---
name: "gnutls_x509_crt_set_version"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_x509_crt_set_version"
---

# gnutls\_x509\_crt\_set\_version(3)

API function

## NAME

gnutls\_x509\_crt\_set\_version - API function

## SYNOPSIS

**#include \<gnutls/x509.h\>**

**int gnutls\_x509\_crt\_set\_version(gnutls\_x509\_crt\_t** *crt***, unsigned int** *version***);**

## ARGUMENTS

- gnutls\_x509\_crt\_t crt

  a certificate of type **gnutls\_x509\_crt\_t**

- unsigned int version

  holds the version number. For X.509v1 certificates must be 1.

## DESCRIPTION

This function will set the version of the certificate.  This must be one for X.509 version 1, and so on.  Plain certificates without extensions must have version set to one.

To create well-formed certificates, you must specify version 3 if you use any certificate extensions.  Extensions are created by functions such as **gnutls\_x509\_crt\_set\_subject\_alt\_name()** or **gnutls\_x509\_crt\_set\_key\_usage()**.

## RETURNS

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise a negative error value.

## REPORTING BUGS

Report bugs to \<bugs@gnutls.org\>.\
 Home page: https://www.gnutls.org

## COPYRIGHT

Copyright © 2001-2023 Free Software Foundation, Inc., and others.\
 Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

## SEE ALSO

The full documentation for **gnutls** is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit

- https://www.gnutls.org/manual/