source: vbox/trunk/src/VBox/Runtime/testcase/tstRTMemSafer.cpp@ 52018

/* $Id: tstRTMemSafer.cpp 52018 2014-07-14 19:44:01Z vboxsync $ */
/** @file
 * IPRT Testcase - RTMemSafer* functions.
 */

/*
 * Copyright (C) 2012 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE 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.
 */


/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#include <iprt/path.h>
#include <iprt/rand.h>
#include <iprt/string.h>
#include <iprt/stream.h>
#include <iprt/initterm.h>
#include <iprt/param.h>
#include <iprt/memsafer.h>
#include <iprt/test.h>


/*******************************************************************************
*   Global Variables                                                           *
*******************************************************************************/

static void doMemSaferScramble(RTTEST hTest, void *pvBuf, size_t cbAlloc)
{
    RTTestPrintf(hTest, RTTESTLVL_ALWAYS, "Testing scrambling (%u bytes) ...\n", cbAlloc);

    RTRandBytes(pvBuf, cbAlloc);

    void *pvRef = RTMemDup(pvBuf, cbAlloc);
    if (!pvRef)
    {
        RTTestIFailed("No memory for reference buffer (%z bytes)\n", cbAlloc);
        return;
    }

    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
        {
            /* Test unscrambling. */
            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);

    RTTestPrintf(hTest, RTTESTLVL_ALWAYS, "Testing allocation of secure memory (%u bytes) ...\n", cbAlloc);
    void *pvBuf = NULL;
    int rc = RTMemSaferAllocZEx(&pvBuf, cbAlloc, RTMEMSAFER_ALLOC_EX_FLAGS_DEFAULT);
    if (RT_SUCCESS(rc))
    {
        /* Try to access memory. */
        RTRandBytes(pvBuf, cbAlloc);

        /* Scrambling test */
        doMemSaferScramble(hTest, pvBuf, cbAlloc);

#if 0
        /* Try to access memory after the allocation, should crash. */
        size_t cbAllocAligned = RT_ALIGN_Z(cbAlloc, PAGE_SIZE);
        *((uint8_t *)pvBuf + cbAllocAligned) = 0xcc;
#endif
        RTMemSaferFree(pvBuf, cbAlloc);
    }
    else
        RTTestIFailed("Allocating %z bytes of secure memory failed with %Rrc\n", cbAlloc, rc);
}

int main()
{
    RTTEST hTest;
    RTEXITCODE rcExit = RTTestInitAndCreate("memsafer", &hTest);
    if (rcExit != RTEXITCODE_SUCCESS)
        return rcExit;
    RTTestBanner(hTest);

    doMemSaferAllocation(hTest);

    return RTTestSummaryAndDestroy(hTest);
}