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/* pinentry-gnome3.c
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* Copyright (C) 2015 g10 Code GmbH
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*
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* pinentry-gnome-3 is a pinentry application for GNOME 3. It tries
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* to follow the Gnome Human Interface Guide as close as possible.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <https://www.gnu.org/licenses/>.
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <gcr/gcr-base.h>
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#include <string.h>
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#include <stdlib.h>
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#include <assuan.h>
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#include "memory.h"
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#include "pinentry.h"
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#ifdef FALLBACK_CURSES
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#include "pinentry-curses.h"
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#endif
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#define PGMNAME "pinentry-gnome3"
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#ifndef VERSION
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# define VERSION
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#endif
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struct pe_gnome3_run_s {
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pinentry_t pinentry;
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GcrPrompt *prompt;
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GMainLoop *main_loop;
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int ret;
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guint timeout_id;
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int timed_out;
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};
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static void pe_gcr_prompt_password_done (GObject *source_object,
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GAsyncResult *res, gpointer user_data);
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static void pe_gcr_prompt_confirm_done (GObject *source_object,
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GAsyncResult *res, gpointer user_data);
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static gboolean pe_gcr_timeout_done (gpointer user_data);
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static gchar *
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pinentry_utf8_validate (gchar *text)
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{
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gchar *result;
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if (!text)
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return NULL;
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if (g_utf8_validate (text, -1, NULL))
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return g_strdup (text);
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/* Failure: Assume that it was encoded in the current locale and
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convert it to utf-8. */
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result = g_locale_to_utf8 (text, -1, NULL, NULL, NULL);
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if (!result)
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{
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gchar *p;
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result = p = g_strdup (text);
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while (!g_utf8_validate (p, -1, (const gchar **) &p))
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*p = '?';
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}
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return result;
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}
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static void
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_propagate_g_error_to_pinentry (pinentry_t pe, GError *error,
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gpg_err_code_t code, const char *loc)
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{
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char *t;
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/* We can't return the result of g_strdup_printf directly, because
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* this needs to be g_free'd, but the users of PE (e.g.,
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* pinentry_reset in pinentry/pinentry.c) use free. */
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t = g_strdup_printf ("%d: %s", error->code, error->message);
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if (t)
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{
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/* If strdup fails, then PE->SPECIFIC_ERR_INFO will be NULL,
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* which is exactly what we want if strdup fails. So, there is
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* no need to check for failure. */
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pe->specific_err_info = strdup (t);
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g_free (t);
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}
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else
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{
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pe->specific_err_info = NULL;
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}
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pe->specific_err = gpg_error (code);
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pe->specific_err_loc = loc;
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}
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static GcrPrompt *
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create_prompt (pinentry_t pe, int confirm)
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{
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GcrPrompt *prompt;
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GError *error = NULL;
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char *msg, *p;
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char window_id[32];
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/* Create the prompt. */
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prompt = GCR_PROMPT (gcr_system_prompt_open (pe->timeout ? pe->timeout : -1, NULL, &error));
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if (! prompt)
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{
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/* this means the timeout elapsed, but no prompt was ever shown. */
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if (error->code == GCR_SYSTEM_PROMPT_IN_PROGRESS)
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{
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fprintf (stderr, "Timeout: the Gcr system prompter was already in use.\n");
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pe->specific_err_info = strdup ("Timeout: the Gcr system prompter was already in use.");
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/* not using GPG_ERR_TIMEOUT here because the user never saw
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a prompt: */
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pe->specific_err = gpg_error (GPG_ERR_PIN_ENTRY);
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}
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else
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{
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fprintf (stderr, "couldn't create prompt for gnupg passphrase: %s\n",
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error->message);
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_propagate_g_error_to_pinentry (pe, error, GPG_ERR_CONFIGURATION,
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"gcr_system_prompt_open");
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}
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g_error_free (error);
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return NULL;
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}
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/* Set the messages for the various buttons, etc. */
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p = pinentry_get_title (pe);
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if (p)
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{
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msg = pinentry_utf8_validate (p);
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if (msg)
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{
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gcr_prompt_set_title (prompt, msg);
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g_free (msg);
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}
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free (p);
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}
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if (pe->description)
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{
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msg = pinentry_utf8_validate (pe->description);
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gcr_prompt_set_description (prompt, msg);
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g_free (msg);
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}
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/* An error occurred during the last prompt. */
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if (pe->error)
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{
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msg = pinentry_utf8_validate (pe->error);
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gcr_prompt_set_warning (prompt, msg);
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g_free (msg);
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}
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if (! pe->prompt && confirm)
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gcr_prompt_set_message (prompt, "Message");
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else if (! pe->prompt && ! confirm)
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gcr_prompt_set_message (prompt, "Enter Passphrase");
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else
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{
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msg = pinentry_utf8_validate (pe->prompt);
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gcr_prompt_set_message (prompt, msg);
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g_free (msg);
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}
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if (! confirm)
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gcr_prompt_set_password_new (prompt, !!pe->repeat_passphrase);
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if (pe->ok || pe->default_ok)
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{
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msg = pinentry_utf8_validate (pe->ok ?: pe->default_ok);
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gcr_prompt_set_continue_label (prompt, msg);
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g_free (msg);
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}
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/* XXX: Disable this button if pe->one_button is set. */
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if (pe->cancel || pe->default_cancel)
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{
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msg = pinentry_utf8_validate (pe->cancel ?: pe->default_cancel);
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gcr_prompt_set_cancel_label (prompt, msg);
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g_free (msg);
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}
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if (confirm && pe->notok)
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{
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/* XXX: Add support for the third option. */
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}
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/* gcr expects a string; we have a int. see gcr's
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ui/frob-system-prompt.c for example conversion using %lu */
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snprintf (window_id, sizeof (window_id), "%lu",
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(long unsigned int)pe->parent_wid);
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gcr_prompt_set_caller_window (prompt, window_id);
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#ifdef HAVE_LIBSECRET
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if (! confirm && pe->allow_external_password_cache && pe->keyinfo)
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{
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if (pe->default_pwmngr)
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{
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msg = pinentry_utf8_validate (pe->default_pwmngr);
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gcr_prompt_set_choice_label (prompt, msg);
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g_free (msg);
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}
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else
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gcr_prompt_set_choice_label
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(prompt, "Automatically unlock this key, whenever I'm logged in");
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}
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#endif
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return prompt;
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}
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static int
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gnome3_cmd_handler (pinentry_t pe)
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{
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struct pe_gnome3_run_s state;
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state.main_loop = g_main_loop_new (NULL, FALSE);
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if (!state.main_loop)
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{
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pe->specific_err_info = strdup ("Failed to create GMainLoop");
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pe->specific_err = gpg_error (GPG_ERR_PIN_ENTRY);
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pe->specific_err_loc = "g_main_loop_new";
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pe->canceled = 1;
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return -1;
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}
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state.pinentry = pe;
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state.ret = 0;
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state.timeout_id = 0;
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state.timed_out = 0;
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state.prompt = create_prompt (pe, !(pe->pin));
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if (!state.prompt)
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{
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pe->canceled = 1;
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return -1;
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}
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if (pe->pin)
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gcr_prompt_password_async (state.prompt, NULL, pe_gcr_prompt_password_done,
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&state);
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else
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gcr_prompt_confirm_async (state.prompt, NULL, pe_gcr_prompt_confirm_done,
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&state);
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if (pe->timeout)
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state.timeout_id = g_timeout_add_seconds (pe->timeout,
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pe_gcr_timeout_done, &state);
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g_main_loop_run (state.main_loop);
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/* clean up state: */
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if (state.timeout_id && !state.timed_out)
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g_source_destroy
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(g_main_context_find_source_by_id (NULL, state.timeout_id));
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g_clear_object (&state.prompt);
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g_main_loop_unref (state.main_loop);
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return state.ret;
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};
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static void
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pe_gcr_prompt_password_done (GObject *source_object,
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GAsyncResult *res, gpointer user_data)
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{
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struct pe_gnome3_run_s *state = user_data;
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GcrPrompt *prompt = GCR_PROMPT (source_object);
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if (state && prompt && state->prompt == prompt)
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{
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const char *password;
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GError *error = NULL;
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pinentry_t pe = state->pinentry;
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int ret = -1;
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/* "The returned password is valid until the next time a method
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is called to display another prompt." */
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password = gcr_prompt_password_finish (prompt, res, &error);
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if ((! password && ! error)
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|| (error && error->code == G_IO_ERROR_CANCELLED))
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{
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/* operation was cancelled or timed out. */
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ret = -1;
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if (state->timed_out)
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state->pinentry->specific_err = gpg_error (GPG_ERR_TIMEOUT);
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if (error)
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g_error_free (error);
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}
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else if (error)
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{
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_propagate_g_error_to_pinentry (pe, error,
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GPG_ERR_PIN_ENTRY,
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"gcr_system_password_finish");
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g_error_free (error);
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ret = -1;
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}
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else
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{
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pinentry_setbufferlen (pe, strlen (password) + 1);
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if (pe->pin)
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strcpy (pe->pin, password);
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if (pe->repeat_passphrase)
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pe->repeat_okay = 1;
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#ifdef HAVE_LIBSECRET
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if (pe->allow_external_password_cache && pe->keyinfo)
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pe->may_cache_password = gcr_prompt_get_choice_chosen (prompt);
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#endif
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ret = 1;
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}
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state->ret = ret;
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}
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if (state)
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g_main_loop_quit (state->main_loop);
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}
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static void
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pe_gcr_prompt_confirm_done (GObject *source_object, GAsyncResult *res,
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gpointer user_data)
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{
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struct pe_gnome3_run_s *state = user_data;
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GcrPrompt *prompt = GCR_PROMPT (source_object);
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if (state && prompt && state->prompt == prompt)
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{
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GcrPromptReply reply;
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GError *error = NULL;
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pinentry_t pe = state->pinentry;
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int ret = -1;
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/* XXX: We don't support a third button! */
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reply = gcr_prompt_confirm_finish (prompt, res, &error);
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if (error)
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{
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if (error->code == G_IO_ERROR_CANCELLED)
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{
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pe->canceled = 1;
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if (state->timed_out)
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state->pinentry->specific_err = gpg_error (GPG_ERR_TIMEOUT);
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}
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else
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_propagate_g_error_to_pinentry (state->pinentry, error, GPG_ERR_PIN_ENTRY,
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"gcr_system_confirm_finish");
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g_error_free (error);
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ret = 0;
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}
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else if (reply == GCR_PROMPT_REPLY_CONTINUE
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/* XXX: Hack since gcr doesn't yet support one button
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message boxes treat cancel the same as okay. */
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|| pe->one_button)
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{
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/* Confirmation. */
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ret = 1;
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}
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else /* GCR_PROMPT_REPLY_CANCEL */
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{
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pe->canceled = 1;
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if (state->timed_out)
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state->pinentry->specific_err = gpg_error (GPG_ERR_TIMEOUT);
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ret = 0;
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}
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state->ret = ret;
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}
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if (state)
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g_main_loop_quit (state->main_loop);
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}
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static gboolean
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pe_gcr_timeout_done (gpointer user_data)
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{
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struct pe_gnome3_run_s *state = user_data;
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if (!state)
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return FALSE;
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state->timed_out = 1;
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gcr_prompt_close (state->prompt);
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return FALSE;
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}
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|
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pinentry_cmd_handler_t pinentry_cmd_handler = gnome3_cmd_handler;
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|
|
|
|
|
/* Test whether there is a GNOME screensaver running that happens to
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|
|
* be locked. Note that if there is no GNOME screensaver running at
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|
* all the answer is still FALSE. */
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|
|
static gboolean
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|
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pe_gnome_screen_locked (void)
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|
|
{
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|
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GDBusConnection *dbus;
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|
GError *error = NULL;
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|
GVariant *reply, *reply_bool;
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gboolean ret;
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dbus = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
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if (!dbus)
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|
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{
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|
|
fprintf (stderr, "failed to connect to user session D-Bus (%d): %s",
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error ? error->code : -1,
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|
error ? error->message : "<no GError>");
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|
if (error)
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|
g_error_free (error);
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|
return FALSE;
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|
|
}
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|
|
|
|
|
/* this is intended to be the equivalent of:
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|
|
* dbus-send --print-reply=literal --session \
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|
|
* --dest=org.gnome.ScreenSaver \
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|
|
* /org/gnome/ScreenSaver \
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|
|
* org.gnome.ScreenSaver.GetActive
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|
|
*/
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|
|
reply = g_dbus_connection_call_sync (dbus,
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|
|
"org.gnome.ScreenSaver",
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|
|
"/org/gnome/ScreenSaver",
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|
|
"org.gnome.ScreenSaver",
|
|
|
"GetActive",
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|
|
NULL,
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|
|
((const GVariantType *) "(b)"),
|
|
|
G_DBUS_CALL_FLAGS_NO_AUTO_START,
|
|
|
-1,
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|
|
NULL,
|
|
|
&error);
|
|
|
g_object_unref(dbus);
|
|
|
if (!reply)
|
|
|
{
|
|
|
/* G_IO_ERROR_IS_DIRECTORY is the expected response when there is
|
|
|
* no gnome screensaver at all, don't be noisy in that case: */
|
|
|
if (!(error && error->code == G_IO_ERROR_IS_DIRECTORY))
|
|
|
fprintf (stderr, "Failed to get d-bus reply for org.gnome.ScreenSaver.GetActive (%d): %s\n",
|
|
|
error ? error->code : -1,
|
|
|
error ? error->message : "<no GError>");
|
|
|
if (error)
|
|
|
g_error_free (error);
|
|
|
return FALSE;
|
|
|
}
|
|
|
reply_bool = g_variant_get_child_value (reply, 0);
|
|
|
if (!reply_bool)
|
|
|
{
|
|
|
fprintf (stderr, "Failed to get d-bus boolean from org.gnome.ScreenSaver.GetActive; assuming screensaver is not locked\n");
|
|
|
ret = FALSE;
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
ret = g_variant_get_boolean (reply_bool);
|
|
|
g_variant_unref (reply_bool);
|
|
|
}
|
|
|
|
|
|
g_variant_unref (reply);
|
|
|
return ret;
|
|
|
}
|
|
|
|
|
|
/* Test whether we can create a system prompt or not. This briefly
|
|
|
* does create a system prompt, which blocks other tools from making
|
|
|
* the same request concurrently, so we just create it to test if it is
|
|
|
* available, and quickly close it. */
|
|
|
static int
|
|
|
pe_gcr_system_prompt_available (void)
|
|
|
{
|
|
|
GcrSystemPrompt *prompt;
|
|
|
GError *error = NULL;
|
|
|
int ret = 0;
|
|
|
|
|
|
prompt = GCR_SYSTEM_PROMPT (gcr_system_prompt_open (0, NULL, &error));
|
|
|
if (prompt)
|
|
|
{
|
|
|
ret = 1;
|
|
|
if (!gcr_system_prompt_close (prompt, NULL, &error))
|
|
|
fprintf (stderr, "failed to close test Gcr System Prompt (%d): %s\n",
|
|
|
error ? error->code : -1,
|
|
|
error ? error->message : "<no GError>");
|
|
|
g_clear_object (&prompt);
|
|
|
}
|
|
|
else if (error && error->code == GCR_SYSTEM_PROMPT_IN_PROGRESS)
|
|
|
{
|
|
|
/* This one particular failure is OK; we're clearly capable of
|
|
|
* making a system prompt, even though someone else has the
|
|
|
* system prompter right now: */
|
|
|
ret = 1;
|
|
|
}
|
|
|
|
|
|
if (error)
|
|
|
g_error_free (error);
|
|
|
return ret;
|
|
|
}
|
|
|
|
|
|
int
|
|
|
main (int argc, char *argv[])
|
|
|
{
|
|
|
pinentry_init (PGMNAME);
|
|
|
|
|
|
#ifdef FALLBACK_CURSES
|
|
|
if (!getenv ("DBUS_SESSION_BUS_ADDRESS"))
|
|
|
{
|
|
|
fprintf (stderr, "No $DBUS_SESSION_BUS_ADDRESS found,"
|
|
|
" falling back to curses\n");
|
|
|
pinentry_cmd_handler = curses_cmd_handler;
|
|
|
pinentry_set_flavor_flag ("curses");
|
|
|
}
|
|
|
else if (!pe_gcr_system_prompt_available ())
|
|
|
{
|
|
|
fprintf (stderr, "No Gcr System Prompter available,"
|
|
|
" falling back to curses\n");
|
|
|
pinentry_cmd_handler = curses_cmd_handler;
|
|
|
pinentry_set_flavor_flag ("curses");
|
|
|
}
|
|
|
else if (pe_gnome_screen_locked ())
|
|
|
{
|
|
|
fprintf (stderr, "GNOME screensaver is locked,"
|
|
|
" falling back to curses\n");
|
|
|
pinentry_cmd_handler = curses_cmd_handler;
|
|
|
pinentry_set_flavor_flag ("curses");
|
|
|
}
|
|
|
#endif
|
|
|
|
|
|
pinentry_parse_opts (argc, argv);
|
|
|
|
|
|
if (pinentry_loop ())
|
|
|
return 1;
|
|
|
|
|
|
return 0;
|
|
|
}
|
