tm->tm_mday = n;
break;
case 3:
tm->tm_hour = n;
break;
case 4:
tm->tm_min = n;
break;
case 5:
tm->tm_sec = n;
break;
}
}
}
if (a[o] == 'Z')
o++;
else if ((a[o] == '+') || (a[o] == '-')) {
int offsign = a[o] == '-' ? -1 : 1, offset = 0;
o++;
if (o + 4 > l)
goto err;
for (i = 6; i < 8; i++) {
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = a[o] - '0';
o++;
if ((a[o] < '0') || (a[o] > '9'))
goto err;
n = (n * 10) + a[o] - '0';
if ((n < min[i]) || (n > max[i]))
goto err;
if (tm) {
if (i == 6)
offset = n * 3600;
else if (i == 7)
offset += n * 60;
}
o++;
}
if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign))
return 0;
}
return o == l;
err:
return 0;
}
ASN1_UTCTIME *ASN1_UTCTIME_adj (ASN1_UTCTIME * s, time_t t, int offset_day, long offset_sec)
{
char *p;
struct tm *ts;
struct tm data;
size_t len = 20;
int free_s = 0;
if (s == NULL)
{
free_s = 1;
s = M_ASN1_UTCTIME_new ();
}
if (s == NULL)
goto err;
ts = OPENSSL_gmtime (&t, &data);
if (ts == NULL)
goto err;
if (offset_day || offset_sec)
{
if (!OPENSSL_gmtime_adj (ts, offset_day, offset_sec))
goto err;
}
if ((ts->tm_year < 50) || (ts->tm_year >= 150))
goto err;
p = (char *) s->data;
if ((p == NULL) || ((size_t) s->length < len))
{
p = OPENSSL_malloc (len);
if (p == NULL)
{
ASN1err (ASN1_F_ASN1_UTCTIME_ADJ, ERR_R_MALLOC_FAILURE);
goto err;
}
if (s->data != NULL)
OPENSSL_free (s->data);
s->data = (unsigned char *) p;
}
BIO_snprintf (p, len, "%02d%02d%02d%02d%02d%02dZ", ts->tm_year % 100,
ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min, ts->tm_sec);
s->length = strlen (p);
s->type = V_ASN1_UTCTIME;
#ifdef CHARSET_EBCDIC_not
ebcdic2ascii (s->data, s->data, s->length);
#endif
return (s);
err:
if (free_s && s)
M_ASN1_UTCTIME_free (s);
return NULL;
}
