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Add isCompressed() method

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This commit is contained in:
de4dot 2011-12-20 20:13:37 +01:00
parent 87b4f70de9
commit 4a0a3fb2fc
1 changed files with 10 additions and 4 deletions
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14
de4dot.code/deobfuscators/dotNET_Reactor/QuickLZ.cs
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@ -13,6 +13,14 @@ using System;
namespace de4dot.code.deobfuscators.dotNET_Reactor {
static class QuickLZ {
static int sig = 0x5A4C4351; // "QCLZ"
public static bool isCompressed(byte[] data) {
if (data.Length < 4)
return false;
return BitConverter.ToInt32(data, 0) == sig;
}
static uint read32(byte[] data, int index) {
return BitConverter.ToUInt32(data, index);
}
@ -25,19 +33,17 @@ namespace de4dot.code.deobfuscators.dotNET_Reactor {
static int[] indexInc = new int[] { 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0 };
public static byte[] decompress(byte[] inData) {
const int sig = 0x5A4C4351; // "QCLZ"
int mode = BitConverter.ToInt32(inData, 4);
int compressedLength = BitConverter.ToInt32(inData, 8);
int decompressedLength = BitConverter.ToInt32(inData, 12);
bool isCompressed = BitConverter.ToInt32(inData, 16) == 1;
bool isDataCompressed = BitConverter.ToInt32(inData, 16) == 1;
int headerLength = 32;
if (BitConverter.ToInt32(inData, 0) != sig || BitConverter.ToInt32(inData, compressedLength - 4) != sig)
throw new ApplicationException("No QCLZ sig");
byte[] outData = new byte[decompressedLength];
if (!isCompressed) {
if (!isDataCompressed) {
copy(inData, headerLength, outData, 0, decompressedLength);
return outData;
}