NAME

       X509_cmp_time, X509_cmp_current_time, X509_time_adj, X509_time_adj_ex - X509 time
       functions

SYNOPSIS

        int X509_cmp_time(const ASN1_TIME *asn1_time, time_t *in_tm);
        int X509_cmp_current_time(const ASN1_TIME *asn1_time);
        ASN1_TIME *X509_time_adj(ASN1_TIME *asn1_time, long offset_sec, time_t *in_tm);
        ASN1_TIME *X509_time_adj_ex(ASN1_TIME *asn1_time, int offset_day, long
                                    offset_sec, time_t *in_tm);

DESCRIPTION

       X509_cmp_time() compares the ASN1_TIME in asn1_time with the time in <cmp_time>.
       X509_cmp_current_time() compares the ASN1_TIME in asn1_time with the current time,
       expressed as time_t. asn1_time must satisfy the ASN1_TIME format mandated by RFC 5280,
       i.e., its format must be either YYMMDDHHMMSSZ or YYYYMMDDHHMMSSZ.

       X509_time_adj_ex() sets the ASN1_TIME structure asn1_time to the time offset_day and
       offset_sec after in_tm.

       X509_time_adj() sets the ASN1_TIME structure asn1_time to the time offset_sec after in_tm.
       This method can only handle second offsets up to the capacity of long, so the newer
       X509_time_adj_ex() API should be preferred.

       In both methods, if asn1_time is NULL, a new ASN1_TIME structure is allocated and
       returned.

       In all methods, if in_tm is NULL, the current time, expressed as time_t, is used.

BUGS

       Unlike many standard comparison functions, X509_cmp_time() and X509_cmp_current_time()
       return 0 on error.

RETURN VALUES

       X509_cmp_time() and X509_cmp_current_time() return -1 if asn1_time is earlier than, or
       equal to, cmp_time (resp. current time), and 1 otherwise. These methods return 0 on error.

       X509_time_adj() and X509_time_adj_ex() return a pointer to the updated ASN1_TIME
       structure, and NULL on error.

COPYRIGHT

       Copyright 2017-2018 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>.