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/*
* Copyright (C) 2010 Stefan Walter
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gcr-key-mechanisms.h"
#include <glib/gi18n-lib.h>
static gboolean
check_have_attributes (GckAttributes *attrs,
const gulong *types,
gsize n_types)
{
gsize i;
for (i = 0; i < n_types; i++) {
if (!gck_attributes_find (attrs, types[i]))
return FALSE;
}
return TRUE;
}
static gulong
find_first_usable_mechanism (GckObject *key,
GckAttributes *attrs,
const gulong *mechanisms,
gsize n_mechanisms,
gulong action_attr_type)
{
GckSession *session;
GckSlot *slot;
GArray *mechs;
gboolean can;
gsize i;
if (gck_attributes_find_boolean (attrs, action_attr_type, &can) && !can) {
g_debug ("key not capable of needed action");
return GCK_INVALID;
}
session = gck_object_get_session (key);
slot = gck_session_get_slot (session);
mechs = gck_slot_get_mechanisms (slot);
g_object_unref (slot);
g_object_unref (session);
if (!mechs) {
g_debug ("couldn't get slot mechanisms");
return GCK_INVALID;
}
for (i = 0; i < n_mechanisms; i++) {
if (gck_mechanisms_check (mechs, mechanisms[i], GCK_INVALID))
break;
}
g_array_unref (mechs);
if (i < n_mechanisms)
return mechanisms[i];
return GCK_INVALID;
}
gulong
_gcr_key_mechanisms_check (GckObject *key,
const gulong *mechanisms,
gsize n_mechanisms,
gulong action_attr_type,
GCancellable *cancellable,
GError **error)
{
gulong attr_types[] = { action_attr_type };
GckAttributes *attrs = NULL;
gulong result;
g_return_val_if_fail (GCK_IS_OBJECT (key), GCK_INVALID);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), GCK_INVALID);
g_return_val_if_fail (error == NULL || *error == NULL, GCK_INVALID);
if (GCK_IS_OBJECT_CACHE (key)) {
attrs = gck_object_cache_get_attributes (GCK_OBJECT_CACHE (key));
if (!check_have_attributes (attrs, attr_types, G_N_ELEMENTS (attr_types))) {
gck_attributes_unref (attrs);
attrs = NULL;
}
}
if (attrs == NULL) {
attrs = gck_object_get_full (key, attr_types, G_N_ELEMENTS (attr_types),
cancellable, error);
}
if (!attrs)
return GCK_INVALID;
result = find_first_usable_mechanism (key, attrs, mechanisms, n_mechanisms, action_attr_type);
gck_attributes_unref (attrs);
return result;
}
typedef struct {
gulong *mechanisms;
gsize n_mechanisms;
gulong action_attr_type;
} CheckClosure;
static void
check_closure_free (gpointer data)
{
CheckClosure *closure = data;
g_free (closure->mechanisms);
g_free (closure);
}
static void
on_check_get_attributes (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
GTask *task = G_TASK (user_data);
GckAttributes *attrs;
GError *error = NULL;
attrs = gck_object_cache_lookup_finish (GCK_OBJECT (source), result, &error);
if (error != NULL)
g_task_return_error (task, g_steal_pointer (&error));
else
g_task_return_pointer (task, attrs, gck_attributes_unref);
g_clear_object (&task);
}
void
_gcr_key_mechanisms_check_async (GckObject *key,
const gulong *mechanisms,
gsize n_mechanisms,
gulong action_attr_type,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
gulong attr_types[] = { action_attr_type };
CheckClosure *closure;
GTask *task;
g_return_if_fail (GCK_IS_OBJECT (key));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (key, cancellable, callback, user_data);
g_task_set_source_tag (task, _gcr_key_mechanisms_check_async);
closure = g_new0 (CheckClosure, 1);
closure->mechanisms = g_memdup2 (mechanisms, n_mechanisms * sizeof (gulong));
closure->n_mechanisms = n_mechanisms;
closure->action_attr_type = action_attr_type;
g_task_set_task_data (task, closure, check_closure_free);
gck_object_cache_lookup_async (key, attr_types, G_N_ELEMENTS (attr_types),
cancellable, on_check_get_attributes,
g_steal_pointer (&task));
g_clear_object (&task);
}
gulong
_gcr_key_mechanisms_check_finish (GckObject *key,
GAsyncResult *result,
GError **error)
{
CheckClosure *closure;
GckAttributes *attrs;
gulong ret = GCK_INVALID;
g_return_val_if_fail (GCK_IS_OBJECT (key), GCK_INVALID);
g_return_val_if_fail (error == NULL || *error == NULL, GCK_INVALID);
g_return_val_if_fail (g_task_is_valid (result, key), GCK_INVALID);
g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) ==
_gcr_key_mechanisms_check_async, GCK_INVALID);
closure = g_task_get_task_data (G_TASK (result));
attrs = g_task_propagate_pointer (G_TASK (result), error);
if (!attrs)
return GCK_INVALID;
ret = find_first_usable_mechanism (GCK_OBJECT (key), attrs,
closure->mechanisms, closure->n_mechanisms,
closure->action_attr_type);
gck_attributes_unref (attrs);
return ret;
}
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