1=pod 2 3=head1 NAME 4 5X509_cmp_time, X509_cmp_current_time, X509_cmp_timeframe, 6X509_time_adj, X509_time_adj_ex, X509_gmtime_adj 7- X509 time functions 8 9=head1 SYNOPSIS 10 11 int X509_cmp_time(const ASN1_TIME *asn1_time, time_t *in_tm); 12 int X509_cmp_current_time(const ASN1_TIME *asn1_time); 13 int X509_cmp_timeframe(const X509_VERIFY_PARAM *vpm, 14 const ASN1_TIME *start, const ASN1_TIME *end); 15 ASN1_TIME *X509_time_adj(ASN1_TIME *asn1_time, long offset_sec, time_t *in_tm); 16 ASN1_TIME *X509_time_adj_ex(ASN1_TIME *asn1_time, int offset_day, long 17 offset_sec, time_t *in_tm); 18 ASN1_TIME *X509_gmtime_adj(ASN1_TIME *asn1_time, long offset_sec); 19 20=head1 DESCRIPTION 21 22X509_cmp_time() compares the ASN1_TIME in I<asn1_time> with the time 23in <in_tm>. 24 25X509_cmp_current_time() compares the ASN1_TIME in 26I<asn1_time> with the current time, expressed as time_t. 27 28X509_cmp_timeframe() compares the given time period with the reference time 29included in the verification parameters I<vpm> if they are not NULL and contain 30B<X509_V_FLAG_USE_CHECK_TIME>; else the current time is used as reference time. 31 32X509_time_adj_ex() sets the ASN1_TIME structure I<asn1_time> to the time 33I<offset_day> and I<offset_sec> after I<in_tm>. 34 35X509_time_adj() sets the ASN1_TIME structure I<asn1_time> to the time 36I<offset_sec> after I<in_tm>. This method can only handle second 37offsets up to the capacity of long, so the newer X509_time_adj_ex() 38API should be preferred. 39 40In both methods, if I<asn1_time> is NULL, a new ASN1_TIME structure 41is allocated and returned. 42 43In all methods, if I<in_tm> is NULL, the current time, expressed as 44time_t, is used. 45 46I<asn1_time> must satisfy the ASN1_TIME format mandated by RFC 5280, 47i.e., its format must be either YYMMDDHHMMSSZ or YYYYMMDDHHMMSSZ. 48 49X509_gmtime_adj() sets the ASN1_TIME structure I<asn1_time> to the time 50I<offset_sec> after the current time. It is equivalent to calling 51X509_time_adj() with the last parameter as NULL. 52 53=head1 BUGS 54 55Unlike many standard comparison functions, X509_cmp_time() and 56X509_cmp_current_time() return 0 on error. 57 58=head1 RETURN VALUES 59 60X509_cmp_time() and X509_cmp_current_time() return -1 if I<asn1_time> 61is earlier than, or equal to, I<in_tm> (resp. current time), and 1 62otherwise. These methods return 0 on error. 63 64X509_cmp_timeframe() returns 0 if I<vpm> is not NULL and the verification 65parameters do not contain B<X509_V_FLAG_USE_CHECK_TIME> 66but do contain B<X509_V_FLAG_NO_CHECK_TIME>. Otherwise it returns 671 if the end time is not NULL and the reference time (which has determined as 68stated above) is past the end time, -1 if the start time is not NULL and the 69reference time is before, else 0 to indicate that the reference time is in range 70(implying that the end time is not before the start time if both are present). 71 72X509_time_adj(), X509_time_adj_ex() and X509_gmtime_adj() return a pointer to 73the updated ASN1_TIME structure, and NULL on error. 74 75=head1 HISTORY 76 77X509_cmp_timeframe() was added in OpenSSL 3.0. 78 79=head1 COPYRIGHT 80 81Copyright 2017-2022 The OpenSSL Project Authors. All Rights Reserved. 82 83Licensed under the Apache License 2.0 (the "License"). You may not use 84this file except in compliance with the License. You can obtain a copy 85in the file LICENSE in the source distribution or at 86L<https://www.openssl.org/source/license.html>. 87 88=cut 89