SaveToStream writes a relative security descriptor into a stream. The method uses a magic header to check for position errors in a stream. 

• Bytes | Value
• 1..5 (5) | SD_MAGIC_HEADER (byte array)
• 6..9 (4) | SD size (Cardinal)
• 10..17 (8) | hash value (Int64)
• 18..18 (1) | hash value in use (byte) true if 255 otherwise false. == SD_HEADER_SIZE
• 19..sd (size) | security descriptor data

Do not depend on this layout since it can be changed depending on the magic header.

TJwSecurityDescriptor Methods