---
name: "gnutls_x509_crt_set_key"
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_key"
---

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

API function

## NAME

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

## SYNOPSIS

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

**int gnutls\_x509\_crt\_set\_key(gnutls\_x509\_crt\_t** *crt***, gnutls\_x509\_privkey\_t** *key***);**

## ARGUMENTS

- gnutls\_x509\_crt\_t crt

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

- gnutls\_x509\_privkey\_t key

  holds a private key

## DESCRIPTION

This function will set the public parameters from the given private key to the certificate.

To export the public key (i.e., the SubjectPublicKeyInfo part), check **gnutls\_pubkey\_import\_x509()**.

## 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/