Function md_asn1_time_get

modules/md/md_crypt.c:212–266

Get the apr time (micro seconds, since 1970) from an ASN1 time, as stored in X509 * certificates. OpenSSL now has a utility function, but other *SSL derivatives have * not caught up yet or chose to ignore. An alternative is implemented, we prefer * however the *SSL to maintain such things. */

 * however the *SSL to maintain such things.
 */
static apr_time_t md_asn1_time_get(const ASN1_TIME* time)
{
#if OPENSSL_VERSION_NUMBER < 0x10002000L || (defined(LIBRESSL_VERSION_NUMBER) && \
                                             LIBRESSL_VERSION_NUMBER < 0x3060000fL)
    /* courtesy: https://stackoverflow.com/questions/10975542/asn1-time-to-time-t-conversion#11263731
     * all bugs are mine */
    apr_time_exp_t t;
    apr_time_t ts;
    const char* str = (const char*) time->data;
    apr_size_t i = 0;

    if ((time->length < 12) || (
        (time->type == V_ASN1_GENERALIZEDTIME) && time->length < 16))
      return 0;

    memset(&t, 0, sizeof(t));

    if (time->type == V_ASN1_UTCTIME) {/* two digit year */
        t.tm_year = (str[i++] - '0') * 10;
        t.tm_year += (str[i++] - '0');
        if (t.tm_year < 70)
            t.tm_year += 100;
    } 
    else if (time->type == V_ASN1_GENERALIZEDTIME) {/* four digit year */
        t.tm_year = (str[i++] - '0') * 1000;
        t.tm_year+= (str[i++] - '0') * 100;
        t.tm_year+= (str[i++] - '0') * 10;
        t.tm_year+= (str[i++] - '0');
        t.tm_year -= 1900;
    }
    t.tm_mon  = (str[i++] - '0') * 10;
    t.tm_mon += (str[i++] - '0') - 1; /* -1 since January is 0 not 1. */
    t.tm_mday = (str[i++] - '0') * 10;
    t.tm_mday+= (str[i++] - '0');
    t.tm_hour = (str[i++] - '0') * 10;
    t.tm_hour+= (str[i++] - '0');
    t.tm_min  = (str[i++] - '0') * 10;
    t.tm_min += (str[i++] - '0');
    t.tm_sec  = (str[i++] - '0') * 10;
    t.tm_sec += (str[i++] - '0');
    
    if (APR_SUCCESS == apr_time_exp_gmt_get(&ts, &t)) {
        return ts;
    }
    return 0;
#else 
    int secs, days;
    apr_time_t ts = apr_time_now();
    
    if (ASN1_TIME_diff(&days, &secs, NULL, time)) {
        ts += apr_time_from_sec((days * MD_SECS_PER_DAY) + secs); 
    }
    return ts;
#endif
}

apr_time_t md_asn1_generalized_time_get(void *asn1_gtime)
{