1 files changed, 189 insertions, 0 deletions
diff --git a/src/VBox/HostDrivers/Support/SUPR3HardenedNoCrt.cpp b/src/VBox/HostDrivers/Support/SUPR3HardenedNoCrt.cpp
new file mode 100644
index 00000000..ce456e3b
--- /dev/null
+++ b/src/VBox/HostDrivers/Support/SUPR3HardenedNoCrt.cpp
@@ -0,0 +1,189 @@
+/* $Id: SUPR3HardenedNoCrt.cpp $ */
+/** @file
+ * VirtualBox Support Library - Hardened main() no-crt routines.
+ */
+
+/*
+ * Copyright (C) 2006-2023 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                                                                                                                 *
+*********************************************************************************************************************************/
+#if RT_OS_WINDOWS
+# include <iprt/win/windows.h>
+#endif
+
+#include <VBox/sup.h>
+
+#include "SUPLibInternal.h"
+
+
+#ifdef SUP_HARDENED_NEED_CRT_FUNCTIONS /** @todo this crap is obsolete. */
+
+/** memcmp */
+DECLHIDDEN(int) suplibHardenedMemComp(void const *pvDst, const void *pvSrc, size_t cbToComp)
+{
+    size_t const   *puDst = (size_t const *)pvDst;
+    size_t const   *puSrc = (size_t const *)pvSrc;
+    while (cbToComp >= sizeof(size_t))
+    {
+        if (*puDst != *puSrc)
+            break;
+        puDst++;
+        puSrc++;
+        cbToComp -= sizeof(size_t);
+    }
+
+    uint8_t const  *pbDst = (uint8_t const *)puDst;
+    uint8_t const  *pbSrc = (uint8_t const *)puSrc;
+    while (cbToComp > 0)
+    {
+        if (*pbDst != *pbSrc)
+        {
+            if (*pbDst < *pbSrc)
+                return -1;
+            return 1;
+        }
+
+        pbDst++;
+        pbSrc++;
+        cbToComp--;
+    }
+
+    return 0;
+}
+
+
+/** memcpy */
+DECLHIDDEN(void *) suplibHardenedMemCopy(void *pvDst, const void *pvSrc, size_t cbToCopy)
+{
+    size_t         *puDst = (size_t *)pvDst;
+    size_t const   *puSrc = (size_t const *)pvSrc;
+    while (cbToCopy >= sizeof(size_t))
+    {
+        *puDst++ = *puSrc++;
+        cbToCopy -= sizeof(size_t);
+    }
+
+    uint8_t        *pbDst = (uint8_t *)puDst;
+    uint8_t const  *pbSrc = (uint8_t const *)puSrc;
+    while (cbToCopy > 0)
+    {
+        *pbDst++ = *pbSrc++;
+        cbToCopy--;
+    }
+
+    return pvDst;
+}
+
+
+/** memset */
+DECLHIDDEN(void *) suplibHardenedMemSet(void *pvDst, int ch, size_t cbToSet)
+{
+    uint8_t *pbDst = (uint8_t *)pvDst;
+    while (cbToSet > 0)
+    {
+        *pbDst++ = (uint8_t)ch;
+        cbToSet--;
+    }
+
+    return pvDst;
+}
+
+
+/** strcpy */
+DECLHIDDEN(char *) suplibHardenedStrCopy(char *pszDst, const char *pszSrc)
+{
+    char *pszRet = pszDst;
+    char ch;
+    do
+    {
+        ch = *pszSrc++;
+        *pszDst++ = ch;
+    } while (ch);
+    return pszRet;
+}
+
+
+/** strlen */
+DECLHIDDEN(size_t) suplibHardenedStrLen(const char *psz)
+{
+    const char *pszStart = psz;
+    while (*psz)
+        psz++;
+    return psz - pszStart;
+}
+
+
+/** strcat */
+DECLHIDDEN(char *) suplibHardenedStrCat(char *pszDst, const char *pszSrc)
+{
+    char *pszRet = pszDst;
+    while (*pszDst)
+        pszDst++;
+    suplibHardenedStrCopy(pszDst, pszSrc);
+    return pszRet;
+}
+
+
+/** strcmp */
+DECLHIDDEN(int) suplibHardenedStrCmp(const char *psz1, const char *psz2)
+{
+    for (;;)
+    {
+        char ch1 = *psz1++;
+        char ch2 = *psz2++;
+        if (ch1 != ch2)
+            return ch1 < ch2 ? -1 : 1;
+        if (ch1 == 0)
+            return 0;
+    }
+}
+
+
+/** strncmp */
+DECLHIDDEN(int) suplibHardenedStrNCmp(const char *psz1, const char *psz2, size_t cchMax)
+{
+    while (cchMax-- > 0)
+    {
+        char ch1 = *psz1++;
+        char ch2 = *psz2++;
+        if (ch1 != ch2)
+            return ch1 < ch2 ? -1 : 1;
+        if (ch1 == 0)
+            break;
+    }
+    return 0;
+}
+
+#endif /* SUP_HARDENED_NEED_CRT_FUNCTIONS */
+