gnutls\_psk\_set\_server\_credentials\_function2(3) gnutls gnutls\_psk\_set\_server\_credentials\_function2(3)

# [NAME](#NAME)

gnutls\_psk\_set\_server\_credentials\_function2 - API function

# [SYNOPSIS](#SYNOPSIS)

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

**void gnutls\_psk\_set\_server\_credentials\_function2(gnutls\_psk\_server\_credentials\_t cred, gnutls\_psk\_server\_credentials\_function2 func);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_psk\_server\_credentials\_t cred](#gnutls_psk_server_credentials_t)

is a **gnutls\_psk\_server\_credentials\_t** type.

[gnutls\_psk\_server\_credentials\_function2 func](#gnutls_psk_server_credentials_function2)

is the callback function

# [DESCRIPTION](#DESCRIPTION)

This function can be used to set a callback to retrieve the user's PSK credentials. The callback's function form is: int (\*callback)(gnutls\_session\_t, const gnutls\_datum\_t* username, gnutls\_datum\_t* key);

This callback function has the same semantics as that of **gnutls\_psk\_set\_server\_credentials\_function()**, but it allows non-string usernames to be used.

*username* contains the actual username. The *key* must be filled in using the **gnutls\_malloc()**.

In case the callback returned a negative number then gnutls will assume that the username does not exist.

The callback function will only be called once per handshake. The callback function should return 0 on success, while -1 indicates an error.

# [REPORTING BUGS](#REPORTING_BUGS)

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

# [COPYRIGHT](#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](#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/](https://www.gnutls.org/manual/)

3.8.13 gnutls

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Document: gnutls_psk_set_server_credentials_function2(3) from gnutls 3.8.13-r3 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls