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string encryption pass #18

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string encryption pass #18

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b603040
add simple string xor encryption pass
yag00 Mar 9, 2014
fe547b2
string encryption pass : handle more cases
yag00 Jul 16, 2014
dfb7f56
fix filename AbstractStringEncryptionPass.cpp
yag00 Jul 16, 2014
7197a91
fix cmake build
yag00 Jul 16, 2014
cadce14
remove unused clear string global variable
yag00 Jul 16, 2014
f37115f
string encryption pass : handle more cases
yag00 Nov 28, 2014
1ed8190
fix clang crash when using -O3 optimization with string encryption pass
yag00 Nov 29, 2014
bd0482c
string encryption : unique global variable name
yag00 Nov 30, 2014
2e66935
Merge remote-tracking branch 'upstream/llvm-3.4' into llvm-3.4
yag00 Nov 30, 2014
69d3dac
string encryption pass : handle more cases
yag00 Jan 13, 2015
7c5444f
string encryptiion clean up, skip const char** constant string, they …
yag00 Jan 14, 2015
982a50e
struct { char* x = "str"; } encryption is not supported
yag00 Jan 20, 2015
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13 changes: 13 additions & 0 deletions include/llvm/Transforms/Obfuscation/StringEncryption.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,13 @@
#ifndef __STRING_ENCRYPTION_H__
#define __STRING_ENCRYPTION_H__

// LLVM include
#include "llvm/Pass.h"

using namespace llvm;

namespace llvm {
Pass* createXorStringEncryption();
}

#endif
8 changes: 8 additions & 0 deletions lib/Transforms/IPO/PassManagerBuilder.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@
#include "llvm/Transforms/Obfuscation/Substitution.h"
#include "llvm/Transforms/Obfuscation/Flattening.h"
#include "llvm/Transforms/Obfuscation/BogusControlFlow.h"
#include "llvm/Transforms/Obfuscation/StringEncryption.h"
#include "llvm/PrngAESCtr.h"


Expand Down Expand Up @@ -73,6 +74,9 @@ BogusControlFlow("bcf",cl::init(false),cl::desc("Enable bogus control flow"));
static cl::opt<bool>
Substitution("sub",cl::init(false),cl::desc("Enable instruction substitutions"));

static cl::opt<bool>
StringEncryption("xse",cl::init(false),cl::desc("Enable string encryptions"));

static cl::opt<std::string>
AesSeed("aesSeed",cl::init(""),cl::desc("seed for the AES-CTR PRNG"));

Expand Down Expand Up @@ -188,9 +192,13 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
// Substitution
if(Substitution) MPM.add(createSubstitution());

if(StringEncryption) MPM.add(createXorStringEncryption());

return;
}

if(StringEncryption) MPM.add(createXorStringEncryption());

// Add LibraryInfo if we have some.
if (LibraryInfo) MPM.add(new TargetLibraryInfo(*LibraryInfo));

Expand Down
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