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X509_cmp_time(3)                    OpenSSL                   X509_cmp_time(3)

       X509_cmp_time, X509_cmp_current_time, X509_time_adj, X509_time_adj_ex -
       X509 time functions

       libcrypto, -lcrypto

        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);

       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

       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

       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.

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

       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 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

1.1.1                             2018-09-17                  X509_cmp_time(3)