[gnutls-devel] GnuTLS | support non-NULL-terminated PSKs (!917)

[Development of GNU's TLS library]

Ander Juaristi commented on a discussion on lib/psk.c: https://gitlab.com/gnutls/gnutls/merge_requests/917#note_232875770

> + **/
> +void
> +gnutls_psk_set_server_credentials_function2(gnutls_psk_server_credentials_t cred,
> +					    gnutls_psk_server_credentials_function2 func)
>  {
>  	cred->pwd_callback = func;
> +	cred->pwd_callback_legacy = NULL;
> +}
> +
> +static int call_client_callback_legacy(gnutls_session_t session,
> +				       gnutls_datum_t *username,
> +				       gnutls_datum_t *key)
> +{
> +	int ret;
> +	char *user_p;
> +	gnutls_psk_client_credentials_t cred =

The `cred` pointer is dereferenced below, in [line 371](https://gitlab.com/gnutls/gnutls/blob/ajuaristi-issue-586/lib/psk.c#L371):

```
ret = cred->get_function_legacy(session, &user_p, key);
```

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