core: add NMAuthSubject object to encapsulate authentication info
This object encapsulates all authentication information we need about some entity that requests that NetworkManager perform an action on its behalf.
This commit is contained in:
Dan Williams
@@ -248,6 +248,8 @@ nm_sources = \
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nm-ip6-config.h \
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nm-manager-auth.c \
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nm-manager-auth.h \
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nm-auth-subject.c \
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nm-auth-subject.h \
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nm-manager.c \
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nm-manager.h \
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nm-netlink-monitor.c \
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@@ -9,6 +9,7 @@ AM_CPPFLAGS = \
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-I${top_builddir}/libnm-util \
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-I${top_srcdir}/libnm-util \
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$(DBUS_CFLAGS) \
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$(POLKIT_CFLAGS) \
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$(IWMX_SDK_CFLAGS) \
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$(LIBNL_CFLAGS) \
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$(GUDEV_CFLAGS)
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210
src/nm-auth-subject.c
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210
src/nm-auth-subject.c
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@@ -0,0 +1,210 @@
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* NetworkManager -- Network link manager
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright (C) 2013 Red Hat, Inc.
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*/
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/**
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* SECTION:nm-auth-subject
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* @short_description: Encapsulates authentication information about a requestor
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*
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* #NMAuthSubject encpasulates identifying information about an entity that
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* makes requests, like process identifier and user UID.
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*/
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#include <config.h>
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#include <glib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#if WITH_POLKIT
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#include <polkit/polkit.h>
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#endif
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#include "nm-auth-subject.h"
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#include "nm-dbus-manager.h"
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G_DEFINE_TYPE (NMAuthSubject, nm_auth_subject, G_TYPE_OBJECT)
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#define NM_AUTH_SUBJECT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_AUTH_SUBJECT, NMAuthSubjectPrivate))
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typedef struct {
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gulong pid;
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gulong uid;
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char *dbus_sender;
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#if WITH_POLKIT
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PolkitSubject *pk_subject;
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#endif
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} NMAuthSubjectPrivate;
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static NMAuthSubject *
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_new_common (DBusGMethodInvocation *context,
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DBusConnection *connection,
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DBusMessage *message,
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gboolean internal)
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{
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NMAuthSubject *subject;
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NMAuthSubjectPrivate *priv;
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NMDBusManager *dbus_mgr;
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gboolean success = FALSE;
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g_return_val_if_fail (context || (connection && message) || internal, NULL);
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if (internal)
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g_return_val_if_fail (context == NULL && connection == NULL && message == NULL, NULL);
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subject = NM_AUTH_SUBJECT (g_object_new (NM_TYPE_AUTH_SUBJECT, NULL));
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priv = NM_AUTH_SUBJECT_GET_PRIVATE (subject);
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dbus_mgr = nm_dbus_manager_get ();
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if (internal) {
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priv->uid = 0;
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priv->pid = 0;
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return subject;
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}
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if (context) {
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success = nm_dbus_manager_get_caller_info (dbus_mgr,
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context,
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&priv->dbus_sender,
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&priv->uid,
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&priv->pid);
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} else if (message) {
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success = nm_dbus_manager_get_caller_info_from_message (dbus_mgr,
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connection,
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message,
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&priv->dbus_sender,
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&priv->uid,
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&priv->pid);
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} else
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g_assert_not_reached ();
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if (!success) {
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g_object_unref (subject);
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return NULL;
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}
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g_assert (priv->dbus_sender);
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g_assert_cmpuint (priv->pid, !=, 0);
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#if WITH_POLKIT
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/* FIXME: should we use polkit_unix_session_new() to store the session ID
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* of a short-lived process, so that the process can exit but we can still
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* ask that user for authorization?
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*/
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priv->pk_subject = polkit_unix_process_new_for_owner (priv->pid, 0, priv->uid);
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if (!priv->pk_subject)
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return NULL;
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#endif
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return subject;
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}
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NMAuthSubject *
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nm_auth_subject_new_from_context (DBusGMethodInvocation *context)
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{
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return _new_common (context, NULL, NULL, FALSE);
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}
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NMAuthSubject *
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nm_auth_subject_new_from_message (DBusConnection *connection,
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DBusMessage *message)
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{
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return _new_common (NULL, connection, message, FALSE);
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}
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/**
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* nm_auth_subject_new_internal():
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*
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* Creates a new auth subject representing the NetworkManager process itself.
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*
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* Returns: the new #NMAuthSubject
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*/
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NMAuthSubject *
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nm_auth_subject_new_internal (void)
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{
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return _new_common (NULL, NULL, NULL, TRUE);
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}
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/**************************************************************/
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gulong
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nm_auth_subject_get_uid (NMAuthSubject *subject)
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{
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return NM_AUTH_SUBJECT_GET_PRIVATE (subject)->uid;
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}
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const char *
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nm_auth_subject_get_dbus_sender (NMAuthSubject *subject)
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{
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return NM_AUTH_SUBJECT_GET_PRIVATE (subject)->dbus_sender;
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}
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gboolean
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nm_auth_subject_get_internal (NMAuthSubject *subject)
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{
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/* internal requests will have no dbus sender */
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return NM_AUTH_SUBJECT_GET_PRIVATE (subject)->dbus_sender ? FALSE : TRUE;
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}
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#if WITH_POLKIT
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PolkitSubject *
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nm_auth_subject_get_polkit_subject (NMAuthSubject *subject)
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{
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return NM_AUTH_SUBJECT_GET_PRIVATE (subject)->pk_subject;
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}
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#endif
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/******************************************************************/
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static void
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nm_auth_subject_init (NMAuthSubject *self)
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{
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NMAuthSubjectPrivate *priv = NM_AUTH_SUBJECT_GET_PRIVATE (self);
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priv->pid = G_MAXULONG;
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priv->uid = G_MAXULONG;
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}
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static void
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finalize (GObject *object)
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{
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NMAuthSubjectPrivate *priv = NM_AUTH_SUBJECT_GET_PRIVATE (object);
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g_free (priv->dbus_sender);
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#if WITH_POLKIT
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if (priv->pk_subject)
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g_object_unref (priv->pk_subject);
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#endif
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G_OBJECT_CLASS (nm_auth_subject_parent_class)->finalize (object);
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}
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static void
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nm_auth_subject_class_init (NMAuthSubjectClass *config_class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (config_class);
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g_type_class_add_private (config_class, sizeof (NMAuthSubjectPrivate));
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/* virtual methods */
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object_class->finalize = finalize;
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}
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68
src/nm-auth-subject.h
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68
src/nm-auth-subject.h
Normal file
@@ -0,0 +1,68 @@
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* NetworkManager -- Network link manager
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright (C) 2013 Red Hat, Inc.
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*/
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#ifndef NM_AUTH_SUBJECT_H
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#define NM_AUTH_SUBJECT_H
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#include <config.h>
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#include <glib.h>
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#include <glib-object.h>
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#include <dbus/dbus.h>
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#include <dbus/dbus-glib.h>
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#if WITH_POLKIT
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#include <polkit/polkit.h>
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#endif
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#define NM_TYPE_AUTH_SUBJECT (nm_auth_subject_get_type ())
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#define NM_AUTH_SUBJECT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), NM_TYPE_AUTH_SUBJECT, NMAuthSubject))
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#define NM_AUTH_SUBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), NM_TYPE_AUTH_SUBJECT, NMAuthSubjectClass))
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#define NM_IS_AUTH_SUBJECT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), NM_TYPE_AUTH_SUBJECT))
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#define NM_IS_AUTH_SUBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), NM_TYPE_AUTH_SUBJECT))
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#define NM_AUTH_SUBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), NM_TYPE_AUTH_SUBJECT, NMAuthSubjectClass))
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typedef struct {
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GObject parent;
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} NMAuthSubject;
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typedef struct {
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GObjectClass parent;
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} NMAuthSubjectClass;
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GType nm_auth_subject_get_type (void);
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NMAuthSubject *nm_auth_subject_new_from_context (DBusGMethodInvocation *context);
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NMAuthSubject *nm_auth_subject_new_from_message (DBusConnection *connection, DBusMessage *message);
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NMAuthSubject *nm_auth_subject_new_internal (void);
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gulong nm_auth_subject_get_uid (NMAuthSubject *subject);
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const char *nm_auth_subject_get_dbus_sender (NMAuthSubject *subject);
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gboolean nm_auth_subject_get_internal (NMAuthSubject *subject);
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#if WITH_POLKIT
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PolkitSubject *nm_auth_subject_get_polkit_subject (NMAuthSubject *subject);
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#endif
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#endif /* NM_AUTH_SUBJECT_H */
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