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=head1 NAME

X509_cmp_time - X509 time functions

=head1 SYNOPSIS

 X509_cmp_time(const ASN1_TIME *asn1_time, time_t *cmp_time);

=head1 DESCRIPTION

X509_cmp_time() compares the ASN1_TIME in B<asn1_time> with the time in
<cmp_time>.

B<asn1_time> must satisfy the ASN1_TIME format mandated by RFC 5280, i.e.,
its format must be either YYMMDDHHMMSSZ or YYYYMMDDHHMMSSZ.

If B<cmp_time> is NULL the current time is used.

=head1 BUGS

Unlike many standard comparison functions, X509_cmp_time returns 0 on error.

=head1 RETURN VALUES

X509_cmp_time() returns -1 if B<asn1_time> is earlier than, or equal to,
B<cmp_time>, and 1 otherwise. It returns 0 on error.

=head1 COPYRIGHT

Copyright 2017-2019 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
L<https://www.openssl.org/source/license.html>.

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