CN103377326A - Confusion encrypting method and device for dynamic webpage program codes - Google Patents
Confusion encrypting method and device for dynamic webpage program codes Download PDFInfo
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- CN103377326A CN103377326A CN 201210110160 CN201210110160A CN103377326A CN 103377326 A CN103377326 A CN 103377326A CN 201210110160 CN201210110160 CN 201210110160 CN 201210110160 A CN201210110160 A CN 201210110160A CN 103377326 A CN103377326 A CN 103377326A
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Abstract
The invention discloses a confusion encrypting method and device for dynamic webpage program codes, and aims to solve the technical problem that confused and encrypted results are easy to be cracked by an existing confusion encrypting tool. The confusion encrypting method and device adopt a multiple-layer confusion encrypting process to increase difficulty in cracking and reducing a program, confusion encrypting aiming to function names and variable names are irreversible, and most powerful protect is provided for source codes. The confusion encrypting method and device solve the problem that confused and encrypted results of dynamic webpage program codes are easy to be cracked by the existing confusion encrypting tool, and provides better security for the dynamic webpage codes.
Description
Technical field
The present invention relates to Internet technical field, relate in particular to a kind of directly be embedded in dynamic web page program code in the webpage obscure encryption method and device.
Background technology
Directly write on code in the webpage for some, the dynamic web page programming technique of dynamic page effect is provided for webpage, such as JavaScript etc., when making up webpage, program code is not done special processing, in a single day product releases like this, and the user can directly intactly read the program source code of realizing by this type of technology from the webpage source file, and this has brought some hidden danger to code security.
Therefore need one this type of Embedded dynamic web page program code is carried out JavaScript to encrypt the instrument increase of obscuring and crack difficulty with reading code, reach the purpose of protecting code safety.
In order to increase the security such as the dynamic web page program code of JavaScrip type, in the prior art, usually can use some to obscure encryption function, for example the escape function is processed, and increases the difficulty that unauthorized user obtains code.In addition, also have the instrument of obscuring of some other types, such as Proguard, YUI Compressor etc. can be realized obscuring variable name.
But existing to write on dynamic web page program code in the webpage obscure Encryption Tool to obscure Cipher Strength inadequate, be easy to be cracked by the user, as use program code after escape obscures encryption, only need to use the unescape function to go out source program with regard to reducible.Therefore, existingly obscure the demand that Encryption Tool can't satisfy the future web page code security.
Summary of the invention
In view of this, what fundamental purpose of the present invention was to provide a kind of dynamic web page program code obscures encryption method and device, is used for solving existingly obscuring Encryption Tool and obscuring the technical matters that the result after the encryption is cracked easily.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of dynamic web page program code obscure encryption method, the method comprises:
Identify variable, function and character string in the dynamic page program source code in the webpage to be released, variable name, function name and character string are obscured processing, wherein, obscuring for irreversible of variable name and function name obscured;
Code after will obscuring uses encryption function as a complete character string, and the code after obscuring is encrypted.
Further, the described method that variable name, function name are obscured processing is:
Variable name and function name are treated to the form that alphabetical x adds numeral, make by the above-mentioned variable name of obscuring processing similar to the expression-form of the character string of 16 systems with function name.
Further, the described method that variable name, function name are obscured processing is:
Variable name and function name are treated to the random combine of Roman character " o ", " l " and numerical character " 0 ", " 1 " four characters.
Further, the described mode of obscuring to character string is:
The character string that all character strings in the source code is converted to 16 systems is expressed mode.
Further, the encryption method of described encryption function is:
Character string to input is carried out the one by one displacement operation of character, and on the basis of displacement, the combining encryption dictionary is encrypted character simultaneously.
Further, on the described basis of obscuring and encrypting, further use reversible ambiguity function to described obscure and encrypt after the result obscure further.
The present invention also provides a kind of encryption device of obscuring of dynamic web page program code, and this device comprises:
First obscures module, for variable, function and the character string in the dynamic page program source code of identifying webpage to be released, variable name, function name and character string is obscured processing, wherein, obscuring for irreversible of variable name and function name is obscured;
Encrypting module is used for and will uses encryption function through the first code after obscuring module and obscuring as a complete character string, and the code after obscuring is encrypted.
Further, described first obscures module obscures when processing variable name, function name, and variable name and function name are treated to the form that alphabetical x adds numeral, makes the variable name of obscuring after the processing similar to the expression-form of the character string of 16 systems with function name.
Further, described first obscures module obscures when processing variable name, function name, variable name and function name is treated to the random combine of Roman character " o ", " l " and numerical character " 0 ", " 1 " four characters.
Further, described first obscures module when described character string is obscured, and the character string that all character strings in the source code is converted to 16 systems is expressed mode.
Further, described encrypting module carries out the one by one displacement operation of character to the character string of input, and on the basis of displacement, the combining encryption dictionary is encrypted character simultaneously.
Further, described device also comprises:
Second obscures module, is used for the basis of obscuring the confusion result of module output first, further use reversible ambiguity function to described obscure and encrypt after the result obscure further.
The present invention has increased cracking of program and the difficulty of reducing by adopting multilayer to obscure ciphering process, and it is irreversible encrypting for obscuring of function and variable among simultaneously the present invention, can give the strongest protection of source code.The present invention has well solved to have now and has obscured Encryption Tool to the technical matters that encrypted result is cracked easily of obscuring of dynamic web page program code, and the security of dynamic web page code is provided.
Description of drawings
Fig. 1 be dynamic web page program code provided by the invention obscure the encryption method process flow diagram;
Fig. 2 is the functional module structure synoptic diagram of obscuring encryption device of dynamic web page program code provided by the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 1 be dynamic web page program code provided by the invention obscure the encryption method process flow diagram, concrete steps are as follows:
Step 101, read and analyze the dynamic page program source code in the webpage to be released, identify variable, function and character string in the described source code, variable name, function name and character string are obscured processing, wherein, obscuring for irreversible of variable name and function name obscured;
In this step, can cut apart source code and extract according to key word, position by the key words such as regular expression, character keyword search contrast judgement variable (var), function (function) and operational character extracts variable name and function name.
Preferably, one of obscuring in the following way of described variable name and function name:
(1) in the situation that guarantees variable and the uniqueness of function name in its action scope, variable name and function name are treated to the form that alphabetical x adds numeral, make by the above-mentioned variable name of obscuring processing similarly to the expression-form of the character string of 16 systems with function name, the proximity by character reaches the purpose of obscuring;
For example, adopt the method for source code " function code_1 () { alert (" encryption "); " after obscuring confusion result be:
function?x67(){window[″\x61\x6c\x65\x72\x74″](″\u52a0\u5bc6″)；}
Wherein, the character string in the function uses 16 systems to express, to reach the purpose of obscuring.
(2) in the situation that guarantees variable and the uniqueness of function name in its action scope, variable name and function name are obscured random combine for Roman character " o ", " l " and numerical character " 0 ", " 1 " four characters, and the proximity by character reaches the purpose of obscuring.
For example, adopt the method for source code " function code_1 () { alert (" encryption "); " after obscuring confusion result be:
function?dy100O11O1011O100(){window[″\x61\x6c\x65\x72\x74″](″\u52a0\u5bc6″)；}
Wherein, the character string in the function uses 16 systems to express, to reach the purpose of obscuring.
Above-mentioned two kinds to obscure method be irreversiblely to obscure, and namely the user can't restore source code by inverse process.
Preferably, carry out above-mentioned obscure before or after, source code is carried out in the situation of Complied executing not affecting, remove carriage return character, newline and unnecessary space in the source program code; In the necessary situation, carriage return character, newline can be replaced with space character.By aforesaid operations, reach the purpose of the readability that reduces code.
Preferably, in conjunction with or do not obscure method in conjunction with above-mentioned, the present invention expresses mode with the character string that all character strings in the source code are converted to 16 systems, obscures to reach further, reduces the purpose of the readability of code.
Step 102, the code after will obscuring use encryption function as a complete character string, and the code after obscuring is encrypted;
The present invention carries out superencipher by encryption function to the result after obscuring, and before needs operation source code, uses corresponding decryption function to reduce.
Preferably, the encryption method of described encryption function can for: to the input character string carry out the one by one displacement operation of character.The dictionary of displacement is the core of encrypting, can be with reference to " happy spreads displacement " encryption logic, and " happy spreads displacement " difference is, and the present invention is on the basis of displacement, and the combining encryption dictionary is encrypted character simultaneously.For example, in encryption dictionary, the character f after the corresponding encryption of former character a, the character k after the corresponding encryption of former character b translates encryption logic by displacement encryption logic and character, increases the difficulty that cracks, the security that further improves code.
Preferably; the present invention is on the above-mentioned basis of obscuring and encrypting; use existing reversible ambiguity function; the escape function among the JavaScrip for example; to above-mentioned obscure and encrypt after the result further obscure; and can set and obscure number of times, crack difficulty and crack the time thereby further increase, to reach the purpose of protection source code.After using the escape function to obscure, before operation code, need to call contrary ambiguity function unescape and carry out solution and obscure according to obscuring number of times.
The high-level schematic functional block diagram of obscuring encryption device 200 of the dynamic web page program code that Fig. 2 provides for the embodiment of the invention, this device comprises:
First obscures module 201, this module is for variable, function and character string in the dynamic page program source code of identifying webpage to be released, variable name, function name and character string are obscured processing, wherein, obscuring for irreversible of variable name and function name obscured;
Encrypting module 202 is used for and will uses encryption function through the first code after obscuring module and obscuring as a complete character string, and the code after obscuring is encrypted.
Preferably, described first obscures module 201 pairs of variable names, function names obscures when processing, and variable name and function name are treated to the form that alphabetical x adds numeral, makes the variable name of obscuring after the processing similar to the expression-form of the character string of 16 systems with function name.
In another preferred embodiment of the present invention, described first obscures module 201 pairs of variable names, function names obscures when processing, and variable name and function name is treated to the random combine of Roman character " o ", " l " and numerical character " 0 ", " 1 " four characters.
Obscure mode in conjunction with above-mentioned, described first obscures 201 pairs of described character strings of module when obscuring, and the character string that all character strings in the source code is converted to 16 systems is expressed mode.
Preferably, the character string of 202 pairs of inputs of described encrypting module is carried out the one by one displacement operation of character, and on the basis of displacement, the combining encryption dictionary is encrypted character simultaneously.
Preferably, described device also comprises: second obscures module 203, is used for the basis of obscuring the confusion result of module 201 outputs first, further use reversible ambiguity function to described obscure and encrypt after the result obscure further.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (12)
- A dynamic web page program code obscure encryption method, it is characterized in that the method comprises:Identify variable, function and character string in the dynamic page program source code in the webpage to be released, variable name, function name and character string are obscured processing, wherein, obscuring for irreversible of variable name and function name obscured;Code after will obscuring uses encryption function as a complete character string, and the code after obscuring is encrypted.
- 2. method according to claim 1 is characterized in that, the described method that variable name, function name are obscured processing is:Variable name and function name are treated to the form that alphabetical x adds numeral, make by the above-mentioned variable name of obscuring processing similar to the expression-form of the character string of 16 systems with function name.
- 3. method according to claim 1 is characterized in that, the described method that variable name, function name are obscured processing is:Variable name and function name are treated to the random combine of Roman character " o ", " l " and numerical character " 0 ", " 1 " four characters.
- 4. according to claim 1,2 or 3 described methods, it is characterized in that the described mode of obscuring to character string is:The character string that all character strings in the source code is converted to 16 systems is expressed mode.
- 5. method according to claim 1 is characterized in that, the encryption method of described encryption function is:Character string to input is carried out the one by one displacement operation of character, and on the basis of displacement, the combining encryption dictionary is encrypted character simultaneously.
- 6. method according to claim 1 is characterized in that, on the described basis of obscuring and encrypting, further use reversible ambiguity function to described obscure and encrypt after the result obscure further.
- A dynamic web page program code obscure encryption device, it is characterized in that this device comprises:First obscures module, for variable, function and the character string in the dynamic page program source code of identifying webpage to be released, variable name, function name and character string is obscured processing, wherein, obscuring for irreversible of variable name and function name is obscured;Encrypting module is used for and will uses encryption function through the first code after obscuring module and obscuring as a complete character string, and the code after obscuring is encrypted.
- 8. device according to claim 7, it is characterized in that, described first obscures module obscures when processing variable name, function name, variable name and function name are treated to the form that alphabetical x adds numeral, make the variable name of obscuring after the processing similar to the expression-form of the character string of 16 systems with function name.
- 9. device according to claim 7, it is characterized in that, described first obscures module obscures when processing variable name, function name, variable name and function name is treated to the random combine of Roman character " o ", " l " and numerical character " 0 ", " 1 " four characters.
- 10. according to claim 7,8 or 9 described devices, it is characterized in that described first obscures module when described character string is obscured, the character string that all character strings in the source code is converted to 16 systems is expressed mode.
- 11. device according to claim 7 is characterized in that, described encrypting module carries out the one by one displacement operation of character to the character string of input, and on the basis of displacement, the combining encryption dictionary is encrypted character simultaneously.
- 12. device according to claim 7 is characterized in that, described device also comprises:Second obscures module, is used for the basis of obscuring the confusion result of module output first, further use reversible ambiguity function to described obscure and encrypt after the result obscure further.
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