public Dex(Stream dexStream)
{
if (!dexStream.CanSeek)
{
throw new ArgumentException("Must be able to seek the DEX stream");
}
DexStream = dexStream;
DexHeader = DexHeader.Parse(dexStream);
SectionsMap = ReadSectionsMap();
}
internal static DexHeader Parse(Stream dexStream)
{
dexStream.Seek(0, SeekOrigin.Begin);
var reader = new BinaryReader(dexStream);
// Check for the DEX signature in the first bytes of the file
var fileMagic = Encoding.UTF8.GetString(reader.ReadBytes(4));
if (fileMagic.Equals("dey\n"))
{
throw new ArgumentException("Optimized DEX files are not supported");
}
else if (!fileMagic.Equals("dex\n"))
{
throw new ArgumentException(string.Format("Invalid DEX file - wrong signature. Found {0}", fileMagic));
}
DexHeader header = new DexHeader();
header.ApiVersion = Encoding.UTF8.GetString(reader.ReadBytes(4));
header.Checksum = reader.ReadUInt32();
header.Signature = reader.ReadBytes(20);
header.FileSize = reader.ReadUInt32();
header.HeaderSize = reader.ReadUInt32();
header.IsLittleEndian = reader.ReadUInt32() == 0x12345678;
header.LinkSize = reader.ReadUInt32();
header.LinkOffset = reader.ReadUInt32();
header.MapOffset = reader.ReadUInt32();
header.StringIdsCount = reader.ReadUInt32();
header.StringIdsOffset = reader.ReadUInt32();
header.TypeIdsCount = reader.ReadUInt32();
header.TypeIdsOffset = reader.ReadUInt32();
header.PrototypeIdsCount = reader.ReadUInt32();
header.PrototypeIdsOffset = reader.ReadUInt32();
header.FieldIdsCount = reader.ReadUInt32();
header.FieldIdsOffset = reader.ReadUInt32();
header.MethodIdsCount = reader.ReadUInt32();
header.MethodIdsOffset = reader.ReadUInt32();
header.ClassDefinitionsCount = reader.ReadUInt32();
header.ClassDefinitionsOffset = reader.ReadUInt32();
header.DataSize = reader.ReadUInt32();
header.DataOffset = reader.ReadUInt32();
return(header);
}
public void Dispose()
{
DexStream.Dispose(); //.Close();
SectionsMap.Clear();
DexHeader = null;
}