UefiVariableStoreImpl.cpp@ 98103

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1	/* $Id: UefiVariableStoreImpl.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* VirtualBox COM NVRAM store class implementation
4	*/
5
6	/*
7	* Copyright (C) 2021-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28	#define LOG_GROUP LOG_GROUP_MAIN_UEFIVARIABLESTORE
29	#include "LoggingNew.h"
30
31	#include "UefiVariableStoreImpl.h"
32	#include "NvramStoreImpl.h"
33	#include "MachineImpl.h"
34
35	#include "AutoStateDep.h"
36	#include "AutoCaller.h"
37
38	#include "TrustAnchorsAndCerts.h"
39
40	#include <VBox/com/array.h>
41
42	#include <iprt/cpp/utils.h>
43	#include <iprt/efi.h>
44	#include <iprt/file.h>
45	#include <iprt/vfs.h>
46
47	#include <iprt/formats/efi-varstore.h>
48	#include <iprt/formats/efi-signature.h>
49
50	// defines
51	////////////////////////////////////////////////////////////////////////////////
52
53	// globals
54	////////////////////////////////////////////////////////////////////////////////
55
56	/////////////////////////////////////////////////////////////////////////////
57	// UefiVariableStore::Data structure
58	/////////////////////////////////////////////////////////////////////////////
59
60	struct UefiVariableStore::Data
61	{
62	Data()
63	: pParent(NULL),
64	pMachine(NULL),
65	hVfsUefiVarStore(NIL_RTVFS)
66	{ }
67
68	/** The NVRAM store owning this UEFI variable store intstance. */
69	NvramStore * const pParent;
70	/** The machine this UEFI variable store belongs to. */
71	Machine * const pMachine;
72	/** VFS handle to the UEFI variable store. */
73	RTVFS hVfsUefiVarStore;
74	};
75
76	// constructor / destructor
77	////////////////////////////////////////////////////////////////////////////////
78
79	DEFINE_EMPTY_CTOR_DTOR(UefiVariableStore)
80
81	HRESULT UefiVariableStore::FinalConstruct()
82	{
83	return BaseFinalConstruct();
84	}
85
86	void UefiVariableStore::FinalRelease()
87	{
88	uninit();
89	BaseFinalRelease();
90	}
91
92	// public initializer/uninitializer for internal purposes only
93	/////////////////////////////////////////////////////////////////////////////
94
95	/**
96	* Initializes the UEFI variable store object.
97	*
98	* @returns COM result indicator.
99	* @param aParent The NVRAM store owning the UEFI NVRAM content.
100	* @param pMachine
101	*/
102	HRESULT UefiVariableStore::init(NvramStore aParent, Machine pMachine)
103	{
104	LogFlowThisFuncEnter();
105	LogFlowThisFunc(("aParent: %p\n", aParent));
106
107	ComAssertRet(aParent, E_INVALIDARG);
108
109	/* Enclose the state transition NotReady->InInit->Ready */
110	AutoInitSpan autoInitSpan(this);
111	AssertReturn(autoInitSpan.isOk(), E_FAIL);
112
113	m = new Data();
114
115	/* share the parent weakly */
116	unconst(m->pParent) = aParent;
117	unconst(m->pMachine) = pMachine;
118	m->hVfsUefiVarStore = NIL_RTVFS;
119
120	autoInitSpan.setSucceeded();
121
122	LogFlowThisFuncLeave();
123	return S_OK;
124	}
125
126
127	/**
128	* Uninitializes the instance and sets the ready flag to FALSE.
129	* Called either from FinalRelease() or by the parent when it gets destroyed.
130	*/
131	void UefiVariableStore::uninit()
132	{
133	LogFlowThisFuncEnter();
134
135	/* Enclose the state transition Ready->InUninit->NotReady */
136	AutoUninitSpan autoUninitSpan(this);
137	if (autoUninitSpan.uninitDone())
138	return;
139
140	Assert(m->hVfsUefiVarStore == NIL_RTVFS);
141
142	unconst(m->pParent) = NULL;
143	unconst(m->pMachine) = NULL;
144
145	delete m;
146	m = NULL;
147
148	LogFlowThisFuncLeave();
149	}
150
151
152	HRESULT UefiVariableStore::getSecureBootEnabled(BOOL *pfEnabled)
153	{
154	/* the machine needs to be mutable */
155	AutoMutableStateDependency adep(m->pMachine);
156	if (FAILED(adep.rc())) return adep.rc();
157
158	HRESULT hrc = i_retainUefiVariableStore(true /fReadonly/);
159	if (FAILED(hrc)) return hrc;
160
161	AutoReadLock rlock(this COMMA_LOCKVAL_SRC_POS);
162
163	uint64_t cbVar = 0;
164	int vrc = i_uefiVarStoreQueryVarSz("PK", &cbVar);
165	if (RT_SUCCESS(vrc))
166	{
167	*pfEnabled = TRUE;
168
169	/* Check the SecureBootEnable variable for the override. */
170	vrc = i_uefiVarStoreQueryVarSz("SecureBootEnable", &cbVar);
171	if (RT_SUCCESS(vrc))
172	{
173	if (cbVar == sizeof(uint8_t))
174	{
175	uint8_t bVar = 0;
176	hrc = i_uefiVarStoreQueryVar("SecureBootEnable", &bVar, sizeof(bVar));
177	if (SUCCEEDED(hrc))
178	*pfEnabled = bVar == 0x0 ? FALSE : TRUE;
179	}
180	else
181	hrc = setError(E_FAIL, tr("The 'SecureBootEnable' variable size is bogus (expected 1, got %llu)"), cbVar);
182	}
183	else if (vrc != VERR_FILE_NOT_FOUND)
184	hrc = setError(E_FAIL, tr("Failed to query the 'SecureBootEnable' variable size: %Rrc"), vrc);
185	}
186	else if (vrc == VERR_FILE_NOT_FOUND) /* No platform key means no secure boot. */
187	*pfEnabled = FALSE;
188	else
189	hrc = setError(E_FAIL, tr("Failed to query the platform key variable size: %Rrc"), vrc);
190
191	i_releaseUefiVariableStore();
192	return hrc;
193	}
194
195
196	HRESULT UefiVariableStore::setSecureBootEnabled(BOOL fEnabled)
197	{
198	/* the machine needs to be mutable */
199	AutoMutableStateDependency adep(m->pMachine);
200	if (FAILED(adep.rc())) return adep.rc();
201
202	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
203	if (FAILED(hrc)) return hrc;
204
205	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
206
207	EFI_GUID GuidSecureBootEnable = EFI_SECURE_BOOT_ENABLE_DISABLE_GUID;
208	uint64_t cbVar = 0;
209	int vrc = i_uefiVarStoreQueryVarSz("PK", &cbVar);
210	if (RT_SUCCESS(vrc))
211	{
212	uint8_t bVar = fEnabled ? 0x1 : 0x0;
213	hrc = i_uefiVarStoreSetVar(&GuidSecureBootEnable, "SecureBootEnable",
214	EFI_VAR_HEADER_ATTR_NON_VOLATILE
215	\| EFI_VAR_HEADER_ATTR_BOOTSERVICE_ACCESS
216	\| EFI_VAR_HEADER_ATTR_RUNTIME_ACCESS,
217	&bVar, sizeof(bVar));
218	}
219	else if (vrc == VERR_FILE_NOT_FOUND) /* No platform key means no secure boot support. */
220	hrc = setError(VBOX_E_OBJECT_NOT_FOUND, tr("Secure boot is not available because the platform key (PK) is not enrolled"));
221	else
222	hrc = setError(E_FAIL, tr("Failed to query the platform key variable size: %Rrc"), vrc);
223
224	i_releaseUefiVariableStore();
225	return hrc;
226	}
227
228
229	HRESULT UefiVariableStore::addVariable(const com::Utf8Str &aName, const com::Guid &aOwnerUuid,
230	const std::vector<UefiVariableAttributes_T> &aAttributes,
231	const std::vector<BYTE> &aData)
232	{
233	/* the machine needs to be mutable */
234	AutoMutableStateDependency adep(m->pMachine);
235	if (FAILED(adep.rc())) return adep.rc();
236
237	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
238	if (FAILED(hrc)) return hrc;
239
240	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
241
242	uint32_t fAttr = i_uefiVarAttrToMask(aAttributes);
243	EFI_GUID OwnerGuid;
244	RTEfiGuidFromUuid(&OwnerGuid, aOwnerUuid.raw());
245	hrc = i_uefiVarStoreSetVar(&OwnerGuid, aName.c_str(), fAttr, &aData.front(), aData.size());
246
247	i_releaseUefiVariableStore();
248	return hrc;
249	}
250
251
252	HRESULT UefiVariableStore::deleteVariable(const com::Utf8Str &aName, const com::Guid &aOwnerUuid)
253	{
254	RT_NOREF(aOwnerUuid);
255
256	/* the machine needs to be mutable */
257	AutoMutableStateDependency adep(m->pMachine);
258	if (FAILED(adep.rc())) return adep.rc();
259
260	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
261	if (FAILED(hrc)) return hrc;
262
263	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
264
265	char szVarPath[_1K];
266	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/raw/%s", aName.c_str());
267	if (cch > 0)
268	{
269	RTVFSDIR hVfsDirRoot = NIL_RTVFSDIR;
270	int vrc = RTVfsOpenRoot(m->hVfsUefiVarStore, &hVfsDirRoot);
271	if (RT_SUCCESS(vrc))
272	{
273	vrc = RTVfsDirRemoveDir(hVfsDirRoot, szVarPath, 0 /fFlags/);
274	RTVfsDirRelease(hVfsDirRoot);
275	if (RT_FAILURE(vrc))
276	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to remove variable '%s' (%Rrc)"), aName.c_str(), vrc);
277	}
278	else
279	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to open the variable store root (%Rrc)"), vrc);
280	}
281	else
282	hrc = setError(E_FAIL, tr("The variable name is too long"));
283
284	i_releaseUefiVariableStore();
285	return hrc;
286	}
287
288
289	HRESULT UefiVariableStore::changeVariable(const com::Utf8Str &aName, const std::vector<BYTE> &aData)
290	{
291	/* the machine needs to be mutable */
292	AutoMutableStateDependency adep(m->pMachine);
293	if (FAILED(adep.rc())) return adep.rc();
294
295	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
296	if (FAILED(hrc)) return hrc;
297
298	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
299
300	RTVFSFILE hVfsFile = NIL_RTVFSFILE;
301	hrc = i_uefiVarStoreOpenVar(aName.c_str(), &hVfsFile);
302	if (SUCCEEDED(hrc))
303	{
304	int vrc = RTVfsFileSetSize(hVfsFile, aData.size(), RTVFSFILE_SIZE_F_NORMAL);
305	if (RT_SUCCESS(vrc))
306	{
307	vrc = RTVfsFileWriteAt(hVfsFile, 0 /off/, &aData.front(), aData.size(), NULL /pcbWritten/);
308	if (RT_FAILURE(vrc))
309	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to data for variable '%s' (%Rrc)"), aName.c_str(), vrc);
310	}
311	else
312	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to allocate space for the variable '%s' (%Rrc)"), aName.c_str(), vrc);
313
314	RTVfsFileRelease(hVfsFile);
315	}
316
317	i_releaseUefiVariableStore();
318	return hrc;
319	}
320
321
322	HRESULT UefiVariableStore::queryVariableByName(const com::Utf8Str &aName, com::Guid &aOwnerUuid,
323	std::vector<UefiVariableAttributes_T> &aAttributes,
324	std::vector<BYTE> &aData)
325	{
326	/* the machine needs to be mutable */
327	AutoMutableStateDependency adep(m->pMachine);
328	if (FAILED(adep.rc())) return adep.rc();
329
330	HRESULT hrc = i_retainUefiVariableStore(true /fReadonly/);
331	if (FAILED(hrc)) return hrc;
332
333	AutoReadLock rlock(this COMMA_LOCKVAL_SRC_POS);
334
335	uint32_t fAttr;
336	int vrc = i_uefiVarStoreQueryVarAttr(aName.c_str(), &fAttr);
337	if (RT_SUCCESS(vrc))
338	{
339	RTUUID OwnerUuid;
340	vrc = i_uefiVarStoreQueryVarOwnerUuid(aName.c_str(), &OwnerUuid);
341	if (RT_SUCCESS(vrc))
342	{
343	uint64_t cbVar = 0;
344	vrc = i_uefiVarStoreQueryVarSz(aName.c_str(), &cbVar);
345	if (RT_SUCCESS(vrc))
346	{
347	aData.resize(cbVar);
348	hrc = i_uefiVarStoreQueryVar(aName.c_str(), &aData.front(), aData.size());
349	if (SUCCEEDED(hrc))
350	{
351	aOwnerUuid = com::Guid(OwnerUuid);
352	i_uefiAttrMaskToVec(fAttr, aAttributes);
353	}
354	}
355	else
356	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to query the size of variable '%s': %Rrc"), aName.c_str(), vrc);
357	}
358	else
359	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to query the owner UUID of variable '%s': %Rrc"), aName.c_str(), vrc);
360	}
361	else
362	hrc = setError(VBOX_E_IPRT_ERROR, tr("Failed to query the attributes of variable '%s': %Rrc"), aName.c_str(), vrc);
363
364	i_releaseUefiVariableStore();
365	return hrc;
366	}
367
368
369	HRESULT UefiVariableStore::queryVariables(std::vector<com::Utf8Str> &aNames,
370	std::vector<com::Guid> &aOwnerUuids)
371	{
372	/* the machine needs to be mutable */
373	AutoMutableStateDependency adep(m->pMachine);
374	if (FAILED(adep.rc())) return adep.rc();
375
376	HRESULT hrc = i_retainUefiVariableStore(true /fReadonly/);
377	if (FAILED(hrc)) return hrc;
378
379	AutoReadLock rlock(this COMMA_LOCKVAL_SRC_POS);
380
381	RTVFSDIR hVfsDir = NIL_RTVFSDIR;
382	int vrc = RTVfsDirOpen(m->hVfsUefiVarStore, "by-name", 0 /fFlags/, &hVfsDir);
383	if (RT_SUCCESS(vrc))
384	{
385	RTDIRENTRYEX DirEntry;
386
387	vrc = RTVfsDirReadEx(hVfsDir, &DirEntry, NULL, RTFSOBJATTRADD_NOTHING);
388	for (;;)
389	{
390	RTUUID OwnerUuid;
391	vrc = i_uefiVarStoreQueryVarOwnerUuid(DirEntry.szName, &OwnerUuid);
392	if (RT_FAILURE(vrc))
393	break;
394
395	aNames.push_back(Utf8Str(DirEntry.szName));
396	aOwnerUuids.push_back(com::Guid(OwnerUuid));
397
398	vrc = RTVfsDirReadEx(hVfsDir, &DirEntry, NULL, RTFSOBJATTRADD_NOTHING);
399	if (RT_FAILURE(vrc))
400	break;
401	}
402
403	if (vrc == VERR_NO_MORE_FILES)
404	vrc = VINF_SUCCESS;
405
406	RTVfsDirRelease(hVfsDir);
407	}
408
409	i_releaseUefiVariableStore();
410
411	if (RT_FAILURE(vrc))
412	return setError(VBOX_E_IPRT_ERROR, tr("Failed to query the variables: %Rrc"), vrc);
413
414	return S_OK;
415	}
416
417
418	HRESULT UefiVariableStore::enrollOraclePlatformKey(void)
419	{
420	/* the machine needs to be mutable */
421	AutoMutableStateDependency adep(m->pMachine);
422	if (FAILED(adep.rc())) return adep.rc();
423
424	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
425	if (FAILED(hrc)) return hrc;
426
427	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
428
429	EFI_GUID GuidGlobalVar = EFI_GLOBAL_VARIABLE_GUID;
430
431	/** @todo This conversion from EFI GUID -> IPRT UUID -> Com GUID is nuts... */
432	EFI_GUID GuidOwnerVBox = EFI_SIGNATURE_OWNER_GUID_VBOX;
433	RTUUID UuidVBox;
434	RTEfiGuidToUuid(&UuidVBox, &GuidOwnerVBox);
435
436	const com::Guid GuidVBox(UuidVBox);
437
438	hrc = i_uefiVarStoreAddSignatureToDb(&GuidGlobalVar, "PK", g_abUefiOracleDefPk, g_cbUefiOracleDefPk,
439	GuidVBox, SignatureType_X509);
440
441	i_releaseUefiVariableStore();
442	return hrc;
443	}
444
445
446	HRESULT UefiVariableStore::enrollPlatformKey(const std::vector<BYTE> &aData, const com::Guid &aOwnerUuid)
447	{
448	/* the machine needs to be mutable */
449	AutoMutableStateDependency adep(m->pMachine);
450	if (FAILED(adep.rc())) return adep.rc();
451
452	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
453	if (FAILED(hrc)) return hrc;
454
455	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
456
457	EFI_GUID GuidGlobalVar = EFI_GLOBAL_VARIABLE_GUID;
458	hrc = i_uefiVarStoreAddSignatureToDbVec(&GuidGlobalVar, "PK", aData, aOwnerUuid, SignatureType_X509);
459
460	i_releaseUefiVariableStore();
461	return hrc;
462	}
463
464
465	HRESULT UefiVariableStore::addKek(const std::vector<BYTE> &aData, const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
466	{
467	/* the machine needs to be mutable */
468	AutoMutableStateDependency adep(m->pMachine);
469	if (FAILED(adep.rc())) return adep.rc();
470
471	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
472	if (FAILED(hrc)) return hrc;
473
474	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
475
476	EFI_GUID GuidGlobalVar = EFI_GLOBAL_VARIABLE_GUID;
477	hrc = i_uefiVarStoreAddSignatureToDbVec(&GuidGlobalVar, "KEK", aData, aOwnerUuid, enmSignatureType);
478
479	i_releaseUefiVariableStore();
480	return hrc;
481	}
482
483
484	HRESULT UefiVariableStore::addSignatureToDb(const std::vector<BYTE> &aData, const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
485	{
486	/* the machine needs to be mutable */
487	AutoMutableStateDependency adep(m->pMachine);
488	if (FAILED(adep.rc())) return adep.rc();
489
490	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
491	if (FAILED(hrc)) return hrc;
492
493	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
494
495	EFI_GUID GuidSecurityDb = EFI_GLOBAL_VARIABLE_GUID;
496	hrc = i_uefiVarStoreAddSignatureToDbVec(&GuidSecurityDb, "db", aData, aOwnerUuid, enmSignatureType);
497
498	i_releaseUefiVariableStore();
499	return hrc;
500	}
501
502
503	HRESULT UefiVariableStore::addSignatureToDbx(const std::vector<BYTE> &aData, const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
504	{
505	/* the machine needs to be mutable */
506	AutoMutableStateDependency adep(m->pMachine);
507	if (FAILED(adep.rc())) return adep.rc();
508
509	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
510	if (FAILED(hrc)) return hrc;
511
512	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
513
514	EFI_GUID GuidSecurityDb = EFI_IMAGE_SECURITY_DATABASE_GUID;
515	hrc = i_uefiVarStoreAddSignatureToDbVec(&GuidSecurityDb, "dbx", aData, aOwnerUuid, enmSignatureType);
516
517	i_releaseUefiVariableStore();
518	return hrc;
519	}
520
521
522	HRESULT UefiVariableStore::enrollDefaultMsSignatures(void)
523	{
524	AutoMutableStateDependency adep(m->pMachine);
525	if (FAILED(adep.rc())) return adep.rc();
526
527	HRESULT hrc = i_retainUefiVariableStore(false /fReadonly/);
528	if (FAILED(hrc)) return hrc;
529
530	AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS);
531
532	EFI_GUID EfiGuidSecurityDb = EFI_IMAGE_SECURITY_DATABASE_GUID;
533	EFI_GUID EfiGuidGlobalVar = EFI_GLOBAL_VARIABLE_GUID;
534
535	/** @todo This conversion from EFI GUID -> IPRT UUID -> Com GUID is nuts... */
536	EFI_GUID EfiGuidMs = EFI_SIGNATURE_OWNER_GUID_MICROSOFT;
537	RTUUID UuidMs;
538	RTEfiGuidToUuid(&UuidMs, &EfiGuidMs);
539
540	const com::Guid GuidMs(UuidMs);
541
542	hrc = i_uefiVarStoreAddSignatureToDb(&EfiGuidGlobalVar, "KEK", g_abUefiMicrosoftKek, g_cbUefiMicrosoftKek,
543	GuidMs, SignatureType_X509);
544	if (SUCCEEDED(hrc))
545	{
546	hrc = i_uefiVarStoreAddSignatureToDb(&EfiGuidSecurityDb, "db", g_abUefiMicrosoftCa, g_cbUefiMicrosoftCa,
547	GuidMs, SignatureType_X509);
548	if (SUCCEEDED(hrc))
549	hrc = i_uefiVarStoreAddSignatureToDb(&EfiGuidSecurityDb, "db", g_abUefiMicrosoftProPca, g_cbUefiMicrosoftProPca,
550	GuidMs, SignatureType_X509);
551	}
552
553	i_releaseUefiVariableStore();
554	return hrc;
555	}
556
557
558	/**
559	* Sets the given attributes for the given EFI variable store variable.
560	*
561	* @returns IPRT status code.
562	* @param pszVar The variable to set the attributes for.
563	* @param fAttr The attributes to set, see EFI_VAR_HEADER_ATTR_XXX.
564	*/
565	int UefiVariableStore::i_uefiVarStoreSetVarAttr(const char *pszVar, uint32_t fAttr)
566	{
567	char szVarPath[_1K];
568	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/raw/%s/attr", pszVar);
569	Assert(cch > 0); RT_NOREF(cch);
570
571	RTVFSFILE hVfsFileAttr = NIL_RTVFSFILE;
572	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
573	RTFILE_O_READWRITE \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
574	&hVfsFileAttr);
575	if (RT_SUCCESS(vrc))
576	{
577	uint32_t fAttrLe = RT_H2LE_U32(fAttr);
578	vrc = RTVfsFileWrite(hVfsFileAttr, &fAttrLe, sizeof(fAttrLe), NULL /pcbWritten/);
579	RTVfsFileRelease(hVfsFileAttr);
580	}
581
582	return vrc;
583	}
584
585
586	/**
587	* Queries the attributes for the given EFI variable store variable.
588	*
589	* @returns IPRT status code.
590	* @param pszVar The variable to query the attributes for.
591	* @param pfAttr Where to store the attributes on success.
592	*/
593	int UefiVariableStore::i_uefiVarStoreQueryVarAttr(const char pszVar, uint32_t pfAttr)
594	{
595	char szVarPath[_1K];
596	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/raw/%s/attr", pszVar);
597	Assert(cch > 0); RT_NOREF(cch);
598
599	RTVFSFILE hVfsFileAttr = NIL_RTVFSFILE;
600	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
601	RTFILE_O_READ \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
602	&hVfsFileAttr);
603	if (RT_SUCCESS(vrc))
604	{
605	uint32_t fAttrLe = 0;
606	vrc = RTVfsFileRead(hVfsFileAttr, &fAttrLe, sizeof(fAttrLe), NULL /pcbRead/);
607	RTVfsFileRelease(hVfsFileAttr);
608	if (RT_SUCCESS(vrc))
609	*pfAttr = RT_LE2H_U32(fAttrLe);
610	}
611
612	return vrc;
613	}
614
615
616	/**
617	* Queries the data size for the given variable.
618	*
619	* @returns IPRT status code.
620	* @param pszVar The variable to query the size for.
621	* @param pcbVar Where to store the size of the variable data on success.
622	*/
623	int UefiVariableStore::i_uefiVarStoreQueryVarSz(const char pszVar, uint64_t pcbVar)
624	{
625	char szVarPath[_1K];
626	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/by-name/%s", pszVar);
627	Assert(cch > 0); RT_NOREF(cch);
628
629	RTVFSFILE hVfsFile = NIL_RTVFSFILE;
630	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
631	RTFILE_O_READ \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
632	&hVfsFile);
633	if (RT_SUCCESS(vrc))
634	{
635	vrc = RTVfsFileQuerySize(hVfsFile, pcbVar);
636	RTVfsFileRelease(hVfsFile);
637	}
638	else if (vrc == VERR_PATH_NOT_FOUND)
639	vrc = VERR_FILE_NOT_FOUND;
640
641	return vrc;
642	}
643
644
645	/**
646	* Returns the owner UUID of the given variable.
647	*
648	* @returns IPRT status code.
649	* @param pszVar The variable to query the owner UUID for.
650	* @param pUuid Where to store the owner UUID on success.
651	*/
652	int UefiVariableStore::i_uefiVarStoreQueryVarOwnerUuid(const char *pszVar, PRTUUID pUuid)
653	{
654	char szVarPath[_1K];
655	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/raw/%s/uuid", pszVar);
656	Assert(cch > 0); RT_NOREF(cch);
657
658	RTVFSFILE hVfsFileAttr = NIL_RTVFSFILE;
659	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
660	RTFILE_O_READ \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
661	&hVfsFileAttr);
662	if (RT_SUCCESS(vrc))
663	{
664	EFI_GUID OwnerGuid;
665	vrc = RTVfsFileRead(hVfsFileAttr, &OwnerGuid, sizeof(OwnerGuid), NULL /pcbRead/);
666	RTVfsFileRelease(hVfsFileAttr);
667	if (RT_SUCCESS(vrc))
668	RTEfiGuidToUuid(pUuid, &OwnerGuid);
669	}
670
671	return vrc;
672	}
673
674
675	/**
676	* Converts the given vector of variables attributes to a bitmask used internally.
677	*
678	* @returns Mask of UEFI variable attributes.
679	* @param vecAttributes Vector of variable atttributes.
680	*/
681	uint32_t UefiVariableStore::i_uefiVarAttrToMask(const std::vector<UefiVariableAttributes_T> &vecAttributes)
682	{
683	uint32_t fAttr = 0;
684
685	for (size_t i = 0; i < vecAttributes.size(); i++)
686	fAttr \|= (ULONG)vecAttributes[i];
687
688	return fAttr;
689	}
690
691
692	/**
693	* Converts the given aatribute mask to the attribute vector used externally.
694	*
695	* @returns nothing.
696	* @param fAttr The attribute mask.
697	* @param aAttributes The vector to store the attibutes in.
698	*/
699	void UefiVariableStore::i_uefiAttrMaskToVec(uint32_t fAttr, std::vector<UefiVariableAttributes_T> &aAttributes)
700	{
701	if (fAttr & EFI_VAR_HEADER_ATTR_NON_VOLATILE)
702	aAttributes.push_back(UefiVariableAttributes_NonVolatile);
703	if (fAttr & EFI_VAR_HEADER_ATTR_BOOTSERVICE_ACCESS)
704	aAttributes.push_back(UefiVariableAttributes_BootServiceAccess);
705	if (fAttr & EFI_VAR_HEADER_ATTR_RUNTIME_ACCESS)
706	aAttributes.push_back(UefiVariableAttributes_RuntimeAccess);
707	if (fAttr & EFI_VAR_HEADER_ATTR_HW_ERROR_RECORD)
708	aAttributes.push_back(UefiVariableAttributes_HwErrorRecord);
709	if (fAttr & EFI_AUTH_VAR_HEADER_ATTR_AUTH_WRITE_ACCESS)
710	aAttributes.push_back(UefiVariableAttributes_AuthWriteAccess);
711	if (fAttr & EFI_AUTH_VAR_HEADER_ATTR_TIME_BASED_AUTH_WRITE_ACCESS)
712	aAttributes.push_back(UefiVariableAttributes_AuthTimeBasedWriteAccess);
713	if (fAttr & EFI_AUTH_VAR_HEADER_ATTR_APPEND_WRITE)
714	aAttributes.push_back(UefiVariableAttributes_AuthAppendWrite);
715	}
716
717
718	/**
719	* Retains the reference of the variable store from the parent.
720	*
721	* @returns COM status code.
722	* @param fReadonly Flag whether the access is readonly.
723	*/
724	HRESULT UefiVariableStore::i_retainUefiVariableStore(bool fReadonly)
725	{
726	Assert(m->hVfsUefiVarStore = NIL_RTVFS);
727	return m->pParent->i_retainUefiVarStore(&m->hVfsUefiVarStore, fReadonly);
728	}
729
730
731	/**
732	* Releases the reference of the variable store from the parent.
733	*
734	* @returns COM status code.
735	*/
736	HRESULT UefiVariableStore::i_releaseUefiVariableStore(void)
737	{
738	RTVFS hVfs = m->hVfsUefiVarStore;
739
740	m->hVfsUefiVarStore = NIL_RTVFS;
741	return m->pParent->i_releaseUefiVarStore(hVfs);
742	}
743
744
745	/**
746	* Adds the given variable to the variable store.
747	*
748	* @returns IPRT status code.
749	* @param pGuid The EFI GUID of the variable.
750	* @param pszVar The variable name.
751	* @param fAttr Attributes for the variable.
752	* @param phVfsFile Where to return the VFS file handle to the created variable on success.
753	*/
754	HRESULT UefiVariableStore::i_uefiVarStoreAddVar(PCEFI_GUID pGuid, const char *pszVar, uint32_t fAttr, PRTVFSFILE phVfsFile)
755	{
756	RTUUID UuidVar;
757	RTEfiGuidToUuid(&UuidVar, pGuid);
758
759	char szVarPath[_1K];
760	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/by-uuid/%RTuuid/%s", &UuidVar, pszVar);
761	Assert(cch > 0); RT_NOREF(cch);
762
763	HRESULT hrc = S_OK;
764	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
765	RTFILE_O_READWRITE \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
766	phVfsFile);
767	if ( vrc == VERR_PATH_NOT_FOUND
768	\|\| vrc == VERR_FILE_NOT_FOUND)
769	{
770	/*
771	* Try to create the owner GUID of the variable by creating the appropriate directory,
772	* ignore error if it exists already.
773	*/
774	RTVFSDIR hVfsDirRoot = NIL_RTVFSDIR;
775	vrc = RTVfsOpenRoot(m->hVfsUefiVarStore, &hVfsDirRoot);
776	if (RT_SUCCESS(vrc))
777	{
778	char szGuidPath[_1K];
779	cch = RTStrPrintf2(szGuidPath, sizeof(szGuidPath), "by-uuid/%RTuuid", &UuidVar);
780	Assert(cch > 0);
781
782	RTVFSDIR hVfsDirGuid = NIL_RTVFSDIR;
783	vrc = RTVfsDirCreateDir(hVfsDirRoot, szGuidPath, 0755, 0 /fFlags/, &hVfsDirGuid);
784	if (RT_SUCCESS(vrc))
785	RTVfsDirRelease(hVfsDirGuid);
786	else if (vrc == VERR_ALREADY_EXISTS)
787	vrc = VINF_SUCCESS;
788
789	RTVfsDirRelease(hVfsDirRoot);
790	}
791	else
792	hrc = setError(E_FAIL, tr("Opening variable storage root directory failed: %Rrc"), vrc);
793
794	if (RT_SUCCESS(vrc))
795	{
796	vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
797	RTFILE_O_READWRITE \| RTFILE_O_DENY_NONE \| RTFILE_O_CREATE,
798	phVfsFile);
799	if (RT_SUCCESS(vrc))
800	vrc = i_uefiVarStoreSetVarAttr(pszVar, fAttr);
801	}
802
803	if (RT_FAILURE(vrc))
804	hrc = setError(E_FAIL, tr("Creating the variable '%s' failed: %Rrc"), pszVar, vrc);
805	}
806
807	return hrc;
808	}
809
810
811	/**
812	* Tries to open the given variable from the variable store and returns a file handle.
813	*
814	* @returns IPRT status code.
815	* @param pszVar The variable name.
816	* @param phVfsFile Where to return the VFS file handle to the created variable on success.
817	*/
818	HRESULT UefiVariableStore::i_uefiVarStoreOpenVar(const char *pszVar, PRTVFSFILE phVfsFile)
819	{
820	char szVarPath[_1K];
821	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/by-name/%s", pszVar);
822	Assert(cch > 0); RT_NOREF(cch);
823
824	HRESULT hrc = S_OK;
825	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
826	RTFILE_O_READWRITE \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
827	phVfsFile);
828	if ( vrc == VERR_PATH_NOT_FOUND
829	\|\| vrc == VERR_FILE_NOT_FOUND)
830	hrc = setError(VBOX_E_OBJECT_NOT_FOUND, tr("The variable '%s' could not be found"), pszVar);
831	else if (RT_FAILURE(vrc))
832	hrc = setError(VBOX_E_IPRT_ERROR, tr("Couldn't open variable '%s' (%Rrc)"), pszVar, vrc);
833
834	return hrc;
835	}
836
837
838	HRESULT UefiVariableStore::i_uefiVarStoreSetVar(PCEFI_GUID pGuid, const char pszVar, uint32_t fAttr, const void pvData, size_t cbData)
839	{
840	RTVFSFILE hVfsFileVar = NIL_RTVFSFILE;
841
842	HRESULT hrc = i_uefiVarStoreAddVar(pGuid, pszVar, fAttr, &hVfsFileVar);
843	if (SUCCEEDED(hrc))
844	{
845	int vrc = RTVfsFileWrite(hVfsFileVar, pvData, cbData, NULL /pcbWritten/);
846	if (RT_FAILURE(vrc))
847	hrc = setError(E_FAIL, tr("Setting the variable '%s' failed: %Rrc"), pszVar, vrc);
848
849	RTVfsFileRelease(hVfsFileVar);
850	}
851
852	return hrc;
853	}
854
855
856	HRESULT UefiVariableStore::i_uefiVarStoreQueryVar(const char pszVar, void pvData, size_t cbData)
857	{
858	HRESULT hrc = S_OK;
859
860	char szVarPath[_1K];
861	ssize_t cch = RTStrPrintf2(szVarPath, sizeof(szVarPath), "/by-name/%s", pszVar);
862	Assert(cch > 0); RT_NOREF(cch);
863
864	RTVFSFILE hVfsFile = NIL_RTVFSFILE;
865	int vrc = RTVfsFileOpen(m->hVfsUefiVarStore, szVarPath,
866	RTFILE_O_READ \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN,
867	&hVfsFile);
868	if (RT_SUCCESS(vrc))
869	{
870	vrc = RTVfsFileRead(hVfsFile, pvData, cbData, NULL /pcbRead/);
871	if (RT_FAILURE(vrc))
872	hrc = setError(E_FAIL, tr("Failed to read data of variable '%s': %Rrc"), pszVar, vrc);
873
874	RTVfsFileRelease(hVfsFile);
875	}
876	else
877	hrc = setError(E_FAIL, tr("Failed to open variable '%s' for reading: %Rrc"), pszVar, vrc);
878
879	return hrc;
880	}
881
882	HRESULT UefiVariableStore::i_uefiSigDbAddSig(RTEFISIGDB hEfiSigDb, const void *pvData, size_t cbData,
883	const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
884	{
885	RTEFISIGTYPE enmSigType = RTEFISIGTYPE_INVALID;
886
887	switch (enmSignatureType)
888	{
889	case SignatureType_X509:
890	enmSigType = RTEFISIGTYPE_X509;
891	break;
892	case SignatureType_Sha256:
893	enmSigType = RTEFISIGTYPE_SHA256;
894	break;
895	default:
896	return setError(E_FAIL, tr("The given signature type is not supported"));
897	}
898
899	int vrc = RTEfiSigDbAddSignatureFromBuf(hEfiSigDb, enmSigType, aOwnerUuid.raw(), pvData, cbData);
900	if (RT_SUCCESS(vrc))
901	return S_OK;
902
903	return setError(E_FAIL, tr("Failed to add signature to the database (%Rrc)"), vrc);
904	}
905
906
907	HRESULT UefiVariableStore::i_uefiVarStoreAddSignatureToDb(PCEFI_GUID pGuid, const char pszDb, const void pvData, size_t cbData,
908	const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
909	{
910	RTVFSFILE hVfsFileSigDb = NIL_RTVFSFILE;
911
912	HRESULT hrc = i_uefiVarStoreAddVar(pGuid, pszDb,
913	EFI_VAR_HEADER_ATTR_NON_VOLATILE
914	\| EFI_VAR_HEADER_ATTR_BOOTSERVICE_ACCESS
915	\| EFI_VAR_HEADER_ATTR_RUNTIME_ACCESS
916	\| EFI_AUTH_VAR_HEADER_ATTR_TIME_BASED_AUTH_WRITE_ACCESS,
917	&hVfsFileSigDb);
918	if (SUCCEEDED(hrc))
919	{
920	RTEFISIGDB hEfiSigDb;
921
922	int vrc = RTEfiSigDbCreate(&hEfiSigDb);
923	if (RT_SUCCESS(vrc))
924	{
925	vrc = RTEfiSigDbAddFromExistingDb(hEfiSigDb, hVfsFileSigDb);
926	if (RT_SUCCESS(vrc))
927	{
928	hrc = i_uefiSigDbAddSig(hEfiSigDb, pvData, cbData, aOwnerUuid, enmSignatureType);
929	if (SUCCEEDED(hrc))
930	{
931	vrc = RTVfsFileSeek(hVfsFileSigDb, 0 /offSeek/, RTFILE_SEEK_BEGIN, NULL /poffActual/);
932	AssertRC(vrc);
933
934	vrc = RTEfiSigDbWriteToFile(hEfiSigDb, hVfsFileSigDb);
935	if (RT_FAILURE(vrc))
936	hrc = setError(E_FAIL, tr("Writing updated signature database failed: %Rrc"), vrc);
937	}
938	}
939	else
940	hrc = setError(E_FAIL, tr("Loading signature database failed: %Rrc"), vrc);
941
942	RTEfiSigDbDestroy(hEfiSigDb);
943	}
944	else
945	hrc = setError(E_FAIL, tr("Creating signature database failed: %Rrc"), vrc);
946
947	RTVfsFileRelease(hVfsFileSigDb);
948	}
949
950	return hrc;
951	}
952
953
954	HRESULT UefiVariableStore::i_uefiVarStoreAddSignatureToDbVec(PCEFI_GUID pGuid, const char *pszDb, const std::vector<BYTE> &aData,
955	const com::Guid &aOwnerUuid, SignatureType_T enmSignatureType)
956	{
957	return i_uefiVarStoreAddSignatureToDb(pGuid, pszDb, &aData.front(), aData.size(), aOwnerUuid, enmSignatureType);
958	}
959
960	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-server/UefiVariableStoreImpl.cpp@ 98103

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