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/*
* Copyright (C) 2010-2011 Robert Ancell.
* Author: Robert Ancell <robert.ancell@canonical.com>
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version. See http://www.gnu.org/copyleft/gpl.html the full text of the
* license.
*/
#include <string.h>
#include <unistd.h>
#include <pwd.h>
#include <sys/stat.h>
#include "xauth.h"
struct XAuthorizationPrivate
{
/* User who is using this authorization */
gchar *username;
/* Authorization scheme */
gchar *authorization_name;
/* Authorization data */
guchar *authorization_data;
gsize authorization_data_length;
};
G_DEFINE_TYPE (XAuthorization, xauth, G_TYPE_OBJECT);
XAuthorization *
xauth_new (const gchar *name, const guchar *data, gsize data_length)
{
XAuthorization *auth = g_object_new (XAUTH_TYPE, NULL);
auth->priv->authorization_name = g_strdup (name);
auth->priv->authorization_data = g_malloc (data_length);
auth->priv->authorization_data_length = data_length;
memcpy (auth->priv->authorization_data, data, data_length);
return auth;
}
XAuthorization *xauth_new_cookie (void)
{
guchar cookie[16];
gint i;
for (i = 0; i < 16; i++)
cookie[i] = g_random_int () & 0xFF;
return xauth_new ("MIT-MAGIC-COOKIE-1", cookie, 16);
}
const gchar *
xauth_get_authorization_name (XAuthorization *auth)
{
return auth->priv->authorization_name;
}
const guchar *
xauth_get_authorization_data (XAuthorization *auth)
{
return auth->priv->authorization_data;
}
guchar *
xauth_copy_authorization_data (XAuthorization *auth)
{
guchar *data = g_malloc (auth->priv->authorization_data_length);
memcpy (data, auth->priv->authorization_data, auth->priv->authorization_data_length);
return data;
}
gsize
xauth_get_authorization_data_length (XAuthorization *auth)
{
return auth->priv->authorization_data_length;
}
static void
write_uint16 (GString *string, guint16 value)
{
g_string_append_c (string, (gchar) (value >> 8));
g_string_append_c (string, (gchar) value);
}
static void
write_data (GString *string, guchar *value, gsize value_len)
{
g_string_append_len (string, (gchar *) value, value_len);
}
static void
write_string (GString *string, const gchar *value)
{
write_uint16 (string, strlen (value));
g_string_append (string, value);
}
GFile *
xauth_write (XAuthorization *auth, const gchar *username, const gchar *path, GError **error)
{
GFile *file;
GFileOutputStream *stream;
GString *data;
gboolean result;
gsize n_written;
file = g_file_new_for_path (path);
stream = g_file_replace (file, NULL, FALSE, G_FILE_CREATE_PRIVATE, NULL, error);
if (!stream)
{
g_object_unref (file);
return FALSE;
}
/* NOTE: Would like to do:
* g_file_set_attribute_string (file, G_FILE_ATTRIBUTE_OWNER_USER, username, G_FILE_QUERY_INFO_NONE, NULL, error))
* but not supported. */
if (username)
{
int result = -1;
struct passwd *info;
info = getpwnam (username);
if (info)
result = chown (path, info->pw_uid, info->pw_gid);
if (result != 0)
g_warning ("Failed to set authorization owner");
}
data = g_string_sized_new (1024);
write_uint16 (data, 0xFFFF); /* FamilyWild - this entry is used for all connections */
write_string (data, ""); /* Not requires as using FamilyWild */
write_string (data, ""); /* Not requires as using FamilyWild */
write_string (data, auth->priv->authorization_name);
write_uint16 (data, auth->priv->authorization_data_length);
write_data (data, auth->priv->authorization_data, auth->priv->authorization_data_length);
result = g_output_stream_write_all (G_OUTPUT_STREAM (stream), data->str, data->len, &n_written, NULL, error);
g_string_free (data, TRUE);
g_object_unref (stream);
if (!result)
{
g_object_unref (file);
file = NULL;
}
return file;
}
static void
xauth_init (XAuthorization *auth)
{
auth->priv = G_TYPE_INSTANCE_GET_PRIVATE (auth, XAUTH_TYPE, XAuthorizationPrivate);
}
static void
xauth_finalize (GObject *object)
{
XAuthorization *self;
self = XAUTH (object);
g_free (self->priv->username);
g_free (self->priv->authorization_name);
g_free (self->priv->authorization_data);
G_OBJECT_CLASS (xauth_parent_class)->finalize (object);
}
static void
xauth_class_init (XAuthorizationClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = xauth_finalize;
g_type_class_add_private (klass, sizeof (XAuthorizationPrivate));
}
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