API function


#include <gnutls/gnutls.h>

void gnutls_psk_set_client_credentials_function2(gnutls_psk_client_credentials_t          cred, gnutls_psk_client_credentials_function2          * func);


gnutls_psk_client_credentials_t          cred

is a gnutls_psk_server_credentials_t type.

gnutls_psk_client_credentials_function2          * 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, gnutls_datum_t* username, gnutls_datum_t* key);

This callback function has the same semantics as that of gnutls_psk_set_client_credentials_function(), but it allows non-string usernames to be used.

The  username and  key ->data must be allocated using gnutls_malloc(). The  username should be an ASCII string or UTF-8 string. In case of a UTF-8 string it is recommended to be following the PRECIS framework for usernames (rfc8265).

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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See Also

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3.8.0 gnutls