protected void ReplaceNextOperation(FlashReader inCode, FlashWriter outCode, ASMethod method, OPCode oldOP, object[] oldValues, OPCode newOP, object[] newValues)
{
while (inCode.IsDataAvailable)
{
OPCode op = inCode.ReadOP();
object[] values = inCode.ReadValues(op);
if (op != oldOP)
{
outCode.WriteOP(op, values);
continue;
}
if (oldValues != null && (oldValues.Length == values.Length))
{
bool valuesMatch = true;
for (int i = 0; i < oldValues.Length; i++)
{
if (oldValues[i] != null &&
!oldValues[i].Equals(values[i]))
{
valuesMatch = false;
break;
}
}
if (!valuesMatch)
{
outCode.WriteOP(op, values);
continue;
}
}
outCode.WriteOP(newOP, newValues);
WriteLog($"Replaced operation '{oldOP}[{string.Join(", ", oldValues)}]' with '{newOP}[{string.Join(", ", newValues)}]' in method '{method}'.");
break;
}
}
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);
}
protected void RemoveDeadFalseConditions(ASMethodBody body)
{
using (var inCode = new FlashReader(body.Bytecode))
using (var outCode = new FlashWriter(inCode.Length))
{
while (inCode.Position != inCode.Length)
{
OPCode op = inCode.ReadOP();
if (op != OPCode.PushFalse)
{
outCode.WriteOP(op);
continue;
}
op = inCode.ReadOP();
if (op != OPCode.PushFalse)
{
outCode.WriteOP(OPCode.PushFalse);
outCode.WriteOP(op);
continue;
}
op = inCode.ReadOP();
if (op != OPCode.IfNe)
{
outCode.WriteOP(OPCode.PushFalse);
outCode.WriteOP(OPCode.PushFalse);
outCode.WriteOP(op);
continue;
}
else
{
inCode.ReadS24();
}
}
body.Bytecode = outCode.ToArray();
}
}
protected void FixLocalRegisters(ASMethod method)
{
// But, what about nested branches? Does not work with those yet, sadly.
if (method.Body == null)
{
return;
}
if (method.Body.LocalCount == (1 + method.Parameters.Count))
{
return;
}
ABCFile abc = method.ABC;
using (var outCode = new FlashWriter())
using (var inCode = new FlashReader(method.Body.Bytecode))
{
uint jumpValue = 0;
int jumpValueEnd = 0;
int jumpValueStart = 0;
int totalDifference = 0;
bool isJumpingOver = false;
var labelPositions = new Stack <int>();
while (inCode.IsDataAvailable)
{
if (isJumpingOver && inCode.Position >= jumpValueEnd)
{
isJumpingOver = false;
}
OPCode op = inCode.ReadOP();
object[] values = inCode.ReadValues(op);
if (op != OPCode.Debug || ((byte)values[0] != 1))
{
if (IsJumpInstruction(op)) // If a label position is contained in the stack, the next jump instruction will go backwards.
{
// Not a backwards jump, also check to make sure the jump value isn't crazy big, otherwise it might be a reverse jump instruction.
// If large: (uint.MaxValue - value[0]) == Bytes to jump back to get to the last saved label position in stack.
if (labelPositions.Count == 0 || ((uint)values[0] <= inCode.Length))
{
isJumpingOver = true;
jumpValue = (uint)values[0]; // To later check if we're in the middle of the jumping range.
jumpValueStart = (outCode.Position + 1); // To re-write the jump value if the data in-between has sgrown.
jumpValueEnd = (int)(inCode.Position + jumpValue);
}
else
{
// Find by how many bytes we need to move back from current position.
values[0] = (uint)(uint.MaxValue -
((outCode.Position + 4) - labelPositions.Pop()));
}
}
else if (op == OPCode.Label) // Store label positions, to easily determine by how many bytes we need to jump back to this position.
{
labelPositions.Push(outCode.Position + 1);
}
outCode.WriteOP(op, values);
continue;
}
var local = (byte)values[2];
if (local > method.Parameters.Count)
{
values[1] = abc.Constants
.AddString("local" + local);
}
outCode.WriteOP(op, values);
int difference = (((inCode.Position - outCode.Length) * -1) - totalDifference);
totalDifference += difference;
if (isJumpingOver)
{
int curPos = outCode.Position;
outCode.Position = jumpValueStart;
outCode.WriteS24(jumpValue += (uint)difference); // PlusEqual the value, in-case we've already modifed within the jumping range.
outCode.Position = curPos;
}
}
method.Body.Bytecode = outCode.ToArray();
}
}
/// <summary>
/// Modifies the bytecode to allow the client to connect to anywhere.
/// </summary>
public void BypassRemoteHostCheck()
{
ABCFile abc = ABCFiles[2];
ASInstance habboCommMngr = abc.FindFirstInstanceByName("HabboCommunicationManager");
if (habboCommMngr == null)
{
return;
}
int hostValueSlotObjTypeIndex = -1;
string hostValueSlotObjName = string.Empty;
foreach (ASTrait trait in habboCommMngr.Traits)
{
if (trait.TraitType != TraitType.Slot)
{
continue;
}
if (((SlotConstantTrait)trait.Data).TypeName.Name != "String")
{
continue;
}
hostValueSlotObjName = trait.Name.Name;
hostValueSlotObjTypeIndex = trait.NameIndex;
break;
}
ASMethod initCompMethod = habboCommMngr
.FindFirstMethod("initComponent", "void");
int getPropertyObjTypeIndex = abc.Constants
.IndexOfMultiname("getProperty");
ASMethod initConnectionMethod = null;
using (var outCode = new FlashWriter())
using (var inCode = new FlashReader(initCompMethod.Body.Bytecode))
{
object[] values = inCode.ReadValuesUntil(OPCode.CallPropVoid, null, 0);
if (values == null)
{
return;
}
CopyBytecode(inCode, outCode, 0, inCode.Position);
outCode.WriteOP(OPCode.GetLocal_0);
outCode.WriteOP(OPCode.FindPropStrict, getPropertyObjTypeIndex);
outCode.WriteOP(OPCode.PushString, abc.Constants.AddString("connection.info.host"));
outCode.WriteOP(OPCode.CallProperty, getPropertyObjTypeIndex, 1);
outCode.WriteOP(OPCode.InitProperty, hostValueSlotObjTypeIndex);
WriteLog($"Method '{initCompMethod}' modified to include '{hostValueSlotObjName} = getProperty(\"connection.info.host\");'.");
CopyBytecode(inCode, outCode);
initCompMethod.Body.Bytecode = outCode.ToArray();
values = inCode.ReadValuesUntil(OPCode.CallPropVoid);
ASMultiname callPropVoidType = abc.Constants.Multinames[(int)values[0]];
initConnectionMethod = habboCommMngr.FindFirstMethod(callPropVoidType.Name, "void");
}
using (var outCode = new FlashWriter())
using (var inCode = new FlashReader(initConnectionMethod.Body.Bytecode))
{
int ifNeCount = 0;
int byteJumpCountPos = 0;
int differenceOffset = 0;
uint byteJumpCountValue = 0;
int magicNumberIndex = abc.Constants.AddInteger(65290);
while (inCode.IsDataAvailable)
{
OPCode op = inCode.ReadOP();
object[] values = null;
if (op != OPCode.PushInt)
{
values = inCode.ReadValues(op);
outCode.WriteOP(op, values);
if (op == OPCode.IfNe &&
(++ifNeCount == 2 || ifNeCount == 4))
{
byteJumpCountPos = (outCode.Position - 3);
byteJumpCountValue = (uint)values[0];
}
continue;
}
bool isFinalPushInt = false;
int pushIntIndex = inCode.Read7BitEncodedInt();
int pushIntValue = abc.Constants.Integers[pushIntIndex];
#region Switch: pushIntValue
switch (pushIntValue)
{
case 65244: //97
case 65185: //32
case 65191: //175
case 65189: //123
case 65188: //164
case 65174: //45
case 65238: //297
case 65184: //127
case 65171: //20
case 65172: //58
{
pushIntIndex = magicNumberIndex;
isFinalPushInt = (pushIntValue == 65172);
break;
}
}
#endregion
outCode.WriteOP(op, pushIntIndex);
int byteDifference = (((inCode.Position - outCode.Length) * -1) - differenceOffset);
if (isFinalPushInt)
{
int curPos = outCode.Position;
differenceOffset += byteDifference;
outCode.Position = byteJumpCountPos;
outCode.WriteS24(byteJumpCountValue + (uint)byteDifference);
outCode.Position = curPos;
if (ifNeCount == 4)
{
CopyBytecode(inCode, outCode);
initConnectionMethod.Body.Bytecode = outCode.ToArray();
WriteLog($"Method '{initConnectionMethod}' modified to not append suffix to the host value.");
return;
}
}
}
}
}
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 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);
}