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AS3 better deobfuscation

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Jindra Petk
2013-04-15 19:54:55 +02:00
parent f85f2cca27
commit b63ac1cd4a
2 changed files with 21 additions and 6 deletions
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21
trunk/src/com/jpexs/decompiler/flash/abc/avm2/AVM2Code.java
View File

@@ -2411,11 +2411,22 @@ public class AVM2Code implements Serializable {
public boolean skipUsed = false;
}
private static int removeTraps(boolean secondPass, boolean useVisited, List localData, Stack<GraphTargetItem> stack, List<GraphTargetItem> output, AVM2GraphSource code, int ip, int lastIp, List<Integer> visited, HashMap<GraphSourceItem, Decision> decisions) {
private static int removeTraps(boolean secondPass, boolean useVisited, List localData, Stack<GraphTargetItem> stack, List<GraphTargetItem> output, AVM2GraphSource code, int ip, int lastIp, List<Integer> visited, HashMap<Integer, HashMap<Integer, GraphTargetItem>> visitedStates, HashMap<GraphSourceItem, Decision> decisions) {
boolean debugMode = false;
int ret = 0;
iploop:
while ((ip > -1) && ip < code.size()) {
HashMap<Integer, GraphTargetItem> currentState = (HashMap<Integer, GraphTargetItem>) localData.get(2);
if (visitedStates.containsKey(ip)) {
HashMap<Integer, GraphTargetItem> lastState = visitedStates.get(ip);
if (lastState.equals(currentState)) {
break;
}
}
visitedStates.put(ip, (HashMap<Integer, GraphTargetItem>) currentState.clone());
if (useVisited && visited.contains(ip)) {
break;
}
@@ -2536,7 +2547,7 @@ public class AVM2Code implements Serializable {
}
}
ret += removeTraps(secondPass, useVisited, localData, stack, output, code, condition ? branches.get(0) : branches.get(1), ip, visited, decisions);
ret += removeTraps(secondPass, useVisited, localData, stack, output, code, condition ? branches.get(0) : branches.get(1), ip, visited, visitedStates, decisions);
} else {
if (ins.isBranch() && (!ins.isJump())) {
stack.pop();
@@ -2545,7 +2556,7 @@ public class AVM2Code implements Serializable {
for (int b : branches) {
Stack<GraphTargetItem> brStack = (Stack<GraphTargetItem>) stack.clone();
if (b >= 0) {
ret += removeTraps(secondPass, useVisited || (!ins.isJump()), localData, brStack, output, code, b, ip, visited, decisions);
ret += removeTraps(secondPass, useVisited || (!ins.isJump()), localData, brStack, output, code, b, ip, visited, visitedStates, decisions);
} else {
if (debugMode) {
System.out.println("Negative branch:" + b);
@@ -2565,7 +2576,7 @@ public class AVM2Code implements Serializable {
public static int removeTraps(List localData, AVM2GraphSource code, int addr) {
HashMap<GraphSourceItem, AVM2Code.Decision> decisions = new HashMap<GraphSourceItem, AVM2Code.Decision>();
removeTraps(false, false, localData, new Stack<GraphTargetItem>(), new ArrayList<GraphTargetItem>(), code, code.adr2pos(addr), 0, new ArrayList<Integer>(), decisions);
return removeTraps(true, false, localData, new Stack<GraphTargetItem>(), new ArrayList<GraphTargetItem>(), code, code.adr2pos(addr), 0, new ArrayList<Integer>(), decisions);
removeTraps(false, false, localData, new Stack<GraphTargetItem>(), new ArrayList<GraphTargetItem>(), code, code.adr2pos(addr), 0, new ArrayList<Integer>(), new HashMap<Integer, HashMap<Integer, GraphTargetItem>>(), decisions);
return removeTraps(true, false, localData, new Stack<GraphTargetItem>(), new ArrayList<GraphTargetItem>(), code, code.adr2pos(addr), 0, new ArrayList<Integer>(), new HashMap<Integer, HashMap<Integer, GraphTargetItem>>(), decisions);
}
}

6
trunk/src/com/jpexs/decompiler/flash/abc/types/MethodBody.java
View File

@@ -16,6 +16,7 @@
*/
package com.jpexs.decompiler.flash.abc.types;
import com.jpexs.decompiler.flash.Configuration;
import com.jpexs.decompiler.flash.Main;
import com.jpexs.decompiler.flash.abc.ABC;
import com.jpexs.decompiler.flash.abc.avm2.AVM2Code;
@@ -42,6 +43,7 @@ public class MethodBody implements Cloneable, Serializable {
public AVM2Code code;
public ABCException exceptions[] = new ABCException[0];
public Traits traits = new Traits();
private static boolean AUTO_DEOBFUSCATE = (Boolean) Configuration.getConfig("autoDeobfuscate", true);
public List<Integer> getExceptionEntries() {
List<Integer> ret = new ArrayList<Integer>();
@@ -115,7 +117,9 @@ public class MethodBody implements Cloneable, Serializable {
MethodBody b = (MethodBody) Helper.deepCopy(this);
deobfuscated = b.code;
deobfuscated.markMappedOffsets();
deobfuscated.removeTraps(constants, b, abc);
if (AUTO_DEOBFUSCATE) {
deobfuscated.removeTraps(constants, b, abc);
}
//deobfuscated.restoreControlFlow(constants, b);
try {
s += deobfuscated.toSource(path, isStatic, classIndex, abc, constants, method_info, b, hilight, getLocalRegNames(abc), scopeStack, isStaticInitializer, fullyQualifiedNames, initTraits);