fixxxx

1 files changed, 1 insertions, 1 deletions

diff --git a/pwmanager/pwmanager/pwmdoc.cpp b/pwmanager/pwmanager/pwmdoc.cpp
index 36b0df5..1f3c58b 100644
--- a/pwmanager/pwmanager/pwmdoc.cpp
+++ b/pwmanager/pwmanager/pwmdoc.cpp
@@ -55,769 +55,769 @@
 #include <string.h>
 //US#include <iostream>
 #include <algorithm>
 #include <sys/types.h>
 #include <sys/stat.h>
 #ifndef _WIN32_
 #include <unistd.h>
 #include <stdint.h>
 #endif
 
 #ifdef PWM_EMBEDDED
 #ifndef Q_LONG
 #define Q_LONG long
 #endif
 
 #ifndef Q_ULONG
 #define Q_ULONG unsigned long
 #endif
 #endif //PWM_EMBEDDED
 
 
 //TODO: reset to its normal value.
 //LR set to 5 min 
 #define META_CHECK_TIMER_INTERVAL	300 /* 10 300*/ /* sek */
 
 using namespace std;
 
 
 void PwMDocList::add(PwMDoc *doc, const string &id)
 {
 #ifdef PWM_DEBUG
 	// check for existance of object in debug mode only.
 	vector<listItem>::iterator begin = docList.begin(),
 				   end = docList.end(),
 				   i = begin;
 	while (i != end) {
 		if (i->doc == doc) {
 			BUG();
 			return;
 		}
 		++i;
 	}
 #endif
 	listItem newItem;
 	newItem.doc = doc;
 	newItem.docId = id;
 	docList.push_back(newItem);
 }
 
 void PwMDocList::edit(PwMDoc *doc, const string &newId)
 {
 	vector<listItem>::iterator begin = docList.begin(),
 				   end = docList.end(),
 				   i = begin;
 	while (i != end) {
 		if (i->doc == doc) {
 			i->docId = newId;
 			return;
 		}
 		++i;
 	}
 }
 
 void PwMDocList::del(PwMDoc *doc)
 {
 	vector<listItem>::iterator begin = docList.begin(),
 				   end = docList.end(),
 				   i = begin;
 	while (i != end) {
 		if (i->doc == doc) {
 			docList.erase(i);
 			return;
 		}
 		++i;
 	}
 }
 
 bool PwMDocList::find(const string &id, listItem *ret)
 {
 	vector<listItem>::iterator begin = docList.begin(),
 				   end = docList.end(),
 				   i = begin;
 	while (i != end) {
 		if (i->docId == id) {
 			if (ret)
 				*ret = *i;
 			return true;
 		}
 		++i;
 	}
 	return false;
 }
 
 
 
 DocTimer::DocTimer(PwMDoc *_doc)
  : doc (_doc)
  , mpwLock (0)
  , autoLockLock (0)
  , metaCheckLock (0)
 {
 	mpwTimer = new QTimer;
 	autoLockTimer = new QTimer;
 	metaCheckTimer = new QTimer;
 	connect(mpwTimer, SIGNAL(timeout()),
 		this, SLOT(mpwTimeout()));
 	connect(autoLockTimer, SIGNAL(timeout()),
 		this, SLOT(autoLockTimeout()));
 	connect(metaCheckTimer, SIGNAL(timeout()),
 		this, SLOT(metaCheckTimeout()));
 }
 
 DocTimer::~DocTimer()
 {
 	delete mpwTimer;
 	delete autoLockTimer;
 	delete metaCheckTimer;
 }
 
 void DocTimer::start(TimerIDs timer)
 {
 	switch (timer) {
 		case id_mpwTimer:
 			if (mpwTimer->isActive())
 				mpwTimer->stop();
 			doc->setDocStatFlag(DOC_STAT_UNLOCK_WITHOUT_PW);
 			mpwTimer->start(conf()->confGlobPwTimeout() * 1000, true);
 			break;
 		case id_autoLockTimer:
 			if (autoLockTimer->isActive())
 				autoLockTimer->stop();
 			if (conf()->confGlobLockTimeout() > 0)
 				autoLockTimer->start(conf()->confGlobLockTimeout() * 1000, true);
 			break;
 		case id_metaCheckTimer:
 			if (metaCheckTimer->isActive())
 				metaCheckTimer->stop();
 			metaCheckTimer->start(META_CHECK_TIMER_INTERVAL * 1000, true);
 			break;
 	}
 }
 
 void DocTimer::stop(TimerIDs timer)
 {
 	switch (timer) {
 		case id_mpwTimer:
 			mpwTimer->stop();
 			break;
 		case id_autoLockTimer:
 			autoLockTimer->stop();
 			break;
 		case id_metaCheckTimer:
 			metaCheckTimer->stop();
 			break;
 	}
 }
 
 void DocTimer::getLock(TimerIDs timer)
 {
 	switch (timer) {
 		case id_mpwTimer:
 			++mpwLock;
 			break;
 		case id_autoLockTimer:
 			++autoLockLock;
 			break;
 		case id_metaCheckTimer:
 			++metaCheckLock;
 			break;
 	}
 }
 
 void DocTimer::putLock(TimerIDs timer)
 {
 	switch (timer) {
 		case id_mpwTimer:
 			if (mpwLock)
 				--mpwLock;
 			break;
 		case id_autoLockTimer:
 			if (autoLockLock)
 				--autoLockLock;
 			break;
 		case id_metaCheckTimer:
 			if (metaCheckLock)
 				--metaCheckLock;
 			break;
 	}
 }
 
 void DocTimer::mpwTimeout()
 {
 	if (mpwLock) {
 		mpwTimer->start(1000, true);
 		return;
 	}
 	doc->unsetDocStatFlag(DOC_STAT_UNLOCK_WITHOUT_PW);
 }
 
 void DocTimer::autoLockTimeout()
 {
 	if (autoLockLock) {
 		autoLockTimer->start(1000, true);
 		return;
 	}
 	if (conf()->confGlobAutoDeepLock() &&
 	    doc->filename != QString::null &&
 	    doc->filename != "") {
 		doc->deepLock(true);
 	} else {
 		doc->lockAll(true);
 	}
 }
 
 void DocTimer::metaCheckTimeout()
 {
 	if (metaCheckLock) {
 		// check again in one second.
 		metaCheckTimer->start(1000, true);
 		return;
 	}
 	if (doc->isDeepLocked()) {
 		metaCheckTimer->start(META_CHECK_TIMER_INTERVAL * 1000, true);
 		return;
 	}
 	if (doc->isDocEmpty()) {
 		metaCheckTimer->start(META_CHECK_TIMER_INTERVAL * 1000, true);
 		return;
 	}
 #ifdef CONFIG_KWALLETIF
 	KWalletEmu *kwlEmu = doc->init->kwalletEmu();
 	if (kwlEmu)
 		kwlEmu->suspendDocSignals();
 #endif // CONFIG_KWALLETIF
 	/* We simply trigger all views to update their
 	 * displayed values. This way they have a chance
 	 * to get notified when some meta changes over time.
 	 * (for example an entry expired).
 	 * The _view_ is responsive for not updating its
 	 * contents if nothing really changed!
 	 */
 	emit doc->dataChanged(doc);
 #ifdef CONFIG_KWALLETIF
 	if (kwlEmu)
 		kwlEmu->resumeDocSignals();
 #endif // CONFIG_KWALLETIF
 	metaCheckTimer->start(META_CHECK_TIMER_INTERVAL * 1000, true);
 }
 
 
 
 PwMDocList PwMDoc::openDocList;
 unsigned int PwMDocList::unnamedDocCnt = 1;
 
 PwMDoc::PwMDoc(QObject *parent, const char *name)
  : PwMDocUi(parent, name)
  , dataChangedLock (0)
 {
 	deleted = false;
 	unnamedNum = 0;
 	getOpenDocList()->add(this, getTitle().latin1());
 	curDocStat = 0;
 	setMaxNumEntries();
 	_timer = new DocTimer(this);
 	timer()->start(DocTimer::id_mpwTimer);
 	timer()->start(DocTimer::id_autoLockTimer);
 	timer()->start(DocTimer::id_metaCheckTimer);
 	addCategory(DEFAULT_CATEGORY, 0, false);
 	listView = 0;
 	emit docCreated(this);
 }
 
 PwMDoc::~PwMDoc()
 {
 	emit docClosed(this);
 	getOpenDocList()->del(this);
 	delete _timer;
 }
 
 PwMerror PwMDoc::saveDoc(char compress, const QString *file)
 {
 	PwMerror ret, e;
 	string serialized;
 	QFile f;
 	QString tmpFileMoved(QString::null);
 	bool wasDeepLocked;
 	QString savedFilename(filename);
 
 	if (!file) {
 		if (filename == "")
 			return e_filename;
 		if (isDeepLocked()) {
 		  /* We don't need to save any data.
 		   * It's already all on disk, because
 		   * we are deeplocked.
 		   */
 		  unsetDocStatFlag(DOC_STAT_DISK_DIRTY);
 		  ret = e_success;
           return ret;
 		}
  	} else {
 		if (*file == "" && filename == "")
 			return e_filename;
 		if (*file != "")
 			filename = *file;
 	}
 
 	wasDeepLocked = isDeepLocked();
 	if (wasDeepLocked) {
 	  /* We are deeplocked. That means all data is already
 	   * on disk. BUT we need to do saving procedure,
 	   * because *file != savedFilename.
 	   * Additionally we need to tempoarly restore
 	   * the old "filename", because deepLock() references it.
 	   */
 	  QString newFilename(filename);
 	  filename = savedFilename;
 	  getDataChangedLock();
 	  e = deepLock(false);
 	  putDataChangedLock();
 	  filename = newFilename;
 	  switch (e) {
 	     case e_success:
 	       break;
 	     case e_wrongPw:
 	     case e_noPw:
 	       emitDataChanged(this);
 	       return e;
 	     default:
 	       emitDataChanged(this);
 	       return e_openFile;
 	  }
 	}
 
 	if (!isPwAvailable()) {
 		/* password is not available. This means, the
 		 * document wasn't saved, yet.
 		 */
 		bool useChipcard = getDocStatFlag(DOC_STAT_USE_CHIPCARD);
 		QString pw(requestNewMpw(&useChipcard));
 		if (pw != "") {
 			currentPw = pw;
 		} else {
 			return e_noPw;
 		}
 		if (useChipcard) {
 			setDocStatFlag(DOC_STAT_USE_CHIPCARD);
 		} else {
 			unsetDocStatFlag(DOC_STAT_USE_CHIPCARD);
 		}
 	}
 
 	int _cryptAlgo = conf()->confGlobCryptAlgo();
 	int _hashAlgo = conf()->confGlobHashAlgo();
 
 	// sanity check for the selected algorithms
 	if (_cryptAlgo < PWM_CRYPT_BLOWFISH ||
 	    _cryptAlgo > PWM_CRYPT_TWOFISH128) {
 		printWarn("Invalid Crypto-Algorithm selected! "
 			  "Config-file seems to be corrupt. "
 			  "Falling back to Blowfish.");
 		_cryptAlgo = PWM_CRYPT_BLOWFISH;
 	}
 	if (_hashAlgo < PWM_HASH_SHA1 ||
 	    _hashAlgo > PWM_HASH_TIGER) {
 		printWarn("Invalid Hash-Algorithm selected! "
 			  "Config-file seems to be corrupt. "
 			  "Falling back to SHA1.");
 		_hashAlgo = PWM_HASH_SHA1;
 	}
 	char cryptAlgo = static_cast<char>(_cryptAlgo);
 	char hashAlgo = static_cast<char>(_hashAlgo);
 
 	if (conf()->confGlobMakeFileBackup()) {
 		if (!backupFile(filename))
 			return e_fileBackup;
 	}
     int mLastBackupDate = 0;
     KConfig configGlobal (locateLocal("config","pwmanagerbuprc"));
     QFileInfo fileInfo ( filename );
     mLastBackupDate = configGlobal.readNumEntry( "LastBackupDate-"+ fileInfo.fileName (), 0 );
       KConfig config (locateLocal("config","microkdeglobalrc"));
       config.setGroup( "BackupSettings" );
       bool b_enabled =   config.readBoolEntry( "BackupEnabled" );
-      if ( b_enabled ) {
+      if ( b_enabled && QFile::exists(filename)) {
           int num = config.readNumEntry( "BackupNumbers" );
           int d_count = config.readNumEntry( "BackupDayCount" );
           bool stdDir = config.readBoolEntry( "BackupUseDefaultDir" );
           QString bupDir = config.readEntry( "BackupDatadir" );
           QDate reference ( 2000,1,1 );
           int daysTo = reference.daysTo ( QDate::currentDate() ); 
           bool saveDate = false;
           if ( daysTo - d_count >= mLastBackupDate ) {
                 qDebug("KA: Last backup was %d days ago ", daysTo - mLastBackupDate );
                 if ( stdDir )
                     bupDir = KGlobalSettings::backupDataDir();
                 int retval =  KApplication::createBackup(  filename, bupDir, num );
                 if ( retval == 0 ) {
                     qDebug("KO: Backup cancelled. Will try again tomorrow ");
                     // retval == 0 : backup skipped for today, try again tomorrow
                     mLastBackupDate = daysTo - d_count+1;
                     saveDate = true;
                 } else if ( retval == 1 ){
                     qDebug("KO: Backup created.");
                     // backup ok
                     mLastBackupDate =  daysTo;
                     saveDate = true;
                 } else if ( retval == 2 ){
                     qDebug("KO: Backup globally cancelled.");
                     // backup globally cancelled
                     b_enabled = false;
                 }
                 if ( !b_enabled ) {
                     config.writeEntry( "mBackupEnabled", false );
                 }
                 if ( saveDate ) {
                     configGlobal.writeEntry( "LastBackupDate-"+ fileInfo.fileName (), mLastBackupDate );
                 }
           }
       }
 	if (QFile::exists(filename)) {
 		/* Move the existing file to some tmp file.
 		 * When saving file succeeds, delete tmp file. Otherwise
 		 * move tmp file back. See below.
 		 */
 		Randomizer *rnd = Randomizer::obj();
 		char rnd_buf[5];
 		sprintf(rnd_buf, "%X%X%X%X", rnd->genRndChar() & 0xFF, rnd->genRndChar() & 0xFF,
 			rnd->genRndChar() & 0xFF, rnd->genRndChar() & 0xFF);
 		tmpFileMoved = filename + "." + rnd_buf + ".mv";
 		if (!copyFile(filename, tmpFileMoved))
 			return e_openFile;
 		if (!QFile::remove(filename)) {
 			printWarn(string("removing orig file ")
 				  + filename.latin1()
 				  + " failed!");
 		}
 	}
 	f.setName(filename);
 	if (!f.open(IO_ReadWrite)) {
 		ret = e_openFile;
 		goto out_moveback;
 	}
 	e = writeFileHeader(hashAlgo, hashAlgo,
 			    cryptAlgo, compress,
 			    &currentPw, &f);
 	if (e == e_hashNotImpl) {
 		printDebug("PwMDoc::saveDoc(): writeFileHeader() failed: e_hashNotImpl");
 		f.close();
 		ret = e_hashNotImpl;
 		goto out_moveback;
 	} else if (e != e_success) {
 		printDebug("PwMDoc::saveDoc(): writeFileHeader() failed");
 		f.close();
 		ret = e_writeHeader;
 		goto out_moveback;
 	}
 	if (!serializeDta(&serialized)) {
 		printDebug("PwMDoc::saveDoc(): serializeDta() failed");
 		f.close();
 		ret = e_serializeDta;
 		goto out_moveback;
 	}
 	e = writeDataHash(hashAlgo, &serialized, &f);
 	if (e == e_hashNotImpl) {
 		printDebug("PwMDoc::saveDoc(): writeDataHash() failed: e_hashNotImpl");
 		f.close();
 		ret = e_hashNotImpl;
 		goto out_moveback;
 	} else if (e != e_success) {
 		printDebug("PwMDoc::saveDoc(): writeDataHash() failed");
 		f.close();
 		ret = e_writeHeader;
 		goto out_moveback;
 	}
 	if (!compressDta(&serialized, compress)) {
 		printDebug("PwMDoc::saveDoc(): compressDta() failed");
 		f.close();
 		ret = e_enc;
 		goto out_moveback;
 	}
 	e = encrypt(&serialized, &currentPw, &f, cryptAlgo, hashAlgo);
 	if (e == e_weakPw) {
 		printDebug("PwMDoc::saveDoc(): encrypt() failed: e_weakPw");
 		f.close();
 		ret = e_weakPw;
 		goto out_moveback;
 	} else if (e == e_cryptNotImpl) {
 		printDebug("PwMDoc::saveDoc(): encrypt() failed: e_cryptNotImpl");
 		f.close();
 		ret = e_cryptNotImpl;
 		goto out_moveback;
 	} else if (e != e_success) {
 		printDebug("PwMDoc::saveDoc(): encrypt() failed");
 		f.close();
 		ret = e_enc;
 		goto out_moveback;
 	}
 	unsetDocStatFlag(DOC_STAT_DISK_DIRTY);
 	f.close();
 #ifndef _WIN32_
 	if (chmod(filename.latin1(),
 		  conf()->confGlobFilePermissions())) {
 		printWarn(string("chmod failed: ") + strerror(errno));
 	}
 #endif
 	openDocList.edit(this, getTitle().latin1());
 	if (wasDeepLocked) {
 	  /* Do _not_ save the data with the deepLock()
 	   * call, because this will recurse
 	   * into saveDoc()
 	   */
 	  deepLock(true, false);
 	  /* We don't check return value here, because
 	   * it won't fail. See NOTE in deepLock()
 	   */
 	}	
 	if (tmpFileMoved != QString::null) {
 		// now remove the moved file.
 		if (!QFile::remove(tmpFileMoved)) {
 			printWarn(string("removing file ")
 				  + tmpFileMoved.latin1()
 				  + " failed!");
 		}
 	}
 	ret = e_success;
 	printDebug(string("writing file { name: ")
 		   + filename.latin1() + "   compress: "
 		   + tostr(static_cast<int>(compress)) + "   cryptAlgo: "
 		   + tostr(static_cast<int>(cryptAlgo)) + "   hashAlgo: "
 		   + tostr(static_cast<int>(hashAlgo))
 		   + " }");
 	goto out;
 out_moveback:
 	if (tmpFileMoved != QString::null) {
 		if (copyFile(tmpFileMoved, filename)) {
 			if (!QFile::remove(tmpFileMoved)) {
 				printWarn(string("removing tmp file ")
 					  + filename.latin1()
 					  + " failed!");
 			}
 		} else {
 			printWarn(string("couldn't copy file ")
 				  + tmpFileMoved.latin1()
 				  + " back to "
 				  + filename.latin1());
 		}
 	}
 out:
 	return ret;
 }
 
 PwMerror PwMDoc::openDoc(const QString *file, int openLocked)
 {
 	PWM_ASSERT(file);
 	PWM_ASSERT(openLocked == 0 || openLocked == 1 || openLocked == 2);
 	string decrypted, dataHash;
 	PwMerror ret;
 	char cryptAlgo, dataHashType, compress;
 	unsigned int headerLen;
 
 	if (*file == "")
 		return e_readFile;
 	filename = *file;
 	/* check if this file is already open.
 	 * This does not catch symlinks!
 	 */
 	if (!isDeepLocked()) {
 		if (getOpenDocList()->find(filename.latin1()))
 			return e_alreadyOpen;
 	}
 	QFile f(filename);
 
 	if (openLocked == 2) {
 		// open deep-locked
 		if (!QFile::exists(filename))
 			return e_openFile;
 		if (deepLock(true, false) != e_success)
 			return e_openFile;
 		goto out_success;
 	}
 
 	if (!f.open(IO_ReadOnly))
 		return e_openFile;
 
 	ret = checkHeader(&cryptAlgo, &currentPw, &compress, &headerLen,
 			  &dataHashType, &dataHash, &f);
 	if (ret != e_success) {
 		printDebug("PwMDoc::openDoc(): checkHeader() failed");
 		f.close();
 		if (ret == e_wrongPw) {
 			wrongMpwMsgBox(getDocStatFlag(DOC_STAT_USE_CHIPCARD));
 			return ret;
 		} else if (ret == e_noPw ||
 			   ret == e_fileVer ||
 			   ret == e_fileFormat ||
 			   ret == e_hashNotImpl) {
 			return ret;
 		} else
 			return e_readFile;
 	}
 	ret = decrypt(&decrypted, headerLen, &currentPw, cryptAlgo, dataHashType, &f);
 	if (ret == e_cryptNotImpl) {
 		printDebug("PwMDoc::openDoc(): decrypt() failed: e_cryptNotImpl");
 		f.close();
 		return e_cryptNotImpl;
 	} else if (ret != e_success) {
 		printDebug("PwMDoc::openDoc(): decrypt() failed");
 		f.close();
 		return e_readFile;
 	}
 	if (!decompressDta(&decrypted, compress)) {
 		printDebug("PwMDoc::openDoc(): decompressDta() failed");
 		f.close();
 		return e_fileCorrupt;
 	}
 	ret = checkDataHash(dataHashType, &dataHash, &decrypted);
 	if (ret == e_hashNotImpl) {
 		printDebug("PwMDoc::openDoc(): checkDataHash() failed: e_hashNotImpl");
 		f.close();
 		return e_hashNotImpl;
 	} else if (ret != e_success) {
 		printDebug("PwMDoc::openDoc(): checkDataHash() failed");
 		f.close();
 		return e_fileCorrupt;
 	}
 	if (!deSerializeDta(&decrypted, openLocked == 1)) {
 		printDebug("PwMDoc::openDoc(): deSerializeDta() failed");
 		f.close();
 		return e_readFile;
 	}
 	f.close();
 	timer()->start(DocTimer::id_mpwTimer);
 	timer()->start(DocTimer::id_autoLockTimer);
 out_success:
 	openDocList.edit(this, getTitle().latin1());
 	emit docOpened(this);
 	return e_success;
 }
 
 PwMerror PwMDoc::writeFileHeader(char keyHash, char dataHash, char crypt, char compress,
 				 QString *pw, QFile *f)
 {
 	PWM_ASSERT(pw);
 	PWM_ASSERT(f);
 	//US ENH: or maybe a bug: checking here for listView does not make sense because we do not check anywhere else
 	//Wenn I sync, I open a doc without a view => listView is 0 => Assertion 
 	//US	PWM_ASSERT(listView);
 	if (f->writeBlock(FILE_ID_HEADER, strlen(FILE_ID_HEADER)) !=
 	    static_cast<Q_LONG>(strlen(FILE_ID_HEADER))) {
 		return e_writeFile;
 	}
 	if (f->putch(PWM_FILE_VER) == -1 ||
 	    f->putch(keyHash) == -1 ||
 	    f->putch(dataHash) == -1 ||
 	    f->putch(crypt) == -1 ||
 	    f->putch(compress) == -1 ||
 	    f->putch((getDocStatFlag(DOC_STAT_USE_CHIPCARD)) ?
 		     (static_cast<char>(0x01)) : (static_cast<char>(0x00))) == -1) {
 		return e_writeFile;
 	}
 
 	// write bytes of NUL-data. These bytes are reserved for future-use.
 	const int bufSize = 64;
 	char tmp_buf[bufSize];
 	memset(tmp_buf, 0x00, bufSize);
 	if (f->writeBlock(tmp_buf, bufSize) != bufSize)
 		return e_writeFile;
 
 	switch (keyHash) {
 	case PWM_HASH_SHA1: {
 		const int hashlen = SHA1_HASH_LEN_BYTE;
 		Sha1 hash;
 		hash.sha1_write(reinterpret_cast<const byte *>(pw->latin1()), pw->length());
 		string ret = hash.sha1_read();
 		if (f->writeBlock(ret.c_str(), hashlen) != hashlen)
 			return e_writeFile;
 		break;
 	} 
 	case PWM_HASH_SHA256:
 		/*... fall through */
 	case PWM_HASH_SHA384:
 	case PWM_HASH_SHA512:
 	case PWM_HASH_MD5:
 	case PWM_HASH_RMD160:
 	case PWM_HASH_TIGER:
 	    {
 		if (!LibGCryptIf::available())
 			return e_hashNotImpl;
 		LibGCryptIf gc;
 		PwMerror err;
 		unsigned char *buf;
 		size_t hashLen;
 		err = gc.hash(&buf,
 			      &hashLen,
 			      reinterpret_cast<const unsigned char *>(pw->latin1()),
 			      pw->length(),
 			      keyHash);
 		if (err != e_success)
 			return e_hashNotImpl;
 		if (f->writeBlock(reinterpret_cast<const char *>(buf), hashLen)
 		    != static_cast<Q_LONG>(hashLen)) {
 			delete [] buf;
 			return e_hashNotImpl;
 		}
 		delete [] buf;
 		break;
 	} 
 	default: {
 		return e_hashNotImpl;
 	} }
 	return e_success;
 }
 
 PwMerror PwMDoc::checkHeader(char *cryptAlgo, QString *pw, char *compress,
 			     unsigned int *headerLength, char *dataHashType,
 			     string *dataHash, QFile *f)
 {
 	PWM_ASSERT(cryptAlgo);
 	PWM_ASSERT(pw);
 	PWM_ASSERT(headerLength);
 	PWM_ASSERT(dataHashType);
 	PWM_ASSERT(dataHash);
 	PWM_ASSERT(f);
 	int tmpRet;
 	// check "magic" header
 	const char magicHdr[] = FILE_ID_HEADER;
 	const int hdrLen = array_size(magicHdr) - 1;
 	char tmp[hdrLen];
 	if (f->readBlock(tmp, hdrLen) != hdrLen)
 		return e_readFile;
 	if (memcmp(tmp, magicHdr, hdrLen) != 0)
 		return e_fileFormat;
 	// read and check file ver
 	int fileV = f->getch();
 	if (fileV == -1)
 		return e_fileFormat;
 	if (fileV != PWM_FILE_VER)
 		return e_fileVer;
 	// read hash hash type
 	int keyHash = f->getch();
 	if (keyHash == -1)
 		return e_fileFormat;
 	// read data hash type
 	tmpRet = f->getch();
 	if (tmpRet == -1)
 		return e_fileFormat;
 	*dataHashType = tmpRet;
 	// read crypt algo
 	tmpRet = f->getch();
 	if (tmpRet == -1)
 		return e_fileFormat;
 	*cryptAlgo = tmpRet;
 	// get compression-algo
 	tmpRet = f->getch();
 	if (tmpRet == -1)
 		return e_fileFormat;
 	*compress = tmpRet;
 	// get the MPW-flag
 	int mpw_flag = f->getch();
 	if (mpw_flag == -1)
 		return e_fileFormat;
 	if (mpw_flag == 0x01)
 		setDocStatFlag(DOC_STAT_USE_CHIPCARD);
 	else
 		unsetDocStatFlag(DOC_STAT_USE_CHIPCARD);
 	// skip the "RESERVED"-bytes
 	if (!(f->at(f->at() + 64)))
 		return e_fileFormat;