---
name: "gnutls_pubkey_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_pubkey_set_pin_function"
---

# gnutls\_pubkey\_set\_pin\_function(3)

API function

## NAME

gnutls\_pubkey\_set\_pin\_function - API function

## SYNOPSIS

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

**void gnutls\_pubkey\_set\_pin\_function(gnutls\_pubkey\_t** *key***, gnutls\_pin\_callback\_t** *fn***, void \*** *userdata***);**

## ARGUMENTS

- gnutls\_pubkey\_t key

  A key of type **gnutls\_pubkey\_t**

- 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 required to access the object. This function overrides any other global PIN functions.

Note that this function must be called right after initialization to have effect.

## 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/