a4b6813ebf
This is useful so that the enroll and verify examples will not use the deprecated API anymore.
137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
/*
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* Trivial storage driver for example programs
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*
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* Copyright (C) 2019 Benjamin Berg <bberg@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; 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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#include <glib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <libfprint/fprint.h>
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#define STORAGE_FILE "test-storage.variant"
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static char *
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get_print_data_descriptor (struct fp_print_data *data, struct fp_dev *dev, enum fp_finger finger)
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{
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gint drv_id;
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gint devtype;
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if (data) {
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drv_id = fp_print_data_get_driver_id (data);
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devtype = fp_print_data_get_devtype (data);
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} else {
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drv_id = fp_driver_get_driver_id(fp_dev_get_driver (dev));
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devtype = fp_dev_get_devtype (dev);
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}
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return g_strdup_printf("%x/%08x/%x",
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drv_id,
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devtype,
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finger);
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}
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static GVariantDict*
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load_data(void)
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{
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GVariantDict *res;
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GVariant *var;
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gchar *contents = NULL;
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gssize length = 0;
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if (!g_file_get_contents (STORAGE_FILE, &contents, &length, NULL)) {
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g_warning ("Error loading storage, assuming it is empty");
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return g_variant_dict_new(NULL);
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}
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var = g_variant_new_from_data (G_VARIANT_TYPE_VARDICT, contents, length, FALSE, NULL, NULL);
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res = g_variant_dict_new(var);
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g_variant_unref(var);
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return res;
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}
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static int
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save_data(GVariant *data)
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{
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const gchar *contents = NULL;
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gsize length;
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length = g_variant_get_size(data);
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contents = (gchar*) g_variant_get_data (data);
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if (!g_file_set_contents (STORAGE_FILE, contents, length, NULL)) {
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g_warning ("Error saving storage,!");
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return -1;
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}
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g_variant_ref_sink(data);
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g_variant_unref(data);
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return 0;
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}
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int
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print_data_save(struct fp_print_data *fp_data, enum fp_finger finger)
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{
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gchar *descr = get_print_data_descriptor (fp_data, NULL, finger);
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GVariantDict *dict;
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GVariant *val;
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guchar *data;
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gsize size;
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int res;
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dict = load_data();
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size = fp_print_data_get_data(fp_data, &data);
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val = g_variant_new_fixed_array (G_VARIANT_TYPE("y"), data, size, 1);
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g_variant_dict_insert_value (dict, descr, val);
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res = save_data(g_variant_dict_end(dict));
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g_variant_dict_unref(dict);
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return res;
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}
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struct fp_print_data*
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print_data_load(struct fp_dev *dev, enum fp_finger finger)
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{
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gchar *descr = get_print_data_descriptor (NULL, dev, finger);
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GVariantDict *dict;
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guchar *stored_data;
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gsize stored_len;
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GVariant *val;
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struct fp_print_data *res = NULL;
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dict = load_data();
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val = g_variant_dict_lookup_value (dict, descr, G_VARIANT_TYPE ("ay"));
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if (val) {
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stored_data = (guchar*) g_variant_get_fixed_array (val, &stored_len, 1);
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res = fp_print_data_from_data(stored_data, stored_len);
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g_variant_unref(val);
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}
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g_variant_dict_unref(dict);
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g_free(descr);
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return res;
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}
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