源程序加密解決方案
Java代碼 ?
Class?Hello{?? ?? ????Public?static ?void ?main(String[]?args){?? ????????System.out.println(“hello”);?? ????????HelloMethod.sayHello();?? }?? }?? Class?HelloMethod{?? ?? ????Public?static ?void ?sayHello(){?? ????????System.out.println(“hello?in?static ?HelloMethod”);?? ?? }?? }??
Class Hello{Public static void main(String[] args){System.out.println(“hello”);HelloMethod.sayHello();
}
}
Class HelloMethod{Public static void sayHello(){System.out.println(“hello in static HelloMethod”);}
}
Java代碼 ?
BufferedInputStream?bis?=?new ?BufferedInputStream(new ?FileInputSteam(“d:/workbench/ciphertool/bin/com/aatest/Hello.class ”));?? byte []?data?=?new ?byte [bis.avialable()];??bis.read(data);?? bis.close();?? for (int ?I?=?0 ;?I?<?data.length;?i++){??????data[i]?=(byte )(?data[i]?+?1 );?? }?? BufferedOutputStream?bos?=?new ?BufferedOutputStream(new ?FileOutputStream(“d:/workbench/ciphertool/bin/com/aatest/Hello.class ”));?? bos.write(data);?? bos.close();??
BufferedInputStream bis = new BufferedInputStream(new FileInputSteam(“d:/workbench/ciphertool/bin/com/aatest/Hello.class”));
byte[] data = new byte[bis.avialable()];
bis.read(data);
bis.close();
for(int I = 0; I < data.length; i++){data[i] =(byte)( data[i] + 1);
}
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(“d:/workbench/ciphertool/bin/com/aatest/Hello.class”));
bos.write(data);
bos.close();
Java代碼 ?
package ?com.cjnetwork.ciphertool.core;???? import ?java.io.BufferedInputStream;??import ?java.io.File;??import ?java.io.FileInputStream;??import ?java.lang.reflect.Method;??import ?java.util.ArrayList;??import ?java.util.HashMap;??import ?java.util.List;??import ?java.util.Map;??import ?java.util.jar.JarEntry;??import ?java.util.jar.JarFile;???? import ?com.cjnetwork.ciphertool.util.CipherUtil;???? public ?class ?CjClassloader?extends ?ClassLoader?{???? ????String?classpath;?? ?????? ????Map<String,?Class>?loadedClassPool?=?new ?HashMap<String,?Class>();?? ?? ????public ?CjClassloader(String?classpath)?{?? ????????this .classpath?=?classpath;?? ????}?? ?? ?????? ????@SuppressWarnings ("unchecked" )?? ????@Override ?? ????public ?synchronized ?Class<?>?loadClass(String?name,?boolean ?resolve)?throws ?ClassNotFoundException?{?? ????????Class?claz?=?null ;?? ????????if ?(loadedClassPool.containsKey(name))?{?? ????????????claz?=?this .loadedClassPool.get(name);?? ????????}?else ?{?? ?? ????????????try ?{?? ????????????????if ?(claz?==?null )?{?? ????????????????????claz?=?super .loadClass(name,?false );?? ????????????????????if ?(claz?!=?null )?{?? ????????????????????????System.out.println("系統加載成功：" ?+?name);?? ????????????????????}?? ????????????????}?? ????????????}?catch ?(ClassNotFoundException?e)?{?? ????????????????System.out.println("系統無法加載：" ?+?name);?? ????????????}?? ?????????????? ????????????try ?{?? ????????????????if ?(claz?==?null )?{?? ????????????????????claz?=?loadByCjClassLoader(name);?? ????????????????????if ?(claz?!=?null )?{?? ????????????????????????System.out.println("自定義加載成功：" ?+?name);?? ????????????????????}?? ????????????????}?? ????????????}?catch ?(Exception?e)?{?? ????????????????System.out.println("自定義無法加載：" ?+?name);?? ????????????}?? ?? ????????????if ?(claz?!=?null )?{?? ????????????????this .loadedClassPool.put(name,?claz);?? ????????????}?? ?? ????????}?? ????????if ?(resolve)?{?? ????????????resolveClass(claz);?? ????????}?? ????????return ?claz;?? ????}?? ?? ????? ? ? ? ? ? ? ?? ????@SuppressWarnings ("unchecked" )?? ????private ?Class?loadByCjClassLoader(String?name)?{?? ????????Class?claz?=?null ;?? ????????try ?{?? ????????????byte []?rawData?=?loadClassData(name);?? ????????????if ?(rawData?!=?null )?{?? ????????????????byte []?classData?=?decrypt(getReverseCypher(this .cjcipher.getKeycode()),?rawData);?? ????????????????classData?=?CipherUtil.filter(classData,?this .cjcipher);?? ?????????????????? ????????????????claz?=?defineClass(name,?classData,?0 ,?classData.length);?? ????????????}?? ????????}?catch ?(Exception?e)?{?? ????????????claz?=?null ;?? ????????}?? ????????return ?claz;?? ????}?? ?? }??
package com.cjnetwork.ciphertool.core;import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;import com.cjnetwork.ciphertool.util.CipherUtil;public class CjClassloader extends ClassLoader {String classpath;Map<String, Class> loadedClassPool = new HashMap<String, Class>();public CjClassloader(String classpath) {this.classpath = classpath;}@SuppressWarnings("unchecked")@Overridepublic synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {Class claz = null;if (loadedClassPool.containsKey(name)) {claz = this.loadedClassPool.get(name);} else {try {if (claz == null) {claz = super.loadClass(name, false);if (claz != null) {System.out.println("系統加載成功：" + name);}}} catch (ClassNotFoundException e) {System.out.println("系統無法加載：" + name);}try {if (claz == null) {claz = loadByCjClassLoader(name);if (claz != null) {System.out.println("自定義加載成功：" + name);}}} catch (Exception e) {System.out.println("自定義無法加載：" + name);}if (claz != null) {this.loadedClassPool.put(name, claz);}}if (resolve) {resolveClass(claz);}return claz;}/*** * 解密加載* * * @param name* @return*/@SuppressWarnings("unchecked")private Class loadByCjClassLoader(String name) {Class claz = null;try {byte[] rawData = loadClassData(name);if (rawData != null) {byte[] classData = decrypt(getReverseCypher(this.cjcipher.getKeycode()), rawData);classData = CipherUtil.filter(classData, this.cjcipher);claz = defineClass(name, classData, 0, classData.length);}} catch (Exception e) {claz = null;}return claz;}}
Java代碼 ?
BufferedInputStream?bis?=?new ?BufferedInputStream(new ?FileInputSteam(“d:/workbench/ciphertool/bin/com/aatest/Hello.class ”));?? byte []?data?=?new ?byte [bis.avialable()];??bis.read(data);?? bis.close();?? for (int ?I?=?0 ;?I?<?data.length;?i++){??????data[i]?=(byte )(?data[i]?-?1 );?? }?? Class?claz?=?defineClass(“Hello”,?data,?0 ,?data.length);??
BufferedInputStream bis = new BufferedInputStream(new FileInputSteam(“d:/workbench/ciphertool/bin/com/aatest/Hello.class”));
byte[] data = new byte[bis.avialable()];
bis.read(data);
bis.close();
for(int I = 0; I < data.length; i++){data[i] =(byte)( data[i] - 1);
}
Class claz = defineClass(“Hello”, data, 0, data.length);
Java代碼 ?
CjClassLoader.class ?——》?CjClassLoaderEncryptor0.class ?? CjClassLoaderEncryptor1.class ???——》?CjClassLoaderEncryptor1.class ?? CjClassLoaderEncryptor2.class ???——》?CjClassLoaderEncryptor2.class ?? CjClassLoaderEncryptor3.class ???——》?CjClassLoaderEncryptor3.class ?? 。。。。。。?? CjClassLoaderEncryptorN.class ???——》?CjClassLoaderEncryptorN.class ??
CjClassLoader.class ——》 CjClassLoaderEncryptor0.class
CjClassLoaderEncryptor1.class ——》 CjClassLoaderEncryptor1.class
CjClassLoaderEncryptor2.class ——》 CjClassLoaderEncryptor2.class
CjClassLoaderEncryptor3.class ——》 CjClassLoaderEncryptor3.class
。。。。。。
CjClassLoaderEncryptorN.class ——》 CjClassLoaderEncryptorN.class
Java代碼 ?
CjClassLoaderEncryptorN??(密鑰N，動態裝入，解密，方法調用)??CjClassLoaderEncryptor(N–1 )?? CjClassLoaderEncryptor(N-1 )?(密鑰N-1 ，動態裝入，解密，方法調用)?CjClassLoaderEncryptor(N–2 )?? CjClassLoaderEncryptor(N-2 )?(密鑰N-2 ，動態裝入，解密，方法調用)?CjClassLoaderEncryptor(N-3 )?? ......?? CjClassLoaderEncryptor1??(密鑰1 ，動態裝入，解密，方法調用)??CjClassLoaderEncryptor0?? CjClassLoaderEncryptor0??(密鑰0 ，動態裝入，解密，方法調用)??CjClassLoader??
CjClassLoaderEncryptorN (密鑰N，動態裝入，解密，方法調用) CjClassLoaderEncryptor(N–1)
CjClassLoaderEncryptor(N-1) (密鑰N-1，動態裝入，解密，方法調用) CjClassLoaderEncryptor(N–2)
CjClassLoaderEncryptor(N-2) (密鑰N-2，動態裝入，解密，方法調用) CjClassLoaderEncryptor(N-3)
......
CjClassLoaderEncryptor1 (密鑰1，動態裝入，解密，方法調用) CjClassLoaderEncryptor0
CjClassLoaderEncryptor0 (密鑰0，動態裝入，解密，方法調用) CjClassLoader
轉載于:https://blog.51cto.com/guoguoguo/705614
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