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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 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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