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.\" ========================================================================
.\"
.IX Title "X509_GET0_NOTBEFORE 3ossl"
.TH X509_GET0_NOTBEFORE 3ossl "2026-01-27" "3.5.5" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
X509_get0_notBefore, X509_getm_notBefore, X509_get0_notAfter,
X509_getm_notAfter, X509_set1_notBefore, X509_set1_notAfter,
X509_ACERT_get0_notBefore, X509_ACERT_get0_notAfter,
X509_ACERT_set1_notBefore, X509_ACERT_set1_notAfter,
X509_CRL_get0_lastUpdate, X509_CRL_get0_nextUpdate, X509_CRL_set1_lastUpdate,
X509_CRL_set1_nextUpdate \- get or set certificate or CRL dates
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509.h>
\&
\& const ASN1_TIME *X509_get0_notBefore(const X509 *x);
\& const ASN1_TIME *X509_get0_notAfter(const X509 *x);
\&
\& ASN1_TIME *X509_getm_notBefore(const X509 *x);
\& ASN1_TIME *X509_getm_notAfter(const X509 *x);
\&
\& int X509_set1_notBefore(X509 *x, const ASN1_TIME *tm);
\& int X509_set1_notAfter(X509 *x, const ASN1_TIME *tm);
\&
\& const ASN1_GENERALIZEDTIME *X509_ACERT_get0_notBefore(const X509 *x);
\& const ASN1_GENERALIZEDTIME *X509_ACERT_get0_notAfter(const X509 *x);
\&
\& int X509_ACERT_set1_notBefore(X509_ACERT *x, const ASN1_GENERALIZEDTIME *tm);
\& int X509_ACERT_set1_notAfter(X509_ACERT *x, const ASN1_GENERALIZEDTIME *tm);
\&
\& const ASN1_TIME *X509_CRL_get0_lastUpdate(const X509_CRL *crl);
\& const ASN1_TIME *X509_CRL_get0_nextUpdate(const X509_CRL *crl);
\&
\& int X509_CRL_set1_lastUpdate(X509_CRL *x, const ASN1_TIME *tm);
\& int X509_CRL_set1_nextUpdate(X509_CRL *x, const ASN1_TIME *tm);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBX509_get0_notBefore()\fR and \fBX509_get0_notAfter()\fR return the \fBnotBefore\fR
and \fBnotAfter\fR fields of certificate \fIx\fR respectively. The value
returned is an internal pointer which must not be freed up after
the call. \fIx\fR \fB\s-1MUST NOT\s0\fR be \s-1NULL.\s0
.PP
\&\fBX509_getm_notBefore()\fR and \fBX509_getm_notAfter()\fR are similar to
\&\fBX509_get0_notBefore()\fR and \fBX509_get0_notAfter()\fR except they return
non-constant mutable references to the associated date field of
the certificate.
.PP
\&\fBX509_set1_notBefore()\fR and \fBX509_set1_notAfter()\fR set the \fBnotBefore\fR
and \fBnotAfter\fR fields of \fIx\fR to \fItm\fR. Ownership of the passed
parameter \fItm\fR is not transferred by these functions so it must
be freed up after the call.
.PP
\&\fBX509_ACERT_get0_notBefore()\fR and \fBX509_ACERT_get0_notAfter()\fR return
the \fBnotBefore\fR and \fBnotAfter\fR fields of certificate \fBx\fR respectively.
returned is an internal pointer which must not be freed up after
the call.
.PP
\&\fBX509_ACERT_set1_notBefore()\fR and \fBX509_ACERT_set1_notAfter()\fR set the \fBnotBefore\fR
and \fBnotAfter\fR fields of \fBx\fR to \fBtm\fR. Ownership of the passed
parameter \fBtm\fR is not transferred by these functions so it must
be freed up after the call.
.PP
\&\fBX509_CRL_get0_lastUpdate()\fR and \fBX509_CRL_get0_nextUpdate()\fR return the
\&\fBlastUpdate\fR and \fBnextUpdate\fR fields of \fIcrl\fR. The value
returned is an internal pointer which must not be freed up after
the call. If the \fBnextUpdate\fR field is absent from \fIcrl\fR then
\&\s-1NULL\s0 is returned.
.PP
\&\fBX509_CRL_set1_lastUpdate()\fR and \fBX509_CRL_set1_nextUpdate()\fR set the \fBlastUpdate\fR
and \fBnextUpdate\fR fields of \fIcrl\fR to \fItm\fR. Ownership of the passed parameter
\&\fItm\fR is not transferred by these functions so it must be freed up after the
call.
For \fBX509_CRL_set1_nextUpdate()\fR the \fItm\fR argument may be \s-1NULL,\s0
which implies removal of the optional \fBnextUpdate\fR field.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBX509_get0_notBefore()\fR, \fBX509_get0_notAfter()\fR and \fBX509_CRL_get0_lastUpdate()\fR
return a pointer to an \fB\s-1ASN1_TIME\s0\fR structure.
.PP
\&\fBX509_CRL_get0_lastUpdate()\fR return a pointer to an \fB\s-1ASN1_TIME\s0\fR structure
or \s-1NULL\s0 if the \fBlastUpdate\fR field is absent.
.PP
\&\fBX509_set1_notBefore()\fR, \fBX509_set1_notAfter()\fR, \fBX509_CRL_set1_lastUpdate()\fR and
\&\fBX509_CRL_set1_nextUpdate()\fR return 1 for success or 0 for failure.
.SH "NOTES"
.IX Header "NOTES"
Unlike the \fBX509\fR and \fBX509_CRL\fR routines, the \fBX509_ACERT\fR routines
use the \s-1ASN1_GENERALIZEDTIME\s0 format instead of \s-1ASN1_TIME\s0 for holding time
data.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBd2i_X509\fR\|(3),
\&\fBASN1_GENERALIZEDTIME_check\fR\|(3)
\&\fBERR_get_error\fR\|(3),
\&\fBX509_CRL_get0_by_serial\fR\|(3),
\&\fBX509_get0_signature\fR\|(3),
\&\fBX509_get_ext_d2i\fR\|(3),
\&\fBX509_get_extension_flags\fR\|(3),
\&\fBX509_get_pubkey\fR\|(3),
\&\fBX509_get_subject_name\fR\|(3),
\&\fBX509_NAME_add_entry_by_txt\fR\|(3),
\&\fBX509_NAME_ENTRY_get_object\fR\|(3),
\&\fBX509_NAME_get_index_by_NID\fR\|(3),
\&\fBX509_NAME_print_ex\fR\|(3),
\&\fBX509_new\fR\|(3),
\&\fBX509_sign\fR\|(3),
\&\fBX509V3_get_d2i\fR\|(3),
\&\fBX509_verify_cert\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fBX509_get_notBefore()\fR and \fBX509_get_notAfter()\fR were deprecated in OpenSSL
1.1.0.
.PP
\&\fBX509_ACERT_get0_notBefore()\fR, \fBX509_ACERT_get0_notAfter()\fR,
\&\fBX509_ACERT_set1_notBefore()\fR, \fBX509_ACERT_set1_notAfter()\fR
were added in OpenSSL 3.4.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2016\-2024 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.
