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Ignore method attributes

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This commit is contained in:
de4dot 2012-05-02 18:43:04 +02:00
parent 597fcb0210
commit c61161be1d
1 changed files with 5 additions and 46 deletions
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51
de4dot.code/deobfuscators/DeepSea/DsMethodCallInliner.cs
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@ -71,9 +71,7 @@ namespace de4dot.code.deobfuscators.DeepSea {
}
bool inlineMethod(MethodDefinition methodToInline, int instrIndex, int const1, int const2) {
if (hasSecuritySafeCriticalAttribute(methodToInline))
methodToInline = cflowDeobfuscator.deobfuscate(methodToInline);
this.methodToInline = methodToInline;
this.methodToInline = methodToInline = cflowDeobfuscator.deobfuscate(methodToInline);
parameters = DotNetUtils.getParameters(methodToInline);
arg1 = parameters[parameters.Count - 2];
@ -312,20 +310,10 @@ done:
return false;
var param1 = parameters[paramCount - 1];
var param2 = parameters[paramCount - 2];
if (hasSecuritySafeCriticalAttribute(method)) {
if (!isIntType(param1.ParameterType.EType))
return false;
if (!isIntType(param2.ParameterType.EType))
return false;
}
else {
if (param1.ParameterType.EType != ElementType.I4)
return false;
if (param2.ParameterType.EType != ElementType.I4)
return false;
if (!checkInstrs(method))
return false;
}
if (!isIntType(param1.ParameterType.EType))
return false;
if (!isIntType(param2.ParameterType.EType))
return false;
return true;
}
@ -334,35 +322,6 @@ done:
return etype == ElementType.Char || etype == ElementType.I2 || etype == ElementType.I4;
}
static bool hasSecuritySafeCriticalAttribute(MethodDefinition method) {
return hasAttribute(method, "System.Security.SecuritySafeCriticalAttribute");
}
static bool hasAttribute(MethodDefinition method, string attrName) {
foreach (var attr in method.CustomAttributes) {
if (attr.Constructor.DeclaringType.FullName == attrName)
return true;
}
return false;
}
static bool checkInstrs(MethodDefinition method) {
bool foundSwitch = false, foundXor = false;
foreach (var instr in method.Body.Instructions) {
if (foundSwitch && foundXor)
break;
switch (instr.OpCode.Code) {
case Code.Switch:
foundSwitch = true;
break;
case Code.Xor:
foundXor = true;
break;
}
}
return foundSwitch && foundXor;
}
protected override bool isReturn(MethodDefinition methodToInline, int instrIndex) {
int oldIndex = instrIndex;
if (base.isReturn(methodToInline, oldIndex))