ExtPackUtil.cpp@ 85233

Last change on this file since 85233 was 85233, checked in by vboxsync, 4 years ago
Main/ExtPackUtil.cpp: Fixed a error string construction bug in VBoxExtPackLoadDesc, simplified the others. bugref:9790
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File size: 50.0 KB

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1	/* $Id: ExtPackUtil.cpp 85233 2020-07-11 16:30:55Z vboxsync $ */
2	/** @file
3	* VirtualBox Main - Extension Pack Utilities and definitions, VBoxC, VBoxSVC, ++.
4	*/
5
6	/*
7	* Copyright (C) 2010-2020 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/err.h>
27	#include <iprt/file.h>
28	#include <iprt/manifest.h>
29	#include <iprt/param.h>
30	#include <iprt/path.h>
31	#include <iprt/sha.h>
32	#include <iprt/string.h>
33	#include <iprt/vfs.h>
34	#include <iprt/tar.h>
35	#include <iprt/zip.h>
36	#include <iprt/cpp/xml.h>
37
38	#include <VBox/log.h>
39
40
41	/**
42	* Worker for VBoxExtPackLoadDesc that loads the plug-in descriptors.
43	*
44	* @returns Same as VBoxExtPackLoadDesc.
45	* @param pVBoxExtPackElm
46	* @param pcPlugIns Where to return the number of plug-ins in the
47	* array.
48	* @param paPlugIns Where to return the plug-in descriptor array.
49	* (RTMemFree it even on failure)
50	*/
51	static RTCString *
52	vboxExtPackLoadPlugInDescs(const xml::ElementNode *pVBoxExtPackElm,
53	uint32_t pcPlugIns, PVBOXEXTPACKPLUGINDESC paPlugIns)
54	{
55	*pcPlugIns = 0;
56	*paPlugIns = NULL;
57
58	/** @todo plug-ins */
59	NOREF(pVBoxExtPackElm);
60
61	return NULL;
62	}
63
64	/**
65	* Clears the extension pack descriptor.
66	*
67	* @param a_pExtPackDesc The descriptor to clear.
68	*/
69	static void vboxExtPackClearDesc(PVBOXEXTPACKDESC a_pExtPackDesc)
70	{
71	a_pExtPackDesc->strName.setNull();
72	a_pExtPackDesc->strDescription.setNull();
73	a_pExtPackDesc->strVersion.setNull();
74	a_pExtPackDesc->strEdition.setNull();
75	a_pExtPackDesc->uRevision = 0;
76	a_pExtPackDesc->strMainModule.setNull();
77	a_pExtPackDesc->strMainVMModule.setNull();
78	a_pExtPackDesc->strVrdeModule.setNull();
79	a_pExtPackDesc->cPlugIns = 0;
80	a_pExtPackDesc->paPlugIns = NULL;
81	a_pExtPackDesc->fShowLicense = false;
82	}
83
84	/**
85	* Initializes an extension pack descriptor so that it's safe to call free on
86	* it whatever happens later on.
87	*
88	* @param a_pExtPackDesc The descirptor to initialize.
89	*/
90	void VBoxExtPackInitDesc(PVBOXEXTPACKDESC a_pExtPackDesc)
91	{
92	vboxExtPackClearDesc(a_pExtPackDesc);
93	}
94
95
96	/**
97	* Load the extension pack descriptor from an XML document.
98	*
99	* @returns NULL on success, pointer to an error message on failure (caller
100	* deletes it).
101	* @param a_pDoc Pointer to the XML document.
102	* @param a_pExtPackDesc Where to store the extension pack descriptor.
103	*/
104	static RTCString vboxExtPackLoadDescFromDoc(xml::Document a_pDoc, PVBOXEXTPACKDESC a_pExtPackDesc)
105	{
106	/*
107	* Get the main element and check its version.
108	*/
109	const xml::ElementNode *pVBoxExtPackElm = a_pDoc->getRootElement();
110	if ( !pVBoxExtPackElm
111	\|\| strcmp(pVBoxExtPackElm->getName(), "VirtualBoxExtensionPack") != 0)
112	return new RTCString("No VirtualBoxExtensionPack element");
113
114	RTCString strFormatVersion;
115	if (!pVBoxExtPackElm->getAttributeValueN("version", strFormatVersion, RT_XML_ATTR_TINY))
116	return new RTCString("Missing format version");
117	if (!strFormatVersion.equals("1.0"))
118	return &(new RTCString("Unsupported format version: "))->append(strFormatVersion);
119
120	/*
121	* Read and validate mandatory bits.
122	*/
123	const xml::ElementNode *pNameElm = pVBoxExtPackElm->findChildElement("Name");
124	if (!pNameElm)
125	return new RTCString("The 'Name' element is missing");
126	const char *pszName = pNameElm->getValueN(RT_XML_CONTENT_SMALL);
127	if (!VBoxExtPackIsValidName(pszName))
128	return &(new RTCString("Invalid name: "))->append(pszName);
129
130	const xml::ElementNode *pDescElm = pVBoxExtPackElm->findChildElement("Description");
131	if (!pDescElm)
132	return new RTCString("The 'Description' element is missing");
133	const char *pszDesc = pDescElm->getValueN(RT_XML_CONTENT_LARGE);
134	if (!pszDesc \|\| *pszDesc == '\0')
135	return new RTCString("The 'Description' element is empty");
136	if (strpbrk(pszDesc, "\n\r\t\v\b") != NULL)
137	return new RTCString("The 'Description' must not contain control characters");
138
139	const xml::ElementNode *pVersionElm = pVBoxExtPackElm->findChildElement("Version");
140	if (!pVersionElm)
141	return new RTCString("The 'Version' element is missing");
142	const char *pszVersion = pVersionElm->getValueN(RT_XML_CONTENT_SMALL);
143	if (!pszVersion \|\| *pszVersion == '\0')
144	return new RTCString("The 'Version' element is empty");
145	if (!VBoxExtPackIsValidVersionString(pszVersion))
146	return &(new RTCString("Invalid version string: "))->append(pszVersion);
147
148	uint32_t uRevision;
149	if (!pVersionElm->getAttributeValue("revision", uRevision))
150	uRevision = 0;
151
152	const char *pszEdition;
153	if (!pVersionElm->getAttributeValueN("edition", pszEdition, RT_XML_ATTR_TINY))
154	pszEdition = "";
155	if (!VBoxExtPackIsValidEditionString(pszEdition))
156	return &(new RTCString("Invalid edition string: "))->append(pszEdition);
157
158	const xml::ElementNode *pMainModuleElm = pVBoxExtPackElm->findChildElement("MainModule");
159	if (!pMainModuleElm)
160	return new RTCString("The 'MainModule' element is missing");
161	const char *pszMainModule = pMainModuleElm->getValueN(RT_XML_CONTENT_SMALL);
162	if (!pszMainModule \|\| *pszMainModule == '\0')
163	return new RTCString("The 'MainModule' element is empty");
164	if (!VBoxExtPackIsValidModuleString(pszMainModule))
165	return &(new RTCString("Invalid main module string: "))->append(pszMainModule);
166
167	/*
168	* The main VM module, optional.
169	* Accept both none and empty as tokens of no main VM module.
170	*/
171	const char *pszMainVMModule = NULL;
172	const xml::ElementNode *pMainVMModuleElm = pVBoxExtPackElm->findChildElement("MainVMModule");
173	if (pMainVMModuleElm)
174	{
175	pszMainVMModule = pMainVMModuleElm->getValueN(RT_XML_CONTENT_SMALL);
176	if (!pszMainVMModule \|\| *pszMainVMModule == '\0')
177	pszMainVMModule = NULL;
178	else if (!VBoxExtPackIsValidModuleString(pszMainVMModule))
179	return &(new RTCString("Invalid main VM module string: "))->append(pszMainVMModule);
180	}
181
182	/*
183	* The VRDE module, optional.
184	* Accept both none and empty as tokens of no VRDE module.
185	*/
186	const char *pszVrdeModule = NULL;
187	const xml::ElementNode *pVrdeModuleElm = pVBoxExtPackElm->findChildElement("VRDEModule");
188	if (pVrdeModuleElm)
189	{
190	pszVrdeModule = pVrdeModuleElm->getValueN(RT_XML_CONTENT_SMALL);
191	if (!pszVrdeModule \|\| *pszVrdeModule == '\0')
192	pszVrdeModule = NULL;
193	else if (!VBoxExtPackIsValidModuleString(pszVrdeModule))
194	return &(new RTCString("Invalid VRDE module string: "))->append(pszVrdeModule);
195	}
196
197	/*
198	* Whether to show the license, optional. (presense is enough here)
199	*/
200	const xml::ElementNode *pShowLicenseElm = pVBoxExtPackElm->findChildElement("ShowLicense");
201	bool fShowLicense = pShowLicenseElm != NULL;
202
203	/*
204	* Parse plug-in descriptions (last because of the manual memory management).
205	*/
206	uint32_t cPlugIns = 0;
207	PVBOXEXTPACKPLUGINDESC paPlugIns = NULL;
208	RTCString *pstrRet = vboxExtPackLoadPlugInDescs(pVBoxExtPackElm, &cPlugIns, &paPlugIns);
209	if (pstrRet)
210	{
211	RTMemFree(paPlugIns);
212	return pstrRet;
213	}
214
215	/*
216	* Everything seems fine, fill in the return values and return successfully.
217	*/
218	a_pExtPackDesc->strName = pszName;
219	a_pExtPackDesc->strDescription = pszDesc;
220	a_pExtPackDesc->strVersion = pszVersion;
221	a_pExtPackDesc->strEdition = pszEdition;
222	a_pExtPackDesc->uRevision = uRevision;
223	a_pExtPackDesc->strMainModule = pszMainModule;
224	a_pExtPackDesc->strMainVMModule = pszMainVMModule;
225	a_pExtPackDesc->strVrdeModule = pszVrdeModule;
226	a_pExtPackDesc->cPlugIns = cPlugIns;
227	a_pExtPackDesc->paPlugIns = paPlugIns;
228	a_pExtPackDesc->fShowLicense = fShowLicense;
229
230	return NULL;
231	}
232
233	/**
234	* Reads the extension pack descriptor.
235	*
236	* @returns NULL on success, pointer to an error message on failure (caller
237	* deletes it).
238	* @param a_pszDir The directory containing the description file.
239	* @param a_pExtPackDesc Where to store the extension pack descriptor.
240	* @param a_pObjInfo Where to store the object info for the file (unix
241	* attribs). Optional.
242	*/
243	RTCString VBoxExtPackLoadDesc(const char a_pszDir, PVBOXEXTPACKDESC a_pExtPackDesc, PRTFSOBJINFO a_pObjInfo)
244	{
245	vboxExtPackClearDesc(a_pExtPackDesc);
246
247	/*
248	* Validate, open and parse the XML file.
249	*/
250	char szFilePath[RTPATH_MAX];
251	int vrc = RTPathJoin(szFilePath, sizeof(szFilePath), a_pszDir, VBOX_EXTPACK_DESCRIPTION_NAME);
252	if (RT_FAILURE(vrc))
253	return new RTCStringFmt("RTPathJoin failed with %Rrc", vrc);
254
255	RTFSOBJINFO ObjInfo;
256	vrc = RTPathQueryInfoEx(szFilePath, &ObjInfo, RTFSOBJATTRADD_UNIX, RTPATH_F_ON_LINK);
257	if (RT_FAILURE(vrc))
258	return new RTCStringFmt("RTPathQueryInfoEx failed with %Rrc", vrc);
259	if (a_pObjInfo)
260	*a_pObjInfo = ObjInfo;
261	if (!RTFS_IS_FILE(ObjInfo.Attr.fMode))
262	{
263	if (RTFS_IS_SYMLINK(ObjInfo.Attr.fMode))
264	return new RTCString("The XML file is symlinked, that is not allowed");
265	return new RTCStringFmt("The XML file is not a file (fMode=%#x)", ObjInfo.Attr.fMode);
266	}
267
268	xml::Document Doc;
269	{
270	xml::XmlFileParser Parser;
271	try
272	{
273	Parser.read(szFilePath, Doc);
274	}
275	catch (xml::XmlError &rErr)
276	{
277	return new RTCString(rErr.what());
278	}
279	}
280
281	/*
282	* Hand the xml doc over to the common code.
283	*/
284	try
285	{
286	return vboxExtPackLoadDescFromDoc(&Doc, a_pExtPackDesc);
287	}
288	catch (RTCError &rXcpt) // includes all XML exceptions
289	{
290	return new RTCString(rXcpt.what());
291	}
292	}
293
294	/**
295	* Reads the extension pack descriptor.
296	*
297	* @returns NULL on success, pointer to an error message on failure (caller
298	* deletes it).
299	* @param hVfsFile The file handle of the description file.
300	* @param a_pExtPackDesc Where to store the extension pack descriptor.
301	* @param a_pObjInfo Where to store the object info for the file (unix
302	* attribs). Optional.
303	*/
304	RTCString *VBoxExtPackLoadDescFromVfsFile(RTVFSFILE hVfsFile, PVBOXEXTPACKDESC a_pExtPackDesc, PRTFSOBJINFO a_pObjInfo)
305	{
306	vboxExtPackClearDesc(a_pExtPackDesc);
307
308	/*
309	* Query the object info.
310	*/
311	RTFSOBJINFO ObjInfo;
312	int rc = RTVfsFileQueryInfo(hVfsFile, &ObjInfo, RTFSOBJATTRADD_UNIX);
313	if (RT_FAILURE(rc))
314	return &(new RTCString)->printf("RTVfsFileQueryInfo failed: %Rrc", rc);
315	if (a_pObjInfo)
316	*a_pObjInfo = ObjInfo;
317
318	/*
319	* The simple approach, read the whole thing into memory and pass this to
320	* the XML parser.
321	*/
322
323	/* Check the file size. */
324	if (ObjInfo.cbObject > _1M \|\| ObjInfo.cbObject < 0)
325	return &(new RTCString)->printf("The XML file is too large (%'RU64 bytes)", ObjInfo.cbObject);
326	size_t const cbFile = (size_t)ObjInfo.cbObject;
327
328	/* Rewind to the start of the file. */
329	rc = RTVfsFileSeek(hVfsFile, 0, RTFILE_SEEK_BEGIN, NULL);
330	if (RT_FAILURE(rc))
331	return &(new RTCString)->printf("RTVfsFileSeek(,0,BEGIN) failed: %Rrc", rc);
332
333	/* Allocate memory and read the file content into it. */
334	void *pvFile = RTMemTmpAlloc(cbFile);
335	if (!pvFile)
336	return &(new RTCString)->printf("RTMemTmpAlloc(%zu) failed", cbFile);
337
338	RTCString *pstrErr = NULL;
339	rc = RTVfsFileRead(hVfsFile, pvFile, cbFile, NULL);
340	if (RT_FAILURE(rc))
341	pstrErr = &(new RTCString)->printf("RTVfsFileRead failed: %Rrc", rc);
342
343	/*
344	* Parse the file.
345	*/
346	xml::Document Doc;
347	if (RT_SUCCESS(rc))
348	{
349	xml::XmlMemParser Parser;
350	RTCString strFileName = VBOX_EXTPACK_DESCRIPTION_NAME;
351	try
352	{
353	Parser.read(pvFile, cbFile, strFileName, Doc);
354	}
355	catch (xml::XmlError &rErr)
356	{
357	pstrErr = new RTCString(rErr.what());
358	rc = VERR_PARSE_ERROR;
359	}
360	}
361	RTMemTmpFree(pvFile);
362
363	/*
364	* Hand the xml doc over to the common code.
365	*/
366	if (RT_SUCCESS(rc))
367	try
368	{
369	pstrErr = vboxExtPackLoadDescFromDoc(&Doc, a_pExtPackDesc);
370	}
371	catch (RTCError &rXcpt) // includes all XML exceptions
372	{
373	return new RTCString(rXcpt.what());
374	}
375
376	return pstrErr;
377	}
378
379	/**
380	* Frees all resources associated with a extension pack descriptor.
381	*
382	* @param a_pExtPackDesc The extension pack descriptor which members
383	* should be freed.
384	*/
385	void VBoxExtPackFreeDesc(PVBOXEXTPACKDESC a_pExtPackDesc)
386	{
387	if (!a_pExtPackDesc)
388	return;
389
390	a_pExtPackDesc->strName.setNull();
391	a_pExtPackDesc->strDescription.setNull();
392	a_pExtPackDesc->strVersion.setNull();
393	a_pExtPackDesc->strEdition.setNull();
394	a_pExtPackDesc->uRevision = 0;
395	a_pExtPackDesc->strMainModule.setNull();
396	a_pExtPackDesc->strMainVMModule.setNull();
397	a_pExtPackDesc->strVrdeModule.setNull();
398	a_pExtPackDesc->cPlugIns = 0;
399	RTMemFree(a_pExtPackDesc->paPlugIns);
400	a_pExtPackDesc->paPlugIns = NULL;
401	a_pExtPackDesc->fShowLicense = false;
402	}
403
404	/**
405	* Extract the extension pack name from the tarball path.
406	*
407	* @returns String containing the name on success, the caller must delete it.
408	* NULL if no valid name was found or if we ran out of memory.
409	* @param pszTarball The path to the tarball.
410	*/
411	RTCString VBoxExtPackExtractNameFromTarballPath(const char pszTarball)
412	{
413	/*
414	* Skip ahead to the filename part and count the number of characters
415	* that matches the criteria for a mangled extension pack name.
416	*/
417	const char *pszSrc = RTPathFilename(pszTarball);
418	if (!pszSrc)
419	return NULL;
420
421	size_t off = 0;
422	while (RT_C_IS_ALNUM(pszSrc[off]) \|\| pszSrc[off] == '_')
423	off++;
424
425	/*
426	* Check min and max name limits.
427	*/
428	if ( off > VBOX_EXTPACK_NAME_MAX_LEN
429	\|\| off < VBOX_EXTPACK_NAME_MIN_LEN)
430	return NULL;
431
432	/*
433	* Return the unmangled name.
434	*/
435	return VBoxExtPackUnmangleName(pszSrc, off);
436	}
437
438	/**
439	* Validates the extension pack name.
440	*
441	* @returns true if valid, false if not.
442	* @param pszName The name to validate.
443	* @sa VBoxExtPackExtractNameFromTarballPath
444	*/
445	bool VBoxExtPackIsValidName(const char *pszName)
446	{
447	if (!pszName)
448	return false;
449
450	/*
451	* Check the characters making up the name, only english alphabet
452	* characters, decimal digits and spaces are allowed.
453	*/
454	size_t off = 0;
455	while (pszName[off])
456	{
457	if (!RT_C_IS_ALNUM(pszName[off]) && pszName[off] != ' ')
458	return false;
459	off++;
460	}
461
462	/*
463	* Check min and max name limits.
464	*/
465	if ( off > VBOX_EXTPACK_NAME_MAX_LEN
466	\|\| off < VBOX_EXTPACK_NAME_MIN_LEN)
467	return false;
468
469	return true;
470	}
471
472	/**
473	* Checks if an alledged manged extension pack name.
474	*
475	* @returns true if valid, false if not.
476	* @param pszMangledName The mangled name to validate.
477	* @param cchMax The max number of chars to test.
478	* @sa VBoxExtPackMangleName
479	*/
480	bool VBoxExtPackIsValidMangledName(const char pszMangledName, size_t cchMax /= RTSTR_MAX*/)
481	{
482	if (!pszMangledName)
483	return false;
484
485	/*
486	* Check the characters making up the name, only english alphabet
487	* characters, decimal digits and underscores (=space) are allowed.
488	*/
489	size_t off = 0;
490	while (off < cchMax && pszMangledName[off])
491	{
492	if (!RT_C_IS_ALNUM(pszMangledName[off]) && pszMangledName[off] != '_')
493	return false;
494	off++;
495	}
496
497	/*
498	* Check min and max name limits.
499	*/
500	if ( off > VBOX_EXTPACK_NAME_MAX_LEN
501	\|\| off < VBOX_EXTPACK_NAME_MIN_LEN)
502	return false;
503
504	return true;
505	}
506
507	/**
508	* Mangle an extension pack name so it can be used by a directory or file name.
509	*
510	* @returns String containing the mangled name on success, the caller must
511	* delete it. NULL on failure.
512	* @param pszName The unmangled name.
513	* @sa VBoxExtPackUnmangleName, VBoxExtPackIsValidMangledName
514	*/
515	RTCString VBoxExtPackMangleName(const char pszName)
516	{
517	AssertReturn(VBoxExtPackIsValidName(pszName), NULL);
518
519	char szTmp[VBOX_EXTPACK_NAME_MAX_LEN + 1];
520	size_t off = 0;
521	char ch;
522	while ((ch = pszName[off]) != '\0')
523	{
524	if (ch == ' ')
525	ch = '_';
526	szTmp[off++] = ch;
527	}
528	szTmp[off] = '\0';
529	Assert(VBoxExtPackIsValidMangledName(szTmp));
530
531	return new RTCString(szTmp, off);
532	}
533
534	/**
535	* Unmangle an extension pack name (reverses VBoxExtPackMangleName).
536	*
537	* @returns String containing the mangled name on success, the caller must
538	* delete it. NULL on failure.
539	* @param pszMangledName The mangled name.
540	* @param cchMax The max name length. RTSTR_MAX is fine.
541	* @sa VBoxExtPackMangleName, VBoxExtPackIsValidMangledName
542	*/
543	RTCString VBoxExtPackUnmangleName(const char pszMangledName, size_t cchMax)
544	{
545	AssertReturn(VBoxExtPackIsValidMangledName(pszMangledName, cchMax), NULL);
546
547	char szTmp[VBOX_EXTPACK_NAME_MAX_LEN + 1];
548	size_t off = 0;
549	char ch;
550	while ( off < cchMax
551	&& (ch = pszMangledName[off]) != '\0')
552	{
553	if (ch == '_')
554	ch = ' ';
555	else
556	AssertReturn(RT_C_IS_ALNUM(ch) \|\| ch == ' ', NULL);
557	szTmp[off++] = ch;
558	}
559	szTmp[off] = '\0';
560	AssertReturn(VBoxExtPackIsValidName(szTmp), NULL);
561
562	return new RTCString(szTmp, off);
563	}
564
565	/**
566	* Constructs the extension pack directory path.
567	*
568	* A combination of RTPathJoin and VBoxExtPackMangleName.
569	*
570	* @returns IPRT status code like RTPathJoin.
571	* @param pszExtPackDir Where to return the directory path.
572	* @param cbExtPackDir The size of the return buffer.
573	* @param pszParentDir The parent directory (".../Extensions").
574	* @param pszName The extension pack name, unmangled.
575	*/
576	int VBoxExtPackCalcDir(char pszExtPackDir, size_t cbExtPackDir, const char pszParentDir, const char *pszName)
577	{
578	AssertReturn(VBoxExtPackIsValidName(pszName), VERR_INTERNAL_ERROR_5);
579
580	RTCString *pstrMangledName = VBoxExtPackMangleName(pszName);
581	if (!pstrMangledName)
582	return VERR_INTERNAL_ERROR_4;
583
584	int vrc = RTPathJoin(pszExtPackDir, cbExtPackDir, pszParentDir, pstrMangledName->c_str());
585	delete pstrMangledName;
586
587	return vrc;
588	}
589
590
591	/**
592	* Validates the extension pack version string.
593	*
594	* @returns true if valid, false if not.
595	* @param pszVersion The version string to validate.
596	*/
597	bool VBoxExtPackIsValidVersionString(const char *pszVersion)
598	{
599	if (!pszVersion \|\| *pszVersion == '\0')
600	return false;
601
602	/* 1.x.y.z... */
603	for (;;)
604	{
605	if (!RT_C_IS_DIGIT(*pszVersion))
606	return false;
607	do
608	pszVersion++;
609	while (RT_C_IS_DIGIT(*pszVersion));
610	if (*pszVersion != '.')
611	break;
612	pszVersion++;
613	}
614
615	/* upper case string + numbers indicating the build type */
616	if (pszVersion == '-' \|\| pszVersion == '_')
617	{
618	/** @todo Should probably restrict this to known build types (alpha,
619	* beta, rc, ++). */
620	do
621	pszVersion++;
622	while ( RT_C_IS_DIGIT(*pszVersion)
623	\|\| RT_C_IS_UPPER(*pszVersion)
624	\|\| *pszVersion == '-'
625	\|\| *pszVersion == '_');
626	}
627
628	return *pszVersion == '\0';
629	}
630
631	/**
632	* Validates the extension pack edition string.
633	*
634	* @returns true if valid, false if not.
635	* @param pszEdition The edition string to validate.
636	*/
637	bool VBoxExtPackIsValidEditionString(const char *pszEdition)
638	{
639	if (*pszEdition)
640	{
641	if (!RT_C_IS_UPPER(*pszEdition))
642	return false;
643
644	do
645	pszEdition++;
646	while ( RT_C_IS_UPPER(*pszEdition)
647	\|\| RT_C_IS_DIGIT(*pszEdition)
648	\|\| *pszEdition == '-'
649	\|\| *pszEdition == '_');
650	}
651	return *pszEdition == '\0';
652	}
653
654	/**
655	* Validates an extension pack module string.
656	*
657	* @returns true if valid, false if not.
658	* @param pszModule The module string to validate.
659	*/
660	bool VBoxExtPackIsValidModuleString(const char *pszModule)
661	{
662	if (!pszModule \|\| *pszModule == '\0')
663	return false;
664
665	/* Restricted charset, no extensions (dots). */
666	while ( RT_C_IS_ALNUM(*pszModule)
667	\|\| *pszModule == '-'
668	\|\| *pszModule == '_')
669	pszModule++;
670
671	return *pszModule == '\0';
672	}
673
674	/**
675	* RTStrPrintfv wrapper.
676	*
677	* @returns @a rc
678	* @param rc The status code to return.
679	* @param pszError The error buffer.
680	* @param cbError The size of the buffer.
681	* @param pszFormat The error message format string.
682	* @param ... Format arguments.
683	*/
684	static int vboxExtPackReturnError(int rc, char pszError, size_t cbError, const char pszFormat, ...)
685	{
686	va_list va;
687	va_start(va, pszFormat);
688	RTStrPrintfV(pszError, cbError, pszFormat, va);
689	va_end(va);
690	return rc;
691	}
692
693	/**
694	* RTStrPrintfv wrapper.
695	*
696	* @param pszError The error buffer.
697	* @param cbError The size of the buffer.
698	* @param pszFormat The error message format string.
699	* @param ... Format arguments.
700	*/
701	static void vboxExtPackSetError(char pszError, size_t cbError, const char pszFormat, ...)
702	{
703	va_list va;
704	va_start(va, pszFormat);
705	RTStrPrintfV(pszError, cbError, pszFormat, va);
706	va_end(va);
707	}
708
709	/**
710	* Verifies the manifest and its signature.
711	*
712	* @returns VBox status code, failures with message.
713	* @param hXmlFile The xml from the extension pack.
714	* @param pszExtPackName The expected extension pack name. This can be
715	* NULL, in which we don't have any expectations.
716	* @param pszError Where to store an error message on failure.
717	* @param cbError The size of the buffer @a pszError points to.
718	*/
719	static int vboxExtPackVerifyXml(RTVFSFILE hXmlFile, const char pszExtPackName, char pszError, size_t cbError)
720	{
721	/*
722	* Load the XML.
723	*/
724	VBOXEXTPACKDESC ExtPackDesc;
725	RTCString *pstrErr = VBoxExtPackLoadDescFromVfsFile(hXmlFile, &ExtPackDesc, NULL);
726	if (pstrErr)
727	{
728	RTStrCopy(pszError, cbError, pstrErr->c_str());
729	delete pstrErr;
730	return VERR_PARSE_ERROR;
731	}
732
733	/*
734	* Check the name.
735	*/
736	/** @todo drop this restriction after the old install interface is
737	* dropped. */
738	int rc = VINF_SUCCESS;
739	if ( pszExtPackName
740	&& !ExtPackDesc.strName.equalsIgnoreCase(pszExtPackName))
741	rc = vboxExtPackReturnError(VERR_NOT_EQUAL, pszError, cbError,
742	"The name of the downloaded file and the name stored inside the extension pack does not match"
743	" (xml='%s' file='%s')", ExtPackDesc.strName.c_str(), pszExtPackName);
744	return rc;
745	}
746
747	/**
748	* Verifies the manifest and its signature.
749	*
750	* @returns VBox status code, failures with message.
751	* @param hOurManifest The manifest we compiled.
752	* @param hManifestFile The manifest file in the extension pack.
753	* @param hSignatureFile The manifest signature file.
754	* @param pszError Where to store an error message on failure.
755	* @param cbError The size of the buffer @a pszError points to.
756	*/
757	static int vboxExtPackVerifyManifestAndSignature(RTMANIFEST hOurManifest, RTVFSFILE hManifestFile, RTVFSFILE hSignatureFile,
758	char *pszError, size_t cbError)
759	{
760	/*
761	* Read the manifest from the extension pack.
762	*/
763	int rc = RTVfsFileSeek(hManifestFile, 0, RTFILE_SEEK_BEGIN, NULL);
764	if (RT_FAILURE(rc))
765	return vboxExtPackReturnError(rc, pszError, cbError, "RTVfsFileSeek failed: %Rrc", rc);
766
767	RTMANIFEST hTheirManifest;
768	rc = RTManifestCreate(0 /fFlags/, &hTheirManifest);
769	if (RT_FAILURE(rc))
770	return vboxExtPackReturnError(rc, pszError, cbError, "RTManifestCreate failed: %Rrc", rc);
771
772	RTVFSIOSTREAM hVfsIos = RTVfsFileToIoStream(hManifestFile);
773	rc = RTManifestReadStandard(hTheirManifest, hVfsIos);
774	RTVfsIoStrmRelease(hVfsIos);
775	if (RT_SUCCESS(rc))
776	{
777	/*
778	* Compare the manifests.
779	*/
780	static const char *s_apszIgnoreEntries[] =
781	{
782	VBOX_EXTPACK_MANIFEST_NAME,
783	VBOX_EXTPACK_SIGNATURE_NAME,
784	"./" VBOX_EXTPACK_MANIFEST_NAME,
785	"./" VBOX_EXTPACK_SIGNATURE_NAME,
786	NULL
787	};
788	char szError[RTPATH_MAX];
789	rc = RTManifestEqualsEx(hOurManifest, hTheirManifest, &s_apszIgnoreEntries[0], NULL,
790	RTMANIFEST_EQUALS_IGN_MISSING_ATTRS /fFlags/,
791	szError, sizeof(szError));
792	if (RT_SUCCESS(rc))
793	{
794	/*
795	* Validate the manifest file signature.
796	*/
797	/** @todo implement signature stuff */
798	NOREF(hSignatureFile);
799
800	}
801	else if (rc == VERR_NOT_EQUAL && szError[0])
802	vboxExtPackSetError(pszError, cbError, "Manifest mismatch: %s", szError);
803	else
804	vboxExtPackSetError(pszError, cbError, "RTManifestEqualsEx failed: %Rrc", rc);
805	#if 0
806	RTVFSIOSTREAM hVfsIosStdOut = NIL_RTVFSIOSTREAM;
807	RTVfsIoStrmFromStdHandle(RTHANDLESTD_OUTPUT, RTFILE_O_WRITE, true, &hVfsIosStdOut);
808	RTVfsIoStrmWrite(hVfsIosStdOut, "Our:\n", sizeof("Our:\n") - 1, true, NULL);
809	RTManifestWriteStandard(hOurManifest, hVfsIosStdOut);
810	RTVfsIoStrmWrite(hVfsIosStdOut, "Their:\n", sizeof("Their:\n") - 1, true, NULL);
811	RTManifestWriteStandard(hTheirManifest, hVfsIosStdOut);
812	#endif
813	}
814	else
815	vboxExtPackSetError(pszError, cbError, "Error parsing '%s': %Rrc", VBOX_EXTPACK_MANIFEST_NAME, rc);
816
817	RTManifestRelease(hTheirManifest);
818	return rc;
819	}
820
821
822	/**
823	* Verifies the file digest (if specified) and returns the SHA-256 of the file.
824	*
825	* @returns
826	* @param hFileManifest Manifest containing a SHA-256 digest of the file
827	* that was calculated as the file was processed.
828	* @param pszFileDigest SHA-256 digest of the file.
829	* @param pStrDigest Where to return the SHA-256 digest. Optional.
830	* @param pszError Where to write an error message on failure.
831	* @param cbError The size of the @a pszError buffer.
832	*/
833	static int vboxExtPackVerifyFileDigest(RTMANIFEST hFileManifest, const char *pszFileDigest,
834	RTCString pStrDigest, char pszError, size_t cbError)
835	{
836	/*
837	* Extract the SHA-256 entry for the extpack file.
838	*/
839	char szCalculatedDigest[RTSHA256_DIGEST_LEN + 1];
840	int rc = RTManifestEntryQueryAttr(hFileManifest, "extpack", NULL /no name/, RTMANIFEST_ATTR_SHA256,
841	szCalculatedDigest, sizeof(szCalculatedDigest), NULL);
842	if (RT_SUCCESS(rc))
843	{
844	/*
845	* Convert the two strings to binary form before comparing.
846	* We convert the calculated hash even if we don't have anything to
847	* compare with, just to validate it.
848	*/
849	uint8_t abCalculatedHash[RTSHA256_HASH_SIZE];
850	rc = RTSha256FromString(szCalculatedDigest, abCalculatedHash);
851	if (RT_SUCCESS(rc))
852	{
853	if ( pszFileDigest
854	&& *pszFileDigest != '\0')
855	{
856	uint8_t abFileHash[RTSHA256_HASH_SIZE];
857	rc = RTSha256FromString(pszFileDigest, abFileHash);
858	if (RT_SUCCESS(rc))
859	{
860	if (memcmp(abFileHash, abCalculatedHash, sizeof(abFileHash)))
861	{
862	vboxExtPackSetError(pszError, cbError, "The extension pack file has changed (SHA-256 mismatch)");
863	rc = VERR_NOT_EQUAL;
864	}
865	}
866	else
867	vboxExtPackSetError(pszError, cbError, "Bad SHA-256 '%s': %Rrc", szCalculatedDigest, rc);
868	}
869
870	/*
871	* Set the output hash on success.
872	*/
873	if (pStrDigest && RT_SUCCESS(rc))
874	{
875	try
876	{
877	*pStrDigest = szCalculatedDigest;
878	}
879	catch (std::bad_alloc &)
880	{
881	rc = VERR_NO_MEMORY;
882	}
883	}
884	}
885	else
886	vboxExtPackSetError(pszError, cbError, "Bad SHA-256 '%s': %Rrc", szCalculatedDigest, rc);
887	}
888	else
889	vboxExtPackSetError(pszError, cbError, "RTManifestEntryGetAttr: %Rrc", rc);
890	return rc;
891	}
892
893
894
895	/**
896	* Validates a standard file.
897	*
898	* Generally all files are
899	*
900	* @returns VBox status code, failure message in @a pszError.
901	* @param pszAdjName The adjusted member name.
902	* @param enmType The VFS object type.
903	* @param phVfsObj The pointer to the VFS object handle variable.
904	* This is both input and output.
905	* @param phVfsFile Where to store the handle to the memorized
906	* file. This is NULL for license files.
907	* @param pszError Where to write an error message on failure.
908	* @param cbError The size of the @a pszError buffer.
909	*/
910	static int VBoxExtPackValidateStandardFile(const char *pszAdjName, RTVFSOBJTYPE enmType,
911	PRTVFSOBJ phVfsObj, PRTVFSFILE phVfsFile, char *pszError, size_t cbError)
912	{
913	int rc;
914
915	/*
916	* Make sure it's a file and that it isn't too large.
917	*/
918	if (phVfsFile && *phVfsFile != NIL_RTVFSFILE)
919	rc = vboxExtPackReturnError(VERR_DUPLICATE, pszError, cbError,
920	"There can only be one '%s'", pszAdjName);
921	else if (enmType != RTVFSOBJTYPE_IO_STREAM && enmType != RTVFSOBJTYPE_FILE)
922	rc = vboxExtPackReturnError(VERR_NOT_A_FILE, pszError, cbError,
923	"Standard member '%s' is not a file", pszAdjName);
924	else
925	{
926	RTFSOBJINFO ObjInfo;
927	rc = RTVfsObjQueryInfo(*phVfsObj, &ObjInfo, RTFSOBJATTRADD_NOTHING);
928	if (RT_SUCCESS(rc))
929	{
930	if (!RTFS_IS_FILE(ObjInfo.Attr.fMode))
931	rc = vboxExtPackReturnError(VERR_NOT_A_FILE, pszError, cbError,
932	"Standard member '%s' is not a file", pszAdjName);
933	else if (ObjInfo.cbObject >= _1M)
934	rc = vboxExtPackReturnError(VERR_OUT_OF_RANGE, pszError, cbError,
935	"Standard member '%s' is too large: %'RU64 bytes (max 1 MB)",
936	pszAdjName, (uint64_t)ObjInfo.cbObject);
937	else
938	{
939	/*
940	* Make an in memory copy of the stream and check that the file
941	* is UTF-8 clean.
942	*/
943	RTVFSIOSTREAM hVfsIos = RTVfsObjToIoStream(*phVfsObj);
944	RTVFSFILE hVfsFile;
945	rc = RTVfsMemorizeIoStreamAsFile(hVfsIos, RTFILE_O_READ, &hVfsFile);
946	if (RT_SUCCESS(rc))
947	{
948	rc = RTVfsIoStrmValidateUtf8Encoding(hVfsIos,
949	RTVFS_VALIDATE_UTF8_BY_RTC_3629 \| RTVFS_VALIDATE_UTF8_NO_NULL,
950	NULL);
951	if (RT_SUCCESS(rc))
952	{
953	/*
954	* Replace *phVfsObj with the memorized file.
955	*/
956	rc = RTVfsFileSeek(hVfsFile, 0, RTFILE_SEEK_BEGIN, NULL);
957	if (RT_SUCCESS(rc))
958	{
959	RTVfsObjRelease(*phVfsObj);
960	*phVfsObj = RTVfsObjFromFile(hVfsFile);
961	}
962	else
963	vboxExtPackSetError(pszError, cbError, "RTVfsFileSeek failed on '%s': %Rrc", pszAdjName, rc);
964	}
965
966	if (phVfsFile && RT_SUCCESS(rc))
967	*phVfsFile = hVfsFile;
968	else
969	RTVfsFileRelease(hVfsFile);
970	}
971	else
972	vboxExtPackSetError(pszError, cbError, "RTVfsMemorizeIoStreamAsFile failed on '%s': %Rrc", pszAdjName, rc);
973	RTVfsIoStrmRelease(hVfsIos);
974	}
975	}
976	else
977	vboxExtPackSetError(pszError, cbError, "RTVfsObjQueryInfo failed on '%s': %Rrc", pszAdjName, rc);
978	}
979	return rc;
980	}
981
982
983	/**
984	* Validates a name in an extension pack.
985	*
986	* We restrict the charset to try make sure the extension pack can be unpacked
987	* on all file systems.
988	*
989	* @returns VBox status code, failures with message.
990	* @param pszName The name to validate.
991	* @param pszError Where to store an error message on failure.
992	* @param cbError The size of the buffer @a pszError points to.
993	*/
994	static int vboxExtPackValidateMemberName(const char pszName, char pszError, size_t cbError)
995	{
996	if (RTPathStartsWithRoot(pszName))
997	return vboxExtPackReturnError(VERR_PATH_IS_NOT_RELATIVE, pszError, cbError, "'%s': starts with root spec", pszName);
998
999	const char *pszErr = NULL;
1000	const char *psz = pszName;
1001	int ch;
1002	while ((ch = *psz) != '\0')
1003	{
1004	/* Character set restrictions. */
1005	if (ch < 0 \|\| ch >= 128)
1006	{
1007	pszErr = "Only 7-bit ASCII allowed";
1008	break;
1009	}
1010	if (ch <= 31 \|\| ch == 127)
1011	{
1012	pszErr = "No control characters are not allowed";
1013	break;
1014	}
1015	if (ch == '\\')
1016	{
1017	pszErr = "Only backward slashes are not allowed";
1018	break;
1019	}
1020	if (strchr("'\":;*?\|[]<>(){}", ch))
1021	{
1022	pszErr = "The characters ', \", :, ;, *, ?, \|, [, ], <, >, (, ), { and } are not allowed";
1023	break;
1024	}
1025
1026	/* Take the simple way out and ban all ".." sequences. */
1027	if ( ch == '.'
1028	&& psz[1] == '.')
1029	{
1030	pszErr = "Double dot sequence are not allowed";
1031	break;
1032	}
1033
1034	/* Keep the tree shallow or the hardening checks will fail. */
1035	if (psz - pszName > VBOX_EXTPACK_MAX_MEMBER_NAME_LENGTH)
1036	{
1037	pszErr = "Too long";
1038	break;
1039	}
1040
1041	/* advance */
1042	psz++;
1043	}
1044
1045	if (pszErr)
1046	return vboxExtPackReturnError(VERR_INVALID_NAME, pszError, cbError,
1047	"Bad member name '%s' (pos %zu): %s", pszName, (size_t)(psz - pszName), pszErr);
1048	return RTEXITCODE_SUCCESS;
1049	}
1050
1051
1052	/**
1053	* Validates a file in an extension pack.
1054	*
1055	* @returns VBox status code, failures with message.
1056	* @param pszName The name of the file.
1057	* @param hVfsObj The VFS object.
1058	* @param pszError Where to store an error message on failure.
1059	* @param cbError The size of the buffer @a pszError points to.
1060	*/
1061	static int vboxExtPackValidateMemberFile(const char pszName, RTVFSOBJ hVfsObj, char pszError, size_t cbError)
1062	{
1063	int rc = vboxExtPackValidateMemberName(pszName, pszError, cbError);
1064	if (RT_SUCCESS(rc))
1065	{
1066	RTFSOBJINFO ObjInfo;
1067	rc = RTVfsObjQueryInfo(hVfsObj, &ObjInfo, RTFSOBJATTRADD_NOTHING);
1068	if (RT_SUCCESS(rc))
1069	{
1070	if (ObjInfo.cbObject >= 9*_1G64)
1071	rc = vboxExtPackReturnError(VERR_OUT_OF_RANGE, pszError, cbError,
1072	"'%s': too large (%'RU64 bytes)",
1073	pszName, (uint64_t)ObjInfo.cbObject);
1074	if (!RTFS_IS_FILE(ObjInfo.Attr.fMode))
1075	rc = vboxExtPackReturnError(VERR_NOT_A_FILE, pszError, cbError,
1076	"The alleged file '%s' has a mode mask stating otherwise (%RTfmode)",
1077	pszName, ObjInfo.Attr.fMode);
1078	}
1079	else
1080	vboxExtPackSetError(pszError, cbError, "RTVfsObjQueryInfo failed on '%s': %Rrc", pszName, rc);
1081	}
1082	return rc;
1083	}
1084
1085
1086	/**
1087	* Validates a directory in an extension pack.
1088	*
1089	* @returns VBox status code, failures with message.
1090	* @param pszName The name of the directory.
1091	* @param hVfsObj The VFS object.
1092	* @param pszError Where to store an error message on failure.
1093	* @param cbError The size of the buffer @a pszError points to.
1094	*/
1095	static int vboxExtPackValidateMemberDir(const char pszName, RTVFSOBJ hVfsObj, char pszError, size_t cbError)
1096	{
1097	int rc = vboxExtPackValidateMemberName(pszName, pszError, cbError);
1098	if (RT_SUCCESS(rc))
1099	{
1100	RTFSOBJINFO ObjInfo;
1101	rc = RTVfsObjQueryInfo(hVfsObj, &ObjInfo, RTFSOBJATTRADD_NOTHING);
1102	if (RT_SUCCESS(rc))
1103	{
1104	if (!RTFS_IS_DIRECTORY(ObjInfo.Attr.fMode))
1105	rc = vboxExtPackReturnError(VERR_NOT_A_DIRECTORY, pszError, cbError,
1106	"The alleged directory '%s' has a mode mask saying differently (%RTfmode)",
1107	pszName, ObjInfo.Attr.fMode);
1108	}
1109	else
1110	vboxExtPackSetError(pszError, cbError, "RTVfsObjQueryInfo failed on '%s': %Rrc", pszName, rc);
1111	}
1112	return rc;
1113	}
1114
1115	/**
1116	* Validates a member of an extension pack.
1117	*
1118	* @returns VBox status code, failures with message.
1119	* @param pszName The name of the directory.
1120	* @param enmType The object type.
1121	* @param hVfsObj The VFS object.
1122	* @param pszError Where to store an error message on failure.
1123	* @param cbError The size of the buffer @a pszError points to.
1124	*/
1125	int VBoxExtPackValidateMember(const char pszName, RTVFSOBJTYPE enmType, RTVFSOBJ hVfsObj, char pszError, size_t cbError)
1126	{
1127	Assert(cbError > 0);
1128	*pszError = '\0';
1129
1130	int rc;
1131	if ( enmType == RTVFSOBJTYPE_FILE
1132	\|\| enmType == RTVFSOBJTYPE_IO_STREAM)
1133	rc = vboxExtPackValidateMemberFile(pszName, hVfsObj, pszError, cbError);
1134	else if ( enmType == RTVFSOBJTYPE_DIR
1135	\|\| enmType == RTVFSOBJTYPE_BASE)
1136	rc = vboxExtPackValidateMemberDir(pszName, hVfsObj, pszError, cbError);
1137	else
1138	rc = vboxExtPackReturnError(VERR_UNEXPECTED_FS_OBJ_TYPE, pszError, cbError,
1139	"'%s' is not a file or directory (enmType=%d)", pszName, enmType);
1140	return rc;
1141	}
1142
1143
1144	/**
1145	* Rewinds the tarball file handle and creates a gunzip \| tar chain that
1146	* results in a filesystem stream.
1147	*
1148	* @returns VBox status code, failures with message.
1149	* @param hTarballFile The handle to the tarball file.
1150	* @param pszError Where to store an error message on failure.
1151	* @param cbError The size of the buffer @a pszError points to.
1152	* @param phTarFss Where to return the filesystem stream handle.
1153	* @param phFileManifest Where to return a manifest where the tarball is
1154	* gettting hashed. The entry will be called
1155	* "extpack" and be ready when the file system
1156	* stream is at an end. Optional.
1157	*/
1158	int VBoxExtPackOpenTarFss(RTFILE hTarballFile, char *pszError, size_t cbError, PRTVFSFSSTREAM phTarFss,
1159	PRTMANIFEST phFileManifest)
1160	{
1161	Assert(cbError > 0);
1162	*pszError = '\0';
1163	*phTarFss = NIL_RTVFSFSSTREAM;
1164
1165	/*
1166	* Rewind the file and set up a VFS chain for it.
1167	*/
1168	int rc = RTFileSeek(hTarballFile, 0, RTFILE_SEEK_BEGIN, NULL);
1169	if (RT_FAILURE(rc))
1170	return vboxExtPackReturnError(rc, pszError, cbError, "Failed seeking to the start of the tarball: %Rrc", rc);
1171
1172	RTVFSIOSTREAM hTarballIos;
1173	rc = RTVfsIoStrmFromRTFile(hTarballFile, RTFILE_O_READ \| RTFILE_O_DENY_WRITE \| RTFILE_O_OPEN, true /fLeaveOpen/,
1174	&hTarballIos);
1175	if (RT_FAILURE(rc))
1176	return vboxExtPackReturnError(rc, pszError, cbError, "RTVfsIoStrmFromRTFile failed: %Rrc", rc);
1177
1178	RTMANIFEST hFileManifest = NIL_RTMANIFEST;
1179	rc = RTManifestCreate(0 /fFlags/, &hFileManifest);
1180	if (RT_SUCCESS(rc))
1181	{
1182	RTVFSIOSTREAM hPtIos;
1183	rc = RTManifestEntryAddPassthruIoStream(hFileManifest, hTarballIos, "extpack", RTMANIFEST_ATTR_SHA256,
1184	true /read/, &hPtIos);
1185	if (RT_SUCCESS(rc))
1186	{
1187	RTVFSIOSTREAM hGunzipIos;
1188	rc = RTZipGzipDecompressIoStream(hPtIos, 0 /fFlags/, &hGunzipIos);
1189	if (RT_SUCCESS(rc))
1190	{
1191	RTVFSFSSTREAM hTarFss;
1192	rc = RTZipTarFsStreamFromIoStream(hGunzipIos, 0 /fFlags/, &hTarFss);
1193	if (RT_SUCCESS(rc))
1194	{
1195	RTVfsIoStrmRelease(hPtIos);
1196	RTVfsIoStrmRelease(hGunzipIos);
1197	RTVfsIoStrmRelease(hTarballIos);
1198	*phTarFss = hTarFss;
1199	if (phFileManifest)
1200	*phFileManifest = hFileManifest;
1201	else
1202	RTManifestRelease(hFileManifest);
1203	return VINF_SUCCESS;
1204	}
1205
1206	vboxExtPackSetError(pszError, cbError, "RTZipTarFsStreamFromIoStream failed: %Rrc", rc);
1207	RTVfsIoStrmRelease(hGunzipIos);
1208	}
1209	else
1210	vboxExtPackSetError(pszError, cbError, "RTZipGzipDecompressIoStream failed: %Rrc", rc);
1211	RTVfsIoStrmRelease(hPtIos);
1212	}
1213	else
1214	vboxExtPackSetError(pszError, cbError, "RTManifestEntryAddPassthruIoStream failed: %Rrc", rc);
1215	RTManifestRelease(hFileManifest);
1216	}
1217	else
1218	vboxExtPackSetError(pszError, cbError, "RTManifestCreate failed: %Rrc", rc);
1219
1220	RTVfsIoStrmRelease(hTarballIos);
1221	return rc;
1222	}
1223
1224
1225	/**
1226	* Validates the extension pack tarball prior to unpacking.
1227	*
1228	* Operations performed:
1229	* - Mandatory files.
1230	* - Manifest check.
1231	* - Manifest seal check.
1232	* - XML check, match name.
1233	*
1234	* @returns VBox status code, failures with message.
1235	* @param hTarballFile The handle to open the @a pszTarball file.
1236	* @param pszExtPackName The name of the extension pack name. NULL if
1237	* the name is not fixed.
1238	* @param pszTarball The name of the tarball in case we have to
1239	* complain about something.
1240	* @param pszTarballDigest The SHA-256 digest of the tarball. Empty string
1241	* if no digest available.
1242	* @param pszError Where to store an error message on failure.
1243	* @param cbError The size of the buffer @a pszError points to.
1244	* @param phValidManifest Where to optionally return the handle to fully
1245	* validated the manifest for the extension pack.
1246	* This includes all files.
1247	* @param phXmlFile Where to optionally return the memorized XML
1248	* file.
1249	* @param pStrDigest Where to return the digest of the file.
1250	* Optional.
1251	*/
1252	int VBoxExtPackValidateTarball(RTFILE hTarballFile, const char *pszExtPackName,
1253	const char pszTarball, const char pszTarballDigest,
1254	char *pszError, size_t cbError,
1255	PRTMANIFEST phValidManifest, PRTVFSFILE phXmlFile, RTCString *pStrDigest)
1256	{
1257	/*
1258	* Clear return values.
1259	*/
1260	if (phValidManifest)
1261	*phValidManifest = NIL_RTMANIFEST;
1262	if (phXmlFile)
1263	*phXmlFile = NIL_RTVFSFILE;
1264	Assert(cbError > 1);
1265	*pszError = '\0';
1266	NOREF(pszTarball);
1267
1268	/*
1269	* Open the tar.gz filesystem stream and set up an manifest in-memory file.
1270	*/
1271	RTMANIFEST hFileManifest;
1272	RTVFSFSSTREAM hTarFss;
1273	int rc = VBoxExtPackOpenTarFss(hTarballFile, pszError, cbError, &hTarFss, &hFileManifest);
1274	if (RT_FAILURE(rc))
1275	return rc;
1276
1277	RTMANIFEST hOurManifest;
1278	rc = RTManifestCreate(0 /fFlags/, &hOurManifest);
1279	if (RT_SUCCESS(rc))
1280	{
1281	/*
1282	* Process the tarball (would be nice to move this to a function).
1283	*/
1284	RTVFSFILE hXmlFile = NIL_RTVFSFILE;
1285	RTVFSFILE hManifestFile = NIL_RTVFSFILE;
1286	RTVFSFILE hSignatureFile = NIL_RTVFSFILE;
1287	for (;;)
1288	{
1289	/*
1290	* Get the next stream object.
1291	*/
1292	char *pszName;
1293	RTVFSOBJ hVfsObj;
1294	RTVFSOBJTYPE enmType;
1295	rc = RTVfsFsStrmNext(hTarFss, &pszName, &enmType, &hVfsObj);
1296	if (RT_FAILURE(rc))
1297	{
1298	if (rc != VERR_EOF)
1299	vboxExtPackSetError(pszError, cbError, "RTVfsFsStrmNext failed: %Rrc", rc);
1300	else
1301	rc = VINF_SUCCESS;
1302	break;
1303	}
1304	const char *pszAdjName = pszName[0] == '.' && pszName[1] == '/' ? &pszName[2] : pszName;
1305
1306	/*
1307	* Check the type & name validity, performing special tests on
1308	* standard extension pack member files.
1309	*
1310	* N.B. We will always reach the end of the loop before breaking on
1311	* failure - cleanup reasons.
1312	*/
1313	rc = VBoxExtPackValidateMember(pszName, enmType, hVfsObj, pszError, cbError);
1314	if (RT_SUCCESS(rc))
1315	{
1316	PRTVFSFILE phVfsFile = NULL;
1317	if (!strcmp(pszAdjName, VBOX_EXTPACK_DESCRIPTION_NAME))
1318	phVfsFile = &hXmlFile;
1319	else if (!strcmp(pszAdjName, VBOX_EXTPACK_MANIFEST_NAME))
1320	phVfsFile = &hManifestFile;
1321	else if (!strcmp(pszAdjName, VBOX_EXTPACK_SIGNATURE_NAME))
1322	phVfsFile = &hSignatureFile;
1323	else if (!strncmp(pszAdjName, VBOX_EXTPACK_LICENSE_NAME_PREFIX, sizeof(VBOX_EXTPACK_LICENSE_NAME_PREFIX) - 1))
1324	rc = VBoxExtPackValidateStandardFile(pszAdjName, enmType, &hVfsObj, NULL, pszError, cbError);
1325	if (phVfsFile)
1326	rc = VBoxExtPackValidateStandardFile(pszAdjName, enmType, &hVfsObj, phVfsFile, pszError, cbError);
1327	}
1328
1329	/*
1330	* Add any I/O stream to the manifest
1331	*/
1332	if ( RT_SUCCESS(rc)
1333	&& ( enmType == RTVFSOBJTYPE_FILE
1334	\|\| enmType == RTVFSOBJTYPE_IO_STREAM))
1335	{
1336	RTVFSIOSTREAM hVfsIos = RTVfsObjToIoStream(hVfsObj);
1337	rc = RTManifestEntryAddIoStream(hOurManifest, hVfsIos, pszAdjName, RTMANIFEST_ATTR_SIZE \| RTMANIFEST_ATTR_SHA256);
1338	if (RT_FAILURE(rc))
1339	vboxExtPackSetError(pszError, cbError, "RTManifestEntryAddIoStream failed on '%s': %Rrc", pszAdjName, rc);
1340	RTVfsIoStrmRelease(hVfsIos);
1341	}
1342
1343	/*
1344	* Clean up and break out on failure.
1345	*/
1346	RTVfsObjRelease(hVfsObj);
1347	RTStrFree(pszName);
1348	if (RT_FAILURE(rc))
1349	break;
1350	}
1351
1352	/*
1353	* Check the integrity of the tarball file.
1354	*/
1355	if (RT_SUCCESS(rc))
1356	{
1357	RTVfsFsStrmRelease(hTarFss);
1358	hTarFss = NIL_RTVFSFSSTREAM;
1359	rc = vboxExtPackVerifyFileDigest(hFileManifest, pszTarballDigest, pStrDigest, pszError, cbError);
1360	}
1361
1362	/*
1363	* If we've successfully processed the tarball, verify that the
1364	* mandatory files are present.
1365	*/
1366	if (RT_SUCCESS(rc))
1367	{
1368	if (hXmlFile == NIL_RTVFSFILE)
1369	rc = vboxExtPackReturnError(VERR_MISSING, pszError, cbError, "Mandator file '%s' is missing",
1370	VBOX_EXTPACK_DESCRIPTION_NAME);
1371	if (hManifestFile == NIL_RTVFSFILE)
1372	rc = vboxExtPackReturnError(VERR_MISSING, pszError, cbError, "Mandator file '%s' is missing",
1373	VBOX_EXTPACK_MANIFEST_NAME);
1374	if (hSignatureFile == NIL_RTVFSFILE)
1375	rc = vboxExtPackReturnError(VERR_MISSING, pszError, cbError, "Mandator file '%s' is missing",
1376	VBOX_EXTPACK_SIGNATURE_NAME);
1377	}
1378
1379	/*
1380	* Check the manifest and it's signature.
1381	*/
1382	if (RT_SUCCESS(rc))
1383	rc = vboxExtPackVerifyManifestAndSignature(hOurManifest, hManifestFile, hSignatureFile, pszError, cbError);
1384
1385	/*
1386	* Check the XML.
1387	*/
1388	if (RT_SUCCESS(rc))
1389	rc = vboxExtPackVerifyXml(hXmlFile, pszExtPackName, pszError, cbError);
1390
1391	/*
1392	* Returns objects.
1393	*/
1394	if (RT_SUCCESS(rc))
1395	{
1396	if (phValidManifest)
1397	{
1398	RTManifestRetain(hOurManifest);
1399	*phValidManifest = hOurManifest;
1400	}
1401	if (phXmlFile)
1402	{
1403	RTVfsFileRetain(hXmlFile);
1404	*phXmlFile = hXmlFile;
1405	}
1406	}
1407
1408	/*
1409	* Release our object references.
1410	*/
1411	RTManifestRelease(hOurManifest);
1412	RTVfsFileRelease(hXmlFile);
1413	RTVfsFileRelease(hManifestFile);
1414	RTVfsFileRelease(hSignatureFile);
1415	}
1416	else
1417	vboxExtPackSetError(pszError, cbError, "RTManifestCreate failed: %Rrc", rc);
1418	RTVfsFsStrmRelease(hTarFss);
1419	RTManifestRelease(hFileManifest);
1420
1421	return rc;
1422	}
1423

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source: vbox/trunk/src/VBox/Main/src-all/ExtPackUtil.cpp@ 85233

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