=head1 NAME
-X509_cmp_time, X509_cmp_current_time, X509_time_adj, X509_time_adj_ex
+X509_cmp_time, X509_cmp_current_time, X509_cmp_timeframe,
+X509_time_adj, X509_time_adj_ex
- X509 time functions
=head1 SYNOPSIS
int X509_cmp_time(const ASN1_TIME *asn1_time, time_t *in_tm);
int X509_cmp_current_time(const ASN1_TIME *asn1_time);
+ int X509_cmp_timeframe(const X509_VERIFY_PARAM *vpm,
+ const ASN1_TIME *start, const ASN1_TIME *end);
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);
=head1 DESCRIPTION
X509_cmp_time() compares the ASN1_TIME in B<asn1_time> with the time
-in <cmp_time>. X509_cmp_current_time() compares the ASN1_TIME in
-B<asn1_time> with the current time, expressed as time_t. B<asn1_time>
-must satisfy the ASN1_TIME format mandated by RFC 5280, i.e., its
-format must be either YYMMDDHHMMSSZ or YYYYMMDDHHMMSSZ.
+in <in_tm>.
+
+X509_cmp_current_time() compares the ASN1_TIME in
+B<asn1_time> with the current time, expressed as time_t.
+
+X509_cmp_timeframe() compares the given time period with the reference time
+included in the verification parameters B<vpm> if they are not NULL and contain
+B<X509_V_FLAG_USE_CHECK_TIME>; else the current time is used as reference time.
X509_time_adj_ex() sets the ASN1_TIME structure B<asn1_time> to the time
B<offset_day> and B<offset_sec> after B<in_tm>.
In all methods, if B<in_tm> is NULL, the current time, expressed as
time_t, is used.
+B<asn1_time> must satisfy the ASN1_TIME format mandated by RFC 5280,
+i.e., its format must be either YYMMDDHHMMSSZ or YYYYMMDDHHMMSSZ.
+
=head1 BUGS
Unlike many standard comparison functions, X509_cmp_time() and
=head1 RETURN VALUES
X509_cmp_time() and X509_cmp_current_time() return -1 if B<asn1_time>
-is earlier than, or equal to, B<cmp_time> (resp. current time), and 1
+is earlier than, or equal to, B<in_tm> (resp. current time), and 1
otherwise. These methods return 0 on error.
+X509_cmp_timeframe() returns 0 if B<vpm> is not NULL and the verification
+parameters do not contain B<X509_V_FLAG_USE_CHECK_TIME>
+but do contain B<X509_V_FLAG_NO_CHECK_TIME>. Otherwise it returns
+1 if the end time is not NULL and the reference time (which has determined as
+stated above) is past the end time, -1 if the start time is not NULL and the
+reference time is before, else 0 to indicate that the reference time is in range
+(implying that the end time is not before the start time if both are present).
+
X509_time_adj() and X509_time_adj_ex() return a pointer to the updated
ASN1_TIME structure, and NULL on error.
+=head1 HISTORY
+
+X509_cmp_timeframe() was added in OpenSSL 3.0.
+
=head1 COPYRIGHT
Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.