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.\" ========================================================================
.\"
.IX Title "X509_GET_VERSION 3"
.TH X509_GET_VERSION 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
X509_get_version, X509_set_version, X509_REQ_get_version, X509_REQ_set_version, X509_CRL_get_version, X509_CRL_set_version \- get or set certificate, certificate request or CRL version
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509.h>
\&
\& long X509_get_version(const X509 *x);
\& int X509_set_version(X509 *x, long version);
\&
\& long X509_REQ_get_version(const X509_REQ *req);
\& int X509_REQ_set_version(X509_REQ *x, long version);
\&
\& long X509_CRL_get_version(const X509_CRL *crl);
\& int X509_CRL_set_version(X509_CRL *x, long version);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBX509_get_version()\fR returns the numerical value of the version field of
certificate \fBx\fR. Note: this is defined by standards (X.509 et al) to be one
less than the certificate version. So a version 3 certificate will return 2 and
a version 1 certificate will return 0.
.PP
\&\fBX509_set_version()\fR sets the numerical value of the version field of certificate
\&\fBx\fR to \fBversion\fR.
.PP
Similarly \fBX509_REQ_get_version()\fR, \fBX509_REQ_set_version()\fR,
\&\fBX509_CRL_get_version()\fR and \fBX509_CRL_set_version()\fR get and set the version
number of certificate requests and CRLs.
.SH "NOTES"
.IX Header "NOTES"
The version field of certificates, certificate requests and CRLs has a
\&\s-1DEFAULT\s0 value of \fB\fBv1\fB\|(0)\fR meaning the field should be omitted for version
1. This is handled transparently by these functions.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBX509_get_version()\fR, \fBX509_REQ_get_version()\fR and \fBX509_CRL_get_version()\fR
return the numerical value of the version field.
.PP
\&\fBX509_set_version()\fR, \fBX509_REQ_set_version()\fR and \fBX509_CRL_set_version()\fR
return 1 for success and 0 for failure.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBd2i_X509\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_version()\fR, \fBX509_REQ_get_version()\fR and \fBX509_CRL_get_version()\fR are
functions in OpenSSL 1.1.0, in previous versions they were macros.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2015\-2016 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (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>.