1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
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6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
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11 * http://www.apache.org/licenses/LICENSE-2.0
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14 * software distributed under the License is distributed on an
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21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_comphelper.hxx"
26
27 #include "comphelper/docpasswordhelper.hxx"
28 #include <com/sun/star/task/XInteractionHandler.hpp>
29 #include "comphelper/mediadescriptor.hxx"
30
31 #include <osl/time.h>
32 #include <rtl/digest.h>
33 #include <rtl/random.h>
34
35 using ::rtl::OUString;
36 using ::com::sun::star::uno::Sequence;
37 using ::com::sun::star::uno::Exception;
38 using ::com::sun::star::uno::Reference;
39 using ::com::sun::star::uno::UNO_SET_THROW;
40 using ::com::sun::star::task::PasswordRequestMode;
41 using ::com::sun::star::task::PasswordRequestMode_PASSWORD_ENTER;
42 using ::com::sun::star::task::PasswordRequestMode_PASSWORD_REENTER;
43 using ::com::sun::star::task::XInteractionHandler;
44 using ::com::sun::star::task::XInteractionRequest;
45
46 using namespace ::com::sun::star;
47
48 namespace comphelper {
49
50 // ============================================================================
51
GeneratePBKDF2Hash(const::rtl::OUString & aPassword,const uno::Sequence<sal_Int8> & aSalt,sal_Int32 nCount,sal_Int32 nHashLength)52 static uno::Sequence< sal_Int8 > GeneratePBKDF2Hash( const ::rtl::OUString& aPassword, const uno::Sequence< sal_Int8 >& aSalt, sal_Int32 nCount, sal_Int32 nHashLength )
53 {
54 uno::Sequence< sal_Int8 > aResult;
55
56 if ( !aPassword.isEmpty() && aSalt.getLength() && nCount && nHashLength )
57 {
58 ::rtl::OString aBytePass = ::rtl::OUStringToOString( aPassword, RTL_TEXTENCODING_UTF8 );
59 aResult.realloc( 16 );
60 rtl_digest_PBKDF2( reinterpret_cast < sal_uInt8 * > ( aResult.getArray() ),
61 aResult.getLength(),
62 reinterpret_cast < const sal_uInt8 * > ( aBytePass.getStr() ),
63 aBytePass.getLength(),
64 reinterpret_cast < const sal_uInt8 * > ( aSalt.getConstArray() ),
65 aSalt.getLength(),
66 nCount );
67 }
68
69 return aResult;
70 }
71
72 // ============================================================================
73
~IDocPasswordVerifier()74 IDocPasswordVerifier::~IDocPasswordVerifier()
75 {
76 }
77
78 // ============================================================================
GenerateNewModifyPasswordInfo(const::rtl::OUString & aPassword)79 uno::Sequence< beans::PropertyValue > DocPasswordHelper::GenerateNewModifyPasswordInfo( const ::rtl::OUString& aPassword )
80 {
81 uno::Sequence< beans::PropertyValue > aResult;
82
83 uno::Sequence< sal_Int8 > aSalt = GenerateRandomByteSequence( 16 );
84 sal_Int32 nCount = 1024;
85
86 uno::Sequence< sal_Int8 > aNewHash = GeneratePBKDF2Hash( aPassword, aSalt, nCount, 16 );
87 if ( aNewHash.getLength() )
88 {
89 aResult.realloc( 4 );
90 aResult[0].Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "algorithm-name" ) );
91 aResult[0].Value <<= ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "PBKDF2" ) );
92 aResult[1].Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "salt" ) );
93 aResult[1].Value <<= aSalt;
94 aResult[2].Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "iteration-count" ) );
95 aResult[2].Value <<= nCount;
96 aResult[3].Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "hash" ) );
97 aResult[3].Value <<= aNewHash;
98 }
99
100 return aResult;
101 }
102
103 // ============================================================================
IsModifyPasswordCorrect(const::rtl::OUString & aPassword,const uno::Sequence<beans::PropertyValue> & aInfo)104 sal_Bool DocPasswordHelper::IsModifyPasswordCorrect( const ::rtl::OUString& aPassword, const uno::Sequence< beans::PropertyValue >& aInfo )
105 {
106 sal_Bool bResult = sal_False;
107 if ( !aPassword.isEmpty() && aInfo.getLength() )
108 {
109 ::rtl::OUString sAlgorithm;
110 uno::Sequence< sal_Int8 > aSalt;
111 uno::Sequence< sal_Int8 > aHash;
112 sal_Int32 nCount = 0;
113
114 for ( sal_Int32 nInd = 0; nInd < aInfo.getLength(); nInd++ )
115 {
116 if ( aInfo[nInd].Name.equals( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "algorithm-name" ) ) ) )
117 aInfo[nInd].Value >>= sAlgorithm;
118 else if ( aInfo[nInd].Name.equals( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "salt" ) ) ) )
119 aInfo[nInd].Value >>= aSalt;
120 else if ( aInfo[nInd].Name.equals( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "iteration-count" ) ) ) )
121 aInfo[nInd].Value >>= nCount;
122 else if ( aInfo[nInd].Name.equals( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "hash" ) ) ) )
123 aInfo[nInd].Value >>= aHash;
124 }
125
126 if ( sAlgorithm.equals( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "PBKDF2" ) ) )
127 && aSalt.getLength() && nCount > 0 && aHash.getLength() )
128 {
129 uno::Sequence< sal_Int8 > aNewHash = GeneratePBKDF2Hash( aPassword, aSalt, nCount, aHash.getLength() );
130 for ( sal_Int32 nInd = 0; nInd < aNewHash.getLength() && nInd < aHash.getLength() && aNewHash[nInd] == aHash[nInd]; nInd ++ )
131 {
132 if ( nInd == aNewHash.getLength() - 1 && nInd == aHash.getLength() - 1 )
133 bResult = sal_True;
134 }
135 }
136 }
137
138 return bResult;
139 }
140
141 // ============================================================================
GetWordHashAsUINT32(const::rtl::OUString & aUString)142 sal_uInt32 DocPasswordHelper::GetWordHashAsUINT32(
143 const ::rtl::OUString& aUString )
144 {
145 static sal_uInt16 pInitialCode[] = {
146 0xE1F0, // 1
147 0x1D0F, // 2
148 0xCC9C, // 3
149 0x84C0, // 4
150 0x110C, // 5
151 0x0E10, // 6
152 0xF1CE, // 7
153 0x313E, // 8
154 0x1872, // 9
155 0xE139, // 10
156 0xD40F, // 11
157 0x84F9, // 12
158 0x280C, // 13
159 0xA96A, // 14
160 0x4EC3 // 15
161 };
162
163 static sal_uInt16 pEncryptionMatrix[15][7] = {
164 { 0xAEFC, 0x4DD9, 0x9BB2, 0x2745, 0x4E8A, 0x9D14, 0x2A09}, // last-14
165 { 0x7B61, 0xF6C2, 0xFDA5, 0xEB6B, 0xC6F7, 0x9DCF, 0x2BBF}, // last-13
166 { 0x4563, 0x8AC6, 0x05AD, 0x0B5A, 0x16B4, 0x2D68, 0x5AD0}, // last-12
167 { 0x0375, 0x06EA, 0x0DD4, 0x1BA8, 0x3750, 0x6EA0, 0xDD40}, // last-11
168 { 0xD849, 0xA0B3, 0x5147, 0xA28E, 0x553D, 0xAA7A, 0x44D5}, // last-10
169 { 0x6F45, 0xDE8A, 0xAD35, 0x4A4B, 0x9496, 0x390D, 0x721A}, // last-9
170 { 0xEB23, 0xC667, 0x9CEF, 0x29FF, 0x53FE, 0xA7FC, 0x5FD9}, // last-8
171 { 0x47D3, 0x8FA6, 0x8FA6, 0x1EDA, 0x3DB4, 0x7B68, 0xF6D0}, // last-7
172 { 0xB861, 0x60E3, 0xC1C6, 0x93AD, 0x377B, 0x6EF6, 0xDDEC}, // last-6
173 { 0x45A0, 0x8B40, 0x06A1, 0x0D42, 0x1A84, 0x3508, 0x6A10}, // last-5
174 { 0xAA51, 0x4483, 0x8906, 0x022D, 0x045A, 0x08B4, 0x1168}, // last-4
175 { 0x76B4, 0xED68, 0xCAF1, 0x85C3, 0x1BA7, 0x374E, 0x6E9C}, // last-3
176 { 0x3730, 0x6E60, 0xDCC0, 0xA9A1, 0x4363, 0x86C6, 0x1DAD}, // last-2
177 { 0x3331, 0x6662, 0xCCC4, 0x89A9, 0x0373, 0x06E6, 0x0DCC}, // last-1
178 { 0x1021, 0x2042, 0x4084, 0x8108, 0x1231, 0x2462, 0x48C4} // last
179 };
180
181 sal_uInt32 nResult = 0;
182 sal_uInt32 nLen = aUString.getLength();
183
184 if ( nLen )
185 {
186 if ( nLen > 15 )
187 nLen = 15;
188
189 sal_uInt16 nHighResult = pInitialCode[nLen - 1];
190 sal_uInt16 nLowResult = 0;
191
192 const sal_Unicode* pStr = aUString.getStr();
193 for ( sal_uInt32 nInd = 0; nInd < nLen; nInd++ )
194 {
195 // NO Encoding during conversion!
196 // The specification says that the low byte should be used in case it is not NULL
197 char nHighChar = (char)( pStr[nInd] >> 8 );
198 char nLowChar = (char)( pStr[nInd] & 0xFF );
199 char nChar = nLowChar ? nLowChar : nHighChar;
200
201 for ( int nMatrixInd = 0; nMatrixInd < 7; ++nMatrixInd )
202 {
203 if ( ( nChar & ( 1 << nMatrixInd ) ) != 0 )
204 nHighResult = nHighResult ^ pEncryptionMatrix[15 - nLen + nInd][nMatrixInd];
205 }
206
207 nLowResult = ( ( ( nLowResult >> 14 ) & 0x0001 ) | ( ( nLowResult << 1 ) & 0x7FFF ) ) ^ nChar;
208 }
209
210 nLowResult = (sal_uInt16)( ( ( ( nLowResult >> 14 ) & 0x001 ) | ( ( nLowResult << 1 ) & 0x7FF ) ) ^ nLen ^ 0xCE4B );
211
212 nResult = ( nHighResult << 16 ) | nLowResult;
213 }
214
215 return nResult;
216 }
217
218 // ============================================================================
GetWordHashAsSequence(const::rtl::OUString & aUString)219 Sequence< sal_Int8 > DocPasswordHelper::GetWordHashAsSequence(
220 const ::rtl::OUString& aUString )
221 {
222 sal_uInt32 nHash = GetWordHashAsUINT32( aUString );
223 Sequence< sal_Int8 > aResult( 4 );
224 aResult[0] = ( nHash >> 24 );
225 aResult[1] = ( ( nHash >> 16 ) & 0xFF );
226 aResult[2] = ( ( nHash >> 8 ) & 0xFF );
227 aResult[3] = ( nHash & 0xFF );
228
229 return aResult;
230 }
231
232 // ============================================================================
GetXLHashAsUINT16(const::rtl::OUString & aUString,rtl_TextEncoding nEnc)233 sal_uInt16 DocPasswordHelper::GetXLHashAsUINT16(
234 const ::rtl::OUString& aUString,
235 rtl_TextEncoding nEnc )
236 {
237 sal_uInt16 nResult = 0;
238
239 ::rtl::OString aString = ::rtl::OUStringToOString( aUString, nEnc );
240
241 if ( !aString.isEmpty() && aString.getLength() <= SAL_MAX_UINT16 )
242 {
243 for ( sal_Int32 nInd = aString.getLength() - 1; nInd >= 0; nInd-- )
244 {
245 nResult = ( ( nResult >> 14 ) & 0x01 ) | ( ( nResult << 1 ) & 0x7FFF );
246 nResult ^= aString.getStr()[nInd];
247 }
248
249 nResult = ( ( nResult >> 14 ) & 0x01 ) | ( ( nResult << 1 ) & 0x7FFF );
250 nResult ^= ( 0x8000 | ( 'N' << 8 ) | 'K' );
251 nResult ^= aString.getLength();
252 }
253
254 return nResult;
255 }
256
257 // ============================================================================
GetXLHashAsSequence(const::rtl::OUString & aUString,rtl_TextEncoding nEnc)258 Sequence< sal_Int8 > DocPasswordHelper::GetXLHashAsSequence(
259 const ::rtl::OUString& aUString,
260 rtl_TextEncoding nEnc )
261 {
262 sal_uInt16 nHash = GetXLHashAsUINT16( aUString, nEnc );
263 Sequence< sal_Int8 > aResult( 2 );
264 aResult[0] = ( nHash >> 8 );
265 aResult[1] = ( nHash & 0xFF );
266
267 return aResult;
268 }
269
270 // ============================================================================
GenerateRandomByteSequence(sal_Int32 nLength)271 /*static*/ uno::Sequence< sal_Int8 > DocPasswordHelper::GenerateRandomByteSequence( sal_Int32 nLength )
272 {
273 uno::Sequence< sal_Int8 > aResult( nLength );
274
275 TimeValue aTime;
276 osl_getSystemTime( &aTime );
277 rtlRandomPool aRandomPool = rtl_random_createPool ();
278 rtl_random_addBytes ( aRandomPool, &aTime, 8 );
279 rtl_random_getBytes ( aRandomPool, aResult.getArray(), nLength );
280 rtl_random_destroyPool ( aRandomPool );
281
282 return aResult;
283 }
284
285
286 // ============================================================================
GenerateStd97Key(const::rtl::OUString & aPassword,const uno::Sequence<sal_Int8> & aDocId)287 /*static*/ uno::Sequence< sal_Int8 > DocPasswordHelper::GenerateStd97Key( const ::rtl::OUString& aPassword, const uno::Sequence< sal_Int8 >& aDocId )
288 {
289 uno::Sequence< sal_Int8 > aResultKey;
290 if ( !aPassword.isEmpty() && aDocId.getLength() == 16 )
291 {
292 sal_uInt16 pPassData[16];
293 rtl_zeroMemory( pPassData, sizeof(pPassData) );
294
295 sal_Int32 nPassLen = ::std::min< sal_Int32 >( aPassword.getLength(), 15 );
296 rtl_copyMemory( pPassData, aPassword.getStr(), nPassLen * sizeof(pPassData[0]) );
297
298 aResultKey = GenerateStd97Key( pPassData, aDocId );
299 }
300
301 return aResultKey;
302 }
303
304 // ============================================================================
GenerateStd97Key(const sal_uInt16 pPassData[16],const uno::Sequence<sal_Int8> & aDocId)305 /*static*/ uno::Sequence< sal_Int8 > DocPasswordHelper::GenerateStd97Key( const sal_uInt16 pPassData[16], const uno::Sequence< sal_Int8 >& aDocId )
306 {
307 uno::Sequence< sal_Int8 > aResultKey;
308 if ( pPassData[0] && aDocId.getLength() == 16 )
309 {
310 sal_uInt8 pKeyData[64];
311 rtl_zeroMemory( pKeyData, sizeof(pKeyData) );
312
313 sal_Int32 nInd = 0;
314
315 // Fill PassData into KeyData.
316 for ( nInd = 0; nInd < 16 && pPassData[nInd]; nInd++)
317 {
318 pKeyData[2*nInd] = sal::static_int_cast< sal_uInt8 >( (pPassData[nInd] >> 0) & 0xff );
319 pKeyData[2*nInd + 1] = sal::static_int_cast< sal_uInt8 >( (pPassData[nInd] >> 8) & 0xff );
320 }
321
322 pKeyData[2*nInd] = 0x80;
323 pKeyData[56] = sal::static_int_cast< sal_uInt8 >( nInd << 4 );
324
325 // Fill raw digest of KeyData into KeyData.
326 rtlDigest hDigest = rtl_digest_create ( rtl_Digest_AlgorithmMD5 );
327 (void)rtl_digest_updateMD5 (
328 hDigest, pKeyData, sizeof(pKeyData));
329 (void)rtl_digest_rawMD5 (
330 hDigest, pKeyData, RTL_DIGEST_LENGTH_MD5);
331
332 // Update digest with KeyData and Unique.
333 for ( nInd = 0; nInd < 16; nInd++ )
334 {
335 rtl_digest_updateMD5( hDigest, pKeyData, 5 );
336 rtl_digest_updateMD5( hDigest, (const sal_uInt8*)aDocId.getConstArray(), aDocId.getLength() );
337 }
338
339 // Update digest with padding.
340 pKeyData[16] = 0x80;
341 rtl_zeroMemory( pKeyData + 17, sizeof(pKeyData) - 17 );
342 pKeyData[56] = 0x80;
343 pKeyData[57] = 0x0a;
344
345 rtl_digest_updateMD5( hDigest, &(pKeyData[16]), sizeof(pKeyData) - 16 );
346
347 // Fill raw digest of above updates
348 aResultKey.realloc( RTL_DIGEST_LENGTH_MD5 );
349 rtl_digest_rawMD5 ( hDigest, (sal_uInt8*)aResultKey.getArray(), aResultKey.getLength() );
350
351 // Erase KeyData array and leave.
352 rtl_zeroMemory( pKeyData, sizeof(pKeyData) );
353 }
354
355 return aResultKey;
356 }
357
358 // ============================================================================
359
requestAndVerifyDocPassword(IDocPasswordVerifier & rVerifier,const::com::sun::star::uno::Sequence<::com::sun::star::beans::NamedValue> & rMediaEncData,const OUString & rMediaPassword,const Reference<XInteractionHandler> & rxInteractHandler,const OUString & rDocumentName,DocPasswordRequestType eRequestType,const::std::vector<OUString> * pDefaultPasswords,bool * pbIsDefaultPassword)360 /*static*/ ::com::sun::star::uno::Sequence< ::com::sun::star::beans::NamedValue > DocPasswordHelper::requestAndVerifyDocPassword(
361 IDocPasswordVerifier& rVerifier,
362 const ::com::sun::star::uno::Sequence< ::com::sun::star::beans::NamedValue >& rMediaEncData,
363 const OUString& rMediaPassword,
364 const Reference< XInteractionHandler >& rxInteractHandler,
365 const OUString& rDocumentName,
366 DocPasswordRequestType eRequestType,
367 const ::std::vector< OUString >* pDefaultPasswords,
368 bool* pbIsDefaultPassword )
369 {
370 ::com::sun::star::uno::Sequence< ::com::sun::star::beans::NamedValue > aEncData;
371 DocPasswordVerifierResult eResult = DocPasswordVerifierResult_WRONG_PASSWORD;
372
373 // first, try provided default passwords
374 if( pbIsDefaultPassword )
375 *pbIsDefaultPassword = false;
376 if( pDefaultPasswords )
377 {
378 for( ::std::vector< OUString >::const_iterator aIt = pDefaultPasswords->begin(), aEnd = pDefaultPasswords->end(); (eResult == DocPasswordVerifierResult_WRONG_PASSWORD) && (aIt != aEnd); ++aIt )
379 {
380 OSL_ENSURE( !aIt->isEmpty(), "DocPasswordHelper::requestAndVerifyDocPassword - unexpected empty default password" );
381 if( !aIt->isEmpty() )
382 {
383 eResult = rVerifier.verifyPassword( *aIt, aEncData );
384 if( pbIsDefaultPassword )
385 *pbIsDefaultPassword = eResult == DocPasswordVerifierResult_OK;
386 }
387 }
388 }
389
390 // try media encryption data (skip, if result is OK or ABORT)
391 if( eResult == DocPasswordVerifierResult_WRONG_PASSWORD )
392 {
393 if( rMediaEncData.getLength() > 0 )
394 {
395 eResult = rVerifier.verifyEncryptionData( rMediaEncData );
396 if( eResult == DocPasswordVerifierResult_OK )
397 aEncData = rMediaEncData;
398 }
399 }
400
401 // try media password (skip, if result is OK or ABORT)
402 if( eResult == DocPasswordVerifierResult_WRONG_PASSWORD )
403 {
404 if( !rMediaPassword.isEmpty() )
405 eResult = rVerifier.verifyPassword( rMediaPassword, aEncData );
406 }
407
408 // request a password (skip, if result is OK or ABORT)
409 if( (eResult == DocPasswordVerifierResult_WRONG_PASSWORD) && rxInteractHandler.is() ) try
410 {
411 PasswordRequestMode eRequestMode = PasswordRequestMode_PASSWORD_ENTER;
412 while( eResult == DocPasswordVerifierResult_WRONG_PASSWORD )
413 {
414 DocPasswordRequest* pRequest = new DocPasswordRequest( eRequestType, eRequestMode, rDocumentName );
415 Reference< XInteractionRequest > xRequest( pRequest );
416 rxInteractHandler->handle( xRequest );
417 if( pRequest->isPassword() )
418 {
419 if( !pRequest->getPassword().isEmpty() )
420 eResult = rVerifier.verifyPassword( pRequest->getPassword(), aEncData );
421 }
422 else
423 {
424 eResult = DocPasswordVerifierResult_ABORT;
425 }
426 eRequestMode = PasswordRequestMode_PASSWORD_REENTER;
427 }
428 }
429 catch( Exception& )
430 {
431 }
432
433 return (eResult == DocPasswordVerifierResult_OK) ? aEncData : uno::Sequence< beans::NamedValue >();
434 }
435
requestAndVerifyDocPassword(IDocPasswordVerifier & rVerifier,MediaDescriptor & rMediaDesc,DocPasswordRequestType eRequestType,const::std::vector<OUString> * pDefaultPasswords)436 /*static*/ ::com::sun::star::uno::Sequence< ::com::sun::star::beans::NamedValue > DocPasswordHelper::requestAndVerifyDocPassword(
437 IDocPasswordVerifier& rVerifier,
438 MediaDescriptor& rMediaDesc,
439 DocPasswordRequestType eRequestType,
440 const ::std::vector< OUString >* pDefaultPasswords )
441 {
442 uno::Sequence< beans::NamedValue > aMediaEncData = rMediaDesc.getUnpackedValueOrDefault(
443 MediaDescriptor::PROP_ENCRYPTIONDATA(), uno::Sequence< beans::NamedValue >() );
444 OUString aMediaPassword = rMediaDesc.getUnpackedValueOrDefault(
445 MediaDescriptor::PROP_PASSWORD(), OUString() );
446 Reference< XInteractionHandler > xInteractHandler = rMediaDesc.getUnpackedValueOrDefault(
447 MediaDescriptor::PROP_INTERACTIONHANDLER(), Reference< XInteractionHandler >() );
448 OUString aDocumentName = rMediaDesc.getUnpackedValueOrDefault(
449 MediaDescriptor::PROP_URL(), OUString() );
450
451 bool bIsDefaultPassword = false;
452 uno::Sequence< beans::NamedValue > aEncryptionData = requestAndVerifyDocPassword(
453 rVerifier, aMediaEncData, aMediaPassword, xInteractHandler, aDocumentName, eRequestType, pDefaultPasswords, &bIsDefaultPassword );
454
455 rMediaDesc.erase( MediaDescriptor::PROP_PASSWORD() );
456 rMediaDesc.erase( MediaDescriptor::PROP_ENCRYPTIONDATA() );
457
458 // insert valid password into media descriptor (but not a default password)
459 if( (aEncryptionData.getLength() > 0) && !bIsDefaultPassword )
460 rMediaDesc[ MediaDescriptor::PROP_ENCRYPTIONDATA() ] <<= aEncryptionData;
461
462 return aEncryptionData;
463 }
464
465 // ============================================================================
466
467 } // namespace comphelper
468
469