.\" $OpenBSD: X509_cmp_time.3,v 1.11 2021/11/12 14:34:57 schwarze Exp $ .\" full merge up to: OpenSSL 83cf7abf May 29 13:07:08 2018 +0100 .\" .\" This file is a derived work. .\" The changes are covered by the following Copyright and license: .\" .\" Copyright (c) 2017, 2021 Ingo Schwarze .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. .\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS. 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IN NO EVENT SHALL THE OpenSSL PROJECT OR .\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, .\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; .\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, .\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED .\" OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd $Mdocdate: November 12 2021 $ .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 , .Nm X509_gmtime_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 *out_time" .Fa "int offset_day" .Fa "long offset_sec" .Fa "time_t *in_time" .Fc .Ft ASN1_TIME * .Fo X509_time_adj .Fa "ASN1_TIME *out_time" .Fa "long offset_sec" .Fa "time_t *in_time" .Fc .Ft ASN1_TIME * .Fo X509_gmtime_adj .Fa "ASN1_TIME *out_time" .Fa "long offset_sec" .Fc .Sh DESCRIPTION .Fn X509_cmp_time parses .Fa asn1_time with .Xr ASN1_time_parse 3 and compares it to .Fa cmp_time , or to the current time if .Fa cmp_time is .Dv NULL . .Fn X509_cmp_current_time compares it to the current time. .Pp .Fn X509_time_adj_ex sets .Fa out_time to a time .Fa offset_day and .Fa offset_sec later than .Fa in_time . The values of .Fa offset_day and .Fa offset_sec can be negative to set a time before .Fa in_time . The .Fa offset_sec value can also exceed the number of seconds in a day. If .Fa in_time is .Dv NULL , the current time is used instead. If .Fa out_time is .Dv NULL , a new .Vt ASN1_TIME structure is allocated and returned. .Pp .Fn X509_time_adj does the same with a 0 day offset. .Pp .Fn X509_gmtime_adj does the same using the current time instead of .Fa in_time , that is, it sets .Fa out_time to a time .Fa offset_sec seconds later than the current time. .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 , .Fn X509_time_adj , and .Fn X509_gmtime_adj return a pointer to the updated or newly allocated .Vt ASN1_TIME structure or .Dv NULL on error. .Sh SEE ALSO .Xr ASN1_TIME_new 3 , .Xr ASN1_time_parse 3 , .Xr ASN1_TIME_set 3 , .Xr time 3 .Sh HISTORY .Fn X509_cmp_current_time and .Fn X509_gmtime_adj first appeared in SSLeay 0.6.0 and have 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 .