1X509_CMP_TIME(3ossl)                OpenSSL               X509_CMP_TIME(3ossl)
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NAME

6       X509_cmp_time, X509_cmp_current_time, X509_cmp_timeframe,
7       X509_time_adj, X509_time_adj_ex, X509_gmtime_adj - X509 time functions
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SYNOPSIS

10        int X509_cmp_time(const ASN1_TIME *asn1_time, time_t *in_tm);
11        int X509_cmp_current_time(const ASN1_TIME *asn1_time);
12        int X509_cmp_timeframe(const X509_VERIFY_PARAM *vpm,
13                               const ASN1_TIME *start, const ASN1_TIME *end);
14        ASN1_TIME *X509_time_adj(ASN1_TIME *asn1_time, long offset_sec, time_t *in_tm);
15        ASN1_TIME *X509_time_adj_ex(ASN1_TIME *asn1_time, int offset_day, long
16                                    offset_sec, time_t *in_tm);
17        ASN1_TIME *X509_gmtime_adj(ASN1_TIME *asn1_time, long offset_sec);
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DESCRIPTION

20       X509_cmp_time() compares the ASN1_TIME in asn1_time with the time in
21       <in_tm>.
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23       X509_cmp_current_time() compares the ASN1_TIME in asn1_time with the
24       current time, expressed as time_t.
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26       X509_cmp_timeframe() compares the given time period with the reference
27       time included in the verification parameters vpm if they are not NULL
28       and contain X509_V_FLAG_USE_CHECK_TIME; else the current time is used
29       as reference time.
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31       X509_time_adj_ex() sets the ASN1_TIME structure asn1_time to the time
32       offset_day and offset_sec after in_tm.
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34       X509_time_adj() sets the ASN1_TIME structure asn1_time to the time
35       offset_sec after in_tm. This method can only handle second offsets up
36       to the capacity of long, so the newer X509_time_adj_ex() API should be
37       preferred.
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39       In both methods, if asn1_time is NULL, a new ASN1_TIME structure is
40       allocated and returned.
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42       In all methods, if in_tm is NULL, the current time, expressed as
43       time_t, is used.
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45       asn1_time must satisfy the ASN1_TIME format mandated by RFC 5280, i.e.,
46       its format must be either YYMMDDHHMMSSZ or YYYYMMDDHHMMSSZ.
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48       X509_gmtime_adj() sets the ASN1_TIME structure asn1_time to the time
49       offset_sec after the current time. It is equivalent to calling
50       X509_time_adj() with the last parameter as NULL.
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BUGS

53       Unlike many standard comparison functions, X509_cmp_time() and
54       X509_cmp_current_time() return 0 on error.
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RETURN VALUES

57       X509_cmp_time() and X509_cmp_current_time() return -1 if asn1_time is
58       earlier than, or equal to, in_tm (resp. current time), and 1 otherwise.
59       These methods return 0 on error.
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61       X509_cmp_timeframe() returns 0 if vpm is not NULL and the verification
62       parameters do not contain X509_V_FLAG_USE_CHECK_TIME but do contain
63       X509_V_FLAG_NO_CHECK_TIME. Otherwise it returns 1 if the end time is
64       not NULL and the reference time (which has determined as stated above)
65       is past the end time, -1 if the start time is not NULL and the
66       reference time is before, else 0 to indicate that the reference time is
67       in range (implying that the end time is not before the start time if
68       both are present).
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70       X509_time_adj(), X509_time_adj_ex() and X509_gmtime_adj() return a
71       pointer to the updated ASN1_TIME structure, and NULL on error.
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HISTORY

74       X509_cmp_timeframe() was added in OpenSSL 3.0.
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77       Copyright 2017-2022 The OpenSSL Project Authors. All Rights Reserved.
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79       Licensed under the Apache License 2.0 (the "License").  You may not use
80       this file except in compliance with the License.  You can obtain a copy
81       in the file LICENSE in the source distribution or at
82       <https://www.openssl.org/source/license.html>.
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863.1.1                             2023-08-31              X509_CMP_TIME(3ossl)
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