---
name: "gnutls_pkcs11_token_set_pin"
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_token_set_pin"
---

# gnutls\_pkcs11\_token\_set\_pin(3)

API function

## NAME

gnutls\_pkcs11\_token\_set\_pin - API function

## SYNOPSIS

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

**int gnutls\_pkcs11\_token\_set\_pin(const char \*** *token\_url***, const char \*** *oldpin***, const char \*** *newpin***, unsigned int** *flags***);**

## ARGUMENTS

- const char \* token\_url

  A PKCS **11** URL specifying a token

- const char \* oldpin

  old user's PIN

- const char \* newpin

  new user's PIN

- unsigned int flags

  one of **gnutls\_pin\_flag\_t**.

## DESCRIPTION

This function will modify or set a user or administrator's PIN for the given token.  If it is called to set a PIN for first time the oldpin must be **NULL**. When setting the admin's PIN with the **GNUTLS\_PIN\_SO** flag, the  *oldpin* value must be provided (this requirement is relaxed after GnuTLS 3.6.5 since which the PIN will be requested if missing).

## 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/