/* * Example fingerprint verification program, which verifies the right index * finger which has been previously enrolled to disk. * Copyright (C) 2007 Daniel Drake * Copyright (C) 2019 Marco Trevisan * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include "storage.h" typedef struct _VerifyData { GMainLoop *loop; int ret_value; } VerifyData; static void verify_data_free (VerifyData *verify_data) { g_main_loop_unref (verify_data->loop); g_free (verify_data); } G_DEFINE_AUTOPTR_CLEANUP_FUNC (VerifyData, verify_data_free) FpDevice *discover_device (GPtrArray * devices) { FpDevice *dev; if (!devices->len) return NULL; dev = g_ptr_array_index (devices, 0); printf ("Found device claimed by %s driver\n", fp_device_get_driver (dev)); return dev; } static void on_device_closed (FpDevice *dev, GAsyncResult *res, void *user_data) { VerifyData *verify_data = user_data; g_autoptr(GError) error = NULL; fp_device_close_finish (dev, res, &error); if (error) g_warning ("Failed closing device %s\n", error->message); g_main_loop_quit (verify_data->loop); } static void start_verification (FpDevice *dev, VerifyData *verify_data); static void on_verify_completed (FpDevice *dev, GAsyncResult *res, void *user_data) { VerifyData *verify_data = user_data; g_autoptr(FpPrint) print = NULL; g_autoptr(GError) error = NULL; char buffer[20]; gboolean match; if (!fp_device_verify_finish (dev, res, &match, &print, &error)) { g_warning ("Failed to verify print: %s", error->message); g_main_loop_quit (verify_data->loop); return; } if (match) { g_print ("MATCH!\n"); if (fp_device_supports_capture (dev) && print_image_save (print, "verify.pgm")) g_print ("Print image saved as verify.pgm"); verify_data->ret_value = EXIT_SUCCESS; } else { g_print ("NO MATCH!\n"); verify_data->ret_value = EXIT_FAILURE; } g_print ("Verify again? [Y/n]? "); if (fgets (buffer, sizeof (buffer), stdin) && (buffer[0] == 'Y' || buffer[0] == 'y')) { start_verification (dev, verify_data); return; } fp_device_close (dev, NULL, (GAsyncReadyCallback) on_device_closed, verify_data); } static void on_list_completed (FpDevice *dev, GAsyncResult *res, gpointer user_data) { VerifyData *verify_data = user_data; g_autoptr(GPtrArray) prints = NULL; g_autoptr(GError) error = NULL; prints = fp_device_list_prints_finish (dev, res, &error); if (!error) { FpPrint *verify_print = NULL; guint i; if (!prints->len) g_warning ("No prints saved on device"); for (i = 0; i < prints->len; ++i) { FpPrint *print = prints->pdata[i]; if (fp_print_get_finger (print) == FP_FINGER_RIGHT_INDEX && g_strcmp0 (fp_print_get_username (print), g_get_user_name ()) == 0) { if (!verify_print || (g_date_compare (fp_print_get_enroll_date (print), fp_print_get_enroll_date (verify_print)) >= 0)) verify_print = print; } } if (!verify_print) { g_warning ("Did you remember to enroll your right index " "finger first?"); g_main_loop_quit (verify_data->loop); return; } g_debug ("Comparing print with %s", fp_print_get_description (verify_print)); g_print ("Print loaded. Time to verify!\n"); fp_device_verify (dev, verify_print, NULL, (GAsyncReadyCallback) on_verify_completed, verify_data); } else { g_warning ("Loading prints failed with error %s", error->message); g_main_loop_quit (verify_data->loop); } } static void start_verification (FpDevice *dev, VerifyData *verify_data) { if (fp_device_has_storage (dev)) { g_print ("Creating finger template, using device storage...\n"); fp_device_list_prints (dev, NULL, (GAsyncReadyCallback) on_list_completed, verify_data); } else { g_print ("Loading previously enrolled right index finger data...\n"); g_autoptr(FpPrint) verify_print; verify_print = print_data_load (dev, FP_FINGER_RIGHT_INDEX); if (!verify_print) { g_warning ("Failed to load fingerprint data"); g_warning ("Did you remember to enroll your right index " "finger first?"); g_main_loop_quit (verify_data->loop); return; } g_print ("Print loaded. Time to verify!\n"); fp_device_verify (dev, verify_print, NULL, (GAsyncReadyCallback) on_verify_completed, verify_data); } } static void on_device_opened (FpDevice *dev, GAsyncResult *res, void *user_data) { VerifyData *verify_data = user_data; g_autoptr(GError) error = NULL; if (!fp_device_open_finish (dev, res, &error)) { g_warning ("Failed to open device: %s", error->message); g_main_loop_quit (verify_data->loop); return; } g_print ("Opened device. "); start_verification (dev, verify_data); } int main (void) { g_autoptr(FpContext) ctx = NULL; g_autoptr(VerifyData) verify_data = NULL; GPtrArray *devices; FpDevice *dev; setenv ("G_MESSAGES_DEBUG", "all", 0); setenv ("LIBUSB_DEBUG", "3", 0); ctx = fp_context_new (); devices = fp_context_get_devices (ctx); if (!devices) { g_warning ("Impossible to get devices"); return EXIT_FAILURE; } dev = discover_device (devices); if (!dev) { g_warning ("No devices detected."); return EXIT_FAILURE; } verify_data = g_new0 (VerifyData, 1); verify_data->ret_value = EXIT_FAILURE; verify_data->loop = g_main_loop_new (NULL, FALSE); fp_device_open (dev, NULL, (GAsyncReadyCallback) on_device_opened, verify_data); g_main_loop_run (verify_data->loop); return verify_data->ret_value; }