A local copy of OpenSSL from GitHub
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/*
* Copyright 1995-2016 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
*/
/*
* GENERALIZEDTIME implementation. Based on UTCTIME
*/
#include <stdio.h>
#include <time.h>
#include "internal/cryptlib.h"
#include <openssl/asn1.h>
#include "asn1_locl.h"
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_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d)
{
return asn1_generalizedtime_to_tm(NULL, d);
}
int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str)
{
ASN1_GENERALIZEDTIME t;
t.type = V_ASN1_GENERALIZEDTIME;
t.length = strlen(str);
t.data = (unsigned char *)str;
if (ASN1_GENERALIZEDTIME_check(&t)) {
if (s != NULL) {
if (!ASN1_STRING_set((ASN1_STRING *)s,
(unsigned char *)str, t.length))
return 0;
s->type = V_ASN1_GENERALIZEDTIME;
}
return (1);
} else
return (0);
}
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)
{
char *p;
struct tm *ts;
struct tm data;
size_t len = 20;
if (s == NULL)
s = ASN1_GENERALIZEDTIME_new();
if (s == NULL)
return (NULL);
ts = OPENSSL_gmtime(&t, &data);
if (ts == NULL)
return (NULL);
if (offset_day || offset_sec) {
if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
return NULL;
}
p = (char *)s->data;
if ((p == NULL) || ((size_t)s->length < len)) {
p = OPENSSL_malloc(len);
if (p == NULL) {
ASN1err(ASN1_F_ASN1_GENERALIZEDTIME_ADJ, ERR_R_MALLOC_FAILURE);
return (NULL);
}
OPENSSL_free(s->data);
s->data = (unsigned char *)p;
}
BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900,
ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min,
ts->tm_sec);
s->length = strlen(p);
s->type = V_ASN1_GENERALIZEDTIME;
#ifdef CHARSET_EBCDIC_not
ebcdic2ascii(s->data, s->data, s->length);
#endif
return (s);
}
const char *_asn1_mon[12] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
int ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
{
char *v;
int gmt = 0;
int i;
int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
char *f = NULL;
int f_len = 0;
i = tm->length;
v = (char *)tm->data;
if (i < 12)
goto err;
if (v[i - 1] == 'Z')
gmt = 1;
for (i = 0; i < 12; i++)
if ((v[i] > '9') || (v[i] < '0'))
goto err;
y = (v[0] - '0') * 1000 + (v[1] - '0') * 100
+ (v[2] - '0') * 10 + (v[3] - '0');
M = (v[4] - '0') * 10 + (v[5] - '0');
if ((M > 12) || (M < 1))
goto err;
d = (v[6] - '0') * 10 + (v[7] - '0');
h = (v[8] - '0') * 10 + (v[9] - '0');
m = (v[10] - '0') * 10 + (v[11] - '0');
if (tm->length >= 14 &&
(v[12] >= '0') && (v[12] <= '9') &&
(v[13] >= '0') && (v[13] <= '9')) {
s = (v[12] - '0') * 10 + (v[13] - '0');
/* Check for fractions of seconds. */
if (tm->length >= 15 && v[14] == '.') {
int l = tm->length;
f = &v[14]; /* The decimal point. */
f_len = 1;
while (14 + f_len < l && f[f_len] >= '0' && f[f_len] <= '9')
++f_len;
}
}
if (BIO_printf(bp, "%s %2d %02d:%02d:%02d%.*s %d%s",
_asn1_mon[M - 1], d, h, m, s, f_len, f, y,
(gmt) ? " GMT" : "") <= 0)
return (0);
else
return (1);
err:
BIO_write(bp, "Bad time value", 14);
return (0);
}