SUPR3HardenedVerify.cpp@ 52004

Last change on this file since 52004 was 51912, checked in by vboxsync, 11 years ago
SUPR3HardenedVerify.cpp: Two more cases of CreateFileW with UTF-16.
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1	/* $Id: SUPR3HardenedVerify.cpp 51912 2014-07-07 21:46:57Z vboxsync $ */
2	/** @file
3	* VirtualBox Support Library - Verification of Hardened Installation.
4	*/
5
6	/*
7	* Copyright (C) 2006-2013 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27	/*******************************************************************************
28	* Header Files *
29	*******************************************************************************/
30	#if defined(RT_OS_OS2)
31	# define INCL_BASE
32	# define INCL_ERRORS
33	# include <os2.h>
34	# include <stdio.h>
35	# include <stdlib.h>
36	# include <unistd.h>
37	# include <sys/fcntl.h>
38	# include <sys/errno.h>
39	# include <sys/syslimits.h>
40
41	#elif defined(RT_OS_WINDOWS)
42	# include <Windows.h>
43	# ifndef IN_SUP_HARDENED_R3
44	# include <stdio.h>
45	# endif
46
47	#else /* UNIXes */
48	# include <sys/types.h>
49	# include <stdio.h>
50	# include <stdlib.h>
51	# include <dirent.h>
52	# include <dlfcn.h>
53	# include <fcntl.h>
54	# include <limits.h>
55	# include <errno.h>
56	# include <unistd.h>
57	# include <sys/stat.h>
58	# include <sys/time.h>
59	# include <sys/fcntl.h>
60	# include <pwd.h>
61	# ifdef RT_OS_DARWIN
62	# include <mach-o/dyld.h>
63	# endif
64
65	#endif
66
67	#include <VBox/sup.h>
68	#include <VBox/err.h>
69	#include <iprt/asm.h>
70	#include <iprt/ctype.h>
71	#include <iprt/param.h>
72	#include <iprt/path.h>
73	#include <iprt/string.h>
74
75	#include "SUPLibInternal.h"
76	#if defined(RT_OS_WINDOWS) && defined(VBOX_WITH_HARDENING)
77	# define SUPHNTVI_NO_NT_STUFF
78	# include "win/SUPHardenedVerify-win.h"
79	#endif
80
81
82	/*******************************************************************************
83	* Defined Constants And Macros *
84	*******************************************************************************/
85	/** The max path length acceptable for a trusted path. */
86	#define SUPR3HARDENED_MAX_PATH 260U
87
88	#ifdef RT_OS_SOLARIS
89	# define dirfd(d) ((d)->d_fd)
90	#endif
91
92	/** Compare table file names with externally supplied names. */
93	#if defined(RT_OS_WINDOWS) \|\| defined(RT_OS_OS2)
94	# define SUP_COMP_FILENAME suplibHardenedStrICmp
95	#else
96	# define SUP_COMP_FILENAME suplibHardenedStrCmp
97	#endif
98
99
100	/*******************************************************************************
101	* Global Variables *
102	*******************************************************************************/
103	/**
104	* The files that gets verified.
105	*
106	* @todo This needs reviewing against the linux packages.
107	* @todo The excessive use of kSupID_SharedLib needs to be reviewed at some point. For
108	* the time being we're building the linux packages with SharedLib pointing to
109	* AppPrivArch (lazy bird).
110	*/
111	static SUPINSTFILE const g_aSupInstallFiles[] =
112	{
113	/* type, dir, fOpt, "pszFile" */
114	/* ---------------------------------------------------------------------- */
115	{ kSupIFT_Dll, kSupID_AppPrivArch, false, "VMMR0.r0" },
116	{ kSupIFT_Dll, kSupID_AppPrivArch, false, "VBoxDDR0.r0" },
117	{ kSupIFT_Dll, kSupID_AppPrivArch, false, "VBoxDD2R0.r0" },
118
119	#ifdef VBOX_WITH_RAW_MODE
120	{ kSupIFT_Rc, kSupID_AppPrivArch, false, "VMMGC.gc" },
121	{ kSupIFT_Rc, kSupID_AppPrivArch, false, "VBoxDDGC.gc" },
122	{ kSupIFT_Rc, kSupID_AppPrivArch, false, "VBoxDD2GC.gc" },
123	#endif
124
125	{ kSupIFT_Dll, kSupID_SharedLib, false, "VBoxRT" SUPLIB_DLL_SUFF },
126	{ kSupIFT_Dll, kSupID_SharedLib, false, "VBoxVMM" SUPLIB_DLL_SUFF },
127	{ kSupIFT_Dll, kSupID_SharedLib, false, "VBoxREM" SUPLIB_DLL_SUFF },
128	#if HC_ARCH_BITS == 32
129	{ kSupIFT_Dll, kSupID_SharedLib, true, "VBoxREM32" SUPLIB_DLL_SUFF },
130	{ kSupIFT_Dll, kSupID_SharedLib, true, "VBoxREM64" SUPLIB_DLL_SUFF },
131	#endif
132	{ kSupIFT_Dll, kSupID_SharedLib, false, "VBoxDD" SUPLIB_DLL_SUFF },
133	{ kSupIFT_Dll, kSupID_SharedLib, false, "VBoxDD2" SUPLIB_DLL_SUFF },
134	{ kSupIFT_Dll, kSupID_SharedLib, false, "VBoxDDU" SUPLIB_DLL_SUFF },
135
136	//#ifdef VBOX_WITH_DEBUGGER_GUI
137	{ kSupIFT_Dll, kSupID_SharedLib, true, "VBoxDbg" SUPLIB_DLL_SUFF },
138	{ kSupIFT_Dll, kSupID_SharedLib, true, "VBoxDbg3" SUPLIB_DLL_SUFF },
139	//#endif
140
141	//#ifdef VBOX_WITH_SHARED_CLIPBOARD
142	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxSharedClipboard" SUPLIB_DLL_SUFF },
143	//#endif
144	//#ifdef VBOX_WITH_SHARED_FOLDERS
145	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxSharedFolders" SUPLIB_DLL_SUFF },
146	//#endif
147	//#ifdef VBOX_WITH_DRAG_AND_DROP
148	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxDragAndDropSvc" SUPLIB_DLL_SUFF },
149	//#endif
150	//#ifdef VBOX_WITH_GUEST_PROPS
151	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxGuestPropSvc" SUPLIB_DLL_SUFF },
152	//#endif
153	//#ifdef VBOX_WITH_GUEST_CONTROL
154	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxGuestControlSvc" SUPLIB_DLL_SUFF },
155	//#endif
156	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxHostChannel" SUPLIB_DLL_SUFF },
157	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxSharedCrOpenGL" SUPLIB_DLL_SUFF },
158	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxOGLhostcrutil" SUPLIB_DLL_SUFF },
159	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxOGLhosterrorspu" SUPLIB_DLL_SUFF },
160	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxOGLrenderspu" SUPLIB_DLL_SUFF },
161
162	{ kSupIFT_Exe, kSupID_AppBin, true, "VBoxManage" SUPLIB_EXE_SUFF },
163
164	#ifdef VBOX_WITH_MAIN
165	{ kSupIFT_Exe, kSupID_AppBin, false, "VBoxSVC" SUPLIB_EXE_SUFF },
166	#ifdef RT_OS_WINDOWS
167	{ kSupIFT_Dll, kSupID_SharedLib, false, "VBoxC" SUPLIB_DLL_SUFF },
168	#else
169	{ kSupIFT_Exe, kSupID_AppPrivArch, false, "VBoxXPCOMIPCD" SUPLIB_EXE_SUFF },
170	{ kSupIFT_Dll, kSupID_SharedLib, false, "VBoxXPCOM" SUPLIB_DLL_SUFF },
171	{ kSupIFT_Dll, kSupID_AppPrivArchComp, false, "VBoxXPCOMIPCC" SUPLIB_DLL_SUFF },
172	{ kSupIFT_Dll, kSupID_AppPrivArchComp, false, "VBoxC" SUPLIB_DLL_SUFF },
173	{ kSupIFT_Dll, kSupID_AppPrivArchComp, false, "VBoxSVCM" SUPLIB_DLL_SUFF },
174	{ kSupIFT_Data, kSupID_AppPrivArchComp, false, "VBoxXPCOMBase.xpt" },
175	#endif
176	#endif
177
178	{ kSupIFT_Dll, kSupID_SharedLib, true, "VRDPAuth" SUPLIB_DLL_SUFF },
179	{ kSupIFT_Dll, kSupID_SharedLib, true, "VBoxAuth" SUPLIB_DLL_SUFF },
180	{ kSupIFT_Dll, kSupID_SharedLib, true, "VBoxVRDP" SUPLIB_DLL_SUFF },
181
182	//#ifdef VBOX_WITH_HEADLESS
183	{ kSupIFT_Exe, kSupID_AppBin, true, "VBoxHeadless" SUPLIB_EXE_SUFF },
184	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxHeadless" SUPLIB_DLL_SUFF },
185	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxVideoRecFB" SUPLIB_DLL_SUFF },
186	//#endif
187
188	//#ifdef VBOX_WITH_QTGUI
189	{ kSupIFT_Exe, kSupID_AppBin, true, "VirtualBox" SUPLIB_EXE_SUFF },
190	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VirtualBox" SUPLIB_DLL_SUFF },
191	# if !defined(RT_OS_DARWIN) && !defined(RT_OS_WINDOWS) && !defined(RT_OS_OS2)
192	{ kSupIFT_Dll, kSupID_SharedLib, true, "VBoxKeyboard" SUPLIB_DLL_SUFF },
193	# endif
194	//#endif
195
196	//#ifdef VBOX_WITH_VBOXSDL
197	{ kSupIFT_Exe, kSupID_AppBin, true, "VBoxSDL" SUPLIB_EXE_SUFF },
198	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxSDL" SUPLIB_DLL_SUFF },
199	//#endif
200
201	//#ifdef VBOX_WITH_WEBSERVICES
202	{ kSupIFT_Exe, kSupID_AppBin, true, "vboxwebsrv" SUPLIB_EXE_SUFF },
203	//#endif
204
205	#ifdef RT_OS_LINUX
206	{ kSupIFT_Exe, kSupID_AppBin, true, "VBoxTunctl" SUPLIB_EXE_SUFF },
207	#endif
208
209	//#ifdef VBOX_WITH_NETFLT
210	{ kSupIFT_Exe, kSupID_AppBin, true, "VBoxNetDHCP" SUPLIB_EXE_SUFF },
211	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxNetDHCP" SUPLIB_DLL_SUFF },
212	//#endif
213
214	//#ifdef VBOX_WITH_LWIP_NAT
215	{ kSupIFT_Exe, kSupID_AppBin, true, "VBoxNetNAT" SUPLIB_EXE_SUFF },
216	{ kSupIFT_Dll, kSupID_AppPrivArch, true, "VBoxNetNAT" SUPLIB_DLL_SUFF },
217	//#endif
218	#if defined(VBOX_WITH_HARDENING) && defined(RT_OS_WINDOWS)
219	# define HARDENED_TESTCASE_BIN_ENTRY(a_szName) \
220	{ kSupIFT_TestExe, kSupID_AppBin, true, a_szName SUPLIB_EXE_SUFF }, \
221	{ kSupIFT_TestDll, kSupID_AppBin, true, a_szName SUPLIB_DLL_SUFF }
222	HARDENED_TESTCASE_BIN_ENTRY("tstMicro"),
223	HARDENED_TESTCASE_BIN_ENTRY("tstPDMAsyncCompletion"),
224	HARDENED_TESTCASE_BIN_ENTRY("tstPDMAsyncCompletionStress"),
225	HARDENED_TESTCASE_BIN_ENTRY("tstVMM"),
226	HARDENED_TESTCASE_BIN_ENTRY("tstVMREQ"),
227	# define HARDENED_TESTCASE_ENTRY(a_szName) \
228	{ kSupIFT_TestExe, kSupID_Testcase, true, a_szName SUPLIB_EXE_SUFF }, \
229	{ kSupIFT_TestDll, kSupID_Testcase, true, a_szName SUPLIB_DLL_SUFF }
230	HARDENED_TESTCASE_ENTRY("tstCFGM"),
231	HARDENED_TESTCASE_ENTRY("tstIntNet-1"),
232	HARDENED_TESTCASE_ENTRY("tstMMHyperHeap"),
233	HARDENED_TESTCASE_ENTRY("tstR0ThreadPreemptionDriver"),
234	HARDENED_TESTCASE_ENTRY("tstRTR0MemUserKernelDriver"),
235	HARDENED_TESTCASE_ENTRY("tstRTR0SemMutexDriver"),
236	HARDENED_TESTCASE_ENTRY("tstRTR0TimerDriver"),
237	HARDENED_TESTCASE_ENTRY("tstSSM"),
238	#endif
239	};
240
241
242	/** Array parallel to g_aSupInstallFiles containing per-file status info. */
243	static SUPVERIFIEDFILE g_aSupVerifiedFiles[RT_ELEMENTS(g_aSupInstallFiles)];
244
245	/** Array index by install directory specifier containing info about verified directories. */
246	static SUPVERIFIEDDIR g_aSupVerifiedDirs[kSupID_End];
247
248
249	/**
250	* Assembles the path to a directory.
251	*
252	* @returns VINF_SUCCESS on success, some error code on failure (fFatal
253	* decides whether it returns or not).
254	*
255	* @param enmDir The directory.
256	* @param pszDst Where to assemble the path.
257	* @param cchDst The size of the buffer.
258	* @param fFatal Whether failures should be treated as fatal (true) or not (false).
259	*/
260	static int supR3HardenedMakePath(SUPINSTDIR enmDir, char *pszDst, size_t cchDst, bool fFatal)
261	{
262	int rc;
263	switch (enmDir)
264	{
265	case kSupID_AppBin: /** @todo fix this AppBin crap (uncertain wtf some binaries actually are installed). */
266	case kSupID_Bin:
267	rc = supR3HardenedPathExecDir(pszDst, cchDst);
268	break;
269	case kSupID_SharedLib:
270	rc = supR3HardenedPathSharedLibs(pszDst, cchDst);
271	break;
272	case kSupID_AppPrivArch:
273	rc = supR3HardenedPathAppPrivateArch(pszDst, cchDst);
274	break;
275	case kSupID_AppPrivArchComp:
276	rc = supR3HardenedPathAppPrivateArch(pszDst, cchDst);
277	if (RT_SUCCESS(rc))
278	{
279	size_t off = suplibHardenedStrLen(pszDst);
280	if (cchDst - off >= sizeof("/components"))
281	suplibHardenedMemCopy(&pszDst[off], "/components", sizeof("/components"));
282	else
283	rc = VERR_BUFFER_OVERFLOW;
284	}
285	break;
286	case kSupID_AppPrivNoArch:
287	rc = supR3HardenedPathAppPrivateNoArch(pszDst, cchDst);
288	break;
289	case kSupID_Testcase:
290	rc = supR3HardenedPathExecDir(pszDst, cchDst);
291	if (RT_SUCCESS(rc))
292	{
293	size_t off = suplibHardenedStrLen(pszDst);
294	if (cchDst - off >= sizeof("/testcase"))
295	suplibHardenedMemCopy(&pszDst[off], "/testcase", sizeof("/testcase"));
296	else
297	rc = VERR_BUFFER_OVERFLOW;
298	}
299	break;
300	default:
301	return supR3HardenedError(VERR_INTERNAL_ERROR, fFatal,
302	"supR3HardenedMakePath: enmDir=%d\n", enmDir);
303	}
304	if (RT_FAILURE(rc))
305	supR3HardenedError(rc, fFatal,
306	"supR3HardenedMakePath: enmDir=%d rc=%d\n", enmDir, rc);
307	return rc;
308	}
309
310
311
312	/**
313	* Assembles the path to a file table entry, with or without the actual filename.
314	*
315	* @returns VINF_SUCCESS on success, some error code on failure (fFatal
316	* decides whether it returns or not).
317	*
318	* @param pFile The file table entry.
319	* @param pszDst Where to assemble the path.
320	* @param cchDst The size of the buffer.
321	* @param fWithFilename If set, the filename is included, otherwise it is omitted (no trailing slash).
322	* @param fFatal Whether failures should be treated as fatal (true) or not (false).
323	*/
324	static int supR3HardenedMakeFilePath(PCSUPINSTFILE pFile, char *pszDst, size_t cchDst, bool fWithFilename, bool fFatal)
325	{
326	/*
327	* Combine supR3HardenedMakePath and the filename.
328	*/
329	int rc = supR3HardenedMakePath(pFile->enmDir, pszDst, cchDst, fFatal);
330	if (RT_SUCCESS(rc) && fWithFilename)
331	{
332	size_t cchFile = suplibHardenedStrLen(pFile->pszFile);
333	size_t off = suplibHardenedStrLen(pszDst);
334	if (cchDst - off >= cchFile + 2)
335	{
336	pszDst[off++] = '/';
337	suplibHardenedMemCopy(&pszDst[off], pFile->pszFile, cchFile + 1);
338	}
339	else
340	rc = supR3HardenedError(VERR_BUFFER_OVERFLOW, fFatal,
341	"supR3HardenedMakeFilePath: pszFile=%s off=%lu\n",
342	pFile->pszFile, (long)off);
343	}
344	return rc;
345	}
346
347
348	/**
349	* Verifies a directory.
350	*
351	* @returns VINF_SUCCESS on success. On failure, an error code is returned if
352	* fFatal is clear and if it's set the function wont return.
353	* @param enmDir The directory specifier.
354	* @param fFatal Whether validation failures should be treated as
355	* fatal (true) or not (false).
356	*/
357	DECLHIDDEN(int) supR3HardenedVerifyFixedDir(SUPINSTDIR enmDir, bool fFatal)
358	{
359	/*
360	* Validate the index just to be on the safe side...
361	*/
362	if (enmDir <= kSupID_Invalid \|\| enmDir >= kSupID_End)
363	return supR3HardenedError(VERR_INTERNAL_ERROR, fFatal,
364	"supR3HardenedVerifyDir: enmDir=%d\n", enmDir);
365
366	/*
367	* Already validated?
368	*/
369	if (g_aSupVerifiedDirs[enmDir].fValidated)
370	return VINF_SUCCESS; /** @todo revalidate? */
371
372	/* initialize the entry. */
373	if (g_aSupVerifiedDirs[enmDir].hDir != 0)
374	supR3HardenedError(VERR_INTERNAL_ERROR, fFatal,
375	"supR3HardenedVerifyDir: hDir=%p enmDir=%d\n",
376	(void *)g_aSupVerifiedDirs[enmDir].hDir, enmDir);
377	g_aSupVerifiedDirs[enmDir].hDir = -1;
378	g_aSupVerifiedDirs[enmDir].fValidated = false;
379
380	/*
381	* Make the path and open the directory.
382	*/
383	char szPath[RTPATH_MAX];
384	int rc = supR3HardenedMakePath(enmDir, szPath, sizeof(szPath), fFatal);
385	if (RT_SUCCESS(rc))
386	{
387	#if defined(RT_OS_WINDOWS)
388	PRTUTF16 pwszPath;
389	rc = RTStrToUtf16(szPath, &pwszPath);
390	if (RT_SUCCESS(rc))
391	{
392	HANDLE hDir = CreateFileW(pwszPath,
393	GENERIC_READ,
394	FILE_SHARE_READ \| FILE_SHARE_DELETE \| FILE_SHARE_WRITE,
395	NULL,
396	OPEN_EXISTING,
397	FILE_ATTRIBUTE_NORMAL \| FILE_FLAG_BACKUP_SEMANTICS,
398	NULL);
399	if (hDir != INVALID_HANDLE_VALUE)
400	{
401	/** @todo check the type */
402	/* That's all on windows, for now at least... */
403	g_aSupVerifiedDirs[enmDir].hDir = (intptr_t)hDir;
404	g_aSupVerifiedDirs[enmDir].fValidated = true;
405	}
406	else if (enmDir == kSupID_Testcase)
407	{
408	g_aSupVerifiedDirs[enmDir].fValidated = true;
409	rc = VINF_SUCCESS; /* Optional directory, ignore if missing. */
410	}
411	else
412	{
413	int err = GetLastError();
414	rc = supR3HardenedError(VERR_PATH_NOT_FOUND, fFatal,
415	"supR3HardenedVerifyDir: Failed to open \"%s\": err=%d\n",
416	szPath, err);
417	}
418	RTUtf16Free(pwszPath);
419	}
420	else
421	rc = supR3HardenedError(rc, fFatal,
422	"supR3HardenedVerifyDir: Failed to convert \"%s\" to UTF-16: err=%d\n", szPath, rc);
423
424	#else /* UNIXY */
425	int fd = open(szPath, O_RDONLY, 0);
426	if (fd >= 0)
427	{
428	/*
429	* On unixy systems we'll make sure the directory is owned by root
430	* and not writable by the group and user.
431	*/
432	struct stat st;
433	if (!fstat(fd, &st))
434	{
435
436	if ( st.st_uid == 0
437	&& !(st.st_mode & (S_IWGRP \| S_IWOTH))
438	&& S_ISDIR(st.st_mode))
439	{
440	g_aSupVerifiedDirs[enmDir].hDir = fd;
441	g_aSupVerifiedDirs[enmDir].fValidated = true;
442	}
443	else
444	{
445	if (!S_ISDIR(st.st_mode))
446	rc = supR3HardenedError(VERR_NOT_A_DIRECTORY, fFatal,
447	"supR3HardenedVerifyDir: \"%s\" is not a directory\n",
448	szPath, (long)st.st_uid);
449	else if (st.st_uid)
450	rc = supR3HardenedError(VERR_ACCESS_DENIED, fFatal,
451	"supR3HardenedVerifyDir: Cannot trust the directory \"%s\": not owned by root (st_uid=%ld)\n",
452	szPath, (long)st.st_uid);
453	else
454	rc = supR3HardenedError(VERR_ACCESS_DENIED, fFatal,
455	"supR3HardenedVerifyDir: Cannot trust the directory \"%s\": group and/or other writable (st_mode=0%lo)\n",
456	szPath, (long)st.st_mode);
457	close(fd);
458	}
459	}
460	else
461	{
462	int err = errno;
463	rc = supR3HardenedError(VERR_ACCESS_DENIED, fFatal,
464	"supR3HardenedVerifyDir: Failed to fstat \"%s\": %s (%d)\n",
465	szPath, strerror(err), err);
466	close(fd);
467	}
468	}
469	else if (enmDir == kSupID_Testcase)
470	{
471	g_aSupVerifiedDirs[enmDir].fValidated = true;
472	rc = VINF_SUCCESS; /* Optional directory, ignore if missing. */
473	}
474	else
475	{
476	int err = errno;
477	rc = supR3HardenedError(VERR_PATH_NOT_FOUND, fFatal,
478	"supR3HardenedVerifyDir: Failed to open \"%s\": %s (%d)\n",
479	szPath, strerror(err), err);
480	}
481	#endif /* UNIXY */
482	}
483
484	return rc;
485	}
486
487
488	/**
489	* Verifies a file entry.
490	*
491	* @returns VINF_SUCCESS on success. On failure, an error code is returned if
492	* fFatal is clear and if it's set the function wont return.
493	*
494	* @param iFile The file table index of the file to be verified.
495	* @param fFatal Whether validation failures should be treated as
496	* fatal (true) or not (false).
497	* @param fLeaveFileOpen Whether the file should be left open.
498	*/
499	static int supR3HardenedVerifyFileInternal(int iFile, bool fFatal, bool fLeaveFileOpen)
500	{
501	PCSUPINSTFILE pFile = &g_aSupInstallFiles[iFile];
502	PSUPVERIFIEDFILE pVerified = &g_aSupVerifiedFiles[iFile];
503
504	/*
505	* Already done?
506	*/
507	if (pVerified->fValidated)
508	return VINF_SUCCESS; /** @todo revalidate? */
509
510
511	/* initialize the entry. */
512	if (pVerified->hFile != 0)
513	supR3HardenedError(VERR_INTERNAL_ERROR, fFatal,
514	"supR3HardenedVerifyFileInternal: hFile=%p (%s)\n",
515	(void *)pVerified->hFile, pFile->pszFile);
516	pVerified->hFile = -1;
517	pVerified->fValidated = false;
518
519	/*
520	* Verify the directory then proceed to open it.
521	* (This'll make sure the directory is opened and that we can (later)
522	* use openat if we wish.)
523	*/
524	int rc = supR3HardenedVerifyFixedDir(pFile->enmDir, fFatal);
525	if (RT_SUCCESS(rc))
526	{
527	char szPath[RTPATH_MAX];
528	rc = supR3HardenedMakeFilePath(pFile, szPath, sizeof(szPath), true /fWithFilename/, fFatal);
529	if (RT_SUCCESS(rc))
530	{
531	#if defined(RT_OS_WINDOWS)
532	PRTUTF16 pwszPath;
533	rc = RTStrToUtf16(szPath, &pwszPath);
534	if (RT_SUCCESS(rc))
535	{
536	HANDLE hFile = CreateFileW(pwszPath,
537	GENERIC_READ,
538	FILE_SHARE_READ,
539	NULL,
540	OPEN_EXISTING,
541	FILE_ATTRIBUTE_NORMAL,
542	NULL);
543	if (hFile != INVALID_HANDLE_VALUE)
544	{
545	# if defined(VBOX_WITH_HARDENING) && !defined(IN_SUP_R3_STATIC) /* Latter: Not in VBoxCpuReport and friends. */
546
547	char szErr[1024];
548	RTERRINFO ErrInfo;
549	RTErrInfoInit(&ErrInfo, szErr, sizeof(szErr));
550
551	uint32_t fFlags = SUPHNTVI_F_REQUIRE_BUILD_CERT;
552	if (pFile->enmType == kSupIFT_Rc)
553	fFlags \|= SUPHNTVI_F_RC_IMAGE;
554
555	rc = supHardenedWinVerifyImageByHandleNoName(hFile, fFlags, &ErrInfo);
556	if (RT_FAILURE(rc))
557	{
558	rc = supR3HardenedError(rc, fFatal, "supR3HardenedVerifyFileInternal: '%s': Image verify error rc=%Rrc: %s\n",
559	szPath, rc, szErr);
560	CloseHandle(hFile);
561	}
562	else
563	# endif
564	{
565	/* it's valid. */
566	if (fLeaveFileOpen)
567	pVerified->hFile = (intptr_t)hFile;
568	else
569	CloseHandle(hFile);
570	pVerified->fValidated = true;
571	}
572	}
573	else
574	{
575	int err = GetLastError();
576	if ( !pFile->fOptional
577	\|\| ( err != ERROR_FILE_NOT_FOUND
578	&& (err != ERROR_PATH_NOT_FOUND \|\| pFile->enmDir != kSupID_Testcase) ) )
579	rc = supR3HardenedError(VERR_PATH_NOT_FOUND, fFatal,
580	"supR3HardenedVerifyFileInternal: Failed to open '%s': err=%d\n", szPath, err);
581	}
582	RTUtf16Free(pwszPath);
583	}
584	else
585	rc = supR3HardenedError(rc, fFatal, "supR3HardenedVerifyFileInternal: Failed to convert '%s' to UTF-16: %Rrc\n",
586	szPath, rc);
587	#else /* UNIXY */
588	int fd = open(szPath, O_RDONLY, 0);
589	if (fd >= 0)
590	{
591	/*
592	* On unixy systems we'll make sure the directory is owned by root
593	* and not writable by the group and user.
594	*/
595	struct stat st;
596	if (!fstat(fd, &st))
597	{
598	if ( st.st_uid == 0
599	&& !(st.st_mode & (S_IWGRP \| S_IWOTH))
600	&& S_ISREG(st.st_mode))
601	{
602	/* it's valid. */
603	if (fLeaveFileOpen)
604	pVerified->hFile = fd;
605	else
606	close(fd);
607	pVerified->fValidated = true;
608	}
609	else
610	{
611	if (!S_ISREG(st.st_mode))
612	rc = supR3HardenedError(VERR_IS_A_DIRECTORY, fFatal,
613	"supR3HardenedVerifyFileInternal: \"%s\" is not a regular file\n",
614	szPath, (long)st.st_uid);
615	else if (st.st_uid)
616	rc = supR3HardenedError(VERR_ACCESS_DENIED, fFatal,
617	"supR3HardenedVerifyFileInternal: Cannot trust the file \"%s\": not owned by root (st_uid=%ld)\n",
618	szPath, (long)st.st_uid);
619	else
620	rc = supR3HardenedError(VERR_ACCESS_DENIED, fFatal,
621	"supR3HardenedVerifyFileInternal: Cannot trust the file \"%s\": group and/or other writable (st_mode=0%lo)\n",
622	szPath, (long)st.st_mode);
623	close(fd);
624	}
625	}
626	else
627	{
628	int err = errno;
629	rc = supR3HardenedError(VERR_ACCESS_DENIED, fFatal,
630	"supR3HardenedVerifyFileInternal: Failed to fstat \"%s\": %s (%d)\n",
631	szPath, strerror(err), err);
632	close(fd);
633	}
634	}
635	else
636	{
637	int err = errno;
638	if (!pFile->fOptional \|\| err != ENOENT)
639	rc = supR3HardenedError(VERR_PATH_NOT_FOUND, fFatal,
640	"supR3HardenedVerifyFileInternal: Failed to open \"%s\": %s (%d)\n",
641	szPath, strerror(err), err);
642	}
643	#endif /* UNIXY */
644	}
645	}
646
647	return rc;
648	}
649
650
651	/**
652	* Verifies that the specified table entry matches the given filename.
653	*
654	* @returns VINF_SUCCESS if matching. On mismatch fFatal indicates whether an
655	* error is returned or we terminate the application.
656	*
657	* @param iFile The file table index.
658	* @param pszFilename The filename.
659	* @param fFatal Whether validation failures should be treated as
660	* fatal (true) or not (false).
661	*/
662	static int supR3HardenedVerifySameFile(int iFile, const char *pszFilename, bool fFatal)
663	{
664	PCSUPINSTFILE pFile = &g_aSupInstallFiles[iFile];
665
666	/*
667	* Construct the full path for the file table entry
668	* and compare it with the specified file.
669	*/
670	char szName[RTPATH_MAX];
671	int rc = supR3HardenedMakeFilePath(pFile, szName, sizeof(szName), true /fWithFilename/, fFatal);
672	if (RT_FAILURE(rc))
673	return rc;
674	if (SUP_COMP_FILENAME(szName, pszFilename))
675	{
676	/*
677	* Normalize the two paths and compare again.
678	*/
679	rc = VERR_NOT_SAME_DEVICE;
680	#if defined(RT_OS_WINDOWS)
681	LPSTR pszIgnored;
682	char szName2[RTPATH_MAX];
683	if ( GetFullPathName(szName, RT_ELEMENTS(szName2), &szName2[0], &pszIgnored)
684	&& GetFullPathName(pszFilename, RT_ELEMENTS(szName), &szName[0], &pszIgnored))
685	if (!SUP_COMP_FILENAME(szName2, szName))
686	rc = VINF_SUCCESS;
687	#else
688	AssertCompile(RTPATH_MAX >= PATH_MAX);
689	char szName2[RTPATH_MAX];
690	if ( realpath(szName, szName2) != NULL
691	&& realpath(pszFilename, szName) != NULL)
692	if (!SUP_COMP_FILENAME(szName2, szName))
693	rc = VINF_SUCCESS;
694	#endif
695
696	if (RT_FAILURE(rc))
697	{
698	supR3HardenedMakeFilePath(pFile, szName, sizeof(szName), true /fWithFilename/, fFatal);
699	return supR3HardenedError(rc, fFatal,
700	"supR3HardenedVerifySameFile: \"%s\" isn't the same as \"%s\"\n",
701	pszFilename, szName);
702	}
703	}
704
705	/*
706	* Check more stuff like the stat info if it's an already open file?
707	*/
708
709
710
711	return VINF_SUCCESS;
712	}
713
714
715	/**
716	* Verifies a file.
717	*
718	* @returns VINF_SUCCESS on success.
719	* VERR_NOT_FOUND if the file isn't in the table, this isn't ever a fatal error.
720	* On verification failure, an error code will be returned when fFatal is clear,
721	* otherwise the program will be terminated.
722	*
723	* @param pszFilename The filename.
724	* @param fFatal Whether validation failures should be treated as
725	* fatal (true) or not (false).
726	*/
727	DECLHIDDEN(int) supR3HardenedVerifyFixedFile(const char *pszFilename, bool fFatal)
728	{
729	/*
730	* Lookup the file and check if it's the same file.
731	*/
732	const char *pszName = supR3HardenedPathFilename(pszFilename);
733	for (unsigned iFile = 0; iFile < RT_ELEMENTS(g_aSupInstallFiles); iFile++)
734	if (!SUP_COMP_FILENAME(pszName, g_aSupInstallFiles[iFile].pszFile))
735	{
736	int rc = supR3HardenedVerifySameFile(iFile, pszFilename, fFatal);
737	if (RT_SUCCESS(rc))
738	rc = supR3HardenedVerifyFileInternal(iFile, fFatal, false /* fLeaveFileOpen */);
739	return rc;
740	}
741
742	return VERR_NOT_FOUND;
743	}
744
745
746	/**
747	* Verifies a program, worker for supR3HardenedVerifyAll.
748	*
749	* @returns See supR3HardenedVerifyAll.
750	* @param pszProgName See supR3HardenedVerifyAll.
751	* @param fFatal See supR3HardenedVerifyAll.
752	*/
753	static int supR3HardenedVerifyProgram(const char *pszProgName, bool fFatal)
754	{
755	/*
756	* Search the table looking for the executable and the DLL/DYLIB/SO.
757	*/
758	int rc = VINF_SUCCESS;
759	bool fExe = false;
760	bool fDll = false;
761	size_t const cchProgName = suplibHardenedStrLen(pszProgName);
762	for (unsigned iFile = 0; iFile < RT_ELEMENTS(g_aSupInstallFiles); iFile++)
763	if (!suplibHardenedStrNCmp(pszProgName, g_aSupInstallFiles[iFile].pszFile, cchProgName))
764	{
765	if ( ( g_aSupInstallFiles[iFile].enmType == kSupIFT_Dll
766	\|\| g_aSupInstallFiles[iFile].enmType == kSupIFT_TestDll)
767	&& !suplibHardenedStrCmp(&g_aSupInstallFiles[iFile].pszFile[cchProgName], SUPLIB_DLL_SUFF))
768	{
769	/* This only has to be found (once). */
770	if (fDll)
771	rc = supR3HardenedError(VERR_INTERNAL_ERROR, fFatal,
772	"supR3HardenedVerifyProgram: duplicate DLL entry for \"%s\"\n", pszProgName);
773	fDll = true;
774	}
775	else if ( ( g_aSupInstallFiles[iFile].enmType == kSupIFT_Exe
776	\|\| g_aSupInstallFiles[iFile].enmType == kSupIFT_TestExe)
777	&& !suplibHardenedStrCmp(&g_aSupInstallFiles[iFile].pszFile[cchProgName], SUPLIB_EXE_SUFF))
778	{
779	/* Here we'll have to check that the specific program is the same as the entry. */
780	if (fExe)
781	rc = supR3HardenedError(VERR_INTERNAL_ERROR, fFatal,
782	"supR3HardenedVerifyProgram: duplicate EXE entry for \"%s\"\n", pszProgName);
783	fExe = true;
784
785	char szFilename[RTPATH_MAX];
786	int rc2 = supR3HardenedPathExecDir(szFilename, sizeof(szFilename) - cchProgName - sizeof(SUPLIB_EXE_SUFF));
787	if (RT_SUCCESS(rc2))
788	{
789	suplibHardenedStrCat(szFilename, "/");
790	suplibHardenedStrCat(szFilename, g_aSupInstallFiles[iFile].pszFile);
791	supR3HardenedVerifySameFile(iFile, szFilename, fFatal);
792	}
793	else
794	rc = supR3HardenedError(rc2, fFatal,
795	"supR3HardenedVerifyProgram: failed to query program path: rc=%d\n", rc2);
796	}
797	}
798
799	/*
800	* Check the findings.
801	*/
802	if (!fDll && !fExe)
803	rc = supR3HardenedError(VERR_NOT_FOUND, fFatal,
804	"supR3HardenedVerifyProgram: Couldn't find the program \"%s\"\n", pszProgName);
805	else if (!fExe)
806	rc = supR3HardenedError(VERR_NOT_FOUND, fFatal,
807	"supR3HardenedVerifyProgram: Couldn't find the EXE entry for \"%s\"\n", pszProgName);
808	else if (!fDll)
809	rc = supR3HardenedError(VERR_NOT_FOUND, fFatal,
810	"supR3HardenedVerifyProgram: Couldn't find the DLL entry for \"%s\"\n", pszProgName);
811	return rc;
812	}
813
814
815	/**
816	* Verifies all the known files.
817	*
818	* @returns VINF_SUCCESS on success.
819	* On verification failure, an error code will be returned when fFatal is clear,
820	* otherwise the program will be terminated.
821	*
822	* @param fFatal Whether validation failures should be treated as
823	* fatal (true) or not (false).
824	* @param fLeaveFilesOpen If set, all the verified files are left open.
825	* @param pszProgName Optional program name. This is used by SUPR3HardenedMain
826	* to verify that both the executable and corresponding
827	* DLL/DYLIB/SO are valid.
828	*/
829	DECLHIDDEN(int) supR3HardenedVerifyAll(bool fFatal, bool fLeaveFilesOpen, const char *pszProgName)
830	{
831	/*
832	* The verify all the files.
833	*/
834	int rc = VINF_SUCCESS;
835	for (unsigned iFile = 0; iFile < RT_ELEMENTS(g_aSupInstallFiles); iFile++)
836	{
837	int rc2 = supR3HardenedVerifyFileInternal(iFile, fFatal, fLeaveFilesOpen);
838	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
839	rc = rc2;
840	}
841
842	/*
843	* Verify the program name if specified, that is to say, just check that
844	* it's in the table (=> we've already verified it).
845	*/
846	if (pszProgName)
847	{
848	int rc2 = supR3HardenedVerifyProgram(pszProgName, fFatal);
849	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
850	rc2 = rc;
851	}
852
853	return rc;
854	}
855
856
857	/**
858	* Copies the N messages into the error buffer and returns @a rc.
859	*
860	* @returns Returns @a rc
861	* @param rc The return code.
862	* @param pErrInfo The error info structure.
863	* @param cMsgs The number of messages in the ellipsis.
864	* @param ... Message parts.
865	*/
866	static int supR3HardenedSetErrorN(int rc, PRTERRINFO pErrInfo, unsigned cMsgs, ...)
867	{
868	if (pErrInfo)
869	{
870	size_t cbErr = pErrInfo->cbMsg;
871	char *pszErr = pErrInfo->pszMsg;
872
873	va_list va;
874	va_start(va, cMsgs);
875	while (cMsgs-- > 0 && cbErr > 0)
876	{
877	const char pszMsg = va_arg(va, const char );
878	size_t cchMsg = VALID_PTR(pszMsg) ? suplibHardenedStrLen(pszMsg) : 0;
879	if (cchMsg >= cbErr)
880	cchMsg = cbErr - 1;
881	suplibHardenedMemCopy(pszErr, pszMsg, cchMsg);
882	pszErr[cchMsg] = '\0';
883	pszErr += cchMsg;
884	cbErr -= cchMsg;
885	}
886	va_end(va);
887
888	pErrInfo->rc = rc;
889	pErrInfo->fFlags \|= RTERRINFO_FLAGS_SET;
890	}
891
892	return rc;
893	}
894
895
896	/**
897	* Copies the three messages into the error buffer and returns @a rc.
898	*
899	* @returns Returns @a rc
900	* @param rc The return code.
901	* @param pErrInfo The error info structure.
902	* @param pszMsg1 The first message part.
903	* @param pszMsg2 The second message part.
904	* @param pszMsg3 The third message part.
905	*/
906	static int supR3HardenedSetError3(int rc, PRTERRINFO pErrInfo, const char *pszMsg1,
907	const char pszMsg2, const char pszMsg3)
908	{
909	return supR3HardenedSetErrorN(rc, pErrInfo, 3, pszMsg1, pszMsg2, pszMsg3);
910	}
911
912	#ifdef SOME_UNUSED_FUNCTION
913
914	/**
915	* Copies the two messages into the error buffer and returns @a rc.
916	*
917	* @returns Returns @a rc
918	* @param rc The return code.
919	* @param pErrInfo The error info structure.
920	* @param pszMsg1 The first message part.
921	* @param pszMsg2 The second message part.
922	*/
923	static int supR3HardenedSetError2(int rc, PRTERRINFO pErrInfo, const char *pszMsg1,
924	const char *pszMsg2)
925	{
926	return supR3HardenedSetErrorN(rc, pErrInfo, 2, pszMsg1, pszMsg2);
927	}
928
929
930	/**
931	* Copies the error message to the error buffer and returns @a rc.
932	*
933	* @returns Returns @a rc
934	* @param rc The return code.
935	* @param pErrInfo The error info structure.
936	* @param pszMsg The message.
937	*/
938	static int supR3HardenedSetError(int rc, PRTERRINFO pErrInfo, const char *pszMsg)
939	{
940	return supR3HardenedSetErrorN(rc, pErrInfo, 1, pszMsg);
941	}
942
943	#endif /* SOME_UNUSED_FUNCTION */
944
945	/**
946	* Output from a successfull supR3HardenedVerifyPathSanity call.
947	*/
948	typedef struct SUPR3HARDENEDPATHINFO
949	{
950	/** The length of the path in szCopy. */
951	uint16_t cch;
952	/** The number of path components. */
953	uint16_t cComponents;
954	/** Set if the path ends with slash, indicating that it's a directory
955	* reference and not a file reference. The slash has been removed from
956	* the copy. */
957	bool fDirSlash;
958	/** The offset where each path component starts, i.e. the char after the
959	* slash. The array has cComponents + 1 entries, where the final one is
960	* cch + 1 so that one can always terminate the current component by
961	* szPath[aoffComponent[i] - 1] = '\0'. */
962	uint16_t aoffComponents[32+1];
963	/** A normalized copy of the path.
964	* Reserve some extra space so we can be more relaxed about overflow
965	* checks and terminator paddings, especially when recursing. */
966	char szPath[SUPR3HARDENED_MAX_PATH * 2];
967	} SUPR3HARDENEDPATHINFO;
968	/** Pointer to a parsed path. */
969	typedef SUPR3HARDENEDPATHINFO *PSUPR3HARDENEDPATHINFO;
970
971
972	/**
973	* Verifies that the path is absolutely sane, it also parses the path.
974	*
975	* A sane path starts at the root (w/ drive letter on DOS derived systems) and
976	* does not have any relative bits (/../) or unnecessary slashes (/bin//ls).
977	* Sane paths are less or equal to SUPR3HARDENED_MAX_PATH bytes in length. UNC
978	* paths are not supported.
979	*
980	* @returns VBox status code.
981	* @param pszPath The path to check.
982	* @param pErrInfo The error info structure.
983	* @param pInfo Where to return a copy of the path along with
984	* parsing information.
985	*/
986	static int supR3HardenedVerifyPathSanity(const char *pszPath, PRTERRINFO pErrInfo, PSUPR3HARDENEDPATHINFO pInfo)
987	{
988	const char *pszSrc = pszPath;
989	char *pszDst = pInfo->szPath;
990
991	/*
992	* Check that it's an absolute path and copy the volume/root specifier.
993	*/
994	#if defined(RT_OS_WINDOWS) \|\| defined(RT_OS_OS2)
995	if ( !RT_C_IS_ALPHA(pszSrc[0])
996	\|\| pszSrc[1] != ':'
997	\|\| !RTPATH_IS_SLASH(pszSrc[2]))
998	return supR3HardenedSetError3(VERR_SUPLIB_PATH_NOT_ABSOLUTE, pErrInfo, "The path is not absolute: '", pszPath, "'");
999
1000	*pszDst++ = RT_C_TO_UPPER(pszSrc[0]);
1001	*pszDst++ = ':';
1002	*pszDst++ = RTPATH_SLASH;
1003	pszSrc += 3;
1004
1005	#else
1006	if (!RTPATH_IS_SLASH(pszSrc[0]))
1007	return supR3HardenedSetError3(VERR_SUPLIB_PATH_NOT_ABSOLUTE, pErrInfo, "The path is not absolute: '", pszPath, "'");
1008
1009	*pszDst++ = RTPATH_SLASH;
1010	pszSrc += 1;
1011	#endif
1012
1013	/*
1014	* No path specifying the root or something very shortly thereafter will
1015	* be approved of.
1016	*/
1017	if (pszSrc[0] == '\0')
1018	return supR3HardenedSetError3(VERR_SUPLIB_PATH_IS_ROOT, pErrInfo, "The path is root: '", pszPath, "'");
1019	if ( pszSrc[1] == '\0'
1020	\|\| pszSrc[2] == '\0')
1021	return supR3HardenedSetError3(VERR_SUPLIB_PATH_TOO_SHORT, pErrInfo, "The path is too short: '", pszPath, "'");
1022
1023	/*
1024	* Check each component. No parent references or double slashes.
1025	*/
1026	pInfo->cComponents = 0;
1027	pInfo->fDirSlash = false;
1028	while (pszSrc[0])
1029	{
1030	/* Sanity checks. */
1031	if (RTPATH_IS_SLASH(pszSrc[0])) /* can be relaxed if we care. */
1032	return supR3HardenedSetError3(VERR_SUPLIB_PATH_NOT_CLEAN, pErrInfo,
1033	"The path is not clean of double slashes: '", pszPath, "'");
1034	if ( pszSrc[0] == '.'
1035	&& pszSrc[1] == '.'
1036	&& RTPATH_IS_SLASH(pszSrc[2]))
1037	return supR3HardenedSetError3(VERR_SUPLIB_PATH_NOT_ABSOLUTE, pErrInfo,
1038	"The path is not absolute: '", pszPath, "'");
1039
1040	/* Record the start of the component. */
1041	if (pInfo->cComponents >= RT_ELEMENTS(pInfo->aoffComponents) - 1)
1042	return supR3HardenedSetError3(VERR_SUPLIB_PATH_TOO_MANY_COMPONENTS, pErrInfo,
1043	"The path has too many components: '", pszPath, "'");
1044	pInfo->aoffComponents[pInfo->cComponents++] = pszDst - &pInfo->szPath[0];
1045
1046	/* Traverse to the end of the component, copying it as we go along. */
1047	while (pszSrc[0])
1048	{
1049	if (RTPATH_IS_SLASH(pszSrc[0]))
1050	{
1051	pszSrc++;
1052	if (*pszSrc)
1053	*pszDst++ = RTPATH_SLASH;
1054	else
1055	pInfo->fDirSlash = true;
1056	break;
1057	}
1058	pszDst++ = pszSrc++;
1059	if ((uintptr_t)(pszDst - &pInfo->szPath[0]) >= SUPR3HARDENED_MAX_PATH)
1060	return supR3HardenedSetError3(VERR_SUPLIB_PATH_TOO_LONG, pErrInfo,
1061	"The path is too long: '", pszPath, "'");
1062	}
1063	}
1064
1065	/* Terminate the string and enter its length. */
1066	pszDst[0] = '\0';
1067	pszDst[1] = '\0'; /* for aoffComponents */
1068	pInfo->cch = (uint16_t)(pszDst - &pInfo->szPath[0]);
1069	pInfo->aoffComponents[pInfo->cComponents] = pInfo->cch + 1;
1070
1071	return VINF_SUCCESS;
1072	}
1073
1074
1075	/**
1076	* The state information collected by supR3HardenedVerifyFsObject.
1077	*
1078	* This can be used to verify that a directory we've opened for enumeration is
1079	* the same as the one that supR3HardenedVerifyFsObject just verified. It can
1080	* equally be used to verify a native specfied by the user.
1081	*/
1082	typedef struct SUPR3HARDENEDFSOBJSTATE
1083	{
1084	#ifdef RT_OS_WINDOWS
1085	/** Not implemented for windows yet. */
1086	char chTodo;
1087	#else
1088	/** The stat output. */
1089	struct stat Stat;
1090	#endif
1091	} SUPR3HARDENEDFSOBJSTATE;
1092	/** Pointer to a file system object state. */
1093	typedef SUPR3HARDENEDFSOBJSTATE *PSUPR3HARDENEDFSOBJSTATE;
1094	/** Pointer to a const file system object state. */
1095	typedef SUPR3HARDENEDFSOBJSTATE const *PCSUPR3HARDENEDFSOBJSTATE;
1096
1097
1098	/**
1099	* Query information about a file system object by path.
1100	*
1101	* @returns VBox status code, error buffer filled on failure.
1102	* @param pszPath The path to the object.
1103	* @param pFsObjState Where to return the state information.
1104	* @param pErrInfo The error info structure.
1105	*/
1106	static int supR3HardenedQueryFsObjectByPath(char const *pszPath, PSUPR3HARDENEDFSOBJSTATE pFsObjState, PRTERRINFO pErrInfo)
1107	{
1108	#if defined(RT_OS_WINDOWS)
1109	/** @todo Windows hardening. */
1110	pFsObjState->chTodo = 0;
1111	return VINF_SUCCESS;
1112
1113	#else
1114	/*
1115	* Stat the object, do not follow links.
1116	*/
1117	if (lstat(pszPath, &pFsObjState->Stat) != 0)
1118	{
1119	/* Ignore access errors */
1120	if (errno != EACCES)
1121	return supR3HardenedSetErrorN(VERR_SUPLIB_STAT_FAILED, pErrInfo,
1122	5, "stat failed with ", strerror(errno), " on: '", pszPath, "'");
1123	}
1124
1125	/*
1126	* Read ACLs.
1127	*/
1128	/** @todo */
1129
1130	return VINF_SUCCESS;
1131	#endif
1132	}
1133
1134
1135	/**
1136	* Query information about a file system object by native handle.
1137	*
1138	* @returns VBox status code, error buffer filled on failure.
1139	* @param hNative The native handle to the object @a pszPath
1140	* specifies and this should be verified to be the
1141	* same file system object.
1142	* @param pFsObjState Where to return the state information.
1143	* @param pszPath The path to the object. (For the error message
1144	* only.)
1145	* @param pErrInfo The error info structure.
1146	*/
1147	static int supR3HardenedQueryFsObjectByHandle(RTHCUINTPTR hNative, PSUPR3HARDENEDFSOBJSTATE pFsObjState,
1148	char const *pszPath, PRTERRINFO pErrInfo)
1149	{
1150	#if defined(RT_OS_WINDOWS)
1151	/** @todo Windows hardening. */
1152	pFsObjState->chTodo = 0;
1153	return VINF_SUCCESS;
1154
1155	#else
1156	/*
1157	* Stat the object, do not follow links.
1158	*/
1159	if (fstat((int)hNative, &pFsObjState->Stat) != 0)
1160	return supR3HardenedSetErrorN(VERR_SUPLIB_STAT_FAILED, pErrInfo,
1161	5, "fstat failed with ", strerror(errno), " on '", pszPath, "'");
1162
1163	/*
1164	* Read ACLs.
1165	*/
1166	/** @todo */
1167
1168	return VINF_SUCCESS;
1169	#endif
1170	}
1171
1172
1173	/**
1174	* Verifies that the file system object indicated by the native handle is the
1175	* same as the one @a pFsObjState indicates.
1176	*
1177	* @returns VBox status code, error buffer filled on failure.
1178	* @param pFsObjState1 File system object information/state by path.
1179	* @param pFsObjState2 File system object information/state by handle.
1180	* @param pszPath The path to the object @a pFsObjState
1181	* describes. (For the error message.)
1182	* @param pErrInfo The error info structure.
1183	*/
1184	static int supR3HardenedIsSameFsObject(PCSUPR3HARDENEDFSOBJSTATE pFsObjState1, PCSUPR3HARDENEDFSOBJSTATE pFsObjState2,
1185	const char *pszPath, PRTERRINFO pErrInfo)
1186	{
1187	#if defined(RT_OS_WINDOWS)
1188	/** @todo Windows hardening. */
1189	return VINF_SUCCESS;
1190
1191	#elif defined(RT_OS_OS2)
1192	return VINF_SUCCESS;
1193
1194	#else
1195	/*
1196	* Compare the ino+dev, then the uid+gid and finally the important mode
1197	* bits. Technically the first one should be enough, but we're paranoid.
1198	*/
1199	if ( pFsObjState1->Stat.st_ino != pFsObjState2->Stat.st_ino
1200	\|\| pFsObjState1->Stat.st_dev != pFsObjState2->Stat.st_dev)
1201	return supR3HardenedSetError3(VERR_SUPLIB_NOT_SAME_OBJECT, pErrInfo,
1202	"The native handle is not the same as '", pszPath, "' (ino/dev)");
1203	if ( pFsObjState1->Stat.st_uid != pFsObjState2->Stat.st_uid
1204	\|\| pFsObjState1->Stat.st_gid != pFsObjState2->Stat.st_gid)
1205	return supR3HardenedSetError3(VERR_SUPLIB_NOT_SAME_OBJECT, pErrInfo,
1206	"The native handle is not the same as '", pszPath, "' (uid/gid)");
1207	if ( (pFsObjState1->Stat.st_mode & (S_IFMT \| S_IWUSR \| S_IWGRP \| S_IWOTH))
1208	!= (pFsObjState2->Stat.st_mode & (S_IFMT \| S_IWUSR \| S_IWGRP \| S_IWOTH)))
1209	return supR3HardenedSetError3(VERR_SUPLIB_NOT_SAME_OBJECT, pErrInfo,
1210	"The native handle is not the same as '", pszPath, "' (mode)");
1211	return VINF_SUCCESS;
1212	#endif
1213	}
1214
1215
1216	/**
1217	* Verifies a file system object (file or directory).
1218	*
1219	* @returns VBox status code, error buffer filled on failure.
1220	* @param pFsObjState The file system object information/state to be
1221	* verified.
1222	* @param fDir Whether this is a directory or a file.
1223	* @param fRelaxed Whether we can be more relaxed about this
1224	* directory (only used for grand parent
1225	* directories).
1226	* @param pszPath The path to the object. For error messages and
1227	* securing a couple of hacks.
1228	* @param pErrInfo The error info structure.
1229	*/
1230	static int supR3HardenedVerifyFsObject(PCSUPR3HARDENEDFSOBJSTATE pFsObjState, bool fDir, bool fRelaxed,
1231	const char *pszPath, PRTERRINFO pErrInfo)
1232	{
1233	#if defined(RT_OS_WINDOWS)
1234	/** @todo Windows hardening. */
1235	NOREF(pFsObjState); NOREF(fDir); NOREF(fRelaxed); NOREF(pszPath); NOREF(pErrInfo);
1236	return VINF_SUCCESS;
1237
1238	#elif defined(RT_OS_OS2)
1239	/* No hardening here - it's a single user system. */
1240	NOREF(pFsObjState); NOREF(fDir); NOREF(fRelaxed); NOREF(pszPath); NOREF(pErrInfo);
1241	return VINF_SUCCESS;
1242
1243	#else
1244	/*
1245	* The owner must be root.
1246	*
1247	* This can be extended to include predefined system users if necessary.
1248	*/
1249	if (pFsObjState->Stat.st_uid != 0)
1250	return supR3HardenedSetError3(VERR_SUPLIB_OWNER_NOT_ROOT, pErrInfo, "The owner is not root: '", pszPath, "'");
1251
1252	/*
1253	* The object type must be directory or file, no symbolic links or other
1254	* risky stuff (sorry dude, but we're paranoid on purpose here).
1255	*/
1256	if ( !S_ISDIR(pFsObjState->Stat.st_mode)
1257	&& !S_ISREG(pFsObjState->Stat.st_mode))
1258	{
1259	if (S_ISLNK(pFsObjState->Stat.st_mode))
1260	return supR3HardenedSetError3(VERR_SUPLIB_SYMLINKS_ARE_NOT_PERMITTED, pErrInfo,
1261	"Symlinks are not permitted: '", pszPath, "'");
1262	return supR3HardenedSetError3(VERR_SUPLIB_NOT_DIR_NOT_FILE, pErrInfo,
1263	"Not regular file or directory: '", pszPath, "'");
1264	}
1265	if (fDir != !!S_ISDIR(pFsObjState->Stat.st_mode))
1266	{
1267	if (S_ISDIR(pFsObjState->Stat.st_mode))
1268	return supR3HardenedSetError3(VERR_SUPLIB_IS_DIRECTORY, pErrInfo,
1269	"Expected file but found directory: '", pszPath, "'");
1270	return supR3HardenedSetError3(VERR_SUPLIB_IS_FILE, pErrInfo,
1271	"Expected directory but found file: '", pszPath, "'");
1272	}
1273
1274	/*
1275	* The group does not matter if it does not have write access, if it has
1276	* write access it must be group 0 (root/wheel/whatever).
1277	*
1278	* This can be extended to include predefined system groups or groups that
1279	* only root is member of.
1280	*/
1281	if ( (pFsObjState->Stat.st_mode & S_IWGRP)
1282	&& pFsObjState->Stat.st_gid != 0)
1283	{
1284	#ifdef RT_OS_DARWIN
1285	/* HACK ALERT: On Darwin /Applications is root:admin with admin having
1286	full access. So, to work around we relax the hardening a bit and
1287	permit grand parents and beyond to be group writable by admin. */
1288	/** @todo dynamically resolve the admin group? */
1289	bool fBad = !fRelaxed \|\| pFsObjState->Stat.st_gid != 80 /admin/ \|\| suplibHardenedStrCmp(pszPath, "/Applications");
1290
1291	#elif defined(RT_OS_FREEBSD)
1292	/* HACK ALERT: PC-BSD 9 has group-writable /usr/pib directory which is
1293	similar to /Applications on OS X (see above).
1294	On FreeBSD root is normally the only member of this group, on
1295	PC-BSD the default user is a member. */
1296	/** @todo dynamically resolve the operator group? */
1297	bool fBad = !fRelaxed \|\| pFsObjState->Stat.st_gid != 5 /operator/ \|\| suplibHardenedStrCmp(pszPath, "/usr/pbi");
1298	NOREF(fRelaxed);
1299	#else
1300	NOREF(fRelaxed);
1301	bool fBad = true;
1302	#endif
1303	if (fBad)
1304	return supR3HardenedSetError3(VERR_SUPLIB_WRITE_NON_SYS_GROUP, pErrInfo,
1305	"The group is not a system group and it has write access to '", pszPath, "'");
1306	}
1307
1308	/*
1309	* World must not have write access. There is no relaxing this rule.
1310	*/
1311	if (pFsObjState->Stat.st_mode & S_IWOTH)
1312	return supR3HardenedSetError3(VERR_SUPLIB_WORLD_WRITABLE, pErrInfo,
1313	"World writable: '", pszPath, "'");
1314
1315	/*
1316	* Check the ACLs.
1317	*/
1318	/** @todo */
1319
1320	return VINF_SUCCESS;
1321	#endif
1322	}
1323
1324
1325	/**
1326	* Verifies that the file system object indicated by the native handle is the
1327	* same as the one @a pFsObjState indicates.
1328	*
1329	* @returns VBox status code, error buffer filled on failure.
1330	* @param hNative The native handle to the object @a pszPath
1331	* specifies and this should be verified to be the
1332	* same file system object.
1333	* @param pFsObjState The information/state returned by a previous
1334	* query call.
1335	* @param pszPath The path to the object @a pFsObjState
1336	* describes. (For the error message.)
1337	* @param pErrInfo The error info structure.
1338	*/
1339	static int supR3HardenedVerifySameFsObject(RTHCUINTPTR hNative, PCSUPR3HARDENEDFSOBJSTATE pFsObjState,
1340	const char *pszPath, PRTERRINFO pErrInfo)
1341	{
1342	SUPR3HARDENEDFSOBJSTATE FsObjState2;
1343	int rc = supR3HardenedQueryFsObjectByHandle(hNative, &FsObjState2, pszPath, pErrInfo);
1344	if (RT_SUCCESS(rc))
1345	rc = supR3HardenedIsSameFsObject(pFsObjState, &FsObjState2, pszPath, pErrInfo);
1346	return rc;
1347	}
1348
1349
1350	/**
1351	* Does the recursive directory enumeration.
1352	*
1353	* @returns VBox status code, error buffer filled on failure.
1354	* @param pszDirPath The path buffer containing the subdirectory to
1355	* enumerate followed by a slash (this is never
1356	* the root slash). The buffer is RTPATH_MAX in
1357	* size and anything starting at @a cchDirPath
1358	* - 1 and beyond is scratch space.
1359	* @param cchDirPath The length of the directory path + slash.
1360	* @param pFsObjState Pointer to the file system object state buffer.
1361	* On input this will hold the stats for
1362	* the directory @a pszDirPath indicates and will
1363	* be used to verified that we're opening the same
1364	* thing.
1365	* @param fRecursive Whether to recurse into subdirectories.
1366	* @param pErrInfo The error info structure.
1367	*/
1368	static int supR3HardenedVerifyDirRecursive(char *pszDirPath, size_t cchDirPath, PSUPR3HARDENEDFSOBJSTATE pFsObjState,
1369	bool fRecursive, PRTERRINFO pErrInfo)
1370	{
1371	#if defined(RT_OS_WINDOWS)
1372	/** @todo Windows hardening. */
1373	return VINF_SUCCESS;
1374
1375	#elif defined(RT_OS_OS2)
1376	/* No hardening here - it's a single user system. */
1377	return VINF_SUCCESS;
1378
1379	#else
1380	/*
1381	* Open the directory. Now, we could probably eliminate opendir here
1382	* and go down on kernel API level (open + getdents for instance), however
1383	* that's not very portable and hopefully not necessary.
1384	*/
1385	DIR *pDir = opendir(pszDirPath);
1386	if (!pDir)
1387	{
1388	/* Ignore access errors. */
1389	if (errno == EACCES)
1390	return VINF_SUCCESS;
1391	return supR3HardenedSetErrorN(VERR_SUPLIB_DIR_ENUM_FAILED, pErrInfo,
1392	5, "opendir failed with ", strerror(errno), " on '", pszDirPath, "'");
1393	}
1394	if (dirfd(pDir) != -1)
1395	{
1396	int rc = supR3HardenedVerifySameFsObject(dirfd(pDir), pFsObjState, pszDirPath, pErrInfo);
1397	if (RT_FAILURE(rc))
1398	{
1399	closedir(pDir);
1400	return rc;
1401	}
1402	}
1403
1404	/*
1405	* Enumerate the directory, check all the requested bits.
1406	*/
1407	int rc = VINF_SUCCESS;
1408	for (;;)
1409	{
1410	pszDirPath[cchDirPath] = '\0'; /* for error messages. */
1411
1412	struct dirent Entry;
1413	struct dirent *pEntry;
1414	int iErr = readdir_r(pDir, &Entry, &pEntry);
1415	if (iErr)
1416	{
1417	rc = supR3HardenedSetErrorN(VERR_SUPLIB_DIR_ENUM_FAILED, pErrInfo,
1418	5, "readdir_r failed with ", strerror(iErr), " in '", pszDirPath, "'");
1419	break;
1420	}
1421	if (!pEntry)
1422	break;
1423
1424	/*
1425	* Check the length and copy it into the path buffer so it can be
1426	* stat()'ed.
1427	*/
1428	size_t cchName = suplibHardenedStrLen(pEntry->d_name);
1429	if (cchName + cchDirPath > SUPR3HARDENED_MAX_PATH)
1430	{
1431	rc = supR3HardenedSetErrorN(VERR_SUPLIB_PATH_TOO_LONG, pErrInfo,
1432	4, "Path grew too long during recursion: '", pszDirPath, pEntry->d_name, "'");
1433	break;
1434	}
1435	suplibHardenedMemCopy(&pszDirPath[cchName], pEntry->d_name, cchName + 1);
1436
1437	/*
1438	* Query the information about the entry and verify it.
1439	* (We don't bother skipping '.' and '..' at this point, a little bit
1440	* of extra checks doesn't hurt and neither requires relaxed handling.)
1441	*/
1442	rc = supR3HardenedQueryFsObjectByPath(pszDirPath, pFsObjState, pErrInfo);
1443	if (RT_SUCCESS(rc))
1444	break;
1445	rc = supR3HardenedVerifyFsObject(pFsObjState, S_ISDIR(pFsObjState->Stat.st_mode), false /fRelaxed/,
1446	pszDirPath, pErrInfo);
1447	if (RT_FAILURE(rc))
1448	break;
1449
1450	/*
1451	* Recurse into subdirectories if requested.
1452	*/
1453	if ( fRecursive
1454	&& S_ISDIR(pFsObjState->Stat.st_mode)
1455	&& suplibHardenedStrCmp(pEntry->d_name, ".")
1456	&& suplibHardenedStrCmp(pEntry->d_name, ".."))
1457	{
1458	pszDirPath[cchDirPath + cchName] = RTPATH_SLASH;
1459	pszDirPath[cchDirPath + cchName + 1] = '\0';
1460
1461	rc = supR3HardenedVerifyDirRecursive(pszDirPath, cchDirPath + cchName + 1, pFsObjState,
1462	fRecursive, pErrInfo);
1463	if (RT_FAILURE(rc))
1464	break;
1465	}
1466	}
1467
1468	closedir(pDir);
1469	return VINF_SUCCESS;
1470	#endif
1471	}
1472
1473
1474	/**
1475	* Worker for SUPR3HardenedVerifyDir.
1476	*
1477	* @returns See SUPR3HardenedVerifyDir.
1478	* @param pszDirPath See SUPR3HardenedVerifyDir.
1479	* @param fRecursive See SUPR3HardenedVerifyDir.
1480	* @param fCheckFiles See SUPR3HardenedVerifyDir.
1481	* @param pErrInfo See SUPR3HardenedVerifyDir.
1482	*/
1483	DECLHIDDEN(int) supR3HardenedVerifyDir(const char *pszDirPath, bool fRecursive, bool fCheckFiles, PRTERRINFO pErrInfo)
1484	{
1485	/*
1486	* Validate the input path and parse it.
1487	*/
1488	SUPR3HARDENEDPATHINFO Info;
1489	int rc = supR3HardenedVerifyPathSanity(pszDirPath, pErrInfo, &Info);
1490	if (RT_FAILURE(rc))
1491	return rc;
1492
1493	/*
1494	* Verify each component from the root up.
1495	*/
1496	SUPR3HARDENEDFSOBJSTATE FsObjState;
1497	uint32_t const cComponents = Info.cComponents;
1498	for (uint32_t iComponent = 0; iComponent < cComponents; iComponent++)
1499	{
1500	bool fRelaxed = iComponent + 2 < cComponents;
1501	Info.szPath[Info.aoffComponents[iComponent + 1] - 1] = '\0';
1502	rc = supR3HardenedQueryFsObjectByPath(Info.szPath, &FsObjState, pErrInfo);
1503	if (RT_SUCCESS(rc))
1504	rc = supR3HardenedVerifyFsObject(&FsObjState, true /fDir/, fRelaxed, Info.szPath, pErrInfo);
1505	if (RT_FAILURE(rc))
1506	return rc;
1507	Info.szPath[Info.aoffComponents[iComponent + 1] - 1] = iComponent + 1 != cComponents ? RTPATH_SLASH : '\0';
1508	}
1509
1510	/*
1511	* Check files and subdirectories if requested.
1512	*/
1513	if (fCheckFiles \|\| fRecursive)
1514	{
1515	Info.szPath[Info.cch] = RTPATH_SLASH;
1516	Info.szPath[Info.cch + 1] = '\0';
1517	return supR3HardenedVerifyDirRecursive(Info.szPath, Info.cch + 1, &FsObjState,
1518	fRecursive, pErrInfo);
1519	}
1520
1521	return VINF_SUCCESS;
1522	}
1523
1524
1525	/**
1526	* Verfies a file.
1527	*
1528	* @returns VBox status code, error buffer filled on failure.
1529	* @param pszFilename The file to verify.
1530	* @param hNativeFile Handle to the file, verify that it's the same
1531	* as we ended up with when verifying the path.
1532	* RTHCUINTPTR_MAX means NIL here.
1533	* @param fMaybe3rdParty Set if the file is could be a supplied by a
1534	* third party. Different validation rules may
1535	* apply to 3rd party code on some platforms.
1536	* @param pErrInfo Where to return extended error information.
1537	* Optional.
1538	*/
1539	DECLHIDDEN(int) supR3HardenedVerifyFile(const char *pszFilename, RTHCUINTPTR hNativeFile,
1540	bool fMaybe3rdParty, PRTERRINFO pErrInfo)
1541	{
1542	/*
1543	* Validate the input path and parse it.
1544	*/
1545	SUPR3HARDENEDPATHINFO Info;
1546	int rc = supR3HardenedVerifyPathSanity(pszFilename, pErrInfo, &Info);
1547	if (RT_FAILURE(rc))
1548	return rc;
1549	if (Info.fDirSlash)
1550	return supR3HardenedSetError3(VERR_SUPLIB_IS_DIRECTORY, pErrInfo,
1551	"The file path specifies a directory: '", pszFilename, "'");
1552
1553	/*
1554	* Verify each component from the root up.
1555	*/
1556	SUPR3HARDENEDFSOBJSTATE FsObjState;
1557	uint32_t const cComponents = Info.cComponents;
1558	for (uint32_t iComponent = 0; iComponent < cComponents; iComponent++)
1559	{
1560	bool fFinal = iComponent + 1 == cComponents;
1561	bool fRelaxed = iComponent + 2 < cComponents;
1562	Info.szPath[Info.aoffComponents[iComponent + 1] - 1] = '\0';
1563	rc = supR3HardenedQueryFsObjectByPath(Info.szPath, &FsObjState, pErrInfo);
1564	if (RT_SUCCESS(rc))
1565	rc = supR3HardenedVerifyFsObject(&FsObjState, !fFinal /fDir/, fRelaxed, Info.szPath, pErrInfo);
1566	if (RT_FAILURE(rc))
1567	return rc;
1568	Info.szPath[Info.aoffComponents[iComponent + 1] - 1] = !fFinal ? RTPATH_SLASH : '\0';
1569	}
1570
1571	/*
1572	* Verify the file handle against the last component, if specified.
1573	*/
1574	if (hNativeFile != RTHCUINTPTR_MAX)
1575	{
1576	rc = supR3HardenedVerifySameFsObject(hNativeFile, &FsObjState, Info.szPath, pErrInfo);
1577	if (RT_FAILURE(rc))
1578	return rc;
1579	}
1580
1581	#ifdef RT_OS_WINDOWS
1582	/*
1583	* The files shall be signed on windows, verify that.
1584	*/
1585	rc = VINF_SUCCESS;
1586	HANDLE hVerify;
1587	if (hNativeFile == RTHCUINTPTR_MAX)
1588	{
1589	PRTUTF16 pwszPath;
1590	rc = RTStrToUtf16(pszFilename, &pwszPath);
1591	if (RT_SUCCESS(rc))
1592	{
1593	hVerify = CreateFileW(pwszPath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
1594	RTUtf16Free(pwszPath);
1595	}
1596	else
1597	rc = RTErrInfoSetF(pErrInfo, rc, "Error converting '%s' to UTF-16: %Rrc", pszFilename, rc);
1598	}
1599	else if (!DuplicateHandle(GetCurrentProcess(), (HANDLE)hNativeFile, GetCurrentProcess(), &hVerify,
1600	GENERIC_READ, false /bInheritHandle/, 0 /dwOptions/))
1601	hVerify = INVALID_HANDLE_VALUE;
1602	if (hVerify != INVALID_HANDLE_VALUE)
1603	{
1604	# ifdef VBOX_WITH_HARDENING
1605	uint32_t fFlags = SUPHNTVI_F_REQUIRE_KERNEL_CODE_SIGNING;
1606	if (!fMaybe3rdParty)
1607	fFlags = SUPHNTVI_F_REQUIRE_BUILD_CERT;
1608	const char *pszSuffix = RTPathSuffix(pszFilename);
1609	if ( pszSuffix
1610	&& pszSuffix[0] == '.'
1611	&& ( RT_C_TO_LOWER(pszSuffix[1]) == 'r'
1612	\|\| RT_C_TO_LOWER(pszSuffix[1]) == 'g')
1613	&& RT_C_TO_LOWER(pszSuffix[2]) == 'c'
1614	&& pszSuffix[3] == '\0' )
1615	fFlags \|= SUPHNTVI_F_RC_IMAGE;
1616	# ifndef IN_SUP_R3_STATIC /* Not in VBoxCpuReport and friends. */
1617	rc = supHardenedWinVerifyImageByHandleNoName(hVerify, fFlags, pErrInfo);
1618	# endif
1619	# endif
1620	CloseHandle(hVerify);
1621	}
1622	else if (RT_SUCCESS(rc))
1623	rc = RTErrInfoSetF(pErrInfo, RTErrConvertFromWin32(GetLastError()),
1624	"Error %u trying to open (or duplicate handle for) '%s'", GetLastError(), pszFilename);
1625	if (RT_FAILURE(rc))
1626	return rc;
1627	#endif
1628
1629	return VINF_SUCCESS;
1630	}
1631
1632
1633	/**
1634	* Gets the pre-init data for the hand-over to the other version
1635	* of this code.
1636	*
1637	* The reason why we pass this information on is that it contains
1638	* open directories and files. Later it may include even more info
1639	* (int the verified arrays mostly).
1640	*
1641	* The receiver is supR3HardenedRecvPreInitData.
1642	*
1643	* @param pPreInitData Where to store it.
1644	*/
1645	DECLHIDDEN(void) supR3HardenedGetPreInitData(PSUPPREINITDATA pPreInitData)
1646	{
1647	pPreInitData->cInstallFiles = RT_ELEMENTS(g_aSupInstallFiles);
1648	pPreInitData->paInstallFiles = &g_aSupInstallFiles[0];
1649	pPreInitData->paVerifiedFiles = &g_aSupVerifiedFiles[0];
1650
1651	pPreInitData->cVerifiedDirs = RT_ELEMENTS(g_aSupVerifiedDirs);
1652	pPreInitData->paVerifiedDirs = &g_aSupVerifiedDirs[0];
1653	}
1654
1655
1656	/**
1657	* Receives the pre-init data from the static executable stub.
1658	*
1659	* @returns VBox status code. Will not bitch on failure since the
1660	* runtime isn't ready for it, so that is left to the exe stub.
1661	*
1662	* @param pPreInitData The hand-over data.
1663	*/
1664	DECLHIDDEN(int) supR3HardenedRecvPreInitData(PCSUPPREINITDATA pPreInitData)
1665	{
1666	/*
1667	* Compare the array lengths and the contents of g_aSupInstallFiles.
1668	*/
1669	if ( pPreInitData->cInstallFiles != RT_ELEMENTS(g_aSupInstallFiles)
1670	\|\| pPreInitData->cVerifiedDirs != RT_ELEMENTS(g_aSupVerifiedDirs))
1671	return VERR_VERSION_MISMATCH;
1672	SUPINSTFILE const *paInstallFiles = pPreInitData->paInstallFiles;
1673	for (unsigned iFile = 0; iFile < RT_ELEMENTS(g_aSupInstallFiles); iFile++)
1674	if ( g_aSupInstallFiles[iFile].enmDir != paInstallFiles[iFile].enmDir
1675	\|\| g_aSupInstallFiles[iFile].enmType != paInstallFiles[iFile].enmType
1676	\|\| g_aSupInstallFiles[iFile].fOptional != paInstallFiles[iFile].fOptional
1677	\|\| suplibHardenedStrCmp(g_aSupInstallFiles[iFile].pszFile, paInstallFiles[iFile].pszFile))
1678	return VERR_VERSION_MISMATCH;
1679
1680	/*
1681	* Check that we're not called out of order.
1682	* If dynamic linking it screwed up, we may end up here.
1683	*/
1684	if ( ASMMemIsAll8(&g_aSupVerifiedFiles[0], sizeof(g_aSupVerifiedFiles), 0) != NULL
1685	\|\| ASMMemIsAll8(&g_aSupVerifiedDirs[0], sizeof(g_aSupVerifiedDirs), 0) != NULL)
1686	return VERR_WRONG_ORDER;
1687
1688	/*
1689	* Copy the verification data over.
1690	*/
1691	suplibHardenedMemCopy(&g_aSupVerifiedFiles[0], pPreInitData->paVerifiedFiles, sizeof(g_aSupVerifiedFiles));
1692	suplibHardenedMemCopy(&g_aSupVerifiedDirs[0], pPreInitData->paVerifiedDirs, sizeof(g_aSupVerifiedDirs));
1693	return VINF_SUCCESS;
1694	}

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source: vbox/trunk/src/VBox/HostDrivers/Support/SUPR3HardenedVerify.cpp@ 52004

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