.\"	$OpenBSD: X509_cmp_time.3,v 1.8 2018/03/27 17:35:50 schwarze Exp $
.\"	OpenSSL X509_cmp_time.pod 24053693 Mar 28 14:27:37 2017 +0200
.\"
.\" This file was written by Emilia Kasper <emilia@openssl.org>
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.Dd $Mdocdate: March 27 2018 $
.Dt X509_CMP_TIME 3
.Os
.Sh NAME
.Nm X509_cmp_time ,
.Nm X509_cmp_current_time ,
.Nm X509_time_adj_ex ,
.Nm X509_time_adj
.Nd ASN.1 Time utilities
.Sh SYNOPSIS
.In openssl/x509.h
.Ft int
.Fo X509_cmp_time
.Fa "const ASN1_TIME *asn1_time"
.Fa "time_t *cmp_time"
.Fc
.Ft int
.Fo X509_cmp_current_time
.Fa "const ASN1_TIME *asn1_time"
.Fc
.Ft ASN1_TIME *
.Fo X509_time_adj_ex
.Fa "ASN1_TIME *asn1_time"
.Fa "int offset_day"
.Fa "long offset_sec"
.Fa "time_t *in_tm"
.Fc
.Ft ASN1_TIME *
.Fo X509_time_adj
.Fa "ASN1_TIME *asn1_time"
.Fa "long offset_sec"
.Fa "time_t *in_tm"
.Fc
.Sh DESCRIPTION
.Fn X509_cmp_time
parses
.Fa asn1_time
with
.Xr ASN1_time_parse 3
and compares it to
.Fa cmp_time .
.Fn X509_cmp_current_time
compares it to the current time.
.Pp
.Fn X509_time_adj_ex
sets
.Fa asn1_time
to a time
.Fa offset_day
and
.Fa offset_sec
later than
.Fa in_tm .
.Fn X509_time_adj
does the same with a 0 day offset.
If
.Fa asn1_time
is
.Dv NULL ,
a new
.Vt ASN1_TIME
structure is allocated and returned.
.Pp
In all functions, if
.Fa in_tm
is
.Dv NULL ,
the current time is used.
.Sh RETURN VALUES
.Fn X509_cmp_time
and
.Fn X509_cmp_current_time
return -1 if
.Fa asn1_time
is earlier than or equal to
.Fa cmp_time ,
1 if it is later, or 0 on error.
.Pp
.Fn X509_time_adj_ex
and
.Fn X509_time_adj
return a pointer to the updated
.Vt ASN1_TIME
structure or
.Dv NULL
on error.
.Sh SEE ALSO
.Xr ASN1_time_parse 3 ,
.Xr time 3
.Sh HISTORY
.Fn X509_cmp_current_time
first appeared in SSLeay 0.6.0 and has been available since
.Ox 2.4 .
.Pp
.Fn X509_cmp_time
and
.Fn X509_time_adj
first appeared in OpenSSL 0.9.6 and have been available since
.Ox 2.9 .
.Pp
.Fn X509_time_adj_ex
first appeared in OpenSSL 1.0.0 and has been available since
.Ox 4.9 .