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>.