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SUPHardenedVerifyImage-win.cpp @ 66525

Revision 66525, 127.0 KB checked in by vboxsync, 6 months ago (diff)
Windows hardening: bugref:8750: blacklist scrobj.dll
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1	/* $Id$ */
2	/** @file
3	* VirtualBox Support Library/Driver - Hardened Image Verification, Windows.
4	*/
5
6	/*
7	* Copyright (C) 2006-2016 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	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#ifdef IN_RING0
32	# define IPRT_NT_MAP_TO_ZW
33	# include <iprt/nt/nt.h>
34	# include <ntimage.h>
35	#else
36	# include <iprt/nt/nt-and-windows.h>
37	# include "Wintrust.h"
38	# include "Softpub.h"
39	# include "mscat.h"
40	# ifndef LOAD_LIBRARY_SEARCH_APPLICATION_DIR
41	# define LOAD_LIBRARY_SEARCH_SYSTEM32 0x800
42	# endif
43	#endif
44
45	#include <VBox/sup.h>
46	#include <VBox/err.h>
47	#include <iprt/ctype.h>
48	#include <iprt/ldr.h>
49	#include <iprt/log.h>
50	#include <iprt/path.h>
51	#include <iprt/string.h>
52	#include <iprt/crypto/pkcs7.h>
53	#include <iprt/crypto/store.h>
54
55	#ifdef IN_RING0
56	# include "SUPDrvInternal.h"
57	#else
58	# include "SUPLibInternal.h"
59	#endif
60	#include "win/SUPHardenedVerify-win.h"
61
62
63	/*********************************************************************************************************************************
64	* Defined Constants And Macros *
65	*********************************************************************************************************************************/
66	/** The size of static hash (output) buffers.
67	* Avoids dynamic allocations and cleanups for of small buffers as well as extra
68	* calls for getting the appropriate buffer size. The largest digest in regular
69	* use by current windows version is SHA-512, we double this and hope it's
70	* enough a good while. */
71	#define SUPHARDNTVI_MAX_CAT_HASH_SIZE 128
72
73
74	#if defined(VBOX_PERMIT_EVEN_MORE) && !defined(VBOX_PERMIT_MORE)
75	# error "VBOX_PERMIT_EVEN_MORE without VBOX_PERMIT_MORE!"
76	#endif
77
78
79	/*********************************************************************************************************************************
80	* Structures and Typedefs *
81	*********************************************************************************************************************************/
82
83	#ifdef IN_RING3
84	typedef LONG (WINAPI * PFNWINVERIFYTRUST)(HWND hwnd, GUID const *pgActionID, PVOID pWVTData);
85	typedef BOOL (WINAPI * PFNCRYPTCATADMINACQUIRECONTEXT)(HCATADMIN phCatAdmin, const GUID pGuidSubsystem, DWORD dwFlags);
86	typedef BOOL (WINAPI * PFNCRYPTCATADMINACQUIRECONTEXT2)(HCATADMIN phCatAdmin, const GUID pGuidSubsystem, PCWSTR pwszHashAlgorithm,
87	struct _CERT_STRONG_SIGN_PARA const *pStrongHashPolicy, DWORD dwFlags);
88	typedef BOOL (WINAPI * PFNCRYPTCATADMINCALCHASHFROMFILEHANDLE)(HANDLE hFile, DWORD pcbHash, BYTE pbHash, DWORD dwFlags);
89	typedef BOOL (WINAPI * PFNCRYPTCATADMINCALCHASHFROMFILEHANDLE2)(HCATADMIN hCatAdmin, HANDLE hFile, DWORD *pcbHash,
90	BYTE *pbHash, DWORD dwFlags);
91	typedef HCATINFO (WINAPI PFNCRYPTCATADMINENUMCATALOGFROMHASH)(HCATADMIN hCatAdmin, BYTE pbHash, DWORD cbHash,
92	DWORD dwFlags, HCATINFO *phPrevCatInfo);
93	typedef BOOL (WINAPI * PFNCRYPTCATADMINRELEASECATALOGCONTEXT)(HCATADMIN hCatAdmin, HCATINFO hCatInfo, DWORD dwFlags);
94	typedef BOOL (WINAPI * PFNCRYPTCATDADMINRELEASECONTEXT)(HCATADMIN hCatAdmin, DWORD dwFlags);
95	typedef BOOL (WINAPI * PFNCRYPTCATCATALOGINFOFROMCONTEXT)(HCATINFO hCatInfo, CATALOG_INFO *psCatInfo, DWORD dwFlags);
96
97	typedef HCERTSTORE (WINAPI *PFNCERTOPENSTORE)(PCSTR pszStoreProvider, DWORD dwEncodingType, HCRYPTPROV_LEGACY hCryptProv,
98	DWORD dwFlags, const void *pvParam);
99	typedef BOOL (WINAPI *PFNCERTCLOSESTORE)(HCERTSTORE hCertStore, DWORD dwFlags);
100	typedef PCCERT_CONTEXT (WINAPI *PFNCERTENUMCERTIFICATESINSTORE)(HCERTSTORE hCertStore, PCCERT_CONTEXT pPrevCertContext);
101
102	typedef NTSTATUS (WINAPI PFNBCRYPTOPENALGORTIHMPROVIDER)(BCRYPT_ALG_HANDLE phAlgo, PCWSTR pwszAlgoId,
103	PCWSTR pwszImpl, DWORD dwFlags);
104	#endif
105
106
107	/*********************************************************************************************************************************
108	* Global Variables *
109	*********************************************************************************************************************************/
110	/** The build certificate. */
111	static RTCRX509CERTIFICATE g_BuildX509Cert;
112
113	/** Store for root software publisher certificates. */
114	static RTCRSTORE g_hSpcRootStore = NIL_RTCRSTORE;
115	/** Store for root NT kernel certificates. */
116	static RTCRSTORE g_hNtKernelRootStore = NIL_RTCRSTORE;
117
118	/** Store containing SPC, NT kernel signing, and timestamp root certificates. */
119	static RTCRSTORE g_hSpcAndNtKernelRootStore = NIL_RTCRSTORE;
120	/** Store for supplemental certificates for use with
121	* g_hSpcAndNtKernelRootStore. */
122	static RTCRSTORE g_hSpcAndNtKernelSuppStore = NIL_RTCRSTORE;
123
124	/** The full \\SystemRoot\\System32 path. */
125	SUPSYSROOTDIRBUF g_System32NtPath;
126	/** The full \\SystemRoot\\WinSxS path. */
127	SUPSYSROOTDIRBUF g_WinSxSNtPath;
128	#if defined(IN_RING3) && !defined(VBOX_PERMIT_EVEN_MORE)
129	/** The full 'Program Files' path. */
130	SUPSYSROOTDIRBUF g_ProgramFilesNtPath;
131	# ifdef RT_ARCH_AMD64
132	/** The full 'Program Files (x86)' path. */
133	SUPSYSROOTDIRBUF g_ProgramFilesX86NtPath;
134	# endif
135	/** The full 'Common Files' path. */
136	SUPSYSROOTDIRBUF g_CommonFilesNtPath;
137	# ifdef RT_ARCH_AMD64
138	/** The full 'Common Files (x86)' path. */
139	SUPSYSROOTDIRBUF g_CommonFilesX86NtPath;
140	# endif
141	#endif /* IN_RING3 && !VBOX_PERMIT_MORE*/
142
143	/**
144	* Blacklisted DLL names.
145	*/
146	const RTSTRTUPLE g_aSupNtViBlacklistedDlls[] =
147	{
148	{ RT_STR_TUPLE("SCROBJ.dll") },
149	{ NULL, 0 } /* terminator entry */
150	};
151
152
153	static union
154	{
155	SID Sid;
156	uint8_t abPadding[SECURITY_MAX_SID_SIZE];
157	}
158	/** The TrustedInstaller SID (Vista+). */
159	g_TrustedInstallerSid,
160	/** Local system ID (S-1-5-21). */
161	g_LocalSystemSid,
162	/** Builtin Administrators group alias (S-1-5-32-544). */
163	g_AdminsGroupSid;
164
165
166	/** Set after we've retrived other SPC root certificates from the system. */
167	static bool g_fHaveOtherRoots = false;
168
169	#if defined(IN_RING3) && !defined(IN_SUP_HARDENED_R3)
170	/** Combined windows NT version number. See SUP_MAKE_NT_VER_COMBINED and
171	* SUP_MAKE_NT_VER_SIMPLE. */
172	uint32_t g_uNtVerCombined;
173	#endif
174
175	#ifdef IN_RING3
176	/** Timestamp hack working around issues with old DLLs that we ship.
177	* See supHardenedWinVerifyImageByHandle() for details. */
178	static uint64_t g_uBuildTimestampHack = 0;
179	#endif
180
181	#ifdef IN_RING3
182	/** Pointer to WinVerifyTrust. */
183	PFNWINVERIFYTRUST g_pfnWinVerifyTrust;
184	/** Pointer to CryptCATAdminAcquireContext. */
185	PFNCRYPTCATADMINACQUIRECONTEXT g_pfnCryptCATAdminAcquireContext;
186	/** Pointer to CryptCATAdminAcquireContext2 if available. */
187	PFNCRYPTCATADMINACQUIRECONTEXT2 g_pfnCryptCATAdminAcquireContext2;
188	/** Pointer to CryptCATAdminCalcHashFromFileHandle. */
189	PFNCRYPTCATADMINCALCHASHFROMFILEHANDLE g_pfnCryptCATAdminCalcHashFromFileHandle;
190	/** Pointer to CryptCATAdminCalcHashFromFileHandle2. */
191	PFNCRYPTCATADMINCALCHASHFROMFILEHANDLE2 g_pfnCryptCATAdminCalcHashFromFileHandle2;
192	/** Pointer to CryptCATAdminEnumCatalogFromHash. */
193	PFNCRYPTCATADMINENUMCATALOGFROMHASH g_pfnCryptCATAdminEnumCatalogFromHash;
194	/** Pointer to CryptCATAdminReleaseCatalogContext. */
195	PFNCRYPTCATADMINRELEASECATALOGCONTEXT g_pfnCryptCATAdminReleaseCatalogContext;
196	/** Pointer to CryptCATAdminReleaseContext. */
197	PFNCRYPTCATDADMINRELEASECONTEXT g_pfnCryptCATAdminReleaseContext;
198	/** Pointer to CryptCATCatalogInfoFromContext. */
199	PFNCRYPTCATCATALOGINFOFROMCONTEXT g_pfnCryptCATCatalogInfoFromContext;
200
201	/** Where we store the TLS entry for detecting WinVerifyTrustRecursion. */
202	static uint32_t g_iTlsWinVerifyTrustRecursion = UINT32_MAX;
203	/** Fallback WinVerifyTrust recursion protection. */
204	static uint32_t volatile g_idActiveThread = UINT32_MAX;
205
206	#endif
207
208
209	/*********************************************************************************************************************************
210	* Internal Functions *
211	*********************************************************************************************************************************/
212	#ifdef IN_RING3
213	static int supR3HardNtViCallWinVerifyTrust(HANDLE hFile, PCRTUTF16 pwszName, uint32_t fFlags, PRTERRINFO pErrInfo,
214	PFNWINVERIFYTRUST pfnWinVerifyTrust, HRESULT *phrcWinVerifyTrust);
215	static int supR3HardNtViCallWinVerifyTrustCatFile(HANDLE hFile, PCRTUTF16 pwszName, uint32_t fFlags, PRTERRINFO pErrInfo,
216	PFNWINVERIFYTRUST pfnWinVerifyTrust);
217	#endif
218
219
220
221
222	/** @copydoc RTLDRREADER::pfnRead */
223	static DECLCALLBACK(int) supHardNtViRdrRead(PRTLDRREADER pReader, void *pvBuf, size_t cb, RTFOFF off)
224	{
225	PSUPHNTVIRDR pNtViRdr = (PSUPHNTVIRDR)pReader;
226	Assert(pNtViRdr->Core.uMagic == RTLDRREADER_MAGIC);
227	NTSTATUS rcNt;
228
229	/* Check for type overflow (paranoia). */
230	if ((ULONG)cb != cb)
231	return VERR_OUT_OF_RANGE;
232
233	#ifdef IN_RING3
234	/* Make sure the event semaphore is reset (normally we don't use one). */
235	if (pNtViRdr->hEvent)
236	{
237	rcNt = NtClearEvent(pNtViRdr->hEvent);
238	if (!NT_SUCCESS(rcNt))
239	return RTErrConvertFromNtStatus(rcNt);
240	}
241	#endif
242
243	/* Perform the read. */
244	LARGE_INTEGER offNt;
245	offNt.QuadPart = off;
246
247	IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER;
248	rcNt = NtReadFile(pNtViRdr->hFile,
249	pNtViRdr->hEvent,
250	NULL /ApcRoutine/,
251	NULL /ApcContext/,
252	&Ios,
253	pvBuf,
254	(ULONG)cb,
255	&offNt,
256	NULL);
257
258	#ifdef IN_RING0
259	/* In ring-0 the handles shall be synchronized and not alertable. */
260	AssertMsg(rcNt == STATUS_SUCCESS \|\| !NT_SUCCESS(rcNt), ("%#x\n", rcNt));
261	#else
262	/* In ring-3 we like our handles synchronized and non-alertable, but we
263	sometimes have to take what we can get. So, deal with pending I/O as
264	best we can. */
265	if (rcNt == STATUS_PENDING)
266	rcNt = NtWaitForSingleObject(pNtViRdr->hEvent ? pNtViRdr->hEvent : pNtViRdr->hFile, FALSE /Alertable/, NULL);
267	#endif
268	if (NT_SUCCESS(rcNt))
269	rcNt = Ios.Status;
270	if (NT_SUCCESS(rcNt))
271	{
272	/* We require the caller to not read beyond the end of the file since
273	we don't have any way to communicate that we've read less that
274	requested. */
275	if (Ios.Information == cb)
276	{
277	pNtViRdr->off = off + cb; /* (just for show) */
278	return VINF_SUCCESS;
279	}
280	#ifdef IN_RING3
281	supR3HardenedError(VERR_READ_ERROR, false,
282	"supHardNtViRdrRead: Only got %#zx bytes when requesting %#zx bytes at %#llx in '%s'.\n",
283	Ios.Information, off, cb, pNtViRdr->szFilename);
284	#endif
285	}
286	pNtViRdr->off = -1;
287	return VERR_READ_ERROR;
288	}
289
290
291	/** @copydoc RTLDRREADER::pfnTell */
292	static DECLCALLBACK(RTFOFF) supHardNtViRdrTell(PRTLDRREADER pReader)
293	{
294	PSUPHNTVIRDR pNtViRdr = (PSUPHNTVIRDR)pReader;
295	Assert(pNtViRdr->Core.uMagic == RTLDRREADER_MAGIC);
296	return pNtViRdr->off;
297	}
298
299
300	/** @copydoc RTLDRREADER::pfnSize */
301	static DECLCALLBACK(RTFOFF) supHardNtViRdrSize(PRTLDRREADER pReader)
302	{
303	PSUPHNTVIRDR pNtViRdr = (PSUPHNTVIRDR)pReader;
304	Assert(pNtViRdr->Core.uMagic == RTLDRREADER_MAGIC);
305	return pNtViRdr->cbFile;
306	}
307
308
309	/** @copydoc RTLDRREADER::pfnLogName */
310	static DECLCALLBACK(const char *) supHardNtViRdrLogName(PRTLDRREADER pReader)
311	{
312	PSUPHNTVIRDR pNtViRdr = (PSUPHNTVIRDR)pReader;
313	return pNtViRdr->szFilename;
314	}
315
316
317	/** @copydoc RTLDRREADER::pfnMap */
318	static DECLCALLBACK(int) supHardNtViRdrMap(PRTLDRREADER pReader, const void **ppvBits)
319	{
320	RT_NOREF2(pReader, ppvBits);
321	return VERR_NOT_SUPPORTED;
322	}
323
324
325	/** @copydoc RTLDRREADER::pfnUnmap */
326	static DECLCALLBACK(int) supHardNtViRdrUnmap(PRTLDRREADER pReader, const void *pvBits)
327	{
328	RT_NOREF2(pReader, pvBits);
329	return VERR_NOT_SUPPORTED;
330	}
331
332
333	/** @copydoc RTLDRREADER::pfnDestroy */
334	static DECLCALLBACK(int) supHardNtViRdrDestroy(PRTLDRREADER pReader)
335	{
336	PSUPHNTVIRDR pNtViRdr = (PSUPHNTVIRDR)pReader;
337	Assert(pNtViRdr->Core.uMagic == RTLDRREADER_MAGIC);
338
339	pNtViRdr->Core.uMagic = ~RTLDRREADER_MAGIC;
340	pNtViRdr->hFile = NULL;
341	#ifdef IN_RING3
342	if (pNtViRdr->hEvent)
343	{
344	NtClose(pNtViRdr->hEvent);
345	pNtViRdr->hEvent = NULL;
346	}
347	#endif
348	RTMemFree(pNtViRdr);
349	return VINF_SUCCESS;
350	}
351
352
353	/**
354	* Creates a loader reader instance for the given NT file handle.
355	*
356	* @returns iprt status code.
357	* @param hFile Native NT file handle.
358	* @param pwszName Optional file name.
359	* @param fFlags Flags, SUPHNTVI_F_XXX.
360	* @param ppNtViRdr Where to store the reader instance on success.
361	*/
362	DECLHIDDEN(int) supHardNtViRdrCreate(HANDLE hFile, PCRTUTF16 pwszName, uint32_t fFlags, PSUPHNTVIRDR *ppNtViRdr)
363	{
364	/*
365	* Try determine the size of the file.
366	*/
367	IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER;
368	FILE_STANDARD_INFORMATION StdInfo;
369	NTSTATUS rcNt = NtQueryInformationFile(hFile, &Ios, &StdInfo, sizeof(StdInfo), FileStandardInformation);
370	if (!NT_SUCCESS(rcNt) \|\| !NT_SUCCESS(Ios.Status))
371	return VERR_LDRVI_FILE_LENGTH_ERROR;
372
373	/*
374	* Figure the file mode so we can see whether we'll be needing an event
375	* semaphore for waiting on reads. This may happen in very unlikely
376	* NtCreateSection scenarios.
377	*/
378	#if defined(IN_RING3) \|\| defined(VBOX_STRICT)
379	Ios.Status = STATUS_UNSUCCESSFUL;
380	ULONG fMode;
381	rcNt = NtQueryInformationFile(hFile, &Ios, &fMode, sizeof(fMode), FileModeInformation);
382	if (!NT_SUCCESS(rcNt) \|\| !NT_SUCCESS(Ios.Status))
383	return VERR_SUP_VP_FILE_MODE_ERROR;
384	#endif
385
386	HANDLE hEvent = NULL;
387	#ifdef IN_RING3
388	if (!(fMode & (FILE_SYNCHRONOUS_IO_NONALERT \| FILE_SYNCHRONOUS_IO_ALERT)))
389	{
390	rcNt = NtCreateEvent(&hEvent, EVENT_ALL_ACCESS, NULL, NotificationEvent, FALSE);
391	if (!NT_SUCCESS(rcNt))
392	return VERR_SUP_VP_CREATE_READ_EVT_SEM_FAILED;
393	}
394	#else
395	Assert(fMode & FILE_SYNCHRONOUS_IO_NONALERT);
396	#endif
397
398	/*
399	* Calc the file name length and allocate memory for the reader instance.
400	*/
401	size_t cchFilename = 0;
402	if (pwszName)
403	cchFilename = RTUtf16CalcUtf8Len(pwszName);
404
405	int rc = VERR_NO_MEMORY;
406	PSUPHNTVIRDR pNtViRdr = (PSUPHNTVIRDR)RTMemAllocZ(sizeof(*pNtViRdr) + cchFilename);
407	if (!pNtViRdr)
408	{
409	#ifdef IN_RING3
410	if (hEvent != NULL)
411	NtClose(hEvent);
412	#endif
413	return VERR_NO_MEMORY;
414	}
415
416	/*
417	* Initialize the structure.
418	*/
419	if (cchFilename)
420	{
421	char *pszName = &pNtViRdr->szFilename[0];
422	rc = RTUtf16ToUtf8Ex(pwszName, RTSTR_MAX, &pszName, cchFilename + 1, NULL);
423	AssertStmt(RT_SUCCESS(rc), pNtViRdr->szFilename[0] = '\0');
424	}
425	else
426	pNtViRdr->szFilename[0] = '\0';
427
428	pNtViRdr->Core.uMagic = RTLDRREADER_MAGIC;
429	pNtViRdr->Core.pfnRead = supHardNtViRdrRead;
430	pNtViRdr->Core.pfnTell = supHardNtViRdrTell;
431	pNtViRdr->Core.pfnSize = supHardNtViRdrSize;
432	pNtViRdr->Core.pfnLogName = supHardNtViRdrLogName;
433	pNtViRdr->Core.pfnMap = supHardNtViRdrMap;
434	pNtViRdr->Core.pfnUnmap = supHardNtViRdrUnmap;
435	pNtViRdr->Core.pfnDestroy = supHardNtViRdrDestroy;
436	pNtViRdr->hFile = hFile;
437	pNtViRdr->hEvent = hEvent;
438	pNtViRdr->off = 0;
439	pNtViRdr->cbFile = StdInfo.EndOfFile.QuadPart;
440	pNtViRdr->fFlags = fFlags;
441	*ppNtViRdr = pNtViRdr;
442	return VINF_SUCCESS;
443	}
444
445
446	/**
447	* Checks if the file is owned by TrustedInstaller (Vista+) or similar.
448	*
449	* @returns true if owned by TrustedInstaller of pre-Vista, false if not.
450	*
451	* @param hFile The handle to the file.
452	* @param pwszName The name of the file.
453	*/
454	static bool supHardNtViCheckIsOwnedByTrustedInstallerOrSimilar(HANDLE hFile, PCRTUTF16 pwszName)
455	{
456	if (g_uNtVerCombined < SUP_NT_VER_VISTA)
457	return true;
458
459	/*
460	* Get the ownership information.
461	*/
462	union
463	{
464	SECURITY_DESCRIPTOR_RELATIVE Rel;
465	SECURITY_DESCRIPTOR Abs;
466	uint8_t abView[256];
467	} uBuf;
468	ULONG cbActual;
469	NTSTATUS rcNt = NtQuerySecurityObject(hFile, OWNER_SECURITY_INFORMATION, &uBuf.Abs, sizeof(uBuf), &cbActual);
470	if (!NT_SUCCESS(rcNt))
471	{
472	SUP_DPRINTF(("NtQuerySecurityObject failed with rcNt=%#x on '%ls'\n", rcNt, pwszName));
473	return false;
474	}
475
476	/*
477	* Check the owner.
478	*
479	* Initially we wished to only allow TrustedInstaller. But a Windows CAPI
480	* plugin "Program Files\Tumbleweed\Desktop Validator\tmwdcapiclient.dll"
481	* turned up owned by the local system user, and we cannot operate without
482	* the plugin loaded once it's installed (WinVerityTrust fails).
483	*
484	* We'd like to avoid allowing Builtin\Administrators here since it's the
485	* default owner of anything an admin user creates (at least when elevated).
486	* Seems windows update or someone ends up installing or modifying system
487	* DLL ownership to this group, so for system32 and winsxs it's unavoidable.
488	* And, not surprise, a bunch of products, including AV, firewalls and similar
489	* ends up with their files installed with this group as owner. For instance
490	* if we wish to have NAT continue working, we need to allow this.
491	*
492	* Hopefully, we can limit the allowed files to these owners though, so
493	* we won't be subject to ordinary (non-admin, or not elevated) users
494	* downloading or be tricked into putting evil DLLs around the place...
495	*/
496	PSID pOwner = uBuf.Rel.Control & SE_SELF_RELATIVE ? &uBuf.abView[uBuf.Rel.Owner] : uBuf.Abs.Owner;
497	Assert((uintptr_t)pOwner - (uintptr_t)&uBuf < sizeof(uBuf) - sizeof(SID));
498	if (RtlEqualSid(pOwner, &g_TrustedInstallerSid))
499	return true;
500	if (RtlEqualSid(pOwner, &g_LocalSystemSid))
501	return true;
502	if (RtlEqualSid(pOwner, &g_AdminsGroupSid))
503	{
504	SUP_DPRINTF(("%ls: Owner is administrators group.\n", pwszName));
505	return true;
506	}
507
508	SUP_DPRINTF(("%ls: Owner is not trusted installer (%.*Rhxs)\n",
509	pwszName, ((uint8_t )pOwner)[1] /SubAuthorityCount/ sizeof(ULONG) + 8, pOwner));
510	RT_NOREF1(pwszName);
511	return false;
512	}
513
514
515	/**
516	* Simple case insensitive UTF-16 / ASCII path compare.
517	*
518	* @returns true if equal, false if not.
519	* @param pawcLeft The UTF-16 path string, not necessarily null
520	* terminated.
521	* @param cwcLeft The number of chars in the left string,
522	* RTSTR_MAX if unknown but terminated.
523	* @param pszRight The ascii string.
524	*/
525	DECLHIDDEN(bool) supHardViUtf16PathIsEqualEx(PCRTUTF16 pawcLeft, size_t cwcLeft, const char *pszRight)
526	{
527	for (;;)
528	{
529	RTUTF16 wc;
530	if (cwcLeft-- > 0)
531	wc =*pawcLeft++;
532	else
533	wc = 0;
534	uint8_t b = *pszRight++;
535	if (b != wc)
536	{
537	if (wc >= 0x80)
538	return false;
539	wc = RT_C_TO_LOWER(wc);
540	if (wc != b)
541	{
542	b = RT_C_TO_LOWER(b);
543	if (wc != b)
544	{
545	if (wc == '/')
546	wc = '\\';
547	if (b == '/')
548	b = '\\';
549	if (wc != b)
550	return false;
551	}
552	}
553	}
554	if (!b)
555	return true;
556	}
557	}
558
559
560	/**
561	* Simple case insensitive UTF-16 / ASCII path compare.
562	*
563	* @returns true if equal, false if not.
564	* @param pwszLeft The UTF-16 path string.
565	* @param pszRight The ascii string.
566	*/
567	static bool supHardViUtf16PathIsEqual(PCRTUTF16 pwszLeft, const char *pszRight)
568	{
569	return supHardViUtf16PathIsEqualEx(pwszLeft, RTSTR_MAX, pszRight);
570	}
571
572
573	#if 0 /* unused */
574	/**
575	* Simple case insensitive UTF-16 / ASCII ends-with path predicate.
576	*
577	* @returns true if equal, false if not.
578	* @param pwsz The UTF-16 path string.
579	* @param pszSuffix The ascii suffix string.
580	*/
581	static bool supHardViUtf16PathEndsWith(PCRTUTF16 pwsz, const char *pszSuffix)
582	{
583	size_t cwc = RTUtf16Len(pwsz);
584	size_t cchSuffix = strlen(pszSuffix);
585	if (cwc >= cchSuffix)
586	return supHardViUtf16PathIsEqual(pwsz + cwc - cchSuffix, pszSuffix);
587	return false;
588	}
589	#endif
590
591
592	/**
593	* Simple case insensitive UTF-16 / ASCII starts-with path predicate.
594	*
595	* @returns true if starts with given string, false if not.
596	* @param pwszLeft The UTF-16 path string.
597	* @param pszRight The ascii prefix string.
598	*/
599	static bool supHardViUtf16PathStartsWithAscii(PCRTUTF16 pwszLeft, const char *pszRight)
600	{
601	for (;;)
602	{
603	RTUTF16 wc = *pwszLeft++;
604	uint8_t b = *pszRight++;
605	if (b != wc)
606	{
607	if (!b)
608	return true;
609	if (wc >= 0x80 \|\| wc == 0)
610	return false;
611	wc = RT_C_TO_LOWER(wc);
612	if (wc != b)
613	{
614	b = RT_C_TO_LOWER(b);
615	if (wc != b)
616	{
617	if (wc == '/')
618	wc = '\\';
619	if (b == '/')
620	b = '\\';
621	if (wc != b)
622	return false;
623	}
624	}
625	}
626	}
627	}
628
629
630	/**
631	* Simple case insensitive UNICODE_STRING starts-with path predicate.
632	*
633	* @returns true if starts with given string, false if not.
634	* @param pwszLeft The path to check.
635	* @param cwcLeft The length of @a pwszLeft
636	* @param pwszRight The starts-with path.
637	* @param cwcRight The length of @a pwszRight.
638	* @param fCheckSlash Check for a slash following the prefix.
639	*/
640	DECLHIDDEN(bool) supHardViUtf16PathStartsWithEx(PCRTUTF16 pwszLeft, uint32_t cwcLeft,
641	PCRTUTF16 pwszRight, uint32_t cwcRight, bool fCheckSlash)
642	{
643	if (cwcLeft < cwcRight \|\| !cwcRight \|\| !pwszRight)
644	return false;
645
646	/* See if we can get away with a case sensitive compare first. */
647	if (memcmp(pwszLeft, pwszRight, cwcRight * sizeof(RTUTF16)) == 0)
648	pwszLeft += cwcRight;
649	else
650	{
651	/* No luck, do a slow case insensitive comapre. */
652	uint32_t cLeft = cwcRight;
653	while (cLeft-- > 0)
654	{
655	RTUTF16 wcLeft = *pwszLeft++;
656	RTUTF16 wcRight = *pwszRight++;
657	if (wcLeft != wcRight)
658	{
659	wcLeft = wcLeft < 0x80 ? wcLeft == '/' ? '\\' : RT_C_TO_LOWER(wcLeft) : wcLeft;
660	wcRight = wcRight < 0x80 ? wcRight == '/' ? '\\' : RT_C_TO_LOWER(wcRight) : wcRight;
661	if (wcLeft != wcRight)
662	return false;
663	}
664	}
665	}
666
667	/* Check for slash following the prefix, if request. */
668	if ( !fCheckSlash
669	\|\| *pwszLeft == '\\'
670	\|\| *pwszLeft == '/')
671	return true;
672	return false;
673	}
674
675
676	/**
677	* Simple case insensitive UNICODE_STRING starts-with path predicate.
678	*
679	* @returns true if starts with given string, false if not.
680	* @param pUniStrLeft The path to check.
681	* @param pUniStrRight The starts-with path.
682	* @param fCheckSlash Check for a slash following the prefix.
683	*/
684	DECLHIDDEN(bool) supHardViUniStrPathStartsWithUniStr(UNICODE_STRING const pUniStrLeft, UNICODE_STRING const pUniStrRight,
685	bool fCheckSlash)
686	{
687	return supHardViUtf16PathStartsWithEx(pUniStrLeft->Buffer, pUniStrLeft->Length / sizeof(WCHAR),
688	pUniStrRight->Buffer, pUniStrRight->Length / sizeof(WCHAR), fCheckSlash);
689	}
690
691
692	#ifndef IN_RING0
693	/**
694	* Counts slashes in the given UTF-8 path string.
695	*
696	* @returns Number of slashes.
697	* @param pwsz The UTF-16 path string.
698	*/
699	static uint32_t supHardViUtf16PathCountSlashes(PCRTUTF16 pwsz)
700	{
701	uint32_t cSlashes = 0;
702	RTUTF16 wc;
703	while ((wc = *pwsz++) != '\0')
704	if (wc == '/' \|\| wc == '\\')
705	cSlashes++;
706	return cSlashes;
707	}
708	#endif
709
710
711	#ifdef VBOX_PERMIT_MORE
712	/**
713	* Checks if the path goes into %windir%\apppatch\.
714	*
715	* @returns true if apppatch, false if not.
716	* @param pwszPath The path to examine.
717	*/
718	DECLHIDDEN(bool) supHardViIsAppPatchDir(PCRTUTF16 pwszPath, uint32_t cwcName)
719	{
720	uint32_t cwcWinDir = (g_System32NtPath.UniStr.Length - sizeof(L"System32")) / sizeof(WCHAR);
721
722	if (cwcName <= cwcWinDir + sizeof("AppPatch"))
723	return false;
724
725	if (memcmp(pwszPath, g_System32NtPath.UniStr.Buffer, cwcWinDir * sizeof(WCHAR)))
726	return false;
727
728	if (!supHardViUtf16PathStartsWithAscii(&pwszPath[cwcWinDir], "\\AppPatch\\"))
729	return false;
730
731	return g_uNtVerCombined >= SUP_NT_VER_VISTA;
732	}
733	#else
734	# error should not get here..
735	#endif
736
737
738
739	/**
740	* Checks if the unsigned DLL is fine or not.
741	*
742	* @returns VINF_LDRVI_NOT_SIGNED or @a rc.
743	* @param hLdrMod The loader module handle.
744	* @param pwszName The NT name of the DLL/EXE.
745	* @param fFlags Flags.
746	* @param hFile The file handle.
747	* @param rc The status code..
748	*/
749	static int supHardNtViCheckIfNotSignedOk(RTLDRMOD hLdrMod, PCRTUTF16 pwszName, uint32_t fFlags, HANDLE hFile, int rc)
750	{
751	RT_NOREF1(hLdrMod);
752
753	if (fFlags & (SUPHNTVI_F_REQUIRE_BUILD_CERT \| SUPHNTVI_F_REQUIRE_KERNEL_CODE_SIGNING))
754	return rc;
755
756	/*
757	* Version macros.
758	*/
759	uint32_t const uNtVer = g_uNtVerCombined;
760	#define IS_XP() ( uNtVer >= SUP_MAKE_NT_VER_SIMPLE(5, 1) && uNtVer < SUP_MAKE_NT_VER_SIMPLE(5, 2) )
761	#define IS_W2K3() ( uNtVer >= SUP_MAKE_NT_VER_SIMPLE(5, 2) && uNtVer < SUP_MAKE_NT_VER_SIMPLE(5, 3) )
762	#define IS_VISTA() ( uNtVer >= SUP_MAKE_NT_VER_SIMPLE(6, 0) && uNtVer < SUP_MAKE_NT_VER_SIMPLE(6, 1) )
763	#define IS_W70() ( uNtVer >= SUP_MAKE_NT_VER_SIMPLE(6, 1) && uNtVer < SUP_MAKE_NT_VER_SIMPLE(6, 2) )
764	#define IS_W80() ( uNtVer >= SUP_MAKE_NT_VER_SIMPLE(6, 2) && uNtVer < SUP_MAKE_NT_VER_SIMPLE(6, 3) )
765	#define IS_W81() ( uNtVer >= SUP_MAKE_NT_VER_SIMPLE(6, 3) && uNtVer < SUP_MAKE_NT_VER_SIMPLE(6, 4) )
766
767	/*
768	* The System32 directory.
769	*
770	* System32 is full of unsigned DLLs shipped by microsoft, graphics
771	* hardware vendors, input device/method vendors and whatnot else that
772	* actually needs to be loaded into a process for it to work correctly.
773	* We have to ASSUME that anything our process attempts to load from
774	* System32 is trustworthy and that the Windows system with the help of
775	* anti-virus software make sure there is nothing evil lurking in System32
776	* or being loaded from it.
777	*
778	* A small measure of protection is to list DLLs we know should be signed
779	* and decline loading unsigned versions of them, assuming they have been
780	* replaced by an adversary with evil intentions.
781	*/
782	PCRTUTF16 pwsz;
783	uint32_t cwcName = (uint32_t)RTUtf16Len(pwszName);
784	uint32_t cwcOther = g_System32NtPath.UniStr.Length / sizeof(WCHAR);
785	if (supHardViUtf16PathStartsWithEx(pwszName, cwcName, g_System32NtPath.UniStr.Buffer, cwcOther, true /fCheckSlash/))
786	{
787	pwsz = pwszName + cwcOther + 1;
788
789	/* Must be owned by trusted installer. (This test is superfuous, thus no relaxation here.) */
790	if ( !(fFlags & SUPHNTVI_F_TRUSTED_INSTALLER_OWNER)
791	&& !supHardNtViCheckIsOwnedByTrustedInstallerOrSimilar(hFile, pwszName))
792	return rc;
793
794	/* Core DLLs. */
795	if (supHardViUtf16PathIsEqual(pwsz, "ntdll.dll"))
796	return uNtVer < SUP_NT_VER_VISTA ? VINF_LDRVI_NOT_SIGNED : rc;
797	if (supHardViUtf16PathIsEqual(pwsz, "kernel32.dll"))
798	return uNtVer < SUP_NT_VER_W81 ? VINF_LDRVI_NOT_SIGNED : rc;
799	if (supHardViUtf16PathIsEqual(pwsz, "kernelbase.dll"))
800	return IS_W80() \|\| IS_W70() ? VINF_LDRVI_NOT_SIGNED : rc;
801	if (supHardViUtf16PathIsEqual(pwsz, "apisetschema.dll"))
802	return IS_W70() ? VINF_LDRVI_NOT_SIGNED : rc;
803	if (supHardViUtf16PathIsEqual(pwsz, "apphelp.dll"))
804	return VINF_LDRVI_NOT_SIGNED; /* So far, never signed... */
805	#ifdef VBOX_PERMIT_VERIFIER_DLL
806	if (supHardViUtf16PathIsEqual(pwsz, "verifier.dll"))
807	return uNtVer < SUP_NT_VER_W81 ? VINF_LDRVI_NOT_SIGNED : rc;
808	#endif
809	#ifdef VBOX_PERMIT_MORE
810	if (uNtVer >= SUP_NT_VER_W70) /* hard limit: user32.dll is unwanted prior to w7. */
811	{
812	if (supHardViUtf16PathIsEqual(pwsz, "sfc.dll"))
813	return uNtVer < SUP_MAKE_NT_VER_SIMPLE(6, 4) ? VINF_LDRVI_NOT_SIGNED : rc;
814	if (supHardViUtf16PathIsEqual(pwsz, "sfc_os.dll"))
815	return uNtVer < SUP_MAKE_NT_VER_SIMPLE(6, 4) ? VINF_LDRVI_NOT_SIGNED : rc;
816	if (supHardViUtf16PathIsEqual(pwsz, "user32.dll"))
817	return uNtVer < SUP_NT_VER_W81 ? VINF_LDRVI_NOT_SIGNED : rc;
818	}
819	#endif
820
821	#ifndef IN_RING0
822	/* Check that this DLL isn't supposed to be signed on this windows
823	version. If it should, it's likely to be a fake. */
824	/** @todo list of signed dlls for various windows versions. */
825	return VINF_LDRVI_NOT_SIGNED;
826	#else
827	return rc;
828	#endif /* IN_RING0 */
829	}
830
831
832	#ifndef IN_RING0
833	/*
834	* The WinSxS white list.
835	*
836	* Just like with System32 there are potentially a number of DLLs that
837	* could be required from WinSxS.
838	*/
839	cwcOther = g_WinSxSNtPath.UniStr.Length / sizeof(WCHAR);
840	if (supHardViUtf16PathStartsWithEx(pwszName, cwcName, g_WinSxSNtPath.UniStr.Buffer, cwcOther, true /fCheckSlash/))
841	{
842	pwsz = pwszName + cwcOther + 1;
843	cwcName -= cwcOther + 1;
844
845	/* The WinSxS layout means everything worth loading is exactly one level down. */
846	uint32_t cSlashes = supHardViUtf16PathCountSlashes(pwsz);
847	if (cSlashes != 1)
848	return rc;
849
850	/* Must be owned by trusted installer. */
851	if ( !(fFlags & SUPHNTVI_F_TRUSTED_INSTALLER_OWNER)
852	&& !supHardNtViCheckIsOwnedByTrustedInstallerOrSimilar(hFile, pwszName))
853	return rc;
854	return VINF_LDRVI_NOT_SIGNED;
855	}
856	#endif /* !IN_RING0 */
857
858
859	#ifdef VBOX_PERMIT_MORE
860	/*
861	* AppPatch whitelist.
862	*/
863	if (supHardViIsAppPatchDir(pwszName, cwcName))
864	{
865	cwcOther = g_System32NtPath.UniStr.Length / sizeof(WCHAR); /* ASSUMES System32 is called System32. */
866	pwsz = pwszName + cwcOther + 1;
867
868	if ( !(fFlags & SUPHNTVI_F_TRUSTED_INSTALLER_OWNER)
869	&& !supHardNtViCheckIsOwnedByTrustedInstallerOrSimilar(hFile, pwszName))
870	return rc;
871
872	# ifndef VBOX_PERMIT_EVEN_MORE
873	if (supHardViUtf16PathIsEqual(pwsz, "acres.dll"))
874	return VINF_LDRVI_NOT_SIGNED;
875
876	# ifdef RT_ARCH_AMD64
877	if (supHardViUtf16PathIsEqual(pwsz, "AppPatch64\\AcGenral.dll"))
878	return VINF_LDRVI_NOT_SIGNED;
879	# elif defined(RT_ARCH_X86)
880	if (supHardViUtf16PathIsEqual(pwsz, "AcGenral.dll"))
881	return VINF_LDRVI_NOT_SIGNED;
882	# endif
883	# endif /* !VBOX_PERMIT_EVEN_MORE */
884
885	# ifdef IN_RING0
886	return rc;
887	# else
888	return VINF_LDRVI_NOT_SIGNED;
889	# endif
890	}
891	#endif /* VBOX_PERMIT_MORE */
892
893
894	#ifndef IN_RING0
895	# if defined(VBOX_PERMIT_MORE) && !defined(VBOX_PERMIT_EVEN_MORE)
896	/*
897	* Program files and common files.
898	* Permit anything that's signed and correctly installed.
899	*/
900	if ( supHardViUtf16PathStartsWithEx(pwszName, cwcName,
901	g_ProgramFilesNtPath.UniStr.Buffer, g_ProgramFilesNtPath.UniStr.Length,
902	true /fCheckSlash/)
903	\|\| supHardViUtf16PathStartsWithEx(pwszName, cwcName,
904	g_CommonFilesNtPath.UniStr.Buffer, g_CommonFilesNtPath.UniStr.Length,
905	true /fCheckSlash/)
906	# ifdef RT_ARCH_AMD64
907	\|\| supHardViUtf16PathStartsWithEx(pwszName, cwcName,
908	g_ProgramFilesX86NtPath.UniStr.Buffer, g_ProgramFilesX86NtPath.UniStr.Length,
909	true /fCheckSlash/)
910	\|\| supHardViUtf16PathStartsWithEx(pwszName, cwcName,
911	g_CommonFilesX86NtPath.UniStr.Buffer, g_CommonFilesX86NtPath.UniStr.Length,
912	true /fCheckSlash/)
913	# endif
914	)
915	{
916	if ( !(fFlags & SUPHNTVI_F_TRUSTED_INSTALLER_OWNER)
917	&& !supHardNtViCheckIsOwnedByTrustedInstallerOrSimilar(hFile, pwszName))
918	return rc;
919	return VINF_LDRVI_NOT_SIGNED;
920	}
921
922	# elif defined(VBOX_PERMIT_MORE) && defined(VBOX_PERMIT_EVEN_MORE)
923	/*
924	* Anything that's owned by the trusted installer.
925	*/
926	if ( (fFlags & SUPHNTVI_F_TRUSTED_INSTALLER_OWNER)
927	\|\| supHardNtViCheckIsOwnedByTrustedInstallerOrSimilar(hFile, pwszName))
928	return VINF_LDRVI_NOT_SIGNED;
929
930	# endif
931	#endif /* !IN_RING0 */
932
933	/*
934	* Not permitted.
935	*/
936	return rc;
937	}
938
939
940	/**
941	* @callback_method_impl{FNRTDUMPPRINTFV, Formats into RTERRINFO. }
942	*/
943	static DECLCALLBACK(void) supHardNtViAsn1DumpToErrInfo(void pvUser, const char pszFormat, va_list va)
944	{
945	PRTERRINFO pErrInfo = (PRTERRINFO)pvUser;
946	RTErrInfoAddV(pErrInfo, pErrInfo->rc, pszFormat, va);
947	}
948
949
950	/**
951	* @callback_method_impl{FNRTCRPKCS7VERIFYCERTCALLBACK,
952	* Standard code signing. Use this for Microsoft SPC.}
953	*/
954	static DECLCALLBACK(int) supHardNtViCertVerifyCallback(PCRTCRX509CERTIFICATE pCert, RTCRX509CERTPATHS hCertPaths,
955	uint32_t fFlags, void *pvUser, PRTERRINFO pErrInfo)
956	{
957	PSUPHNTVIRDR pNtViRdr = (PSUPHNTVIRDR)pvUser;
958	Assert(pNtViRdr->Core.uMagic == RTLDRREADER_MAGIC);
959
960	/*
961	* If there is no certificate path build & validator associated with this
962	* callback, it must be because of the build certificate. We trust the
963	* build certificate without any second thoughts.
964	*/
965	if (hCertPaths == NIL_RTCRX509CERTPATHS)
966	{
967	if (RTCrX509Certificate_Compare(pCert, &g_BuildX509Cert) == 0) /* healthy paranoia */
968	return VINF_SUCCESS;
969	int rc = RTErrInfoSetF(pErrInfo, VERR_SUP_VP_NOT_BUILD_CERT_IPE, "Not valid kernel code signature (fFlags=%#x).", fFlags);
970	if (pErrInfo)
971	{
972	RTErrInfoAdd(pErrInfo, rc, "\n\nExe cert:\n");
973	RTAsn1Dump(&pCert->SeqCore.Asn1Core, 0 /fFlags/, 0 /uLevel/, supHardNtViAsn1DumpToErrInfo, pErrInfo);
974	RTErrInfoAdd(pErrInfo, rc, "\n\nBuild cert:\n");
975	RTAsn1Dump(&g_BuildX509Cert.SeqCore.Asn1Core, 0 /fFlags/, 0 /uLevel/, supHardNtViAsn1DumpToErrInfo, pErrInfo);
976	}
977	return rc;
978	}
979
980	/*
981	* Standard code signing capabilites required.
982	*/
983	int rc = RTCrPkcs7VerifyCertCallbackCodeSigning(pCert, hCertPaths, fFlags, NULL, pErrInfo);
984	if ( RT_SUCCESS(rc)
985	&& (fFlags & RTCRPKCS7VCC_F_SIGNED_DATA))
986	{
987	/*
988	* If kernel signing, a valid certificate path must be anchored by the
989	* microsoft kernel signing root certificate.
990	*/
991	if (pNtViRdr->fFlags & SUPHNTVI_F_REQUIRE_KERNEL_CODE_SIGNING)
992	{
993	uint32_t cPaths = RTCrX509CertPathsGetPathCount(hCertPaths);
994	uint32_t cFound = 0;
995	uint32_t cValid = 0;
996	for (uint32_t iPath = 0; iPath < cPaths; iPath++)
997	{
998	bool fTrusted;
999	PCRTCRX509NAME pSubject;
1000	PCRTCRX509SUBJECTPUBLICKEYINFO pPublicKeyInfo;
1001	int rcVerify;
1002	rc = RTCrX509CertPathsQueryPathInfo(hCertPaths, iPath, &fTrusted, NULL /pcNodes/, &pSubject, &pPublicKeyInfo,
1003	NULL, NULL /pCertCtx/, &rcVerify);
1004	AssertRCBreak(rc);
1005
1006	if (RT_SUCCESS(rcVerify))
1007	{
1008	Assert(fTrusted);
1009	cValid++;
1010
1011	/*
1012	* Search the kernel signing root store for a matching anchor.
1013	*/
1014	RTCRSTORECERTSEARCH Search;
1015	rc = RTCrStoreCertFindBySubjectOrAltSubjectByRfc5280(g_hNtKernelRootStore, pSubject, &Search);
1016	AssertRCBreak(rc);
1017
1018	PCRTCRCERTCTX pCertCtx;
1019	while ((pCertCtx = RTCrStoreCertSearchNext(g_hNtKernelRootStore, &Search)) != NULL)
1020	{
1021	PCRTCRX509SUBJECTPUBLICKEYINFO pCertPubKeyInfo = NULL;
1022	if (pCertCtx->pCert)
1023	pCertPubKeyInfo = &pCertCtx->pCert->TbsCertificate.SubjectPublicKeyInfo;
1024	else if (pCertCtx->pTaInfo)
1025	pCertPubKeyInfo = &pCertCtx->pTaInfo->PubKey;
1026	else
1027	pCertPubKeyInfo = NULL;
1028	if ( pCertPubKeyInfo
1029	&& RTCrX509SubjectPublicKeyInfo_Compare(pCertPubKeyInfo, pPublicKeyInfo) == 0)
1030	cFound++;
1031	RTCrCertCtxRelease(pCertCtx);
1032	}
1033
1034	int rc2 = RTCrStoreCertSearchDestroy(g_hNtKernelRootStore, &Search); AssertRC(rc2);
1035	}
1036	}
1037	if (RT_SUCCESS(rc) && cFound == 0)
1038	rc = RTErrInfoSetF(pErrInfo, VERR_SUP_VP_NOT_VALID_KERNEL_CODE_SIGNATURE, "Not valid kernel code signature.");
1039	if (RT_SUCCESS(rc) && cValid < 2 && g_fHaveOtherRoots)
1040	rc = RTErrInfoSetF(pErrInfo, VERR_SUP_VP_UNEXPECTED_VALID_PATH_COUNT,
1041	"Expected at least %u valid paths, not %u.", 2, cValid);
1042	}
1043	}
1044
1045	/*
1046	* More requirements? NT5 build lab?
1047	*/
1048
1049	return rc;
1050	}
1051
1052
1053	static DECLCALLBACK(int) supHardNtViCallback(RTLDRMOD hLdrMod, RTLDRSIGNATURETYPE enmSignature,
1054	void const *pvSignature, size_t cbSignature,
1055	PRTERRINFO pErrInfo, void *pvUser)
1056	{
1057	RT_NOREF2(hLdrMod, enmSignature);
1058
1059	/*
1060	* Check out the input.
1061	*/
1062	PSUPHNTVIRDR pNtViRdr = (PSUPHNTVIRDR)pvUser;
1063	Assert(pNtViRdr->Core.uMagic == RTLDRREADER_MAGIC);
1064
1065	AssertReturn(cbSignature == sizeof(RTCRPKCS7CONTENTINFO), VERR_INTERNAL_ERROR_5);
1066	PCRTCRPKCS7CONTENTINFO pContentInfo = (PCRTCRPKCS7CONTENTINFO)pvSignature;
1067	AssertReturn(RTCrPkcs7ContentInfo_IsSignedData(pContentInfo), VERR_INTERNAL_ERROR_5);
1068	AssertReturn(pContentInfo->u.pSignedData->SignerInfos.cItems == 1, VERR_INTERNAL_ERROR_5);
1069	PCRTCRPKCS7SIGNERINFO pSignerInfo = pContentInfo->u.pSignedData->SignerInfos.papItems[0];
1070
1071	/*
1072	* If special certificate requirements, check them out before validating
1073	* the signature.
1074	*/
1075	if (pNtViRdr->fFlags & SUPHNTVI_F_REQUIRE_BUILD_CERT)
1076	{
1077	if (!RTCrX509Certificate_MatchIssuerAndSerialNumber(&g_BuildX509Cert,
1078	&pSignerInfo->IssuerAndSerialNumber.Name,
1079	&pSignerInfo->IssuerAndSerialNumber.SerialNumber))
1080	return RTErrInfoSet(pErrInfo, VERR_SUP_VP_NOT_SIGNED_WITH_BUILD_CERT, "Not signed with the build certificate.");
1081	}
1082
1083	/*
1084	* Verify the signature. We instruct the verifier to use the signing time
1085	* counter signature present when present, falling back on the timestamp
1086	* planted by the linker when absent. In ring-0 we don't have all the
1087	* necessary timestamp server root certificate info, so we have to allow
1088	* using counter signatures unverified there. Ditto for the early period
1089	* of ring-3 hardened stub execution.
1090	*/
1091	RTTIMESPEC ValidationTime;
1092	RTTimeSpecSetSeconds(&ValidationTime, pNtViRdr->uTimestamp);
1093
1094	uint32_t fFlags = RTCRPKCS7VERIFY_SD_F_ALWAYS_USE_SIGNING_TIME_IF_PRESENT
1095	\| RTCRPKCS7VERIFY_SD_F_ALWAYS_USE_MS_TIMESTAMP_IF_PRESENT
1096	\| RTCRPKCS7VERIFY_SD_F_COUNTER_SIGNATURE_SIGNING_TIME_ONLY;
1097	#ifndef IN_RING0
1098	if (!g_fHaveOtherRoots)
1099	#endif
1100	fFlags \|= RTCRPKCS7VERIFY_SD_F_USE_SIGNING_TIME_UNVERIFIED \| RTCRPKCS7VERIFY_SD_F_USE_MS_TIMESTAMP_UNVERIFIED;
1101	return RTCrPkcs7VerifySignedData(pContentInfo, fFlags, g_hSpcAndNtKernelSuppStore, g_hSpcAndNtKernelRootStore,
1102	&ValidationTime, supHardNtViCertVerifyCallback, pNtViRdr, pErrInfo);
1103	}
1104
1105
1106	/**
1107	* RTTimeNow equivaltent that handles ring-3 where we cannot use it.
1108	*
1109	* @returns pNow
1110	* @param pNow Where to return the current time.
1111	*/
1112	static PRTTIMESPEC supHardNtTimeNow(PRTTIMESPEC pNow)
1113	{
1114	#ifdef IN_RING3
1115	/*
1116	* Just read system time.
1117	*/
1118	KUSER_SHARED_DATA volatile pUserSharedData = (KUSER_SHARED_DATA volatile )MM_SHARED_USER_DATA_VA;
1119	# ifdef RT_ARCH_AMD64
1120	uint64_t uRet = (uint64_t volatile )&pUserSharedData->SystemTime; /* This is what KeQuerySystemTime does (missaligned). */
1121	return RTTimeSpecSetNtTime(pNow, uRet);
1122	# else
1123
1124	LARGE_INTEGER NtTime;
1125	do
1126	{
1127	NtTime.HighPart = pUserSharedData->SystemTime.High1Time;
1128	NtTime.LowPart = pUserSharedData->SystemTime.LowPart;
1129	} while (pUserSharedData->SystemTime.High2Time != NtTime.HighPart);
1130	return RTTimeSpecSetNtTime(pNow, NtTime.QuadPart);
1131	# endif
1132	#else /* IN_RING0 */
1133	return RTTimeNow(pNow);
1134	#endif /* IN_RING0 */
1135	}
1136
1137
1138	/**
1139	* Verifies the given loader image.
1140	*
1141	* @returns IPRT status code.
1142	* @param hLdrMod File handle to the executable file.
1143	* @param pwszName Full NT path to the DLL in question, used for
1144	* dealing with unsigned system dlls as well as for
1145	* error/logging.
1146	* @param pNtViRdr The reader instance /w flags.
1147	* @param fAvoidWinVerifyTrust Whether to avoid WinVerifyTrust because of
1148	* deadlock or other loader related dangers.
1149	* @param pfWinVerifyTrust Where to return whether WinVerifyTrust was used.
1150	* @param pErrInfo Pointer to error info structure. Optional.
1151	*/
1152	DECLHIDDEN(int) supHardenedWinVerifyImageByLdrMod(RTLDRMOD hLdrMod, PCRTUTF16 pwszName, PSUPHNTVIRDR pNtViRdr,
1153	bool fAvoidWinVerifyTrust, bool *pfWinVerifyTrust, PRTERRINFO pErrInfo)
1154	{
1155	if (pfWinVerifyTrust)
1156	*pfWinVerifyTrust = false;
1157
1158	#ifdef IN_RING3
1159	/* Check that the caller has performed the necessary library initialization. */
1160	if (!RTCrX509Certificate_IsPresent(&g_BuildX509Cert))
1161	return RTErrInfoSet(pErrInfo, VERR_WRONG_ORDER,
1162	"supHardenedWinVerifyImageByHandle: supHardenedWinInitImageVerifier was not called.");
1163	#endif
1164
1165	/*
1166	* Check the trusted installer bit first, if requested as it's somewhat
1167	* cheaper than the rest.
1168	*
1169	* We relax this for system32 and a little for WinSxS, like we used to, as
1170	* there are apparently some systems out there where the user, admin, or
1171	* someone has changed the ownership of core windows DLLs like user32.dll
1172	* and comctl32.dll. Since we need user32.dll and will be checking it's
1173	* digital signature, it's reasonably safe to let this thru. (The report
1174	* was of SECURITY_BUILTIN_DOMAIN_RID + DOMAIN_ALIAS_RID_ADMINS
1175	* owning user32.dll, see public ticket 13187, VBoxStartup.3.log.)
1176	*
1177	* We've also had problems with graphics driver components like ig75icd64.dll
1178	* and atig6pxx.dll not being owned by TrustedInstaller, with the result
1179	* that 3D got broken (mod by zero issue in test build 5). These were also
1180	* SECURITY_BUILTIN_DOMAIN_RID + DOMAIN_ALIAS_RID_ADMINS.
1181	*
1182	* In one report by 'thor' the WinSxS resident comctl32.dll was owned by
1183	* SECURITY_BUILTIN_DOMAIN_RID + DOMAIN_ALIAS_RID_ADMINS (with 4.3.16).
1184	*/
1185	/** @todo Since we're now allowing Builtin\\Administrators after all, perhaps we
1186	* could drop these system32 + winsxs hacks?? */
1187	if ( (pNtViRdr->fFlags & SUPHNTVI_F_TRUSTED_INSTALLER_OWNER)
1188	&& !supHardNtViCheckIsOwnedByTrustedInstallerOrSimilar(pNtViRdr->hFile, pwszName))
1189	{
1190	if (supHardViUtf16PathStartsWithEx(pwszName, (uint32_t)RTUtf16Len(pwszName),
1191	g_System32NtPath.UniStr.Buffer, g_System32NtPath.UniStr.Length / sizeof(WCHAR),
1192	true /fCheckSlash/))
1193	SUP_DPRINTF(("%ls: Relaxing the TrustedInstaller requirement for this DLL (it's in system32).\n", pwszName));
1194	else if (supHardViUtf16PathStartsWithEx(pwszName, (uint32_t)RTUtf16Len(pwszName),
1195	g_WinSxSNtPath.UniStr.Buffer, g_WinSxSNtPath.UniStr.Length / sizeof(WCHAR),
1196	true /fCheckSlash/))
1197	SUP_DPRINTF(("%ls: Relaxing the TrustedInstaller requirement for this DLL (it's in WinSxS).\n", pwszName));
1198	else
1199	return RTErrInfoSetF(pErrInfo, VERR_SUP_VP_NOT_OWNED_BY_TRUSTED_INSTALLER,
1200	"supHardenedWinVerifyImageByHandle: TrustedInstaller is not the owner of '%ls'.", pwszName);
1201	}
1202
1203	/*
1204	* Verify it.
1205	*
1206	* The PKCS #7 SignedData signature is checked in the callback. Any
1207	* signing certificate restrictions are also enforced there.
1208	*
1209	* For the time being, we use the executable timestamp as the
1210	* certificate validation date. We must query that first to avoid
1211	* potential issues re-entering the loader code from the callback.
1212	*
1213	* Update: Save the first timestamp we validate with build cert and
1214	* use this as a minimum timestamp for further build cert
1215	* validations. This works around issues with old DLLs that
1216	* we sign against with our certificate (crt, sdl, qt).
1217	*
1218	* Update: If the validation fails, retry with the current timestamp. This
1219	* is a workaround for NTDLL.DLL in build 14971 having a weird
1220	* timestamp: 0xDF1E957E (Sat Aug 14 14:05:18 2088).
1221	*/
1222	int rc = RTLdrQueryProp(hLdrMod, RTLDRPROP_TIMESTAMP_SECONDS, &pNtViRdr->uTimestamp, sizeof(pNtViRdr->uTimestamp));
1223	if (RT_SUCCESS(rc))
1224	{
1225	#ifdef IN_RING3 /* Hack alert! (see above) */
1226	if ( (pNtViRdr->fFlags & SUPHNTVI_F_REQUIRE_KERNEL_CODE_SIGNING)
1227	&& (pNtViRdr->fFlags & SUPHNTVI_F_REQUIRE_SIGNATURE_ENFORCEMENT)
1228	&& pNtViRdr->uTimestamp < g_uBuildTimestampHack)
1229	pNtViRdr->uTimestamp = g_uBuildTimestampHack;
1230	#endif
1231
1232	rc = RTLdrVerifySignature(hLdrMod, supHardNtViCallback, pNtViRdr, pErrInfo);
1233
1234	#ifdef IN_RING3 /* Hack alert! (see above) */
1235	if ((pNtViRdr->fFlags & SUPHNTVI_F_REQUIRE_BUILD_CERT) && g_uBuildTimestampHack == 0 && RT_SUCCESS(rc))
1236	g_uBuildTimestampHack = pNtViRdr->uTimestamp;
1237	#endif
1238
1239	if (rc == VERR_CR_X509_CPV_NOT_VALID_AT_TIME)
1240	{
1241	RTTIMESPEC Now;
1242	uint64_t uOld = pNtViRdr->uTimestamp;
1243	pNtViRdr->uTimestamp = RTTimeSpecGetSeconds(supHardNtTimeNow(&Now));
1244	SUP_DPRINTF(("%ls: VERR_CR_X509_CPV_NOT_VALID_AT_TIME for %#RX64; retrying against current time: %#RX64.\n",
1245	pwszName, uOld, pNtViRdr->uTimestamp)); NOREF(uOld);
1246	rc = RTLdrVerifySignature(hLdrMod, supHardNtViCallback, pNtViRdr, pErrInfo);
1247	}
1248
1249	/*
1250	* Microsoft doesn't sign a whole bunch of DLLs, so we have to
1251	* ASSUME that a bunch of system DLLs are fine.
1252	*/
1253	if (rc == VERR_LDRVI_NOT_SIGNED)
1254	rc = supHardNtViCheckIfNotSignedOk(hLdrMod, pwszName, pNtViRdr->fFlags, pNtViRdr->hFile, rc);
1255	if (RT_FAILURE(rc))
1256	RTErrInfoAddF(pErrInfo, rc, ": %ls", pwszName);
1257
1258	/*
1259	* Check for the signature checking enforcement, if requested to do so.
1260	*/
1261	if (RT_SUCCESS(rc) && (pNtViRdr->fFlags & SUPHNTVI_F_REQUIRE_SIGNATURE_ENFORCEMENT))
1262	{
1263	bool fEnforced = false;
1264	int rc2 = RTLdrQueryProp(hLdrMod, RTLDRPROP_SIGNATURE_CHECKS_ENFORCED, &fEnforced, sizeof(fEnforced));
1265	if (RT_FAILURE(rc2))
1266	rc = RTErrInfoSetF(pErrInfo, rc2, "Querying RTLDRPROP_SIGNATURE_CHECKS_ENFORCED failed on %ls: %Rrc.",
1267	pwszName, rc2);
1268	else if (!fEnforced)
1269	rc = RTErrInfoSetF(pErrInfo, VERR_SUP_VP_SIGNATURE_CHECKS_NOT_ENFORCED,
1270	"The image '%ls' was not linked with /IntegrityCheck.", pwszName);
1271	}
1272	}
1273	else
1274	RTErrInfoSetF(pErrInfo, rc, "RTLdrQueryProp/RTLDRPROP_TIMESTAMP_SECONDS failed on %ls: %Rrc", pwszName, rc);
1275
1276	#ifdef IN_RING3
1277	/*
1278	* Pass it thru WinVerifyTrust when possible.
1279	*/
1280	if (!fAvoidWinVerifyTrust)
1281	rc = supHardenedWinVerifyImageTrust(pNtViRdr->hFile, pwszName, pNtViRdr->fFlags, rc, pfWinVerifyTrust, pErrInfo);
1282	#else
1283	RT_NOREF1(fAvoidWinVerifyTrust);
1284	#endif
1285
1286	/*
1287	* Check for blacklisted DLLs, both internal name and filename.
1288	*/
1289	if (RT_SUCCESS(rc))
1290	{
1291	size_t const cwcName = RTUtf16Len(pwszName);
1292	char szIntName[64];
1293	int rc2 = RTLdrQueryProp(hLdrMod, RTLDRPROP_INTERNAL_NAME, szIntName, sizeof(szIntName));
1294	if (RT_SUCCESS(rc2))
1295	{
1296	size_t const cchIntName = strlen(szIntName);
1297	for (unsigned i = 0; g_aSupNtViBlacklistedDlls[i].psz != NULL; i++)
1298	if ( cchIntName == g_aSupNtViBlacklistedDlls[i].cch
1299	&& RTStrICmpAscii(szIntName, g_aSupNtViBlacklistedDlls[i].psz) == 0)
1300	{
1301	rc = RTErrInfoSetF(pErrInfo, VERR_SUP_VP_UNDESIRABLE_MODULE,
1302	"The image '%ls' is listed as undesirable.", pwszName);
1303	break;
1304	}
1305	}
1306	if (RT_SUCCESS(rc))
1307	{
1308	for (unsigned i = 0; g_aSupNtViBlacklistedDlls[i].psz != NULL; i++)
1309	if (cwcName >= g_aSupNtViBlacklistedDlls[i].cch)
1310	{
1311	PCRTUTF16 pwszTmp = &pwszName[cwcName - g_aSupNtViBlacklistedDlls[i].cch];
1312	if ( ( cwcName == g_aSupNtViBlacklistedDlls[i].cch
1313	\|\| pwszTmp[-1] == '\\'
1314	\|\| pwszTmp[-1] == '/')
1315	&& RTUtf16ICmpAscii(pwszTmp, g_aSupNtViBlacklistedDlls[i].psz) == 0)
1316	{
1317	rc = RTErrInfoSetF(pErrInfo, VERR_SUP_VP_UNDESIRABLE_MODULE,
1318	"The image '%ls' is listed as undesirable.", pwszName);
1319	break;
1320	}
1321	}
1322	}
1323	}
1324
1325	#ifdef IN_SUP_HARDENED_R3
1326	/*
1327	* Hook for the LdrLoadDll code to schedule scanning of imports.
1328	*/
1329	if (RT_SUCCESS(rc))
1330	supR3HardenedWinVerifyCacheScheduleImports(hLdrMod, pwszName);
1331	#endif
1332
1333	return rc;
1334	}
1335
1336
1337	/**
1338	* Verifies the given executable image.
1339	*
1340	* @returns IPRT status code.
1341	* @param hFile File handle to the executable file.
1342	* @param pwszName Full NT path to the DLL in question, used for
1343	* dealing with unsigned system dlls as well as for
1344	* error/logging.
1345	* @param fFlags Flags, SUPHNTVI_F_XXX.
1346	* @param fAvoidWinVerifyTrust Whether to avoid WinVerifyTrust because of
1347	* deadlock or other loader related dangers.
1348	* @param pfWinVerifyTrust Where to return whether WinVerifyTrust was used.
1349	* @param pErrInfo Pointer to error info structure. Optional.
1350	*/
1351	DECLHIDDEN(int) supHardenedWinVerifyImageByHandle(HANDLE hFile, PCRTUTF16 pwszName, uint32_t fFlags, bool fAvoidWinVerifyTrust,
1352	bool *pfWinVerifyTrust, PRTERRINFO pErrInfo)
1353	{
1354	/*
1355	* Create a reader instance.
1356	*/
1357	PSUPHNTVIRDR pNtViRdr;
1358	int rc = supHardNtViRdrCreate(hFile, pwszName, fFlags, &pNtViRdr);
1359	if (RT_SUCCESS(rc))
1360	{
1361	/*
1362	* Open the image.
1363	*/
1364	RTLDRMOD hLdrMod;
1365	RTLDRARCH enmArch = fFlags & SUPHNTVI_F_RC_IMAGE ? RTLDRARCH_X86_32 : RTLDRARCH_HOST;
1366	uint32_t fLdrFlags = RTLDR_O_FOR_VALIDATION \| RTLDR_O_IGNORE_ARCH_IF_NO_CODE;
1367	if (fFlags & SUPHNTVI_F_IGNORE_ARCHITECTURE)
1368	fLdrFlags \|= RTLDR_O_IGNORE_ARCH_IF_NO_CODE;
1369	rc = RTLdrOpenWithReader(&pNtViRdr->Core, fLdrFlags, enmArch, &hLdrMod, pErrInfo);
1370	if (RT_SUCCESS(rc))
1371	{
1372	/*
1373	* Verify it.
1374	*/
1375	rc = supHardenedWinVerifyImageByLdrMod(hLdrMod, pwszName, pNtViRdr, fAvoidWinVerifyTrust, pfWinVerifyTrust, pErrInfo);
1376	int rc2 = RTLdrClose(hLdrMod); AssertRC(rc2);
1377	}
1378	else
1379	supHardNtViRdrDestroy(&pNtViRdr->Core);
1380	}
1381	SUP_DPRINTF(("supHardenedWinVerifyImageByHandle: -> %d (%ls)%s\n",
1382	rc, pwszName, pfWinVerifyTrust && *pfWinVerifyTrust ? " WinVerifyTrust" : ""));
1383	return rc;
1384	}
1385
1386
1387	#ifdef IN_RING3
1388	/**
1389	* supHardenedWinVerifyImageByHandle version without the name.
1390	*
1391	* The name is derived from the handle.
1392	*
1393	* @returns IPRT status code.
1394	* @param hFile File handle to the executable file.
1395	* @param fFlags Flags, SUPHNTVI_F_XXX.
1396	* @param pErrInfo Pointer to error info structure. Optional.
1397	*/
1398	DECLHIDDEN(int) supHardenedWinVerifyImageByHandleNoName(HANDLE hFile, uint32_t fFlags, PRTERRINFO pErrInfo)
1399	{
1400	/*
1401	* Determine the NT name and call the verification function.
1402	*/
1403	union
1404	{
1405	UNICODE_STRING UniStr;
1406	uint8_t abBuffer[(MAX_PATH + 8 + 1) * 2];
1407	} uBuf;
1408
1409	ULONG cbIgn;
1410	NTSTATUS rcNt = NtQueryObject(hFile,
1411	ObjectNameInformation,
1412	&uBuf,
1413	sizeof(uBuf) - sizeof(WCHAR),
1414	&cbIgn);
1415	if (NT_SUCCESS(rcNt))
1416	uBuf.UniStr.Buffer[uBuf.UniStr.Length / sizeof(WCHAR)] = '\0';
1417	else
1418	uBuf.UniStr.Buffer = (WCHAR *)L"TODO3";
1419
1420	return supHardenedWinVerifyImageByHandle(hFile, uBuf.UniStr.Buffer, fFlags, false /fAvoidWinVerifyTrust/,
1421	NULL /pfWinVerifyTrust/, pErrInfo);
1422	}
1423	#endif /* IN_RING3 */
1424
1425
1426	/**
1427	* Retrieves the full official path to the system root or one of it's sub
1428	* directories.
1429	*
1430	* This code is also used by the support driver.
1431	*
1432	* @returns VBox status code.
1433	* @param pvBuf The output buffer. This will contain a
1434	* UNICODE_STRING followed (at the kernel's
1435	* discretion) the string buffer.
1436	* @param cbBuf The size of the buffer @a pvBuf points to.
1437	* @param enmDir Which directory under the system root we're
1438	* interested in.
1439	* @param pErrInfo Pointer to error info structure. Optional.
1440	*/
1441	DECLHIDDEN(int) supHardNtGetSystemRootDir(void *pvBuf, uint32_t cbBuf, SUPHARDNTSYSROOTDIR enmDir, PRTERRINFO pErrInfo)
1442	{
1443	HANDLE hFile = RTNT_INVALID_HANDLE_VALUE;
1444	IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER;
1445
1446	UNICODE_STRING NtName;
1447	switch (enmDir)
1448	{
1449	case kSupHardNtSysRootDir_System32:
1450	{
1451	static const WCHAR s_wszNameSystem32[] = L"\\SystemRoot\\System32\\";
1452	NtName.Buffer = (PWSTR)s_wszNameSystem32;
1453	NtName.Length = sizeof(s_wszNameSystem32) - sizeof(WCHAR);
1454	NtName.MaximumLength = sizeof(s_wszNameSystem32);
1455	break;
1456	}
1457	case kSupHardNtSysRootDir_WinSxS:
1458	{
1459	static const WCHAR s_wszNameWinSxS[] = L"\\SystemRoot\\WinSxS\\";
1460	NtName.Buffer = (PWSTR)s_wszNameWinSxS;
1461	NtName.Length = sizeof(s_wszNameWinSxS) - sizeof(WCHAR);
1462	NtName.MaximumLength = sizeof(s_wszNameWinSxS);
1463	break;
1464	}
1465	default:
1466	AssertFailed();
1467	return VERR_INVALID_PARAMETER;
1468	}
1469
1470	OBJECT_ATTRIBUTES ObjAttr;
1471	InitializeObjectAttributes(&ObjAttr, &NtName, OBJ_CASE_INSENSITIVE, NULL /hRootDir/, NULL /pSecDesc/);
1472
1473	NTSTATUS rcNt = NtCreateFile(&hFile,
1474	FILE_READ_DATA \| SYNCHRONIZE,
1475	&ObjAttr,
1476	&Ios,
1477	NULL /* Allocation Size*/,
1478	FILE_ATTRIBUTE_NORMAL,
1479	FILE_SHARE_READ \| FILE_SHARE_WRITE,
1480	FILE_OPEN,
1481	FILE_DIRECTORY_FILE \| FILE_OPEN_FOR_BACKUP_INTENT \| FILE_SYNCHRONOUS_IO_NONALERT,
1482	NULL /EaBuffer/,
1483	0 /EaLength/);
1484	if (NT_SUCCESS(rcNt))
1485	rcNt = Ios.Status;
1486	if (NT_SUCCESS(rcNt))
1487	{
1488	ULONG cbIgn;
1489	rcNt = NtQueryObject(hFile,
1490	ObjectNameInformation,
1491	pvBuf,
1492	cbBuf - sizeof(WCHAR),
1493	&cbIgn);
1494	NtClose(hFile);
1495	if (NT_SUCCESS(rcNt))
1496	{
1497	PUNICODE_STRING pUniStr = (PUNICODE_STRING)pvBuf;
1498	if (pUniStr->Length > 0)
1499	{
1500	/* Make sure it's terminated so it can safely be printed.*/
1501	pUniStr->Buffer[pUniStr->Length / sizeof(WCHAR)] = '\0';
1502	return VINF_SUCCESS;
1503	}
1504
1505	return RTErrInfoSetF(pErrInfo, VERR_SUP_VP_SYSTEM32_PATH,
1506	"NtQueryObject returned an empty path for '%ls'", NtName.Buffer);
1507	}
1508	return RTErrInfoSetF(pErrInfo, VERR_SUP_VP_SYSTEM32_PATH, "NtQueryObject failed on '%ls' dir: %#x", NtName.Buffer, rcNt);
1509	}
1510	return RTErrInfoSetF(pErrInfo, VERR_SUP_VP_SYSTEM32_PATH, "Failure to open '%ls': %#x", NtName.Buffer, rcNt);
1511	}
1512
1513
1514	/**
1515	* Initialize one certificate entry.
1516	*
1517	* @returns VBox status code.
1518	* @param pCert The X.509 certificate representation to init.
1519	* @param pabCert The raw DER encoded certificate.
1520	* @param cbCert The size of the raw certificate.
1521	* @param pErrInfo Where to return extended error info. Optional.
1522	* @param pszErrorTag Error tag.
1523	*/
1524	static int supHardNtViCertInit(PRTCRX509CERTIFICATE pCert, unsigned char const *pabCert, unsigned cbCert,
1525	PRTERRINFO pErrInfo, const char *pszErrorTag)
1526	{
1527	AssertReturn(cbCert > 16 && cbCert < _128K,
1528	RTErrInfoSetF(pErrInfo, VERR_INTERNAL_ERROR_3, "%s: cbCert=%#x out of range", pszErrorTag, cbCert));
1529	AssertReturn(!RTCrX509Certificate_IsPresent(pCert),
1530	RTErrInfoSetF(pErrInfo, VERR_WRONG_ORDER, "%s: Certificate already decoded?", pszErrorTag));
1531
1532	RTASN1CURSORPRIMARY PrimaryCursor;
1533	RTAsn1CursorInitPrimary(&PrimaryCursor, pabCert, cbCert, pErrInfo, &g_RTAsn1DefaultAllocator, RTASN1CURSOR_FLAGS_DER, NULL);
1534	int rc = RTCrX509Certificate_DecodeAsn1(&PrimaryCursor.Cursor, 0, pCert, pszErrorTag);
1535	if (RT_SUCCESS(rc))
1536	rc = RTCrX509Certificate_CheckSanity(pCert, 0, pErrInfo, pszErrorTag);
1537	return rc;
1538	}
1539
1540
1541	static int supHardNtViCertStoreAddArray(RTCRSTORE hStore, PCSUPTAENTRY paCerts, unsigned cCerts, PRTERRINFO pErrInfo)
1542	{
1543	for (uint32_t i = 0; i < cCerts; i++)
1544	{
1545	int rc = RTCrStoreCertAddEncoded(hStore, RTCRCERTCTX_F_ENC_TAF_DER, paCerts[i].pch, paCerts[i].cb, pErrInfo);
1546	if (RT_FAILURE(rc))
1547	return rc;
1548	}
1549	return VINF_SUCCESS;
1550	}
1551
1552
1553	/**
1554	* Initialize a certificate table.
1555	*
1556	* @param phStore Where to return the store pointer.
1557	* @param paCerts1 Pointer to the first certificate table.
1558	* @param cCerts1 Entries in the first certificate table.
1559	* @param paCerts2 Pointer to the second certificate table.
1560	* @param cCerts2 Entries in the second certificate table.
1561	* @param paCerts3 Pointer to the third certificate table.
1562	* @param cCerts3 Entries in the third certificate table.
1563	* @param pErrInfo Where to return extended error info. Optional.
1564	* @param pszErrorTag Error tag.
1565	*/
1566	static int supHardNtViCertStoreInit(PRTCRSTORE phStore,
1567	PCSUPTAENTRY paCerts1, unsigned cCerts1,
1568	PCSUPTAENTRY paCerts2, unsigned cCerts2,
1569	PCSUPTAENTRY paCerts3, unsigned cCerts3,
1570	PRTERRINFO pErrInfo, const char *pszErrorTag)
1571	{
1572	AssertReturn(*phStore == NIL_RTCRSTORE, VERR_WRONG_ORDER);
1573	RT_NOREF1(pszErrorTag);
1574
1575	int rc = RTCrStoreCreateInMem(phStore, cCerts1 + cCerts2);
1576	if (RT_FAILURE(rc))
1577	return RTErrInfoSetF(pErrInfo, rc, "RTCrStoreCreateMemoryStore failed: %Rrc", rc);
1578
1579	rc = supHardNtViCertStoreAddArray(*phStore, paCerts1, cCerts1, pErrInfo);
1580	if (RT_SUCCESS(rc))
1581	rc = supHardNtViCertStoreAddArray(*phStore, paCerts2, cCerts2, pErrInfo);
1582	if (RT_SUCCESS(rc))
1583	rc = supHardNtViCertStoreAddArray(*phStore, paCerts3, cCerts3, pErrInfo);
1584	return rc;
1585	}
1586
1587
1588	#if defined(IN_RING3) && !defined(VBOX_PERMIT_EVEN_MORE)
1589	/**
1590	* Initializes the windows paths.
1591	*/
1592	static void supHardenedWinInitImageVerifierWinPaths(void)
1593	{
1594	/*
1595	* Windows paths that we're interested in.
1596	*/
1597	static const struct
1598	{
1599	SUPSYSROOTDIRBUF *pNtPath;
1600	WCHAR const *pwszRegValue;
1601	const char *pszLogName;
1602	} s_aPaths[] =
1603	{
1604	{ &g_ProgramFilesNtPath, L"ProgramFilesDir", "ProgDir" },
1605	{ &g_CommonFilesNtPath, L"CommonFilesDir", "ComDir" },
1606	# ifdef RT_ARCH_AMD64
1607	{ &g_ProgramFilesX86NtPath, L"ProgramFilesDir (x86)", "ProgDir32" },
1608	{ &g_CommonFilesX86NtPath, L"CommonFilesDir (x86)", "ComDir32" },
1609	# endif
1610	};
1611
1612	/*
1613	* Open the registry key containing the paths.
1614	*/
1615	UNICODE_STRING NtName = RTNT_CONSTANT_UNISTR(L"\\Registry\\Machine\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion");
1616	OBJECT_ATTRIBUTES ObjAttr;
1617	InitializeObjectAttributes(&ObjAttr, &NtName, OBJ_CASE_INSENSITIVE, NULL /hRootDir/, NULL /pSecDesc/);
1618	HANDLE hKey;
1619	NTSTATUS rcNt = NtOpenKey(&hKey, KEY_QUERY_VALUE, &ObjAttr);
1620	if (NT_SUCCESS(rcNt))
1621	{
1622	/*
1623	* Loop over the paths and resolve their NT paths.
1624	*/
1625	for (uint32_t i = 0; i < RT_ELEMENTS(s_aPaths); i++)
1626	{
1627	/*
1628	* Query the value first.
1629	*/
1630	UNICODE_STRING ValueName;
1631	ValueName.Buffer = (WCHAR *)s_aPaths[i].pwszRegValue;
1632	ValueName.Length = (USHORT)(RTUtf16Len(s_aPaths[i].pwszRegValue) * sizeof(WCHAR));
1633	ValueName.MaximumLength = ValueName.Length + sizeof(WCHAR);
1634
1635	union
1636	{
1637	KEY_VALUE_PARTIAL_INFORMATION PartialInfo;
1638	uint8_t abPadding[sizeof(KEY_VALUE_PARTIAL_INFORMATION) + sizeof(WCHAR) * 128];
1639	uint64_t uAlign;
1640	} uBuf;
1641
1642	ULONG cbActual = 0;
1643	rcNt = NtQueryValueKey(hKey, &ValueName, KeyValuePartialInformation, &uBuf, sizeof(uBuf) - sizeof(WCHAR), &cbActual);
1644	if (NT_SUCCESS(rcNt))
1645	{
1646	/*
1647	* Must be a simple string value, terminate it.
1648	*/
1649	if ( uBuf.PartialInfo.Type == REG_EXPAND_SZ
1650	\|\| uBuf.PartialInfo.Type == REG_SZ)
1651	{
1652	/*
1653	* Expand any environment variable references before opening it.
1654	* We use the result buffer as storage for the expaneded path,
1655	* reserving space for the windows name space prefix.
1656	*/
1657	UNICODE_STRING Src;
1658	Src.Buffer = (WCHAR *)uBuf.PartialInfo.Data;
1659	Src.Length = uBuf.PartialInfo.DataLength;
1660	if (Src.Length >= sizeof(WCHAR) && Src.Buffer[Src.Length / sizeof(WCHAR) - 1] == '\0')
1661	Src.Length -= sizeof(WCHAR);
1662	Src.MaximumLength = Src.Length + sizeof(WCHAR);
1663	Src.Buffer[uBuf.PartialInfo.DataLength / sizeof(WCHAR)] = '\0';
1664
1665	s_aPaths[i].pNtPath->awcBuffer[0] = '\\';
1666	s_aPaths[i].pNtPath->awcBuffer[1] = '?';
1667	s_aPaths[i].pNtPath->awcBuffer[2] = '?';
1668	s_aPaths[i].pNtPath->awcBuffer[3] = '\\';
1669	UNICODE_STRING Dst;
1670	Dst.Buffer = &s_aPaths[i].pNtPath->awcBuffer[4];
1671	Dst.MaximumLength = sizeof(s_aPaths[i].pNtPath->awcBuffer) - sizeof(WCHAR) * 5;
1672	Dst.Length = Dst.MaximumLength;
1673
1674	if (uBuf.PartialInfo.Type == REG_EXPAND_SZ)
1675	rcNt = RtlExpandEnvironmentStrings_U(NULL, &Src, &Dst, NULL);
1676	else
1677	{
1678	memcpy(Dst.Buffer, Src.Buffer, Src.Length);
1679	Dst.Length = Src.Length;
1680	}
1681	if (NT_SUCCESS(rcNt))
1682	{
1683	Dst.Buffer[Dst.Length / sizeof(WCHAR)] = '\0';
1684
1685	/*
1686	* Include the \\??\\ prefix in the result and open the path.
1687	*/
1688	Dst.Buffer -= 4;
1689	Dst.Length += 4 * sizeof(WCHAR);
1690	Dst.MaximumLength += 4 * sizeof(WCHAR);
1691	InitializeObjectAttributes(&ObjAttr, &Dst, OBJ_CASE_INSENSITIVE, NULL /hRootDir/, NULL /pSecDesc/);
1692	HANDLE hFile = INVALID_HANDLE_VALUE;
1693	IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER;
1694	NTSTATUS rcNt = NtCreateFile(&hFile,
1695	FILE_READ_DATA \| SYNCHRONIZE,
1696	&ObjAttr,
1697	&Ios,
1698	NULL /* Allocation Size*/,
1699	FILE_ATTRIBUTE_NORMAL,
1700	FILE_SHARE_READ \| FILE_SHARE_WRITE,
1701	FILE_OPEN,
1702	FILE_DIRECTORY_FILE \| FILE_OPEN_FOR_BACKUP_INTENT
1703	\| FILE_SYNCHRONOUS_IO_NONALERT,
1704	NULL /EaBuffer/,
1705	0 /EaLength/);
1706	if (NT_SUCCESS(rcNt))
1707	rcNt = Ios.Status;
1708	if (NT_SUCCESS(rcNt))
1709	{
1710	/*
1711	* Query the real NT name.
1712	*/
1713	ULONG cbIgn;
1714	rcNt = NtQueryObject(hFile,
1715	ObjectNameInformation,
1716	s_aPaths[i].pNtPath,
1717	sizeof(*s_aPaths[i].pNtPath) - sizeof(WCHAR),
1718	&cbIgn);
1719	if (NT_SUCCESS(rcNt))
1720	{
1721	if (s_aPaths[i].pNtPath->UniStr.Length > 0)
1722	{
1723	/* Make sure it's terminated.*/
1724	s_aPaths[i].pNtPath->UniStr.Buffer[s_aPaths[i].pNtPath->UniStr.Length / sizeof(WCHAR)] = '\0';
1725	SUP_DPRINTF(("%s:%*s %ls\n", s_aPaths[i].pszLogName, 9 - strlen(s_aPaths[i].pszLogName), "",
1726	s_aPaths[i].pNtPath->UniStr.Buffer));
1727	}
1728	else
1729	{
1730	SUP_DPRINTF(("%s: NtQueryObject returned empty string\n", s_aPaths[i].pszLogName));
1731	rcNt = STATUS_INVALID_PARAMETER;
1732	}
1733	}
1734	else
1735	SUP_DPRINTF(("%s: NtQueryObject failed: %#x\n", s_aPaths[i].pszLogName, rcNt));
1736	NtClose(hFile);
1737	}
1738	else
1739	SUP_DPRINTF(("%s: NtCreateFile failed: %#x (%ls)\n",
1740	s_aPaths[i].pszLogName, rcNt, Dst.Buffer));
1741	}
1742	else
1743	SUP_DPRINTF(("%s: RtlExpandEnvironmentStrings_U failed: %#x (%ls)\n",
1744	s_aPaths[i].pszLogName, rcNt, Src.Buffer));
1745	}
1746	else
1747	{
1748	SUP_DPRINTF(("%s: type mismatch: %#x\n", s_aPaths[i].pszLogName, uBuf.PartialInfo.Type));
1749	rcNt = STATUS_INVALID_PARAMETER;
1750	}
1751	}
1752	else
1753	SUP_DPRINTF(("%s: NtQueryValueKey failed: %#x\n", s_aPaths[i].pszLogName, rcNt));
1754
1755	/* Stub the entry on failure. */
1756	if (!NT_SUCCESS(rcNt))
1757	{
1758	s_aPaths[i].pNtPath->UniStr.Length = 0;
1759	s_aPaths[i].pNtPath->UniStr.Buffer = NULL;
1760	}
1761	}
1762	NtClose(hKey);
1763	}
1764	else
1765	{
1766	SUP_DPRINTF(("NtOpenKey(%ls) failed: %#x\n", NtName.Buffer, rcNt));
1767
1768	/* Stub all the entries on failure. */
1769	for (uint32_t i = 0; i < RT_ELEMENTS(s_aPaths); i++)
1770	{
1771	s_aPaths[i].pNtPath->UniStr.Length = 0;
1772	s_aPaths[i].pNtPath->UniStr.Buffer = NULL;
1773	}
1774	}
1775	}
1776	#endif /* IN_RING3 && !VBOX_PERMIT_EVEN_MORE */
1777
1778
1779	/**
1780	* This initializes the certificates globals so we don't have to reparse them
1781	* every time we need to verify an image.
1782	*
1783	* @returns IPRT status code.
1784	* @param pErrInfo Where to return extended error info. Optional.
1785	*/
1786	DECLHIDDEN(int) supHardenedWinInitImageVerifier(PRTERRINFO pErrInfo)
1787	{
1788	AssertReturn(!RTCrX509Certificate_IsPresent(&g_BuildX509Cert), VERR_WRONG_ORDER);
1789
1790	/*
1791	* Get the system root paths.
1792	*/
1793	int rc = supHardNtGetSystemRootDir(&g_System32NtPath, sizeof(g_System32NtPath), kSupHardNtSysRootDir_System32, pErrInfo);
1794	if (RT_SUCCESS(rc))
1795	rc = supHardNtGetSystemRootDir(&g_WinSxSNtPath, sizeof(g_WinSxSNtPath), kSupHardNtSysRootDir_WinSxS, pErrInfo);
1796	if (RT_SUCCESS(rc))
1797	{
1798	SUP_DPRINTF(("System32: %ls\n", g_System32NtPath.UniStr.Buffer));
1799	SUP_DPRINTF(("WinSxS: %ls\n", g_WinSxSNtPath.UniStr.Buffer));
1800	#if defined(IN_RING3) && !defined(VBOX_PERMIT_EVEN_MORE)
1801	supHardenedWinInitImageVerifierWinPaths();
1802	#endif
1803
1804	/*
1805	* Initialize it, leaving the cleanup to the termination call.
1806	*/
1807	rc = supHardNtViCertInit(&g_BuildX509Cert, g_abSUPBuildCert, g_cbSUPBuildCert, pErrInfo, "BuildCertificate");
1808	if (RT_SUCCESS(rc))
1809	rc = supHardNtViCertStoreInit(&g_hSpcRootStore, g_aSUPSpcRootTAs, g_cSUPSpcRootTAs,
1810	NULL, 0, NULL, 0, pErrInfo, "SpcRoot");
1811	if (RT_SUCCESS(rc))
1812	rc = supHardNtViCertStoreInit(&g_hNtKernelRootStore, g_aSUPNtKernelRootTAs, g_cSUPNtKernelRootTAs,
1813	NULL, 0, NULL, 0, pErrInfo, "NtKernelRoot");
1814	if (RT_SUCCESS(rc))
1815	rc = supHardNtViCertStoreInit(&g_hSpcAndNtKernelRootStore,
1816	g_aSUPSpcRootTAs, g_cSUPSpcRootTAs,
1817	g_aSUPNtKernelRootTAs, g_cSUPNtKernelRootTAs,
1818	g_aSUPTimestampTAs, g_cSUPTimestampTAs,
1819	pErrInfo, "SpcAndNtKernelRoot");
1820	if (RT_SUCCESS(rc))
1821	rc = supHardNtViCertStoreInit(&g_hSpcAndNtKernelSuppStore,
1822	NULL, 0, NULL, 0, NULL, 0,
1823	pErrInfo, "SpcAndNtKernelSupplemental");
1824
1825	#if 0 /* For the time being, always trust the build certificate. It bypasses the timestamp issues of CRT and SDL. */
1826	/* If the build certificate is a test singing certificate, it must be a
1827	trusted root or we'll fail to validate anything. */
1828	if ( RT_SUCCESS(rc)
1829	&& RTCrX509Name_Compare(&g_BuildX509Cert.TbsCertificate.Subject, &g_BuildX509Cert.TbsCertificate.Issuer) == 0)
1830	#else
1831	if (RT_SUCCESS(rc))
1832	#endif
1833	rc = RTCrStoreCertAddEncoded(g_hSpcAndNtKernelRootStore, RTCRCERTCTX_F_ENC_X509_DER,
1834	g_abSUPBuildCert, g_cbSUPBuildCert, pErrInfo);
1835
1836	if (RT_SUCCESS(rc))
1837	{
1838	/*
1839	* Finally initialize known SIDs that we use.
1840	*/
1841	SID_IDENTIFIER_AUTHORITY s_NtAuth = SECURITY_NT_AUTHORITY;
1842	NTSTATUS rcNt = RtlInitializeSid(&g_TrustedInstallerSid, &s_NtAuth, SECURITY_SERVICE_ID_RID_COUNT);
1843	if (NT_SUCCESS(rcNt))
1844	{
1845	*RtlSubAuthoritySid(&g_TrustedInstallerSid, 0) = SECURITY_SERVICE_ID_BASE_RID;
1846	*RtlSubAuthoritySid(&g_TrustedInstallerSid, 1) = 956008885;
1847	*RtlSubAuthoritySid(&g_TrustedInstallerSid, 2) = 3418522649;
1848	*RtlSubAuthoritySid(&g_TrustedInstallerSid, 3) = 1831038044;
1849	*RtlSubAuthoritySid(&g_TrustedInstallerSid, 4) = 1853292631;
1850	*RtlSubAuthoritySid(&g_TrustedInstallerSid, 5) = 2271478464;
1851
1852	rcNt = RtlInitializeSid(&g_LocalSystemSid, &s_NtAuth, 1);
1853	if (NT_SUCCESS(rcNt))
1854	{
1855	*RtlSubAuthoritySid(&g_LocalSystemSid, 0) = SECURITY_LOCAL_SYSTEM_RID;
1856
1857	rcNt = RtlInitializeSid(&g_AdminsGroupSid, &s_NtAuth, 2);
1858	if (NT_SUCCESS(rcNt))
1859	{
1860	*RtlSubAuthoritySid(&g_AdminsGroupSid, 0) = SECURITY_BUILTIN_DOMAIN_RID;
1861	*RtlSubAuthoritySid(&g_AdminsGroupSid, 1) = DOMAIN_ALIAS_RID_ADMINS;
1862	return VINF_SUCCESS;
1863	}
1864	}
1865	}
1866	rc = RTErrConvertFromNtStatus(rcNt);
1867	}
1868	supHardenedWinTermImageVerifier();
1869	}
1870	return rc;
1871	}
1872
1873
1874	/**
1875	* Releases resources allocated by supHardenedWinInitImageVerifier.
1876	*/
1877	DECLHIDDEN(void) supHardenedWinTermImageVerifier(void)
1878	{
1879	if (RTCrX509Certificate_IsPresent(&g_BuildX509Cert))
1880	RTAsn1VtDelete(&g_BuildX509Cert.SeqCore.Asn1Core);
1881
1882	RTCrStoreRelease(g_hSpcAndNtKernelSuppStore);
1883	g_hSpcAndNtKernelSuppStore = NIL_RTCRSTORE;
1884	RTCrStoreRelease(g_hSpcAndNtKernelRootStore);
1885	g_hSpcAndNtKernelRootStore = NIL_RTCRSTORE;
1886
1887	RTCrStoreRelease(g_hNtKernelRootStore);
1888	g_hNtKernelRootStore = NIL_RTCRSTORE;
1889	RTCrStoreRelease(g_hSpcRootStore);
1890	g_hSpcRootStore = NIL_RTCRSTORE;
1891	}
1892
1893	#ifdef IN_RING3
1894
1895	/**
1896	* This is a hardcoded list of certificates we thing we might need.
1897	*
1898	* @returns true if wanted, false if not.
1899	* @param pCert The certificate.
1900	*/
1901	static bool supR3HardenedWinIsDesiredRootCA(PCRTCRX509CERTIFICATE pCert)
1902	{
1903	char szSubject[512];
1904	szSubject[sizeof(szSubject) - 1] = '\0';
1905	RTCrX509Name_FormatAsString(&pCert->TbsCertificate.Subject, szSubject, sizeof(szSubject) - 1, NULL);
1906
1907	/*
1908	* Check that it's a plausible root certificate.
1909	*/
1910	if (!RTCrX509Certificate_IsSelfSigned(pCert))
1911	{
1912	SUP_DPRINTF(("supR3HardenedWinIsDesiredRootCA: skipping - not-self-signed: %s\n", szSubject));
1913	return false;
1914	}
1915
1916	if (RTAsn1Integer_UnsignedCompareWithU32(&pCert->TbsCertificate.T0.Version, 3) > 0)
1917	{
1918	if ( !(pCert->TbsCertificate.T3.fExtKeyUsage & RTCRX509CERT_KEY_USAGE_F_KEY_CERT_SIGN)
1919	&& (pCert->TbsCertificate.T3.fFlags & RTCRX509TBSCERTIFICATE_F_PRESENT_KEY_USAGE) )
1920	{
1921	SUP_DPRINTF(("supR3HardenedWinIsDesiredRootCA: skipping - non-cert-sign: %s\n", szSubject));
1922	return false;
1923	}
1924	if ( pCert->TbsCertificate.T3.pBasicConstraints
1925	&& !pCert->TbsCertificate.T3.pBasicConstraints->CA.fValue)
1926	{
1927	SUP_DPRINTF(("supR3HardenedWinIsDesiredRootCA: skipping - non-CA: %s\n", szSubject));
1928	return false;
1929	}
1930	}
1931	if (pCert->TbsCertificate.SubjectPublicKeyInfo.SubjectPublicKey.cBits < 256) /* mostly for u64KeyId reading. */
1932	{
1933	SUP_DPRINTF(("supR3HardenedWinIsDesiredRootCA: skipping - key too small: %u bits %s\n",
1934	pCert->TbsCertificate.SubjectPublicKeyInfo.SubjectPublicKey.cBits, szSubject));
1935	return false;
1936	}
1937	uint64_t const u64KeyId = pCert->TbsCertificate.SubjectPublicKeyInfo.SubjectPublicKey.uBits.pu64[1];
1938
1939	# if 0
1940	/*
1941	* Whitelist - Array of names and key clues of the certificates we want.
1942	*/
1943	static struct
1944	{
1945	uint64_t u64KeyId;
1946	const char *pszName;
1947	} const s_aWanted[] =
1948	{
1949	/* SPC */
1950	{ UINT64_C(0xffffffffffffffff), "C=US, O=VeriSign, Inc., OU=Class 3 Public Primary Certification Authority" },
1951	{ UINT64_C(0xffffffffffffffff), "L=Internet, O=VeriSign, Inc., OU=VeriSign Commercial Software Publishers CA" },
1952	{ UINT64_C(0x491857ead79dde00), "C=US, O=The Go Daddy Group, Inc., OU=Go Daddy Class 2 Certification Authority" },
1953
1954	/* TS */
1955	{ UINT64_C(0xffffffffffffffff), "O=Microsoft Trust Network, OU=Microsoft Corporation, OU=Microsoft Time Stamping Service Root, OU=Copyright (c) 1997 Microsoft Corp." },
1956	{ UINT64_C(0xffffffffffffffff), "O=VeriSign Trust Network, OU=VeriSign, Inc., OU=VeriSign Time Stamping Service Root, OU=NO LIABILITY ACCEPTED, (c)97 VeriSign, Inc." },
1957	{ UINT64_C(0xffffffffffffffff), "C=ZA, ST=Western Cape, L=Durbanville, O=Thawte, OU=Thawte Certification, CN=Thawte Timestamping CA" },
1958
1959	/* Additional Windows 8.1 list: */
1960	{ UINT64_C(0x5ad46780fa5df300), "DC=com, DC=microsoft, CN=Microsoft Root Certificate Authority" },
1961	{ UINT64_C(0x3be670c1bd02a900), "OU=Copyright (c) 1997 Microsoft Corp., OU=Microsoft Corporation, CN=Microsoft Root Authority" },
1962	{ UINT64_C(0x4d3835aa4180b200), "C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Root Certificate Authority 2011" },
1963	{ UINT64_C(0x646e3fe3ba08df00), "C=US, O=MSFT, CN=Microsoft Authenticode(tm) Root Authority" },
1964	{ UINT64_C(0xece4e4289e08b900), "C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Root Certificate Authority 2010" },
1965	{ UINT64_C(0x59faf1086271bf00), "C=US, ST=Arizona, L=Scottsdale, O=GoDaddy.com, Inc., CN=Go Daddy Root Certificate Authority - G2" },
1966	{ UINT64_C(0x3d98ab22bb04a300), "C=IE, O=Baltimore, OU=CyberTrust, CN=Baltimore CyberTrust Root" },
1967	{ UINT64_C(0x91e3728b8b40d000), "C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO Certification Authority" },
1968	{ UINT64_C(0x61a3a33f81aace00), "C=US, ST=UT, L=Salt Lake City, O=The USERTRUST Network, OU=http://www.usertrust.com, CN=UTN-USERFirst-Object" },
1969	{ UINT64_C(0x9e5bc2d78b6a3636), "C=ZA, ST=Western Cape, L=Cape Town, O=Thawte Consulting cc, OU=Certification Services Division, CN=Thawte Premium Server CA, Email=premium-server@thawte.com" },
1970	{ UINT64_C(0xf4fd306318ccda00), "C=US, O=GeoTrust Inc., CN=GeoTrust Global CA" },
1971	{ UINT64_C(0xa0ee62086758b15d), "C=US, O=Equifax, OU=Equifax Secure Certificate Authority" },
1972	{ UINT64_C(0x8ff6fc03c1edbd00), "C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Root Certificate Authority - G2" },
1973	{ UINT64_C(0xa3ce8d99e60eda00), "C=BE, O=GlobalSign nv-sa, OU=Root CA, CN=GlobalSign Root CA" },
1974	{ UINT64_C(0xa671e9fec832b700), "C=US, O=Starfield Technologies, Inc., OU=Starfield Class 2 Certification Authority" },
1975	{ UINT64_C(0xa8de7211e13be200), "C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA" },
1976	{ UINT64_C(0x0ff3891b54348328), "C=US, O=Entrust.net, OU=www.entrust.net/CPS incorp. by ref. (limits liab.), OU=(c) 1999 Entrust.net Limited, CN=Entrust.netSecure Server Certification Authority" },
1977	{ UINT64_C(0x7ae89c50f0b6a00f), "C=US, O=GTE Corporation, OU=GTE CyberTrust Solutions, Inc., CN=GTE CyberTrust Global Root" },
1978	{ UINT64_C(0xd45980fbf0a0ac00), "C=US, O=thawte, Inc., OU=Certification Services Division, OU=(c) 2006 thawte, Inc. - For authorized use only, CN=thawte Primary Root CA" },
1979	{ UINT64_C(0x9e5bc2d78b6a3636), "C=ZA, ST=Western Cape, L=Cape Town, O=Thawte Consulting cc, OU=Certification Services Division, CN=Thawte Premium Server CA, Email=premium-server@thawte.com" },
1980	{ UINT64_C(0x7c4fd32ec1b1ce00), "C=PL, O=Unizeto Sp. z o.o., CN=Certum CA" },
1981	{ UINT64_C(0xd4fbe673e5ccc600), "C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert High Assurance EV Root CA" },
1982	{ UINT64_C(0x16e64d2a56ccf200), "C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., OU=http://certificates.starfieldtech.com/repository/, CN=Starfield Services Root Certificate Authority" },
1983	{ UINT64_C(0x6e2ba21058eedf00), "C=US, ST=UT, L=Salt Lake City, O=The USERTRUST Network, OU=http://www.usertrust.com, CN=UTN - DATACorp SGC" },
1984	{ UINT64_C(0xb28612a94b4dad00), "O=Entrust.net, OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.), OU=(c) 1999 Entrust.net Limited, CN=Entrust.netCertification Authority (2048)" },
1985	{ UINT64_C(0x357a29080824af00), "C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=(c) 2006 VeriSign, Inc. - For authorized use only, CN=VeriSign Class3 Public Primary Certification Authority - G5" },
1986	{ UINT64_C(0x466cbc09db88c100), "C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Certification Authority" },
1987	{ UINT64_C(0x9259c8abe5ca713a), "L=ValiCert Validation Network, O=ValiCert, Inc., OU=ValiCert Class 2 Policy Validation Authority, CN=http://www.valicert.com/, Email=info@valicert.com" },
1988	{ UINT64_C(0x1f78fc529cbacb00), "C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=(c) 1999 VeriSign, Inc. - For authorized use only, CN=VeriSign Class3 Public Primary Certification Authority - G3" },
1989	{ UINT64_C(0x8043e4ce150ead00), "C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Assured ID Root CA" },
1990	{ UINT64_C(0x00f2e6331af7b700), "C=SE, O=AddTrust AB, OU=AddTrust External TTP Network, CN=AddTrust External CA Root" },
1991	};
1992
1993
1994	uint32_t i = RT_ELEMENTS(s_aWanted);
1995	while (i-- > 0)
1996	if ( s_aWanted[i].u64KeyId == u64KeyId
1997	\|\| s_aWanted[i].u64KeyId == UINT64_MAX)
1998	if (RTCrX509Name_MatchWithString(&pCert->TbsCertificate.Subject, s_aWanted[i].pszName))
1999	{
2000	SUP_DPRINTF(("supR3HardenedWinIsDesiredRootCA: Adding %#llx %s\n", u64KeyId, szSubject));
2001	return true;
2002	}
2003
2004	SUP_DPRINTF(("supR3HardenedWinIsDesiredRootCA: skipping %#llx %s\n", u64KeyId, szSubject));
2005	return false;
2006	# else
2007	/*
2008	* Blacklist approach.
2009	*/
2010	static struct
2011	{
2012	uint64_t u64KeyId;
2013	const char *pszName;
2014	} const s_aUnwanted[] =
2015	{
2016	{ UINT64_C(0xffffffffffffffff), "C=US, O=U.S. Robots and Mechanical Men, Inc., OU=V.I.K.I." }, /* dummy entry */
2017	};
2018
2019	uint32_t i = RT_ELEMENTS(s_aUnwanted);
2020	while (i-- > 0)
2021	if ( s_aUnwanted[i].u64KeyId == u64KeyId
2022	\|\| s_aUnwanted[i].u64KeyId == UINT64_MAX)
2023	if (RTCrX509Name_MatchWithString(&pCert->TbsCertificate.Subject, s_aUnwanted[i].pszName))
2024	{
2025	SUP_DPRINTF(("supR3HardenedWinIsDesiredRootCA: skipping - blacklisted: %#llx %s\n", u64KeyId, szSubject));
2026	return false;
2027	}
2028
2029	SUP_DPRINTF(("supR3HardenedWinIsDesiredRootCA: Adding %#llx %s\n", u64KeyId, szSubject));
2030	return true;
2031	# endif
2032	}
2033
2034
2035	/**
2036	* Loads a module in the system32 directory.
2037	*
2038	* @returns Module handle on success. Won't return on failure if fMandatory = true.
2039	* @param pszName The name of the DLL to load.
2040	* @param fMandatory Whether the library is mandatory.
2041	*/
2042	DECLHIDDEN(HMODULE) supR3HardenedWinLoadSystem32Dll(const char *pszName, bool fMandatory)
2043	{
2044	WCHAR wszName[200+60];
2045	UINT cwcDir = GetSystemDirectoryW(wszName, RT_ELEMENTS(wszName) - 60);
2046	wszName[cwcDir] = '\\';
2047	RTUtf16CopyAscii(&wszName[cwcDir + 1], RT_ELEMENTS(wszName) - cwcDir, pszName);
2048
2049	DWORD fFlags = 0;
2050	if (g_uNtVerCombined >= SUP_MAKE_NT_VER_SIMPLE(6, 0))
2051	fFlags = LOAD_LIBRARY_SEARCH_SYSTEM32;
2052	HMODULE hMod = LoadLibraryExW(wszName, NULL, fFlags);
2053	if ( hMod == NULL
2054	&& fFlags
2055	&& g_uNtVerCombined < SUP_MAKE_NT_VER_SIMPLE(6, 2)
2056	&& RtlGetLastWin32Error() == ERROR_INVALID_PARAMETER)
2057	{
2058	fFlags = 0;
2059	hMod = LoadLibraryExW(wszName, NULL, fFlags);
2060	}
2061	if ( hMod == NULL
2062	&& fMandatory)
2063	supR3HardenedFatal("Error loading '%s': %u [%ls]", pszName, RtlGetLastWin32Error(), wszName);
2064	return hMod;
2065	}
2066
2067
2068	/**
2069	* Called by supR3HardenedWinResolveVerifyTrustApiAndHookThreadCreation to
2070	* import selected root CAs from the system certificate store.
2071	*
2072	* These certificates permits us to correctly validate third party DLLs.
2073	*/
2074	static void supR3HardenedWinRetrieveTrustedRootCAs(void)
2075	{
2076	uint32_t cAdded = 0;
2077
2078	/*
2079	* Load crypt32.dll and resolve the APIs we need.
2080	*/
2081	HMODULE hCrypt32 = supR3HardenedWinLoadSystem32Dll("crypt32.dll", true /fMandatory/);
2082
2083	#define RESOLVE_CRYPT32_API(a_Name, a_pfnType) \
2084	a_pfnType pfn##a_Name = (a_pfnType)GetProcAddress(hCrypt32, #a_Name); \
2085	if (pfn##a_Name == NULL) supR3HardenedFatal("Error locating '" #a_Name "' in 'crypt32.dll': %u", RtlGetLastWin32Error())
2086	RESOLVE_CRYPT32_API(CertOpenStore, PFNCERTOPENSTORE);
2087	RESOLVE_CRYPT32_API(CertCloseStore, PFNCERTCLOSESTORE);
2088	RESOLVE_CRYPT32_API(CertEnumCertificatesInStore, PFNCERTENUMCERTIFICATESINSTORE);
2089	#undef RESOLVE_CRYPT32_API
2090
2091	/*
2092	* Open the root store and look for the certificates we wish to use.
2093	*/
2094	DWORD fOpenStore = CERT_STORE_OPEN_EXISTING_FLAG \| CERT_STORE_READONLY_FLAG;
2095	HCERTSTORE hStore = pfnCertOpenStore(CERT_STORE_PROV_SYSTEM_W, PKCS_7_ASN_ENCODING \| X509_ASN_ENCODING,
2096	NULL /* hCryptProv = default */, CERT_SYSTEM_STORE_LOCAL_MACHINE \| fOpenStore, L"Root");
2097	if (!hStore)
2098	hStore = pfnCertOpenStore(CERT_STORE_PROV_SYSTEM_W, PKCS_7_ASN_ENCODING \| X509_ASN_ENCODING,
2099	NULL /* hCryptProv = default */, CERT_SYSTEM_STORE_CURRENT_USER \| fOpenStore, L"Root");
2100	if (hStore)
2101	{
2102	PCCERT_CONTEXT pCurCtx = NULL;
2103	while ((pCurCtx = pfnCertEnumCertificatesInStore(hStore, pCurCtx)) != NULL)
2104	{
2105	if (pCurCtx->dwCertEncodingType & X509_ASN_ENCODING)
2106	{
2107	RTERRINFOSTATIC StaticErrInfo;
2108	RTASN1CURSORPRIMARY PrimaryCursor;
2109	RTAsn1CursorInitPrimary(&PrimaryCursor, pCurCtx->pbCertEncoded, pCurCtx->cbCertEncoded,
2110	RTErrInfoInitStatic(&StaticErrInfo),
2111	&g_RTAsn1DefaultAllocator, RTASN1CURSOR_FLAGS_DER, "CurCtx");
2112	RTCRX509CERTIFICATE MyCert;
2113	int rc = RTCrX509Certificate_DecodeAsn1(&PrimaryCursor.Cursor, 0, &MyCert, "Cert");
2114	if (RT_SUCCESS(rc))
2115	{
2116	if (supR3HardenedWinIsDesiredRootCA(&MyCert))
2117	{
2118	rc = RTCrStoreCertAddEncoded(g_hSpcRootStore, RTCRCERTCTX_F_ENC_X509_DER,
2119	pCurCtx->pbCertEncoded, pCurCtx->cbCertEncoded, NULL /pErrInfo/);
2120	AssertRC(rc);
2121
2122	rc = RTCrStoreCertAddEncoded(g_hSpcAndNtKernelRootStore, RTCRCERTCTX_F_ENC_X509_DER,
2123	pCurCtx->pbCertEncoded, pCurCtx->cbCertEncoded, NULL /pErrInfo/);
2124	AssertRC(rc);
2125	cAdded++;
2126	}
2127
2128	RTCrX509Certificate_Delete(&MyCert);
2129	}
2130	/* XP root certificate "C&W HKT SecureNet CA SGC Root" has non-standard validity
2131	timestamps, the UTC formatting isn't Zulu time but specifies timezone offsets.
2132	Ignore these failures and certificates. */
2133	else if (rc != VERR_ASN1_INVALID_UTC_TIME_ENCODING)
2134	AssertMsgFailed(("RTCrX509Certificate_DecodeAsn1 failed: rc=%#x: %s\n", rc, StaticErrInfo.szMsg));
2135	}
2136	}
2137	pfnCertCloseStore(hStore, CERT_CLOSE_STORE_CHECK_FLAG);
2138	g_fHaveOtherRoots = true;
2139	}
2140	SUP_DPRINTF(("supR3HardenedWinRetrieveTrustedRootCAs: cAdded=%u\n", cAdded));
2141	}
2142
2143
2144	/**
2145	* Resolves the WinVerifyTrust API after the process has been verified and
2146	* installs a thread creation hook.
2147	*
2148	* The WinVerifyTrust API is used in addition our own Authenticode verification
2149	* code. If the image has the IMAGE_DLLCHARACTERISTICS_FORCE_INTEGRITY flag
2150	* set, it will be checked again by the kernel. All our image has this flag set
2151	* and we require all VBox extensions to have it set as well. In effect, the
2152	* authenticode signature will be checked two or three times.
2153	*
2154	* @param pszProgName The program name.
2155	*/
2156	DECLHIDDEN(void) supR3HardenedWinResolveVerifyTrustApiAndHookThreadCreation(const char *pszProgName)
2157	{
2158	# ifdef IN_SUP_HARDENED_R3
2159	/*
2160	* Load our the support library DLL that does the thread hooking as the
2161	* security API may trigger the creation of COM worker threads (or
2162	* whatever they are).
2163	*
2164	* The thread creation hook makes the threads very slippery to debuggers by
2165	* irreversably disabling most (if not all) debug events for them.
2166	*/
2167	char szPath[RTPATH_MAX];
2168	supR3HardenedPathAppSharedLibs(szPath, sizeof(szPath) - sizeof("/VBoxSupLib.DLL"));
2169	suplibHardenedStrCat(szPath, "/VBoxSupLib.DLL");
2170	HMODULE hSupLibMod = (HMODULE)supR3HardenedWinLoadLibrary(szPath, true /fSystem32Only/, 0 /fMainFlags/);
2171	if (hSupLibMod == NULL)
2172	supR3HardenedFatal("Error loading '%s': %u", szPath, RtlGetLastWin32Error());
2173	# endif
2174
2175	/*
2176	* Allocate TLS entry for WinVerifyTrust recursion prevention.
2177	*/
2178	DWORD iTls = TlsAlloc();
2179	if (iTls != TLS_OUT_OF_INDEXES)
2180	g_iTlsWinVerifyTrustRecursion = iTls;
2181	else
2182	supR3HardenedError(RtlGetLastWin32Error(), false /fFatal/, "TlsAlloc failed");
2183
2184	/*
2185	* Resolve the imports we need.
2186	*/
2187	HMODULE hWintrust = supR3HardenedWinLoadSystem32Dll("Wintrust.dll", true /fMandatory/);
2188	#define RESOLVE_CRYPT_API(a_Name, a_pfnType, a_uMinWinVer) \
2189	do { \
2190	g_pfn##a_Name = (a_pfnType)GetProcAddress(hWintrust, #a_Name); \
2191	if (g_pfn##a_Name == NULL && (a_uMinWinVer) < g_uNtVerCombined) \
2192	supR3HardenedFatal("Error locating '" #a_Name "' in 'Wintrust.dll': %u", RtlGetLastWin32Error()); \
2193	} while (0)
2194
2195	PFNWINVERIFYTRUST pfnWinVerifyTrust = (PFNWINVERIFYTRUST)GetProcAddress(hWintrust, "WinVerifyTrust");
2196	if (!pfnWinVerifyTrust)
2197	supR3HardenedFatal("Error locating 'WinVerifyTrust' in 'Wintrust.dll': %u", RtlGetLastWin32Error());
2198
2199	RESOLVE_CRYPT_API(CryptCATAdminAcquireContext, PFNCRYPTCATADMINACQUIRECONTEXT, 0);
2200	RESOLVE_CRYPT_API(CryptCATAdminCalcHashFromFileHandle, PFNCRYPTCATADMINCALCHASHFROMFILEHANDLE, 0);
2201	RESOLVE_CRYPT_API(CryptCATAdminEnumCatalogFromHash, PFNCRYPTCATADMINENUMCATALOGFROMHASH, 0);
2202	RESOLVE_CRYPT_API(CryptCATAdminReleaseCatalogContext, PFNCRYPTCATADMINRELEASECATALOGCONTEXT, 0);
2203	RESOLVE_CRYPT_API(CryptCATAdminReleaseContext, PFNCRYPTCATDADMINRELEASECONTEXT, 0);
2204	RESOLVE_CRYPT_API(CryptCATCatalogInfoFromContext, PFNCRYPTCATCATALOGINFOFROMCONTEXT, 0);
2205
2206	RESOLVE_CRYPT_API(CryptCATAdminAcquireContext2, PFNCRYPTCATADMINACQUIRECONTEXT2, SUP_NT_VER_W80);
2207	RESOLVE_CRYPT_API(CryptCATAdminCalcHashFromFileHandle2, PFNCRYPTCATADMINCALCHASHFROMFILEHANDLE2, SUP_NT_VER_W80);
2208
2209	# ifdef IN_SUP_HARDENED_R3
2210	/*
2211	* Load bcrypt.dll and instantiate a few hashing and signing providers to
2212	* make sure the providers are cached for later us. Avoid recursion issues.
2213	*/
2214	HMODULE hBCrypt = supR3HardenedWinLoadSystem32Dll("bcrypt.dll", false /fMandatory/);
2215	if (hBCrypt)
2216	{
2217	PFNBCRYPTOPENALGORTIHMPROVIDER pfnOpenAlgoProvider;
2218	pfnOpenAlgoProvider = (PFNBCRYPTOPENALGORTIHMPROVIDER)GetProcAddress(hBCrypt, "BCryptOpenAlgorithmProvider");
2219	if (pfnOpenAlgoProvider)
2220	{
2221	SUP_DPRINTF(("bcrypt.dll loaded at %p, BCryptOpenAlgorithmProvider at %p, preloading providers:\n",
2222	hBCrypt, pfnOpenAlgoProvider));
2223	# define PRELOAD_ALGO_PROVIDER(a_Name) \
2224	do { \
2225	BCRYPT_ALG_HANDLE hAlgo = NULL; \
2226	NTSTATUS rcNt = pfnOpenAlgoProvider(&hAlgo, a_Name, NULL, 0); \
2227	SUP_DPRINTF(("%sBCryptOpenAlgorithmProvider(,'%ls',0,0) -> %#x (hAlgo=%p)\n", \
2228	NT_SUCCESS(rcNt) ? " " : "warning: ", a_Name, rcNt, hAlgo)); \
2229	} while (0)
2230	PRELOAD_ALGO_PROVIDER(BCRYPT_MD2_ALGORITHM);
2231	PRELOAD_ALGO_PROVIDER(BCRYPT_MD4_ALGORITHM);
2232	PRELOAD_ALGO_PROVIDER(BCRYPT_MD5_ALGORITHM);
2233	PRELOAD_ALGO_PROVIDER(BCRYPT_SHA1_ALGORITHM);
2234	PRELOAD_ALGO_PROVIDER(BCRYPT_SHA256_ALGORITHM);
2235	PRELOAD_ALGO_PROVIDER(BCRYPT_SHA512_ALGORITHM);
2236	PRELOAD_ALGO_PROVIDER(BCRYPT_RSA_ALGORITHM);
2237	PRELOAD_ALGO_PROVIDER(BCRYPT_DSA_ALGORITHM);
2238	# undef PRELOAD_ALGO_PROVIDER
2239	}
2240	else
2241	SUP_DPRINTF(("Warning! Failed to find BCryptOpenAlgorithmProvider in bcrypt.dll\n"));
2242	}
2243	else
2244	SUP_DPRINTF(("Warning! Failed to load bcrypt.dll\n"));
2245
2246	/*
2247	* Call the verification API on ourselves and ntdll to make sure it works
2248	* and loads more stuff it needs, preventing any recursive fun we'd run
2249	* into after we set g_pfnWinVerifyTrust.
2250	*/
2251	RTERRINFOSTATIC ErrInfoStatic;
2252	RTErrInfoInitStatic(&ErrInfoStatic);
2253	int rc = supR3HardNtViCallWinVerifyTrust(NULL, g_SupLibHardenedExeNtPath.UniStr.Buffer, 0,
2254	&ErrInfoStatic.Core, pfnWinVerifyTrust, NULL);
2255	if (RT_FAILURE(rc))
2256	supR3HardenedFatalMsg(pszProgName, kSupInitOp_Integrity, rc,
2257	"WinVerifyTrust failed on stub executable: %s", ErrInfoStatic.szMsg);
2258	# else
2259	RT_NOREF1(pszProgName);
2260	# endif
2261
2262	if (g_uNtVerCombined >= SUP_MAKE_NT_VER_SIMPLE(6, 0)) /* ntdll isn't signed on XP, assuming this is the case on W2K3 for now. */
2263	supR3HardNtViCallWinVerifyTrust(NULL, L"\\SystemRoot\\System32\\ntdll.dll", 0, NULL, pfnWinVerifyTrust, NULL);
2264	supR3HardNtViCallWinVerifyTrustCatFile(NULL, L"\\SystemRoot\\System32\\ntdll.dll", 0, NULL, pfnWinVerifyTrust);
2265
2266	g_pfnWinVerifyTrust = pfnWinVerifyTrust;
2267	SUP_DPRINTF(("g_pfnWinVerifyTrust=%p\n", pfnWinVerifyTrust));
2268
2269	# ifdef IN_SUP_HARDENED_R3
2270	/*
2271	* Load some problematic DLLs into the verifier cache to prevent
2272	* recursion trouble.
2273	*/
2274	supR3HardenedWinVerifyCachePreload(L"\\SystemRoot\\System32\\crypt32.dll");
2275	supR3HardenedWinVerifyCachePreload(L"\\SystemRoot\\System32\\Wintrust.dll");
2276	# endif
2277
2278	/*
2279	* Now, get trusted root CAs so we can verify a broader scope of signatures.
2280	*/
2281	supR3HardenedWinRetrieveTrustedRootCAs();
2282	}
2283
2284
2285	static int supR3HardNtViNtToWinPath(PCRTUTF16 pwszNtName, PCRTUTF16 *ppwszWinPath,
2286	PRTUTF16 pwszWinPathBuf, size_t cwcWinPathBuf)
2287	{
2288	static const RTUTF16 s_wszPrefix[] = L"\\\\.\\GLOBALROOT";
2289
2290	if (pwszNtName != '\\' && pwszNtName != '/')
2291	return VERR_PATH_DOES_NOT_START_WITH_ROOT;
2292
2293	size_t cwcNtName = RTUtf16Len(pwszNtName);
2294	if (RT_ELEMENTS(s_wszPrefix) + cwcNtName > cwcWinPathBuf)
2295	return VERR_FILENAME_TOO_LONG;
2296
2297	memcpy(pwszWinPathBuf, s_wszPrefix, sizeof(s_wszPrefix));
2298	memcpy(&pwszWinPathBuf[sizeof(s_wszPrefix) / sizeof(RTUTF16) - 1], pwszNtName, (cwcNtName + 1) * sizeof(RTUTF16));
2299	*ppwszWinPath = pwszWinPathBuf;
2300	return VINF_SUCCESS;
2301	}
2302
2303
2304	/**
2305	* Calls WinVerifyTrust to verify an PE image.
2306	*
2307	* @returns VBox status code.
2308	* @param hFile File handle to the executable file.
2309	* @param pwszName Full NT path to the DLL in question, used for
2310	* dealing with unsigned system dlls as well as for
2311	* error/logging.
2312	* @param fFlags Flags, SUPHNTVI_F_XXX.
2313	* @param pErrInfo Pointer to error info structure. Optional.
2314	* @param pfnWinVerifyTrust Pointer to the API.
2315	* @param phrcWinVerifyTrust Where to WinVerifyTrust error status on failure,
2316	* optional.
2317	*/
2318	static int supR3HardNtViCallWinVerifyTrust(HANDLE hFile, PCRTUTF16 pwszName, uint32_t fFlags, PRTERRINFO pErrInfo,
2319	PFNWINVERIFYTRUST pfnWinVerifyTrust, HRESULT *phrcWinVerifyTrust)
2320	{
2321	RT_NOREF1(fFlags);
2322	if (phrcWinVerifyTrust)
2323	*phrcWinVerifyTrust = S_OK;
2324
2325	/*
2326	* Convert the name into a Windows name.
2327	*/
2328	RTUTF16 wszWinPathBuf[MAX_PATH];
2329	PCRTUTF16 pwszWinPath;
2330	int rc = supR3HardNtViNtToWinPath(pwszName, &pwszWinPath, wszWinPathBuf, RT_ELEMENTS(wszWinPathBuf));
2331	if (RT_FAILURE(rc))
2332	return RTErrInfoSetF(pErrInfo, rc, "Bad path passed to supR3HardNtViCallWinVerifyTrust: rc=%Rrc '%ls'", rc, pwszName);
2333
2334	/*
2335	* Construct input parameters and call the API.
2336	*/
2337	WINTRUST_FILE_INFO FileInfo;
2338	RT_ZERO(FileInfo);
2339	FileInfo.cbStruct = sizeof(FileInfo);
2340	FileInfo.pcwszFilePath = pwszWinPath;
2341	FileInfo.hFile = hFile;
2342
2343	GUID PolicyActionGuid = WINTRUST_ACTION_GENERIC_VERIFY_V2;
2344
2345	WINTRUST_DATA TrustData;
2346	RT_ZERO(TrustData);
2347	TrustData.cbStruct = sizeof(TrustData);
2348	TrustData.fdwRevocationChecks = WTD_REVOKE_NONE; /* Keep simple for now. */
2349	TrustData.dwStateAction = WTD_STATEACTION_VERIFY;
2350	TrustData.dwUIChoice = WTD_UI_NONE;
2351	TrustData.dwProvFlags = 0;
2352	if (g_uNtVerCombined >= SUP_MAKE_NT_VER_SIMPLE(6, 0))
2353	TrustData.dwProvFlags = WTD_CACHE_ONLY_URL_RETRIEVAL;
2354	else
2355	TrustData.dwProvFlags = WTD_REVOCATION_CHECK_NONE;
2356	TrustData.dwUnionChoice = WTD_CHOICE_FILE;
2357	TrustData.pFile = &FileInfo;
2358
2359	HRESULT hrc = pfnWinVerifyTrust(NULL /hwnd/, &PolicyActionGuid, &TrustData);
2360	if (hrc == S_OK)
2361	rc = VINF_SUCCESS;
2362	else
2363	{
2364	/*
2365	* Failed. Format a nice error message.
2366	*/
2367	# ifdef DEBUG_bird
2368	if (hrc != CERT_E_CHAINING /* Un-updated vistas, XPs, ++ */)
2369	__debugbreak();
2370	# endif
2371	const char *pszErrConst = NULL;
2372	switch (hrc)
2373	{
2374	case TRUST_E_SYSTEM_ERROR: pszErrConst = "TRUST_E_SYSTEM_ERROR"; break;
2375	case TRUST_E_NO_SIGNER_CERT: pszErrConst = "TRUST_E_NO_SIGNER_CERT"; break;
2376	case TRUST_E_COUNTER_SIGNER: pszErrConst = "TRUST_E_COUNTER_SIGNER"; break;
2377	case TRUST_E_CERT_SIGNATURE: pszErrConst = "TRUST_E_CERT_SIGNATURE"; break;
2378	case TRUST_E_TIME_STAMP: pszErrConst = "TRUST_E_TIME_STAMP"; break;
2379	case TRUST_E_BAD_DIGEST: pszErrConst = "TRUST_E_BAD_DIGEST"; break;
2380	case TRUST_E_BASIC_CONSTRAINTS: pszErrConst = "TRUST_E_BASIC_CONSTRAINTS"; break;
2381	case TRUST_E_FINANCIAL_CRITERIA: pszErrConst = "TRUST_E_FINANCIAL_CRITERIA"; break;
2382	case TRUST_E_PROVIDER_UNKNOWN: pszErrConst = "TRUST_E_PROVIDER_UNKNOWN"; break;
2383	case TRUST_E_ACTION_UNKNOWN: pszErrConst = "TRUST_E_ACTION_UNKNOWN"; break;
2384	case TRUST_E_SUBJECT_FORM_UNKNOWN: pszErrConst = "TRUST_E_SUBJECT_FORM_UNKNOWN"; break;
2385	case TRUST_E_SUBJECT_NOT_TRUSTED: pszErrConst = "TRUST_E_SUBJECT_NOT_TRUSTED"; break;
2386	case TRUST_E_NOSIGNATURE: pszErrConst = "TRUST_E_NOSIGNATURE"; break;
2387	case TRUST_E_FAIL: pszErrConst = "TRUST_E_FAIL"; break;
2388	case TRUST_E_EXPLICIT_DISTRUST: pszErrConst = "TRUST_E_EXPLICIT_DISTRUST"; break;
2389	case CERT_E_EXPIRED: pszErrConst = "CERT_E_EXPIRED"; break;
2390	case CERT_E_VALIDITYPERIODNESTING: pszErrConst = "CERT_E_VALIDITYPERIODNESTING"; break;
2391	case CERT_E_ROLE: pszErrConst = "CERT_E_ROLE"; break;
2392	case CERT_E_PATHLENCONST: pszErrConst = "CERT_E_PATHLENCONST"; break;
2393	case CERT_E_CRITICAL: pszErrConst = "CERT_E_CRITICAL"; break;
2394	case CERT_E_PURPOSE: pszErrConst = "CERT_E_PURPOSE"; break;
2395	case CERT_E_ISSUERCHAINING: pszErrConst = "CERT_E_ISSUERCHAINING"; break;
2396	case CERT_E_MALFORMED: pszErrConst = "CERT_E_MALFORMED"; break;
2397	case CERT_E_UNTRUSTEDROOT: pszErrConst = "CERT_E_UNTRUSTEDROOT"; break;
2398	case CERT_E_CHAINING: pszErrConst = "CERT_E_CHAINING"; break;
2399	case CERT_E_REVOKED: pszErrConst = "CERT_E_REVOKED"; break;
2400	case CERT_E_UNTRUSTEDTESTROOT: pszErrConst = "CERT_E_UNTRUSTEDTESTROOT"; break;
2401	case CERT_E_REVOCATION_FAILURE: pszErrConst = "CERT_E_REVOCATION_FAILURE"; break;
2402	case CERT_E_CN_NO_MATCH: pszErrConst = "CERT_E_CN_NO_MATCH"; break;
2403	case CERT_E_WRONG_USAGE: pszErrConst = "CERT_E_WRONG_USAGE"; break;
2404	case CERT_E_UNTRUSTEDCA: pszErrConst = "CERT_E_UNTRUSTEDCA"; break;
2405	case CERT_E_INVALID_POLICY: pszErrConst = "CERT_E_INVALID_POLICY"; break;
2406	case CERT_E_INVALID_NAME: pszErrConst = "CERT_E_INVALID_NAME"; break;
2407	case CRYPT_E_FILE_ERROR: pszErrConst = "CRYPT_E_FILE_ERROR"; break;
2408	case CRYPT_E_REVOKED: pszErrConst = "CRYPT_E_REVOKED"; break;
2409	}
2410	if (pszErrConst)
2411	rc = RTErrInfoSetF(pErrInfo, VERR_LDRVI_UNSUPPORTED_ARCH,
2412	"WinVerifyTrust failed with hrc=%s on '%ls'", pszErrConst, pwszName);
2413	else
2414	rc = RTErrInfoSetF(pErrInfo, VERR_LDRVI_UNSUPPORTED_ARCH,
2415	"WinVerifyTrust failed with hrc=%Rhrc on '%ls'", hrc, pwszName);
2416	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrust: WinVerifyTrust failed with %#x (%s) on '%ls'\n",
2417	hrc, pszErrConst, pwszName));
2418	if (phrcWinVerifyTrust)
2419	*phrcWinVerifyTrust = hrc;
2420	}
2421
2422	/* clean up state data. */
2423	TrustData.dwStateAction = WTD_STATEACTION_CLOSE;
2424	FileInfo.hFile = NULL;
2425	hrc = pfnWinVerifyTrust(NULL /hwnd/, &PolicyActionGuid, &TrustData);
2426
2427	return rc;
2428	}
2429
2430
2431	/**
2432	* Calls WinVerifyTrust to verify an PE image via catalog files.
2433	*
2434	* @returns VBox status code.
2435	* @param hFile File handle to the executable file.
2436	* @param pwszName Full NT path to the DLL in question, used for
2437	* dealing with unsigned system dlls as well as for
2438	* error/logging.
2439	* @param fFlags Flags, SUPHNTVI_F_XXX.
2440	* @param pErrInfo Pointer to error info structure. Optional.
2441	* @param pfnWinVerifyTrust Pointer to the API.
2442	*/
2443	static int supR3HardNtViCallWinVerifyTrustCatFile(HANDLE hFile, PCRTUTF16 pwszName, uint32_t fFlags, PRTERRINFO pErrInfo,
2444	PFNWINVERIFYTRUST pfnWinVerifyTrust)
2445	{
2446	RT_NOREF1(fFlags);
2447	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: hFile=%p pwszName=%ls\n", hFile, pwszName));
2448
2449	/*
2450	* Convert the name into a Windows name.
2451	*/
2452	RTUTF16 wszWinPathBuf[MAX_PATH];
2453	PCRTUTF16 pwszWinPath;
2454	int rc = supR3HardNtViNtToWinPath(pwszName, &pwszWinPath, wszWinPathBuf, RT_ELEMENTS(wszWinPathBuf));
2455	if (RT_FAILURE(rc))
2456	return RTErrInfoSetF(pErrInfo, rc, "Bad path passed to supR3HardNtViCallWinVerifyTrustCatFile: rc=%Rrc '%ls'", rc, pwszName);
2457
2458	/*
2459	* Open the file if we didn't get a handle.
2460	*/
2461	HANDLE hFileClose = NULL;
2462	if (hFile == RTNT_INVALID_HANDLE_VALUE \|\| hFile == NULL)
2463	{
2464	hFile = RTNT_INVALID_HANDLE_VALUE;
2465	IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER;
2466
2467	UNICODE_STRING NtName;
2468	NtName.Buffer = (PWSTR)pwszName;
2469	NtName.Length = (USHORT)(RTUtf16Len(pwszName) * sizeof(WCHAR));
2470	NtName.MaximumLength = NtName.Length + sizeof(WCHAR);
2471
2472	OBJECT_ATTRIBUTES ObjAttr;
2473	InitializeObjectAttributes(&ObjAttr, &NtName, OBJ_CASE_INSENSITIVE, NULL /hRootDir/, NULL /pSecDesc/);
2474
2475	NTSTATUS rcNt = NtCreateFile(&hFile,
2476	FILE_READ_DATA \| READ_CONTROL \| SYNCHRONIZE,
2477	&ObjAttr,
2478	&Ios,
2479	NULL /* Allocation Size*/,
2480	FILE_ATTRIBUTE_NORMAL,
2481	FILE_SHARE_READ,
2482	FILE_OPEN,
2483	FILE_NON_DIRECTORY_FILE \| FILE_SYNCHRONOUS_IO_NONALERT,
2484	NULL /EaBuffer/,
2485	0 /EaLength/);
2486	if (NT_SUCCESS(rcNt))
2487	rcNt = Ios.Status;
2488	if (!NT_SUCCESS(rcNt))
2489	return RTErrInfoSetF(pErrInfo, RTErrConvertFromNtStatus(rcNt),
2490	"NtCreateFile returned %#x opening '%ls'.", rcNt, pwszName);
2491	hFileClose = hFile;
2492	}
2493
2494	/*
2495	* On Windows 8.0 and later there are more than one digest choice.
2496	*/
2497	int fNoSignedCatalogFound = -1;
2498	rc = VERR_LDRVI_NOT_SIGNED;
2499	static struct
2500	{
2501	/** The digest algorithm name. */
2502	const WCHAR *pszAlgorithm;
2503	/** Cached catalog admin handle. */
2504	HCATADMIN volatile hCachedCatAdmin;
2505	} s_aHashes[] =
2506	{
2507	{ NULL, NULL },
2508	{ L"SHA256", NULL },
2509	};
2510	for (uint32_t i = 0; i < RT_ELEMENTS(s_aHashes); i++)
2511	{
2512	/*
2513	* Another loop for dealing with different trust provider policies
2514	* required for successfully validating different catalog signatures.
2515	*/
2516	bool fTryNextPolicy;
2517	uint32_t iPolicy = 0;
2518	static const GUID s_aPolicies[] =
2519	{
2520	DRIVER_ACTION_VERIFY, /* Works with microsoft bits. Most frequently used, thus first. */
2521	WINTRUST_ACTION_GENERIC_VERIFY_V2, /* Works with ATI and other SPC kernel-code signed stuff. */
2522	};
2523	do
2524	{
2525	/*
2526	* Create a context.
2527	*/
2528	fTryNextPolicy = false;
2529	bool fFreshContext = false;
2530	BOOL fRc;
2531	HCATADMIN hCatAdmin = ASMAtomicXchgPtr(&s_aHashes[i].hCachedCatAdmin, NULL);
2532	if (hCatAdmin)
2533	{
2534	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: Cached context %p\n", hCatAdmin));
2535	fFreshContext = false;
2536	fRc = TRUE;
2537	}
2538	else
2539	{
2540	l_fresh_context:
2541	fFreshContext = true;
2542	if (g_pfnCryptCATAdminAcquireContext2)
2543	fRc = g_pfnCryptCATAdminAcquireContext2(&hCatAdmin, &s_aPolicies[iPolicy], s_aHashes[i].pszAlgorithm,
2544	NULL /pStrongHashPolicy/, 0 /dwFlags/);
2545	else
2546	fRc = g_pfnCryptCATAdminAcquireContext(&hCatAdmin, &s_aPolicies[iPolicy], 0 /dwFlags/);
2547	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: New context %p\n", hCatAdmin));
2548	}
2549	if (fRc)
2550	{
2551	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: hCatAdmin=%p\n", hCatAdmin));
2552
2553	/*
2554	* Hash the file.
2555	*/
2556	BYTE abHash[SUPHARDNTVI_MAX_CAT_HASH_SIZE];
2557	DWORD cbHash = sizeof(abHash);
2558	if (g_pfnCryptCATAdminCalcHashFromFileHandle2)
2559	fRc = g_pfnCryptCATAdminCalcHashFromFileHandle2(hCatAdmin, hFile, &cbHash, abHash, 0 /dwFlags/);
2560	else
2561	fRc = g_pfnCryptCATAdminCalcHashFromFileHandle(hFile, &cbHash, abHash, 0 /dwFlags/);
2562	if (fRc)
2563	{
2564	/* Produce a string version of it that we can pass to WinVerifyTrust. */
2565	RTUTF16 wszDigest[SUPHARDNTVI_MAX_CAT_HASH_SIZE * 2 + 1];
2566	int rc2 = RTUtf16PrintHexBytes(wszDigest, RT_ELEMENTS(wszDigest), abHash, cbHash, RTSTRPRINTHEXBYTES_F_UPPER);
2567	if (RT_SUCCESS(rc2))
2568	{
2569	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: cbHash=%u wszDigest=%ls\n", cbHash, wszDigest));
2570
2571	/*
2572	* Enumerate catalog information that matches the hash.
2573	*/
2574	uint32_t iCat = 0;
2575	HCATINFO hCatInfoPrev = NULL;
2576	do
2577	{
2578	/* Get the next match. */
2579	HCATINFO hCatInfo = g_pfnCryptCATAdminEnumCatalogFromHash(hCatAdmin, abHash, cbHash, 0, &hCatInfoPrev);
2580	if (!hCatInfo)
2581	{
2582	if (!fFreshContext)
2583	{
2584	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: Retrying with fresh context (CryptCATAdminEnumCatalogFromHash -> %u; iCat=%#x)\n", RtlGetLastWin32Error(), iCat));
2585	if (hCatInfoPrev != NULL)
2586	g_pfnCryptCATAdminReleaseCatalogContext(hCatAdmin, hCatInfoPrev, 0 /dwFlags/);
2587	g_pfnCryptCATAdminReleaseContext(hCatAdmin, 0 /dwFlags/);
2588	goto l_fresh_context;
2589	}
2590	ULONG ulErr = RtlGetLastWin32Error();
2591	fNoSignedCatalogFound = ulErr == ERROR_NOT_FOUND && fNoSignedCatalogFound != 0;
2592	if (iCat == 0)
2593	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: CryptCATAdminEnumCatalogFromHash failed ERRROR_NOT_FOUND (%u)\n", ulErr));
2594	else if (iCat == 0)
2595	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: CryptCATAdminEnumCatalogFromHash failed %u\n", ulErr));
2596	break;
2597	}
2598	fNoSignedCatalogFound = 0;
2599	Assert(hCatInfoPrev == NULL);
2600	hCatInfoPrev = hCatInfo;
2601
2602	/*
2603	* Call WinVerifyTrust.
2604	*/
2605	CATALOG_INFO CatInfo;
2606	CatInfo.cbStruct = sizeof(CatInfo);
2607	CatInfo.wszCatalogFile[0] = '\0';
2608	if (g_pfnCryptCATCatalogInfoFromContext(hCatInfo, &CatInfo, 0 /dwFlags/))
2609	{
2610	WINTRUST_CATALOG_INFO WtCatInfo;
2611	RT_ZERO(WtCatInfo);
2612	WtCatInfo.cbStruct = sizeof(WtCatInfo);
2613	WtCatInfo.dwCatalogVersion = 0;
2614	WtCatInfo.pcwszCatalogFilePath = CatInfo.wszCatalogFile;
2615	WtCatInfo.pcwszMemberTag = wszDigest;
2616	WtCatInfo.pcwszMemberFilePath = pwszWinPath;
2617	WtCatInfo.pbCalculatedFileHash = abHash;
2618	WtCatInfo.cbCalculatedFileHash = cbHash;
2619	WtCatInfo.pcCatalogContext = NULL;
2620
2621	WINTRUST_DATA TrustData;
2622	RT_ZERO(TrustData);
2623	TrustData.cbStruct = sizeof(TrustData);
2624	TrustData.fdwRevocationChecks = WTD_REVOKE_NONE; /* Keep simple for now. */
2625	TrustData.dwStateAction = WTD_STATEACTION_VERIFY;
2626	TrustData.dwUIChoice = WTD_UI_NONE;
2627	TrustData.dwProvFlags = 0;
2628	if (g_uNtVerCombined >= SUP_MAKE_NT_VER_SIMPLE(6, 0))
2629	TrustData.dwProvFlags = WTD_CACHE_ONLY_URL_RETRIEVAL;
2630	else
2631	TrustData.dwProvFlags = WTD_REVOCATION_CHECK_NONE;
2632	TrustData.dwUnionChoice = WTD_CHOICE_CATALOG;
2633	TrustData.pCatalog = &WtCatInfo;
2634
2635	HRESULT hrc = pfnWinVerifyTrust(NULL /hwnd/, &s_aPolicies[iPolicy], &TrustData);
2636	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: WinVerifyTrust => %#x; cat='%ls'; file='%ls'\n",
2637	hrc, CatInfo.wszCatalogFile, pwszName));
2638
2639	if (SUCCEEDED(hrc))
2640	rc = VINF_SUCCESS;
2641	else if (hrc == TRUST_E_NOSIGNATURE)
2642	{ /* ignore because it's useless. */ }
2643	else if (hrc == ERROR_INVALID_PARAMETER)
2644	{ /* This is returned if the given file isn't found in the catalog, it seems. */ }
2645	else
2646	{
2647	rc = RTErrInfoSetF(pErrInfo, VERR_SUP_VP_WINTRUST_CAT_FAILURE,
2648	"WinVerifyTrust failed with hrc=%#x on '%ls' and .cat-file='%ls'.",
2649	hrc, pwszWinPath, CatInfo.wszCatalogFile);
2650	fTryNextPolicy \|= (hrc == CERT_E_UNTRUSTEDROOT);
2651	}
2652
2653	/* clean up state data. */
2654	TrustData.dwStateAction = WTD_STATEACTION_CLOSE;
2655	hrc = pfnWinVerifyTrust(NULL /hwnd/, &s_aPolicies[iPolicy], &TrustData);
2656	Assert(SUCCEEDED(hrc));
2657	}
2658	else
2659	{
2660	rc = RTErrInfoSetF(pErrInfo, RTErrConvertFromWin32(RtlGetLastWin32Error()),
2661	"CryptCATCatalogInfoFromContext failed: %d [file=%s]",
2662	RtlGetLastWin32Error(), pwszName);
2663	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile: CryptCATCatalogInfoFromContext failed\n"));
2664	}
2665	iCat++;
2666	} while (rc == VERR_LDRVI_NOT_SIGNED && iCat < 128);
2667
2668	if (hCatInfoPrev != NULL)
2669	if (!g_pfnCryptCATAdminReleaseCatalogContext(hCatAdmin, hCatInfoPrev, 0 /dwFlags/))
2670	AssertFailed();
2671	}
2672	else
2673	rc = RTErrInfoSetF(pErrInfo, rc2, "RTUtf16PrintHexBytes failed: %Rrc", rc);
2674	}
2675	else
2676	rc = RTErrInfoSetF(pErrInfo, RTErrConvertFromWin32(RtlGetLastWin32Error()),
2677	"CryptCATAdminCalcHashFromFileHandle[2] failed: %d [file=%s]", RtlGetLastWin32Error(), pwszName);
2678
2679	if (!ASMAtomicCmpXchgPtr(&s_aHashes[i].hCachedCatAdmin, hCatAdmin, NULL))
2680	if (!g_pfnCryptCATAdminReleaseContext(hCatAdmin, 0 /dwFlags/))
2681	AssertFailed();
2682	}
2683	else
2684	rc = RTErrInfoSetF(pErrInfo, RTErrConvertFromWin32(RtlGetLastWin32Error()),
2685	"CryptCATAdminAcquireContext[2] failed: %d [file=%s]", RtlGetLastWin32Error(), pwszName);
2686	iPolicy++;
2687	} while ( fTryNextPolicy
2688	&& iPolicy < RT_ELEMENTS(s_aPolicies));
2689
2690	/*
2691	* Only repeat if we've got g_pfnCryptCATAdminAcquireContext2 and can specify the hash algorithm.
2692	*/
2693	if (!g_pfnCryptCATAdminAcquireContext2)
2694	break;
2695	if (rc != VERR_LDRVI_NOT_SIGNED)
2696	break;
2697	}
2698
2699	if (hFileClose != NULL)
2700	NtClose(hFileClose);
2701
2702	/*
2703	* DLLs that are likely candidates for local modifications.
2704	*/
2705	if (rc == VERR_LDRVI_NOT_SIGNED)
2706	{
2707	bool fCoreSystemDll = false;
2708	PCRTUTF16 pwsz;
2709	uint32_t cwcName = (uint32_t)RTUtf16Len(pwszName);
2710	uint32_t cwcOther = g_System32NtPath.UniStr.Length / sizeof(WCHAR);
2711	if (supHardViUtf16PathStartsWithEx(pwszName, cwcName, g_System32NtPath.UniStr.Buffer, cwcOther, true /fCheckSlash/))
2712	{
2713	pwsz = pwszName + cwcOther + 1;
2714	if ( supHardViUtf16PathIsEqual(pwsz, "uxtheme.dll")
2715	\|\| supHardViUtf16PathIsEqual(pwsz, "user32.dll")
2716	\|\| supHardViUtf16PathIsEqual(pwsz, "gdi32.dll")
2717	\|\| supHardViUtf16PathIsEqual(pwsz, "opengl32.dll")
2718	\|\| (fCoreSystemDll = supHardViUtf16PathIsEqual(pwsz, "KernelBase.dll"))
2719	\|\| (fCoreSystemDll = supHardViUtf16PathIsEqual(pwsz, "kernel32.dll"))
2720	\|\| (fCoreSystemDll = supHardViUtf16PathIsEqual(pwsz, "ntdll.dll"))
2721	)
2722	{
2723	if (RTErrInfoIsSet(pErrInfo))
2724	RTErrInfoAdd(pErrInfo, rc, "\n");
2725	RTErrInfoAddF(pErrInfo, rc, "'%ls' is most likely modified.", pwszName);
2726	}
2727	}
2728
2729	/* Kludge for ancient windows versions we don't want to support but
2730	users still wants to use. Keep things as safe as possible without
2731	unnecessary effort. Problem is that 3rd party catalog files cannot
2732	easily be found. Showstopper for ATI users. */
2733	if ( fNoSignedCatalogFound == 1
2734	&& g_uNtVerCombined < SUP_NT_VER_VISTA
2735	&& !fCoreSystemDll)
2736	{
2737	rc = VINF_LDRVI_NOT_SIGNED;
2738	}
2739	}
2740
2741	return rc;
2742	}
2743
2744
2745	/**
2746	* Verifies the given image using WinVerifyTrust in some way.
2747	*
2748	* This is used by supHardenedWinVerifyImageByLdrMod as well as
2749	* supR3HardenedScreenImage.
2750	*
2751	* @returns IPRT status code, modified @a rc.
2752	* @param hFile Handle of the file to verify.
2753	* @param pwszName Full NT path to the DLL in question, used for
2754	* dealing with unsigned system dlls as well as for
2755	* error/logging.
2756	* @param fFlags SUPHNTVI_F_XXX.
2757	* @param rc The current status code.
2758	* @param pfWinVerifyTrust Where to return whether WinVerifyTrust was
2759	* actually used.
2760	* @param pErrInfo Pointer to error info structure. Optional.
2761	*/
2762	DECLHIDDEN(int) supHardenedWinVerifyImageTrust(HANDLE hFile, PCRTUTF16 pwszName, uint32_t fFlags, int rc,
2763	bool *pfWinVerifyTrust, PRTERRINFO pErrInfo)
2764	{
2765	if (pfWinVerifyTrust)
2766	*pfWinVerifyTrust = false;
2767
2768	/*
2769	* Call the windows verify trust API if we've resolved it and aren't in
2770	* some obvious recursion.
2771	*/
2772	if (g_pfnWinVerifyTrust != NULL)
2773	{
2774	uint32_t const idCurrentThread = RTNtCurrentThreadId();
2775
2776	/* Check if loader lock owner. */
2777	struct _RTL_CRITICAL_SECTION volatile *pLoaderLock = NtCurrentPeb()->LoaderLock;
2778	bool fOwnsLoaderLock = pLoaderLock
2779	&& pLoaderLock->OwningThread == (HANDLE)(uintptr_t)idCurrentThread
2780	&& pLoaderLock->RecursionCount > 0;
2781	if (!fOwnsLoaderLock)
2782	{
2783	/* Check for recursion. */
2784	bool fNoRecursion;
2785	if (g_iTlsWinVerifyTrustRecursion != UINT32_MAX)
2786	{
2787	fNoRecursion = TlsGetValue(g_iTlsWinVerifyTrustRecursion) == 0;
2788	if (fNoRecursion)
2789	TlsSetValue(g_iTlsWinVerifyTrustRecursion, (void *)1);
2790	}
2791	else
2792	fNoRecursion = ASMAtomicCmpXchgU32(&g_idActiveThread, idCurrentThread, UINT32_MAX);
2793
2794	if (fNoRecursion && !fOwnsLoaderLock)
2795	{
2796	/* We can call WinVerifyTrust. */
2797	if (pfWinVerifyTrust)
2798	*pfWinVerifyTrust = true;
2799
2800	if (rc != VERR_LDRVI_NOT_SIGNED)
2801	{
2802	if (rc == VINF_LDRVI_NOT_SIGNED)
2803	{
2804	if (fFlags & SUPHNTVI_F_ALLOW_CAT_FILE_VERIFICATION)
2805	{
2806	int rc2 = supR3HardNtViCallWinVerifyTrustCatFile(hFile, pwszName, fFlags, pErrInfo,
2807	g_pfnWinVerifyTrust);
2808	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile -> %d (org %d)\n", rc2, rc));
2809	rc = rc2;
2810	}
2811	else
2812	{
2813	AssertFailed();
2814	rc = VERR_LDRVI_NOT_SIGNED;
2815	}
2816	}
2817	else if (RT_SUCCESS(rc))
2818	{
2819	HRESULT hrcWinVerifyTrust;
2820	rc = supR3HardNtViCallWinVerifyTrust(hFile, pwszName, fFlags, pErrInfo, g_pfnWinVerifyTrust,
2821	&hrcWinVerifyTrust);
2822
2823	/* DLLs signed with special roots, like "Microsoft Digital Media Authority 2005",
2824	may fail here because the root cert is not in the normal certificate stores
2825	(if any). Our verification code has the basics of these certificates included
2826	and can verify them, which is why we end up here instead of in the
2827	VINF_LDRVI_NOT_SIGNED case above. Current workaround is to do as above.
2828	(Intel graphics driver DLLs, like igdusc64.dll. */
2829	if ( RT_FAILURE(rc)
2830	&& hrcWinVerifyTrust == CERT_E_CHAINING
2831	&& (fFlags & SUPHNTVI_F_ALLOW_CAT_FILE_VERIFICATION))
2832	{
2833	rc = supR3HardNtViCallWinVerifyTrustCatFile(hFile, pwszName, fFlags, pErrInfo, g_pfnWinVerifyTrust);
2834	SUP_DPRINTF(("supR3HardNtViCallWinVerifyTrustCatFile -> %d (was CERT_E_CHAINING)\n", rc));
2835	}
2836	}
2837	else
2838	{
2839	int rc2 = supR3HardNtViCallWinVerifyTrust(hFile, pwszName, fFlags, pErrInfo, g_pfnWinVerifyTrust, NULL);
2840	AssertMsg(RT_FAILURE_NP(rc2),
2841	("rc=%Rrc, rc2=%Rrc %s", rc, rc2, pErrInfo ? pErrInfo->pszMsg : "<no-err-info>"));
2842	RT_NOREF_PV(rc2);
2843	}
2844	}
2845
2846	/* Unwind recursion. */
2847	if (g_iTlsWinVerifyTrustRecursion != UINT32_MAX)
2848	TlsSetValue(g_iTlsWinVerifyTrustRecursion, (void *)0);
2849	else
2850	ASMAtomicWriteU32(&g_idActiveThread, UINT32_MAX);
2851	}
2852	/*
2853	* No can do.
2854	*/
2855	else
2856	SUP_DPRINTF(("Detected WinVerifyTrust recursion: rc=%Rrc '%ls'.\n", rc, pwszName));
2857	}
2858	else
2859	SUP_DPRINTF(("Detected loader lock ownership: rc=%Rrc '%ls'.\n", rc, pwszName));
2860	}
2861	return rc;
2862	}
2863
2864
2865	/**
2866	* Checks if WinVerifyTrust is callable on the current thread.
2867	*
2868	* Used by the main code to figure whether it makes sense to try revalidate an
2869	* image that hasn't passed thru WinVerifyTrust yet.
2870	*
2871	* @returns true if callable on current thread, false if not.
2872	*/
2873	DECLHIDDEN(bool) supHardenedWinIsWinVerifyTrustCallable(void)
2874	{
2875	return g_pfnWinVerifyTrust != NULL
2876	&& ( g_iTlsWinVerifyTrustRecursion != UINT32_MAX
2877	? (uintptr_t)TlsGetValue(g_iTlsWinVerifyTrustRecursion) == 0
2878	: g_idActiveThread != RTNtCurrentThreadId() );
2879	}
2880
2881
2882
2883	/**
2884	* Initializes g_uNtVerCombined and g_NtVerInfo.
2885	* Called from suplibHardenedWindowsMain and suplibOsInit.
2886	*/
2887	DECLHIDDEN(void) supR3HardenedWinInitVersion(bool fEarly)
2888	{
2889	/*
2890	* Get the windows version. Use RtlGetVersion as GetVersionExW and
2891	* GetVersion might not be telling the whole truth (8.0 on 8.1 depending on
2892	* the application manifest).
2893	*
2894	* Note! Windows 10 build 14267+ touches BSS when calling RtlGetVersion, so we
2895	* have to use the fallback for the call from the early init code.
2896	*/
2897	OSVERSIONINFOEXW NtVerInfo;
2898
2899	RT_ZERO(NtVerInfo);
2900	NtVerInfo.dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
2901	if ( fEarly
2902	\|\| !NT_SUCCESS(RtlGetVersion((PRTL_OSVERSIONINFOW)&NtVerInfo)))
2903	{
2904	RT_ZERO(NtVerInfo);
2905	PPEB pPeb = NtCurrentPeb();
2906	NtVerInfo.dwMajorVersion = pPeb->OSMajorVersion;
2907	NtVerInfo.dwMinorVersion = pPeb->OSMinorVersion;
2908	NtVerInfo.dwBuildNumber = pPeb->OSBuildNumber;
2909	}
2910
2911	g_uNtVerCombined = SUP_MAKE_NT_VER_COMBINED(NtVerInfo.dwMajorVersion, NtVerInfo.dwMinorVersion, NtVerInfo.dwBuildNumber,
2912	NtVerInfo.wServicePackMajor, NtVerInfo.wServicePackMinor);
2913	}
2914
2915	#endif /* IN_RING3 */
2916

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source: vbox/trunk/src/VBox/HostDrivers/Support/win/SUPHardenedVerifyImage-win.cpp @ 66525

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