UefiVariableStoreImpl.cpp@ 93920

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1	/* $Id: UefiVariableStoreImpl.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* VirtualBox COM NVRAM store class implementation
4	*/
5
6	/*
7	* Copyright (C) 2021-2022 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
18	#define LOG_GROUP LOG_GROUP_MAIN_UEFIVARIABLESTORE
19	#include "LoggingNew.h"
20
21	#include "UefiVariableStoreImpl.h"
22	#include "NvramStoreImpl.h"
23	#include "MachineImpl.h"
24
25	#include "AutoStateDep.h"
26	#include "AutoCaller.h"
27
28	#include "TrustAnchorsAndCerts.h"
29
30	#include <VBox/com/array.h>
31
32	#include <iprt/cpp/utils.h>
33	#include <iprt/efi.h>
34	#include <iprt/file.h>
35	#include <iprt/vfs.h>
36
37	#include <iprt/formats/efi-varstore.h>
38	#include <iprt/formats/efi-signature.h>
39
40	// defines
41	////////////////////////////////////////////////////////////////////////////////
42
43	// globals
44	////////////////////////////////////////////////////////////////////////////////
45
46	/////////////////////////////////////////////////////////////////////////////
47	// UefiVariableStore::Data structure
48	/////////////////////////////////////////////////////////////////////////////
49
50	struct UefiVariableStore::Data
51	{
52	Data()
53	: pParent(NULL),
54	pMachine(NULL),
55	hVfsUefiVarStore(NIL_RTVFS)
56	{ }
57
58	/** The NVRAM store owning this UEFI variable store intstance. */
59	NvramStore * const pParent;
60	/** The machine this UEFI variable store belongs to. */
61	Machine * const pMachine;
62	/** VFS handle to the UEFI variable store. */
63	RTVFS hVfsUefiVarStore;
64	};
65
66	// constructor / destructor
67	////////////////////////////////////////////////////////////////////////////////
68
69	DEFINE_EMPTY_CTOR_DTOR(UefiVariableStore)
70
71	HRESULT UefiVariableStore::FinalConstruct()
72	{
73	return BaseFinalConstruct();
74	}
75
76	void UefiVariableStore::FinalRelease()
77	{
78	uninit();
79	BaseFinalRelease();
80	}
81
82	// public initializer/uninitializer for internal purposes only
83	/////////////////////////////////////////////////////////////////////////////
84
85	/**
86	* Initializes the UEFI variable store object.
87	*
88	* @returns COM result indicator.
89	* @param aParent The NVRAM store owning the UEFI NVRAM content.
90	* @param pMachine
91	*/
92	HRESULT UefiVariableStore::init(NvramStore aParent, Machine pMachine)
93	{
94	LogFlowThisFuncEnter();
95	LogFlowThisFunc(("aParent: %p\n", aParent));
96
97	ComAssertRet(aParent, E_INVALIDARG);
98
99	/* Enclose the state transition NotReady->InInit->Ready */
100	AutoInitSpan autoInitSpan(this);
101	AssertReturn(autoInitSpan.isOk(), E_FAIL);
102
103	m = new Data();
104
105	/* share the parent weakly */
106	unconst(m->pParent) = aParent;
107	unconst(m->pMachine) = pMachine;
108	m->hVfsUefiVarStore = NIL_RTVFS;
109
110	autoInitSpan.setSucceeded();
111
112	LogFlowThisFuncLeave();
113	return S_OK;
114	}
115
116
117	/**
118	* Uninitializes the instance and sets the ready flag to FALSE.
119	* Called either from FinalRelease() or by the parent when it gets destroyed.
120	*/
121	void UefiVariableStore::uninit()
122	{
123	LogFlowThisFuncEnter();
124
125	/* Enclose the state transition Ready->InUninit->NotReady */
126	AutoUninitSpan autoUninitSpan(this);
127	if (autoUninitSpan.uninitDone())
128	return;
129
130	Assert(m->hVfsUefiVarStore == NIL_RTVFS);
131
132	unconst(m->pParent) = NULL;
133	unconst(m->pMachine) = NULL;
134
135	delete m;
136	m = NULL;
137
138	LogFlowThisFuncLeave();
139	}
140
141
142	HRESULT UefiVariableStore::getSecureBootEnabled(BOOL *pfEnabled)
143	{
144	/* the machine needs to be mutable */
145	AutoMutableStateDependency adep(m->pMachine);
146	if (FAILED(adep.rc())) return adep.rc();
147
148	HRESULT hrc = i_retainUefiVariableStore(true /fReadonly/);
149	if (FAILED(hrc)) return hrc;
150
151	AutoReadLock rlock(this COMMA_LOCKVAL_SRC_POS);
152
153	uint64_t cbVar = 0;
154	int vrc = i_uefiVarStoreQueryVarSz("PK", &cbVar);
155	if (RT_SUCCESS(vrc))
156	{
157	*pfEnabled = TRUE;
158
159	/* Check the SecureBootEnable variable for the override. */
160	vrc = i_uefiVarStoreQueryVarSz("SecureBootEnable", &cbVar);
161	if (RT_SUCCESS(vrc))
162	{
163	if (cbVar == sizeof(uint8_t))
164	{
165	uint8_t bVar = 0;
166	hrc = i_uefiVarStoreQueryVar("SecureBootEnable", &bVar, sizeof(bVar));
167	if (SUCCEEDED(hrc))
168	*pfEnabled = bVar == 0x0 ? FALSE : TRUE;
169	}
170	else
171	hrc = setError(E_FAIL, tr("The 'SecureBootEnable' variable size is bogus (expected 1, got %llu)"), cbVar);
172	}
173	else if (vrc != VERR_FILE_NOT_FOUND)
174	hrc = setError(E_FAIL, tr("Failed to query the 'SecureBootEnable' variable size: %Rrc"), vrc);
175	}
176	else if (vrc == VERR_FILE_NOT_FOUND) /* No platform key means no secure boot. */
177	*pfEnabled = FALSE;
178	else
179	hrc = setError(E_FAIL, tr("Failed to query the platform key variable size: %Rrc"), vrc);
180
181	i_releaseUefiVariableStore();
182	return hrc;
183	}
184
185
186	HRESULT UefiVariableStore::setSecureBootEnabled(BOOL fEnabled)
187	{
188	/* the machine needs to be mutable */
189	AutoMutableStateDependency adep(m->pMachine);
190	if (FAILED(adep.rc())) return adep.rc();
191
192	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
193	if (FAILED(hrc)) return hrc;
194
195	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
196
197	EFI_GUID GuidSecureBootEnable = EFI_SECURE_BOOT_ENABLE_DISABLE_GUID;
198	uint64_t cbVar = 0;
199	int vrc = i_uefiVarStoreQueryVarSz("PK", &cbVar);
200	if (RT_SUCCESS(vrc))
201	{
202	uint8_t bVar = fEnabled ? 0x1 : 0x0;
203	hrc = i_uefiVarStoreSetVar(&GuidSecureBootEnable, "SecureBootEnable",
204	EFI_VAR_HEADER_ATTR_NON_VOLATILE
205	\| EFI_VAR_HEADER_ATTR_BOOTSERVICE_ACCESS
206	\| EFI_VAR_HEADER_ATTR_RUNTIME_ACCESS,
207	&bVar, sizeof(bVar));
208	}
209	else if (vrc == VERR_FILE_NOT_FOUND) /* No platform key means no secure boot support. */
210	hrc = setError(VBOX_E_OBJECT_NOT_FOUND, tr("Secure boot is not available because the platform key (PK) is not enrolled"));
211	else
212	hrc = setError(E_FAIL, tr("Failed to query the platform key variable size: %Rrc"), vrc);
213
214	i_releaseUefiVariableStore();
215	return hrc;
216	}
217
218
219	HRESULT UefiVariableStore::addVariable(const com::Utf8Str &aName, const com::Guid &aOwnerUuid,
220	const std::vector<UefiVariableAttributes_T> &aAttributes,
221	const std::vector<BYTE> &aData)
222	{
223	/* the machine needs to be mutable */
224	AutoMutableStateDependency adep(m->pMachine);
225	if (FAILED(adep.rc())) return adep.rc();
226
227	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
228	if (FAILED(hrc)) return hrc;
229
230	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
231
232	uint32_t fAttr = i_uefiVarAttrToMask(aAttributes);
233	EFI_GUID OwnerGuid;
234	RTEfiGuidFromUuid(&OwnerGuid, aOwnerUuid.raw());
235	hrc = i_uefiVarStoreSetVar(&OwnerGuid, aName.c_str(), fAttr, &aData.front(), aData.size());
236
237	i_releaseUefiVariableStore();
238	return hrc;
239	}
240
241
242	HRESULT UefiVariableStore::deleteVariable(const com::Utf8Str &aName, const com::Guid &aOwnerUuid)
243	{
244	RT_NOREF(aOwnerUuid);
245
246	/* the machine needs to be mutable */
247	AutoMutableStateDependency adep(m->pMachine);
248	if (FAILED(adep.rc())) return adep.rc();
249
250	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
251	if (FAILED(hrc)) return hrc;
252
253	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
254
255	char szVarPath[_1K];
256	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/raw/%s", aName.c_str());
257	if (cch > 0)
258	{
259	RTVFSDIR hVfsDirRoot = NIL_RTVFSDIR;
260	int vrc = RTVfsOpenRoot(m->hVfsUefiVarStore, &hVfsDirRoot);
261	if (RT_SUCCESS(vrc))
262	{
263	vrc = RTVfsDirRemoveDir(hVfsDirRoot, szVarPath, 0 /fFlags/);
264	RTVfsDirRelease(hVfsDirRoot);
265	if (RT_FAILURE(vrc))
266	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to remove variable '%s' (%Rrc)"), aName.c_str(), vrc);
267	}
268	else
269	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to open the variable store root (%Rrc)"), vrc);
270	}
271	else
272	hrc = setError(E_FAIL, tr("The variable name is too long"));
273
274	i_releaseUefiVariableStore();
275	return hrc;
276	}
277
278
279	HRESULT UefiVariableStore::changeVariable(const com::Utf8Str &aName, const std::vector<BYTE> &aData)
280	{
281	/* the machine needs to be mutable */
282	AutoMutableStateDependency adep(m->pMachine);
283	if (FAILED(adep.rc())) return adep.rc();
284
285	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
286	if (FAILED(hrc)) return hrc;
287
288	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
289
290	RTVFSFILE hVfsFile = NIL_RTVFSFILE;
291	hrc = i_uefiVarStoreOpenVar(aName.c_str(), &hVfsFile);
292	if (SUCCEEDED(hrc))
293	{
294	int vrc = RTVfsFileSetSize(hVfsFile, aData.size(), RTVFSFILE_SIZE_F_NORMAL);
295	if (RT_SUCCESS(vrc))
296	{
297	vrc = RTVfsFileWriteAt(hVfsFile, 0 /off/, &aData.front(), aData.size(), NULL /pcbWritten/);
298	if (RT_FAILURE(vrc))
299	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to data for variable '%s' (%Rrc)"), aName.c_str(), vrc);
300	}
301	else
302	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to allocate space for the variable '%s' (%Rrc)"), aName.c_str(), vrc);
303
304	RTVfsFileRelease(hVfsFile);
305	}
306
307	i_releaseUefiVariableStore();
308	return hrc;
309	}
310
311
312	HRESULT UefiVariableStore::queryVariableByName(const com::Utf8Str &aName, com::Guid &aOwnerUuid,
313	std::vector<UefiVariableAttributes_T> &aAttributes,
314	std::vector<BYTE> &aData)
315	{
316	/* the machine needs to be mutable */
317	AutoMutableStateDependency adep(m->pMachine);
318	if (FAILED(adep.rc())) return adep.rc();
319
320	HRESULT hrc = i_retainUefiVariableStore(true /fReadonly/);
321	if (FAILED(hrc)) return hrc;
322
323	AutoReadLock rlock(this COMMA_LOCKVAL_SRC_POS);
324
325	uint32_t fAttr;
326	int vrc = i_uefiVarStoreQueryVarAttr(aName.c_str(), &fAttr);
327	if (RT_SUCCESS(vrc))
328	{
329	RTUUID OwnerUuid;
330	vrc = i_uefiVarStoreQueryVarOwnerUuid(aName.c_str(), &OwnerUuid);
331	if (RT_SUCCESS(vrc))
332	{
333	uint64_t cbVar = 0;
334	vrc = i_uefiVarStoreQueryVarSz(aName.c_str(), &cbVar);
335	if (RT_SUCCESS(vrc))
336	{
337	aData.resize(cbVar);
338	hrc = i_uefiVarStoreQueryVar(aName.c_str(), &aData.front(), aData.size());
339	if (SUCCEEDED(hrc))
340	{
341	aOwnerUuid = com::Guid(OwnerUuid);
342	i_uefiAttrMaskToVec(fAttr, aAttributes);
343	}
344	}
345	else
346	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to query the size of variable '%s': %Rrc"), aName.c_str(), vrc);
347	}
348	else
349	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to query the owner UUID of variable '%s': %Rrc"), aName.c_str(), vrc);
350	}
351	else
352	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to query the attributes of variable '%s': %Rrc"), aName.c_str(), vrc);
353
354	i_releaseUefiVariableStore();
355	return hrc;
356	}
357
358
359	HRESULT UefiVariableStore::queryVariables(std::vector<com::Utf8Str> &aNames,
360	std::vector<com::Guid> &aOwnerUuids)
361	{
362	/* the machine needs to be mutable */
363	AutoMutableStateDependency adep(m->pMachine);
364	if (FAILED(adep.rc())) return adep.rc();
365
366	HRESULT hrc = i_retainUefiVariableStore(true /fReadonly/);
367	if (FAILED(hrc)) return hrc;
368
369	AutoReadLock rlock(this COMMA_LOCKVAL_SRC_POS);
370
371	RTVFSDIR hVfsDir = NIL_RTVFSDIR;
372	int vrc = RTVfsDirOpen(m->hVfsUefiVarStore, "by-name", 0 /fFlags/, &hVfsDir);
373	if (RT_SUCCESS(vrc))
374	{
375	RTDIRENTRYEX DirEntry;
376
377	vrc = RTVfsDirReadEx(hVfsDir, &DirEntry, NULL, RTFSOBJATTRADD_NOTHING);
378	for (;;)
379	{
380	RTUUID OwnerUuid;
381	vrc = i_uefiVarStoreQueryVarOwnerUuid(DirEntry.szName, &OwnerUuid);
382	if (RT_FAILURE(vrc))
383	break;
384
385	aNames.push_back(Utf8Str(DirEntry.szName));
386	aOwnerUuids.push_back(com::Guid(OwnerUuid));
387
388	vrc = RTVfsDirReadEx(hVfsDir, &DirEntry, NULL, RTFSOBJATTRADD_NOTHING);
389	if (RT_FAILURE(vrc))
390	break;
391	}
392
393	if (vrc == VERR_NO_MORE_FILES)
394	vrc = VINF_SUCCESS;
395
396	RTVfsDirRelease(hVfsDir);
397	}
398
399	i_releaseUefiVariableStore();
400
401	if (RT_FAILURE(vrc))
402	return setError(VBOX_E_IPRT_ERROR, tr("Failed to query the variables: %Rrc"), vrc);
403
404	return S_OK;
405	}
406
407
408	HRESULT UefiVariableStore::enrollOraclePlatformKey(void)
409	{
410	/* the machine needs to be mutable */
411	AutoMutableStateDependency adep(m->pMachine);
412	if (FAILED(adep.rc())) return adep.rc();
413
414	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
415	if (FAILED(hrc)) return hrc;
416
417	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
418
419	EFI_GUID GuidGlobalVar = EFI_GLOBAL_VARIABLE_GUID;
420
421	/** @todo This conversion from EFI GUID -> IPRT UUID -> Com GUID is nuts... */
422	EFI_GUID GuidOwnerVBox = EFI_SIGNATURE_OWNER_GUID_VBOX;
423	RTUUID UuidVBox;
424	RTEfiGuidToUuid(&UuidVBox, &GuidOwnerVBox);
425
426	const com::Guid GuidVBox(UuidVBox);
427
428	hrc = i_uefiVarStoreAddSignatureToDb(&GuidGlobalVar, "PK", g_abUefiOracleDefPk, g_cbUefiOracleDefPk,
429	GuidVBox, SignatureType_X509);
430
431	i_releaseUefiVariableStore();
432	return hrc;
433	}
434
435
436	HRESULT UefiVariableStore::enrollPlatformKey(const std::vector<BYTE> &aData, const com::Guid &aOwnerUuid)
437	{
438	/* the machine needs to be mutable */
439	AutoMutableStateDependency adep(m->pMachine);
440	if (FAILED(adep.rc())) return adep.rc();
441
442	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
443	if (FAILED(hrc)) return hrc;
444
445	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
446
447	EFI_GUID GuidGlobalVar = EFI_GLOBAL_VARIABLE_GUID;
448	hrc = i_uefiVarStoreAddSignatureToDbVec(&GuidGlobalVar, "PK", aData, aOwnerUuid, SignatureType_X509);
449
450	i_releaseUefiVariableStore();
451	return hrc;
452	}
453
454
455	HRESULT UefiVariableStore::addKek(const std::vector<BYTE> &aData, const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
456	{
457	/* the machine needs to be mutable */
458	AutoMutableStateDependency adep(m->pMachine);
459	if (FAILED(adep.rc())) return adep.rc();
460
461	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
462	if (FAILED(hrc)) return hrc;
463
464	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
465
466	EFI_GUID GuidGlobalVar = EFI_GLOBAL_VARIABLE_GUID;
467	hrc = i_uefiVarStoreAddSignatureToDbVec(&GuidGlobalVar, "KEK", aData, aOwnerUuid, enmSignatureType);
468
469	i_releaseUefiVariableStore();
470	return hrc;
471	}
472
473
474	HRESULT UefiVariableStore::addSignatureToDb(const std::vector<BYTE> &aData, const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
475	{
476	/* the machine needs to be mutable */
477	AutoMutableStateDependency adep(m->pMachine);
478	if (FAILED(adep.rc())) return adep.rc();
479
480	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
481	if (FAILED(hrc)) return hrc;
482
483	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
484
485	EFI_GUID GuidSecurityDb = EFI_GLOBAL_VARIABLE_GUID;
486	hrc = i_uefiVarStoreAddSignatureToDbVec(&GuidSecurityDb, "db", aData, aOwnerUuid, enmSignatureType);
487
488	i_releaseUefiVariableStore();
489	return hrc;
490	}
491
492
493	HRESULT UefiVariableStore::addSignatureToDbx(const std::vector<BYTE> &aData, const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
494	{
495	/* the machine needs to be mutable */
496	AutoMutableStateDependency adep(m->pMachine);
497	if (FAILED(adep.rc())) return adep.rc();
498
499	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
500	if (FAILED(hrc)) return hrc;
501
502	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
503
504	EFI_GUID GuidSecurityDb = EFI_IMAGE_SECURITY_DATABASE_GUID;
505	hrc = i_uefiVarStoreAddSignatureToDbVec(&GuidSecurityDb, "dbx", aData, aOwnerUuid, enmSignatureType);
506
507	i_releaseUefiVariableStore();
508	return hrc;
509	}
510
511
512	HRESULT UefiVariableStore::enrollDefaultMsSignatures(void)
513	{
514	AutoMutableStateDependency adep(m->pMachine);
515	if (FAILED(adep.rc())) return adep.rc();
516
517	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
518	if (FAILED(hrc)) return hrc;
519
520	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
521
522	EFI_GUID EfiGuidSecurityDb = EFI_IMAGE_SECURITY_DATABASE_GUID;
523	EFI_GUID EfiGuidGlobalVar = EFI_GLOBAL_VARIABLE_GUID;
524
525	/** @todo This conversion from EFI GUID -> IPRT UUID -> Com GUID is nuts... */
526	EFI_GUID EfiGuidMs = EFI_SIGNATURE_OWNER_GUID_MICROSOFT;
527	RTUUID UuidMs;
528	RTEfiGuidToUuid(&UuidMs, &EfiGuidMs);
529
530	const com::Guid GuidMs(UuidMs);
531
532	hrc = i_uefiVarStoreAddSignatureToDb(&EfiGuidGlobalVar, "KEK", g_abUefiMicrosoftKek, g_cbUefiMicrosoftKek,
533	GuidMs, SignatureType_X509);
534	if (SUCCEEDED(hrc))
535	{
536	hrc = i_uefiVarStoreAddSignatureToDb(&EfiGuidSecurityDb, "db", g_abUefiMicrosoftCa, g_cbUefiMicrosoftCa,
537	GuidMs, SignatureType_X509);
538	if (SUCCEEDED(hrc))
539	hrc = i_uefiVarStoreAddSignatureToDb(&EfiGuidSecurityDb, "db", g_abUefiMicrosoftProPca, g_cbUefiMicrosoftProPca,
540	GuidMs, SignatureType_X509);
541	}
542
543	i_releaseUefiVariableStore();
544	return hrc;
545	}
546
547
548	/**
549	* Sets the given attributes for the given EFI variable store variable.
550	*
551	* @returns IPRT status code.
552	* @param pszVar The variable to set the attributes for.
553	* @param fAttr The attributes to set, see EFI_VAR_HEADER_ATTR_XXX.
554	*/
555	int UefiVariableStore::i_uefiVarStoreSetVarAttr(const char *pszVar, uint32_t fAttr)
556	{
557	char szVarPath[_1K];
558	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/raw/%s/attr", pszVar);
559	Assert(cch > 0); RT_NOREF(cch);
560
561	RTVFSFILE hVfsFileAttr = NIL_RTVFSFILE;
562	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
563	RTFILE_O_READWRITE \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
564	&hVfsFileAttr);
565	if (RT_SUCCESS(vrc))
566	{
567	uint32_t fAttrLe = RT_H2LE_U32(fAttr);
568	vrc = RTVfsFileWrite(hVfsFileAttr, &fAttrLe, sizeof(fAttrLe), NULL /pcbWritten/);
569	RTVfsFileRelease(hVfsFileAttr);
570	}
571
572	return vrc;
573	}
574
575
576	/**
577	* Queries the attributes for the given EFI variable store variable.
578	*
579	* @returns IPRT status code.
580	* @param pszVar The variable to query the attributes for.
581	* @param pfAttr Where to store the attributes on success.
582	*/
583	int UefiVariableStore::i_uefiVarStoreQueryVarAttr(const char pszVar, uint32_t pfAttr)
584	{
585	char szVarPath[_1K];
586	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/raw/%s/attr", pszVar);
587	Assert(cch > 0); RT_NOREF(cch);
588
589	RTVFSFILE hVfsFileAttr = NIL_RTVFSFILE;
590	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
591	RTFILE_O_READ \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
592	&hVfsFileAttr);
593	if (RT_SUCCESS(vrc))
594	{
595	uint32_t fAttrLe = 0;
596	vrc = RTVfsFileRead(hVfsFileAttr, &fAttrLe, sizeof(fAttrLe), NULL /pcbRead/);
597	RTVfsFileRelease(hVfsFileAttr);
598	if (RT_SUCCESS(vrc))
599	*pfAttr = RT_LE2H_U32(fAttrLe);
600	}
601
602	return vrc;
603	}
604
605
606	/**
607	* Queries the data size for the given variable.
608	*
609	* @returns IPRT status code.
610	* @param pszVar The variable to query the size for.
611	* @param pcbVar Where to store the size of the variable data on success.
612	*/
613	int UefiVariableStore::i_uefiVarStoreQueryVarSz(const char pszVar, uint64_t pcbVar)
614	{
615	char szVarPath[_1K];
616	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/by-name/%s", pszVar);
617	Assert(cch > 0); RT_NOREF(cch);
618
619	RTVFSFILE hVfsFile = NIL_RTVFSFILE;
620	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
621	RTFILE_O_READ \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
622	&hVfsFile);
623	if (RT_SUCCESS(vrc))
624	{
625	vrc = RTVfsFileQuerySize(hVfsFile, pcbVar);
626	RTVfsFileRelease(hVfsFile);
627	}
628	else if (vrc == VERR_PATH_NOT_FOUND)
629	vrc = VERR_FILE_NOT_FOUND;
630
631	return vrc;
632	}
633
634
635	/**
636	* Returns the owner UUID of the given variable.
637	*
638	* @returns IPRT status code.
639	* @param pszVar The variable to query the owner UUID for.
640	* @param pUuid Where to store the owner UUID on success.
641	*/
642	int UefiVariableStore::i_uefiVarStoreQueryVarOwnerUuid(const char *pszVar, PRTUUID pUuid)
643	{
644	char szVarPath[_1K];
645	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/raw/%s/uuid", pszVar);
646	Assert(cch > 0); RT_NOREF(cch);
647
648	RTVFSFILE hVfsFileAttr = NIL_RTVFSFILE;
649	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
650	RTFILE_O_READ \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
651	&hVfsFileAttr);
652	if (RT_SUCCESS(vrc))
653	{
654	EFI_GUID OwnerGuid;
655	vrc = RTVfsFileRead(hVfsFileAttr, &OwnerGuid, sizeof(OwnerGuid), NULL /pcbRead/);
656	RTVfsFileRelease(hVfsFileAttr);
657	if (RT_SUCCESS(vrc))
658	RTEfiGuidToUuid(pUuid, &OwnerGuid);
659	}
660
661	return vrc;
662	}
663
664
665	/**
666	* Converts the given vector of variables attributes to a bitmask used internally.
667	*
668	* @returns Mask of UEFI variable attributes.
669	* @param vecAttributes Vector of variable atttributes.
670	*/
671	uint32_t UefiVariableStore::i_uefiVarAttrToMask(const std::vector<UefiVariableAttributes_T> &vecAttributes)
672	{
673	uint32_t fAttr = 0;
674
675	for (size_t i = 0; i < vecAttributes.size(); i++)
676	fAttr \|= (ULONG)vecAttributes[i];
677
678	return fAttr;
679	}
680
681
682	/**
683	* Converts the given aatribute mask to the attribute vector used externally.
684	*
685	* @returns nothing.
686	* @param fAttr The attribute mask.
687	* @param aAttributes The vector to store the attibutes in.
688	*/
689	void UefiVariableStore::i_uefiAttrMaskToVec(uint32_t fAttr, std::vector<UefiVariableAttributes_T> &aAttributes)
690	{
691	if (fAttr & EFI_VAR_HEADER_ATTR_NON_VOLATILE)
692	aAttributes.push_back(UefiVariableAttributes_NonVolatile);
693	if (fAttr & EFI_VAR_HEADER_ATTR_BOOTSERVICE_ACCESS)
694	aAttributes.push_back(UefiVariableAttributes_BootServiceAccess);
695	if (fAttr & EFI_VAR_HEADER_ATTR_RUNTIME_ACCESS)
696	aAttributes.push_back(UefiVariableAttributes_RuntimeAccess);
697	if (fAttr & EFI_VAR_HEADER_ATTR_HW_ERROR_RECORD)
698	aAttributes.push_back(UefiVariableAttributes_HwErrorRecord);
699	if (fAttr & EFI_AUTH_VAR_HEADER_ATTR_AUTH_WRITE_ACCESS)
700	aAttributes.push_back(UefiVariableAttributes_AuthWriteAccess);
701	if (fAttr & EFI_AUTH_VAR_HEADER_ATTR_TIME_BASED_AUTH_WRITE_ACCESS)
702	aAttributes.push_back(UefiVariableAttributes_AuthTimeBasedWriteAccess);
703	if (fAttr & EFI_AUTH_VAR_HEADER_ATTR_APPEND_WRITE)
704	aAttributes.push_back(UefiVariableAttributes_AuthAppendWrite);
705	}
706
707
708	/**
709	* Retains the reference of the variable store from the parent.
710	*
711	* @returns COM status code.
712	* @param fReadonly Flag whether the access is readonly.
713	*/
714	HRESULT UefiVariableStore::i_retainUefiVariableStore(bool fReadonly)
715	{
716	Assert(m->hVfsUefiVarStore = NIL_RTVFS);
717	return m->pParent->i_retainUefiVarStore(&m->hVfsUefiVarStore, fReadonly);
718	}
719
720
721	/**
722	* Releases the reference of the variable store from the parent.
723	*
724	* @returns COM status code.
725	*/
726	HRESULT UefiVariableStore::i_releaseUefiVariableStore(void)
727	{
728	RTVFS hVfs = m->hVfsUefiVarStore;
729
730	m->hVfsUefiVarStore = NIL_RTVFS;
731	return m->pParent->i_releaseUefiVarStore(hVfs);
732	}
733
734
735	/**
736	* Adds the given variable to the variable store.
737	*
738	* @returns IPRT status code.
739	* @param pGuid The EFI GUID of the variable.
740	* @param pszVar The variable name.
741	* @param fAttr Attributes for the variable.
742	* @param phVfsFile Where to return the VFS file handle to the created variable on success.
743	*/
744	HRESULT UefiVariableStore::i_uefiVarStoreAddVar(PCEFI_GUID pGuid, const char *pszVar, uint32_t fAttr, PRTVFSFILE phVfsFile)
745	{
746	RTUUID UuidVar;
747	RTEfiGuidToUuid(&UuidVar, pGuid);
748
749	char szVarPath[_1K];
750	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/by-uuid/%RTuuid/%s", &UuidVar, pszVar);
751	Assert(cch > 0); RT_NOREF(cch);
752
753	HRESULT hrc = S_OK;
754	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
755	RTFILE_O_READWRITE \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
756	phVfsFile);
757	if ( vrc == VERR_PATH_NOT_FOUND
758	\|\| vrc == VERR_FILE_NOT_FOUND)
759	{
760	/*
761	* Try to create the owner GUID of the variable by creating the appropriate directory,
762	* ignore error if it exists already.
763	*/
764	RTVFSDIR hVfsDirRoot = NIL_RTVFSDIR;
765	vrc = RTVfsOpenRoot(m->hVfsUefiVarStore, &hVfsDirRoot);
766	if (RT_SUCCESS(vrc))
767	{
768	char szGuidPath[_1K];
769	cch = RTStrPrintf2(szGuidPath, sizeof(szGuidPath), "by-uuid/%RTuuid", &UuidVar);
770	Assert(cch > 0);
771
772	RTVFSDIR hVfsDirGuid = NIL_RTVFSDIR;
773	vrc = RTVfsDirCreateDir(hVfsDirRoot, szGuidPath, 0755, 0 /fFlags/, &hVfsDirGuid);
774	if (RT_SUCCESS(vrc))
775	RTVfsDirRelease(hVfsDirGuid);
776	else if (vrc == VERR_ALREADY_EXISTS)
777	vrc = VINF_SUCCESS;
778
779	RTVfsDirRelease(hVfsDirRoot);
780	}
781	else
782	hrc = setError(E_FAIL, tr("Opening variable storage root directory failed: %Rrc"), vrc);
783
784	if (RT_SUCCESS(vrc))
785	{
786	vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
787	RTFILE_O_READWRITE \| RTFILE_O_DENY_NONE \| RTFILE_O_CREATE,
788	phVfsFile);
789	if (RT_SUCCESS(vrc))
790	vrc = i_uefiVarStoreSetVarAttr(pszVar, fAttr);
791	}
792
793	if (RT_FAILURE(vrc))
794	hrc = setError(E_FAIL, tr("Creating the variable '%s' failed: %Rrc"), pszVar, vrc);
795	}
796
797	return hrc;
798	}
799
800
801	/**
802	* Tries to open the given variable from the variable store and returns a file handle.
803	*
804	* @returns IPRT status code.
805	* @param pszVar The variable name.
806	* @param phVfsFile Where to return the VFS file handle to the created variable on success.
807	*/
808	HRESULT UefiVariableStore::i_uefiVarStoreOpenVar(const char *pszVar, PRTVFSFILE phVfsFile)
809	{
810	char szVarPath[_1K];
811	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/by-name/%s", pszVar);
812	Assert(cch > 0); RT_NOREF(cch);
813
814	HRESULT hrc = S_OK;
815	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
816	RTFILE_O_READWRITE \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
817	phVfsFile);
818	if ( vrc == VERR_PATH_NOT_FOUND
819	\|\| vrc == VERR_FILE_NOT_FOUND)
820	hrc = setError(VBOX_E_OBJECT_NOT_FOUND, tr("The variable '%s' could not be found"), pszVar);
821	else if (RT_FAILURE(vrc))
822	hrc = setError(VBOX_E_IPRT_ERROR, tr("Couldn't open variable '%s' (%Rrc)"), pszVar, vrc);
823
824	return hrc;
825	}
826
827
828	HRESULT UefiVariableStore::i_uefiVarStoreSetVar(PCEFI_GUID pGuid, const char pszVar, uint32_t fAttr, const void pvData, size_t cbData)
829	{
830	RTVFSFILE hVfsFileVar = NIL_RTVFSFILE;
831
832	HRESULT hrc = i_uefiVarStoreAddVar(pGuid, pszVar, fAttr, &hVfsFileVar);
833	if (SUCCEEDED(hrc))
834	{
835	int vrc = RTVfsFileWrite(hVfsFileVar, pvData, cbData, NULL /pcbWritten/);
836	if (RT_FAILURE(vrc))
837	hrc = setError(E_FAIL, tr("Setting the variable '%s' failed: %Rrc"), pszVar, vrc);
838
839	RTVfsFileRelease(hVfsFileVar);
840	}
841
842	return hrc;
843	}
844
845
846	HRESULT UefiVariableStore::i_uefiVarStoreQueryVar(const char pszVar, void pvData, size_t cbData)
847	{
848	HRESULT hrc = S_OK;
849
850	char szVarPath[_1K];
851	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/by-name/%s", pszVar);
852	Assert(cch > 0); RT_NOREF(cch);
853
854	RTVFSFILE hVfsFile = NIL_RTVFSFILE;
855	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
856	RTFILE_O_READ \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
857	&hVfsFile);
858	if (RT_SUCCESS(vrc))
859	{
860	vrc = RTVfsFileRead(hVfsFile, pvData, cbData, NULL /pcbRead/);
861	if (RT_FAILURE(vrc))
862	hrc = setError(E_FAIL, tr("Failed to read data of variable '%s': %Rrc"), pszVar, vrc);
863
864	RTVfsFileRelease(hVfsFile);
865	}
866	else
867	hrc = setError(E_FAIL, tr("Failed to open variable '%s' for reading: %Rrc"), pszVar, vrc);
868
869	return hrc;
870	}
871
872	HRESULT UefiVariableStore::i_uefiSigDbAddSig(RTEFISIGDB hEfiSigDb, const void *pvData, size_t cbData,
873	const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
874	{
875	RTEFISIGTYPE enmSigType = RTEFISIGTYPE_INVALID;
876
877	switch (enmSignatureType)
878	{
879	case SignatureType_X509:
880	enmSigType = RTEFISIGTYPE_X509;
881	break;
882	case SignatureType_Sha256:
883	enmSigType = RTEFISIGTYPE_SHA256;
884	break;
885	default:
886	return setError(E_FAIL, tr("The given signature type is not supported"));
887	}
888
889	int vrc = RTEfiSigDbAddSignatureFromBuf(hEfiSigDb, enmSigType, aOwnerUuid.raw(), pvData, cbData);
890	if (RT_SUCCESS(vrc))
891	return S_OK;
892
893	return setError(E_FAIL, tr("Failed to add signature to the database (%Rrc)"), vrc);
894	}
895
896
897	HRESULT UefiVariableStore::i_uefiVarStoreAddSignatureToDb(PCEFI_GUID pGuid, const char pszDb, const void pvData, size_t cbData,
898	const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
899	{
900	RTVFSFILE hVfsFileSigDb = NIL_RTVFSFILE;
901
902	HRESULT hrc = i_uefiVarStoreAddVar(pGuid, pszDb,
903	EFI_VAR_HEADER_ATTR_NON_VOLATILE
904	\| EFI_VAR_HEADER_ATTR_BOOTSERVICE_ACCESS
905	\| EFI_VAR_HEADER_ATTR_RUNTIME_ACCESS
906	\| EFI_AUTH_VAR_HEADER_ATTR_TIME_BASED_AUTH_WRITE_ACCESS,
907	&hVfsFileSigDb);
908	if (SUCCEEDED(hrc))
909	{
910	RTEFISIGDB hEfiSigDb;
911
912	int vrc = RTEfiSigDbCreate(&hEfiSigDb);
913	if (RT_SUCCESS(vrc))
914	{
915	vrc = RTEfiSigDbAddFromExistingDb(hEfiSigDb, hVfsFileSigDb);
916	if (RT_SUCCESS(vrc))
917	{
918	hrc = i_uefiSigDbAddSig(hEfiSigDb, pvData, cbData, aOwnerUuid, enmSignatureType);
919	if (SUCCEEDED(hrc))
920	{
921	vrc = RTVfsFileSeek(hVfsFileSigDb, 0 /offSeek/, RTFILE_SEEK_BEGIN, NULL /poffActual/);
922	AssertRC(vrc);
923
924	vrc = RTEfiSigDbWriteToFile(hEfiSigDb, hVfsFileSigDb);
925	if (RT_FAILURE(vrc))
926	hrc = setError(E_FAIL, tr("Writing updated signature database failed: %Rrc"), vrc);
927	}
928	}
929	else
930	hrc = setError(E_FAIL, tr("Loading signature database failed: %Rrc"), vrc);
931
932	RTEfiSigDbDestroy(hEfiSigDb);
933	}
934	else
935	hrc = setError(E_FAIL, tr("Creating signature database failed: %Rrc"), vrc);
936
937	RTVfsFileRelease(hVfsFileSigDb);
938	}
939
940	return hrc;
941	}
942
943
944	HRESULT UefiVariableStore::i_uefiVarStoreAddSignatureToDbVec(PCEFI_GUID pGuid, const char *pszDb, const std::vector<BYTE> &aData,
945	const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
946	{
947	return i_uefiVarStoreAddSignatureToDb(pGuid, pszDb, &aData.front(), aData.size(), aOwnerUuid, enmSignatureType);
948	}
949
950	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-server/UefiVariableStoreImpl.cpp@ 93920

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