Add test for obtaining savedata, writing it to a file, reading it aga…

…in and checking if it was read correctly.

auto_tests/file_saving_test.c

@@ -0,0 +1,133 @@
+/* file_saving_test.c
+ *
+ * Small test for checking if obtaining savedata, saving it to disk and using
+ * works correctly.
+ *
+ *  Copyright (C) 2016 Tox project All Rights Reserved.
+ *
+ *  This file is part of Tox.
+ *
+ *  Tox is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Tox 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 Tox.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../toxcore/tox.h"
+#include "../toxencryptsave/toxencryptsave.h"
+
+static const char *pphrase = "bar", *name = "foo";
+
+static void tse(void)
+{
+    struct Tox_Options options;
+    tox_options_default(&options);
+    Tox *t = tox_new(&options, NULL);
+
+    tox_self_set_name(t, (const uint8_t *)name, strlen(name), NULL);
+
+    FILE *f = fopen("save", "w");
+
+    off_t sz = tox_get_savedata_size(t);
+    uint8_t *clear = (uint8_t *)malloc(sz);
+
+    /*this function does not write any data at all*/
+    tox_get_savedata(t, clear);
+
+    sz += TOX_PASS_ENCRYPTION_EXTRA_LENGTH;
+    uint8_t *cipher = (uint8_t *)malloc(sz);
+
+    TOX_ERR_ENCRYPTION eerr;
+
+    if (!tox_pass_encrypt(clear, sz - TOX_PASS_ENCRYPTION_EXTRA_LENGTH, (const uint8_t *)pphrase, strlen(pphrase), cipher,
+                          &eerr)) {
+        fprintf(stderr, "error: could not encrypt, error code %d\n", eerr);
+        exit(4);
+    }
+
+    size_t wv = fwrite(cipher, sizeof(*cipher), sz, f);
+    printf("written wv = %li of %li\n", wv, sz);
+
+    free(cipher);
+    free(clear);
+    fclose(f);
+    tox_kill(t);
+}
+
+static void tsd(void)
+{
+    FILE *f = fopen("save", "r");
+    fseek(f, 0, SEEK_END);
+    long sz = ftell(f);
+    fseek(f, 0, SEEK_SET);
+
+    uint8_t *cipher = (uint8_t *)malloc(sz);
+    uint8_t *clear = (uint8_t *)malloc(sz - TOX_PASS_ENCRYPTION_EXTRA_LENGTH);
+    size_t rv = fread(cipher, sizeof(*cipher), sz, f);
+    printf("read rv = %li of %li\n", rv, sz);
+
+    TOX_ERR_DECRYPTION derr;
+
+    if (!tox_pass_decrypt(cipher, sz, (const uint8_t *)pphrase, strlen(pphrase), clear, &derr)) {
+        fprintf(stderr, "error: could not decrypt, error code %d\n", derr);
+        exit(3);
+    }
+
+    struct Tox_Options options;
+
+    tox_options_default(&options);
+
+    tox_options_set_savedata_type(&options, TOX_SAVEDATA_TYPE_TOX_SAVE);
+
+    tox_options_set_savedata_data(&options, clear, sz);
+
+    TOX_ERR_NEW err;
+
+    Tox *t = tox_new(&options, &err);
+
+    if (t == NULL) {
+        fprintf(stderr, "error: tox_new returned the error value %d\n", err);
+        return;
+    }
+
+    uint8_t readname[TOX_MAX_NAME_LENGTH];
+    tox_self_get_name(t, readname);
+    readname[tox_self_get_name_size(t)] = '\0';
+
+    if (strcmp((const char *)readname, name)) {
+        fprintf(stderr, "error: name returned by tox_self_get_name does not match expected result\n");
+        exit(2);
+    }
+
+    free(cipher);
+    free(clear);
+    fclose(f);
+    tox_kill(t);
+}
+
+int main(void)
+{
+    tse();
+    tsd();
+
+    int ret = remove("./save");
+
+    if (ret != 0) {
+        fprintf(stderr, "error: could not remove savefile\n");
+    }
+
+    return 0;
+}