/// <summary>
/// Process a TNEF-encoded message and return an object with the message's body, content type, and attachments.
/// </summary>
public TnefEncoding(byte[] TnefEncodedBytes)
{
MimeAttachments = new List<MimePart>();
// Confirm the TNEF signature.
uint signature = ReadUint32(TnefEncodedBytes);
if (signature == 0x223E9F78)
{
uint referenceKey = ReadUint16(TnefEncodedBytes);
// Variables to track the last attachment properties discovered.
string currentAttachmentFileName = "";
byte[] currentAttachmentBody = null;
// Loop through each TNEF-encoded component.
while (Cursor < TnefEncodedBytes.Length)
{
byte headerComponent = TnefEncodedBytes[Cursor++];
uint headerType = ReadUint16(TnefEncodedBytes) & 0x0000FFFF;
uint headerId = ReadUint16(TnefEncodedBytes);
uint headerSize = ReadUint32(TnefEncodedBytes);
if (headerSize > 0)
{
// Load the data of this TNEF component into its own array.
byte[] data = new byte[headerSize];
Buffer.BlockCopy(TnefEncodedBytes, Cursor, data, 0, (int)headerSize);
Cursor += (int)headerSize;
// Require valid checksums.
uint readChecksum = ReadUint16(TnefEncodedBytes);
uint calculatedChecksum = CalculateChecksum(data);
if (readChecksum == calculatedChecksum)
{
// Process only the TNEF components related to the body and attachments.
switch (headerType)
{
case 0x0000: // Owner
case 0x0001: // Sent For
case 0x0002: // Delegate
case 0x0006: // Date Start
case 0x0007: // Date End
case 0x0008: // Owner Appt ID
case 0x0009: // Response Requested
case 0x8000: // From
case 0x8004: // Subject
case 0x8005: // Date Sent
case 0x8006: // Date Received
case 0x8007: // Flags
case 0x8008: // Message Class
case 0x8009: // Message ID
case 0x800A: // Parent ID
case 0x800B: // Conversation ID
case 0x800C: // Body
case 0x800D: // Priority
break;
case 0x800F: // Attachment Data
// Check if we've already found this attachment's filename, and if so, record it.
if (!string.IsNullOrEmpty(currentAttachmentFileName))
{
MimeAttachments.Add(new MimePart(currentAttachmentFileName, Functions.GetDefaultContentTypeForExtension(currentAttachmentFileName), "", "", "", data));
currentAttachmentFileName = "";
}
else
currentAttachmentBody = data;
break;
case 0x8010: // Attachment Title
// Check if we've already found this attachment's contents, and if so, record it.
if (currentAttachmentBody != null)
{
MimeAttachments.Add(new MimePart(ParseNullTerminatedString(Encoding.UTF8.GetString(data)), Functions.GetDefaultContentTypeForExtension(ParseNullTerminatedString(Encoding.UTF8.GetString(data))), "", "", "", currentAttachmentBody));
currentAttachmentBody = null;
}
else
currentAttachmentFileName = ParseNullTerminatedString(Encoding.UTF8.GetString(data));
break;
case 0x8011: // Attachment Rendering
case 0x8012: // Attachment Creation Date
case 0x8013: // Attachment Modified Date
case 0x8020: // Modified Date
case 0x9001: // Attachment Transport Name
case 0x9002: // Attachment Rendering Data
case 0x9003: // MAPI Properties
if (data.Length > 16)
{
// Attempt to unpack the MAPI properties.
MapiProperties props = new MapiProperties(data);
if (!string.IsNullOrEmpty(props.Body))
{
Body = props.Body;
ContentType = props.ContentType;
}
}
break;
case 0x9004: // Recipients Table
case 0x9005: // Attachment
case 0x9006: // TNEF Version
case 0x9007: // OEM Code Page
case 0x9008: // Original Message Class
break;
}
}
}
}
}
}
/// <summary>
/// Process a TNEF-encoded message and return an object with the message's body, content type, and attachments.
/// </summary>
public TnefEncoding(byte[] TnefEncodedBytes)
{
MimeAttachments = new List <MimePart>();
// Confirm the TNEF signature.
uint signature = ReadUint32(TnefEncodedBytes);
if (signature == 0x223E9F78)
{
uint referenceKey = ReadUint16(TnefEncodedBytes);
// Variables to track the last attachment properties discovered.
string currentAttachmentFileName = "";
byte[] currentAttachmentBody = null;
// Loop through each TNEF-encoded component.
while (Cursor < TnefEncodedBytes.Length)
{
byte headerComponent = TnefEncodedBytes[Cursor++];
uint headerType = ReadUint16(TnefEncodedBytes) & 0x0000FFFF;
uint headerId = ReadUint16(TnefEncodedBytes);
uint headerSize = ReadUint32(TnefEncodedBytes);
if (headerSize > 0)
{
// Load the data of this TNEF component into its own array.
byte[] data = new byte[headerSize];
Buffer.BlockCopy(TnefEncodedBytes, Cursor, data, 0, (int)headerSize);
Cursor += (int)headerSize;
// Require valid checksums.
uint readChecksum = ReadUint16(TnefEncodedBytes);
uint calculatedChecksum = CalculateChecksum(data);
if (readChecksum == calculatedChecksum)
{
// Process only the TNEF components related to the body and attachments.
switch (headerType)
{
case 0x0000: // Owner
case 0x0001: // Sent For
case 0x0002: // Delegate
case 0x0006: // Date Start
case 0x0007: // Date End
case 0x0008: // Owner Appt ID
case 0x0009: // Response Requested
case 0x8000: // From
case 0x8004: // Subject
case 0x8005: // Date Sent
case 0x8006: // Date Received
case 0x8007: // Flags
case 0x8008: // Message Class
case 0x8009: // Message ID
case 0x800A: // Parent ID
case 0x800B: // Conversation ID
case 0x800C: // Body
case 0x800D: // Priority
break;
case 0x800F: // Attachment Data
// Check if we've already found this attachment's filename, and if so, record it.
if (!string.IsNullOrEmpty(currentAttachmentFileName))
{
MimeAttachments.Add(new MimePart(currentAttachmentFileName, Functions.GetDefaultContentTypeForExtension(currentAttachmentFileName), "", "", "", data));
currentAttachmentFileName = "";
}
else
{
currentAttachmentBody = data;
}
break;
case 0x8010: // Attachment Title
// Check if we've already found this attachment's contents, and if so, record it.
if (currentAttachmentBody != null)
{
MimeAttachments.Add(new MimePart(ParseNullTerminatedString(Encoding.UTF8.GetString(data)), Functions.GetDefaultContentTypeForExtension(ParseNullTerminatedString(Encoding.UTF8.GetString(data))), "", "", "", currentAttachmentBody));
currentAttachmentBody = null;
}
else
{
currentAttachmentFileName = ParseNullTerminatedString(Encoding.UTF8.GetString(data));
}
break;
case 0x8011: // Attachment Rendering
case 0x8012: // Attachment Creation Date
case 0x8013: // Attachment Modified Date
case 0x8020: // Modified Date
case 0x9001: // Attachment Transport Name
case 0x9002: // Attachment Rendering Data
case 0x9003: // MAPI Properties
if (data.Length > 16)
{
// Attempt to unpack the MAPI properties.
MapiProperties props = new MapiProperties(data);
if (!string.IsNullOrEmpty(props.Body))
{
Body = props.Body;
ContentType = props.ContentType;
}
}
break;
case 0x9004: // Recipients Table
case 0x9005: // Attachment
case 0x9006: // TNEF Version
case 0x9007: // OEM Code Page
case 0x9008: // Original Message Class
break;
}
}
}
}
}
}
