/// <summary>
/// Creates this object and sets all its properties
/// </summary>
/// <param name="stream">The Compound File Storage Ole <see cref="CFStream" /></param>
internal OleStream(CFStream stream)
{
using (var memoryStream = new MemoryStream(stream.GetData()))
using (var binaryReader = new BinaryReader(memoryStream))
{
Version = binaryReader.ReadUInt16();
// Flags (4 bytes): If this field is set to 0x00000001, the OLEStream structure MUST be for a linked object and
// the CLSID field of the Compound File Directory Entry of the OLE Compound File Storage object MUST be set to
// CLSID_StdOleLink ({00000300-0000-0000-C000-000000000046}). If this field is set to 0x00000000, then the OLEStream
// structure MUST be for an embedded object and the CLSID field of the Compound File Directory Entry
// of the OLE Compound File Storage object MUST be set to the object class GUID of the creating application.
var flags = binaryReader.ReadUInt32();
switch (flags)
{
case 0x00000000:
case 0x00001000:
Format = OleFormat.File;
break;
case 0x00000001:
case 0x00001001:
Format = OleFormat.Link;
break;
}
// LinkUpdateOption (4 bytes): This field contains an implementation-specific hint supplied by the application or by
// a higher-level protocol that creates the data structure. The hint MAY be ignored on processing of this data structure
LinkUpdateOptions = binaryReader.ReadUInt32();
//Reserved1 (4 bytes): This MUST be set to 0x00000000. Otherwise, the OLEStream structure is invalid
binaryReader.ReadUInt32();
// ReservedMonikerStreamSize (4 bytes): This MUST be set to the size, in bytes, of the ReservedMonikerStream field. If this
// field has a value 0x00000000, the ReservedMonikerStream field MUST NOT be present.
var reservedMonikerStreamSize = (int)binaryReader.ReadUInt32();
// ReservedMonikerStream (variable): This MUST be a MONIKERSTREAM structure that can contain any arbitrary
// value and MUST be ignored on processing.
binaryReader.ReadBytes(reservedMonikerStreamSize);
// Note The fields that follow MUST NOT be present if the OLEStream structure is for an embedded object.
if (Format == OleFormat.Link)
{
// RelativeSourceMonikerStreamSize (4 bytes): This MUST be set to the size, in bytes, of the RelativeSourceMonikerStream field.
// If this field has a value 0x00000000, the RelativeSourceMonikerStream field MUST NOT be present.
var relativeSourceMonikerStreamSize = (int)binaryReader.ReadUInt32();
// RelativeSourceMonikerStream (variable): This MUST be a MONIKERSTREAM structure that specifies the relative
// path to the linked object.
if (relativeSourceMonikerStreamSize > 0)
{
RelativeSource = new MonikerStream(binaryReader, relativeSourceMonikerStreamSize);
}
// AbsoluteSourceMonikerStreamSize (4 bytes): This MUST be set to the size, in bytes, of the AbsoluteSourceMonikerStream field.
// This field MUST NOT contain the value 0x00000000.
var absoluteSourceMonikerStreamSize = (int)binaryReader.ReadUInt32();
// AbsoluteSourceMonikerStream (variable): This MUST be a MONIKERSTREAM structure that specifies the full path
// to the linked object.
if (absoluteSourceMonikerStreamSize > 0)
{
AbsoluteSource = new MonikerStream(binaryReader, absoluteSourceMonikerStreamSize);
}
// If the RelativeSourceMonikerStream field is present, it MUST be used by the container application instead of the
// AbsoluteSourceMonikerStream. If the RelativeSourceMonikerStream field is not present, the AbsoluteSourceMonikerStream MUST be used
// by the container application.
// ClsidIndicator (4 bytes): This MUST be the LONG as specified in section value -1. Otherwise the OLEStream
// structure is invalid.
binaryReader.ReadUInt32();
// Clsid (16 bytes): This MUST be the CLSID (Packet) containing the object class GUID of the creating application.
Clsid = new CLSID(binaryReader);
// ReservedDisplayName (4 bytes): This MUST be a LengthPrefixedUnicodeString that can contain any arbitrary value
// and MUST be ignored on processing.
binaryReader.ReadUInt32();
// Reserved2 (4 bytes): This can contain any arbitrary value and MUST be ignored on processing.
binaryReader.ReadUInt32();
// LocalUpdateTime (4 bytes): This MUST be a FILETIME (Packet) that contains the time when the container application
// last updated the RemoteUpdateTime field.
var localUpdateTime = binaryReader.ReadBytes(4).Reverse().ToArray();
LocalUpdateTime = DateTime.FromFileTime(BitConverter.ToInt32(localUpdateTime, 0));
// LocalCheckUpdateTime (4 bytes): This MUST be a FILETIME (Packet) that contains the time when the container application last
// checked the update time of the linked object.
var localCheckUpdateTime = binaryReader.ReadBytes(4).Reverse().ToArray();
LocalCheckUpdateTime = DateTime.FromFileTime(BitConverter.ToInt32(localCheckUpdateTime, 0));
// RemoteUpdateTime (4 bytes): This MUST be a FILETIME (Packet) that contains the time when the linked object was last updated.
var remoteUpdateTime = binaryReader.ReadBytes(4).Reverse().ToArray();
RemoteUpdateTime = DateTime.FromFileTime(BitConverter.ToInt32(remoteUpdateTime, 0));
}
}
}
/// <summary>
/// Creates this object and sets all its properties
/// </summary>
/// <param name="stream">The Compound File Storage Ole <see cref="CFStream" /></param>
internal OleStream(ICFStream stream)
{
using (var memoryStream = new MemoryStream(stream.GetData()))
using (var binaryReader = new BinaryReader(memoryStream))
{
Version = binaryReader.ReadUInt16();
// Flags (4 bytes): If this field is set to 0x00000001, the OLEStream structure MUST be for a linked object and
// the CLSID field of the Compound File Directory Entry of the OLE Compound File Storage object MUST be set to
// CLSID_StdOleLink ({00000300-0000-0000-C000-000000000046}). If this field is set to 0x00000000, then the OLEStream
// structure MUST be for an embedded object and the CLSID field of the Compound File Directory Entry
// of the OLE Compound File Storage object MUST be set to the object class GUID of the creating application.
var flags = binaryReader.ReadUInt32();
switch (flags)
{
case 0x00000000:
case 0x00001000:
Format = OleFormat.File;
break;
case 0x00000001:
case 0x00001001:
Format = OleFormat.Link;
break;
}
// LinkUpdateOption (4 bytes): This field contains an implementation-specific hint supplied by the application or by
// a higher-level protocol that creates the data structure. The hint MAY be ignored on processing of this data structure
LinkUpdateOptions = binaryReader.ReadUInt32();
//Reserved1 (4 bytes): This MUST be set to 0x00000000. Otherwise, the OLEStream structure is invalid
binaryReader.ReadUInt32();
// ReservedMonikerStreamSize (4 bytes): This MUST be set to the size, in bytes, of the ReservedMonikerStream field. If this
// field has a value 0x00000000, the ReservedMonikerStream field MUST NOT be present.
var reservedMonikerStreamSize = (int) binaryReader.ReadUInt32();
// ReservedMonikerStream (variable): This MUST be a MONIKERSTREAM structure that can contain any arbitrary
// value and MUST be ignored on processing.
binaryReader.ReadBytes(reservedMonikerStreamSize);
// Note The fields that follow MUST NOT be present if the OLEStream structure is for an embedded object.
if (Format == OleFormat.Link)
{
// RelativeSourceMonikerStreamSize (4 bytes): This MUST be set to the size, in bytes, of the RelativeSourceMonikerStream field.
// If this field has a value 0x00000000, the RelativeSourceMonikerStream field MUST NOT be present.
var relativeSourceMonikerStreamSize = (int) binaryReader.ReadUInt32();
// RelativeSourceMonikerStream (variable): This MUST be a MONIKERSTREAM structure that specifies the relative
// path to the linked object.
if (relativeSourceMonikerStreamSize > 0)
RelativeSource = new MonikerStream(binaryReader, relativeSourceMonikerStreamSize);
// AbsoluteSourceMonikerStreamSize (4 bytes): This MUST be set to the size, in bytes, of the AbsoluteSourceMonikerStream field.
// This field MUST NOT contain the value 0x00000000.
var absoluteSourceMonikerStreamSize = (int) binaryReader.ReadUInt32();
// AbsoluteSourceMonikerStream (variable): This MUST be a MONIKERSTREAM structure that specifies the full path
// to the linked object.
if (absoluteSourceMonikerStreamSize > 0)
AbsoluteSource = new MonikerStream(binaryReader, absoluteSourceMonikerStreamSize);
// If the RelativeSourceMonikerStream field is present, it MUST be used by the container application instead of the
// AbsoluteSourceMonikerStream. If the RelativeSourceMonikerStream field is not present, the AbsoluteSourceMonikerStream MUST be used
// by the container application.
// ClsidIndicator (4 bytes): This MUST be the LONG as specified in section value -1. Otherwise the OLEStream
// structure is invalid.
binaryReader.ReadUInt32();
// Clsid (16 bytes): This MUST be the CLSID (Packet) containing the object class GUID of the creating application.
Clsid = new CLSID(binaryReader);
// ReservedDisplayName (4 bytes): This MUST be a LengthPrefixedUnicodeString that can contain any arbitrary value
// and MUST be ignored on processing.
binaryReader.ReadUInt32();
// Reserved2 (4 bytes): This can contain any arbitrary value and MUST be ignored on processing.
binaryReader.ReadUInt32();
// LocalUpdateTime (4 bytes): This MUST be a FILETIME (Packet) that contains the time when the container application
// last updated the RemoteUpdateTime field.
var localUpdateTime = binaryReader.ReadBytes(4).Reverse().ToArray();
LocalUpdateTime = DateTime.FromFileTime(BitConverter.ToInt32(localUpdateTime, 0));
// LocalCheckUpdateTime (4 bytes): This MUST be a FILETIME (Packet) that contains the time when the container application last
// checked the update time of the linked object.
var localCheckUpdateTime = binaryReader.ReadBytes(4).Reverse().ToArray();
LocalCheckUpdateTime = DateTime.FromFileTime(BitConverter.ToInt32(localCheckUpdateTime, 0));
// RemoteUpdateTime (4 bytes): This MUST be a FILETIME (Packet) that contains the time when the linked object was last updated.
var remoteUpdateTime = binaryReader.ReadBytes(4).Reverse().ToArray();
RemoteUpdateTime = DateTime.FromFileTime(BitConverter.ToInt32(remoteUpdateTime, 0));
}
}
}