ExtPackUtil.cpp@ 72168

Last change on this file since 72168 was 68828, checked in by vboxsync, 7 years ago
ExtPack: Split up main module of extension pack, have a mandatory one for VBoxSVC and an optional one for the VM process. This finally eliminates the need to drag VBoxVMM into VBoxSVC on some platforms. Many other small cleanups, including reliably calling the unload hook from within a VM process, copy/paste with forgotten adjustments (e.g. extpacks still talking about skeleton) and spelling fixes.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 49.6 KB

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1	/* $Id: ExtPackUtil.cpp 68828 2017-09-22 14:15:57Z vboxsync $ */
2	/** @file
3	* VirtualBox Main - Extension Pack Utilities and definitions, VBoxC, VBoxSVC, ++.
4	*/
5
6	/*
7	* Copyright (C) 2010-2017 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
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#include "../include/ExtPackUtil.h"
23
24	#include <iprt/ctype.h>
25	#include <iprt/dir.h>
26	#include <iprt/file.h>
27	#include <iprt/manifest.h>
28	#include <iprt/param.h>
29	#include <iprt/path.h>
30	#include <iprt/sha.h>
31	#include <iprt/string.h>
32	#include <iprt/vfs.h>
33	#include <iprt/tar.h>
34	#include <iprt/zip.h>
35	#include <iprt/cpp/xml.h>
36
37	#include <VBox/log.h>
38
39
40	/**
41	* Worker for VBoxExtPackLoadDesc that loads the plug-in descriptors.
42	*
43	* @returns Same as VBoxExtPackLoadDesc.
44	* @param pVBoxExtPackElm
45	* @param pcPlugIns Where to return the number of plug-ins in the
46	* array.
47	* @param paPlugIns Where to return the plug-in descriptor array.
48	* (RTMemFree it even on failure)
49	*/
50	static RTCString *
51	vboxExtPackLoadPlugInDescs(const xml::ElementNode *pVBoxExtPackElm,
52	uint32_t pcPlugIns, PVBOXEXTPACKPLUGINDESC paPlugIns)
53	{
54	*pcPlugIns = 0;
55	*paPlugIns = NULL;
56
57	/** @todo plug-ins */
58	NOREF(pVBoxExtPackElm);
59
60	return NULL;
61	}
62
63	/**
64	* Clears the extension pack descriptor.
65	*
66	* @param a_pExtPackDesc The descriptor to clear.
67	*/
68	static void vboxExtPackClearDesc(PVBOXEXTPACKDESC a_pExtPackDesc)
69	{
70	a_pExtPackDesc->strName.setNull();
71	a_pExtPackDesc->strDescription.setNull();
72	a_pExtPackDesc->strVersion.setNull();
73	a_pExtPackDesc->strEdition.setNull();
74	a_pExtPackDesc->uRevision = 0;
75	a_pExtPackDesc->strMainModule.setNull();
76	a_pExtPackDesc->strMainVMModule.setNull();
77	a_pExtPackDesc->strVrdeModule.setNull();
78	a_pExtPackDesc->cPlugIns = 0;
79	a_pExtPackDesc->paPlugIns = NULL;
80	a_pExtPackDesc->fShowLicense = false;
81	}
82
83	/**
84	* Initializes an extension pack descriptor so that it's safe to call free on
85	* it whatever happens later on.
86	*
87	* @param a_pExtPackDesc The descirptor to initialize.
88	*/
89	void VBoxExtPackInitDesc(PVBOXEXTPACKDESC a_pExtPackDesc)
90	{
91	vboxExtPackClearDesc(a_pExtPackDesc);
92	}
93
94
95	/**
96	* Load the extension pack descriptor from an XML document.
97	*
98	* @returns NULL on success, pointer to an error message on failure (caller
99	* deletes it).
100	* @param a_pDoc Pointer to the XML document.
101	* @param a_pExtPackDesc Where to store the extension pack descriptor.
102	*/
103	static RTCString vboxExtPackLoadDescFromDoc(xml::Document a_pDoc, PVBOXEXTPACKDESC a_pExtPackDesc)
104	{
105	/*
106	* Get the main element and check its version.
107	*/
108	const xml::ElementNode *pVBoxExtPackElm = a_pDoc->getRootElement();
109	if ( !pVBoxExtPackElm
110	\|\| strcmp(pVBoxExtPackElm->getName(), "VirtualBoxExtensionPack") != 0)
111	return new RTCString("No VirtualBoxExtensionPack element");
112
113	RTCString strFormatVersion;
114	if (!pVBoxExtPackElm->getAttributeValue("version", strFormatVersion))
115	return new RTCString("Missing format version");
116	if (!strFormatVersion.equals("1.0"))
117	return &(new RTCString("Unsupported format version: "))->append(strFormatVersion);
118
119	/*
120	* Read and validate mandatory bits.
121	*/
122	const xml::ElementNode *pNameElm = pVBoxExtPackElm->findChildElement("Name");
123	if (!pNameElm)
124	return new RTCString("The 'Name' element is missing");
125	const char *pszName = pNameElm->getValue();
126	if (!VBoxExtPackIsValidName(pszName))
127	return &(new RTCString("Invalid name: "))->append(pszName);
128
129	const xml::ElementNode *pDescElm = pVBoxExtPackElm->findChildElement("Description");
130	if (!pDescElm)
131	return new RTCString("The 'Description' element is missing");
132	const char *pszDesc = pDescElm->getValue();
133	if (!pszDesc \|\| *pszDesc == '\0')
134	return new RTCString("The 'Description' element is empty");
135	if (strpbrk(pszDesc, "\n\r\t\v\b") != NULL)
136	return new RTCString("The 'Description' must not contain control characters");
137
138	const xml::ElementNode *pVersionElm = pVBoxExtPackElm->findChildElement("Version");
139	if (!pVersionElm)
140	return new RTCString("The 'Version' element is missing");
141	const char *pszVersion = pVersionElm->getValue();
142	if (!pszVersion \|\| *pszVersion == '\0')
143	return new RTCString("The 'Version' element is empty");
144	if (!VBoxExtPackIsValidVersionString(pszVersion))
145	return &(new RTCString("Invalid version string: "))->append(pszVersion);
146
147	uint32_t uRevision;
148	if (!pVersionElm->getAttributeValue("revision", uRevision))
149	uRevision = 0;
150
151	const char *pszEdition;
152	if (!pVersionElm->getAttributeValue("edition", pszEdition))
153	pszEdition = "";
154	if (!VBoxExtPackIsValidEditionString(pszEdition))
155	return &(new RTCString("Invalid edition string: "))->append(pszEdition);
156
157	const xml::ElementNode *pMainModuleElm = pVBoxExtPackElm->findChildElement("MainModule");
158	if (!pMainModuleElm)
159	return new RTCString("The 'MainModule' element is missing");
160	const char *pszMainModule = pMainModuleElm->getValue();
161	if (!pszMainModule \|\| *pszMainModule == '\0')
162	return new RTCString("The 'MainModule' element is empty");
163	if (!VBoxExtPackIsValidModuleString(pszMainModule))
164	return &(new RTCString("Invalid main module string: "))->append(pszMainModule);
165
166	/*
167	* The main VM module, optional.
168	* Accept both none and empty as tokens of no main VM module.
169	*/
170	const char *pszMainVMModule = NULL;
171	const xml::ElementNode *pMainVMModuleElm = pVBoxExtPackElm->findChildElement("MainVMModule");
172	if (pMainVMModuleElm)
173	{
174	pszMainVMModule = pMainVMModuleElm->getValue();
175	if (!pszMainVMModule \|\| *pszMainVMModule == '\0')
176	pszMainVMModule = NULL;
177	else if (!VBoxExtPackIsValidModuleString(pszMainVMModule))
178	return &(new RTCString("Invalid main VM module string: "))->append(pszMainVMModule);
179	}
180
181	/*
182	* The VRDE module, optional.
183	* Accept both none and empty as tokens of no VRDE module.
184	*/
185	const char *pszVrdeModule = NULL;
186	const xml::ElementNode *pVrdeModuleElm = pVBoxExtPackElm->findChildElement("VRDEModule");
187	if (pVrdeModuleElm)
188	{
189	pszVrdeModule = pVrdeModuleElm->getValue();
190	if (!pszVrdeModule \|\| *pszVrdeModule == '\0')
191	pszVrdeModule = NULL;
192	else if (!VBoxExtPackIsValidModuleString(pszVrdeModule))
193	return &(new RTCString("Invalid VRDE module string: "))->append(pszVrdeModule);
194	}
195
196	/*
197	* Whether to show the license, optional. (presense is enough here)
198	*/
199	const xml::ElementNode *pShowLicenseElm = pVBoxExtPackElm->findChildElement("ShowLicense");
200	bool fShowLicense = pShowLicenseElm != NULL;
201
202	/*
203	* Parse plug-in descriptions (last because of the manual memory management).
204	*/
205	uint32_t cPlugIns = 0;
206	PVBOXEXTPACKPLUGINDESC paPlugIns = NULL;
207	RTCString *pstrRet = vboxExtPackLoadPlugInDescs(pVBoxExtPackElm, &cPlugIns, &paPlugIns);
208	if (pstrRet)
209	{
210	RTMemFree(paPlugIns);
211	return pstrRet;
212	}
213
214	/*
215	* Everything seems fine, fill in the return values and return successfully.
216	*/
217	a_pExtPackDesc->strName = pszName;
218	a_pExtPackDesc->strDescription = pszDesc;
219	a_pExtPackDesc->strVersion = pszVersion;
220	a_pExtPackDesc->strEdition = pszEdition;
221	a_pExtPackDesc->uRevision = uRevision;
222	a_pExtPackDesc->strMainModule = pszMainModule;
223	a_pExtPackDesc->strMainVMModule = pszMainVMModule;
224	a_pExtPackDesc->strVrdeModule = pszVrdeModule;
225	a_pExtPackDesc->cPlugIns = cPlugIns;
226	a_pExtPackDesc->paPlugIns = paPlugIns;
227	a_pExtPackDesc->fShowLicense = fShowLicense;
228
229	return NULL;
230	}
231
232	/**
233	* Reads the extension pack descriptor.
234	*
235	* @returns NULL on success, pointer to an error message on failure (caller
236	* deletes it).
237	* @param a_pszDir The directory containing the description file.
238	* @param a_pExtPackDesc Where to store the extension pack descriptor.
239	* @param a_pObjInfo Where to store the object info for the file (unix
240	* attribs). Optional.
241	*/
242	RTCString VBoxExtPackLoadDesc(const char a_pszDir, PVBOXEXTPACKDESC a_pExtPackDesc, PRTFSOBJINFO a_pObjInfo)
243	{
244	vboxExtPackClearDesc(a_pExtPackDesc);
245
246	/*
247	* Validate, open and parse the XML file.
248	*/
249	char szFilePath[RTPATH_MAX];
250	int vrc = RTPathJoin(szFilePath, sizeof(szFilePath), a_pszDir, VBOX_EXTPACK_DESCRIPTION_NAME);
251	if (RT_FAILURE(vrc))
252	return new RTCString("RTPathJoin failed with %Rrc", vrc);
253
254	RTFSOBJINFO ObjInfo;
255	vrc = RTPathQueryInfoEx(szFilePath, &ObjInfo, RTFSOBJATTRADD_UNIX, RTPATH_F_ON_LINK);
256	if (RT_FAILURE(vrc))
257	return &(new RTCString())->printf("RTPathQueryInfoEx failed with %Rrc", vrc);
258	if (a_pObjInfo)
259	*a_pObjInfo = ObjInfo;
260	if (!RTFS_IS_FILE(ObjInfo.Attr.fMode))
261	{
262	if (RTFS_IS_SYMLINK(ObjInfo.Attr.fMode))
263	return new RTCString("The XML file is symlinked, that is not allowed");
264	return &(new RTCString)->printf("The XML file is not a file (fMode=%#x)", ObjInfo.Attr.fMode);
265	}
266
267	xml::Document Doc;
268	{
269	xml::XmlFileParser Parser;
270	try
271	{
272	Parser.read(szFilePath, Doc);
273	}
274	catch (xml::XmlError Err)
275	{
276	return new RTCString(Err.what());
277	}
278	}
279
280	/*
281	* Hand the xml doc over to the common code.
282	*/
283	return vboxExtPackLoadDescFromDoc(&Doc, a_pExtPackDesc);
284	}
285
286	/**
287	* Reads the extension pack descriptor.
288	*
289	* @returns NULL on success, pointer to an error message on failure (caller
290	* deletes it).
291	* @param hVfsFile The file handle of the description file.
292	* @param a_pExtPackDesc Where to store the extension pack descriptor.
293	* @param a_pObjInfo Where to store the object info for the file (unix
294	* attribs). Optional.
295	*/
296	RTCString *VBoxExtPackLoadDescFromVfsFile(RTVFSFILE hVfsFile, PVBOXEXTPACKDESC a_pExtPackDesc, PRTFSOBJINFO a_pObjInfo)
297	{
298	vboxExtPackClearDesc(a_pExtPackDesc);
299
300	/*
301	* Query the object info.
302	*/
303	RTFSOBJINFO ObjInfo;
304	int rc = RTVfsFileQueryInfo(hVfsFile, &ObjInfo, RTFSOBJATTRADD_UNIX);
305	if (RT_FAILURE(rc))
306	return &(new RTCString)->printf("RTVfsFileQueryInfo failed: %Rrc", rc);
307	if (a_pObjInfo)
308	*a_pObjInfo = ObjInfo;
309
310	/*
311	* The simple approach, read the whole thing into memory and pass this to
312	* the XML parser.
313	*/
314
315	/* Check the file size. */
316	if (ObjInfo.cbObject > _1M \|\| ObjInfo.cbObject < 0)
317	return &(new RTCString)->printf("The XML file is too large (%'RU64 bytes)", ObjInfo.cbObject);
318	size_t const cbFile = (size_t)ObjInfo.cbObject;
319
320	/* Rewind to the start of the file. */
321	rc = RTVfsFileSeek(hVfsFile, 0, RTFILE_SEEK_BEGIN, NULL);
322	if (RT_FAILURE(rc))
323	return &(new RTCString)->printf("RTVfsFileSeek(,0,BEGIN) failed: %Rrc", rc);
324
325	/* Allocate memory and read the file content into it. */
326	void *pvFile = RTMemTmpAlloc(cbFile);
327	if (!pvFile)
328	return &(new RTCString)->printf("RTMemTmpAlloc(%zu) failed", cbFile);
329
330	RTCString *pstrErr = NULL;
331	rc = RTVfsFileRead(hVfsFile, pvFile, cbFile, NULL);
332	if (RT_FAILURE(rc))
333	pstrErr = &(new RTCString)->printf("RTVfsFileRead failed: %Rrc", rc);
334
335	/*
336	* Parse the file.
337	*/
338	xml::Document Doc;
339	if (RT_SUCCESS(rc))
340	{
341	xml::XmlMemParser Parser;
342	RTCString strFileName = VBOX_EXTPACK_DESCRIPTION_NAME;
343	try
344	{
345	Parser.read(pvFile, cbFile, strFileName, Doc);
346	}
347	catch (xml::XmlError Err)
348	{
349	pstrErr = new RTCString(Err.what());
350	rc = VERR_PARSE_ERROR;
351	}
352	}
353	RTMemTmpFree(pvFile);
354
355	/*
356	* Hand the xml doc over to the common code.
357	*/
358	if (RT_SUCCESS(rc))
359	pstrErr = vboxExtPackLoadDescFromDoc(&Doc, a_pExtPackDesc);
360
361	return pstrErr;
362	}
363
364	/**
365	* Frees all resources associated with a extension pack descriptor.
366	*
367	* @param a_pExtPackDesc The extension pack descriptor which members
368	* should be freed.
369	*/
370	void VBoxExtPackFreeDesc(PVBOXEXTPACKDESC a_pExtPackDesc)
371	{
372	if (!a_pExtPackDesc)
373	return;
374
375	a_pExtPackDesc->strName.setNull();
376	a_pExtPackDesc->strDescription.setNull();
377	a_pExtPackDesc->strVersion.setNull();
378	a_pExtPackDesc->strEdition.setNull();
379	a_pExtPackDesc->uRevision = 0;
380	a_pExtPackDesc->strMainModule.setNull();
381	a_pExtPackDesc->strMainVMModule.setNull();
382	a_pExtPackDesc->strVrdeModule.setNull();
383	a_pExtPackDesc->cPlugIns = 0;
384	RTMemFree(a_pExtPackDesc->paPlugIns);
385	a_pExtPackDesc->paPlugIns = NULL;
386	a_pExtPackDesc->fShowLicense = false;
387	}
388
389	/**
390	* Extract the extension pack name from the tarball path.
391	*
392	* @returns String containing the name on success, the caller must delete it.
393	* NULL if no valid name was found or if we ran out of memory.
394	* @param pszTarball The path to the tarball.
395	*/
396	RTCString VBoxExtPackExtractNameFromTarballPath(const char pszTarball)
397	{
398	/*
399	* Skip ahead to the filename part and count the number of characters
400	* that matches the criteria for a mangled extension pack name.
401	*/
402	const char *pszSrc = RTPathFilename(pszTarball);
403	if (!pszSrc)
404	return NULL;
405
406	size_t off = 0;
407	while (RT_C_IS_ALNUM(pszSrc[off]) \|\| pszSrc[off] == '_')
408	off++;
409
410	/*
411	* Check min and max name limits.
412	*/
413	if ( off > VBOX_EXTPACK_NAME_MAX_LEN
414	\|\| off < VBOX_EXTPACK_NAME_MIN_LEN)
415	return NULL;
416
417	/*
418	* Return the unmangled name.
419	*/
420	return VBoxExtPackUnmangleName(pszSrc, off);
421	}
422
423	/**
424	* Validates the extension pack name.
425	*
426	* @returns true if valid, false if not.
427	* @param pszName The name to validate.
428	* @sa VBoxExtPackExtractNameFromTarballPath
429	*/
430	bool VBoxExtPackIsValidName(const char *pszName)
431	{
432	if (!pszName)
433	return false;
434
435	/*
436	* Check the characters making up the name, only english alphabet
437	* characters, decimal digits and spaces are allowed.
438	*/
439	size_t off = 0;
440	while (pszName[off])
441	{
442	if (!RT_C_IS_ALNUM(pszName[off]) && pszName[off] != ' ')
443	return false;
444	off++;
445	}
446
447	/*
448	* Check min and max name limits.
449	*/
450	if ( off > VBOX_EXTPACK_NAME_MAX_LEN
451	\|\| off < VBOX_EXTPACK_NAME_MIN_LEN)
452	return false;
453
454	return true;
455	}
456
457	/**
458	* Checks if an alledged manged extension pack name.
459	*
460	* @returns true if valid, false if not.
461	* @param pszMangledName The mangled name to validate.
462	* @param cchMax The max number of chars to test.
463	* @sa VBoxExtPackMangleName
464	*/
465	bool VBoxExtPackIsValidMangledName(const char pszMangledName, size_t cchMax /= RTSTR_MAX*/)
466	{
467	if (!pszMangledName)
468	return false;
469
470	/*
471	* Check the characters making up the name, only english alphabet
472	* characters, decimal digits and underscores (=space) are allowed.
473	*/
474	size_t off = 0;
475	while (off < cchMax && pszMangledName[off])
476	{
477	if (!RT_C_IS_ALNUM(pszMangledName[off]) && pszMangledName[off] != '_')
478	return false;
479	off++;
480	}
481
482	/*
483	* Check min and max name limits.
484	*/
485	if ( off > VBOX_EXTPACK_NAME_MAX_LEN
486	\|\| off < VBOX_EXTPACK_NAME_MIN_LEN)
487	return false;
488
489	return true;
490	}
491
492	/**
493	* Mangle an extension pack name so it can be used by a directory or file name.
494	*
495	* @returns String containing the mangled name on success, the caller must
496	* delete it. NULL on failure.
497	* @param pszName The unmangled name.
498	* @sa VBoxExtPackUnmangleName, VBoxExtPackIsValidMangledName
499	*/
500	RTCString VBoxExtPackMangleName(const char pszName)
501	{
502	AssertReturn(VBoxExtPackIsValidName(pszName), NULL);
503
504	char szTmp[VBOX_EXTPACK_NAME_MAX_LEN + 1];
505	size_t off = 0;
506	char ch;
507	while ((ch = pszName[off]) != '\0')
508	{
509	if (ch == ' ')
510	ch = '_';
511	szTmp[off++] = ch;
512	}
513	szTmp[off] = '\0';
514	Assert(VBoxExtPackIsValidMangledName(szTmp));
515
516	return new RTCString(szTmp, off);
517	}
518
519	/**
520	* Unmangle an extension pack name (reverses VBoxExtPackMangleName).
521	*
522	* @returns String containing the mangled name on success, the caller must
523	* delete it. NULL on failure.
524	* @param pszMangledName The mangled name.
525	* @param cchMax The max name length. RTSTR_MAX is fine.
526	* @sa VBoxExtPackMangleName, VBoxExtPackIsValidMangledName
527	*/
528	RTCString VBoxExtPackUnmangleName(const char pszMangledName, size_t cchMax)
529	{
530	AssertReturn(VBoxExtPackIsValidMangledName(pszMangledName, cchMax), NULL);
531
532	char szTmp[VBOX_EXTPACK_NAME_MAX_LEN + 1];
533	size_t off = 0;
534	char ch;
535	while ( off < cchMax
536	&& (ch = pszMangledName[off]) != '\0')
537	{
538	if (ch == '_')
539	ch = ' ';
540	else
541	AssertReturn(RT_C_IS_ALNUM(ch) \|\| ch == ' ', NULL);
542	szTmp[off++] = ch;
543	}
544	szTmp[off] = '\0';
545	AssertReturn(VBoxExtPackIsValidName(szTmp), NULL);
546
547	return new RTCString(szTmp, off);
548	}
549
550	/**
551	* Constructs the extension pack directory path.
552	*
553	* A combination of RTPathJoin and VBoxExtPackMangleName.
554	*
555	* @returns IPRT status code like RTPathJoin.
556	* @param pszExtPackDir Where to return the directory path.
557	* @param cbExtPackDir The size of the return buffer.
558	* @param pszParentDir The parent directory (".../Extensions").
559	* @param pszName The extension pack name, unmangled.
560	*/
561	int VBoxExtPackCalcDir(char pszExtPackDir, size_t cbExtPackDir, const char pszParentDir, const char *pszName)
562	{
563	AssertReturn(VBoxExtPackIsValidName(pszName), VERR_INTERNAL_ERROR_5);
564
565	RTCString *pstrMangledName = VBoxExtPackMangleName(pszName);
566	if (!pstrMangledName)
567	return VERR_INTERNAL_ERROR_4;
568
569	int vrc = RTPathJoin(pszExtPackDir, cbExtPackDir, pszParentDir, pstrMangledName->c_str());
570	delete pstrMangledName;
571
572	return vrc;
573	}
574
575
576	/**
577	* Validates the extension pack version string.
578	*
579	* @returns true if valid, false if not.
580	* @param pszVersion The version string to validate.
581	*/
582	bool VBoxExtPackIsValidVersionString(const char *pszVersion)
583	{
584	if (!pszVersion \|\| *pszVersion == '\0')
585	return false;
586
587	/* 1.x.y.z... */
588	for (;;)
589	{
590	if (!RT_C_IS_DIGIT(*pszVersion))
591	return false;
592	do
593	pszVersion++;
594	while (RT_C_IS_DIGIT(*pszVersion));
595	if (*pszVersion != '.')
596	break;
597	pszVersion++;
598	}
599
600	/* upper case string + numbers indicating the build type */
601	if (pszVersion == '-' \|\| pszVersion == '_')
602	{
603	/** @todo Should probably restrict this to known build types (alpha,
604	* beta, rc, ++). */
605	do
606	pszVersion++;
607	while ( RT_C_IS_DIGIT(*pszVersion)
608	\|\| RT_C_IS_UPPER(*pszVersion)
609	\|\| *pszVersion == '-'
610	\|\| *pszVersion == '_');
611	}
612
613	return *pszVersion == '\0';
614	}
615
616	/**
617	* Validates the extension pack edition string.
618	*
619	* @returns true if valid, false if not.
620	* @param pszEdition The edition string to validate.
621	*/
622	bool VBoxExtPackIsValidEditionString(const char *pszEdition)
623	{
624	if (*pszEdition)
625	{
626	if (!RT_C_IS_UPPER(*pszEdition))
627	return false;
628
629	do
630	pszEdition++;
631	while ( RT_C_IS_UPPER(*pszEdition)
632	\|\| RT_C_IS_DIGIT(*pszEdition)
633	\|\| *pszEdition == '-'
634	\|\| *pszEdition == '_');
635	}
636	return *pszEdition == '\0';
637	}
638
639	/**
640	* Validates an extension pack module string.
641	*
642	* @returns true if valid, false if not.
643	* @param pszModule The module string to validate.
644	*/
645	bool VBoxExtPackIsValidModuleString(const char *pszModule)
646	{
647	if (!pszModule \|\| *pszModule == '\0')
648	return false;
649
650	/* Restricted charset, no extensions (dots). */
651	while ( RT_C_IS_ALNUM(*pszModule)
652	\|\| *pszModule == '-'
653	\|\| *pszModule == '_')
654	pszModule++;
655
656	return *pszModule == '\0';
657	}
658
659	/**
660	* RTStrPrintfv wrapper.
661	*
662	* @returns @a rc
663	* @param rc The status code to return.
664	* @param pszError The error buffer.
665	* @param cbError The size of the buffer.
666	* @param pszFormat The error message format string.
667	* @param ... Format arguments.
668	*/
669	static int vboxExtPackReturnError(int rc, char pszError, size_t cbError, const char pszFormat, ...)
670	{
671	va_list va;
672	va_start(va, pszFormat);
673	RTStrPrintfV(pszError, cbError, pszFormat, va);
674	va_end(va);
675	return rc;
676	}
677
678	/**
679	* RTStrPrintfv wrapper.
680	*
681	* @param pszError The error buffer.
682	* @param cbError The size of the buffer.
683	* @param pszFormat The error message format string.
684	* @param ... Format arguments.
685	*/
686	static void vboxExtPackSetError(char pszError, size_t cbError, const char pszFormat, ...)
687	{
688	va_list va;
689	va_start(va, pszFormat);
690	RTStrPrintfV(pszError, cbError, pszFormat, va);
691	va_end(va);
692	}
693
694	/**
695	* Verifies the manifest and its signature.
696	*
697	* @returns VBox status code, failures with message.
698	* @param hXmlFile The xml from the extension pack.
699	* @param pszExtPackName The expected extension pack name. This can be
700	* NULL, in which we don't have any expectations.
701	* @param pszError Where to store an error message on failure.
702	* @param cbError The size of the buffer @a pszError points to.
703	*/
704	static int vboxExtPackVerifyXml(RTVFSFILE hXmlFile, const char pszExtPackName, char pszError, size_t cbError)
705	{
706	/*
707	* Load the XML.
708	*/
709	VBOXEXTPACKDESC ExtPackDesc;
710	RTCString *pstrErr = VBoxExtPackLoadDescFromVfsFile(hXmlFile, &ExtPackDesc, NULL);
711	if (pstrErr)
712	{
713	RTStrCopy(pszError, cbError, pstrErr->c_str());
714	delete pstrErr;
715	return VERR_PARSE_ERROR;
716	}
717
718	/*
719	* Check the name.
720	*/
721	/** @todo drop this restriction after the old install interface is
722	* dropped. */
723	int rc = VINF_SUCCESS;
724	if ( pszExtPackName
725	&& !ExtPackDesc.strName.equalsIgnoreCase(pszExtPackName))
726	rc = vboxExtPackReturnError(VERR_NOT_EQUAL, pszError, cbError,
727	"The name of the downloaded file and the name stored inside the extension pack does not match"
728	" (xml='%s' file='%s')", ExtPackDesc.strName.c_str(), pszExtPackName);
729	return rc;
730	}
731
732	/**
733	* Verifies the manifest and its signature.
734	*
735	* @returns VBox status code, failures with message.
736	* @param hOurManifest The manifest we compiled.
737	* @param hManifestFile The manifest file in the extension pack.
738	* @param hSignatureFile The manifest signature file.
739	* @param pszError Where to store an error message on failure.
740	* @param cbError The size of the buffer @a pszError points to.
741	*/
742	static int vboxExtPackVerifyManifestAndSignature(RTMANIFEST hOurManifest, RTVFSFILE hManifestFile, RTVFSFILE hSignatureFile,
743	char *pszError, size_t cbError)
744	{
745	/*
746	* Read the manifest from the extension pack.
747	*/
748	int rc = RTVfsFileSeek(hManifestFile, 0, RTFILE_SEEK_BEGIN, NULL);
749	if (RT_FAILURE(rc))
750	return vboxExtPackReturnError(rc, pszError, cbError, "RTVfsFileSeek failed: %Rrc", rc);
751
752	RTMANIFEST hTheirManifest;
753	rc = RTManifestCreate(0 /fFlags/, &hTheirManifest);
754	if (RT_FAILURE(rc))
755	return vboxExtPackReturnError(rc, pszError, cbError, "RTManifestCreate failed: %Rrc", rc);
756
757	RTVFSIOSTREAM hVfsIos = RTVfsFileToIoStream(hManifestFile);
758	rc = RTManifestReadStandard(hTheirManifest, hVfsIos);
759	RTVfsIoStrmRelease(hVfsIos);
760	if (RT_SUCCESS(rc))
761	{
762	/*
763	* Compare the manifests.
764	*/
765	static const char *s_apszIgnoreEntries[] =
766	{
767	VBOX_EXTPACK_MANIFEST_NAME,
768	VBOX_EXTPACK_SIGNATURE_NAME,
769	"./" VBOX_EXTPACK_MANIFEST_NAME,
770	"./" VBOX_EXTPACK_SIGNATURE_NAME,
771	NULL
772	};
773	char szError[RTPATH_MAX];
774	rc = RTManifestEqualsEx(hOurManifest, hTheirManifest, &s_apszIgnoreEntries[0], NULL,
775	RTMANIFEST_EQUALS_IGN_MISSING_ATTRS /fFlags/,
776	szError, sizeof(szError));
777	if (RT_SUCCESS(rc))
778	{
779	/*
780	* Validate the manifest file signature.
781	*/
782	/** @todo implement signature stuff */
783	NOREF(hSignatureFile);
784
785	}
786	else if (rc == VERR_NOT_EQUAL && szError[0])
787	vboxExtPackSetError(pszError, cbError, "Manifest mismatch: %s", szError);
788	else
789	vboxExtPackSetError(pszError, cbError, "RTManifestEqualsEx failed: %Rrc", rc);
790	#if 0
791	RTVFSIOSTREAM hVfsIosStdOut = NIL_RTVFSIOSTREAM;
792	RTVfsIoStrmFromStdHandle(RTHANDLESTD_OUTPUT, RTFILE_O_WRITE, true, &hVfsIosStdOut);
793	RTVfsIoStrmWrite(hVfsIosStdOut, "Our:\n", sizeof("Our:\n") - 1, true, NULL);
794	RTManifestWriteStandard(hOurManifest, hVfsIosStdOut);
795	RTVfsIoStrmWrite(hVfsIosStdOut, "Their:\n", sizeof("Their:\n") - 1, true, NULL);
796	RTManifestWriteStandard(hTheirManifest, hVfsIosStdOut);
797	#endif
798	}
799	else
800	vboxExtPackSetError(pszError, cbError, "Error parsing '%s': %Rrc", VBOX_EXTPACK_MANIFEST_NAME, rc);
801
802	RTManifestRelease(hTheirManifest);
803	return rc;
804	}
805
806
807	/**
808	* Verifies the file digest (if specified) and returns the SHA-256 of the file.
809	*
810	* @returns
811	* @param hFileManifest Manifest containing a SHA-256 digest of the file
812	* that was calculated as the file was processed.
813	* @param pszFileDigest SHA-256 digest of the file.
814	* @param pStrDigest Where to return the SHA-256 digest. Optional.
815	* @param pszError Where to write an error message on failure.
816	* @param cbError The size of the @a pszError buffer.
817	*/
818	static int vboxExtPackVerifyFileDigest(RTMANIFEST hFileManifest, const char *pszFileDigest,
819	RTCString pStrDigest, char pszError, size_t cbError)
820	{
821	/*
822	* Extract the SHA-256 entry for the extpack file.
823	*/
824	char szCalculatedDigest[RTSHA256_DIGEST_LEN + 1];
825	int rc = RTManifestEntryQueryAttr(hFileManifest, "extpack", NULL /no name/, RTMANIFEST_ATTR_SHA256,
826	szCalculatedDigest, sizeof(szCalculatedDigest), NULL);
827	if (RT_SUCCESS(rc))
828	{
829	/*
830	* Convert the two strings to binary form before comparing.
831	* We convert the calculated hash even if we don't have anything to
832	* compare with, just to validate it.
833	*/
834	uint8_t abCalculatedHash[RTSHA256_HASH_SIZE];
835	rc = RTSha256FromString(szCalculatedDigest, abCalculatedHash);
836	if (RT_SUCCESS(rc))
837	{
838	if ( pszFileDigest
839	&& *pszFileDigest != '\0')
840	{
841	uint8_t abFileHash[RTSHA256_HASH_SIZE];
842	rc = RTSha256FromString(pszFileDigest, abFileHash);
843	if (RT_SUCCESS(rc))
844	{
845	if (memcmp(abFileHash, abCalculatedHash, sizeof(abFileHash)))
846	{
847	vboxExtPackSetError(pszError, cbError, "The extension pack file has changed (SHA-256 mismatch)");
848	rc = VERR_NOT_EQUAL;
849	}
850	}
851	else
852	vboxExtPackSetError(pszError, cbError, "Bad SHA-256 '%s': %Rrc", szCalculatedDigest, rc);
853	}
854
855	/*
856	* Set the output hash on success.
857	*/
858	if (pStrDigest && RT_SUCCESS(rc))
859	{
860	try
861	{
862	*pStrDigest = szCalculatedDigest;
863	}
864	catch (std::bad_alloc)
865	{
866	rc = VERR_NO_MEMORY;
867	}
868	}
869	}
870	else
871	vboxExtPackSetError(pszError, cbError, "Bad SHA-256 '%s': %Rrc", szCalculatedDigest, rc);
872	}
873	else
874	vboxExtPackSetError(pszError, cbError, "RTManifestEntryGetAttr: %Rrc", rc);
875	return rc;
876	}
877
878
879
880	/**
881	* Validates a standard file.
882	*
883	* Generally all files are
884	*
885	* @returns VBox status code, failure message in @a pszError.
886	* @param pszAdjName The adjusted member name.
887	* @param enmType The VFS object type.
888	* @param phVfsObj The pointer to the VFS object handle variable.
889	* This is both input and output.
890	* @param phVfsFile Where to store the handle to the memorized
891	* file. This is NULL for license files.
892	* @param pszError Where to write an error message on failure.
893	* @param cbError The size of the @a pszError buffer.
894	*/
895	static int VBoxExtPackValidateStandardFile(const char *pszAdjName, RTVFSOBJTYPE enmType,
896	PRTVFSOBJ phVfsObj, PRTVFSFILE phVfsFile, char *pszError, size_t cbError)
897	{
898	int rc;
899
900	/*
901	* Make sure it's a file and that it isn't too large.
902	*/
903	if (phVfsFile && *phVfsFile != NIL_RTVFSFILE)
904	rc = vboxExtPackReturnError(VERR_DUPLICATE, pszError, cbError,
905	"There can only be one '%s'", pszAdjName);
906	else if (enmType != RTVFSOBJTYPE_IO_STREAM && enmType != RTVFSOBJTYPE_FILE)
907	rc = vboxExtPackReturnError(VERR_NOT_A_FILE, pszError, cbError,
908	"Standard member '%s' is not a file", pszAdjName);
909	else
910	{
911	RTFSOBJINFO ObjInfo;
912	rc = RTVfsObjQueryInfo(*phVfsObj, &ObjInfo, RTFSOBJATTRADD_NOTHING);
913	if (RT_SUCCESS(rc))
914	{
915	if (!RTFS_IS_FILE(ObjInfo.Attr.fMode))
916	rc = vboxExtPackReturnError(VERR_NOT_A_FILE, pszError, cbError,
917	"Standard member '%s' is not a file", pszAdjName);
918	else if (ObjInfo.cbObject >= _1M)
919	rc = vboxExtPackReturnError(VERR_OUT_OF_RANGE, pszError, cbError,
920	"Standard member '%s' is too large: %'RU64 bytes (max 1 MB)",
921	pszAdjName, (uint64_t)ObjInfo.cbObject);
922	else
923	{
924	/*
925	* Make an in memory copy of the stream and check that the file
926	* is UTF-8 clean.
927	*/
928	RTVFSIOSTREAM hVfsIos = RTVfsObjToIoStream(*phVfsObj);
929	RTVFSFILE hVfsFile;
930	rc = RTVfsMemorizeIoStreamAsFile(hVfsIos, RTFILE_O_READ, &hVfsFile);
931	if (RT_SUCCESS(rc))
932	{
933	rc = RTVfsIoStrmValidateUtf8Encoding(hVfsIos,
934	RTVFS_VALIDATE_UTF8_BY_RTC_3629 \| RTVFS_VALIDATE_UTF8_NO_NULL,
935	NULL);
936	if (RT_SUCCESS(rc))
937	{
938	/*
939	* Replace *phVfsObj with the memorized file.
940	*/
941	rc = RTVfsFileSeek(hVfsFile, 0, RTFILE_SEEK_BEGIN, NULL);
942	if (RT_SUCCESS(rc))
943	{
944	RTVfsObjRelease(*phVfsObj);
945	*phVfsObj = RTVfsObjFromFile(hVfsFile);
946	}
947	else
948	vboxExtPackSetError(pszError, cbError, "RTVfsFileSeek failed on '%s': %Rrc", pszAdjName, rc);
949	}
950
951	if (phVfsFile && RT_SUCCESS(rc))
952	*phVfsFile = hVfsFile;
953	else
954	RTVfsFileRelease(hVfsFile);
955	}
956	else
957	vboxExtPackSetError(pszError, cbError, "RTVfsMemorizeIoStreamAsFile failed on '%s': %Rrc", pszAdjName, rc);
958	RTVfsIoStrmRelease(hVfsIos);
959	}
960	}
961	else
962	vboxExtPackSetError(pszError, cbError, "RTVfsObjQueryInfo failed on '%s': %Rrc", pszAdjName, rc);
963	}
964	return rc;
965	}
966
967
968	/**
969	* Validates a name in an extension pack.
970	*
971	* We restrict the charset to try make sure the extension pack can be unpacked
972	* on all file systems.
973	*
974	* @returns VBox status code, failures with message.
975	* @param pszName The name to validate.
976	* @param pszError Where to store an error message on failure.
977	* @param cbError The size of the buffer @a pszError points to.
978	*/
979	static int vboxExtPackValidateMemberName(const char pszName, char pszError, size_t cbError)
980	{
981	if (RTPathStartsWithRoot(pszName))
982	return vboxExtPackReturnError(VERR_PATH_IS_NOT_RELATIVE, pszError, cbError, "'%s': starts with root spec", pszName);
983
984	const char *pszErr = NULL;
985	const char *psz = pszName;
986	int ch;
987	while ((ch = *psz) != '\0')
988	{
989	/* Character set restrictions. */
990	if (ch < 0 \|\| ch >= 128)
991	{
992	pszErr = "Only 7-bit ASCII allowed";
993	break;
994	}
995	if (ch <= 31 \|\| ch == 127)
996	{
997	pszErr = "No control characters are not allowed";
998	break;
999	}
1000	if (ch == '\\')
1001	{
1002	pszErr = "Only backward slashes are not allowed";
1003	break;
1004	}
1005	if (strchr("'\":;*?\|[]<>(){}", ch))
1006	{
1007	pszErr = "The characters ', \", :, ;, *, ?, \|, [, ], <, >, (, ), { and } are not allowed";
1008	break;
1009	}
1010
1011	/* Take the simple way out and ban all ".." sequences. */
1012	if ( ch == '.'
1013	&& psz[1] == '.')
1014	{
1015	pszErr = "Double dot sequence are not allowed";
1016	break;
1017	}
1018
1019	/* Keep the tree shallow or the hardening checks will fail. */
1020	if (psz - pszName > VBOX_EXTPACK_MAX_MEMBER_NAME_LENGTH)
1021	{
1022	pszErr = "Too long";
1023	break;
1024	}
1025
1026	/* advance */
1027	psz++;
1028	}
1029
1030	if (pszErr)
1031	return vboxExtPackReturnError(VERR_INVALID_NAME, pszError, cbError,
1032	"Bad member name '%s' (pos %zu): %s", pszName, (size_t)(psz - pszName), pszErr);
1033	return RTEXITCODE_SUCCESS;
1034	}
1035
1036
1037	/**
1038	* Validates a file in an extension pack.
1039	*
1040	* @returns VBox status code, failures with message.
1041	* @param pszName The name of the file.
1042	* @param hVfsObj The VFS object.
1043	* @param pszError Where to store an error message on failure.
1044	* @param cbError The size of the buffer @a pszError points to.
1045	*/
1046	static int vboxExtPackValidateMemberFile(const char pszName, RTVFSOBJ hVfsObj, char pszError, size_t cbError)
1047	{
1048	int rc = vboxExtPackValidateMemberName(pszName, pszError, cbError);
1049	if (RT_SUCCESS(rc))
1050	{
1051	RTFSOBJINFO ObjInfo;
1052	rc = RTVfsObjQueryInfo(hVfsObj, &ObjInfo, RTFSOBJATTRADD_NOTHING);
1053	if (RT_SUCCESS(rc))
1054	{
1055	if (ObjInfo.cbObject >= 9*_1G64)
1056	rc = vboxExtPackReturnError(VERR_OUT_OF_RANGE, pszError, cbError,
1057	"'%s': too large (%'RU64 bytes)",
1058	pszName, (uint64_t)ObjInfo.cbObject);
1059	if (!RTFS_IS_FILE(ObjInfo.Attr.fMode))
1060	rc = vboxExtPackReturnError(VERR_NOT_A_FILE, pszError, cbError,
1061	"The alleged file '%s' has a mode mask stating otherwise (%RTfmode)",
1062	pszName, ObjInfo.Attr.fMode);
1063	}
1064	else
1065	vboxExtPackSetError(pszError, cbError, "RTVfsObjQueryInfo failed on '%s': %Rrc", pszName, rc);
1066	}
1067	return rc;
1068	}
1069
1070
1071	/**
1072	* Validates a directory in an extension pack.
1073	*
1074	* @returns VBox status code, failures with message.
1075	* @param pszName The name of the directory.
1076	* @param hVfsObj The VFS object.
1077	* @param pszError Where to store an error message on failure.
1078	* @param cbError The size of the buffer @a pszError points to.
1079	*/
1080	static int vboxExtPackValidateMemberDir(const char pszName, RTVFSOBJ hVfsObj, char pszError, size_t cbError)
1081	{
1082	int rc = vboxExtPackValidateMemberName(pszName, pszError, cbError);
1083	if (RT_SUCCESS(rc))
1084	{
1085	RTFSOBJINFO ObjInfo;
1086	rc = RTVfsObjQueryInfo(hVfsObj, &ObjInfo, RTFSOBJATTRADD_NOTHING);
1087	if (RT_SUCCESS(rc))
1088	{
1089	if (!RTFS_IS_DIRECTORY(ObjInfo.Attr.fMode))
1090	rc = vboxExtPackReturnError(VERR_NOT_A_DIRECTORY, pszError, cbError,
1091	"The alleged directory '%s' has a mode mask saying differently (%RTfmode)",
1092	pszName, ObjInfo.Attr.fMode);
1093	}
1094	else
1095	vboxExtPackSetError(pszError, cbError, "RTVfsObjQueryInfo failed on '%s': %Rrc", pszName, rc);
1096	}
1097	return rc;
1098	}
1099
1100	/**
1101	* Validates a member of an extension pack.
1102	*
1103	* @returns VBox status code, failures with message.
1104	* @param pszName The name of the directory.
1105	* @param enmType The object type.
1106	* @param hVfsObj The VFS object.
1107	* @param pszError Where to store an error message on failure.
1108	* @param cbError The size of the buffer @a pszError points to.
1109	*/
1110	int VBoxExtPackValidateMember(const char pszName, RTVFSOBJTYPE enmType, RTVFSOBJ hVfsObj, char pszError, size_t cbError)
1111	{
1112	Assert(cbError > 0);
1113	*pszError = '\0';
1114
1115	int rc;
1116	if ( enmType == RTVFSOBJTYPE_FILE
1117	\|\| enmType == RTVFSOBJTYPE_IO_STREAM)
1118	rc = vboxExtPackValidateMemberFile(pszName, hVfsObj, pszError, cbError);
1119	else if ( enmType == RTVFSOBJTYPE_DIR
1120	\|\| enmType == RTVFSOBJTYPE_BASE)
1121	rc = vboxExtPackValidateMemberDir(pszName, hVfsObj, pszError, cbError);
1122	else
1123	rc = vboxExtPackReturnError(VERR_UNEXPECTED_FS_OBJ_TYPE, pszError, cbError,
1124	"'%s' is not a file or directory (enmType=%d)", pszName, enmType);
1125	return rc;
1126	}
1127
1128
1129	/**
1130	* Rewinds the tarball file handle and creates a gunzip \| tar chain that
1131	* results in a filesystem stream.
1132	*
1133	* @returns VBox status code, failures with message.
1134	* @param hTarballFile The handle to the tarball file.
1135	* @param pszError Where to store an error message on failure.
1136	* @param cbError The size of the buffer @a pszError points to.
1137	* @param phTarFss Where to return the filesystem stream handle.
1138	* @param phFileManifest Where to return a manifest where the tarball is
1139	* gettting hashed. The entry will be called
1140	* "extpack" and be ready when the file system
1141	* stream is at an end. Optional.
1142	*/
1143	int VBoxExtPackOpenTarFss(RTFILE hTarballFile, char *pszError, size_t cbError, PRTVFSFSSTREAM phTarFss,
1144	PRTMANIFEST phFileManifest)
1145	{
1146	Assert(cbError > 0);
1147	*pszError = '\0';
1148	*phTarFss = NIL_RTVFSFSSTREAM;
1149
1150	/*
1151	* Rewind the file and set up a VFS chain for it.
1152	*/
1153	int rc = RTFileSeek(hTarballFile, 0, RTFILE_SEEK_BEGIN, NULL);
1154	if (RT_FAILURE(rc))
1155	return vboxExtPackReturnError(rc, pszError, cbError, "Failed seeking to the start of the tarball: %Rrc", rc);
1156
1157	RTVFSIOSTREAM hTarballIos;
1158	rc = RTVfsIoStrmFromRTFile(hTarballFile, RTFILE_O_READ \| RTFILE_O_DENY_WRITE \| RTFILE_O_OPEN, true /fLeaveOpen/,
1159	&hTarballIos);
1160	if (RT_FAILURE(rc))
1161	return vboxExtPackReturnError(rc, pszError, cbError, "RTVfsIoStrmFromRTFile failed: %Rrc", rc);
1162
1163	RTMANIFEST hFileManifest = NIL_RTMANIFEST;
1164	rc = RTManifestCreate(0 /fFlags/, &hFileManifest);
1165	if (RT_SUCCESS(rc))
1166	{
1167	RTVFSIOSTREAM hPtIos;
1168	rc = RTManifestEntryAddPassthruIoStream(hFileManifest, hTarballIos, "extpack", RTMANIFEST_ATTR_SHA256,
1169	true /read/, &hPtIos);
1170	if (RT_SUCCESS(rc))
1171	{
1172	RTVFSIOSTREAM hGunzipIos;
1173	rc = RTZipGzipDecompressIoStream(hPtIos, 0 /fFlags/, &hGunzipIos);
1174	if (RT_SUCCESS(rc))
1175	{
1176	RTVFSFSSTREAM hTarFss;
1177	rc = RTZipTarFsStreamFromIoStream(hGunzipIos, 0 /fFlags/, &hTarFss);
1178	if (RT_SUCCESS(rc))
1179	{
1180	RTVfsIoStrmRelease(hPtIos);
1181	RTVfsIoStrmRelease(hGunzipIos);
1182	RTVfsIoStrmRelease(hTarballIos);
1183	*phTarFss = hTarFss;
1184	if (phFileManifest)
1185	*phFileManifest = hFileManifest;
1186	else
1187	RTManifestRelease(hFileManifest);
1188	return VINF_SUCCESS;
1189	}
1190
1191	vboxExtPackSetError(pszError, cbError, "RTZipTarFsStreamFromIoStream failed: %Rrc", rc);
1192	RTVfsIoStrmRelease(hGunzipIos);
1193	}
1194	else
1195	vboxExtPackSetError(pszError, cbError, "RTZipGzipDecompressIoStream failed: %Rrc", rc);
1196	RTVfsIoStrmRelease(hPtIos);
1197	}
1198	else
1199	vboxExtPackSetError(pszError, cbError, "RTManifestEntryAddPassthruIoStream failed: %Rrc", rc);
1200	RTManifestRelease(hFileManifest);
1201	}
1202	else
1203	vboxExtPackSetError(pszError, cbError, "RTManifestCreate failed: %Rrc", rc);
1204
1205	RTVfsIoStrmRelease(hTarballIos);
1206	return rc;
1207	}
1208
1209
1210	/**
1211	* Validates the extension pack tarball prior to unpacking.
1212	*
1213	* Operations performed:
1214	* - Mandatory files.
1215	* - Manifest check.
1216	* - Manifest seal check.
1217	* - XML check, match name.
1218	*
1219	* @returns VBox status code, failures with message.
1220	* @param hTarballFile The handle to open the @a pszTarball file.
1221	* @param pszExtPackName The name of the extension pack name. NULL if
1222	* the name is not fixed.
1223	* @param pszTarball The name of the tarball in case we have to
1224	* complain about something.
1225	* @param pszTarballDigest The SHA-256 digest of the tarball. Empty string
1226	* if no digest available.
1227	* @param pszError Where to store an error message on failure.
1228	* @param cbError The size of the buffer @a pszError points to.
1229	* @param phValidManifest Where to optionally return the handle to fully
1230	* validated the manifest for the extension pack.
1231	* This includes all files.
1232	* @param phXmlFile Where to optionally return the memorized XML
1233	* file.
1234	* @param pStrDigest Where to return the digest of the file.
1235	* Optional.
1236	*/
1237	int VBoxExtPackValidateTarball(RTFILE hTarballFile, const char *pszExtPackName,
1238	const char pszTarball, const char pszTarballDigest,
1239	char *pszError, size_t cbError,
1240	PRTMANIFEST phValidManifest, PRTVFSFILE phXmlFile, RTCString *pStrDigest)
1241	{
1242	/*
1243	* Clear return values.
1244	*/
1245	if (phValidManifest)
1246	*phValidManifest = NIL_RTMANIFEST;
1247	if (phXmlFile)
1248	*phXmlFile = NIL_RTVFSFILE;
1249	Assert(cbError > 1);
1250	*pszError = '\0';
1251	NOREF(pszTarball);
1252
1253	/*
1254	* Open the tar.gz filesystem stream and set up an manifest in-memory file.
1255	*/
1256	RTMANIFEST hFileManifest;
1257	RTVFSFSSTREAM hTarFss;
1258	int rc = VBoxExtPackOpenTarFss(hTarballFile, pszError, cbError, &hTarFss, &hFileManifest);
1259	if (RT_FAILURE(rc))
1260	return rc;
1261
1262	RTMANIFEST hOurManifest;
1263	rc = RTManifestCreate(0 /fFlags/, &hOurManifest);
1264	if (RT_SUCCESS(rc))
1265	{
1266	/*
1267	* Process the tarball (would be nice to move this to a function).
1268	*/
1269	RTVFSFILE hXmlFile = NIL_RTVFSFILE;
1270	RTVFSFILE hManifestFile = NIL_RTVFSFILE;
1271	RTVFSFILE hSignatureFile = NIL_RTVFSFILE;
1272	for (;;)
1273	{
1274	/*
1275	* Get the next stream object.
1276	*/
1277	char *pszName;
1278	RTVFSOBJ hVfsObj;
1279	RTVFSOBJTYPE enmType;
1280	rc = RTVfsFsStrmNext(hTarFss, &pszName, &enmType, &hVfsObj);
1281	if (RT_FAILURE(rc))
1282	{
1283	if (rc != VERR_EOF)
1284	vboxExtPackSetError(pszError, cbError, "RTVfsFsStrmNext failed: %Rrc", rc);
1285	else
1286	rc = VINF_SUCCESS;
1287	break;
1288	}
1289	const char *pszAdjName = pszName[0] == '.' && pszName[1] == '/' ? &pszName[2] : pszName;
1290
1291	/*
1292	* Check the type & name validity, performing special tests on
1293	* standard extension pack member files.
1294	*
1295	* N.B. We will always reach the end of the loop before breaking on
1296	* failure - cleanup reasons.
1297	*/
1298	rc = VBoxExtPackValidateMember(pszName, enmType, hVfsObj, pszError, cbError);
1299	if (RT_SUCCESS(rc))
1300	{
1301	PRTVFSFILE phVfsFile = NULL;
1302	if (!strcmp(pszAdjName, VBOX_EXTPACK_DESCRIPTION_NAME))
1303	phVfsFile = &hXmlFile;
1304	else if (!strcmp(pszAdjName, VBOX_EXTPACK_MANIFEST_NAME))
1305	phVfsFile = &hManifestFile;
1306	else if (!strcmp(pszAdjName, VBOX_EXTPACK_SIGNATURE_NAME))
1307	phVfsFile = &hSignatureFile;
1308	else if (!strncmp(pszAdjName, VBOX_EXTPACK_LICENSE_NAME_PREFIX, sizeof(VBOX_EXTPACK_LICENSE_NAME_PREFIX) - 1))
1309	rc = VBoxExtPackValidateStandardFile(pszAdjName, enmType, &hVfsObj, NULL, pszError, cbError);
1310	if (phVfsFile)
1311	rc = VBoxExtPackValidateStandardFile(pszAdjName, enmType, &hVfsObj, phVfsFile, pszError, cbError);
1312	}
1313
1314	/*
1315	* Add any I/O stream to the manifest
1316	*/
1317	if ( RT_SUCCESS(rc)
1318	&& ( enmType == RTVFSOBJTYPE_FILE
1319	\|\| enmType == RTVFSOBJTYPE_IO_STREAM))
1320	{
1321	RTVFSIOSTREAM hVfsIos = RTVfsObjToIoStream(hVfsObj);
1322	rc = RTManifestEntryAddIoStream(hOurManifest, hVfsIos, pszAdjName, RTMANIFEST_ATTR_SIZE \| RTMANIFEST_ATTR_SHA256);
1323	if (RT_FAILURE(rc))
1324	vboxExtPackSetError(pszError, cbError, "RTManifestEntryAddIoStream failed on '%s': %Rrc", pszAdjName, rc);
1325	RTVfsIoStrmRelease(hVfsIos);
1326	}
1327
1328	/*
1329	* Clean up and break out on failure.
1330	*/
1331	RTVfsObjRelease(hVfsObj);
1332	RTStrFree(pszName);
1333	if (RT_FAILURE(rc))
1334	break;
1335	}
1336
1337	/*
1338	* Check the integrity of the tarball file.
1339	*/
1340	if (RT_SUCCESS(rc))
1341	{
1342	RTVfsFsStrmRelease(hTarFss);
1343	hTarFss = NIL_RTVFSFSSTREAM;
1344	rc = vboxExtPackVerifyFileDigest(hFileManifest, pszTarballDigest, pStrDigest, pszError, cbError);
1345	}
1346
1347	/*
1348	* If we've successfully processed the tarball, verify that the
1349	* mandatory files are present.
1350	*/
1351	if (RT_SUCCESS(rc))
1352	{
1353	if (hXmlFile == NIL_RTVFSFILE)
1354	rc = vboxExtPackReturnError(VERR_MISSING, pszError, cbError, "Mandator file '%s' is missing",
1355	VBOX_EXTPACK_DESCRIPTION_NAME);
1356	if (hManifestFile == NIL_RTVFSFILE)
1357	rc = vboxExtPackReturnError(VERR_MISSING, pszError, cbError, "Mandator file '%s' is missing",
1358	VBOX_EXTPACK_MANIFEST_NAME);
1359	if (hSignatureFile == NIL_RTVFSFILE)
1360	rc = vboxExtPackReturnError(VERR_MISSING, pszError, cbError, "Mandator file '%s' is missing",
1361	VBOX_EXTPACK_SIGNATURE_NAME);
1362	}
1363
1364	/*
1365	* Check the manifest and it's signature.
1366	*/
1367	if (RT_SUCCESS(rc))
1368	rc = vboxExtPackVerifyManifestAndSignature(hOurManifest, hManifestFile, hSignatureFile, pszError, cbError);
1369
1370	/*
1371	* Check the XML.
1372	*/
1373	if (RT_SUCCESS(rc))
1374	rc = vboxExtPackVerifyXml(hXmlFile, pszExtPackName, pszError, cbError);
1375
1376	/*
1377	* Returns objects.
1378	*/
1379	if (RT_SUCCESS(rc))
1380	{
1381	if (phValidManifest)
1382	{
1383	RTManifestRetain(hOurManifest);
1384	*phValidManifest = hOurManifest;
1385	}
1386	if (phXmlFile)
1387	{
1388	RTVfsFileRetain(hXmlFile);
1389	*phXmlFile = hXmlFile;
1390	}
1391	}
1392
1393	/*
1394	* Release our object references.
1395	*/
1396	RTManifestRelease(hOurManifest);
1397	RTVfsFileRelease(hXmlFile);
1398	RTVfsFileRelease(hManifestFile);
1399	RTVfsFileRelease(hSignatureFile);
1400	}
1401	else
1402	vboxExtPackSetError(pszError, cbError, "RTManifestCreate failed: %Rrc", rc);
1403	RTVfsFsStrmRelease(hTarFss);
1404	RTManifestRelease(hFileManifest);
1405
1406	return rc;
1407	}
1408

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source: vbox/trunk/src/VBox/Main/src-all/ExtPackUtil.cpp@ 72168

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