CN107992723A - A kind of Java protection of source codes methods based on dynamic link library - Google Patents
A kind of Java protection of source codes methods based on dynamic link library Download PDFInfo
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- CN107992723A CN107992723A CN201711225600.8A CN201711225600A CN107992723A CN 107992723 A CN107992723 A CN 107992723A CN 201711225600 A CN201711225600 A CN 201711225600A CN 107992723 A CN107992723 A CN 107992723A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000006870 function Effects 0.000 claims description 15
- 238000012856 packing Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 5
- 238000000605 extraction Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 238000012423 maintenance Methods 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/12—Protecting executable software
- G06F21/14—Protecting executable software against software analysis or reverse engineering, e.g. by obfuscation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
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Abstract
The present invention discloses the present invention and provides a kind of Java protection of source codes methods based on dynamic link library, and extraction and separate function interface statement and function realization body are carried out from Java source code file, obtains the interface statement file extracted in source code；Java bytecode file is compiled source code into, byte code files are handled, bytecode content information is obtained and generates dynamic link library file；The interface statement file of the extraction is compiled, obtains and calls file for the interface of issue, and can issue and be used for third party；The dynamic link library file is deployed in the environment of operation, bytecode information in the dynamic link library file content is dynamically loaded into JVM virtual machines using corresponding java class loader, completes the operation to protected code.This method effectively can protect core code and be run control, add the protection to Java source code.
Description
Technical field
The present invention relates to the field of information security technology in network system.
Background technology
In current software system development, the mould of B/S (Browser/Server) structure, that is, browser and server structure
Formula becomes more and more popular.It is with the rise of Internet technologies, to a kind of change of C/S structures or improved structure.B/S
The advantages of structure：There is distributivity, it is simply square business processing, the operation expanding such as can be inquired about, browsed whenever and wherever possible
Just, server capability can be increased by increasing webpage, safeguarded simple and convenient, it is only necessary to change webpage, you can realize that institute is useful
The synchronized update at family, exploitation is simple, and sharing is strong.Most of B/S systems are based on the J2EE Technical Architectures of mainstream.
Java source code compilation run file common format for J2EE technological development is the lattice such as Jar bags or War bags
Formula.A kind of currently existing scheme is that project source code use is broken into War bags, and is decompressed into the form of file；By specified folder
Under sound code file encryption, reduce source Class files by the risk of direct decompiling；Classloader is rewritten, passes through self-defined JVM
Classloader, decrypts sound code file；Obscure Classloader, by obscuring self defined class loader, reach and upset Classloader and patrol
Collect, hide the purpose of decipherment algorithm.Or logic replacement is carried out to program source code, source code function calling relationship is preserved, and
Replaced with designated character string and separator, generation authority is encrypted to the correspondence of the recalls information of function, rewritten
Java class loader is sent to user terminal, makes the Java code of authority and function calling logic described in user's terminal deciphering
Generate source code file.Function call information is obtained from source code file, or core source code is replaced with preset characters string,
And content-encrypt will be replaced.Classloader is rewritten at the same time, when operation, by code by authority to substitute character string
It is decrypted, so as to reduce Java operation source codes.In practical applications, the source code by using Code obfuscation, although reducing
The readability of code, but the operation code after compiling still can be by decompiling.If by changing source code, by core
Source code content is substituted for call function or character string information, then can influence the maintenance of source code.
Therefore, it is necessary to a kind of new technical solution is to solve the above problems.
The content of the invention
Goal of the invention：A kind of Java protection of source codes method is provided, to meet to prevent Java operating files by the need of decompiling
Ask.
Technical solution：To reach above-mentioned purpose, the present invention can adopt the following technical scheme that：
A kind of Java protection of source codes methods based on dynamic link library, it is characterised in that comprise the following steps：
(1), Java interfaces are extracted：Source code file extract and realizes master with separate function interface statement and function
Body；By the Java source code of protection in need extract a socket, the only sound comprising Java interfaces and class in interface document
It is bright, obtain the interface statement file of source code extraction；
(2), compiling file：All compilation of source code are packaged into Class byte code files, and parse byte digital content,
Relation of interdependence in bytecode is recorded, and C language header file is generated according to byte digital content；
(3), dynamic link library file is generated：By C language header file and encrypting module, packing is compiled into dynamic link library text
Part, generates dll or so formatted files；
(4), packing and issuing is compiled to Java interface documents：The interface document extracted in step (1) is compiled packing,
The Jar interface documents used for third party developer are formed, and are distributed；
(5), loading local lib bags are set：The dll or so that include all Java bytecode contents that step (3) is generated
File is deployed in running environment, and sets JVM-agentlib start-up parameters；
(6), dynamic load dynamic link library content：In program operation process, by Classloader dynamically by dynamic chain
Connect in storehouse and be housed in encrypted Java bytecode in JVM, realize the load operating of complete Java bytecode.
Beneficial effect：
The present invention will realize a kind of Java source code guard method based on dynamic link library and device, mainly for Java
Code is difficult to protect, easily by decompiling, can not effectively protect core code, can not prevent what program was copied illegally and propagated
Problem, it is proposed that a kind of Java protection of source codes method and devices based on dynamic link library, Java source code can be compiled pack
Into dynamic link library file, by issuing Java interface documents, dynamic load dynamic link library file, so as to reach protection Java
Source code avoids being sent out compiling.Java obfuscated codes can be avoided by decompiling, while avoid replacement Java source code content from causing
Code maintenance it is difficult.
Further, in step (2), institute's source code is packaged into Class bytes by the compiling of the instruments such as Ant, Maven
Code file.
Further, JVM-agentlib start-up parameter methods to set up are in step (5)：agentlib:Libname [=
Options], setting libname is local agent library file name；It is entitled to search for local library by JVM on windows platform
The file of libname.dll, JVM searches for the file of the entitled libname.so of local library on linux platforms.
Further, JVM is Java Virtual Machine.
Further, this method is applied to B/S structures.
Brief description of the drawings
Fig. 1 is the schematic diagram of Java protection of source codes methods in the present invention.
Embodiment
The technical term that the present invention includes is described as follows:
Dynamic link library：Dynamic link library can support Window and linux system, be dll files under Window platforms,
So files under Linux platform, device are mainly a kind of mode for realizing Sharing Function storehouse concept.Dynamic link provides one kind side
Method, allows process to call the function for being not belonging to its executable code.The executable code of function is located at a dynamic link library
In file, which has been compiled, has linked comprising one or more and the letter with being stored separately using their process
Number.Dynamic link library additionally aids shared data and resource.
Java Virtual Machine：Virtual machine is a kind of computer of abstract, by actual computer analogue simulation it is each
Computer function is planted to realize.A kind of Java Virtual Machine (JVM) specification for computer equipment, can use different modes
(software or hardware) is realized.The instruction set of virtual machine compiler and the instruction set for compiling microprocessor are very similar.Java is empty
Plan machine has oneself perfect hardware framework, such as processor, storehouse, register, also with corresponding instruction system.Java is virtual
It is empty that machine includes a set of byte code instruction collection, one group of register, a stack, a garbage reclamation heap and a storage method domain Java
Plan machine shields and the relevant information of specific operating system platform so that java applet need to only be generated and run on a java virtual machine
Object code (bytecode), it is possible to run without modification in kinds of platform.
Bytecode：Bytecode (Byte-code) be it is a kind of comprising executive program, by a sequence op code/datas to forming
Binary file.Bytecode is a kind of intermediate code, it is more abstract than machine code.It is often counted as comprising an execution journey
The binary file of sequence, more like an object model.Bytecode by so cried be because usually each opcode be a byte long,
But the length of instruction code is change.Each instruction has (or hexadecimal from 0 to 255：00 arrives FF) a byte manipulation
Code, is followed by parameter such as register or memory address.
Java class loader：Classloader be responsible for will likely be on network, be also likely to be that class files on disk add
It is downloaded in memory.And generate corresponding java.lang.class objects for it.Once a class is loaded into JVM, same class
It would not be loaded again.A class is by the use of its full class name (bag name and class name) that limits as its unique mark in JAVA, still
In JVM, a class limits class name entirely by the use of it and its Classloader is used as its unique mark.Same class in JAVA, such as
Fruit is loaded with different Classloaders, then the class objects generated are considered different.When JVM starts, can be formed by three
The initial Classloader hierarchical structure of Classloader composition.
The present invention provides a kind of Java protection of source codes methods based on dynamic link library, the B/S applied to computer realm
Structure.
The present invention comprises the following steps：
(1), Java interfaces are extracted：Source code file extract and realizes master with separate function interface statement and function
Body.Using device by the Java source code of protection in need extract a socket, only include Java interfaces in interface document
With the statement of class.Obtain the interface statement file of source code extraction.
(2), compiling file：Institute's source code is packaged into Class bytecodes text by the compiling of the instruments such as Ant, Maven
Part, and byte digital content is parsed, relation of interdependence in bytecode is recorded, and C language header file is generated according to byte digital content.
(3), dynamic link library file is generated：By C language header file and encrypting module, packing is compiled into dynamic link library text
Part, generates dll or so formatted files, file content can be avoided to be revealed by decompiling.
(4), packing and issuing is compiled to Java interface documents：The interface document that will be extracted in step a), is compiled packing,
The Jar interface documents used for third party developer are formed, and are distributed.
(5), loading local lib bags are set：By the texts of the dll or so comprising all Java bytecode contents of c) step generation
Part is deployed in running environment, and sets JVM-agentlib start-up parameters, such as-agentlib:Libname [=options],
Setting libname is local agent library file name.JVM searches for the text of the entitled libname.dll of local library on windows platform
Part, JVM searches for the file of the entitled libname.so of local library on linux.
(6), dynamic load dynamic link library content：In program operation process, by Classloader dynamically by dynamic chain
Connect in storehouse and be housed in encrypted Java bytecode in JVM, realize the load operating of complete Java bytecode.
Be difficult to protect present invention is generally directed to Java code, easily by decompiling, can not effectively protect core code, can not
The problem of preventing program to be copied illegally and propagate, it is proposed that a kind of Java protection of source codes method and dress based on dynamic link library
Put, Java source code can be compiled and be packaged into dynamic link library file, by issuing Java interface documents, dynamic load dynamic chain
Library file is connect, avoids being sent out compiling so as to reach protection Java source code.
In addition, the concrete methods of realizing and approach of the present invention are very much, the above is only the preferred embodiment of the present invention.
It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, it can also do
Go out some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.What is be not known in the present embodiment is each
The available prior art of part is realized.
Claims (5)
- A kind of 1. Java protection of source codes methods based on dynamic link library, it is characterised in that comprise the following steps：(1), Java interfaces are extracted：Source code file extract and separate function interface statement and function realization body；Will The Java source code of protection in need extract a socket, the only statement comprising Java interfaces and class, obtains in interface document The interface extracted to source code states file；(2), compiling file：All compilation of source code are packaged into Class byte code files, and parse byte digital content, are recorded Relation of interdependence in bytecode, and C language header file is generated according to byte digital content；(3), dynamic link library file is generated：By C language header file and encrypting module, packing is compiled into dynamic link library file, Generate dll or so formatted files；(4), packing and issuing is compiled to Java interface documents：The interface document extracted in step (1) is compiled packing, is formed The Jar interface documents used for third party developer, and be distributed；(5), loading local lib bags are set：Dll the or so files for including all Java bytecode contents that step (3) is generated It is deployed in running environment, and JVM-agentlib start-up parameters is set；(6), dynamic load dynamic link library content：In program operation process, by Classloader dynamically by dynamic link library In be housed in JVM in encrypted Java bytecode, realize the load operating of complete Java bytecode.
- 2. Java protection of source codes method according to claim 1, it is characterised in that：In step (2), institute's source code is led to Cross the compiling of the instruments such as Ant, Maven and be packaged into Class byte code files.
- 3. Java protection of source codes method according to claim 1, it is characterised in that：JVM-agentlib is opened in step (5) Dynamic parameter setting method is：agentlib:Libname [=options], setting libname are local agent library file name； JVM searches for the file of the entitled libname.dll of local library on windows platform, the local library name of JVM search on linux platforms For the file of libname.so.
- 4. the Java protection of source codes methods according to claim 1 or 2 or 3, it is characterised in that：JVM is Java Virtual Machine.
- 5. Java protection of source codes method according to claim 1, it is characterised in that：Applied to B/S structures.
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108985014A (en) * | 2018-06-13 | 2018-12-11 | 珠海金山网络游戏科技有限公司 | The method and device of the Python byte code files in game is protected in a kind of export |
| CN109409037A (en) * | 2018-09-29 | 2019-03-01 | 阿里巴巴集团控股有限公司 | A kind of generation method, device and the equipment of data obfuscation rule |
| CN109492354A (en) * | 2018-10-23 | 2019-03-19 | 海南新软软件有限公司 | A kind of method, apparatus and system of obfuscated codes |
| CN109766717A (en) * | 2018-12-26 | 2019-05-17 | 北京思源互联科技有限公司 | A kind of static resource guard method and its device based on dynamic link library |
| CN109766141A (en) * | 2018-12-26 | 2019-05-17 | 北京思源互联科技有限公司 | A kind of data dynamic updating method and its device based on dynamic link library |
| CN109784007A (en) * | 2018-12-04 | 2019-05-21 | 厦门中控智慧信息技术有限公司 | A kind of method of byte code encryption, the method and terminal of bytecode decryption |
| CN110032425A (en) * | 2019-03-22 | 2019-07-19 | 北京智游网安科技有限公司 | A kind of dynamic link library file virtual method, system and storage medium |
| CN110309630A (en) * | 2019-06-28 | 2019-10-08 | 南京冰鉴信息科技有限公司 | A kind of Java code encryption method and device |
| CN110619196A (en) * | 2019-09-19 | 2019-12-27 | 北京丁牛科技有限公司 | Project code protection method and device based on scripting language |
| CN110647751A (en) * | 2018-06-26 | 2020-01-03 | 马上消费金融股份有限公司 | Method, system, equipment and computer medium for determining security of jar packet |
| CN110795200A (en) * | 2018-08-01 | 2020-02-14 | 北京钛云物联科技有限公司 | Device suitable for Java running environment and implementation method thereof |
| CN110990019A (en) * | 2019-11-20 | 2020-04-10 | 腾讯音乐娱乐科技（深圳）有限公司 | Java class analysis method and device, storage medium and electronic equipment |
| CN111045682A (en) * | 2019-12-04 | 2020-04-21 | 北京小米移动软件有限公司 | Method, device and medium for realizing asynchronous processing of components |
| CN111460464A (en) * | 2019-01-22 | 2020-07-28 | 阿里巴巴集团控股有限公司 | Data encryption and decryption method and device, electronic equipment and computer storage medium |
| CN111580798A (en) * | 2020-03-30 | 2020-08-25 | 佛山职业技术学院 | Dynamic link library implementation method, system, computer equipment and storage medium |
| CN111736916A (en) * | 2020-06-08 | 2020-10-02 | 北京达佳互联信息技术有限公司 | Dynamic expansion method and device based on Java language, electronic equipment and storage medium |
| CN111782334A (en) * | 2019-04-04 | 2020-10-16 | 北京智游网安科技有限公司 | Dynamic link library file virtualization method, storage medium and terminal equipment |
| CN112163195A (en) * | 2020-10-14 | 2021-01-01 | 北京邮电大学 | Novel virtual machine software protection method based on stack hiding |
| CN112395564A (en) * | 2020-11-17 | 2021-02-23 | 平安普惠企业管理有限公司 | Protection and operation method, device, equipment and storage medium of class file |
| CN113238834A (en) * | 2021-05-31 | 2021-08-10 | 北京世冠金洋科技发展有限公司 | Processing method and device of simulation model file and electronic equipment |
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| CN108985014A (en) * | 2018-06-13 | 2018-12-11 | 珠海金山网络游戏科技有限公司 | The method and device of the Python byte code files in game is protected in a kind of export |
| CN110647751A (en) * | 2018-06-26 | 2020-01-03 | 马上消费金融股份有限公司 | Method, system, equipment and computer medium for determining security of jar packet |
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| CN109409037B (en) * | 2018-09-29 | 2022-04-29 | 创新先进技术有限公司 | Method, device and equipment for generating data confusion rule |
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| CN109784007B (en) * | 2018-12-04 | 2021-03-12 | 厦门熵基科技有限公司 | Byte code encryption method, byte code decryption method and terminal |
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| CN109766717A (en) * | 2018-12-26 | 2019-05-17 | 北京思源互联科技有限公司 | A kind of static resource guard method and its device based on dynamic link library |
| CN111460464B (en) * | 2019-01-22 | 2023-04-25 | 阿里巴巴集团控股有限公司 | Data encryption and decryption method and device, electronic equipment and computer storage medium |
| CN111460464A (en) * | 2019-01-22 | 2020-07-28 | 阿里巴巴集团控股有限公司 | Data encryption and decryption method and device, electronic equipment and computer storage medium |
| CN110032425A (en) * | 2019-03-22 | 2019-07-19 | 北京智游网安科技有限公司 | A kind of dynamic link library file virtual method, system and storage medium |
| CN111782334B (en) * | 2019-04-04 | 2024-02-23 | 北京智游网安科技有限公司 | Dynamic link library file virtualization method, storage medium and terminal equipment |
| CN111782334A (en) * | 2019-04-04 | 2020-10-16 | 北京智游网安科技有限公司 | Dynamic link library file virtualization method, storage medium and terminal equipment |
| CN110309630A (en) * | 2019-06-28 | 2019-10-08 | 南京冰鉴信息科技有限公司 | A kind of Java code encryption method and device |
| CN110619196A (en) * | 2019-09-19 | 2019-12-27 | 北京丁牛科技有限公司 | Project code protection method and device based on scripting language |
| CN110990019A (en) * | 2019-11-20 | 2020-04-10 | 腾讯音乐娱乐科技（深圳）有限公司 | Java class analysis method and device, storage medium and electronic equipment |
| CN110990019B (en) * | 2019-11-20 | 2023-05-02 | 腾讯音乐娱乐科技（深圳）有限公司 | Java class analysis method and device, storage medium and electronic equipment |
| CN111045682A (en) * | 2019-12-04 | 2020-04-21 | 北京小米移动软件有限公司 | Method, device and medium for realizing asynchronous processing of components |
| CN111580798B (en) * | 2020-03-30 | 2023-06-06 | 佛山职业技术学院 | Dynamic link library implementation method, system, computer equipment and storage medium |
| CN111580798A (en) * | 2020-03-30 | 2020-08-25 | 佛山职业技术学院 | Dynamic link library implementation method, system, computer equipment and storage medium |
| CN111736916A (en) * | 2020-06-08 | 2020-10-02 | 北京达佳互联信息技术有限公司 | Dynamic expansion method and device based on Java language, electronic equipment and storage medium |
| CN112163195B (en) * | 2020-10-14 | 2022-08-05 | 北京邮电大学 | Virtual machine software protection method based on stack hiding |
| CN112163195A (en) * | 2020-10-14 | 2021-01-01 | 北京邮电大学 | Novel virtual machine software protection method based on stack hiding |
| CN112395564A (en) * | 2020-11-17 | 2021-02-23 | 平安普惠企业管理有限公司 | Protection and operation method, device, equipment and storage medium of class file |
| CN113238834A (en) * | 2021-05-31 | 2021-08-10 | 北京世冠金洋科技发展有限公司 | Processing method and device of simulation model file and electronic equipment |
| CN113238834B (en) * | 2021-05-31 | 2023-08-08 | 北京世冠金洋科技发展有限公司 | Simulation model file processing method and device and electronic equipment |
| CN113535263A (en) * | 2021-07-07 | 2021-10-22 | 深圳市元征未来汽车技术有限公司 | Dynamic library calling method and device, computer equipment and storage medium |
| CN117828555A (en) * | 2024-03-05 | 2024-04-05 | 山东浪潮科学研究院有限公司 | Low-cost Java source code protection method and device |
| CN117828555B (en) * | 2024-03-05 | 2024-05-28 | 山东浪潮科学研究院有限公司 | Low-cost Java source code protection method and device |
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