private bool InitialiserMethodForExcelFile()
{
StructuredStorageInterface.IStorage iStorage;
IStream iStream = GetStream(out iStorage, "Workbook");
if (null == iStream)
{
iStream = GetStream(out iStorage, "Book");
if (null == iStream)
return false;
}
m_fileData.FileType = FileType.ExcelSheet;
using (new ComObjectGovernor(iStream))
using (new ComObjectGovernor(iStorage))
{
StreamWrapper stream = new StreamWrapper(iStream);
XLBOF xlbof = new XLBOF();
object bofObject = xlbof;
stream.GetHeaderStructure(ref bofObject);
xlbof = (XLBOF) bofObject;
if (xlbof.vers == 0x08)
{
switch (xlbof.vers2)
{
case 0x0500:
break;
case 0x0600:
break;
case 0x1333:
break;
default:
return false;
}
}
StructuredStorageInterface.IPropertyStorage ipropertyStorage = GetPropertyStorage(iStorage, StructuredStorageInterface.FMTID_SummaryInformation);
if (ipropertyStorage != null)
// Not all excel documents have summary information
// Content detail reports only have a Workbook section.
{
using (new ComObjectGovernor(ipropertyStorage))
using (new ComObjectGovernor(iStorage))
{
StructuredStorageInterface.IEnumSTATPROPSTG iEnumSTATPROPSTG;
ipropertyStorage.Enum(out iEnumSTATPROPSTG);
if (null != iEnumSTATPROPSTG)
{
StructuredStorageInterface.STATPROPSTG statprop;
while (1 == iEnumSTATPROPSTG.Next(1, out statprop))
{
if (statprop.PROPID == StructuredStorageInterface.PIDSI_DOC_SECURITY)
{
StructuredStorageInterface.PROPSPEC propspec = new StructuredStorageInterface.PROPSPEC
{
PROPID = StructuredStorageInterface.PIDSI_DOC_SECURITY,
ulKind = 1
};
try
{
StructuredStorageInterface.PROPVARIANT propval;
ipropertyStorage.ReadMultiple(1, ref propspec, out propval);
if (1 == propval.value)
{
m_fileData.ReadPasswordProtected = true;
}
}
catch (COMException)
{
// above check can throw in 64 bit, not sure what to do about it
}
}
}
}
}
}
// Check if file is also write protected...
// (A write protected workbook that is not read protected, will not have the PIDSI_DOC_SECURITY flag)
m_fileData.WritePasswordProtected = ExcelDocumentReader.IsWriteProtected(m_fileData.BinaryFileData);
m_impl = new FileImpl(m_fileData);
return true;
}
}
private bool HasDocumentProtection(FIB fib, DOPHeader dopHeader)
{
StructuredStorageInterface.IStorage iStorageDOP;
IStream iStreamDOP;
// read the fWhichTblStm bit
if ((fib.bitData & 0x0200) == 0x0200)
{
iStreamDOP = GetStream(out iStorageDOP, "1Table");
}
else
{
iStreamDOP = GetStream(out iStorageDOP, "0Table");
}
if (iStreamDOP != null)
{
using (new ComObjectGovernor(iStreamDOP))
using (new ComObjectGovernor(iStorageDOP))
{
StreamWrapper streamDOP = new StreamWrapper(iStreamDOP);
short bFlags = streamDOP.GetDOPFlag(dopHeader, 0x0006);
bool bLockAtn = (bFlags & 0x0010) == 0x0010; // annotations locked for editing
bool bProtEnabled = (bFlags & 0x0200) == 0x0200; // document protected for edit operations
bool bLockRev = (bFlags & 0x4000) == 0x4000; // revision marking state locked
if (bLockAtn || bLockRev || bProtEnabled)
{
return true;
}
if (fib.version >= 217) // Word 2000 or later
{
short bDocumentProtection = streamDOP.GetDOPFlag(dopHeader, 0x0254);
bool bEnforceProtection = (bDocumentProtection & 0x0008) == 0x0008;
return bEnforceProtection;
}
}
}
return false;
}
private bool InitialiserMethodForWordFileOnDisk()
{
StructuredStorageInterface.IStorage iStorage;
IStream iStream = GetStream(out iStorage, "WordDocument");
if (null == iStream)
return false;
StreamWrapper stream;
FIB fib;
DOPHeader dopHeader;
using (new ComObjectGovernor(iStream))
using (new ComObjectGovernor(iStorage))
{
stream = new StreamWrapper(iStream);
fib = new FIB();
dopHeader = new DOPHeader();
stream.GetDOP(ref dopHeader);
object fibObject = fib as object;
stream.GetHeaderStructure(ref fibObject);
fib = (FIB)fibObject;
}
// \ /
// .\-/.
// /\ () () /\
// / \ /~-~\ / \
// y Y V
// ,-^-./ | \,-^-.
/// { | } \
// \ | /
// /\ A /\
// / \/ \/ \
// / \
//
// int numLols = 1 // increment every time you see this for the first time
if (fib.magicNumber != 0) //THIS ZERO-CHECK IS A HACK FOR PROTECT MOBILE - IT SHOULD BE REMOVED ASAP
{
//THIS is the proper code to check for Word file versioning. This should stay.
if (fib.magicNumber != 0xA5DC && fib.magicNumber != 0xA5EC)
return false;
}
//we will get this far with a docx/docm if it is encrypted but the FIB is empty then so we can drop out now
if (fib.bitData == 0 && fib.lid == 0 && fib.magicNumber == 0 && fib.version == 0 && fib.nProduct == 0)
{
return false;
}
m_fileData.FileType = FileType.WordDocument;
if ((fib.bitData & StreamWrapper.fEncrypted) == StreamWrapper.fEncrypted)
m_fileData.ReadPasswordProtected = true;
if ((fib.bitData & StreamWrapper.fWriteReservation) == StreamWrapper.fWriteReservation)
m_fileData.WritePasswordProtected = true;
// only try to find the document protection flags within the DOP if we know that the
// file is not encrypted. Otherwise the offsets are not valid.
if (!m_fileData.ReadPasswordProtected && !m_fileData.WritePasswordProtected)
{
//DOPHeader dopHeader = new DOPHeader();
//stream.GetDOP(ref dopHeader);
m_fileData.DocumentProtected = HasDocumentProtection(fib, dopHeader);
}
m_impl = new FileImpl(m_fileData);
return true;
//}
}
private bool InitialiseMethodForEncryptedDocXFileOnDisk()
{
StructuredStorageInterface.IStorage iStorage;
IStream iStream = GetStream(out iStorage, "WordDocument");
bool bIstream = false;
using (new ComObjectGovernor(iStream))
using (new ComObjectGovernor(iStorage))
{
bIstream = iStream == null ? false : true;
}
if (!bIstream && (iStorage == null))
return false;
// Office2007 SP2 does not have "WordDocument" stream
if (!bIstream && (iStorage != null))
{
bool bIstream1 = false;
IStream iStream1 = GetStream(out iStorage, "EncryptionInfo");
using (new ComObjectGovernor(iStream1))
using (new ComObjectGovernor(iStorage))
{
bIstream1 = iStream1 == null ? false : true;
}
bool bIstream2 = false;
IStream iStream2 = GetStream(out iStorage, "EncryptedPackage");
using (new ComObjectGovernor(iStream2))
using (new ComObjectGovernor(iStorage))
{
bIstream2 = iStream2 == null ? false : true;
}
string filename = m_fileData.Filename.ToLower();
if ((bIstream1 && bIstream2) &&
(filename.EndsWith("docx", StringComparison.InvariantCultureIgnoreCase)
|| filename.EndsWith("docm", StringComparison.InvariantCultureIgnoreCase)
|| filename.EndsWith("doc", StringComparison.InvariantCultureIgnoreCase)))
{
m_fileData.FileType = FileType.WordDocumentX;
m_fileData.ReadPasswordProtected = true;
m_fileData.WritePasswordProtected = true;
m_impl = new FileImpl(m_fileData);
return true;
}
else
return false;
}
iStream = GetStream(out iStorage, "WordDocument");
FIB fib = new FIB();
using (new ComObjectGovernor(iStream))
using (new ComObjectGovernor(iStorage))
{
StreamWrapper stream = new StreamWrapper(iStream);
object fibObject = fib as object;
stream.GetHeaderStructure(ref fibObject);
fib = (FIB) fibObject;
}
if (fib.bitData == 0 && fib.lid == 0 && fib.magicNumber == 0 && fib.version == 0 && fib.nProduct == 0)
{
bool bIstream1 = false;
IStream iStream1 = GetStream(out iStorage, "EncryptionInfo");
using (new ComObjectGovernor(iStream1))
using (new ComObjectGovernor(iStorage))
{
bIstream1 = iStream1 == null ? false : true;
}
bool bIstream2 = false;
IStream iStream2 = GetStream(out iStorage, "EncryptedPackage");
using (new ComObjectGovernor(iStream2))
using (new ComObjectGovernor(iStorage))
{
bIstream2 = iStream2 == null ? false : true;
}
if (bIstream1 && bIstream2)
{
m_fileData.FileType = FileType.WordDocumentX;
m_fileData.ReadPasswordProtected = true;
m_fileData.WritePasswordProtected = true;
m_impl = new FileImpl(m_fileData);
return true;
}
}
return false;
}
