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/*
* Copyright 2016 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3, as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Charles Kerr <charles.kerr@canonical.com>
*/
#include <src/dbus-names.h>
#include <src/usb-snap.h>
#include <glib/gi18n.h>
#include <gio/gio.h>
/***
****
***/
class UsbSnap::Impl
{
public:
explicit Impl(const std::string& fingerprint):
m_fingerprint{fingerprint},
m_cancellable{g_cancellable_new()}
{
g_bus_get (G_BUS_TYPE_SESSION, m_cancellable, on_bus_ready_static, this);
}
~Impl()
{
g_cancellable_cancel(m_cancellable);
g_clear_object(&m_cancellable);
if (m_subscription_id != 0)
g_dbus_connection_signal_unsubscribe (m_bus, m_subscription_id);
if (m_notification_id != 0) {
GError* error {};
g_dbus_connection_call_sync(m_bus,
DBusNames::Notify::NAME,
DBusNames::Notify::PATH,
DBusNames::Notify::INTERFACE,
"CloseNotification",
g_variant_new("(u)", m_notification_id),
nullptr,
G_DBUS_CALL_FLAGS_NONE,
-1,
nullptr,
&error);
if (error != nullptr) {
g_warning("Error closing notification: %s", error->message);
g_clear_error(&error);
}
}
g_clear_object(&m_bus);
}
core::Signal<AdbdClient::PKResponse,bool>& on_user_response()
{
return m_on_user_response;
}
private:
static void on_bus_ready_static(GObject* /*source*/, GAsyncResult* res, gpointer gself)
{
GError* error {};
auto bus = g_bus_get_finish (res, &error);
if (error != nullptr) {
if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
g_warning("UsbSnap: Error getting session bus: %s", error->message);
g_clear_error(&error);
} else {
static_cast<Impl*>(gself)->on_bus_ready(bus);
}
g_clear_object(&bus);
}
void on_bus_ready(GDBusConnection* bus)
{
m_bus = G_DBUS_CONNECTION(g_object_ref(G_OBJECT(bus)));
m_subscription_id = g_dbus_connection_signal_subscribe(m_bus,
DBusNames::Notify::NAME,
DBusNames::Notify::INTERFACE,
nullptr,
DBusNames::Notify::PATH,
nullptr,
G_DBUS_SIGNAL_FLAGS_NONE,
on_notification_signal_static,
this,
nullptr);
auto body = g_strdup_printf(_("The computer's RSA key fingerprint is: %s"), m_fingerprint.c_str());
GVariantBuilder actions_builder;
g_variant_builder_init(&actions_builder, G_VARIANT_TYPE_STRING_ARRAY);
g_variant_builder_add(&actions_builder, "s", ACTION_ALLOW);
g_variant_builder_add(&actions_builder, "s", _("Allow"));
g_variant_builder_add(&actions_builder, "s", ACTION_DENY);
g_variant_builder_add(&actions_builder, "s", _("Don't Allow"));
GVariantBuilder hints_builder;
g_variant_builder_init(&hints_builder, G_VARIANT_TYPE_VARDICT);
g_variant_builder_add(&hints_builder, "{sv}", "x-canonical-non-shaped-icon", g_variant_new_string("true"));
g_variant_builder_add(&hints_builder, "{sv}", "x-canonical-snap-decisions", g_variant_new_string("true"));
g_variant_builder_add(&hints_builder, "{sv}", "x-canonical-private-affirmative-tint", g_variant_new_string("true"));
auto args = g_variant_new("(susssasa{sv}i)",
"",
uint32_t(0),
"computer-symbolic",
_("Allow USB Debugging?"),
body,
&actions_builder,
&hints_builder,
-1);
g_dbus_connection_call(m_bus,
DBusNames::Notify::NAME,
DBusNames::Notify::PATH,
DBusNames::Notify::INTERFACE,
"Notify",
args,
G_VARIANT_TYPE("(u)"),
G_DBUS_CALL_FLAGS_NONE,
-1, // timeout
m_cancellable,
on_notify_reply_static,
this);
g_clear_pointer(&body, g_free);
}
static void on_notify_reply_static(GObject* obus, GAsyncResult* res, gpointer gself)
{
GError* error {};
auto reply = g_dbus_connection_call_finish (G_DBUS_CONNECTION(obus), res, &error);
if (error != nullptr) {
if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
g_warning("UsbSnap: Error calling Notify: %s", error->message);
g_clear_error(&error);
} else {
uint32_t id {};
g_variant_get(reply, "(u)", &id);
static_cast<Impl*>(gself)->on_notify_reply(id);
}
g_clear_pointer(&reply, g_variant_unref);
}
void on_notify_reply(uint32_t id)
{
m_notification_id = id;
}
static void on_notification_signal_static(GDBusConnection* /*connection*/,
const gchar* /*sender_name*/,
const gchar* object_path,
const gchar* interface_name,
const gchar* signal_name,
GVariant* parameters,
gpointer gself)
{
g_return_if_fail(!g_strcmp0(object_path, DBusNames::Notify::PATH));
g_return_if_fail(!g_strcmp0(interface_name, DBusNames::Notify::INTERFACE));
auto self = static_cast<Impl*>(gself);
if (!g_strcmp0(signal_name, DBusNames::Notify::ActionInvoked::NAME))
{
uint32_t id {};
const char* action_name {};
g_variant_get(parameters, "(u&s)", &id, &action_name);
if (id == self->m_notification_id)
self->on_action_invoked(action_name);
}
else if (!g_strcmp0(signal_name, DBusNames::Notify::NotificationClosed::NAME))
{
uint32_t id {};
uint32_t close_reason {};
g_variant_get(parameters, "(uu)", &id, &close_reason);
if (id == self->m_notification_id)
self->on_notification_closed(close_reason);
}
}
void on_action_invoked(const char* action_name)
{
const auto response = !g_strcmp0(action_name, ACTION_ALLOW)
? AdbdClient::PKResponse::ALLOW
: AdbdClient::PKResponse::DENY;
// FIXME: the current default is to cover the most common use case.
// We need to get the notification ui's checkbox working ASAP so
// that the user can provide this flag
const bool remember_this_choice = response == AdbdClient::PKResponse::ALLOW;
m_on_user_response(response, remember_this_choice);
}
void on_notification_closed(uint32_t close_reason)
{
if (close_reason == DBusNames::Notify::NotificationClosed::Reason::EXPIRED)
m_on_user_response(AdbdClient::PKResponse::DENY, false);
m_notification_id = 0;
}
static constexpr char const * ACTION_ALLOW {"allow"};
static constexpr char const * ACTION_DENY {"deny"};
const std::string m_fingerprint;
core::Signal<AdbdClient::PKResponse,bool> m_on_user_response;
GCancellable* m_cancellable {};
GDBusConnection* m_bus {};
uint32_t m_notification_id {};
unsigned int m_subscription_id {};
};
/***
****
***/
UsbSnap::UsbSnap(const std::string& public_key):
impl{new Impl{public_key}}
{
}
UsbSnap::~UsbSnap()
{
}
core::Signal<AdbdClient::PKResponse,bool>&
UsbSnap::on_user_response()
{
return impl->on_user_response();
}
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