public static PortableExecutableFileHeader Read(string peFilePath)
{
var peFileHeader = new PortableExecutableFileHeader()
{
IsValid = false,
DosHeader = null,
NtHeader = null,
};
// Read DOS header.
var dosHeader = ImageDosHeader.Read(peFilePath);
if (!dosHeader.IsValid)
{
return(peFileHeader);
}
// Read NT header.
var ntHeader = ImageNtHeaders.Read(peFilePath, dosHeader.e_lfanew);
if (!ntHeader.IsValid)
{
return(peFileHeader);
}
peFileHeader.IsValid = true;
peFileHeader.DosHeader = dosHeader;
peFileHeader.NtHeader = ntHeader;
return(peFileHeader);
}
internal static ImageNtHeaders Read(string filePath, int ntHeaderOffset)
{
var ntHeader = new ImageNtHeaders()
{
IsValid = false,
Signature = 0,
FileHeader = null,
OptionalHeader = null,
};
using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
using (var reader = new BinaryReader(stream))
{
// Read sigunature of NT header.
reader.BaseStream.Seek(ntHeaderOffset, SeekOrigin.Begin); // Set position to the NT header.
var signature = reader.ReadUInt32();
if (signature != ImageNtSignature)
{
return(ntHeader);
}
// Read file header.
var fileHeader = ImageFileHeader.Read(reader);
// Read optional header magic.
var currentPosition = reader.BaseStream.Position; // Save current position.
var optionalHeaderMagic = reader.ReadUInt16();
reader.BaseStream.Seek(currentPosition, SeekOrigin.Begin); // Restore position.
ImageOptionalHeader optionalHeader;
if (optionalHeaderMagic == NativeImageOptionalHeader.ImageNtOptionalHeader32Magic)
{
// Read optinal header as 32-bit.
optionalHeader = ImageOptionalHeader32.Read(reader);
}
else if (optionalHeaderMagic == NativeImageOptionalHeader.ImageNtOptionalHeader64Magic)
{
// Read optinal header as 64-bit.
optionalHeader = ImageOptionalHeader64.Read(reader);
}
else
{
return(ntHeader);
}
ntHeader.IsValid = true;
ntHeader.Signature = signature;
ntHeader.FileHeader = fileHeader;
ntHeader.OptionalHeader = optionalHeader;
return(ntHeader);
}
}