206 lines
7.2 KiB
Groff
Executable File
206 lines
7.2 KiB
Groff
Executable File
.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
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.\" ========================================================================
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.\"
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.IX Title "X509_CMP_TIME 3"
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.TH X509_CMP_TIME 3 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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X509_cmp_time, X509_cmp_current_time, X509_cmp_timeframe,
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X509_time_adj, X509_time_adj_ex
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\&\- X509 time functions
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 7
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\& int X509_cmp_time(const ASN1_TIME *asn1_time, time_t *in_tm);
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\& int X509_cmp_current_time(const ASN1_TIME *asn1_time);
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\& int X509_cmp_timeframe(const X509_VERIFY_PARAM *vpm,
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\& const ASN1_TIME *start, const ASN1_TIME *end);
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\& ASN1_TIME *X509_time_adj(ASN1_TIME *asn1_time, long offset_sec, time_t *in_tm);
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\& ASN1_TIME *X509_time_adj_ex(ASN1_TIME *asn1_time, int offset_day, long
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\& offset_sec, time_t *in_tm);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fIX509_cmp_time()\fR compares the \s-1ASN1_TIME\s0 in \fBasn1_time\fR with the time
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in <in_tm>.
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.PP
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\&\fIX509_cmp_current_time()\fR compares the \s-1ASN1_TIME\s0 in
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\&\fBasn1_time\fR with the current time, expressed as time_t.
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.PP
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\&\fIX509_cmp_timeframe()\fR compares the given time period with the reference time
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included in the verification parameters \fBvpm\fR if they are not \s-1NULL\s0 and contain
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\&\fBX509_V_FLAG_USE_CHECK_TIME\fR; else the current time is used as reference time.
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.PP
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\&\fIX509_time_adj_ex()\fR sets the \s-1ASN1_TIME\s0 structure \fBasn1_time\fR to the time
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\&\fBoffset_day\fR and \fBoffset_sec\fR after \fBin_tm\fR.
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.PP
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\&\fIX509_time_adj()\fR sets the \s-1ASN1_TIME\s0 structure \fBasn1_time\fR to the time
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\&\fBoffset_sec\fR after \fBin_tm\fR. This method can only handle second
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offsets up to the capacity of long, so the newer \fIX509_time_adj_ex()\fR
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\&\s-1API\s0 should be preferred.
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.PP
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In both methods, if \fBasn1_time\fR is \s-1NULL\s0, a new \s-1ASN1_TIME\s0 structure
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is allocated and returned.
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.PP
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In all methods, if \fBin_tm\fR is \s-1NULL\s0, the current time, expressed as
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time_t, is used.
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.PP
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\&\fBasn1_time\fR must satisfy the \s-1ASN1_TIME\s0 format mandated by \s-1RFC\s0 5280,
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i.e., its format must be either \s-1YYMMDDHHMMSSZ\s0 or \s-1YYYYMMDDHHMMSSZ\s0.
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.SH "BUGS"
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.IX Header "BUGS"
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Unlike many standard comparison functions, \fIX509_cmp_time()\fR and
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\&\fIX509_cmp_current_time()\fR return 0 on error.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fIX509_cmp_time()\fR and \fIX509_cmp_current_time()\fR return \-1 if \fBasn1_time\fR
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is earlier than, or equal to, \fBin_tm\fR (resp. current time), and 1
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otherwise. These methods return 0 on error.
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.PP
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\&\fIX509_cmp_timeframe()\fR returns 0 if \fBvpm\fR is not \s-1NULL\s0 and the verification
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parameters do not contain \fBX509_V_FLAG_USE_CHECK_TIME\fR
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but do contain \fBX509_V_FLAG_NO_CHECK_TIME\fR. Otherwise it returns
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1 if the end time is not \s-1NULL\s0 and the reference time (which has determined as
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stated above) is past the end time, \-1 if the start time is not \s-1NULL\s0 and the
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reference time is before, else 0 to indicate that the reference time is in range
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(implying that the end time is not before the start time if both are present).
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.PP
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\&\fIX509_time_adj()\fR and \fIX509_time_adj_ex()\fR return a pointer to the updated
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\&\s-1ASN1_TIME\s0 structure, and \s-1NULL\s0 on error.
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.SH "HISTORY"
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.IX Header "HISTORY"
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\&\fIX509_cmp_timeframe()\fR was added in OpenSSL 3.0.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2017\-2018 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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