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======================================================================== Title "X509_GET_VERSION 3ossl" X509_GET_VERSION 3ossl 2025-07-01 3.5.1 OpenSSL
For nroff, turn off justification. Always turn off hyphenation; it makes way too many mistakes in technical documents. NAME
X509_get_version, X509_set_version, X509_REQ_get_version, X509_REQ_set_version,
X509_ACERT_get_version, X509_ACERT_set_version, X509_CRL_get_version,
X509_CRL_set_version - get or set certificate,
certificate request or CRL version
SYNOPSIS
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);
\&
#include <
openssl/
x509_acert.h>
\&
int X509_ACERT_set_version(X509_ACERT *x, long version);
long X509_ACERT_get_version(const X509_ACERT *x);
.Ve
DESCRIPTION
Header "DESCRIPTION" \fBX509_get_version() returns the numerical value of the version field of
certificate
x. These correspond to the constants
X509_VERSION_1,
\fBX509_VERSION_2, and
X509_VERSION_3. Note: the values of these constants
are defined by standards (X.509 et al) to be one less than the certificate
version. So
X509_VERSION_3 has value 2 and
X509_VERSION_1 has value 0.
\fBX509_set_version() sets the numerical value of the version field of certificate
\fIx to version.
Similarly X509_REQ_get_version(), X509_REQ_set_version(),
\fBX509_ACERT_get_version(), X509_ACERT_set_version(),
\fBX509_CRL_get_version() and X509_CRL_set_version() get and set the version
number of certificate requests and CRLs. They use constants
\fBX509_REQ_VERSION_1, X509_ACERT_VERSION_2, X509_CRL_VERSION_1,
and X509_CRL_VERSION_2.
NOTES
Header "NOTES" The version field of certificates, certificate requests and CRLs has a
DEFAULT value of
v1\|(0) meaning the field should be omitted for version
1. This is handled transparently by these functions.
"RETURN VALUES"
Header "RETURN VALUES" \fBX509_get_version(),
X509_REQ_get_version() and
X509_CRL_get_version()
return the numerical value of the version field.
\fBX509_set_version(), X509_REQ_set_version() and X509_CRL_set_version()
return 1 for success and 0 for failure.
"SEE ALSO"
Header "SEE ALSO" \fBd2i_X509\|(3),
\fBERR_get_error\|(3),
\fBX509_CRL_get0_by_serial\|(3),
\fBX509_get0_signature\|(3),
\fBX509_get_ext_d2i\|(3),
\fBX509_get_extension_flags\|(3),
\fBX509_get_pubkey\|(3),
\fBX509_get_subject_name\|(3),
\fBX509_NAME_add_entry_by_txt\|(3),
\fBX509_NAME_ENTRY_get_object\|(3),
\fBX509_NAME_get_index_by_NID\|(3),
\fBX509_NAME_print_ex\|(3),
\fBX509_new\|(3),
\fBX509_sign\|(3),
\fBX509V3_get_d2i\|(3),
\fBX509_verify_cert\|(3)
HISTORY
Header "HISTORY" \fBX509_get_version(),
X509_REQ_get_version() and
X509_CRL_get_version() are
functions in OpenSSL 1.1.0, in previous versions they were macros.
\fBX509_ACERT_get_version(), X509_ACERT_set_version()
were added in OpenSSL 3.4.
COPYRIGHT
Header "COPYRIGHT" Copyright 2015-2024 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.