---
name: "gnutls_sign_callback_get"
section: "3"
platform: "linux"
package: "gnutls-doc"
version: "3.3.8-6+deb8u7"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_sign_callback_get"
---

# gnutls\_sign\_callback\_get(3)

API function

## NAME

gnutls\_sign\_callback\_get - API function

## SYNOPSIS

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

**gnutls\_sign\_func gnutls\_sign\_callback\_get(gnutls\_session\_t** *session***, void \*\*** *userdata***);**

## ARGUMENTS

- gnutls\_session\_t session

  is a gnutls session

- void \*\* userdata

  if non-**NULL**, will be set to abstract callback pointer.

## DESCRIPTION

Retrieve the callback function, and its userdata pointer.

## RETURNS

The function pointer set by **gnutls\_sign\_callback\_set()**, or if not set, **NULL**.

## DEPRECATED

Use the PKCS 11 interfaces instead.

## REPORTING BUGS

Report bugs to \<bugs@gnutls.org\>.\
 Home page: http://www.gnutls.org

## COPYRIGHT

Copyright © 2001-2014 Free Software Foundation, Inc..\
 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

- http://www.gnutls.org/manual/