---
name: "gnutls_x509_crt_set_pin_function"
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_pin_function"
---

# gnutls\_x509\_crt\_set\_pin\_function(3)

API function

## NAME

gnutls\_x509\_crt\_set\_pin\_function - API function

## SYNOPSIS

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

**void gnutls\_x509\_crt\_set\_pin\_function(gnutls\_x509\_crt\_t** *crt***, gnutls\_pin\_callback\_t** *fn***, void \*** *userdata***);**

## ARGUMENTS

- gnutls\_x509\_crt\_t crt

  The certificate structure

- gnutls\_pin\_callback\_t fn

  the callback

- void \* userdata

  data associated with the callback

## DESCRIPTION

This function will set a callback function to be used when it is required to access a protected object. This function overrides the global function set using **gnutls\_pkcs11\_set\_pin\_function()**.

Note that this callback is currently used only during the import of a PKCS **11** certificate with **gnutls\_x509\_crt\_import\_url()**.

## SINCE

3\.1.0

## 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/