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glib2.0/gio/gunixcredentialsmessage.c

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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2010 Red Hat, Inc.
* Copyright (C) 2009 Codethink Limited
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library 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.
*
* See the included COPYING file for more information.
*
* Authors: David Zeuthen <davidz@redhat.com>
*/
/**
* SECTION:gunixcredentialsmessage
* @title: GUnixCredentialsMessage
* @short_description: A GSocketControlMessage containing credentials
* @include: gio/gunixcredentialsmessage.h
* @see_also: #GUnixConnection, #GSocketControlMessage
*
* This #GSocketControlMessage contains a #GCredentials instance. It
* may be sent using g_socket_send_message() and received using
* g_socket_receive_message() over UNIX sockets (ie: sockets in the
* %G_SOCKET_FAMILY_UNIX family).
*
* For an easier way to send and receive credentials over
* stream-oriented UNIX sockets, see
* g_unix_connection_send_credentials() and
* g_unix_connection_receive_credentials(). To receive credentials of
* a foreign process connected to a socket, use
* g_socket_get_credentials().
*
* Since GLib 2.72, #GUnixCredentialMessage is available on all platforms. It
* requires underlying system support (such as Windows 10 with `AF_UNIX`) at run
* time.
*
* Before GLib 2.72, `<gio/gunixcredentialsmessage.h>` belonged to the UNIX-specific
* GIO interfaces, thus you had to use the `gio-unix-2.0.pc` pkg-config file
* when using it. This is no longer necessary since GLib 2.72.
*/
#include "config.h"
/* ---------------------------------------------------------------------------------------------------- */
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "gunixcredentialsmessage.h"
#include "gcredentials.h"
#include "gcredentialsprivate.h"
#include "gnetworking.h"
#include "glibintl.h"
struct _GUnixCredentialsMessagePrivate
{
GCredentials *credentials;
};
enum
{
PROP_0,
PROP_CREDENTIALS
};
G_DEFINE_TYPE_WITH_PRIVATE (GUnixCredentialsMessage, g_unix_credentials_message, G_TYPE_SOCKET_CONTROL_MESSAGE)
static gsize
g_unix_credentials_message_get_size (GSocketControlMessage *message)
{
#if G_CREDENTIALS_UNIX_CREDENTIALS_MESSAGE_SUPPORTED
return G_CREDENTIALS_NATIVE_SIZE;
#else
return 0;
#endif
}
static int
g_unix_credentials_message_get_level (GSocketControlMessage *message)
{
#if G_CREDENTIALS_UNIX_CREDENTIALS_MESSAGE_SUPPORTED
return SOL_SOCKET;
#else
return 0;
#endif
}
static int
g_unix_credentials_message_get_msg_type (GSocketControlMessage *message)
{
#if G_CREDENTIALS_USE_LINUX_UCRED
return SCM_CREDENTIALS;
#elif G_CREDENTIALS_USE_FREEBSD_CMSGCRED
return SCM_CREDS;
#elif G_CREDENTIALS_USE_NETBSD_UNPCBID
return SCM_CREDS;
#elif G_CREDENTIALS_USE_SOLARIS_UCRED
return SCM_UCRED;
#elif G_CREDENTIALS_UNIX_CREDENTIALS_MESSAGE_SUPPORTED
#error "G_CREDENTIALS_UNIX_CREDENTIALS_MESSAGE_SUPPORTED is set but there is no msg_type defined for this platform"
#else
/* includes G_CREDENTIALS_USE_APPLE_XUCRED */
return 0;
#endif
}
static GSocketControlMessage *
g_unix_credentials_message_deserialize (gint level,
gint type,
gsize size,
gpointer data)
{
#if G_CREDENTIALS_UNIX_CREDENTIALS_MESSAGE_SUPPORTED
GSocketControlMessage *message;
GCredentials *credentials;
if (level != SOL_SOCKET || type != g_unix_credentials_message_get_msg_type (NULL))
return NULL;
if (size != G_CREDENTIALS_NATIVE_SIZE)
{
g_warning ("Expected a credentials struct of %" G_GSIZE_FORMAT " bytes but "
"got %" G_GSIZE_FORMAT " bytes of data",
G_CREDENTIALS_NATIVE_SIZE, size);
return NULL;
}
credentials = g_credentials_new ();
g_credentials_set_native (credentials, G_CREDENTIALS_NATIVE_TYPE, data);
if (g_credentials_get_unix_user (credentials, NULL) == (uid_t) -1)
{
/* This happens on Linux if the remote side didn't pass the credentials */
g_object_unref (credentials);
return NULL;
}
message = g_unix_credentials_message_new_with_credentials (credentials);
g_object_unref (credentials);
return message;
#else /* !G_CREDENTIALS_UNIX_CREDENTIALS_MESSAGE_SUPPORTED */
return NULL;
#endif
}
static void
g_unix_credentials_message_serialize (GSocketControlMessage *_message,
gpointer data)
{
#if G_CREDENTIALS_UNIX_CREDENTIALS_MESSAGE_SUPPORTED
GUnixCredentialsMessage *message = G_UNIX_CREDENTIALS_MESSAGE (_message);
memcpy (data,
g_credentials_get_native (message->priv->credentials,
G_CREDENTIALS_NATIVE_TYPE),
G_CREDENTIALS_NATIVE_SIZE);
#endif
}
static void
g_unix_credentials_message_finalize (GObject *object)
{
GUnixCredentialsMessage *message = G_UNIX_CREDENTIALS_MESSAGE (object);
if (message->priv->credentials != NULL)
g_object_unref (message->priv->credentials);
G_OBJECT_CLASS (g_unix_credentials_message_parent_class)->finalize (object);
}
static void
g_unix_credentials_message_init (GUnixCredentialsMessage *message)
{
message->priv = g_unix_credentials_message_get_instance_private (message);
}
static void
g_unix_credentials_message_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GUnixCredentialsMessage *message = G_UNIX_CREDENTIALS_MESSAGE (object);
switch (prop_id)
{
case PROP_CREDENTIALS:
g_value_set_object (value, message->priv->credentials);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_unix_credentials_message_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GUnixCredentialsMessage *message = G_UNIX_CREDENTIALS_MESSAGE (object);
switch (prop_id)
{
case PROP_CREDENTIALS:
message->priv->credentials = g_value_dup_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_unix_credentials_message_constructed (GObject *object)
{
GUnixCredentialsMessage *message = G_UNIX_CREDENTIALS_MESSAGE (object);
if (message->priv->credentials == NULL)
message->priv->credentials = g_credentials_new ();
if (G_OBJECT_CLASS (g_unix_credentials_message_parent_class)->constructed != NULL)
G_OBJECT_CLASS (g_unix_credentials_message_parent_class)->constructed (object);
}
static void
g_unix_credentials_message_class_init (GUnixCredentialsMessageClass *class)
{
GSocketControlMessageClass *scm_class;
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (class);
gobject_class->get_property = g_unix_credentials_message_get_property;
gobject_class->set_property = g_unix_credentials_message_set_property;
gobject_class->finalize = g_unix_credentials_message_finalize;
gobject_class->constructed = g_unix_credentials_message_constructed;
scm_class = G_SOCKET_CONTROL_MESSAGE_CLASS (class);
scm_class->get_size = g_unix_credentials_message_get_size;
scm_class->get_level = g_unix_credentials_message_get_level;
scm_class->get_type = g_unix_credentials_message_get_msg_type;
scm_class->serialize = g_unix_credentials_message_serialize;
scm_class->deserialize = g_unix_credentials_message_deserialize;
/**
* GUnixCredentialsMessage:credentials:
*
* The credentials stored in the message.
*
* Since: 2.26
*/
g_object_class_install_property (gobject_class,
PROP_CREDENTIALS,
g_param_spec_object ("credentials",
P_("Credentials"),
P_("The credentials stored in the message"),
G_TYPE_CREDENTIALS,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_unix_credentials_message_is_supported:
*
* Checks if passing #GCredentials on a #GSocket is supported on this platform.
*
* Returns: %TRUE if supported, %FALSE otherwise
*
* Since: 2.26
*/
gboolean
g_unix_credentials_message_is_supported (void)
{
#if G_CREDENTIALS_UNIX_CREDENTIALS_MESSAGE_SUPPORTED
return TRUE;
#else
return FALSE;
#endif
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_unix_credentials_message_new:
*
* Creates a new #GUnixCredentialsMessage with credentials matching the current processes.
*
* Returns: a new #GUnixCredentialsMessage
*
* Since: 2.26
*/
GSocketControlMessage *
g_unix_credentials_message_new (void)
{
g_return_val_if_fail (g_unix_credentials_message_is_supported (), NULL);
return g_object_new (G_TYPE_UNIX_CREDENTIALS_MESSAGE,
NULL);
}
/**
* g_unix_credentials_message_new_with_credentials:
* @credentials: A #GCredentials object.
*
* Creates a new #GUnixCredentialsMessage holding @credentials.
*
* Returns: a new #GUnixCredentialsMessage
*
* Since: 2.26
*/
GSocketControlMessage *
g_unix_credentials_message_new_with_credentials (GCredentials *credentials)
{
g_return_val_if_fail (G_IS_CREDENTIALS (credentials), NULL);
g_return_val_if_fail (g_unix_credentials_message_is_supported (), NULL);
return g_object_new (G_TYPE_UNIX_CREDENTIALS_MESSAGE,
"credentials", credentials,
NULL);
}
/**
* g_unix_credentials_message_get_credentials:
* @message: A #GUnixCredentialsMessage.
*
* Gets the credentials stored in @message.
*
* Returns: (transfer none): A #GCredentials instance. Do not free, it is owned by @message.
*
* Since: 2.26
*/
GCredentials *
g_unix_credentials_message_get_credentials (GUnixCredentialsMessage *message)
{
g_return_val_if_fail (G_IS_UNIX_CREDENTIALS_MESSAGE (message), NULL);
return message->priv->credentials;
}
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