public PortableExecutable(BinaryReader binaryReader)
{
br = binaryReader;
dosHeader = new DOSHeader(br);
br.BaseStream.Seek(dosHeader.GetPEHeaderOffset(), SeekOrigin.Begin); // e_lfanew offset
peHeader = new PEHeader(br);
// SECTIONS
var shList = new List<SectionHeader>();
for(int i = 0; i < peHeader.fileHeader.NumberOfSections; i++)
{
shList.Add(new SectionHeader(br));
}
sections = shList.ToArray();
long offset; // used for import and export
#region Import stuff
offset = Utils.RVAToFileOffset(this,peHeader.optionalHeader.ImportDirectory.VirtualAddress);
if (offset > 0)
{
br.BaseStream.Seek(offset, SeekOrigin.Begin);
ImportDescriptor id;
while ((id = new ImportDescriptor(br)).OriginalFirstThunk != 0)
{
br.BaseStream.Seek(Utils.RVAToFileOffset(this, id.Name), SeekOrigin.Begin);
string dllName = Encoding.ASCII.GetString(Utils.ReadString(br));
br.BaseStream.Seek(Utils.RVAToFileOffset(this, (id.OriginalFirstThunk != 0 ? id.OriginalFirstThunk : id.FirstThunk)), SeekOrigin.Begin);
var nameTable = new ImportNameTable(br);
var names = new List<ImportByName>();
for (int i = 0; i < nameTable.Names.Length; i++)
{
int ord;
const uint ordFlag = 0x80000000; // should've been used with a binary AND, but making a substraction does 2 things at once
if ((ord = (int)(nameTable.Names[i].AddressOfData - ordFlag)) > 0) // if import by ordinal
{
const string ordStr = "Import by Ordinal";
var ordImport = new ImportByName
{
Hint = (ushort)ord,
Name = Encoding.ASCII.GetBytes(ordStr),
};
names.Add(ordImport);
}
else
{
br.BaseStream.Seek(Utils.RVAToFileOffset(this, nameTable.Names[i].AddressOfData), SeekOrigin.Begin);
names.Add(new ImportByName(br));
}
}
imports.Add(dllName, names.ToArray());
offset += 20; // size of ImportDescriptor
br.BaseStream.Seek(offset, SeekOrigin.Begin);
}
}
#endregion
#region Export stuff
offset = Utils.RVAToFileOffset(this, peHeader.optionalHeader.ExportDirectory.VirtualAddress);
if(offset > 0)
{
br.BaseStream.Seek(offset, SeekOrigin.Begin);
var exportDir = new ExportDirectory(br);
uint nExports = exportDir.NumberOfFunctions;
uint namesOffset = Utils.RVAToFileOffset(this,exportDir.AddressOfNames);
uint functionsOffset = Utils.RVAToFileOffset(this,exportDir.AddressOfFunctions);
var lstExport = new List<Export>();
for (int i = 0; i < nExports; i++)
{
var e = new Export();
br.BaseStream.Seek(namesOffset, SeekOrigin.Begin);
br.BaseStream.Seek(Utils.RVAToFileOffset(this, br.ReadUInt32()), SeekOrigin.Begin);
e.Name = Utils.ReadString(br);
br.BaseStream.Seek(functionsOffset, SeekOrigin.Begin);
e.Address = br.ReadUInt32();
e.Ordinal = (ushort)(i + exportDir.Base);
namesOffset += sizeof(uint);
functionsOffset += sizeof(uint);
lstExport.Add(e);
}
exports = lstExport.ToArray();
}
#endregion
}
public ImportByNameParser(ref ImportByName importByName)
{
name = importByName;
}