gnutls_psk_set_client_credentials_function — API function


#include <gnutls/gnutls.h>
void gnutls_psk_set_client_credentials_function( gnutls_psk_client_credentials_t cred,
  gnutls_psk_client_credentials_function * func);


gnutls_psk_client_credentials_t cred

is a gnutls_psk_server_credentials_t structure.

gnutls_psk_client_credentials_function * func

is the callback function


This function can be used to set a callback to retrieve the username and password for client PSK authentication. The callback's function form is: int (*callback)(gnutls_session_t, char** username, gnutls_datum_t* key);

The username and key −>data must be allocated using gnutls_malloc(). username should be ASCII strings or UTF−8 strings prepared using the "SASLprep" profile of "stringprep".

The callback function will be called once per handshake.

The callback function should return 0 on success. −1 indicates an error.


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The full documentation for gnutls is maintained as a Texinfo manual. If the info and gnutls programs are properly installed at your site, the command

info gnutls

should give you access to the complete manual. As an alternative you may obtain the manual from:


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