pidgin/pidgin

Prevent spoofing of iq replies by verifying that the 'from' address
release-2.x.y
2014-01-12, Mark Doliner
93d4bff19574
Prevent spoofing of iq replies by verifying that the 'from' address
matches the 'to' address of the iq request.

This full extent of this problem was realized by Thijs Alkemade, while
investigating a problem reported to us by Fabian Yamaguchi and Christian
Wressnegger of the University of Goettingen)

This change was created by Thijs Alkemade, with small shuffling and
variable renaming by me.
/*
* Themes for libpurple
*
* Pidgin is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* 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 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include "internal.h"
#include "theme-manager.h"
#include "util.h"
/******************************************************************************
* Globals
*****************************************************************************/
static GHashTable *theme_table = NULL;
/*****************************************************************************
* GObject Stuff
****************************************************************************/
GType
purple_theme_manager_get_type(void)
{
static GType type = 0;
if (type == 0) {
static const GTypeInfo info = {
sizeof(PurpleThemeManagerClass),
NULL, /* base_init */
NULL, /* base_finalize */
NULL, /* class_init */
NULL, /* class_finalize */
NULL, /* class_data */
sizeof(PurpleThemeManager),
0, /* n_preallocs */
NULL, /* instance_init */
NULL, /* Value Table */
};
type = g_type_register_static(G_TYPE_OBJECT,
"PurpleThemeManager", &info, 0);
}
return type;
}
/******************************************************************************
* Helpers
*****************************************************************************/
/* makes a key of <type> + '/' + <name> */
static gchar *
purple_theme_manager_make_key(const gchar *name, const gchar *type)
{
g_return_val_if_fail(name && *name, NULL);
g_return_val_if_fail(type && *type, NULL);
return g_strconcat(type, "/", name, NULL);
}
/* returns TRUE if theme is of type "user_data" */
static gboolean
purple_theme_manager_is_theme_type(gchar *key,
gpointer value,
gchar *user_data)
{
return g_str_has_prefix(key, g_strconcat(user_data, "/", NULL));
}
static gboolean
purple_theme_manager_is_theme(gchar *key,
gpointer value,
gchar *user_data)
{
return PURPLE_IS_THEME(value);
}
static void
purple_theme_manager_function_wrapper(gchar *key,
gpointer value,
PTFunc user_data)
{
if (PURPLE_IS_THEME(value))
(* user_data)(value);
}
static void
purple_theme_manager_build_dir(const gchar *root)
{
gchar *purple_dir, *theme_dir;
const gchar *name = NULL, *type = NULL;
GDir *rdir, *tdir;
PurpleThemeLoader *loader;
rdir = g_dir_open(root, 0, NULL);
if (!rdir)
return;
/* Parses directory by root/name/purple/type */
while ((name = g_dir_read_name(rdir))) {
purple_dir = g_build_filename(root, name, "purple", NULL);
tdir = g_dir_open(purple_dir, 0, NULL);
if (!tdir) {
g_free(purple_dir);
continue;
}
while ((type = g_dir_read_name(tdir))) {
if ((loader = g_hash_table_lookup(theme_table, type))) {
PurpleTheme *theme = NULL;
theme_dir = g_build_filename(purple_dir, type, NULL);
theme = purple_theme_loader_build(loader, theme_dir);
g_free(theme_dir);
if (PURPLE_IS_THEME(theme))
purple_theme_manager_add_theme(theme);
}
}
g_dir_close(tdir);
g_free(purple_dir);
}
g_dir_close(rdir);
}
/*****************************************************************************
* Public API functions
*****************************************************************************/
void
purple_theme_manager_init(void)
{
theme_table = g_hash_table_new_full(g_str_hash,
g_str_equal, g_free, g_object_unref);
}
void
purple_theme_manager_refresh(void)
{
gchar *path = NULL;
const gchar *xdg = NULL;
gint i = 0;
g_hash_table_foreach_remove(theme_table,
(GHRFunc) purple_theme_manager_is_theme, NULL);
/* Add themes from ~/.purple */
path = g_build_filename(purple_user_dir(), "themes", NULL);
purple_theme_manager_build_dir(path);
g_free(path);
/* look for XDG_DATA_HOME. If we don't have it use ~/.local, and add it */
if ((xdg = g_getenv("XDG_DATA_HOME")) != NULL)
path = g_build_filename(xdg, "themes", NULL);
else
path = g_build_filename(purple_home_dir(), ".local", "themes", NULL);
purple_theme_manager_build_dir(path);
g_free(path);
/* now dig through XDG_DATA_DIRS and add those too */
xdg = g_getenv("XDG_DATA_DIRS");
if (xdg) {
gchar **xdg_dirs = g_strsplit(xdg, G_SEARCHPATH_SEPARATOR_S, 0);
for (i = 0; xdg_dirs[i]; i++) {
path = g_build_filename(xdg_dirs[i], "themes", NULL);
purple_theme_manager_build_dir(path);
g_free(path);
}
g_strfreev(xdg_dirs);
}
}
void
purple_theme_manager_uninit(void)
{
g_hash_table_destroy(theme_table);
}
void
purple_theme_manager_register_type(PurpleThemeLoader *loader)
{
gchar *type;
g_return_if_fail(PURPLE_IS_THEME_LOADER(loader));
type = g_strdup(purple_theme_loader_get_type_string(loader));
g_return_if_fail(type);
/* if something is already there do nothing */
if (!g_hash_table_lookup(theme_table, type))
g_hash_table_insert(theme_table, type, loader);
}
void
purple_theme_manager_unregister_type(PurpleThemeLoader *loader)
{
const gchar *type;
g_return_if_fail(PURPLE_IS_THEME_LOADER(loader));
type = purple_theme_loader_get_type_string(loader);
g_return_if_fail(type);
if (g_hash_table_lookup(theme_table, type) == loader)
{
g_hash_table_remove(theme_table, type);
g_hash_table_foreach_remove(theme_table,
(GHRFunc)purple_theme_manager_is_theme_type, (gpointer)type);
} /* only free if given registered loader */
}
PurpleTheme *
purple_theme_manager_find_theme(const gchar *name,
const gchar *type)
{
gchar *key;
PurpleTheme *theme;
key = purple_theme_manager_make_key(name, type);
g_return_val_if_fail(key, NULL);
theme = g_hash_table_lookup(theme_table, key);
g_free(key);
return theme;
}
void
purple_theme_manager_add_theme(PurpleTheme *theme)
{
gchar *key;
g_return_if_fail(PURPLE_IS_THEME(theme));
key = purple_theme_manager_make_key(purple_theme_get_name(theme),
purple_theme_get_type_string(theme));
g_return_if_fail(key);
/* if something is already there do nothing */
if (g_hash_table_lookup(theme_table, key) == NULL)
g_hash_table_insert(theme_table, key, theme);
}
void
purple_theme_manager_remove_theme(PurpleTheme *theme)
{
gchar *key;
g_return_if_fail(PURPLE_IS_THEME(theme));
key = purple_theme_manager_make_key(purple_theme_get_name(theme),
purple_theme_get_type_string(theme));
g_return_if_fail(key);
g_hash_table_remove(theme_table, key);
g_free(key);
}
void
purple_theme_manager_for_each_theme(PTFunc func)
{
g_return_if_fail(func);
g_hash_table_foreach(theme_table,
(GHFunc) purple_theme_manager_function_wrapper, func);
}
PurpleTheme *
purple_theme_manager_load_theme(const gchar *theme_dir, const gchar *type)
{
PurpleThemeLoader *loader;
g_return_val_if_fail(theme_dir != NULL && type != NULL, NULL);
loader = g_hash_table_lookup(theme_table, type);
g_return_val_if_fail(PURPLE_IS_THEME_LOADER(loader), NULL);
return purple_theme_loader_build(loader, theme_dir);
}