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/* $Id: tstRTMemSafer.cpp $ */
/** @file
* IPRT Testcase - RTMemSafer* functions.
*/
/*
* Copyright (C) 2012-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program 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, in version 3 of the
* License.
*
* This program 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 this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/memsafer.h>
#include <iprt/asm.h>
#include <iprt/param.h>
#include <iprt/rand.h>
#include <iprt/string.h>
#include <iprt/test.h>
#if defined(VBOX) && (defined(RT_ARCH_X86) || defined(RT_ARCH_AMD64))
# include <VBox/sup.h>
#endif
static void doMemSaferScramble(RTTEST hTest, void *pvBuf, size_t cbAlloc)
{
RT_NOREF_PV(hTest);
/*
* Fill it with random bytes and make a reference copy of these.
*/
RTRandBytes(pvBuf, cbAlloc);
void *pvRef = RTMemDup(pvBuf, cbAlloc);
RTTESTI_CHECK_RETV(pvRef);
/*
* Scramble the allocation and check that it no longer matches the refernece bytes.
*/
int rc = RTMemSaferScramble(pvBuf, cbAlloc);
if (RT_SUCCESS(rc))
{
if (!memcmp(pvRef, pvBuf, cbAlloc))
RTTestIFailed("Memory blocks must differ (%z bytes, 0x%p vs. 0x%p)!\n",
cbAlloc, pvRef, pvBuf);
else
{
/*
* Check that unscrambling returns the original content.
*/
rc = RTMemSaferUnscramble(pvBuf, cbAlloc);
if (RT_SUCCESS(rc))
{
if (memcmp(pvRef, pvBuf, cbAlloc))
RTTestIFailed("Memory blocks must not differ (%z bytes, 0x%p vs. 0x%p)!\n",
cbAlloc, pvRef, pvBuf);
}
else
RTTestIFailed("Unscrambling %z bytes failed with %Rrc!\n", cbAlloc, rc);
}
}
else
RTTestIFailed("Scrambling %z bytes failed with %Rrc!\n", cbAlloc, rc);
RTMemFree(pvRef);
}
static void doMemSaferAllocation(RTTEST hTest)
{
size_t cbAlloc = RTRandS32Ex(1, _1M) * sizeof(uint8_t);
void *pvBuf = NULL;
int rc = RTMemSaferAllocZEx(&pvBuf, cbAlloc, 0);
if (RT_SUCCESS(rc))
{
/* Fill it with random bytes. */
RTRandBytes(pvBuf, cbAlloc);
/* Scrambling test */
doMemSaferScramble(hTest, pvBuf, cbAlloc);
RTMemSaferFree(pvBuf, cbAlloc);
}
else
RTTestIFailed("Allocating %z bytes of secure memory failed with %Rrc\n", cbAlloc, rc);
}
static void doMemRealloc(RTTEST hTest)
{
RTTestPrintf(hTest, RTTESTLVL_ALWAYS, "%u reallocation, grow by 1 bytes\n", PAGE_SIZE * 2);
size_t cbAlloc = RTRandS32Ex(1, _16K);
void *pvBuf = NULL;
RTTESTI_CHECK_RC_OK_RETV(RTMemSaferAllocZEx(&pvBuf, cbAlloc, 0));
for (uint32_t i = 0; i <= PAGE_SIZE * 2; i++)
{
cbAlloc += 1;
RTTESTI_CHECK_RC_OK_RETV(RTMemSaferReallocZEx(cbAlloc - 1, pvBuf, cbAlloc, &pvBuf, 0));
memset(pvBuf, i & 0x7f, cbAlloc);
}
RTMemSaferFree(pvBuf, cbAlloc);
RTTestPrintf(hTest, RTTESTLVL_ALWAYS, "100 random reallocations\n");
uint8_t chFiller = 0x42;
cbAlloc = 0;
pvBuf = NULL;
for (uint32_t i = 1; i <= 100; i++)
{
uint32_t cbNew = RTRandS32Ex(1, _16K + (i / 4) * _16K);
RTTESTI_CHECK_RC_OK_RETV(RTMemSaferReallocZEx(cbAlloc, pvBuf, cbNew, &pvBuf, 0));
RTTESTI_CHECK(ASMMemIsAllU8(pvBuf, RT_MIN(cbAlloc, cbNew), chFiller));
chFiller += 0x31;
memset(pvBuf, chFiller, cbNew);
cbAlloc = cbNew;
}
RTTESTI_CHECK_RC_OK_RETV(RTMemSaferReallocZEx(cbAlloc, pvBuf, 0, &pvBuf, 0));
RTTESTI_CHECK(pvBuf == NULL);
}
int main()
{
RTTEST hTest;
RTEXITCODE rcExit = RTTestInitAndCreate("tstRTMemSafer", &hTest);
if (rcExit != RTEXITCODE_SUCCESS)
return rcExit;
RTTestBanner(hTest);
#if defined(VBOX) && (defined(RT_ARCH_X86) || defined(RT_ARCH_AMD64))
SUPR3Init(NULL);
#endif
/*
* Not using sub-tests here, just printing progress.
*/
RTTestPrintf(hTest, RTTESTLVL_ALWAYS, "20 random allocations\n");
for (uint32_t i = 0; i < 20; i++)
doMemSaferAllocation(hTest);
doMemRealloc(hTest);
return RTTestSummaryAndDestroy(hTest);
}
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