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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
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/* unit-test-secmem.c: Test low level secure memory allocation functionality
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Copyright (C) 2007 Stefan Walter
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The Gnome Keyring Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome Keyring 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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the Gnome Library; see the file COPYING.LIB. If not,
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see <http://www.gnu.org/licenses/>.
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Author: Stef Walter <stef@memberwebs.com>
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*/
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#include "config.h"
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#include "egg/egg-secure-memory.h"
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#include <glib.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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EGG_SECURE_DEFINE_GLIB_GLOBALS ();
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/* Declared in egg-secure-memory.c */
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extern int egg_secure_warnings;
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EGG_SECURE_DECLARE (tests);
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/*
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* Each test looks like (on one line):
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* void unit_test_xxxxx (CuTest* cu)
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*
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* Each setup looks like (on one line):
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* void unit_setup_xxxxx (void);
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*
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* Each teardown looks like (on one line):
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* void unit_teardown_xxxxx (void);
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*
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* Tests be run in the order specified here.
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*/
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static gsize
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find_non_zero (gpointer mem, gsize len)
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{
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guchar *b, *e;
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gsize sz = 0;
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for (b = (guchar*)mem, e = ((guchar*)mem) + len; b != e; ++b, ++sz) {
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if (*b != 0x00)
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return sz;
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}
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return G_MAXSIZE;
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}
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static void
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test_alloc_free (void)
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{
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gpointer p;
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gboolean ret;
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p = egg_secure_alloc_full ("tests", 512, 0);
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g_assert (p != NULL);
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g_assert_cmpint (G_MAXSIZE, ==, find_non_zero (p, 512));
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memset (p, 0x67, 512);
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ret = egg_secure_check (p);
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g_assert (ret == TRUE);
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egg_secure_free_full (p, 0);
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}
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static void
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test_realloc_across (void)
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{
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gpointer p, p2;
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/* Tiny allocation */
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p = egg_secure_realloc_full ("tests", NULL, 1088, 0);
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g_assert (p != NULL);
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g_assert_cmpint (G_MAXSIZE, ==, find_non_zero (p, 1088));
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/* Reallocate to a large one, will have to have changed blocks */
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p2 = egg_secure_realloc_full ("tests", p, 16200, 0);
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g_assert (p2 != NULL);
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g_assert_cmpint (G_MAXSIZE, ==, find_non_zero (p2, 16200));
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egg_secure_free (p2);
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}
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static void
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test_alloc_two (void)
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{
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gpointer p, p2;
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gboolean ret;
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p2 = egg_secure_alloc_full ("tests", 4, 0);
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g_assert (p2 != NULL);
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g_assert_cmpint (G_MAXSIZE, ==, find_non_zero (p2, 4));
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memset (p2, 0x67, 4);
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p = egg_secure_alloc_full ("tests", 16200, 0);
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g_assert (p != NULL);
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g_assert_cmpint (G_MAXSIZE, ==, find_non_zero (p, 16200));
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memset (p, 0x67, 16200);
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ret = egg_secure_check (p);
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g_assert (ret == TRUE);
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egg_secure_free_full (p2, 0);
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egg_secure_free_full (p, 0);
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}
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static void
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test_realloc (void)
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{
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gchar *str = "a test string to see if realloc works properly";
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gpointer p, p2;
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gsize len;
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len = strlen (str) + 1;
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p = egg_secure_realloc_full ("tests", NULL, len, 0);
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g_assert (p != NULL);
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g_assert_cmpint (G_MAXSIZE, ==, find_non_zero (p, len));
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strcpy ((gchar*)p, str);
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p2 = egg_secure_realloc_full ("tests", p, 512, 0);
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g_assert (p2 != NULL);
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g_assert_cmpint (G_MAXSIZE, ==, find_non_zero (((gchar*)p2) + len, 512 - len));
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g_assert (strcmp (p2, str) == 0);
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p = egg_secure_realloc_full ("tests", p2, 0, 0);
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g_assert (p == NULL);
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}
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static void
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test_multialloc (void)
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{
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GPtrArray *memory;
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gpointer data;
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gsize size;
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int i, action, index;
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/* A predetermined seed to get a predetermined pattern */
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g_random_set_seed (15);
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memory = g_ptr_array_new ();
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/* Don't print "can't allocate" warnings */
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egg_secure_warnings = 0;
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for (i = 0; TRUE; ++i) {
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/* Determine what we want to do */
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if (memory->len > 0) {
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if (i > 100000) /* Once we've done 100000 alocations start freeing */
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action = 2;
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else
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action = g_random_int_range (0, 3);
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} else {
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action = 0; /* No allocations, so allocate */
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}
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switch (action) {
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case 0: /* Allocate some memory */
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size = g_random_int_range (1, 16384);
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data = egg_secure_alloc (size);
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g_assert (data != NULL);
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memset (data, 0xCAFEBABE, size);
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g_ptr_array_add (memory, data);
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break;
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case 1: /* Reallocate some memory */
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index = g_random_int_range (0, memory->len);
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data = g_ptr_array_index (memory, index);
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g_assert (data != NULL);
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size = g_random_int_range (1, 16384);
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data = egg_secure_realloc (data, size);
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g_assert (data != NULL);
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memset (data, 0xCAFEBABE, size);
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g_ptr_array_index (memory, index) = data;
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break;
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case 2: /* Free some memory */
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index = g_random_int_range (0, memory->len);
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data = g_ptr_array_remove_index_fast (memory, index);
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g_assert (data != NULL);
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egg_secure_free (data);
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break;
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default:
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g_assert_not_reached ();
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}
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egg_secure_validate ();
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if (i > 100000 && !memory->len)
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break;
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}
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g_assert (memory->len == 0);
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for (i = 0; i < memory->len; i++)
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egg_secure_free (memory->pdata[i]);
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g_ptr_array_free (memory, TRUE);
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egg_secure_warnings = 1;
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}
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static void
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test_clear (void)
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{
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gpointer p;
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p = egg_secure_alloc_full ("tests", 188, 0);
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g_assert (p != NULL);
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memset (p, 0x89, 188);
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g_assert (memchr (p, 0x89, 188) == p);
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egg_secure_clear (p, 188);
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g_assert (memchr (p, 0x89, 188) == NULL);
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egg_secure_free_full (p, 0);
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}
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static void
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test_strclear (void)
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{
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gchar *str;
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str = egg_secure_strdup ("secret");
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g_assert (str != NULL);
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g_assert_cmpuint (strlen (str), ==, 6);
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g_assert (strchr (str, 't') == str + 5);
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egg_secure_strclear (str);
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g_assert_cmpuint (strlen (str), ==, 6);
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g_assert (strchr (str, 't') == NULL);
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egg_secure_free_full (str, 0);
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}
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int
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main (int argc, char **argv)
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{
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g_test_init (&argc, &argv, NULL);
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g_test_add_func ("/secmem/alloc_free", test_alloc_free);
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g_test_add_func ("/secmem/realloc_across", test_realloc_across);
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g_test_add_func ("/secmem/alloc_two", test_alloc_two);
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g_test_add_func ("/secmem/realloc", test_realloc);
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g_test_add_func ("/secmem/multialloc", test_multialloc);
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g_test_add_func ("/secmem/clear", test_clear);
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g_test_add_func ("/secmem/strclear", test_strclear);
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return g_test_run ();
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}
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