Shared object obfuscation concept proven.

linux/shared_object_obfuscation/Makefile

@@ -0,0 +1,30 @@
+
+all: libshared_object.so executable.exe
+
+clean:
+	rm *.o *.so *.exe
+
+libshared_object.so : shared_object.o
+	g++ -fPIC --shared -O2 $< -o $@
+	strip $@
+
+shared_object.o : shared_object.cpp interface.h
+	g++ -fPIC -O2 $< -c -o $@
+	objcopy --redefine-sym _ZN17MyVerySecretClass14secret_method1Ev=m1 \
+			--redefine-sym _ZN17MyVerySecretClass14secret_method2Ev=m2 \
+			--redefine-sym _ZN17MyVerySecretClass14secret_method3Ev=m3 $@
+	
+
+executable.exe : executable.o libshared_object.so
+	g++ -O2 -lshared_object -L. $< -o $@
+	strip $@
+	
+executable.o : executable.cpp interface.h
+	g++ -O2 -lshared_object -L. $< -c -o $@
+	objcopy --redefine-sym _ZN17MyVerySecretClass14secret_method1Ev=m1 \
+			--redefine-sym _ZN17MyVerySecretClass14secret_method2Ev=m2 \
+			--redefine-sym _ZN17MyVerySecretClass14secret_method3Ev=m3 $@
+
+run: all
+	LD_LIBRARY_PATH=. ./executable.exe
+

linux/shared_object_obfuscation/executable.cpp

@@ -0,0 +1,36 @@
+/*
+VIM: let g:lcppflags="-O2 -lshared_object -L."
+VIM: let g:argv=""
+*/
+#include <iostream>
+#include <exception>
+#include "interface.h"
+
+int main ( void )
+{try{
+
+	MyVerySecretClass o;
+
+	o.secret_method1();
+	o.secret_method2();
+	o.secret_method1();
+	o.secret_method2();
+	o.secret_method1();
+	o.secret_method2();
+	o.secret_method3();
+
+	return 0;
+}
+catch ( const std::exception& e )
+{
+	std::cerr << std::endl
+			<< "std::exception(\"" << e.what() << "\")." << std::endl;
+	return 2;
+}
+catch ( ... )
+{
+	std::cerr  << std::endl
+			<< "unknown exception." << std::endl;
+	return 1;
+}}
+

linux/shared_object_obfuscation/interface.h

@@ -0,0 +1,20 @@
+#ifndef __INTERFACE_TO_MY_VERY_SECRET_CLASS__
+#define __INTERFACE_TO_MY_VERY_SECRET_CLASS__
+
+class MyVerySecretClass
+{
+private:
+
+	int secret_var;
+
+public:
+
+	MyVerySecretClass();
+	~MyVerySecretClass();
+
+	void secret_method1();
+	void secret_method2();
+	void secret_method3();
+};
+
+#endif

linux/shared_object_obfuscation/shared_object.cpp

@@ -0,0 +1,40 @@
+/*
+VIM: let g:lcppflags="-O2 -pthread"
+VIM: let g:argv=""
+*/
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <iostream>
+#include <exception>
+
+#include "interface.h"
+
+MyVerySecretClass::MyVerySecretClass()
+	: secret_var(0)
+{
+}
+
+MyVerySecretClass::~MyVerySecretClass()
+{
+	secret_var = -1;
+}
+
+void MyVerySecretClass::secret_method1()
+{
+	++secret_var;
+}
+
+void MyVerySecretClass::secret_method2()
+{
+	std::cout << "The value of secret variable is " << secret_var << std::endl;
+}
+
+void MyVerySecretClass::secret_method3()
+{
+	char cmdln[128];
+	sprintf( cmdln, "pstack %d", getpid() );
+	system( cmdln );
+}
+