diff options
Diffstat (limited to 'src/libstrongswan/asn1/asn1.c')
| -rw-r--r-- | src/libstrongswan/asn1/asn1.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/src/libstrongswan/asn1/asn1.c b/src/libstrongswan/asn1/asn1.c index 1359dcd2d..8b9762777 100644 --- a/src/libstrongswan/asn1/asn1.c +++ b/src/libstrongswan/asn1/asn1.c @@ -14,7 +14,7 @@ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * - * $Id: asn1.c 4942 2009-03-13 20:22:24Z andreas $ + * $Id: asn1.c 5041 2009-03-27 08:58:48Z andreas $ */ #include <stdio.h> @@ -264,13 +264,15 @@ u_int asn1_length(chunk_t *blob) return len; } +#define TIME_MAX 0x7fffffff + /** * Converts ASN.1 UTCTIME or GENERALIZEDTIME into calender time */ time_t asn1_to_time(const chunk_t *utctime, asn1_t type) { struct tm t; - time_t tz_offset; + time_t tc, tz_offset; u_char *eot = NULL; if ((eot = memchr(utctime->ptr, 'Z', utctime->len)) != NULL) @@ -296,12 +298,13 @@ time_t asn1_to_time(const chunk_t *utctime, asn1_t type) return 0; /* error in time format */ } + /* parse ASN.1 time string */ { - const char* format = (type == ASN1_UTCTIME)? "%2d%2d%2d%2d%2d": - "%4d%2d%2d%2d%2d"; + const char* format = (type == ASN1_UTCTIME)? "%2d%2d%2d%2d%2d": + "%4d%2d%2d%2d%2d"; - sscanf(utctime->ptr, format, &t.tm_year, &t.tm_mon, &t.tm_mday, - &t.tm_hour, &t.tm_min); + sscanf(utctime->ptr, format, &t.tm_year, &t.tm_mon, &t.tm_mday, + &t.tm_hour, &t.tm_min); } /* is there a seconds field? */ @@ -334,9 +337,11 @@ time_t asn1_to_time(const chunk_t *utctime, asn1_t type) /* set daylight saving time to off */ t.tm_isdst = 0; - /* compensate timezone */ - - return mktime(&t) - timezone - tz_offset; + /* convert to time_t */ + tc = mktime(&t); + + /* if no conversion overflow occurred, compensate timezone */ + return (tc == -1) ? TIME_MAX : (tc - timezone - tz_offset); } /** |