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✏️ Editing: X509_time_adj.3

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.\" ========================================================================
.\"
.IX Title "X509_CMP_TIME 3"
.TH X509_CMP_TIME 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
X509_cmp_time, X509_cmp_current_time, X509_time_adj, X509_time_adj_ex \&\- X509 time functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 5
\& 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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBX509_cmp_time()\fR compares the \s-1ASN1_TIME\s0 in \fBasn1_time\fR with the time
in <cmp_time>. \fBX509_cmp_current_time()\fR compares the \s-1ASN1_TIME\s0 in
\&\fBasn1_time\fR with the current time, expressed as time_t. \fBasn1_time\fR
must satisfy the \s-1ASN1_TIME\s0 format mandated by \s-1RFC 5280,\s0 i.e., its
format must be either \s-1YYMMDDHHMMSSZ\s0 or \s-1YYYYMMDDHHMMSSZ.\s0
.PP
\&\fBX509_time_adj_ex()\fR sets the \s-1ASN1_TIME\s0 structure \fBasn1_time\fR to the time
\&\fBoffset_day\fR and \fBoffset_sec\fR after \fBin_tm\fR.
.PP
\&\fBX509_time_adj()\fR sets the \s-1ASN1_TIME\s0 structure \fBasn1_time\fR to the time
\&\fBoffset_sec\fR after \fBin_tm\fR. This method can only handle second
offsets up to the capacity of long, so the newer \fBX509_time_adj_ex()\fR
\&\s-1API\s0 should be preferred.
.PP
In both methods, if \fBasn1_time\fR is \s-1NULL,\s0 a new \s-1ASN1_TIME\s0 structure
is allocated and returned.
.PP
In all methods, if \fBin_tm\fR is \s-1NULL,\s0 the current time, expressed as
time_t, is used.
.SH "BUGS"
.IX Header "BUGS"
Unlike many standard comparison functions, \fBX509_cmp_time()\fR and
\&\fBX509_cmp_current_time()\fR return 0 on error.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBX509_cmp_time()\fR and \fBX509_cmp_current_time()\fR return \-1 if \fBasn1_time\fR
is earlier than, or equal to, \fBcmp_time\fR (resp. current time), and 1
otherwise. These methods return 0 on error.
.PP
\&\fBX509_time_adj()\fR and \fBX509_time_adj_ex()\fR return a pointer to the updated
\&\s-1ASN1_TIME\s0 structure, and \s-1NULL\s0 on error.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

MR SKB