protected virtual byte[] GenerateHashData(ASInstance instance, bool isOutgoing)
{
using (var binStream = new MemoryStream())
using (var binWriter = new BinaryWriter(binStream))
{
binWriter.Write(GenerateHashData(instance));
if (!isOutgoing)
{
ASMethod constructor = instance.Constructor;
ASCode ctorCode = constructor.Body.Code;
if (constructor.Parameters.Count < 2)
{
using (var inCode = new FlashReader(ctorCode.ToArray()))
{
while (inCode.Position != inCode.Length)
{
OPCode op = inCode.ReadOP();
object[] values = inCode.ReadValues(op);
if (op == OPCode.GetLex)
{
ASMultiname classParamTypeName = _abcFiles[2]
.Constants.Multinames[(int)values[0]];
ASInstance inMsgParser = _abcFiles[2]
.FindInstanceByName(classParamTypeName.ObjName);
if (inCode.ReadOP() == OPCode.ConstructSuper)
binWriter.Write(GenerateHashData(inMsgParser));
break;
}
}
}
}
}
binWriter.Close();
return binStream.ToArray();
}
}
protected ASMethod FindVerifyMethod(ASInstance instance, ABCFile abc, out int rsaStart)
{
List<MethodGetterSetterTrait> methodTraits =
instance.FindTraits<MethodGetterSetterTrait>(TraitType.Method);
rsaStart = -1;
foreach (MethodGetterSetterTrait mgsTrait in methodTraits)
{
ASMethod method = mgsTrait.Method;
if (method.ReturnType.ObjName != "void") continue;
if (method.Parameters.Count != 1) continue;
ASCode methodCode = method.Body.Code;
using (var code = new FlashReader(methodCode.ToArray()))
{
while (code.Position != code.Length)
{
OPCode op = code.ReadOP();
if (op != OPCode.GetLex) continue;
int typeIndex = code.Read7BitEncodedInt();
ASMultiname type = abc.Constants.Multinames[typeIndex];
if (type?.ObjName == "RSAKey")
{
rsaStart = code.Position;
return method;
}
}
}
}
return null;
}
public string GenerateHash(ASInstance instance, bool isOutgoing)
{
using (var md5 = MD5.Create())
{
return BitConverter.ToString(
md5.ComputeHash(GenerateHashData(instance, isOutgoing)))
.Replace("-", string.Empty).ToLower();
}
}
protected virtual byte[] GenerateHashData(ASInstance instance)
{
using (var binStream = new MemoryStream())
using (var binWriter = new BinaryWriter(binStream, Encoding.UTF8, true))
{
binWriter.Write("INSTANCE");
binWriter.Write(instance.InterfaceIndices.Count);
binWriter.Write("TRAITS");
WriteTraits(binWriter, instance.Traits);
binWriter.Write("CONSTRUCTOR");
WriteMethod(binWriter, instance.Constructor);
binWriter.Close();
return binStream.ToArray();
}
}
