Line data Source code
1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include <com/sun/star/lang/XMultiServiceFactory.hpp>
21 : #include <com/sun/star/ucb/XProgressHandler.hpp>
22 : #include <com/sun/star/packages/zip/ZipConstants.hpp>
23 : #include <com/sun/star/xml/crypto/XCipherContext.hpp>
24 : #include <com/sun/star/xml/crypto/XDigestContext.hpp>
25 : #include <com/sun/star/xml/crypto/XCipherContextSupplier.hpp>
26 : #include <com/sun/star/xml/crypto/XDigestContextSupplier.hpp>
27 : #include <com/sun/star/xml/crypto/CipherID.hpp>
28 : #include <com/sun/star/xml/crypto/DigestID.hpp>
29 : #include <com/sun/star/xml/crypto/NSSInitializer.hpp>
30 :
31 : #include <comphelper/storagehelper.hxx>
32 : #include <comphelper/processfactory.hxx>
33 : #include <rtl/digest.h>
34 :
35 : #include <vector>
36 :
37 : #include "blowfishcontext.hxx"
38 : #include "sha1context.hxx"
39 : #include <ZipFile.hxx>
40 : #include <ZipEnumeration.hxx>
41 : #include <XUnbufferedStream.hxx>
42 : #include <PackageConstants.hxx>
43 : #include <EncryptedDataHeader.hxx>
44 : #include <EncryptionData.hxx>
45 : #include <MemoryByteGrabber.hxx>
46 :
47 : #include <CRC32.hxx>
48 :
49 : using namespace com::sun::star;
50 : using namespace com::sun::star::io;
51 : using namespace com::sun::star::uno;
52 : using namespace com::sun::star::ucb;
53 : using namespace com::sun::star::lang;
54 : using namespace com::sun::star::packages;
55 : using namespace com::sun::star::packages::zip;
56 : using namespace com::sun::star::packages::zip::ZipConstants;
57 :
58 : using ZipUtils::Inflater;
59 :
60 : #if OSL_DEBUG_LEVEL > 0
61 : #define THROW_WHERE SAL_WHERE
62 : #else
63 : #define THROW_WHERE ""
64 : #endif
65 :
66 : /** This class is used to read entries from a zip file
67 : */
68 722 : ZipFile::ZipFile( uno::Reference < XInputStream > &xInput, const uno::Reference < XComponentContext > & rxContext, sal_Bool bInitialise )
69 : throw(IOException, ZipException, RuntimeException)
70 : : aGrabber(xInput)
71 : , aInflater( true )
72 : , xStream(xInput)
73 : , xSeek(xInput, UNO_QUERY)
74 : , m_xContext ( rxContext )
75 736 : , bRecoveryMode( sal_False )
76 : {
77 722 : if (bInitialise)
78 : {
79 267 : if ( readCEN() == -1 )
80 : {
81 1 : aEntries.clear();
82 1 : throw ZipException( "stream data looks to be broken", uno::Reference < XInterface > () );
83 : }
84 : }
85 708 : }
86 :
87 5466 : ZipFile::ZipFile( uno::Reference < XInputStream > &xInput, const uno::Reference < XComponentContext > & rxContext, sal_Bool bInitialise, sal_Bool bForceRecovery, uno::Reference < XProgressHandler > xProgress )
88 : throw(IOException, ZipException, RuntimeException)
89 : : aGrabber(xInput)
90 : , aInflater( true )
91 : , xStream(xInput)
92 : , xSeek(xInput, UNO_QUERY)
93 : , m_xContext ( rxContext )
94 : , xProgressHandler( xProgress )
95 5466 : , bRecoveryMode( bForceRecovery )
96 : {
97 5466 : if (bInitialise)
98 : {
99 5466 : if ( bForceRecovery )
100 : {
101 0 : recover();
102 : }
103 5466 : else if ( readCEN() == -1 )
104 : {
105 0 : aEntries.clear();
106 0 : throw ZipException("stream data looks to be broken", uno::Reference < XInterface > () );
107 : }
108 : }
109 5466 : }
110 :
111 12318 : ZipFile::~ZipFile()
112 : {
113 6159 : aEntries.clear();
114 6159 : }
115 :
116 27 : void ZipFile::setInputStream ( uno::Reference < XInputStream > xNewStream )
117 : {
118 27 : ::osl::MutexGuard aGuard( m_aMutex );
119 :
120 27 : xStream = xNewStream;
121 27 : xSeek = uno::Reference < XSeekable > ( xStream, UNO_QUERY );
122 27 : aGrabber.setInputStream ( xStream );
123 27 : }
124 :
125 26 : uno::Reference< xml::crypto::XDigestContext > ZipFile::StaticGetDigestContextForChecksum( const uno::Reference< uno::XComponentContext >& xArgContext, const ::rtl::Reference< EncryptionData >& xEncryptionData )
126 : {
127 26 : uno::Reference< xml::crypto::XDigestContext > xDigestContext;
128 26 : if ( xEncryptionData->m_nCheckAlg == xml::crypto::DigestID::SHA256_1K )
129 : {
130 22 : uno::Reference< uno::XComponentContext > xContext = xArgContext;
131 22 : if ( !xContext.is() )
132 0 : xContext = comphelper::getProcessComponentContext();
133 :
134 44 : uno::Reference< xml::crypto::XNSSInitializer > xDigestContextSupplier = xml::crypto::NSSInitializer::create( xContext );
135 :
136 44 : xDigestContext.set( xDigestContextSupplier->getDigestContext( xEncryptionData->m_nCheckAlg, uno::Sequence< beans::NamedValue >() ), uno::UNO_SET_THROW );
137 : }
138 4 : else if ( xEncryptionData->m_nCheckAlg == xml::crypto::DigestID::SHA1_1K )
139 4 : xDigestContext.set( SHA1DigestContext::Create(), uno::UNO_SET_THROW );
140 :
141 26 : return xDigestContext;
142 : }
143 :
144 43 : uno::Reference< xml::crypto::XCipherContext > ZipFile::StaticGetCipher( const uno::Reference< uno::XComponentContext >& xArgContext, const ::rtl::Reference< EncryptionData >& xEncryptionData, bool bEncrypt )
145 : {
146 43 : uno::Reference< xml::crypto::XCipherContext > xResult;
147 :
148 : try
149 : {
150 43 : if (xEncryptionData->m_nDerivedKeySize < 0)
151 : {
152 : throw ZipIOException("Invalid derived key length!",
153 0 : uno::Reference< XInterface >() );
154 : }
155 :
156 43 : uno::Sequence< sal_Int8 > aDerivedKey( xEncryptionData->m_nDerivedKeySize );
157 86 : if ( rtl_Digest_E_None != rtl_digest_PBKDF2( reinterpret_cast< sal_uInt8* >( aDerivedKey.getArray() ),
158 43 : aDerivedKey.getLength(),
159 43 : reinterpret_cast< const sal_uInt8 * > (xEncryptionData->m_aKey.getConstArray() ),
160 43 : xEncryptionData->m_aKey.getLength(),
161 43 : reinterpret_cast< const sal_uInt8 * > ( xEncryptionData->m_aSalt.getConstArray() ),
162 43 : xEncryptionData->m_aSalt.getLength(),
163 215 : xEncryptionData->m_nIterationCount ) )
164 : {
165 : throw ZipIOException("Can not create derived key!",
166 0 : uno::Reference< XInterface >() );
167 : }
168 :
169 43 : if ( xEncryptionData->m_nEncAlg == xml::crypto::CipherID::AES_CBC_W3C_PADDING )
170 : {
171 35 : uno::Reference< uno::XComponentContext > xContext = xArgContext;
172 35 : if ( !xContext.is() )
173 0 : xContext = comphelper::getProcessComponentContext();
174 :
175 70 : uno::Reference< xml::crypto::XNSSInitializer > xCipherContextSupplier = xml::crypto::NSSInitializer::create( xContext );
176 :
177 70 : xResult = xCipherContextSupplier->getCipherContext( xEncryptionData->m_nEncAlg, aDerivedKey, xEncryptionData->m_aInitVector, bEncrypt, uno::Sequence< beans::NamedValue >() );
178 : }
179 8 : else if ( xEncryptionData->m_nEncAlg == xml::crypto::CipherID::BLOWFISH_CFB_8 )
180 : {
181 8 : xResult = BlowfishCFB8CipherContext::Create( aDerivedKey, xEncryptionData->m_aInitVector, bEncrypt );
182 : }
183 : else
184 : {
185 : throw ZipIOException("Unknown cipher algorithm is requested!",
186 0 : uno::Reference< XInterface >() );
187 43 : }
188 : }
189 0 : catch( ... )
190 : {
191 : OSL_ENSURE( false, "Can not create cipher context!" );
192 : }
193 :
194 43 : return xResult;
195 : }
196 :
197 0 : void ZipFile::StaticFillHeader( const ::rtl::Reference< EncryptionData >& rData,
198 : sal_Int64 nSize,
199 : const OUString& aMediaType,
200 : sal_Int8 * & pHeader )
201 : {
202 : // I think it's safe to restrict vector and salt length to 2 bytes !
203 0 : sal_Int16 nIVLength = static_cast < sal_Int16 > ( rData->m_aInitVector.getLength() );
204 0 : sal_Int16 nSaltLength = static_cast < sal_Int16 > ( rData->m_aSalt.getLength() );
205 0 : sal_Int16 nDigestLength = static_cast < sal_Int16 > ( rData->m_aDigest.getLength() );
206 0 : sal_Int16 nMediaTypeLength = static_cast < sal_Int16 > ( aMediaType.getLength() * sizeof( sal_Unicode ) );
207 :
208 : // First the header
209 0 : *(pHeader++) = ( n_ConstHeader >> 0 ) & 0xFF;
210 0 : *(pHeader++) = ( n_ConstHeader >> 8 ) & 0xFF;
211 0 : *(pHeader++) = ( n_ConstHeader >> 16 ) & 0xFF;
212 0 : *(pHeader++) = ( n_ConstHeader >> 24 ) & 0xFF;
213 :
214 : // Then the version
215 0 : *(pHeader++) = ( n_ConstCurrentVersion >> 0 ) & 0xFF;
216 0 : *(pHeader++) = ( n_ConstCurrentVersion >> 8 ) & 0xFF;
217 :
218 : // Then the iteration Count
219 0 : sal_Int32 nIterationCount = rData->m_nIterationCount;
220 0 : *(pHeader++) = static_cast< sal_Int8 >(( nIterationCount >> 0 ) & 0xFF);
221 0 : *(pHeader++) = static_cast< sal_Int8 >(( nIterationCount >> 8 ) & 0xFF);
222 0 : *(pHeader++) = static_cast< sal_Int8 >(( nIterationCount >> 16 ) & 0xFF);
223 0 : *(pHeader++) = static_cast< sal_Int8 >(( nIterationCount >> 24 ) & 0xFF);
224 :
225 : // FIXME64: need to handle larger sizes
226 : // Then the size:
227 0 : *(pHeader++) = static_cast< sal_Int8 >(( nSize >> 0 ) & 0xFF);
228 0 : *(pHeader++) = static_cast< sal_Int8 >(( nSize >> 8 ) & 0xFF);
229 0 : *(pHeader++) = static_cast< sal_Int8 >(( nSize >> 16 ) & 0xFF);
230 0 : *(pHeader++) = static_cast< sal_Int8 >(( nSize >> 24 ) & 0xFF);
231 :
232 : // Then the encryption algorithm
233 0 : sal_Int32 nEncAlgID = rData->m_nEncAlg;
234 0 : *(pHeader++) = static_cast< sal_Int8 >(( nEncAlgID >> 0 ) & 0xFF);
235 0 : *(pHeader++) = static_cast< sal_Int8 >(( nEncAlgID >> 8 ) & 0xFF);
236 0 : *(pHeader++) = static_cast< sal_Int8 >(( nEncAlgID >> 16 ) & 0xFF);
237 0 : *(pHeader++) = static_cast< sal_Int8 >(( nEncAlgID >> 24 ) & 0xFF);
238 :
239 : // Then the checksum algorithm
240 0 : sal_Int32 nChecksumAlgID = rData->m_nCheckAlg;
241 0 : *(pHeader++) = static_cast< sal_Int8 >(( nChecksumAlgID >> 0 ) & 0xFF);
242 0 : *(pHeader++) = static_cast< sal_Int8 >(( nChecksumAlgID >> 8 ) & 0xFF);
243 0 : *(pHeader++) = static_cast< sal_Int8 >(( nChecksumAlgID >> 16 ) & 0xFF);
244 0 : *(pHeader++) = static_cast< sal_Int8 >(( nChecksumAlgID >> 24 ) & 0xFF);
245 :
246 : // Then the derived key size
247 0 : sal_Int32 nDerivedKeySize = rData->m_nDerivedKeySize;
248 0 : *(pHeader++) = static_cast< sal_Int8 >(( nDerivedKeySize >> 0 ) & 0xFF);
249 0 : *(pHeader++) = static_cast< sal_Int8 >(( nDerivedKeySize >> 8 ) & 0xFF);
250 0 : *(pHeader++) = static_cast< sal_Int8 >(( nDerivedKeySize >> 16 ) & 0xFF);
251 0 : *(pHeader++) = static_cast< sal_Int8 >(( nDerivedKeySize >> 24 ) & 0xFF);
252 :
253 : // Then the start key generation algorithm
254 0 : sal_Int32 nKeyAlgID = rData->m_nStartKeyGenID;
255 0 : *(pHeader++) = static_cast< sal_Int8 >(( nKeyAlgID >> 0 ) & 0xFF);
256 0 : *(pHeader++) = static_cast< sal_Int8 >(( nKeyAlgID >> 8 ) & 0xFF);
257 0 : *(pHeader++) = static_cast< sal_Int8 >(( nKeyAlgID >> 16 ) & 0xFF);
258 0 : *(pHeader++) = static_cast< sal_Int8 >(( nKeyAlgID >> 24 ) & 0xFF);
259 :
260 : // Then the salt length
261 0 : *(pHeader++) = static_cast< sal_Int8 >(( nSaltLength >> 0 ) & 0xFF);
262 0 : *(pHeader++) = static_cast< sal_Int8 >(( nSaltLength >> 8 ) & 0xFF);
263 :
264 : // Then the IV length
265 0 : *(pHeader++) = static_cast< sal_Int8 >(( nIVLength >> 0 ) & 0xFF);
266 0 : *(pHeader++) = static_cast< sal_Int8 >(( nIVLength >> 8 ) & 0xFF);
267 :
268 : // Then the digest length
269 0 : *(pHeader++) = static_cast< sal_Int8 >(( nDigestLength >> 0 ) & 0xFF);
270 0 : *(pHeader++) = static_cast< sal_Int8 >(( nDigestLength >> 8 ) & 0xFF);
271 :
272 : // Then the mediatype length
273 0 : *(pHeader++) = static_cast< sal_Int8 >(( nMediaTypeLength >> 0 ) & 0xFF);
274 0 : *(pHeader++) = static_cast< sal_Int8 >(( nMediaTypeLength >> 8 ) & 0xFF);
275 :
276 : // Then the salt content
277 0 : memcpy ( pHeader, rData->m_aSalt.getConstArray(), nSaltLength );
278 0 : pHeader += nSaltLength;
279 :
280 : // Then the IV content
281 0 : memcpy ( pHeader, rData->m_aInitVector.getConstArray(), nIVLength );
282 0 : pHeader += nIVLength;
283 :
284 : // Then the digest content
285 0 : memcpy ( pHeader, rData->m_aDigest.getConstArray(), nDigestLength );
286 0 : pHeader += nDigestLength;
287 :
288 : // Then the mediatype itself
289 0 : memcpy ( pHeader, aMediaType.getStr(), nMediaTypeLength );
290 0 : pHeader += nMediaTypeLength;
291 0 : }
292 :
293 0 : sal_Bool ZipFile::StaticFillData ( ::rtl::Reference< BaseEncryptionData > & rData,
294 : sal_Int32 &rEncAlg,
295 : sal_Int32 &rChecksumAlg,
296 : sal_Int32 &rDerivedKeySize,
297 : sal_Int32 &rStartKeyGenID,
298 : sal_Int32 &rSize,
299 : OUString& aMediaType,
300 : const uno::Reference< XInputStream >& rStream )
301 : {
302 0 : sal_Bool bOk = sal_False;
303 0 : const sal_Int32 nHeaderSize = n_ConstHeaderSize - 4;
304 0 : Sequence < sal_Int8 > aBuffer ( nHeaderSize );
305 0 : if ( nHeaderSize == rStream->readBytes ( aBuffer, nHeaderSize ) )
306 : {
307 0 : sal_Int16 nPos = 0;
308 0 : sal_Int8 *pBuffer = aBuffer.getArray();
309 0 : sal_Int16 nVersion = pBuffer[nPos++] & 0xFF;
310 0 : nVersion |= ( pBuffer[nPos++] & 0xFF ) << 8;
311 0 : if ( nVersion == n_ConstCurrentVersion )
312 : {
313 0 : sal_Int32 nCount = pBuffer[nPos++] & 0xFF;
314 0 : nCount |= ( pBuffer[nPos++] & 0xFF ) << 8;
315 0 : nCount |= ( pBuffer[nPos++] & 0xFF ) << 16;
316 0 : nCount |= ( pBuffer[nPos++] & 0xFF ) << 24;
317 0 : rData->m_nIterationCount = nCount;
318 :
319 0 : rSize = pBuffer[nPos++] & 0xFF;
320 0 : rSize |= ( pBuffer[nPos++] & 0xFF ) << 8;
321 0 : rSize |= ( pBuffer[nPos++] & 0xFF ) << 16;
322 0 : rSize |= ( pBuffer[nPos++] & 0xFF ) << 24;
323 :
324 0 : rEncAlg = pBuffer[nPos++] & 0xFF;
325 0 : rEncAlg |= ( pBuffer[nPos++] & 0xFF ) << 8;
326 0 : rEncAlg |= ( pBuffer[nPos++] & 0xFF ) << 16;
327 0 : rEncAlg |= ( pBuffer[nPos++] & 0xFF ) << 24;
328 :
329 0 : rChecksumAlg = pBuffer[nPos++] & 0xFF;
330 0 : rChecksumAlg |= ( pBuffer[nPos++] & 0xFF ) << 8;
331 0 : rChecksumAlg |= ( pBuffer[nPos++] & 0xFF ) << 16;
332 0 : rChecksumAlg |= ( pBuffer[nPos++] & 0xFF ) << 24;
333 :
334 0 : rDerivedKeySize = pBuffer[nPos++] & 0xFF;
335 0 : rDerivedKeySize |= ( pBuffer[nPos++] & 0xFF ) << 8;
336 0 : rDerivedKeySize |= ( pBuffer[nPos++] & 0xFF ) << 16;
337 0 : rDerivedKeySize |= ( pBuffer[nPos++] & 0xFF ) << 24;
338 :
339 0 : rStartKeyGenID = pBuffer[nPos++] & 0xFF;
340 0 : rStartKeyGenID |= ( pBuffer[nPos++] & 0xFF ) << 8;
341 0 : rStartKeyGenID |= ( pBuffer[nPos++] & 0xFF ) << 16;
342 0 : rStartKeyGenID |= ( pBuffer[nPos++] & 0xFF ) << 24;
343 :
344 0 : sal_Int16 nSaltLength = pBuffer[nPos++] & 0xFF;
345 0 : nSaltLength |= ( pBuffer[nPos++] & 0xFF ) << 8;
346 0 : sal_Int16 nIVLength = ( pBuffer[nPos++] & 0xFF );
347 0 : nIVLength |= ( pBuffer[nPos++] & 0xFF ) << 8;
348 0 : sal_Int16 nDigestLength = pBuffer[nPos++] & 0xFF;
349 0 : nDigestLength |= ( pBuffer[nPos++] & 0xFF ) << 8;
350 :
351 0 : sal_Int16 nMediaTypeLength = pBuffer[nPos++] & 0xFF;
352 0 : nMediaTypeLength |= ( pBuffer[nPos++] & 0xFF ) << 8;
353 :
354 0 : if ( nSaltLength == rStream->readBytes ( aBuffer, nSaltLength ) )
355 : {
356 0 : rData->m_aSalt.realloc ( nSaltLength );
357 0 : memcpy ( rData->m_aSalt.getArray(), aBuffer.getConstArray(), nSaltLength );
358 0 : if ( nIVLength == rStream->readBytes ( aBuffer, nIVLength ) )
359 : {
360 0 : rData->m_aInitVector.realloc ( nIVLength );
361 0 : memcpy ( rData->m_aInitVector.getArray(), aBuffer.getConstArray(), nIVLength );
362 0 : if ( nDigestLength == rStream->readBytes ( aBuffer, nDigestLength ) )
363 : {
364 0 : rData->m_aDigest.realloc ( nDigestLength );
365 0 : memcpy ( rData->m_aDigest.getArray(), aBuffer.getConstArray(), nDigestLength );
366 :
367 0 : if ( nMediaTypeLength == rStream->readBytes ( aBuffer, nMediaTypeLength ) )
368 : {
369 0 : aMediaType = OUString( (sal_Unicode*)aBuffer.getConstArray(),
370 0 : nMediaTypeLength / sizeof( sal_Unicode ) );
371 0 : bOk = sal_True;
372 : }
373 : }
374 : }
375 : }
376 : }
377 : }
378 0 : return bOk;
379 : }
380 :
381 0 : uno::Reference< XInputStream > ZipFile::StaticGetDataFromRawStream( const uno::Reference< uno::XComponentContext >& rxContext,
382 : const uno::Reference< XInputStream >& xStream,
383 : const ::rtl::Reference< EncryptionData > &rData )
384 : throw ( packages::WrongPasswordException, ZipIOException, RuntimeException )
385 : {
386 0 : if ( !rData.is() )
387 : throw ZipIOException("Encrypted stream without encryption data!\n",
388 0 : uno::Reference< XInterface >() );
389 :
390 0 : if ( !rData->m_aKey.getLength() )
391 0 : throw packages::WrongPasswordException(THROW_WHERE, uno::Reference< uno::XInterface >() );
392 :
393 0 : uno::Reference< XSeekable > xSeek( xStream, UNO_QUERY );
394 0 : if ( !xSeek.is() )
395 : throw ZipIOException("The stream must be seekable!\n",
396 0 : uno::Reference< XInterface >() );
397 :
398 : // if we have a digest, then this file is an encrypted one and we should
399 : // check if we can decrypt it or not
400 : OSL_ENSURE( rData->m_aDigest.getLength(), "Can't detect password correctness without digest!\n" );
401 0 : if ( rData->m_aDigest.getLength() )
402 : {
403 0 : sal_Int32 nSize = sal::static_int_cast< sal_Int32 >( xSeek->getLength() );
404 0 : if ( nSize > n_ConstDigestLength + 32 )
405 0 : nSize = n_ConstDigestLength + 32;
406 :
407 : // skip header
408 0 : xSeek->seek( n_ConstHeaderSize + rData->m_aInitVector.getLength() +
409 0 : rData->m_aSalt.getLength() + rData->m_aDigest.getLength() );
410 :
411 : // Only want to read enough to verify the digest
412 0 : Sequence < sal_Int8 > aReadBuffer ( nSize );
413 :
414 0 : xStream->readBytes( aReadBuffer, nSize );
415 :
416 0 : if ( !StaticHasValidPassword( rxContext, aReadBuffer, rData ) )
417 0 : throw packages::WrongPasswordException(THROW_WHERE, uno::Reference< uno::XInterface >() );
418 : }
419 :
420 0 : return new XUnbufferedStream( rxContext, xStream, rData );
421 : }
422 :
423 : #if 0
424 : // for debugging purposes
425 : void CheckSequence( const uno::Sequence< sal_Int8 >& aSequence )
426 : {
427 : if ( aSequence.getLength() )
428 : {
429 : sal_Int32* pPointer = *( (sal_Int32**)&aSequence );
430 : sal_Int32 nSize = *( pPointer + 1 );
431 : sal_Int32 nMemSize = *( pPointer - 2 );
432 : sal_Int32 nUsedMemSize = ( nSize + 4 * sizeof( sal_Int32 ) );
433 : OSL_ENSURE( nSize == aSequence.getLength() && nUsedMemSize + 7 - ( nUsedMemSize - 1 ) % 8 == nMemSize, "Broken Sequence!" );
434 : }
435 : }
436 : #endif
437 :
438 21 : sal_Bool ZipFile::StaticHasValidPassword( const uno::Reference< uno::XComponentContext >& rxContext, const Sequence< sal_Int8 > &aReadBuffer, const ::rtl::Reference< EncryptionData > &rData )
439 : {
440 21 : if ( !rData.is() || !rData->m_aKey.getLength() )
441 0 : return sal_False;
442 :
443 21 : sal_Bool bRet = sal_False;
444 :
445 21 : uno::Reference< xml::crypto::XCipherContext > xCipher( StaticGetCipher( rxContext, rData, false ), uno::UNO_SET_THROW );
446 :
447 42 : uno::Sequence< sal_Int8 > aDecryptBuffer;
448 42 : uno::Sequence< sal_Int8 > aDecryptBuffer2;
449 : try
450 : {
451 21 : aDecryptBuffer = xCipher->convertWithCipherContext( aReadBuffer );
452 21 : aDecryptBuffer2 = xCipher->finalizeCipherContextAndDispose();
453 : }
454 13 : catch( uno::Exception& )
455 : {
456 : // decryption with padding will throw the exception in finalizing if the buffer represent only part of the stream
457 : // it is no problem, actually this is why we read 32 additional bytes ( two of maximal possible encryption blocks )
458 : }
459 :
460 21 : if ( aDecryptBuffer2.getLength() )
461 : {
462 4 : sal_Int32 nOldLen = aDecryptBuffer.getLength();
463 4 : aDecryptBuffer.realloc( nOldLen + aDecryptBuffer2.getLength() );
464 4 : memcpy( aDecryptBuffer.getArray() + nOldLen, aDecryptBuffer2.getArray(), aDecryptBuffer2.getLength() );
465 : }
466 :
467 21 : if ( aDecryptBuffer.getLength() > n_ConstDigestLength )
468 12 : aDecryptBuffer.realloc( n_ConstDigestLength );
469 :
470 42 : uno::Sequence< sal_Int8 > aDigestSeq;
471 42 : uno::Reference< xml::crypto::XDigestContext > xDigestContext( StaticGetDigestContextForChecksum( rxContext, rData ), uno::UNO_SET_THROW );
472 :
473 21 : xDigestContext->updateDigest( aDecryptBuffer );
474 21 : aDigestSeq = xDigestContext->finalizeDigestAndDispose();
475 :
476 : // If we don't have a digest, then we have to assume that the password is correct
477 46 : if ( rData->m_aDigest.getLength() != 0 &&
478 42 : ( aDigestSeq.getLength() != rData->m_aDigest.getLength() ||
479 21 : 0 != memcmp ( aDigestSeq.getConstArray(),
480 21 : rData->m_aDigest.getConstArray(),
481 42 : aDigestSeq.getLength() ) ) )
482 : {
483 : // We should probably tell the user that the password they entered was wrong
484 : }
485 : else
486 17 : bRet = sal_True;
487 :
488 42 : return bRet;
489 : }
490 :
491 21 : sal_Bool ZipFile::hasValidPassword ( ZipEntry & rEntry, const ::rtl::Reference< EncryptionData >& rData )
492 : {
493 21 : ::osl::MutexGuard aGuard( m_aMutex );
494 :
495 21 : sal_Bool bRet = sal_False;
496 21 : if ( rData.is() && rData->m_aKey.getLength() )
497 : {
498 21 : xSeek->seek( rEntry.nOffset );
499 21 : sal_Int64 nSize = rEntry.nMethod == DEFLATED ? rEntry.nCompressedSize : rEntry.nSize;
500 :
501 : // Only want to read enough to verify the digest
502 21 : if ( nSize > n_ConstDigestDecrypt )
503 11 : nSize = n_ConstDigestDecrypt;
504 :
505 21 : Sequence < sal_Int8 > aReadBuffer ( nSize );
506 :
507 21 : xStream->readBytes( aReadBuffer, nSize );
508 :
509 21 : bRet = StaticHasValidPassword( m_xContext, aReadBuffer, rData );
510 : }
511 :
512 21 : return bRet;
513 : }
514 :
515 37053 : uno::Reference< XInputStream > ZipFile::createUnbufferedStream(
516 : SotMutexHolderRef aMutexHolder,
517 : ZipEntry & rEntry,
518 : const ::rtl::Reference< EncryptionData > &rData,
519 : sal_Int8 nStreamMode,
520 : sal_Bool bIsEncrypted,
521 : const OUString& aMediaType )
522 : {
523 37053 : ::osl::MutexGuard aGuard( m_aMutex );
524 :
525 37053 : return new XUnbufferedStream ( m_xContext, aMutexHolder, rEntry, xStream, rData, nStreamMode, bIsEncrypted, aMediaType, bRecoveryMode );
526 : }
527 :
528 5466 : ZipEnumeration * SAL_CALL ZipFile::entries( )
529 : {
530 5466 : return new ZipEnumeration ( aEntries );
531 : }
532 :
533 2900 : uno::Reference< XInputStream > SAL_CALL ZipFile::getInputStream( ZipEntry& rEntry,
534 : const ::rtl::Reference< EncryptionData > &rData,
535 : sal_Bool bIsEncrypted,
536 : SotMutexHolderRef aMutexHolder )
537 : throw(IOException, ZipException, RuntimeException)
538 : {
539 2900 : ::osl::MutexGuard aGuard( m_aMutex );
540 :
541 2900 : if ( rEntry.nOffset <= 0 )
542 2900 : readLOC( rEntry );
543 :
544 : // We want to return a rawStream if we either don't have a key or if the
545 : // key is wrong
546 :
547 2900 : sal_Bool bNeedRawStream = rEntry.nMethod == STORED;
548 :
549 : // if we have a digest, then this file is an encrypted one and we should
550 : // check if we can decrypt it or not
551 2900 : if ( bIsEncrypted && rData.is() && rData->m_aDigest.getLength() )
552 0 : bNeedRawStream = !hasValidPassword ( rEntry, rData );
553 :
554 : return createUnbufferedStream ( aMutexHolder,
555 : rEntry,
556 : rData,
557 : bNeedRawStream ? UNBUFF_STREAM_RAW : UNBUFF_STREAM_DATA,
558 2900 : bIsEncrypted );
559 : }
560 :
561 34021 : uno::Reference< XInputStream > SAL_CALL ZipFile::getDataStream( ZipEntry& rEntry,
562 : const ::rtl::Reference< EncryptionData > &rData,
563 : sal_Bool bIsEncrypted,
564 : SotMutexHolderRef aMutexHolder )
565 : throw ( packages::WrongPasswordException,
566 : IOException,
567 : ZipException,
568 : RuntimeException )
569 : {
570 34021 : ::osl::MutexGuard aGuard( m_aMutex );
571 :
572 34021 : if ( rEntry.nOffset <= 0 )
573 24875 : readLOC( rEntry );
574 :
575 : // An exception must be thrown in case stream is encrypted and
576 : // there is no key or the key is wrong
577 34021 : sal_Bool bNeedRawStream = sal_False;
578 34021 : if ( bIsEncrypted )
579 : {
580 : // in case no digest is provided there is no way
581 : // to detect password correctness
582 21 : if ( !rData.is() )
583 : throw ZipException("Encrypted stream without encryption data!\n",
584 0 : uno::Reference< XInterface >() );
585 :
586 : // if we have a digest, then this file is an encrypted one and we should
587 : // check if we can decrypt it or not
588 : OSL_ENSURE( rData->m_aDigest.getLength(), "Can't detect password correctness without digest!\n" );
589 21 : if ( rData->m_aDigest.getLength() && !hasValidPassword ( rEntry, rData ) )
590 4 : throw packages::WrongPasswordException(THROW_WHERE, uno::Reference< uno::XInterface >() );
591 : }
592 : else
593 34000 : bNeedRawStream = ( rEntry.nMethod == STORED );
594 :
595 : return createUnbufferedStream ( aMutexHolder,
596 : rEntry,
597 : rData,
598 : bNeedRawStream ? UNBUFF_STREAM_RAW : UNBUFF_STREAM_DATA,
599 34017 : bIsEncrypted );
600 : }
601 :
602 136 : uno::Reference< XInputStream > SAL_CALL ZipFile::getRawData( ZipEntry& rEntry,
603 : const ::rtl::Reference< EncryptionData >& rData,
604 : sal_Bool bIsEncrypted,
605 : SotMutexHolderRef aMutexHolder )
606 : throw(IOException, ZipException, RuntimeException)
607 : {
608 136 : ::osl::MutexGuard aGuard( m_aMutex );
609 :
610 136 : if ( rEntry.nOffset <= 0 )
611 68 : readLOC( rEntry );
612 :
613 136 : return createUnbufferedStream ( aMutexHolder, rEntry, rData, UNBUFF_STREAM_RAW, bIsEncrypted );
614 : }
615 :
616 0 : uno::Reference< XInputStream > SAL_CALL ZipFile::getWrappedRawStream(
617 : ZipEntry& rEntry,
618 : const ::rtl::Reference< EncryptionData >& rData,
619 : const OUString& aMediaType,
620 : SotMutexHolderRef aMutexHolder )
621 : throw ( packages::NoEncryptionException,
622 : IOException,
623 : ZipException,
624 : RuntimeException )
625 : {
626 0 : ::osl::MutexGuard aGuard( m_aMutex );
627 :
628 0 : if ( !rData.is() )
629 0 : throw packages::NoEncryptionException(THROW_WHERE, uno::Reference< uno::XInterface >() );
630 :
631 0 : if ( rEntry.nOffset <= 0 )
632 0 : readLOC( rEntry );
633 :
634 0 : return createUnbufferedStream ( aMutexHolder, rEntry, rData, UNBUFF_STREAM_WRAPPEDRAW, sal_True, aMediaType );
635 : }
636 :
637 27843 : sal_Bool ZipFile::readLOC( ZipEntry &rEntry )
638 : throw(IOException, ZipException, RuntimeException)
639 : {
640 27843 : ::osl::MutexGuard aGuard( m_aMutex );
641 :
642 : sal_Int32 nTestSig, nTime, nCRC, nSize, nCompressedSize;
643 : sal_Int16 nVersion, nFlag, nHow, nPathLen, nExtraLen;
644 27843 : sal_Int64 nPos = -rEntry.nOffset;
645 :
646 27843 : aGrabber.seek(nPos);
647 27843 : aGrabber >> nTestSig;
648 :
649 27843 : if (nTestSig != LOCSIG)
650 0 : throw ZipIOException("Invalid LOC header (bad signature)", uno::Reference < XInterface > () );
651 27843 : aGrabber >> nVersion;
652 27843 : aGrabber >> nFlag;
653 27843 : aGrabber >> nHow;
654 27843 : aGrabber >> nTime;
655 27843 : aGrabber >> nCRC;
656 27843 : aGrabber >> nCompressedSize;
657 27843 : aGrabber >> nSize;
658 27843 : aGrabber >> nPathLen;
659 27843 : aGrabber >> nExtraLen;
660 27843 : rEntry.nOffset = aGrabber.getPosition() + nPathLen + nExtraLen;
661 :
662 : // FIXME64: need to read 64bit LOC
663 :
664 27843 : sal_Bool bBroken = sal_False;
665 :
666 : try
667 : {
668 : // read always in UTF8, some tools seem not to set UTF8 bit
669 27843 : uno::Sequence < sal_Int8 > aNameBuffer( nPathLen );
670 27843 : sal_Int32 nRead = aGrabber.readBytes( aNameBuffer, nPathLen );
671 27843 : if ( nRead < aNameBuffer.getLength() )
672 0 : aNameBuffer.realloc( nRead );
673 :
674 27843 : OUString sLOCPath = OUString::intern( (sal_Char *) aNameBuffer.getArray(),
675 : aNameBuffer.getLength(),
676 83529 : RTL_TEXTENCODING_UTF8 );
677 :
678 27843 : if ( rEntry.nPathLen == -1 ) // the file was created
679 : {
680 0 : rEntry.nPathLen = nPathLen;
681 0 : rEntry.sPath = sLOCPath;
682 : }
683 :
684 : // check basic local file header / entry consistency, just
685 : // plain ignore bits 1 & 2 of the flag field - they are either
686 : // purely informative, or even fully undefined (depending on
687 : // nMethod)
688 : // Do *not* compare nMethod / nHow, older versions with
689 : // encrypted streams write mismatching DEFLATE/STORE pairs
690 : // there.
691 : // Do *not* compare timestamps, since MSO 2010 can produce documents
692 : // with timestamp difference in the central directory entry and local
693 : // file header.
694 27843 : bBroken = rEntry.nVersion != nVersion
695 27843 : || rEntry.nPathLen != nPathLen
696 83529 : || !rEntry.sPath.equals( sLOCPath );
697 : }
698 0 : catch(...)
699 : {
700 0 : bBroken = sal_True;
701 : }
702 :
703 27843 : if ( bBroken && !bRecoveryMode )
704 : throw ZipIOException("The stream seems to be broken!",
705 0 : uno::Reference< XInterface >() );
706 :
707 27843 : return sal_True;
708 : }
709 :
710 5733 : sal_Int32 ZipFile::findEND( )
711 : throw(IOException, ZipException, RuntimeException)
712 : {
713 : // this method is called in constructor only, no need for mutex
714 : sal_Int32 nLength, nPos, nEnd;
715 5733 : Sequence < sal_Int8 > aBuffer;
716 : try
717 : {
718 5733 : nLength = static_cast <sal_Int32 > (aGrabber.getLength());
719 5733 : if (nLength == 0 || nLength < ENDHDR)
720 1 : return -1;
721 5732 : nPos = nLength - ENDHDR - ZIP_MAXNAMELEN;
722 5732 : nEnd = nPos >= 0 ? nPos : 0 ;
723 :
724 5732 : aGrabber.seek( nEnd );
725 5732 : aGrabber.readBytes ( aBuffer, nLength - nEnd );
726 :
727 5732 : const sal_Int8 *pBuffer = aBuffer.getConstArray();
728 :
729 5732 : nPos = nLength - nEnd - ENDHDR;
730 15577 : while ( nPos >= 0 )
731 : {
732 9832 : if (pBuffer[nPos] == 'P' && pBuffer[nPos+1] == 'K' && pBuffer[nPos+2] == 5 && pBuffer[nPos+3] == 6 )
733 5719 : return nPos + nEnd;
734 4113 : nPos--;
735 : }
736 : }
737 0 : catch ( IllegalArgumentException& )
738 : {
739 0 : throw ZipException("Zip END signature not found!", uno::Reference < XInterface > () );
740 : }
741 0 : catch ( NotConnectedException& )
742 : {
743 0 : throw ZipException("Zip END signature not found!", uno::Reference < XInterface > () );
744 : }
745 0 : catch ( BufferSizeExceededException& )
746 : {
747 0 : throw ZipException("Zip END signature not found!", uno::Reference < XInterface > () );
748 : }
749 13 : throw ZipException("Zip END signature not found!", uno::Reference < XInterface > () );
750 : }
751 :
752 5733 : sal_Int32 ZipFile::readCEN()
753 : throw(IOException, ZipException, RuntimeException)
754 : {
755 : // this method is called in constructor only, no need for mutex
756 5733 : sal_Int32 nCenLen, nCenPos = -1, nCenOff, nEndPos, nLocPos;
757 : sal_uInt16 nCount, nTotal;
758 :
759 : try
760 : {
761 5733 : nEndPos = findEND();
762 5720 : if (nEndPos == -1)
763 1 : return -1;
764 5719 : aGrabber.seek(nEndPos + ENDTOT);
765 5719 : aGrabber >> nTotal;
766 5719 : aGrabber >> nCenLen;
767 5719 : aGrabber >> nCenOff;
768 :
769 5719 : if ( nTotal * CENHDR > nCenLen )
770 0 : throw ZipException("invalid END header (bad entry count)", uno::Reference < XInterface > () );
771 :
772 5719 : if ( nTotal > ZIP_MAXENTRIES )
773 0 : throw ZipException("too many entries in ZIP File", uno::Reference < XInterface > () );
774 :
775 5719 : if ( nCenLen < 0 || nCenLen > nEndPos )
776 0 : throw ZipException("Invalid END header (bad central directory size)", uno::Reference < XInterface > () );
777 :
778 5719 : nCenPos = nEndPos - nCenLen;
779 :
780 5719 : if ( nCenOff < 0 || nCenOff > nCenPos )
781 0 : throw ZipException("Invalid END header (bad central directory size)", uno::Reference < XInterface > () );
782 :
783 5719 : nLocPos = nCenPos - nCenOff;
784 5719 : aGrabber.seek( nCenPos );
785 5719 : Sequence < sal_Int8 > aCENBuffer ( nCenLen );
786 5719 : sal_Int64 nRead = aGrabber.readBytes ( aCENBuffer, nCenLen );
787 5719 : if ( static_cast < sal_Int64 > ( nCenLen ) != nRead )
788 0 : throw ZipException ("Error reading CEN into memory buffer!", uno::Reference < XInterface > () );
789 :
790 11438 : MemoryByteGrabber aMemGrabber ( aCENBuffer );
791 :
792 11438 : ZipEntry aEntry;
793 : sal_Int32 nTestSig;
794 : sal_Int16 nCommentLen;
795 :
796 359659 : for (nCount = 0 ; nCount < nTotal; nCount++)
797 : {
798 353940 : aMemGrabber >> nTestSig;
799 353940 : if ( nTestSig != CENSIG )
800 0 : throw ZipException("Invalid CEN header (bad signature)", uno::Reference < XInterface > () );
801 :
802 353940 : aMemGrabber.skipBytes ( 2 );
803 353940 : aMemGrabber >> aEntry.nVersion;
804 :
805 353940 : if ( ( aEntry.nVersion & 1 ) == 1 )
806 0 : throw ZipException("Invalid CEN header (encrypted entry)", uno::Reference < XInterface > () );
807 :
808 353940 : aMemGrabber >> aEntry.nFlag;
809 353940 : aMemGrabber >> aEntry.nMethod;
810 :
811 353940 : if ( aEntry.nMethod != STORED && aEntry.nMethod != DEFLATED)
812 0 : throw ZipException("Invalid CEN header (bad compression method)", uno::Reference < XInterface > () );
813 :
814 353940 : aMemGrabber >> aEntry.nTime;
815 353940 : aMemGrabber >> aEntry.nCrc;
816 :
817 : sal_uInt32 nCompressedSize, nSize, nOffset;
818 :
819 353940 : aMemGrabber >> nCompressedSize;
820 353940 : aMemGrabber >> nSize;
821 353940 : aMemGrabber >> aEntry.nPathLen;
822 353940 : aMemGrabber >> aEntry.nExtraLen;
823 353940 : aMemGrabber >> nCommentLen;
824 353940 : aMemGrabber.skipBytes ( 8 );
825 353940 : aMemGrabber >> nOffset;
826 :
827 : // FIXME64: need to read the 64bit header instead
828 707880 : if ( nSize == 0xffffffff ||
829 707880 : nOffset == 0xffffffff ||
830 353940 : nCompressedSize == 0xffffffff ) {
831 0 : throw ZipException("PK64 zip file entry", uno::Reference < XInterface > () );
832 : } else {
833 353940 : aEntry.nCompressedSize = nCompressedSize;
834 353940 : aEntry.nSize = nSize;
835 353940 : aEntry.nOffset = nOffset;
836 : }
837 :
838 353940 : aEntry.nOffset += nLocPos;
839 353940 : aEntry.nOffset *= -1;
840 :
841 353940 : if ( aEntry.nPathLen < 0 )
842 0 : throw ZipException("unexpected name length", uno::Reference < XInterface > () );
843 :
844 353940 : if ( nCommentLen < 0 )
845 0 : throw ZipException("unexpected comment length", uno::Reference < XInterface > () );
846 :
847 353940 : if ( aEntry.nExtraLen < 0 )
848 0 : throw ZipException("unexpected extra header info length", uno::Reference < XInterface > () );
849 :
850 : // read always in UTF8, some tools seem not to set UTF8 bit
851 707880 : aEntry.sPath = OUString::intern ( (sal_Char *) aMemGrabber.getCurrentPos(),
852 : aEntry.nPathLen,
853 353940 : RTL_TEXTENCODING_UTF8 );
854 :
855 353940 : if ( !::comphelper::OStorageHelper::IsValidZipEntryFileName( aEntry.sPath, true ) )
856 0 : throw ZipException("Zip entry has an invalid name.", uno::Reference < XInterface > () );
857 :
858 353940 : aMemGrabber.skipBytes( aEntry.nPathLen + aEntry.nExtraLen + nCommentLen );
859 353940 : aEntries[aEntry.sPath] = aEntry;
860 : }
861 :
862 5719 : if (nCount != nTotal)
863 5719 : throw ZipException("Count != Total", uno::Reference < XInterface > () );
864 : }
865 0 : catch ( IllegalArgumentException & )
866 : {
867 : // seek can throw this...
868 0 : nCenPos = -1; // make sure we return -1 to indicate an error
869 : }
870 5719 : return nCenPos;
871 : }
872 :
873 0 : sal_Int32 ZipFile::recover()
874 : throw(IOException, ZipException, RuntimeException)
875 : {
876 0 : ::osl::MutexGuard aGuard( m_aMutex );
877 :
878 : sal_Int64 nLength;
879 0 : Sequence < sal_Int8 > aBuffer;
880 :
881 : try
882 : {
883 0 : nLength = aGrabber.getLength();
884 0 : if (nLength == 0 || nLength < ENDHDR)
885 0 : return -1;
886 :
887 0 : aGrabber.seek( 0 );
888 :
889 0 : const sal_Int64 nToRead = 32000;
890 0 : for( sal_Int64 nGenPos = 0; aGrabber.readBytes( aBuffer, nToRead ) && aBuffer.getLength() > 16; )
891 : {
892 0 : const sal_Int8 *pBuffer = aBuffer.getConstArray();
893 0 : sal_Int32 nBufSize = aBuffer.getLength();
894 :
895 0 : sal_Int64 nPos = 0;
896 : // the buffer should contain at least one header,
897 : // or if it is end of the file, at least the postheader with sizes and hash
898 0 : while( nPos < nBufSize - 30
899 0 : || ( nBufSize < nToRead && nPos < nBufSize - 16 ) )
900 :
901 : {
902 0 : if ( nPos < nBufSize - 30 && pBuffer[nPos] == 'P' && pBuffer[nPos+1] == 'K' && pBuffer[nPos+2] == 3 && pBuffer[nPos+3] == 4 )
903 : {
904 0 : ZipEntry aEntry;
905 0 : MemoryByteGrabber aMemGrabber ( Sequence< sal_Int8 >( ((sal_Int8*)(&(pBuffer[nPos+4]))), 26 ) );
906 :
907 0 : aMemGrabber >> aEntry.nVersion;
908 0 : if ( ( aEntry.nVersion & 1 ) != 1 )
909 : {
910 0 : aMemGrabber >> aEntry.nFlag;
911 0 : aMemGrabber >> aEntry.nMethod;
912 :
913 0 : if ( aEntry.nMethod == STORED || aEntry.nMethod == DEFLATED )
914 : {
915 : sal_uInt32 nCompressedSize, nSize;
916 :
917 0 : aMemGrabber >> aEntry.nTime;
918 0 : aMemGrabber >> aEntry.nCrc;
919 0 : aMemGrabber >> nCompressedSize;
920 0 : aMemGrabber >> nSize;
921 0 : aMemGrabber >> aEntry.nPathLen;
922 0 : aMemGrabber >> aEntry.nExtraLen;
923 :
924 : // FIXME64: need to read the 64bit header instead
925 0 : if ( nSize == 0xffffffff ||
926 0 : nCompressedSize == 0xffffffff ) {
927 0 : throw ZipException("PK64 zip file entry", uno::Reference < XInterface > () );
928 : } else {
929 0 : aEntry.nCompressedSize = nCompressedSize;
930 0 : aEntry.nSize = nSize;
931 : }
932 :
933 : sal_Int32 nDescrLength =
934 0 : ( aEntry.nMethod == DEFLATED && ( aEntry.nFlag & 8 ) ) ? 16 : 0;
935 :
936 0 : sal_Int64 nDataSize = ( aEntry.nMethod == DEFLATED ) ? aEntry.nCompressedSize : aEntry.nSize;
937 0 : sal_Int64 nBlockLength = nDataSize + aEntry.nPathLen + aEntry.nExtraLen + 30 + nDescrLength;
938 0 : if ( aEntry.nPathLen >= 0 && aEntry.nExtraLen >= 0
939 0 : && ( nGenPos + nPos + nBlockLength ) <= nLength )
940 : {
941 : // read always in UTF8, some tools seem not to set UTF8 bit
942 0 : if( nPos + 30 + aEntry.nPathLen <= nBufSize )
943 0 : aEntry.sPath = OUString ( (sal_Char *) &pBuffer[nPos + 30],
944 : aEntry.nPathLen,
945 0 : RTL_TEXTENCODING_UTF8 );
946 : else
947 : {
948 0 : Sequence < sal_Int8 > aFileName;
949 0 : aGrabber.seek( nGenPos + nPos + 30 );
950 0 : aGrabber.readBytes( aFileName, aEntry.nPathLen );
951 0 : aEntry.sPath = OUString ( (sal_Char *) aFileName.getArray(),
952 : aFileName.getLength(),
953 0 : RTL_TEXTENCODING_UTF8 );
954 0 : aEntry.nPathLen = static_cast< sal_Int16 >(aFileName.getLength());
955 : }
956 :
957 0 : aEntry.nOffset = nGenPos + nPos + 30 + aEntry.nPathLen + aEntry.nExtraLen;
958 :
959 0 : if ( ( aEntry.nSize || aEntry.nCompressedSize ) && !checkSizeAndCRC( aEntry ) )
960 : {
961 0 : aEntry.nCrc = 0;
962 0 : aEntry.nCompressedSize = 0;
963 0 : aEntry.nSize = 0;
964 : }
965 :
966 0 : if ( aEntries.find( aEntry.sPath ) == aEntries.end() )
967 0 : aEntries[aEntry.sPath] = aEntry;
968 : }
969 : }
970 : }
971 :
972 0 : nPos += 4;
973 : }
974 0 : else if (pBuffer[nPos] == 'P' && pBuffer[nPos+1] == 'K' && pBuffer[nPos+2] == 7 && pBuffer[nPos+3] == 8 )
975 : {
976 : sal_Int32 nCRC32;
977 : sal_uInt32 nCompressedSize32, nSize32;
978 : sal_Int64 nCompressedSize, nSize;
979 0 : MemoryByteGrabber aMemGrabber ( Sequence< sal_Int8 >( ((sal_Int8*)(&(pBuffer[nPos+4]))), 12 ) );
980 0 : aMemGrabber >> nCRC32;
981 0 : aMemGrabber >> nCompressedSize32;
982 0 : aMemGrabber >> nSize32;
983 :
984 : // FIXME64: work to be done here ...
985 0 : nCompressedSize = nCompressedSize32;
986 0 : nSize = nSize32;
987 :
988 0 : for( EntryHash::iterator aIter = aEntries.begin(); aIter != aEntries.end(); ++aIter )
989 : {
990 0 : ZipEntry aTmp = (*aIter).second;
991 :
992 : // this is a broken package, accept this block not only for DEFLATED streams
993 0 : if( (*aIter).second.nFlag & 8 )
994 : {
995 0 : sal_Int64 nStreamOffset = nGenPos + nPos - nCompressedSize;
996 0 : if ( nStreamOffset == (*aIter).second.nOffset && nCompressedSize > (*aIter).second.nCompressedSize )
997 : {
998 : // only DEFLATED blocks need to be checked
999 0 : sal_Bool bAcceptBlock = ( (*aIter).second.nMethod == STORED && nCompressedSize == nSize );
1000 :
1001 0 : if ( !bAcceptBlock )
1002 : {
1003 0 : sal_Int64 nRealSize = 0;
1004 0 : sal_Int32 nRealCRC = 0;
1005 0 : getSizeAndCRC( nStreamOffset, nCompressedSize, &nRealSize, &nRealCRC );
1006 0 : bAcceptBlock = ( nRealSize == nSize && nRealCRC == nCRC32 );
1007 : }
1008 :
1009 0 : if ( bAcceptBlock )
1010 : {
1011 0 : (*aIter).second.nCrc = nCRC32;
1012 0 : (*aIter).second.nCompressedSize = nCompressedSize;
1013 0 : (*aIter).second.nSize = nSize;
1014 : }
1015 : }
1016 : #if 0
1017 : // for now ignore clearly broken streams
1018 : else if( !(*aIter).second.nCompressedSize )
1019 : {
1020 : (*aIter).second.nCrc = nCRC32;
1021 : sal_Int32 nRealStreamSize = nGenPos + nPos - (*aIter).second.nOffset;
1022 : (*aIter).second.nCompressedSize = nGenPos + nPos - (*aIter).second.nOffset;
1023 : (*aIter).second.nSize = nSize;
1024 : }
1025 : #endif
1026 : }
1027 0 : }
1028 :
1029 0 : nPos += 4;
1030 : }
1031 : else
1032 0 : nPos++;
1033 : }
1034 :
1035 0 : nGenPos += nPos;
1036 0 : aGrabber.seek( nGenPos );
1037 : }
1038 :
1039 0 : return 0;
1040 : }
1041 0 : catch ( IllegalArgumentException& )
1042 : {
1043 0 : throw ZipException("Zip END signature not found!", uno::Reference < XInterface > () );
1044 : }
1045 0 : catch ( NotConnectedException& )
1046 : {
1047 0 : throw ZipException("Zip END signature not found!", uno::Reference < XInterface > () );
1048 : }
1049 0 : catch ( BufferSizeExceededException& )
1050 : {
1051 0 : throw ZipException("Zip END signature not found!", uno::Reference < XInterface > () );
1052 0 : }
1053 : }
1054 :
1055 0 : sal_Bool ZipFile::checkSizeAndCRC( const ZipEntry& aEntry )
1056 : {
1057 0 : ::osl::MutexGuard aGuard( m_aMutex );
1058 :
1059 0 : sal_Int32 nCRC = 0;
1060 0 : sal_Int64 nSize = 0;
1061 :
1062 0 : if( aEntry.nMethod == STORED )
1063 0 : return ( getCRC( aEntry.nOffset, aEntry.nSize ) == aEntry.nCrc );
1064 :
1065 0 : getSizeAndCRC( aEntry.nOffset, aEntry.nCompressedSize, &nSize, &nCRC );
1066 0 : return ( aEntry.nSize == nSize && aEntry.nCrc == nCRC );
1067 : }
1068 :
1069 0 : sal_Int32 ZipFile::getCRC( sal_Int64 nOffset, sal_Int64 nSize )
1070 : {
1071 0 : ::osl::MutexGuard aGuard( m_aMutex );
1072 :
1073 0 : Sequence < sal_Int8 > aBuffer;
1074 0 : CRC32 aCRC;
1075 0 : sal_Int64 nBlockSize = ::std::min(nSize, static_cast< sal_Int64 >(32000));
1076 :
1077 0 : aGrabber.seek( nOffset );
1078 0 : for (sal_Int64 ind = 0;
1079 0 : aGrabber.readBytes( aBuffer, nBlockSize ) && ind * nBlockSize < nSize;
1080 : ++ind)
1081 : {
1082 0 : sal_Int64 nLen = ::std::min(nBlockSize, nSize - ind * nBlockSize);
1083 0 : aCRC.updateSegment(aBuffer, 0, static_cast<sal_Int32>(nLen));
1084 : }
1085 :
1086 0 : return aCRC.getValue();
1087 : }
1088 :
1089 0 : void ZipFile::getSizeAndCRC( sal_Int64 nOffset, sal_Int64 nCompressedSize, sal_Int64 *nSize, sal_Int32 *nCRC )
1090 : {
1091 0 : ::osl::MutexGuard aGuard( m_aMutex );
1092 :
1093 0 : Sequence < sal_Int8 > aBuffer;
1094 0 : CRC32 aCRC;
1095 0 : sal_Int64 nRealSize = 0;
1096 0 : Inflater aInflaterLocal( true );
1097 0 : sal_Int32 nBlockSize = static_cast< sal_Int32 > (::std::min( nCompressedSize, static_cast< sal_Int64 >( 32000 ) ) );
1098 :
1099 0 : aGrabber.seek( nOffset );
1100 0 : for ( int ind = 0;
1101 0 : !aInflaterLocal.finished() && aGrabber.readBytes( aBuffer, nBlockSize ) && ind * nBlockSize < nCompressedSize;
1102 : ind++ )
1103 : {
1104 0 : Sequence < sal_Int8 > aData( nBlockSize );
1105 0 : sal_Int32 nLastInflated = 0;
1106 0 : sal_Int64 nInBlock = 0;
1107 :
1108 0 : aInflaterLocal.setInput( aBuffer );
1109 0 : do
1110 : {
1111 0 : nLastInflated = aInflaterLocal.doInflateSegment( aData, 0, nBlockSize );
1112 0 : aCRC.updateSegment( aData, 0, nLastInflated );
1113 0 : nInBlock += nLastInflated;
1114 0 : } while( !aInflater.finished() && nLastInflated );
1115 :
1116 0 : nRealSize += nInBlock;
1117 0 : }
1118 :
1119 0 : *nSize = nRealSize;
1120 0 : *nCRC = aCRC.getValue();
1121 0 : }
1122 :
1123 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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