---
name: "gnutls_pkcs11_copy_attached_extension"
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_pkcs11_copy_attached_extension"
---

# gnutls\_pkcs11\_copy\_attached\_extension(3)

API function

## NAME

gnutls\_pkcs11\_copy\_attached\_extension - API function

## SYNOPSIS

**#include \<gnutls/pkcs11.h\>**

**int gnutls\_pkcs11\_copy\_attached\_extension(const char \*** *token\_url***, gnutls\_x509\_crt\_t** *crt***, gnutls\_datum\_t \*** *data***, const char \*** *label***, unsigned int** *flags***);**

## ARGUMENTS

- const char \* token\_url

  A PKCS **11** URL specifying a token

- gnutls\_x509\_crt\_t crt

  An X.509 certificate object

- gnutls\_datum\_t \* data

  the attached extension

- const char \* label

  A name to be used for the attached extension (may be **NULL**)

- unsigned int flags

  One of GNUTLS\_PKCS11\_OBJ\_FLAG\_\*

## DESCRIPTION

This function will copy an the attached extension in  *data* for the certificate provided in  *crt* in the PKCS **11** token specified by the URL (typically a trust module). The extension must be in RFC5280 Extension format.

## RETURNS

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

## SINCE

3\.3.8

## 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/