internal static Win32ExeHeader FromBinaryReader(BinaryReader reader)
{
try
{
long startPosition = reader.BaseStream.Position;
long length = reader.BaseStream.Length - startPosition;
if (length < 0x1000)
{
return(null);
}
Win32ExeHeader ret = new Win32ExeHeader();
ret.DosHeader = IMAGE_DOS_HEADER.FromBinaryReader(reader);
if (ret.DosHeader == null)
{
return(null);
}
if (ret.DosHeader.e_lfanew <= 0)
{
return(ret);
}
reader.BaseStream.Seek(startPosition + ret.DosHeader.e_lfanew, SeekOrigin.Begin);
ret.NtHeader = IMAGE_NT_HEADERS.FromBinaryReader(reader);
if (ret.NtHeader == null)
{
return(null);
}
IMAGE_SECTION_HEADER section = IMAGE_SECTION_HEADER.FromBinaryReader(reader);
while (section != null)
{
ret.SectionHeaders.Add(section);
section = IMAGE_SECTION_HEADER.FromBinaryReader(reader);
}
return(ret);
}
catch
{
return(null);
}
}
private bool readHeader()
{
startPosition = reader.BaseStream.Position;
streamLength = reader.BaseStream.Length - startPosition;
char[] identifier = reader.ReadChars(4);
if (identifier.Length < 4)
{
return(false);
}
reader.BaseStream.Seek(startPosition, SeekOrigin.Begin);
if ((identifier[0] == 'M') && (identifier[1] == 'Z'))
{
Win32ExeHeader winHeader = Win32ExeHeader.FromBinaryReader(reader);
if (winHeader == null)
{
return(false);
}
startPosition += winHeader.EndOfExecutableRegion;
streamLength = reader.BaseStream.Length - startPosition;
reader.BaseStream.Seek(startPosition, SeekOrigin.Begin);
identifier = reader.ReadChars(4);
if (identifier.Length < 4)
{
return(false);
}
}
if (!((identifier[0] == 'D') && (identifier[1] == 'P') && (identifier[2] == 'M') && (identifier[3] == 'X')))
{
return(false);
}
reader.BaseStream.Seek(startPosition, SeekOrigin.Begin);
reader.ReadInt32();
reader.ReadInt32();
int fileCount = reader.ReadInt32();
reader.ReadInt32();
files.Capacity = fileCount;
fileOffsetStart = startPosition + 0x10 + fileCount * 0x20;
for (int i = 0; i < fileCount; i++)
{
DpmFileState file = new DpmFileState();
Char[] chars = reader.ReadChars(16);
int stringLength = 16;
for (int j = 0; j < 16; j++)
{
if (chars[j] == '\0')
{
stringLength = j;
break;
}
}
file.FileName = new string(chars, 0, stringLength);
file.unknown = reader.ReadInt32();
file.Encryptionkey = reader.ReadInt32();
file.FileOffset = reader.ReadInt32();
file.FileSize = reader.ReadInt32();
file.Parent = this;
if ((file.FileOffset + file.FileSize) > (streamLength))
{
return(false);
}
files.Add(file);
}
return(true);
}
