diffie-hellman: Add a bool return value to get_my_public_value()

src/libcharon/plugins/ha/ha_dispatcher.c

@@ -88,10 +88,11 @@ METHOD(diffie_hellman_t, dh_get_shared_secret, bool,
 	return TRUE;
 }
 
-METHOD(diffie_hellman_t, dh_get_my_public_value, void,
+METHOD(diffie_hellman_t, dh_get_my_public_value, bool,
 	ha_diffie_hellman_t *this, chunk_t *value)
 {
 	*value = chunk_clone(this->pub);
+	return TRUE;
 }
 
 METHOD(diffie_hellman_t, dh_destroy, void,

src/libcharon/plugins/ha/ha_ike.c

@@ -127,9 +127,11 @@ METHOD(listener_t, ike_keys, bool,
 	chunk_clear(&secret);
 	if (ike_sa->get_version(ike_sa) == IKEV1)
 	{
-		dh->get_my_public_value(dh, &secret);
-		m->add_attribute(m, HA_LOCAL_DH, secret);
-		chunk_free(&secret);
+		if (dh->get_my_public_value(dh, &secret))
+		{
+			m->add_attribute(m, HA_LOCAL_DH, secret);
+			chunk_free(&secret);
+		}
 		m->add_attribute(m, HA_REMOTE_DH, dh_other);
 		if (shared)
 		{

src/libcharon/plugins/load_tester/load_tester_diffie_hellman.c

@@ -15,10 +15,11 @@
 
 #include "load_tester_diffie_hellman.h"
 
-METHOD(diffie_hellman_t, get_my_public_value, void,
+METHOD(diffie_hellman_t, get_my_public_value, bool,
 	load_tester_diffie_hellman_t *this, chunk_t *value)
 {
 	*value = chunk_empty;
+	return TRUE;
 }
 
 METHOD(diffie_hellman_t, set_other_public_value, void,