public ASNamespaceSet(ABCFile abc, FlashReader reader)
: this(abc)
{
NamespaceIndices.Capacity = reader.Read7BitEncodedInt();
for (int i = 0; i < NamespaceIndices.Capacity; i++)
NamespaceIndices.Add(reader.Read7BitEncodedInt());
}
public ASScript(ABCFile abc, FlashReader reader)
: this(abc)
{
FunctionIndex = reader.Read7BitEncodedInt();
Traits.Capacity = reader.Read7BitEncodedInt();
for (int i = 0; i < Traits.Capacity; i++)
Traits.Add(new ASTrait(abc, reader));
}
public Typename(ABCFile abc, FlashReader reader)
: this(abc)
{
TypeIndex = reader.Read7BitEncodedInt();
ParameterTypeIndices.Capacity = reader.Read7BitEncodedInt();
for (int i = 0; i < ParameterTypeIndices.Capacity; i++)
ParameterTypeIndices.Add(reader.Read7BitEncodedInt());
}
public ASException(ABCFile abc, FlashReader reader)
: this(abc)
{
From = reader.Read7BitEncodedInt();
To = reader.Read7BitEncodedInt();
Target = reader.Read7BitEncodedInt();
ExceptionTypeIndex = reader.Read7BitEncodedInt();
VariableNameIndex = reader.Read7BitEncodedInt();
}
public ASClass(ABCFile abc, FlashReader reader)
: this(abc)
{
ConstructorIndex = reader.Read7BitEncodedInt();
if (Constructor != null) Constructor.IsConstructor = true;
Traits.Capacity = reader.Read7BitEncodedInt();
for (int i = 0; i < Traits.Capacity; i++)
Traits.Add(new ASTrait(abc, reader));
}
public SlotConstantTrait(ABCFile abc, FlashReader reader, TraitType traitType)
: this(abc, traitType)
{
SlotId = reader.Read7BitEncodedInt();
TypeIndex = reader.Read7BitEncodedInt();
ValueIndex = reader.Read7BitEncodedInt();
if (ValueIndex != 0)
ValueType = (ConstantType)reader.ReadByte();
}
public ASMetadata(ABCFile abc, FlashReader reader)
: this(abc)
{
ObjNameIndex = reader.Read7BitEncodedInt();
Elements.Capacity = reader.Read7BitEncodedInt();
for (int i = 0; i < Elements.Capacity; i++)
{
int elementKey = reader.Read7BitEncodedInt();
int elementValue = reader.Read7BitEncodedInt();
Elements.Add(new Tuple<int, int>(elementKey, elementValue));
}
}
public ASTrait(ABCFile abc, FlashReader reader)
: this(abc)
{
TypeIndex = reader.Read7BitEncodedInt();
byte trueKind = reader.ReadByte();
var traitType = (TraitType)(trueKind & 0xF);
Attributes = (TraitAttributes)(trueKind >> 4);
#region Trait Reading
switch (traitType)
{
case TraitType.Slot:
case TraitType.Constant:
{
Data = new SlotConstantTrait(abc, reader, traitType)
{ ObjName = Type.ObjName };
break;
}
case TraitType.Method:
case TraitType.Getter:
case TraitType.Setter:
{
Data = new MethodGetterSetterTrait(abc, reader, traitType)
{ ObjName = Type.ObjName };
((MethodGetterSetterTrait)Data).Method.ObjName = ObjName;
break;
}
case TraitType.Class:
{
Data = new ClassTrait(abc, reader)
{ ObjName = Type.ObjName };
break;
}
case TraitType.Function:
{
Data = new FunctionTrait(abc, reader)
{ ObjName = Type.ObjName };
break;
}
default:
throw new Exception($"Invalid {nameof(ASTrait)} type: " + traitType);
}
#endregion
if ((Attributes & TraitAttributes.Metadata) != 0)
MetadataIndices.Capacity = reader.Read7BitEncodedInt();
for (int i = 0; i < MetadataIndices.Capacity; i++)
MetadataIndices.Add(reader.Read7BitEncodedInt());
}
public bool FindMessageInstances()
{
if (OutgoingTypes.Count > 0 &&
IncomingTypes.Count > 0) return true;
ABCFile abc = ABCFiles[2];
ASClass habboMessages = abc.FindClassByName("HabboMessages");
if (habboMessages == null || habboMessages.Traits.Count < 2) return false;
ASTrait incomingMap = habboMessages.Traits[0];
ASTrait outgoingMap = habboMessages.Traits[1];
using (var mapReader = new FlashReader(
habboMessages.Constructor.Body.Bytecode.ToArray()))
{
while (mapReader.Position != mapReader.Length)
{
OPCode op = mapReader.ReadOP();
if (op != OPCode.GetLex) continue;
int mapTypeIndex = mapReader.Read7BitEncodedInt();
bool isOutgoing = (mapTypeIndex == outgoingMap.TypeIndex);
bool isIncoming = (mapTypeIndex == incomingMap.TypeIndex);
if (!isOutgoing && !isIncoming) continue;
op = mapReader.ReadOP();
if (op != OPCode.PushShort && op != OPCode.PushByte) continue;
ushort header = 0;
if (op == OPCode.PushByte)
{
header = mapReader.ReadByte();
}
else header = (ushort)mapReader.Read7BitEncodedInt();
op = mapReader.ReadOP();
if (op != OPCode.GetLex) continue;
int messageTypeIndex = mapReader.Read7BitEncodedInt();
ASMultiname messageType = abc.Constants.Multinames[messageTypeIndex];
ASClass messageInstance = abc.FindClassByName(messageType.ObjName);
if (isOutgoing) OutgoingTypes[header] = messageInstance;
else if (isIncoming) IncomingTypes[header] = messageInstance;
}
}
return (OutgoingTypes.Count > 0 &&
IncomingTypes.Count > 0);
}
public ABCFile(FlashReader reader)
{
_reader = reader;
MinorVersion = _reader.ReadUInt16();
MajorVersion = _reader.ReadUInt16();
Constants = new ASConstants(this, _reader);
Constants.ReadConstants();
Methods = new List<ASMethod>(_reader.Read7BitEncodedInt());
for (int i = 0; i < Methods.Capacity; i++)
Methods.Add(new ASMethod(this, _reader));
Metadata = new List<ASMetadata>(_reader.Read7BitEncodedInt());
for (int i = 0; i < Metadata.Capacity; i++)
Metadata.Add(new ASMetadata(this, _reader));
Instances = new List<ASInstance>(_reader.Read7BitEncodedInt());
for (int i = 0; i < Instances.Capacity; i++)
Instances.Add(new ASInstance(this, _reader));
Classes = new List<ASClass>(Instances.Capacity);
for (int i = 0; i < Classes.Capacity; i++)
{
Classes.Add(new ASClass(this, _reader));
Classes[i].Instance = Instances[i];
}
Scripts = new List<ASScript>(_reader.Read7BitEncodedInt());
for (int i = 0; i < Scripts.Capacity; i++)
Scripts.Add(new ASScript(this, _reader));
MethodBodies = new List<ASMethodBody>(_reader.Read7BitEncodedInt());
for (int i = 0; i < MethodBodies.Capacity; i++)
MethodBodies.Add(new ASMethodBody(this, _reader));
}
public ASInstance(ABCFile abc, FlashReader reader)
: this(abc)
{
TypeIndex = reader.Read7BitEncodedInt();
SuperTypeIndex = reader.Read7BitEncodedInt();
ClassInfo = (ClassFlags)reader.ReadByte();
if ((ClassInfo & ClassFlags.ProtectedNamespace) != 0)
ProtectedNamespaceIndex = reader.Read7BitEncodedInt();
InterfaceIndices.Capacity = reader.Read7BitEncodedInt();
for (int i = 0; i < InterfaceIndices.Capacity; i++)
InterfaceIndices.Add(reader.Read7BitEncodedInt());
ConstructorIndex = reader.Read7BitEncodedInt();
if (Constructor != null) Constructor.IsConstructor = true;
Traits.Capacity = reader.Read7BitEncodedInt();
for (int i = 0; i < Traits.Capacity; i++)
Traits.Add(new ASTrait(abc, reader));
}
public ASMethod(ABCFile abc, FlashReader reader)
: this(abc)
{
Parameters.Capacity = reader.Read7BitEncodedInt();
ReturnTypeIndex = reader.Read7BitEncodedInt();
for (int i = 0; i < Parameters.Capacity; i++)
{
int parameterTypeIndex = reader.Read7BitEncodedInt();
var parameter = new ASParameter(abc, parameterTypeIndex);
Parameters.Add(parameter);
parameter.Rank = Parameters.Count;
}
NameIndex = reader.Read7BitEncodedInt();
MethodInfo = (MethodFlags)reader.ReadByte();
if (MethodInfo.HasFlag(MethodFlags.HasOptional))
{
int optionalParamCount = reader.Read7BitEncodedInt();
while (optionalParamCount > 0)
{
int paramIndex = ((Parameters.Count - 1) - (--optionalParamCount));
ASParameter optionalParameter = Parameters[paramIndex];
optionalParameter.IsOptional = true;
optionalParameter.ValueIndex = reader.Read7BitEncodedInt();
optionalParameter.ValueType = (ConstantType)reader.ReadByte();
}
}
if (MethodInfo.HasFlag(MethodFlags.HasParamNames))
{
foreach (ASParameter parameter in Parameters)
parameter.ObjNameIndex = reader.Read7BitEncodedInt();
}
}
public MultinameL(ABCFile abc, FlashReader reader, ConstantType multinameType)
: this(abc, multinameType)
{
NamespaceSetIndex = reader.Read7BitEncodedInt();
}
public RTQName(ABCFile abc, FlashReader reader, ConstantType multinameType)
: this(abc, multinameType)
{
ObjNameIndex = reader.Read7BitEncodedInt();
}
public bool BypassRemoteHostCheck()
{
ABCFile abc = ABCFiles[2];
ASInstance commManager = abc.FindInstanceByName("HabboCommunicationManager");
if (commManager == null) return false;
// The "host" value is always the first slot, for now.
string hostValueSlotName = commManager.FindTraits<SlotConstantTrait>(TraitType.Slot)
.Where(t => t.Type.ObjName == "String").ToArray()[0].ObjName;
ASMethod initComponent = commManager.FindMethod("initComponent", "void").Method;
if (initComponent == null) return false;
using (var inCode = new FlashReader(initComponent.Body.Bytecode))
using (var outCode = new FlashWriter(inCode.Length))
{
int hostSlotIndex = abc.Constants.IndexOfMultiname(hostValueSlotName);
while (inCode.Position != inCode.Length)
{
OPCode op = inCode.ReadOP();
outCode.WriteOP(op);
if (op != OPCode.GetLocal_0) continue;
op = inCode.ReadOP();
outCode.WriteOP(op);
if (op != OPCode.CallPropVoid) continue;
int callPropVoidIndex = inCode.Read7BitEncodedInt();
outCode.Write7BitEncodedInt(callPropVoidIndex);
int callPropVoidArgCount = inCode.Read7BitEncodedInt();
outCode.Write7BitEncodedInt(callPropVoidArgCount);
if (callPropVoidArgCount != 0) continue;
int getPropertyNameIndex = abc.Constants
.IndexOfMultiname("getProperty");
outCode.WriteOP(OPCode.GetLocal_0);
outCode.WriteOP(OPCode.FindPropStrict);
outCode.Write7BitEncodedInt(getPropertyNameIndex);
outCode.WriteOP(OPCode.PushString);
outCode.Write7BitEncodedInt(abc.Constants.AddString("connection.info.host"));
outCode.WriteOP(OPCode.CallProperty);
outCode.Write7BitEncodedInt(getPropertyNameIndex);
outCode.Write7BitEncodedInt(1);
outCode.WriteOP(OPCode.InitProperty);
outCode.Write7BitEncodedInt(hostSlotIndex);
outCode.Write(inCode.ToArray(),
inCode.Position, inCode.Length - inCode.Position);
do op = inCode.ReadOP();
while (op != OPCode.CallPropVoid);
callPropVoidIndex = inCode.Read7BitEncodedInt();
ASMultiname callPropVoidName = abc.Constants.Multinames[callPropVoidIndex];
ASMethod connectMethod = commManager.FindMethod(callPropVoidName.ObjName, "void").Method;
RemoveHostSuffix(abc, connectMethod);
initComponent.Body.Bytecode = outCode.ToArray();
return true;
}
}
return false;
}
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;
using (var code = new FlashReader(method.Body.Bytecode))
{
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 bool ReplaceRSA(int exponent, string modulus)
{
ABCFile abc = ABCFiles[2];
int modulusIndex = abc.Constants.AddString(modulus);
int exponentIndex = abc.Constants
.AddString(exponent.ToString("x"));
int rsaStart = 0;
ASInstance commClass = abc.FindInstanceByName("HabboCommunicationDemo");
ASMethod verifier = FindVerifyMethod(commClass, abc, out rsaStart);
using (var inCode = new FlashReader(verifier.Body.Bytecode))
using (var outCode = new FlashWriter(inCode.Length))
{
bool searchingKeys = true;
inCode.Position = rsaStart;
outCode.Write(inCode.ToArray(), 0, rsaStart);
while (inCode.Position != inCode.Length)
{
byte codeByte = inCode.ReadByte();
outCode.Write(codeByte);
if (!searchingKeys)
{
outCode.Write(inCode.ToArray(),
inCode.Position, inCode.Length - inCode.Position);
break;
}
switch ((OPCode)codeByte)
{
case OPCode.GetLex:
{
outCode.Position--;
outCode.WriteOP(OPCode.PushString);
int typeIndex = inCode.Read7BitEncodedInt();
ASMultiname type = abc.Constants.Multinames[typeIndex];
inCode.ReadOP();
inCode.Read7BitEncodedInt();
inCode.Read7BitEncodedInt();
if (modulusIndex > 0)
{
outCode.Write7BitEncodedInt(modulusIndex);
modulusIndex = -1;
}
else if (searchingKeys)
{
outCode.Write7BitEncodedInt(exponentIndex);
searchingKeys = false;
}
break;
}
case OPCode.PushString:
{
int stringIndex = inCode.Read7BitEncodedInt();
string value = abc.Constants.Strings[stringIndex];
if (string.IsNullOrWhiteSpace(Modulus))
{
Modulus = value;
outCode.Write7BitEncodedInt(modulusIndex);
}
else if (string.IsNullOrWhiteSpace(Exponent))
{
Exponent = value;
outCode.Write7BitEncodedInt(exponentIndex);
searchingKeys = false;
}
break;
}
default: continue;
}
}
verifier.Body.Bytecode = outCode.ToArray();
if (!searchingKeys) return true;
}
return false;
}
public bool DisableExpirationDateCheck()
{
ABCFile abc = ABCFiles[2];
ASInstance windowContext = abc.FindInstanceByName("WindowContext");
if (windowContext == null) return false;
using (var inCode = new FlashReader(windowContext.Constructor.Body.Bytecode))
using (var outCode = new FlashWriter())
{
int setLocal11Itterations = 0;
while (inCode.Position != inCode.Length)
{
OPCode op = inCode.ReadOP();
outCode.WriteOP(op);
if (op != OPCode.SetLocal) continue;
int setLocalIndex = inCode.Read7BitEncodedInt();
outCode.Write7BitEncodedInt(setLocalIndex);
if (setLocalIndex != 11 || (++setLocal11Itterations != 2)) continue;
outCode.WriteOP(OPCode.ReturnVoid);
outCode.Write(inCode.ToArray(), inCode.Position,
inCode.Length - inCode.Position);
windowContext.Constructor.Body.Bytecode = outCode.ToArray();
return true;
}
}
return false;
}
protected void RemoveHostSuffix(ABCFile abc, ASMethod connectMethod)
{
using (var inCode = new FlashReader(connectMethod.Body.Bytecode))
using (var outCode = new FlashWriter(inCode.Length))
{
int ifNeCount = 0;
while (inCode.Position != inCode.Length)
{
OPCode op = inCode.ReadOP();
outCode.WriteOP(op);
if (op == OPCode.IfNe && ++ifNeCount == 2)
{
var iFNeJumpCount = (int)inCode.ReadS24();
outCode.WriteS24(iFNeJumpCount + 6);
continue;
}
else if (op != OPCode.PushInt) continue;
int pushIntIndex = inCode.Read7BitEncodedInt();
int integerValue = abc.Constants.Integers[pushIntIndex];
switch (integerValue)
{
case 65244:
case 65185:
case 65191:
case 65189:
case 65188:
case 65174:
case 65238:
case 65184:
case 65171:
case 65172:
{
pushIntIndex = abc.Constants.AddInteger(65290);
break;
}
}
outCode.Write7BitEncodedInt(pushIntIndex);
}
connectMethod.Body.Bytecode = outCode.ToArray();
}
RemoveDeadFalseConditions(connectMethod.Body);
}
public ClassTrait(ABCFile abc, FlashReader reader) :
this(abc)
{
SlotId = reader.Read7BitEncodedInt();
ClassIndex = reader.Read7BitEncodedInt();
}
public MethodGetterSetterTrait(ABCFile abc, FlashReader reader, TraitType traitType)
: this(abc, traitType)
{
DispId = reader.Read7BitEncodedInt();
MethodIndex = reader.Read7BitEncodedInt();
}
public FunctionTrait(ABCFile abc, FlashReader reader)
: this(abc)
{
SlotId = reader.Read7BitEncodedInt();
FunctionIndex = reader.Read7BitEncodedInt();
}
public ASNamespace(ABCFile abc, FlashReader reader)
: this(abc)
{
NamespaceType = (ConstantType)reader.ReadByte();
ObjNameIndex = reader.Read7BitEncodedInt();
}