gtk-dialog.c 102 KB
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/*
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 *  Off-the-Record Messaging plugin for pidgin
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 *  Copyright (C) 2004-2012  Ian Goldberg, Rob Smits,
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 *                           Chris Alexander, Willy Lew,
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 *                           Lisa Du, Nikita Borisov
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 *                           <otr@cypherpunks.ca>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of version 2 of the GNU General Public License as
 *  published by the Free Software Foundation.
 *
 *  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
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 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */

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/* config.h */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

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/* system headers */
#include <stdio.h>
#include <stdlib.h>
#include <gtk/gtk.h>

/* gcrypt headers */
#include <gcrypt.h>

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/* purple headers */
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#include "version.h"
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#include "pidginstock.h"
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#include "plugin.h"
#include "notify.h"
#include "gtkconv.h"
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#include "gtkutils.h"
#include "gtkimhtml.h"
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#include "util.h"
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#include "core.h"
#include "gtkmenutray.h"
#include "tooltipmenu.h"
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#ifdef ENABLE_NLS
/* internationalisation headers */
#include <glib/gi18n-lib.h>
#endif

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/* libotr headers */
#include <libotr/dh.h>
#include <libotr/privkey.h>
#include <libotr/proto.h>
#include <libotr/message.h>
#include <libotr/userstate.h>
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#include <libotr/instag.h>
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/* purple-otr headers */
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#include "otr-plugin.h"
#include "dialogs.h"
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#include "gtk-dialog.h"
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#include "ui.h"
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#include "otr-icons.h"

static GHashTable * otr_win_menus = 0;
static GHashTable * otr_win_status = 0;

static int img_id_not_private = 0;
static int img_id_unverified = 0;
static int img_id_private = 0;
static int img_id_finished = 0;
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typedef struct {
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    ConnContext *context;       /* The context used to fire library code */
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    GtkEntry* question_entry;   /* The text entry field containing the user
				 * question */
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    GtkEntry *entry;	        /* The text entry field containing the secret */
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    int smp_type;               /* Whether the SMP type is based on question
				 * challenge (0) or shared secret (1) */
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    gboolean responder;	        /* Whether or not this is the first side to give
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				 * their secret */
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} SmpResponsePair;

/* Information used by the plugin that is specific to both the
 * application and connection. */
typedef struct dialog_context_data {
    GtkWidget       *smp_secret_dialog;
    SmpResponsePair *smp_secret_smppair;
    GtkWidget       *smp_progress_dialog;
    GtkWidget       *smp_progress_bar;
    GtkWidget       *smp_progress_label;
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    otrl_instag_t   their_instance;
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} SMPData;

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typedef struct {
    SmpResponsePair *smppair;
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    GtkEntry        *one_way_entry;
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    GtkEntry        *two_way_entry;
    GtkWidget       *notebook;
} AuthSignalData;

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typedef struct {
    enum {
	convctx_none,
	convctx_conv,
	convctx_ctx
    } convctx_type;
    PurpleConversation *conv;
    ConnContext *context;
} ConvOrContext;

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static gint get_new_instance_index(PurpleConversation *conv) {
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    gint * max_index = (gint *)
	    purple_conversation_get_data(conv, "otr-max_idx");
    *max_index = (*max_index) + 1;
    return *max_index;
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}

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static gint get_context_instance_to_index(PurpleConversation *conv,
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	ConnContext *context) {
    GHashTable * conv_to_idx_map =
	    purple_conversation_get_data(conv, "otr-conv_to_idx");
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    gpointer index = NULL;
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    if (!g_hash_table_lookup_extended(conv_to_idx_map, context, NULL, &index)) {
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	index = g_malloc(sizeof(gint));
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	*(gint *)index = get_new_instance_index(conv);
	g_hash_table_replace(conv_to_idx_map, context, index);
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    }

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    return *(gint *)index;
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}

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static void close_progress_window(SMPData *smp_data)
{
    if (smp_data->smp_progress_dialog) {
	gtk_dialog_response(GTK_DIALOG(smp_data->smp_progress_dialog),
		GTK_RESPONSE_REJECT);
    }
    smp_data->smp_progress_dialog = NULL;
    smp_data->smp_progress_bar = NULL;
    smp_data->smp_progress_label = NULL;
}

static void otrg_gtk_dialog_free_smp_data(PurpleConversation *conv)
{
    SMPData *smp_data = purple_conversation_get_data(conv, "otr-smpdata");
    if (!smp_data) return;

    if (smp_data->smp_secret_dialog) {
	gtk_dialog_response(GTK_DIALOG(smp_data->smp_secret_dialog),
		GTK_RESPONSE_REJECT);
    }
    smp_data->smp_secret_dialog = NULL;
    smp_data->smp_secret_smppair = NULL;

    close_progress_window(smp_data);

    free(smp_data);

    g_hash_table_remove(conv->data, "otr-smpdata");
}

static void otrg_gtk_dialog_add_smp_data(PurpleConversation *conv)
{
    SMPData *smp_data = malloc(sizeof(SMPData));
    smp_data->smp_secret_dialog = NULL;
    smp_data->smp_secret_smppair = NULL;
    smp_data->smp_progress_dialog = NULL;
    smp_data->smp_progress_bar = NULL;
    smp_data->smp_progress_label = NULL;
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    /* Chosen as initialized value since libotr should never allow
     * this as a "their_instance" value */
    smp_data->their_instance = OTRL_INSTAG_BEST;
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    purple_conversation_set_data(conv, "otr-smpdata", smp_data);
}

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static GtkWidget *otr_icon(GtkWidget *image, TrustLevel level,
	gboolean sensitivity)
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{
    GdkPixbuf *pixbuf = NULL;
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    const guint8 *data = NULL;
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    switch(level) {
	case TRUST_NOT_PRIVATE:
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	    data = not_private_pixbuf;
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	    break;
	case TRUST_UNVERIFIED:
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	    data = unverified_pixbuf;
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	    break;
	case TRUST_PRIVATE:
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	    data = private_pixbuf;
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	    break;
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	case TRUST_FINISHED:
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	    data = finished_pixbuf;
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	    break;
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    }

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    pixbuf = gdk_pixbuf_new_from_inline(-1, data, FALSE, NULL);
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    if (image) {
	gtk_image_set_from_pixbuf(GTK_IMAGE(image), pixbuf);
    } else {
	image = gtk_image_new_from_pixbuf(pixbuf);
    }
    gdk_pixbuf_unref(pixbuf);

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    gtk_widget_set_sensitive (image, sensitivity);

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    return image;
}

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static void message_response_cb(GtkDialog *dialog, gint id, GtkWidget *widget)
{
    gtk_widget_destroy(GTK_WIDGET(widget));
}

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/* Forward declarations for the benefit of smp_message_response_cb/redraw
 * authvbox */
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static void verify_fingerprint(GtkWindow *parent, Fingerprint *fprint);
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static void add_vrfy_fingerprint(GtkWidget *vbox, void *data);
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static struct vrfy_fingerprint_data* vrfy_fingerprint_data_new(
	Fingerprint *fprint);
static void vrfy_fingerprint_destroyed(GtkWidget *w,
	struct vrfy_fingerprint_data *vfd);
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static void conversation_switched ( PurpleConversation *conv, void * data );

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static GtkWidget *create_smp_progress_dialog(GtkWindow *parent,
	ConnContext *context);

/* Called when a button is pressed on the "progress bar" smp dialog */
static void smp_progress_response_cb(GtkDialog *dialog, gint response,
	ConnContext *context)
{
    PurpleConversation *conv = otrg_plugin_context_to_conv(context, 0);
    SMPData *smp_data = NULL;
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    if (conv) {
	gdouble frac;

	smp_data = purple_conversation_get_data(conv, "otr-smpdata");
	frac = gtk_progress_bar_get_fraction(
		GTK_PROGRESS_BAR(smp_data->smp_progress_bar));

	if (frac != 0.0 && frac != 1.0 && response == GTK_RESPONSE_REJECT) {
	    otrg_plugin_abort_smp(context);
	}
    }
    /* In all cases, destroy the current window */
    gtk_widget_destroy(GTK_WIDGET(dialog));

    /* Clean up variables pointing to the destroyed objects */

    if (smp_data) {
	smp_data->smp_progress_bar = NULL;
	smp_data->smp_progress_label = NULL;
	smp_data->smp_progress_dialog = NULL;
    }
}

/* Called when a button is pressed on the "enter the secret" smp dialog
 * The data passed contains a pointer to the text entry field containing
 * the entered secret as well as the current context.
 */
static void smp_secret_response_cb(GtkDialog *dialog, gint response,
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	AuthSignalData *auth_opt_data)
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{
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    ConnContext* context;
    PurpleConversation *conv;
    SMPData *smp_data;
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    SmpResponsePair *smppair;
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    if (!auth_opt_data) return;
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    smppair = auth_opt_data->smppair;
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    if (!smppair) return;

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    context = smppair->context;
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    if (response == GTK_RESPONSE_ACCEPT && smppair->entry) {
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	GtkEntry* entry = smppair->entry;
	char *secret;
	size_t secret_len;

	GtkEntry* question_entry = smppair->question_entry;

	const char *user_question = NULL;


	if (context == NULL || context->msgstate != OTRL_MSGSTATE_ENCRYPTED) {
	    return;
	}

	secret = g_strdup(gtk_entry_get_text(entry));
	secret_len = strlen(secret);

	if (smppair->responder) {
	    otrg_plugin_continue_smp(context, (const unsigned char *)secret,
		    secret_len);

	} else {

	    if (smppair->smp_type == 0) {
		if (!question_entry) {
		    return;
		}

		user_question = gtk_entry_get_text(question_entry);

		if (user_question == NULL || strlen(user_question) == 0) {
		    return;
		}
	    }

	    /* pass user question here */
	    otrg_plugin_start_smp(context, user_question,
		    (const unsigned char *)secret, secret_len);

	}

	g_free(secret);

	/* launch progress bar window */
	create_smp_progress_dialog(GTK_WINDOW(dialog), context);
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    } else if (response == GTK_RESPONSE_HELP) {
	char *helpurl = g_strdup_printf("%s%s&context=%s",
		AUTHENTICATE_HELPURL, _("?lang=en"),
		auth_opt_data->smppair->smp_type == 0 ?
		    ( /* Question and Answer */
		      auth_opt_data->smppair->responder ?
		      "answer" : "question" ) :
		auth_opt_data->smppair->smp_type == 1 ?
		    ( /* Shared secret */
		      auth_opt_data->smppair->responder ?
		      "secretresp" : "secret" ) :
		    /* Fingerprint */
		    "fingerprint"
		);
	purple_notify_uri(otrg_plugin_handle, helpurl);
	g_free(helpurl);

	/* Don't destroy the window */
	return;
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    } else {
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	otrg_plugin_abort_smp(context);
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    }
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    /* In all cases except HELP, destroy the current window */
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    gtk_widget_destroy(GTK_WIDGET(dialog));
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    /* Clean up references to this window */
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    conv = otrg_plugin_context_to_conv(smppair->context, 0);
    smp_data = purple_conversation_get_data(conv, "otr-smpdata");
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    if (smp_data) {
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	smp_data->smp_secret_dialog = NULL;
	smp_data->smp_secret_smppair = NULL;
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    }

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    /* Free memory */
    free(auth_opt_data);
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    free(smppair);
}

static void close_smp_window(PurpleConversation *conv)
{
    SMPData *smp_data = purple_conversation_get_data(conv, "otr-smpdata");
    if (smp_data && smp_data->smp_secret_dialog) {
	gtk_dialog_response(GTK_DIALOG(smp_data->smp_secret_dialog),
		GTK_RESPONSE_REJECT);
    }
}

static GtkWidget *create_dialog(GtkWindow *parent,
	PurpleNotifyMsgType type, const char *title,
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	const char *primary, const char *secondary, int sensitive,
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	GtkWidget **labelp, void (*add_custom)(GtkWidget *vbox, void *data),
	void *add_custom_data)
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{
    GtkWidget *dialog;
    GtkWidget *hbox;
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    GtkWidget *vbox;
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    GtkWidget *label;
    GtkWidget *img = NULL;
    char *label_text;
    const char *icon_name = NULL;

    switch (type) {
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	case PURPLE_NOTIFY_MSG_ERROR:
	    icon_name = PIDGIN_STOCK_DIALOG_ERROR;
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	    break;

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	case PURPLE_NOTIFY_MSG_WARNING:
	    icon_name = PIDGIN_STOCK_DIALOG_WARNING;
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	    break;

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	case PURPLE_NOTIFY_MSG_INFO:
	    icon_name = PIDGIN_STOCK_DIALOG_INFO;
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	    break;

	default:
	    icon_name = NULL;
	    break;
    }

    if (icon_name != NULL) {
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	img = gtk_image_new_from_stock(icon_name,
		gtk_icon_size_from_name(PIDGIN_ICON_SIZE_TANGO_HUGE));
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	gtk_misc_set_alignment(GTK_MISC(img), 0, 0);
    }

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    dialog = gtk_dialog_new_with_buttons(
	    title ? title : PIDGIN_ALERT_TITLE, parent, 0,
	    GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, NULL);
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    gtk_window_set_focus_on_map(GTK_WINDOW(dialog), FALSE);
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    gtk_window_set_role(GTK_WINDOW(dialog), "notify_dialog");

    g_signal_connect(G_OBJECT(dialog), "response",
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	    G_CALLBACK(message_response_cb), dialog);
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    gtk_dialog_set_response_sensitive(GTK_DIALOG(dialog), GTK_RESPONSE_ACCEPT,
	    sensitive);
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    gtk_container_set_border_width(GTK_CONTAINER(dialog), 6);
    gtk_window_set_resizable(GTK_WINDOW(dialog), FALSE);
    gtk_dialog_set_has_separator(GTK_DIALOG(dialog), FALSE);
    gtk_box_set_spacing(GTK_BOX(GTK_DIALOG(dialog)->vbox), 12);
    gtk_container_set_border_width(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), 6);

    hbox = gtk_hbox_new(FALSE, 12);
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    vbox = gtk_vbox_new(FALSE, 0);
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    gtk_container_add(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), hbox);

    if (img != NULL) {
	gtk_box_pack_start(GTK_BOX(hbox), img, FALSE, FALSE, 0);
    }

    label_text = g_strdup_printf(
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	    "<span weight=\"bold\" size=\"larger\">%s</span>%s%s",
	    (primary ? primary : ""),
	    (primary ? "\n\n" : ""),
	    (secondary ? secondary : ""));
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    label = gtk_label_new(NULL);

    gtk_label_set_markup(GTK_LABEL(label), label_text);
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    gtk_label_set_selectable(GTK_LABEL(label), 1);
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    g_free(label_text);
    gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
    gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
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    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
    if (add_custom) {
	add_custom(vbox, add_custom_data);
    }
    gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 0);
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    gtk_widget_show_all(dialog);

    if (labelp) *labelp = label;
    return dialog;
}

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static void add_to_vbox_init_one_way_auth(GtkWidget *vbox,
	ConnContext *context, AuthSignalData *auth_opt_data, char *question) {
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    GtkWidget *question_entry;
    GtkWidget *entry;
    GtkWidget *label;
    GtkWidget *label2;
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    char *label_text;

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    SmpResponsePair* smppair = auth_opt_data->smppair;
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    if (smppair->responder) {
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	label_text = g_strdup_printf("<small><i>\n%s\n</i></small>",
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	    _("Your buddy is attempting to determine if he or she is really "
		"talking to you, or if it's someone pretending to be you.  "
		"Your buddy has asked a question, indicated below.  "
		"To authenticate to your buddy, enter the answer and "
		"click OK."));
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    } else {
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	label_text = g_strdup_printf("<small><i>\n%s\n</i></small>",
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	    _("To authenticate using a question, pick a question whose "
	    "answer is known only to you and your buddy.  Enter this "
	    "question and this answer, then wait for your buddy to "
	    "enter the answer too.  If the answers "
	    "don't match, then you may be talking to an imposter."));
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    }
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    label = gtk_label_new(NULL);
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    gtk_label_set_markup(GTK_LABEL(label), label_text);
    gtk_label_set_selectable(GTK_LABEL(label), FALSE);
    g_free(label_text);
    gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
    gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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    if (smppair->responder) {
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	label_text = g_strdup_printf(_("This is the question asked by "
		"your buddy:"));
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    } else {
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	label_text = g_strdup_printf(_("Enter question here:"));
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    }
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    label = gtk_label_new(label_text);
    gtk_label_set_selectable(GTK_LABEL(label), FALSE);
    g_free(label_text);
    gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
    gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);

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    if (smppair->responder && question) {
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	label_text = g_markup_printf_escaped("<span background=\"white\" "
		"foreground=\"black\" weight=\"bold\">%s</span>", question);
	label = gtk_label_new(NULL);
	gtk_label_set_markup (GTK_LABEL(label), label_text);
	gtk_label_set_selectable(GTK_LABEL(label), FALSE);
	g_free(label_text);
	gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
	gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
	gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
	smppair->question_entry = NULL;
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    } else {
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	/* Create the text view where the user enters their question */
	question_entry = gtk_entry_new ();
	smppair->question_entry = GTK_ENTRY(question_entry);
	gtk_box_pack_start(GTK_BOX(vbox), question_entry, FALSE, FALSE, 0);
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    }
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    if (context->active_fingerprint->trust &&
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	context->active_fingerprint->trust[0] && !(smppair->responder)) {
	label2 = gtk_label_new(_("This buddy is already authenticated."));
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    } else {
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	label2 = NULL;
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    }
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    /* Leave a blank line */
    gtk_box_pack_start(GTK_BOX(vbox), gtk_label_new(NULL), FALSE,
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	    FALSE, 0);
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    label_text = g_strdup_printf(_("Enter secret answer here "
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	    "(case sensitive):"));
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    label = gtk_label_new(NULL);
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    gtk_label_set_markup(GTK_LABEL(label), label_text);
    gtk_label_set_selectable(GTK_LABEL(label), FALSE);
    g_free(label_text);
    gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
    gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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    /* Create the text view where the user enters their secret */
    entry = gtk_entry_new();
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    gtk_entry_set_text(GTK_ENTRY(entry), "");
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    auth_opt_data->one_way_entry = GTK_ENTRY(entry);
    gtk_entry_set_activates_default(GTK_ENTRY(entry), smppair->responder);
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    gtk_box_pack_start(GTK_BOX(vbox), entry, FALSE, FALSE, 0);
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    /* Leave a blank line */
    gtk_box_pack_start(GTK_BOX(vbox), gtk_label_new(NULL), FALSE,
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	    FALSE, 0);

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    if (label2) {
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	gtk_box_pack_start(GTK_BOX(vbox), label2, FALSE, FALSE, 0);
	gtk_box_pack_start(GTK_BOX(vbox), gtk_label_new(NULL), FALSE,
		FALSE, 0);
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    }
}
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static void add_to_vbox_init_two_way_auth(GtkWidget *vbox,
	ConnContext *context, AuthSignalData *auth_opt_data) {
    GtkWidget *entry;
    GtkWidget *label;
    GtkWidget *label2;
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    char *label_text;

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    label_text = g_strdup_printf("<small><i>\n%s\n</i></small>",
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	_("To authenticate, pick a secret known "
	    "only to you and your buddy.  Enter this secret, then "
	    "wait for your buddy to enter it too.  If the secrets "
	    "don't match, then you may be talking to an imposter."));
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    label = gtk_label_new(NULL);
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    gtk_label_set_markup(GTK_LABEL(label), label_text);
    gtk_label_set_selectable(GTK_LABEL(label), FALSE);
    g_free(label_text);
    gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
    gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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    label_text = g_strdup_printf(_("Enter secret here:"));
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    label = gtk_label_new(label_text);
    gtk_label_set_selectable(GTK_LABEL(label), FALSE);
    g_free(label_text);
    gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
    gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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    /* Create the text view where the user enters their secret */
    entry = gtk_entry_new();
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    gtk_entry_set_text(GTK_ENTRY(entry), "");
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    gtk_entry_set_activates_default(GTK_ENTRY(entry), TRUE);
    auth_opt_data->two_way_entry = GTK_ENTRY(entry);

    if (context->active_fingerprint->trust &&
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	context->active_fingerprint->trust[0]) {
	label2 = gtk_label_new(_("This buddy is already authenticated."));
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    } else {
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	label2 = NULL;
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    }

    gtk_box_pack_start(GTK_BOX(vbox), entry, FALSE, FALSE, 0);
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    /* Leave a blank line */
    gtk_box_pack_start(GTK_BOX(vbox), gtk_label_new(NULL), FALSE,
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	FALSE, 0);

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    if (label2) {
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	gtk_box_pack_start(GTK_BOX(vbox), label2, FALSE, FALSE, 0);
	gtk_box_pack_start(GTK_BOX(vbox), gtk_label_new(NULL), FALSE,
		FALSE, 0);
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    }
}

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static void add_to_vbox_verify_fingerprint(GtkWidget *vbox,
	ConnContext *context, SmpResponsePair* smppair) {
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    char our_hash[OTRL_PRIVKEY_FPRINT_HUMAN_LEN],
	    their_hash[OTRL_PRIVKEY_FPRINT_HUMAN_LEN];
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    GtkWidget *label;
    char *label_text;
    struct vrfy_fingerprint_data *vfd;
    PurplePlugin *p;
    char *proto_name;
    Fingerprint *fprint = context->active_fingerprint;

    if (fprint == NULL) return;
    if (fprint->fingerprint == NULL) return;

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    label_text = g_strdup_printf("<small><i>\n%s %s\n</i></small>",
	    _("To verify the fingerprint, contact your buddy via some "
	    "<i>other</i> authenticated channel, such as the telephone "
	    "or GPG-signed email.  Each of you should tell your fingerprint "
	    "to the other."),
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	    _("If everything matches up, you should chose <b>I have</b> "
	    "in the menu below."));
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    label = gtk_label_new(NULL);
    gtk_label_set_markup(GTK_LABEL(label), label_text);
    gtk_label_set_selectable(GTK_LABEL(label), FALSE);
    g_free(label_text);
    gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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    vfd = vrfy_fingerprint_data_new(fprint);

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    strncpy(our_hash, _("[none]"), 44);
    our_hash[44] = '\0';
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    otrl_privkey_fingerprint(otrg_plugin_userstate, our_hash,
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	    context->accountname, context->protocol);
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    otrl_privkey_hash_to_human(their_hash, fprint->fingerprint);

    p = purple_find_prpl(context->protocol);
    proto_name = (p && p->info->name) ? p->info->name : _("Unknown");
    label_text = g_strdup_printf(_("Fingerprint for you, %s (%s):\n%s\n\n"
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	    "Purported fingerprint for %s:\n%s\n"), context->accountname,
	    proto_name, our_hash, context->username, their_hash);

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    label = gtk_label_new(NULL);
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    gtk_label_set_markup(GTK_LABEL(label), label_text);
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    /* Make the label containing the fingerprints selectable, but
     * not auto-selected. */
    gtk_label_set_selectable(GTK_LABEL(label), TRUE);
    g_object_set(label, "can-focus", FALSE, NULL);

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    g_free(label_text);
    gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
    gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);
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    add_vrfy_fingerprint(vbox, vfd);
    g_signal_connect(G_OBJECT(vbox), "destroy",
	    G_CALLBACK(vrfy_fingerprint_destroyed), vfd);
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}

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static void redraw_auth_vbox(GtkComboBox *combo, void *data) {
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    AuthSignalData *auth_data = (AuthSignalData*) data;

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    GtkWidget *notebook = auth_data ? auth_data->notebook : NULL;

    int selected;
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    if (auth_data == NULL) return;
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    selected = gtk_combo_box_get_active(combo);
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    if (selected == 0) {
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	gtk_notebook_set_current_page (GTK_NOTEBOOK(notebook), 0);
	auth_data->smppair->entry = auth_data->one_way_entry;
	auth_data->smppair->smp_type = 0;
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    } else if (selected == 1) {
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	gtk_notebook_set_current_page (GTK_NOTEBOOK(notebook), 1);
	auth_data->smppair->entry = auth_data->two_way_entry;
	auth_data->smppair->smp_type = 1;
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    } else if (selected == 2) {
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	auth_data->smppair->entry = NULL;
	gtk_notebook_set_current_page (GTK_NOTEBOOK(notebook), 2);
	auth_data->smppair->smp_type = -1;
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    }
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}

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static void add_other_authentication_options(GtkWidget *vbox,
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	GtkWidget *notebook, ConnContext *context, AuthSignalData *data) {
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    GtkWidget *label;
    GtkWidget *combo;
    char *labeltext;

    labeltext = g_strdup_printf("\n%s",
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	    _("How would you like to authenticate your buddy?"));
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    label = gtk_label_new(labeltext);
    g_free(labeltext);
    gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.0);
    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);

    combo = gtk_combo_box_new_text();

    gtk_combo_box_append_text(GTK_COMBO_BOX(combo),
	    _("Question and answer"));

    gtk_combo_box_append_text(GTK_COMBO_BOX(combo),
	    _("Shared secret"));

    gtk_combo_box_append_text(GTK_COMBO_BOX(combo),
	    _("Manual fingerprint verification"));

    gtk_combo_box_set_active(GTK_COMBO_BOX(combo), 0);
    gtk_box_pack_start(GTK_BOX(vbox), combo, FALSE, FALSE, 0);

    data->notebook = notebook;
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    g_signal_connect (combo, "changed",
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	    G_CALLBACK (redraw_auth_vbox), data);
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}


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static GtkWidget *create_smp_dialog(const char *title, const char *primary,
	ConnContext *context, gboolean responder, char *question)
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{
    GtkWidget *dialog;

    PurpleConversation *conv = otrg_plugin_context_to_conv(context, 1);
    SMPData *smp_data = purple_conversation_get_data(conv, "otr-smpdata");

    close_progress_window(smp_data);
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    /* If you start SMP authentication on a different context, it
     * will kill any existing SMP */
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    if (smp_data->their_instance != context->their_instance) {
	otrg_gtk_dialog_free_smp_data(conv);
	otrg_gtk_dialog_add_smp_data(conv);
    }

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    if (!(smp_data->smp_secret_dialog)) {
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	GtkWidget *hbox;
	GtkWidget *vbox;
	GtkWidget *auth_vbox;
	GtkWidget *label;
	GtkWidget *img = NULL;
	char *label_text;
	const char *icon_name = NULL;
	SmpResponsePair* smppair;
	GtkWidget *notebook;
	AuthSignalData *auth_opt_data;

	smp_data->their_instance = context->their_instance;
	icon_name = PIDGIN_STOCK_DIALOG_INFO;
	img = gtk_image_new_from_stock(icon_name,
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		gtk_icon_size_from_name(PIDGIN_ICON_SIZE_TANGO_HUGE));
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	gtk_misc_set_alignment(GTK_MISC(img), 0, 0);

	dialog = gtk_dialog_new_with_buttons(title ? title :
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		PIDGIN_ALERT_TITLE, NULL, 0,
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		 GTK_STOCK_HELP, GTK_RESPONSE_HELP,
		 GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT,
		 _("_Authenticate"), GTK_RESPONSE_ACCEPT, NULL);
	gtk_dialog_set_default_response(GTK_DIALOG(dialog),
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		GTK_RESPONSE_ACCEPT);
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	auth_vbox = gtk_vbox_new(FALSE, 0);
	hbox = gtk_hbox_new(FALSE, 15);
	vbox = gtk_vbox_new(FALSE, 0);

	smppair = malloc(sizeof(SmpResponsePair));
	smppair->responder = responder;
	smppair->context = context;


	notebook = gtk_notebook_new();
	auth_opt_data = malloc(sizeof(AuthSignalData));
	auth_opt_data->smppair = smppair;

	gtk_window_set_focus_on_map(GTK_WINDOW(dialog), !responder);
	gtk_window_set_role(GTK_WINDOW(dialog), "notify_dialog");

	gtk_container_set_border_width(GTK_CONTAINER(dialog), 6);
	gtk_window_set_resizable(GTK_WINDOW(dialog), FALSE);
	gtk_dialog_set_has_separator(GTK_DIALOG(dialog), FALSE);
	gtk_box_set_spacing(GTK_BOX(GTK_DIALOG(dialog)->vbox), 12);
	gtk_container_set_border_width(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox),
		6);

	gtk_container_add(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), hbox);

	gtk_box_pack_start(GTK_BOX(hbox), img, FALSE, FALSE, 0);

	label_text = g_strdup_printf(
		"<span weight=\"bold\" size=\"larger\">%s</span>\n\n%s",
		(primary ? primary : ""),
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		_("Authenticating a buddy helps ensure that the person "
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		"you are talking to is who he or she claims to be."));

	label = gtk_label_new(NULL);

	gtk_label_set_markup(GTK_LABEL(label), label_text);
	gtk_label_set_selectable(GTK_LABEL(label), FALSE);
	g_free(label_text);
	gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
	gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
	gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);

	if (!responder) {
	    add_other_authentication_options(vbox, notebook, context,
		    auth_opt_data);
	}

	g_signal_connect(G_OBJECT(dialog), "response",
		G_CALLBACK(smp_secret_response_cb),
		auth_opt_data);

	if (!responder || (responder && question != NULL)) {
	    GtkWidget *one_way_vbox = gtk_vbox_new(FALSE, 0);
	    add_to_vbox_init_one_way_auth(one_way_vbox, context,
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		    auth_opt_data, question);
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	    gtk_notebook_append_page(GTK_NOTEBOOK(notebook), one_way_vbox,
		    gtk_label_new("0"));
	    smppair->entry = auth_opt_data->one_way_entry;
	    smppair->smp_type = 0;
	}

	if (!responder || (responder && question == NULL)) {
	    GtkWidget *two_way_vbox = gtk_vbox_new(FALSE, 0);
	    add_to_vbox_init_two_way_auth(two_way_vbox, context, auth_opt_data);
	    gtk_notebook_append_page(GTK_NOTEBOOK(notebook), two_way_vbox,
		    gtk_label_new("1"));

	    if (responder && question == NULL) {
		smppair->entry = auth_opt_data->two_way_entry;
		smppair->smp_type = 1;
	    }
	}

	if (!responder) {
	    GtkWidget *fingerprint_vbox = gtk_vbox_new(FALSE, 0);
	    add_to_vbox_verify_fingerprint(fingerprint_vbox, context, smppair);
	    gtk_notebook_append_page(GTK_NOTEBOOK(notebook), fingerprint_vbox,
		    gtk_label_new("2"));
	}

	gtk_notebook_set_show_tabs (GTK_NOTEBOOK(notebook), FALSE);

	gtk_notebook_set_show_border (GTK_NOTEBOOK(notebook), FALSE);
	gtk_box_pack_start(GTK_BOX(auth_vbox), notebook, FALSE, FALSE, 0);
	gtk_widget_show(notebook);


	gtk_box_pack_start(GTK_BOX(vbox), auth_vbox, FALSE, FALSE, 0);

	gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 0);

	gtk_widget_show_all(dialog);

	gtk_notebook_set_current_page (GTK_NOTEBOOK(notebook), 0);
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	if (!responder) {
	    gtk_window_set_focus(GTK_WINDOW(dialog),
		    GTK_WIDGET(smppair->question_entry));
	} else {
	    gtk_window_set_focus(GTK_WINDOW(dialog),
		    GTK_WIDGET(smppair->entry));
	}
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	smp_data->smp_secret_dialog = dialog;
	smp_data->smp_secret_smppair = smppair;

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    } else {
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	/* Set the responder field to TRUE if we were passed that value,
	 * even if the window was already up. */
	if (responder) {
	    smp_data->smp_secret_smppair->responder = responder;
	}
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    }

    return smp_data->smp_secret_dialog;
}

static GtkWidget *create_smp_progress_dialog(GtkWindow *parent,
	ConnContext *context)
{
    GtkWidget *dialog;
    GtkWidget *hbox;
    GtkWidget *vbox;
    GtkWidget *label;
    GtkWidget *proglabel;
    GtkWidget *bar;
    GtkWidget *img = NULL;
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    char *label_text, *label_pat;
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    const char *icon_name = NULL;
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    PurpleConversation *conv;
    SMPData *smp_data;
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    icon_name = PIDGIN_STOCK_DIALOG_INFO;
    img = gtk_image_new_from_stock(icon_name,
	    gtk_icon_size_from_name(PIDGIN_ICON_SIZE_TANGO_HUGE));
    gtk_misc_set_alignment(GTK_MISC(img), 0, 0);

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    dialog = gtk_dialog_new_with_buttons(
	    context->smstate->received_question ?
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	    /* Translators: you are asked to authenticate yourself */
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	    _("Authenticating to Buddy") :
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	    /* Translators: you asked your buddy to authenticate him/herself */
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	    _("Authenticating Buddy"),
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	    parent, 0, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT,
	    GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, NULL);
    gtk_dialog_set_default_response(GTK_DIALOG(dialog),
	    GTK_RESPONSE_ACCEPT);
    gtk_dialog_set_response_sensitive(GTK_DIALOG(dialog),
	    GTK_RESPONSE_REJECT, 1);
    gtk_dialog_set_response_sensitive(GTK_DIALOG(dialog),
	    GTK_RESPONSE_ACCEPT, 0);

    gtk_window_set_focus_on_map(GTK_WINDOW(dialog), FALSE);
    gtk_window_set_role(GTK_WINDOW(dialog), "notify_dialog");

    gtk_container_set_border_width(GTK_CONTAINER(dialog), 6);
    gtk_window_set_resizable(GTK_WINDOW(dialog), FALSE);
    gtk_dialog_set_has_separator(GTK_DIALOG(dialog), FALSE);
    gtk_box_set_spacing(GTK_BOX(GTK_DIALOG(dialog)->vbox), 12);
    gtk_container_set_border_width(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), 6);

    hbox = gtk_hbox_new(FALSE, 12);
    vbox = gtk_vbox_new(FALSE, 0);
    gtk_container_add(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), hbox);

    gtk_box_pack_start(GTK_BOX(hbox), img, FALSE, FALSE, 0);

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    label_pat = g_strdup_printf("<span weight=\"bold\" size=\"larger\">"
	    "%s</span>\n", context->smstate->received_question ?
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	    _("Authenticating to %s") :
	    _("Authenticating %s"));
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    label_text = g_strdup_printf(label_pat, context->username);
    g_free(label_pat);
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    label = gtk_label_new(NULL);

    gtk_label_set_markup(GTK_LABEL(label), label_text);
    gtk_label_set_selectable(GTK_LABEL(label), 1);
    g_free(label_text);
    gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
    gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
    gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0);

    proglabel = gtk_label_new(NULL);
    gtk_label_set_selectable(GTK_LABEL(proglabel), 1);
    gtk_label_set_line_wrap(GTK_LABEL(proglabel), TRUE);
    gtk_misc_set_alignment(GTK_MISC(proglabel), 0, 0);
    gtk_box_pack_start(GTK_BOX(vbox), proglabel, FALSE, FALSE, 0);
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    /* Create the progress bar */
    bar = gtk_progress_bar_new();
    gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(bar), 0.1);
    gtk_box_pack_start(GTK_BOX(vbox), bar, FALSE, FALSE, 0);
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    gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 0);

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    conv = otrg_plugin_context_to_conv(context, 0);
    smp_data = purple_conversation_get_data(conv, "otr-smpdata");
    if (smp_data) {
	smp_data->smp_progress_dialog = dialog;
	smp_data->smp_progress_bar = bar;
	smp_data->smp_progress_label = proglabel;
    }
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    gtk_label_set_text(GTK_LABEL(proglabel), _("Waiting for buddy..."));
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    g_signal_connect(G_OBJECT(dialog), "response",
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	     G_CALLBACK(smp_progress_response_cb),
	     context);
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    gtk_widget_show_all(dialog);

    return dialog;
}

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/* This is just like purple_notify_message, except: (a) it doesn't grab
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 * keyboard focus, (b) the button is "OK" instead of "Close", and (c)
 * the labels aren't limited to 2K. */
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static void otrg_gtk_dialog_notify_message(PurpleNotifyMsgType type,
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	const char *accountname, const char *protocol, const char *username,
	const char *title, const char *primary, const char *secondary)
{
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    create_dialog(NULL, type, title, primary, secondary, 1, NULL, NULL, NULL);
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}

struct s_OtrgDialogWait {
    GtkWidget *dialog;
    GtkWidget *label;
};

/* Put up a Please Wait dialog, with the "OK" button desensitized.
 * Return a handle that must eventually be passed to
 * otrg_dialog_private_key_wait_done. */
static OtrgDialogWaitHandle otrg_gtk_dialog_private_key_wait_start(
	const char *account, const char *protocol)
{
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    PurplePlugin *p;
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    const char *title = _("Generating private key");
    const char *primary = _("Please wait");
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    char *secondary;
    const char *protocol_print;
    GtkWidget *label;
    GtkWidget *dialog;
    OtrgDialogWaitHandle handle;

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    p = purple_find_prpl(protocol);
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    protocol_print = (p ? p->info->name : _("Unknown"));
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    /* Create the Please Wait... dialog */
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    secondary = g_strdup_printf(_("Generating private key for %s (%s)..."),
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	    account, protocol_print);
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    dialog = create_dialog(NULL, PURPLE_NOTIFY_MSG_INFO, title, primary,
	    secondary, 0, &label, NULL, NULL);
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    handle = malloc(sizeof(struct s_OtrgDialogWait));
    handle->dialog = dialog;
    handle->label = label;

    /* Make sure the dialog is actually displayed before doing any
     * compute-intensive stuff. */
    while (gtk_events_pending ()) {
	gtk_main_iteration ();
    }
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    g_free(secondary);

    return handle;
}

static int otrg_gtk_dialog_display_otr_message(const char *accountname,
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	const char *protocol, const char *username, const char *msg,
	int force_create)
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{
    /* See if there's a conversation window we can put this in. */
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    PurpleConversation *conv = otrg_plugin_userinfo_to_conv(accountname,
	    protocol, username, force_create);

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    if (!conv) return -1;

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    purple_conversation_write(conv, NULL, msg, PURPLE_MESSAGE_SYSTEM,
	    time(NULL));
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    return 0;
}

/* End a Please Wait dialog. */
static void otrg_gtk_dialog_private_key_wait_done(OtrgDialogWaitHandle handle)
{
    const char *oldmarkup;
    char *newmarkup;

    oldmarkup = gtk_label_get_label(GTK_LABEL(handle->label));
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    newmarkup = g_strdup_printf(_("%s Done."), oldmarkup);
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    gtk_label_set_markup(GTK_LABEL(handle->label), newmarkup);
    gtk_widget_show(handle->label);
    gtk_dialog_set_response_sensitive(GTK_DIALOG(handle->dialog),
	    GTK_RESPONSE_ACCEPT, 1);

    g_free(newmarkup);
    free(handle);
}

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/* Inform the user that an unknown fingerprint was received. */
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static void otrg_gtk_dialog_unknown_fingerprint(OtrlUserState us,
	const char *accountname, const char *protocol, const char *who,
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	unsigned char fingerprint[20])
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{
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    PurpleConversation *conv;
    char *buf;
    ConnContext *context;
    int seenbefore = FALSE;

    /* Figure out if this is the first fingerprint we've seen for this
     * user. */
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    context = otrl_context_find(us, who, accountname, protocol,
	    OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);

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    if (context) {
	Fingerprint *fp = context->fingerprint_root.next;
	while(fp) {
	    if (memcmp(fingerprint, fp->fingerprint, 20)) {
		/* This is a previously seen fingerprint for this user,
		 * different from the one we were passed. */
		seenbefore = TRUE;
		break;
	    }
	    fp = fp->next;
	}
    }
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    if (seenbefore) {
	buf = g_strdup_printf(_("%s is contacting you from an unrecognized "
		    "computer.  You should <a href=\"%s%s\">authenticate</a> "
		    "this buddy."), who, AUTHENTICATE_HELPURL, _("?lang=en"));
    } else {
	buf = g_strdup_printf(_("%s has not been authenticated yet.  You "
		    "should <a href=\"%s%s\">authenticate</a> this buddy."),
		who, AUTHENTICATE_HELPURL, _("?lang=en"));
    }
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    conv = otrg_plugin_userinfo_to_conv(accountname, protocol, who, TRUE);

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    purple_conversation_write(conv, NULL, buf, PURPLE_MESSAGE_SYSTEM,
	    time(NULL));

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    g_free(buf);
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}

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static void otrg_gtk_dialog_clicked_connect(GtkWidget *widget, gpointer data);

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static void build_otr_menu(ConvOrContext *convctx, GtkWidget *menu,
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	TrustLevel level);
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static void otr_refresh_otr_buttons(PurpleConversation *conv);
static void otr_destroy_top_menu_objects(PurpleConversation *conv);
static void otr_add_top_otr_menu(PurpleConversation *conv);
static void otr_add_buddy_top_menus(PurpleConversation *conv);
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static void otr_check_conv_status_change(PurpleConversation *conv);
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static void destroy_menuitem(GtkWidget *widget, gpointer data)
{
    gtk_widget_destroy(widget);
}

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static void otr_build_status_submenu(PidginWindow *win,
	ConvOrContext *convctx, GtkWidget *menu, TrustLevel level);

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static void dialog_update_label_conv(PurpleConversation *conv, TrustLevel level)
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{
    GtkWidget *label;
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    GtkWidget *icon;
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    GtkWidget *button;
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    GtkWidget *menu;
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    ConvOrContext *convctx;
    GHashTable * conv_or_ctx_map;
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    char *markup;
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    PidginConversation *gtkconv = PIDGIN_CONVERSATION(conv);
    label = purple_conversation_get_data(conv, "otr-label");
    icon = purple_conversation_get_data(conv, "otr-icon");
    button = purple_conversation_get_data(conv, "otr-button");
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    menu = purple_conversation_get_data(conv, "otr-menu");
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    otr_icon(icon, level, 1);
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    markup = g_strdup_printf(" <span color=\"%s\">%s</span>",
	    level == TRUST_FINISHED ? "#000000" :
	    level == TRUST_PRIVATE ? "#00a000" :
	    level == TRUST_UNVERIFIED ? "#a06000" :
	    "#ff0000",
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	    level == TRUST_FINISHED ? _("Finished") :
	    level == TRUST_PRIVATE ? _("Private") :
	    level == TRUST_UNVERIFIED ? _("Unverified") :
	    _("Not private"));
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    gtk_label_set_markup(GTK_LABEL(label), markup);
    g_free(markup);
    gtk_tooltips_set_tip(gtkconv->tooltips, button, _("OTR"), NULL);
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    /* Use any non-NULL value for "private", NULL for "not private" */
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    purple_conversation_set_data(conv, "otr-private",
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	    (level == TRUST_NOT_PRIVATE || level == TRUST_FINISHED) ?
		    NULL : conv);

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    /* Use any non-NULL value for "unauthenticated", NULL for
     * "authenticated" */
    purple_conversation_set_data(conv, "otr-authenticated",
	    (level == TRUST_PRIVATE) ? conv : NULL);

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    /* Use any non-NULL value for "finished", NULL for "not finished" */
    purple_conversation_set_data(conv, "otr-finished",
	    level == TRUST_FINISHED ? conv : NULL);
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    conv_or_ctx_map = purple_conversation_get_data(conv, "otr-convorctx");
    convctx = g_hash_table_lookup(conv_or_ctx_map, conv);

    if (!convctx) {
	convctx = malloc(sizeof(ConvOrContext));
	g_hash_table_insert(conv_or_ctx_map, conv, (gpointer)convctx);
    }

    convctx->convctx_type = convctx_conv;
    convctx->conv = conv;
    build_otr_menu(convctx, menu, level);
    otr_build_status_submenu(pidgin_conv_get_window(gtkconv), convctx, menu,
	    level);
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    conv = gtkconv->active_conv;
    otr_check_conv_status_change(conv);
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    /* Update other widgets */
    if (gtkconv != pidgin_conv_window_get_active_gtkconv(gtkconv->win)) {
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	return;
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    }

    otr_destroy_top_menu_objects(conv);
    otr_add_top_otr_menu(conv);
    otr_refresh_otr_buttons(conv);
    otr_add_buddy_top_menus(conv);
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}

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static void dialog_update_label(ConnContext *context)
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{
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    PurpleAccount *account;
    PurpleConversation *conv;
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    TrustLevel level = otrg_plugin_context_to_trust(context);
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    account = purple_accounts_find(context->accountname, context