CN104200137A - Method for guaranteeing self-security of JAVA program - Google Patents
Method for guaranteeing self-security of JAVA program Download PDFInfo
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- CN104200137A CN104200137A CN201410447116.XA CN201410447116A CN104200137A CN 104200137 A CN104200137 A CN 104200137A CN 201410447116 A CN201410447116 A CN 201410447116A CN 104200137 A CN104200137 A CN 104200137A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012795 verification Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 19
- 230000000977 initiatory effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
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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]
- G06F21/106—Enforcing content protection by specific content processing
- G06F21/1066—Hiding content
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- 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
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45504—Abstract machines for programme code execution, e.g. Java virtual machine [JVM], interpreters, emulators
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Abstract
The invention provides a method for guaranteeing the self-security of a JAVA program. GM algorithms SM2 and SM3 are used for signing a CLASS file of the JAVA, then a GM algorithm SM4 is used for encrypting the CLASS file, and the CLASS file is effectively prevented from being decompiled and tampered maliciously. The method can effectively protect the JAVA program, and the self-security is high. According to the encrypted CLASS file, a JAVA source program corresponding to the CLASS file can not be decompiled by any decompiling tools. For the signed CLASS file, any illegal change to the signed CLASS file can be timely found and is prevented from operating, attacks made by maliciously modifying codes are prevented, and the security level of the JAVA program is greatly improved.
Description
Technical field
The invention belongs to password and field of information security technology, relate generally to a kind of protection JAVA program inherently safe method.
Background technology
What after JAVA compilation of source code, generate is a kind of very easily by the bytecode of decompiling, and code and source code after decompiling almost do not have difference.Therefore some important information are just likely illegally accessed, and distort even JAVA program and also become very simple.Therefore protect the security of JAVA program self just to become important and necessary.
It is below professional technique terminological interpretation involved in the present invention.
JAVA: being a kind of cross-platform object-oriented explanation type programming language, is in the java applet design language of release in May nineteen ninety-five and the general name of Java platform (being JavaSE, JavaEE, JavaME) by Sun MicroSystems company.
JAVA bytecode: compiling forms through JAVA compilation tool by JAVA source code, and it can only move in JAVA virtual machine.Different from the local object code after the compiling of the language such as C/C++ and assembly language, in Java bytecode, still retain many semantic informations, as method name, name variable, call relation etc.This bytecode is very easily by decompiling, and code and source code after decompiling almost do not have difference.
CLASS file: the file of depositing JAVA bytecode.
JVM:JAVA virtual machine, is specifically designed to the bytecode of explaining and moving JAVA.
JNI: refer to Java local interface (Java Native Interface).It is a part of JDK, is used to Java that local code interface is provided.The Java code that JNI makes to operate on JAVA virtual machine can call the application program and the storehouse that use other Languages to write.
JVMTI:Java virtual machine tool interface (JVM Tool Interface) is the local programming interface that Java virtual machine provides, and is JVMPI(Java Virtual Machine Profiler Interface) and JVMDI(Java Virtual Machine Debug Interface) renewal version.The JVMTI client of utilizing can monitor JVM state and control JVM implementation.User can be by the agentLib parameter of JVM to JVM registration JVMTI client.
Hashing algorithm: refer to a class one-way cipher algorithm, i.e. one of this class algorithm irreversible mapping from prescribed paper to ciphertext part.Only have ciphering process, there is no decrypting process, hash algorithm can be fixed the input of random length the output of length after conversion simultaneously.This characteristic of unidirectional of hash algorithm and output data length because of fixed feature makes it can generating messages or " fingerprint " of data block.Therefore have a wide range of applications in fields such as data cryptogram agreement, digital signature, integrated authentications.
SM2: the one of asymmetric cryptographic algorithm is to be worked out by Password Management office of country of China, and the commercial algorithm of issuing in Dec, 2010.It is more safer than RSA Algorithm, arithmetic speed is also faster, in China's commercial cipher system, is used to replace RSA Algorithm.
SM3: the one of hashing algorithm is to be worked out by Password Management office of country of China, and in the commercial algorithm of issuing in Dec, 2010.For digital signature and checking, the generation of message authentication code and the generation of checking and random number of cipher application, can meet the demand for security of multiple cipher application.
SM4: the one of symmetric block cipher algorithm, worked out by Password Management office of country of China, and the commercial algorithm of issuing in March, 2012.The block length of this algorithm is 128 bits, and key length is 128 bits.Cryptographic algorithm and key schedule all adopt 32 to take turns nonlinear iteration structure.Decipherment algorithm is identical with the structure of cryptographic algorithm, the just use reversed in order of round key, and decryption round key is the contrary suitable of encryption round key.
Summary of the invention
For addressing the above problem, the invention provides a kind of protection JAVA program inherently safe method and comprise following steps:
Step 1: JAVA source program is compiled as to structuring CLASS file;
Step 2: structuring CLASS file is signed and encrypted.The structuring CLASS file of JAVA standard is converted to ciphertext CLASS file;
Step 3: ciphertext CLASS file is decrypted and obtains structuring CLASS file;
Step 4: structuring CLASS file is carried out to signature verification, and while signing by checking, JAVA bytecode is sent in JVM and moves.
Further, described step 1 is specially: with SM2 algorithm and SM3 algorithm, the byte code files of JAVA program is signed, signature value and CLASS file are according to fixed format merged in a file, obtain structuring CLASS file.
Further, described step 2 adopts SM4 algorithm to be encrypted CLASS file.
Further, described step 3 adopts SM4 algorithm to be decrypted and to obtain structuring CLASS file ciphertext CLASS.
Further, described step 4 is specially: from structuring CLASS file, take out signature value and JAVA bytecode carries out signature verification, while only having signature by checking, JAVA bytecode just can be sent in JVM and move.
Further, in step 4, be not inhibited in the operation alarm log information that also logging program has been tampered in JVM by the structuring CLASS file of signature verification.
Further, in step 4, in JVM, the step of operating structure CLASS file is specially:
Step a: start JVM;
Step b: monitor CLASS file load events to JVM registration;
Step c: be a call back function of CLASS file load events registration;
Steps d: the CLASS file to ciphertext in call back function is decrypted and signature verification.
Further, in step 4, adopting the client of JVMTI to bring in realization automatically real-time in the time that JVM loads CLASS file is the bytecode of JAVA standard by ciphertext CLASS file decryption; Described JVMTI client is compiled into a dynamic link library, and imports JVM in the time starting JVM; While adopting JVM to start, the Agent_OnLoad function that calls JVMTI client is carried out to initialization to JVMIT client.
Further, in step 4, in Agent_OnLoad function, can utilize SetEventNotificationMode to monitor CLASS file load events to JVM registration, utilize SetEventCallbacks function to articulate a call back function for CLASS file load events, in the time that JVM loads CLASS file, this call back function will be called.
Further, in step 4, in call back function, ciphertext CLASS file is decrypted and signature verification process, first with SM4 algorithm, ciphertext CLASS is decrypted, obtain structuring CLASS file, then from structuring CLASS file, take out signature value and JAVA bytecode carries out signature verification.
The present invention has following beneficial effect:
1.CLASS file is used the close SM4 algorithm for encryption of state, can effectively prevent that JAVA program is by decompiling, guarantees that important information is not illegally accessed.
2. adopt the close SM2 algorithm of state and SM3 algorithm signature, can prevent from utilizing the merit of malicious modification code initiation to hit.
3. keep the cross-platform characteristic of JAVA, the JNI using in the present invention and JVMTI are the standard techniques that JVM provides, with platform independence, JVMTI client and JNI call back function can be realized on the platform of JVM supporting, in this way can keep the cross-platform characteristic of JAVA.
4. adopt the close algorithm of state sign and encrypt, security is higher.
Brief description of the drawings
Fig. 1 is the method for the invention process flow diagram.
Fig. 2 is the structural representation of structuring CLASS file.
Embodiment
The present invention proposes a kind of state close algorithm protection JAVA program inherently safe method that adopts.
The design concept of the method is: first with the close algorithm SM2 of state and SM3, the CLASS file of JAVA is signed, then CLASS file is encrypted with the close algorithm SM4 of state, effectively prevent that CLASS file from being distorted by decompiling and malice.
As shown in Figure 1, the present invention includes following steps:
Step 1: adopt SM2 and SM3 algorithm to sign to the CLASS file of JAVA program, signature value and CLASS file are according to fixed format merged in a file, obtain structuring CLASS file.
As shown in Figure 2, the structure of structuring CLASS file is: be followed successively by signature value length (8 byte), JAVA bytecode signature value, JAVA bytecode.Described signature value is obtained by SM2 and SM3 algorithm.
Step 2: thus the ciphertext CLASS file that finally can externally issue obtained with SM4 algorithm for encryption structuring CLASS file.
Step 3: ciphertext CLASS file is decrypted and signature verification, is converted into the structuring CLASS file of the standard that JVM can identify;
The ciphertext CLASS file obtaining in step 2 can not directly be loaded and move by JVM, therefore need to before program operation, be decrypted and signature verification this ciphertext CLASS file, is converted into the normal structure CLASS file that JVM can identify.
Step 4: take out signature value and JAVA bytecode carries out signature verification from structuring CLASS file, while only having signature by checking, JAVA bytecode just can be sent in JVM and move.For not by signature verification, will be prohibited the alarm log information that operation logging program be tampered.
Automatically ciphertext CLASS file is decrypted and signature verification in order to realize before program operation, the present invention has adopted the JVMTI technology of JAVA standard and JNI technology to realize.
By known to the analysis of JNI and JVMTI, the DLL (dynamic link library) of utilizing JVMTI framework to provide, can capture JVM and load the event of CLASS file, and can be call back function of this event registration.In other words, namely can, in the time that JVM loads CLASS file, carry out self-defining function by this mechanism, complete self-defining operation.So the present invention adopts JVMTI technology to write a JVMTI client and brings in realization automatic real-time bytecode that is JAVA standard by ciphertext CLASS deciphering in the time of JAVA virtual load CLASS.This JVMTI client need to be compiled into a dynamic link library, and imports JVM into by agentlib parameter in the time starting JVM.
JVM carries out initialization by the Agent_OnLoad function that calls client to JVMIT client while startup.In Agent_OnLoad function, can utilize SetEventNotificationMode to monitor CLASS file load events to JVM registration, utilize SetEventCallbacks function to articulate a call back function that adopts JNI technology to write for CLASS file load events.In the time that JVM loads CLASS file, this call back function will be called like this.
In call back function, encrypt file CLASS file is decrypted and signature verification process, first with SM4 algorithm, ciphertext CLASS is decrypted, obtain structuring CLASS file.From structuring CLASS file, take out signature value again and JAVA bytecode carries out signature verification, when signature is during by checking, JAVA bytecode is loaded in JVM and is moved.If signature, by checking, will be prohibited to load and operation, and the alarm log information that has been tampered of logging program.Because JVMTI client and JNI call back function are all local codes, and deciphering is what in the internal memory of JVM, to complete, can in local file system, not retain the bytecode after deciphering, and the security of decrypting process is higher.
The present invention has following beneficial effect:
1.CLASS file is used the close SM4 algorithm for encryption of state, can effectively prevent that JAVA program is by decompiling, guarantees that important information is not illegally accessed.
2. adopt the close SM2 algorithm of state and SM3 algorithm signature, can prevent from utilizing the merit of malicious modification code initiation to hit.
3. keep the cross-platform characteristic of JAVA, the JNI using in the present invention and JVMTI are the standard techniques that JVM provides, with platform independence, JVMTI client and JNI call back function can be realized on the platform of JVM supporting, in this way can keep the cross-platform characteristic of JAVA.
4. adopt the close algorithm of state sign and encrypt, security is higher.
In sum, the JAVA program of protecting according to method of the present invention, himself security is higher.Through the CLASS file of encrypting, any decompiling instrument all can not decompiling goes out the JAVA source program of its correspondence; Through the CLASS file of signature, it is carried out to a bit illegal change and all will immediately be found and forbid operation, prevent from utilizing the merit of malicious modification code initiation to hit.The level of security of JAVA program self is greatly improved.
Claims (10)
1.
a kind of protection JAVA program inherently safe method, is characterized in that, comprises following steps:
Step 1: JAVA source program is compiled as to structuring CLASS file;
Step 2: structuring CLASS file is signed and encrypted.The structuring CLASS file of JAVA standard is converted to ciphertext CLASS file;
Step 3: ciphertext CLASS file is decrypted and obtains structuring CLASS file;
Step 4: structuring CLASS file is carried out to signature verification, and while signing by checking, JAVA bytecode is sent in JVM and moves.
2. protection JAVA program inherently safe method as claimed in claim 1; it is characterized in that; described step 1 is specially: the byte code files of JAVA program is signed with SM2 algorithm and SM3 algorithm; signature value and CLASS file are according to fixed format merged in a file, obtain structuring CLASS file.
3. protection JAVA program inherently safe method as claimed in claim 1, is characterized in that, described step 2 adopts SM4 algorithm to be encrypted CLASS file.
4. protection JAVA program inherently safe method as claimed in claim 1, is characterized in that, described step 3 adopts SM4 algorithm to be decrypted and to obtain structuring CLASS file ciphertext CLASS.
5. protection JAVA program inherently safe method as claimed in claim 1; it is characterized in that; described step 4 is specially: from structuring CLASS file, take out signature value and JAVA bytecode carries out signature verification, while only having signature by checking, JAVA bytecode just can be sent in JVM and move.
6. protection JAVA program inherently safe method as claimed in claim 5, is characterized in that, in step 4, is not inhibited in the operation alarm log information that also logging program has been tampered in JVM by the structuring CLASS file of signature verification.
7. protection JAVA program inherently safe method as claimed in claim 5, is characterized in that, in step 4, in JVM, the step of operating structure CLASS file is specially:
Step a: start JVM;
Step b: monitor CLASS file load events to JVM registration;
Step c: be a call back function of CLASS file load events registration;
Steps d: the CLASS file to ciphertext in call back function is decrypted and signature verification.
8. protection JAVA program inherently safe method as claimed in claim 7, is characterized in that, in step 4, adopting the client of JVMTI to bring in realization automatically real-time in the time that JVM loads CLASS file is the bytecode of JAVA standard by ciphertext CLASS file decryption; Described JVMTI client is compiled into a dynamic link library, and imports JVM in the time starting JVM; While adopting JVM to start, the Agent_OnLoad function that calls JVMTI client is carried out to initialization to JVMIT client.
9. protection JAVA program inherently safe method as claimed in claim 8; it is characterized in that; in step 4; in Agent_OnLoad function, can utilize SetEventNotificationMode to monitor CLASS file load events to JVM registration; utilize SetEventCallbacks function to articulate a call back function for CLASS file load events; in the time that JVM loads CLASS file, this call back function will be called.
10. protection JAVA program inherently safe method as claimed in claim 1; it is characterized in that; in step 4; in call back function, ciphertext CLASS file is decrypted and signature verification process; first with SM4 algorithm, ciphertext CLASS is decrypted; obtain structuring CLASS file, then from structuring CLASS file, take out signature value and JAVA bytecode carries out signature verification.
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Cited By (6)
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| CN104504311A (en) * | 2015-01-19 | 2015-04-08 | 炫彩互动网络科技有限公司 | Safe SDK production and operation method |
| CN106650342A (en) * | 2016-11-29 | 2017-05-10 | 北京握奇智能科技有限公司 | Jar packet strengthening method and system |
| CN107038371A (en) * | 2015-07-29 | 2017-08-11 | 腾讯科技（深圳）有限公司 | A kind of processing method of executable file, device, device and system |
| CN109325343A (en) * | 2018-09-17 | 2019-02-12 | 北京深思数盾科技股份有限公司 | Java applet executes method and device |
| CN110210188A (en) * | 2019-06-04 | 2019-09-06 | 武汉神算云信息科技有限责任公司 | Code encryption method, apparatus, equipment and storage medium under Spring frame |
| CN111273916A (en) * | 2018-12-04 | 2020-06-12 | 北京京东金融科技控股有限公司 | Algorithmic heat deployment method, apparatus, computer system and medium |
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| CN104504311A (en) * | 2015-01-19 | 2015-04-08 | 炫彩互动网络科技有限公司 | Safe SDK production and operation method |
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Application publication date: 20141210 |