Exemplo n.º 1
0
        public Image(string name)
        {
            this.name = name;
            open      = false;
            reader    = null;

            mdRoot = null;

            dosHdr  = new DOSHeader();
            coffHdr = new COFFHeader();
            peHdr   = new PEHeader();
            corHdr  = new CorHeader();

            sections    = new Hashtable();
            sectionsPos = -1;
        }
Exemplo n.º 2
0
		public Image(string name)
		{
			this.name = name;
			open = false;
			reader = null;

			mdRoot = null;

			dosHdr = new DOSHeader();
			coffHdr = new COFFHeader();
			peHdr = new PEHeader();
			corHdr = new CorHeader();

			sections = new Hashtable();
			sectionsPos = -1;
		}
Exemplo n.º 3
0
        public static uint Calc(string peFile)
        {
            uint res = 0;

            FileInfo pe = new FileInfo(peFile);

            if (!pe.Exists)
            {
                throw new Exception("CheckSum : Invalid file path.");
            }

            using (BinaryReader reader = new BinaryReader(pe.OpenRead())) {
                if (!reader.BaseStream.CanSeek)
                {
                    throw new Exception("Can't seek.");
                }

                DOSHeader  dosHdr  = new DOSHeader();
                COFFHeader coffHdr = new COFFHeader();
                PEHeader   peHdr   = new PEHeader();

                dosHdr.Read(reader);
                reader.BaseStream.Position = dosHdr.Lfanew;
                ExeSignature peSig = (ExeSignature)reader.ReadUInt16();
                if (peSig != ExeSignature.NT)
                {
                    throw new BadImageException("Checksum : Invalid image format, cannot find PE signature.");
                }

                peSig = (ExeSignature)reader.ReadUInt16();
                if (peSig != ExeSignature.NT2)
                {
                    throw new BadImageException("Checksum : Invalid image format, cannot find PE signature.");
                }

                coffHdr.Read(reader);
                peHdr.Read(reader);

                uint oldSum = peHdr.CheckSum;
                reader.BaseStream.Position = 0;
                long len = pe.Length;
                long whole = len >> 1;
                uint sum = 0;
                uint hi, lo;
                for (long i = whole; --i >= 0;)
                {
                    sum += reader.ReadUInt16();
                    hi   = sum >> 16;
                    if (hi != 0)
                    {
                        sum = hi + (sum & 0xFFFF);
                    }
                }
                if ((len & 1L) != 0)
                {
                    sum += (uint)reader.ReadByte();
                    hi   = sum >> 16;
                    if (hi != 0)
                    {
                        sum = hi + (sum & 0xFFFF);
                    }
                }

                // fix low word of checksum
                lo = oldSum & 0xFFFF;
                if ((sum & 0xFFFF) >= lo)
                {
                    sum -= lo;
                }
                else
                {
                    sum = (((sum & 0xFFFF) - lo) & 0xFFFF) - 1;
                }

                // fix high word of checksum
                hi = oldSum >> 16;
                if ((sum & 0xFFFF) >= hi)
                {
                    sum -= hi;
                }
                else
                {
                    sum = (((sum & 0xFFFF) - hi) & 0xFFFF) - 1;
                }
            }

            return(res);
        }
Exemplo n.º 4
0
		public static uint Calc(string peFile)
		{
			uint res = 0;

			FileInfo pe = new FileInfo(peFile);
			if (!pe.Exists) {
				throw new Exception("CheckSum : Invalid file path.");
			}

			using (BinaryReader reader = new BinaryReader(pe.OpenRead())) {
				if (!reader.BaseStream.CanSeek) {
					throw new Exception("Can't seek.");
				}

				DOSHeader dosHdr = new DOSHeader();
				COFFHeader coffHdr = new COFFHeader();
				PEHeader peHdr = new PEHeader();

				dosHdr.Read (reader);
				reader.BaseStream.Position = dosHdr.Lfanew;
				ExeSignature peSig = (ExeSignature) reader.ReadUInt16();
				if (peSig != ExeSignature.NT) {
					throw new BadImageException("Checksum : Invalid image format, cannot find PE signature.");
				}
	
				peSig = (ExeSignature) reader.ReadUInt16();
				if (peSig != ExeSignature.NT2) {
					throw new BadImageException("Checksum : Invalid image format, cannot find PE signature.");
				}

				coffHdr.Read(reader);
				peHdr.Read(reader);

				uint oldSum = peHdr.CheckSum;
				reader.BaseStream.Position = 0;
				long len = pe.Length;
				long whole = len >> 1;
				uint sum = 0;
				uint hi, lo;
				for (long i = whole; --i >= 0;) {
					sum += reader.ReadUInt16();
					hi = sum >> 16;
					if (hi != 0) {
						sum = hi + (sum & 0xFFFF);
					}
				}
				if ((len & 1L) != 0) {
					sum += (uint) reader.ReadByte();
					hi = sum >> 16;
					if (hi != 0) {
						sum = hi + (sum & 0xFFFF);
					}
				}

				// fix low word of checksum
				lo = oldSum & 0xFFFF;
				if ((sum & 0xFFFF) >= lo) {
					sum -= lo;
				} else {
					sum = (((sum & 0xFFFF) - lo) & 0xFFFF) - 1;
				}

				// fix high word of checksum
				hi = oldSum >> 16;
				if ((sum & 0xFFFF) >= hi) {
					sum -= hi;
				} else {
					sum = (((sum & 0xFFFF) - hi) & 0xFFFF) - 1;
				}
			}

			return res;
		}