private void ReadImageNTHeaders()
{
// Calculate the offset where the IMAGE_OPTIONAL_HEADER starts
UInt32 imageOptionalHeaderOffset = ImageNTHeadersOffset + 4 + (UInt32)Marshal.SizeOf <IMAGE_FILE_HEADER>();
using (FileStream stream = new FileStream(Path, FileMode.Open, FileAccess.Read, FileShare.Read))
using (BinaryReader reader = new BinaryReader(stream))
{
reader.BaseStream.Seek(imageOptionalHeaderOffset, SeekOrigin.Begin);
// Retrieve the Magic field and then read the appropriate (32-bit or 64-bit) IMAGE_NT_OPTIONAL_HEADER
OptionalHeaderMagic = (ImageOptionalHeaderMagic)reader.ReadUInt16();
if (OptionalHeaderMagic == ImageOptionalHeaderMagic.IMAGE_NT_OPTIONAL_HDR32_MAGIC)
{
ImageNTHeaders32 = IMAGE_NT_HEADERS32.Read(Path, ImageDosHeader.e_lfanew);
FirstImageSectionHeaderOffset = ImageNTHeadersOffset + (UInt32)Marshal.SizeOf <IMAGE_NT_HEADERS32>();
NumberOfImageSectionHeaders = ImageNTHeaders32.FileHeader.NumberOfSections;
}
else if (OptionalHeaderMagic == ImageOptionalHeaderMagic.IMAGE_NT_OPTIONAL_HDR64_MAGIC)
{
ImageNTHeaders64 = IMAGE_NT_HEADERS64.Read(Path, ImageDosHeader.e_lfanew);
FirstImageSectionHeaderOffset = ImageNTHeadersOffset + (UInt32)Marshal.SizeOf <IMAGE_NT_HEADERS64>();
NumberOfImageSectionHeaders = ImageNTHeaders64.FileHeader.NumberOfSections;
}
}
}
/// <summary>
/// Reads the <see cref="IMAGE_NT_HEADERS32"/> structure from a file, starting at a specific offset
/// </summary>
/// <param name="path">The file to read</param>
/// <param name="headerOffset">The offset in the file from where the structure will be read.</param>
/// <returns></returns>
public static IMAGE_NT_HEADERS32 Read(string path, UInt32 headerOffset)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
using (FileStream stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read))
using (BinaryReader reader = new BinaryReader(stream))
{
reader.BaseStream.Seek(headerOffset, SeekOrigin.Begin);
IMAGE_NT_HEADERS32 imageNTHeaders32 = new IMAGE_NT_HEADERS32();
imageNTHeaders32.Signature = reader.ReadUInt32();
imageNTHeaders32.FileHeader = ImageFileHeader.Read(reader);
imageNTHeaders32.OptionalHeader32 = ImageOptionalHeader32.Read(reader);
return(imageNTHeaders32);
}
}
