NAME

gnutls_psk_set_client_credentials_function3 - API function

SYNOPSIS

#include <gnutls/gnutls.h>

void gnutls_psk_set_client_credentials_function3(gnutls_psk_client_credentials_t cred, gnutls_psk_client_credentials_function3 * func);

ARGUMENTS

gnutls_psk_client_credentials_t cred: is a gnutls_psk_server_credentials_t type.
gnutls_psk_client_credentials_function3 * func: is the callback function

DESCRIPTION

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, gnutls_datum_t* context, gnutls_psk_key_flags *flags);

This callback function has the same semantics as that of gnutls_psk_set_client_credentials_function2(), but it returns flags associated with the key. The callback may import external PSK using the method described in RFC 9258 by using gnutls_psk_format_imported_identity().

The data field of username , key , and context 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.

REPORTING BUGS

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

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