HandlerInfo getHandlerArgs41(MethodDef handler)
{
var instrs = handler.Body.Instructions;
for (int i = 0; i < instrs.Count; i++)
{
var instr = instrs[i];
if (instr.OpCode.Code != Code.Call)
{
continue;
}
var calledMethod = instr.Operand as MethodDef;
if (calledMethod == null)
{
continue;
}
if (getLdtokenField(calledMethod) == null)
{
continue;
}
var args = DsUtils.getArgValues(instrs, i);
if (args == null)
{
continue;
}
return(new HandlerInfo(calledMethod, args));
}
return(null);
}
// 4.0.4, 4.1+
Version checkHandlerV404_41(MethodDef handler, out List <FieldInfo> fieldInfos, out MethodDef decryptMethod)
{
Version version = Version.Unknown;
fieldInfos = new List <FieldInfo>();
decryptMethod = null;
var instrs = handler.Body.Instructions;
for (int i = 0; i < instrs.Count - 6; i++)
{
int index = i;
var ldci4_len = instrs[index++];
if (!ldci4_len.IsLdcI4())
{
continue;
}
if (instrs[index++].OpCode.Code != Code.Newarr)
{
continue;
}
if (!instrs[index++].IsStloc())
{
continue;
}
if (!instrs[index++].IsLdloc())
{
continue;
}
var ldtoken = instrs[index++];
if (ldtoken.OpCode.Code != Code.Ldtoken)
{
continue;
}
var field = ldtoken.Operand as FieldDef;
if (field == null || field.InitialValue == null || field.InitialValue.Length == 0)
{
continue;
}
var call1 = instrs[index++];
if (call1.OpCode.Code != Code.Call)
{
continue;
}
if (!DotNetUtils.isMethod(call1.Operand as IMethod, "System.Void", "(System.Array,System.RuntimeFieldHandle)"))
{
continue;
}
int callIndex = getCallDecryptMethodIndex(instrs, index);
if (callIndex < 0)
{
continue;
}
var args = DsUtils.getArgValues(instrs, callIndex);
if (args == null)
{
continue;
}
var decryptMethodTmp = instrs[callIndex].Operand as MethodDef;
if (decryptMethodTmp == null)
{
continue;
}
int magic;
Version versionTmp;
getMagic(decryptMethodTmp, args, out versionTmp, out magic);
version = versionTmp;
decryptMethod = decryptMethodTmp;
fieldInfos.Add(new FieldInfo(field, magic));
}
return(version);
}