Desktop
/* $Id: smscrypt.c,v 1.18 2010/10/26 15:34:59 khorben Exp $ */
/* Copyright (c) 2010 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Phone */
/* 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, version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>. */
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <openssl/sha.h>
#include <gtk/gtk.h>
#include <System.h>
#include "Phone.h"
/* SMSCrypt */
/* private */
/* types */
typedef struct _SMSCrypt
{
/* internal */
unsigned char buf[20];
size_t len;
/* widgets */
GtkWidget * window;
GtkListStore * store;
GtkWidget * view;
} SMSCrypt;
/* prototypes */
static void _smscrypt_clear(PhonePlugin * plugin);
static gboolean _smscrypt_confirm(PhonePlugin * plugin, char const * message);
static int _smscrypt_init(PhonePlugin * plugin);
static int _smscrypt_destroy(PhonePlugin * plugin);
static int _smscrypt_event(PhonePlugin * plugin, PhoneEvent event, ...);
static int _smscrypt_secret(PhonePlugin * plugin, char const * number);
static void _smscrypt_settings(PhonePlugin * plugin);
/* public */
/* variables */
PhonePlugin plugin =
{
NULL,
"SMS encryption",
"application-certificate",
_smscrypt_init,
_smscrypt_destroy,
_smscrypt_event,
_smscrypt_settings,
NULL
};
/* private */
/* functions */
/* smscrypt_clear */
static void _smscrypt_clear(PhonePlugin * plugin)
{
SMSCrypt * smscrypt = plugin->priv;
memset(smscrypt->buf, 0, smscrypt->len);
}
/* smscrypt_confirm */
static gboolean _smscrypt_confirm(PhonePlugin * plugin, char const * message)
{
GtkWidget * dialog;
int res;
fprintf(stderr, "DEBUG: %s()\n", __func__);
dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_QUESTION,
GTK_BUTTONS_YES_NO, "%s",
#if GTK_CHECK_VERSION(2, 6, 0)
"Question");
gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog),
"%s",
#endif
message);
gtk_window_set_title(GTK_WINDOW(dialog), "Question");
res = gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
return (res == GTK_RESPONSE_YES) ? TRUE : FALSE;
}
/* smscrypt_init */
static void _init_foreach(char const * variable, char const * value,
void * priv);
static int _smscrypt_init(PhonePlugin * plugin)
{
SMSCrypt * smscrypt;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if((smscrypt = malloc(sizeof(*smscrypt))) == NULL)
return error_set_code(1, "%s", strerror(errno));
plugin->priv = smscrypt;
smscrypt->len = sizeof(smscrypt->buf);
smscrypt->window = NULL;
smscrypt->store = gtk_list_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
plugin->helper->config_foreach(plugin->helper->phone, "smscrypt",
_init_foreach, smscrypt);
return 0;
}
static void _init_foreach(char const * variable, char const * value,
void * priv)
{
SMSCrypt * smscrypt = priv;
GtkTreeIter iter;
gtk_list_store_append(smscrypt->store, &iter);
gtk_list_store_set(smscrypt->store, &iter, 0, variable, 1, value, -1);
}
/* smscrypt_destroy */
static int _smscrypt_destroy(PhonePlugin * plugin)
{
SMSCrypt * smscrypt = plugin->priv;
if(smscrypt->window != NULL)
gtk_widget_destroy(smscrypt->window);
free(smscrypt);
return 0;
}
/* smscrypt_event */
static int _smscrypt_event_sms_receiving(PhonePlugin * plugin,
char const * number, PhoneEncoding * encoding, char * buf,
size_t * len);
static int _smscrypt_event_sms_sending(PhonePlugin * plugin,
char const * number, PhoneEncoding * encoding, char * buf,
size_t * len);
static int _smscrypt_event(PhonePlugin * plugin, PhoneEvent event, ...)
{
int ret = 0;
va_list ap;
char const * number;
PhoneEncoding * encoding;
char ** buf;
size_t * len;
va_start(ap, event);
switch(event)
{
/* our deal */
case PHONE_EVENT_SMS_RECEIVING:
number = va_arg(ap, char const *);
encoding = va_arg(ap, PhoneEncoding *);
buf = va_arg(ap, char **);
len = va_arg(ap, size_t *);
ret = _smscrypt_event_sms_receiving(plugin, number,
encoding, *buf, len);
break;
case PHONE_EVENT_SMS_SENDING:
number = va_arg(ap, char const *);
encoding = va_arg(ap, PhoneEncoding *);
buf = va_arg(ap, char **);
len = va_arg(ap, size_t *);
ret = _smscrypt_event_sms_sending(plugin, number,
encoding, *buf, len);
break;
/* ignore the rest */
default:
break;
}
va_end(ap);
return ret;
}
static int _smscrypt_event_sms_receiving(PhonePlugin * plugin,
char const * number, PhoneEncoding * encoding, char * buf,
size_t * len)
{
SMSCrypt * smscrypt = plugin->priv;
size_t i;
size_t j = 0;
SHA_CTX sha1;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(%u, buf, %lu)\n", __func__, *encoding,
(unsigned long)*len);
#endif
if(*encoding != PHONE_ENCODING_DATA)
return 0; /* not for us */
if(_smscrypt_secret(plugin, number) != 0)
return 0; /* XXX warn */
for(i = 0; i < *len; i++)
{
buf[i] ^= smscrypt->buf[j];
smscrypt->buf[j++] ^= buf[i];
if(j != smscrypt->len)
continue;
SHA1_Init(&sha1);
SHA1_Update(&sha1, smscrypt->buf, smscrypt->len);
SHA1_Final(smscrypt->buf, &sha1);
j = 0;
}
*encoding = PHONE_ENCODING_UTF8;
_smscrypt_clear(plugin);
return 0;
}
static int _smscrypt_event_sms_sending(PhonePlugin * plugin,
char const * number, PhoneEncoding * encoding, char * buf,
size_t * len)
{
SMSCrypt * smscrypt = plugin->priv;
char const * confirm = "There is no secret defined for this number."
" The message will be sent unencrypted.\nContinue?";
size_t i;
size_t j = 0;
SHA_CTX sha1;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s(\"%s\", %u, buf, %lu)\n", __func__, number,
(unsigned)*encoding, (unsigned long)*len);
#endif
if(*encoding != PHONE_ENCODING_UTF8)
return 0; /* not for us */
if(_smscrypt_secret(plugin, number) != 0)
return (_smscrypt_confirm(plugin, confirm) == TRUE) ? 0 : 1;
*encoding = PHONE_ENCODING_DATA;
for(i = 0; i < *len; i++)
{
buf[i] ^= smscrypt->buf[j];
smscrypt->buf[j++] = buf[i];
if(j != smscrypt->len)
continue;
SHA1_Init(&sha1);
SHA1_Update(&sha1, smscrypt->buf, smscrypt->len);
SHA1_Final(smscrypt->buf, &sha1);
j = 0;
}
*encoding = PHONE_ENCODING_DATA;
_smscrypt_clear(plugin);
return 0;
}
/* smscrypt_secret */
static int _smscrypt_secret(PhonePlugin * plugin, char const * number)
{
SMSCrypt * smscrypt = plugin->priv;
char const * secret = NULL;
SHA_CTX sha1;
if(number != NULL)
secret = plugin->helper->config_get(plugin->helper->phone,
"smscrypt", number);
if(secret == NULL)
secret = plugin->helper->config_get(plugin->helper->phone,
"smscrypt", "secret");
if(secret == NULL)
return 1;
SHA1_Init(&sha1);
SHA1_Update(&sha1, (unsigned char const *)secret, strlen(secret));
SHA1_Final(smscrypt->buf, &sha1);
return 0;
}
/* smscrypt_settings */
static gboolean _on_settings_closex(gpointer data);
static void _on_settings_delete(gpointer data);
static void _on_settings_new(gpointer data);
static void _on_settings_number_edited(GtkCellRenderer * renderer, gchar * arg1,
gchar * arg2, gpointer data);
static void _on_settings_secret_edited(GtkCellRenderer * renderer, gchar * arg1,
gchar * arg2, gpointer data);
static void _smscrypt_settings(PhonePlugin * plugin)
{
SMSCrypt * smscrypt = plugin->priv;
GtkWidget * vbox;
GtkWidget * widget;
GtkToolItem * toolitem;
GtkCellRenderer * renderer;
GtkTreeViewColumn * column;
if(smscrypt->window != NULL)
{
gtk_window_present(GTK_WINDOW(smscrypt->window));
return;
}
smscrypt->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(smscrypt->window), 200, 300);
#if GTK_CHECK_VERSION(2, 6, 0)
/* XXX find something more appropriate */
gtk_window_set_icon_name(GTK_WINDOW(smscrypt->window), "smscrypt");
#endif
gtk_window_set_title(GTK_WINDOW(smscrypt->window), "SMS encryption");
g_signal_connect_swapped(G_OBJECT(smscrypt->window), "delete-event",
G_CALLBACK(_on_settings_closex), plugin);
vbox = gtk_vbox_new(FALSE, 0);
/* toolbar */
widget = gtk_toolbar_new();
toolitem = gtk_tool_button_new_from_stock(GTK_STOCK_NEW);
g_signal_connect_swapped(G_OBJECT(toolitem), "clicked", G_CALLBACK(
_on_settings_new), plugin);
gtk_toolbar_insert(GTK_TOOLBAR(widget), toolitem, -1);
toolitem = gtk_tool_button_new_from_stock(GTK_STOCK_DELETE);
g_signal_connect_swapped(G_OBJECT(toolitem), "clicked", G_CALLBACK(
_on_settings_delete), plugin);
gtk_toolbar_insert(GTK_TOOLBAR(widget), toolitem, -1);
gtk_box_pack_start(GTK_BOX(vbox), widget, FALSE, TRUE, 0);
/* view */
widget = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(widget),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
smscrypt->view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(
smscrypt->store));
gtk_tree_view_set_rules_hint(GTK_TREE_VIEW(smscrypt->view), TRUE);
renderer = gtk_cell_renderer_text_new();
g_object_set(G_OBJECT(renderer), "editable", TRUE, NULL);
g_signal_connect(G_OBJECT(renderer), "edited", G_CALLBACK(
_on_settings_number_edited), plugin);
column = gtk_tree_view_column_new_with_attributes("Number",
renderer, "text", 0, NULL);
gtk_tree_view_append_column(GTK_TREE_VIEW(smscrypt->view), column);
renderer = gtk_cell_renderer_text_new();
g_object_set(G_OBJECT(renderer), "editable", TRUE, NULL);
g_signal_connect(G_OBJECT(renderer), "edited", G_CALLBACK(
_on_settings_secret_edited), plugin);
column = gtk_tree_view_column_new_with_attributes("Secret",
renderer, "text", 1, NULL);
gtk_tree_view_append_column(GTK_TREE_VIEW(smscrypt->view), column);
gtk_container_add(GTK_CONTAINER(widget), smscrypt->view);
gtk_box_pack_start(GTK_BOX(vbox), widget, TRUE, TRUE, 0);
gtk_container_add(GTK_CONTAINER(smscrypt->window), vbox);
gtk_widget_show_all(smscrypt->window);
}
static gboolean _on_settings_closex(gpointer data)
{
PhonePlugin * plugin = data;
SMSCrypt * smscrypt = plugin->priv;
gtk_widget_hide(smscrypt->window);
return TRUE;
}
static void _on_settings_delete(gpointer data)
{
PhonePlugin * plugin = data;
SMSCrypt * smscrypt = plugin->priv;
GtkTreeSelection * treesel;
GtkTreeIter iter;
char * number = NULL;
if((treesel = gtk_tree_view_get_selection(GTK_TREE_VIEW(
smscrypt->view))) == NULL)
return;
if(gtk_tree_selection_get_selected(treesel, NULL, &iter) != TRUE)
return;
gtk_tree_model_get(GTK_TREE_MODEL(smscrypt->store), &iter, 0, &number,
-1);
if(number == NULL)
return;
plugin->helper->config_set(plugin->helper->phone, "smscrypt", number,
NULL);
gtk_list_store_remove(smscrypt->store, &iter);
g_free(number);
}
static void _on_settings_new(gpointer data)
{
PhonePlugin * plugin = data;
SMSCrypt * smscrypt = plugin->priv;
GtkTreeIter iter;
gtk_list_store_append(smscrypt->store, &iter);
gtk_list_store_set(smscrypt->store, &iter, 0, "number", -1);
}
static void _on_settings_number_edited(GtkCellRenderer * renderer, gchar * arg1,
gchar * arg2, gpointer data)
{
PhonePlugin * plugin = data;
SMSCrypt * smscrypt = plugin->priv;
GtkTreeModel * model = GTK_TREE_MODEL(smscrypt->store);
GtkTreeIter iter;
char * number = NULL;
char const * secret;
if(gtk_tree_model_get_iter_from_string(model, &iter, arg1) == TRUE)
gtk_tree_model_get(model, &iter, 0, &number, -1);
if(number == NULL)
return;
/* FIXME check that there are no duplicates */
secret = plugin->helper->config_get(plugin->helper->phone, "smscrypt",
number);
if(plugin->helper->config_set(plugin->helper->phone, "smscrypt", arg2,
secret) == 0
&& plugin->helper->config_set(plugin->helper->phone,
"smscrypt", number, NULL) == 0)
gtk_list_store_set(smscrypt->store, &iter, 0, arg2, -1);
g_free(number);
}
static void _on_settings_secret_edited(GtkCellRenderer * renderer, gchar * arg1,
gchar * arg2, gpointer data)
{
PhonePlugin * plugin = data;
SMSCrypt * smscrypt = plugin->priv;
GtkTreeModel * model = GTK_TREE_MODEL(smscrypt->store);
GtkTreeIter iter;
char * number = NULL;
if(gtk_tree_model_get_iter_from_string(model, &iter, arg1) == TRUE)
gtk_tree_model_get(model, &iter, 0, &number, -1);
if(number == NULL)
return;
if(plugin->helper->config_set(plugin->helper->phone, "smscrypt", number,
arg2) == 0)
gtk_list_store_set(smscrypt->store, &iter, 1, arg2, -1);
g_free(number);
}