CN110377337A - Information extracting method, intelligent terminal and storage medium in a kind of application - Google Patents
Information extracting method, intelligent terminal and storage medium in a kind of application Download PDFInfo
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- CN110377337A CN110377337A CN201910681900.XA CN201910681900A CN110377337A CN 110377337 A CN110377337 A CN 110377337A CN 201910681900 A CN201910681900 A CN 201910681900A CN 110377337 A CN110377337 A CN 110377337A
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000006837 decompression Effects 0.000 claims abstract description 21
- 238000000605 extraction Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004883 computer application Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/903—Querying
- G06F16/90335—Query processing
- G06F16/90344—Query processing by using string matching techniques
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/70—Software maintenance or management
- G06F8/74—Reverse engineering; Extracting design information from source code
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- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses information extracting method, intelligent terminal and storage mediums in a kind of application, which comprises decompresses APK file, it is .dex file that suffix is obtained in the APK file after decompression；.dex file header is read, the quantity and character string structure of character string are determined according to the .dex file header, offset of the character string in the .dex file is obtained according to the character string structure, character string is read according to the offset；The resource file for executing all character string lists for including in pre-set commands output APK, goes out application message according to character string information combination regular expression matching.The present invention realizes the key message in automatic and high efficiency extraction APK, does not have to that a large amount of file is written, so that result exports at a terrific speed.
Description
Technical field
The present invention relates to information extracting methods, intelligent terminal in computer application technology more particularly to a kind of application
And storage medium.
Background technique
It needs that the content in application file is obtained and analyzed in the prior art, judges whether in violation of rules and regulations, to obtain application
In information have following scheme:
It is installed on mobile phone by manual operation and runs APK (AndroidPackage, Android program installation kit), directly
Meeting observation APK, whether the information such as text on mobile phone interface have containing relating to the violations vocabulary such as Huang, violence in the process of running；Disadvantage
It is very time-consuming, and covering surface is not complete, is easy to miss and hides very deep information.
Analyzed by manual static, conversed analysis engineer by using profession reverse tool (APKtool, jadx,
AndroidKiller jeb etc.) carrying out decompiling to application, (computer software reverse engineering is also referred to as computer software reduction work
Journey refers to through the target program to other people softwares, such as executable program, carries out " conversed analysis, research " work, to derive
The design elements such as thinking, principle, structure, algorithm, treatment process, operation method used in other people software product out, it is certain
Source code may be derived under specific condition), for the file after decompiling, the information such as manual search matched text, IP, URL；
The disadvantage is that there is technical threshold, specialty analysis personnel is needed to participate in, and time-consuming.
It is automated and is extracted based on inverse compiling technique authoring tool, write program or automatized script, use order " java-
Jar APKtool.jar d xxx.APK " calls APKtool tool to carry out decompiling to APK file, and program scanning is counter later compiles
Code after translating matches the information such as all text informations occurred in code, IP, URL；The disadvantage is that traditional decompiling instrument,
A large amount of smali files, resource file are generated, match information then is scanned to a little files.Efficiency is relatively relatively low.
The shortcomings that prior art is time-consuming, low efficiency.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
The main purpose of the present invention is to provide information extracting method, intelligent terminal and storage medium in a kind of application, purports
Solving the problems, such as to obtain information time-consuming and low efficiency in application in the prior art.
To achieve the above object, the present invention provides information extracting method in a kind of application, information extraction side in the application
Method includes the following steps:
APK file is decompressed, it is .dex file that suffix is obtained in the APK file after decompression；
.dex file header is read, the quantity and character string structure of character string are determined according to the .dex file header, according to institute
It states character string structure and obtains offset of the character string in the .dex file, character string is read according to the offset；
The resource file for executing all character string lists for including in pre-set commands output APK, according to character string information knot
It closes regular expression matching and goes out application message.
Optionally, information extracting method in the application, wherein the decompression APK file, the APK text after decompression
It is .dex file that suffix is obtained in part, comprising:
APK file is obtained, the suffix name of the APK file is revised as zip；
The APK file for having modified suffix name is decompressed by decompression tool, and literary from the APK after decompression
It is .dex file that suffix is obtained in part.
Optionally, information extracting method in the application, wherein the reading .dex file header, according to the .dex
File header determines the quantity and character string structure of character string, obtains character string in the .dex file according to the character string structure
In offset, according to the offset read character string part, comprising:
.dex file header is read, according to the stringIdsSize and stringIdsOff in the .dex file header structure
The value of section determines the quantity and character string structure of character string；
Have in the character string structure and the value of only one field has recorded character string in the .dex file
Offset reads character string according to the offset.
Optionally, information extracting method in the application, wherein all packets in the execution pre-set commands output APK
The resource file of the character string list contained goes out application message according to character string information combination regular expression matching, comprising:
Order aapt dump strings is executed using Android strapping tool, exports all character tandems for including in APK
The resource file of table；
According to character string information, application message is obtained in conjunction with regular expression matching, and export and use to analysis personnel.
Optionally, information extracting method in the application, wherein the resource file does not include the character in code
String.
Optionally, information extracting method in the described application, wherein the application message include text, IP, URL and
Domain name.
Optionally, information extracting method in the application, wherein described to execute order aapt using Android strapping tool
Dump strings exports the resource file of all character string lists for including in APK specifically:
Using the Android strapping tool provided in Android sdk at the build-tools of sdk, order aapt is used
Dump strings " prints the resource file of all character string lists for including in APK.
Optionally, information extracting method in the application, wherein described to execute order aapt using Android strapping tool
Dump strings is exported in APK after the resource file of all character string lists for including further include:
Merge two character string lists, removes repetition and idle character string exports again.
In addition, to achieve the above object, the present invention also provides a kind of intelligent terminals, wherein the intelligent terminal includes: to deposit
Reservoir, processor and information extracting program, the institute in that is stored on the memory and can run on the processor
State the step of realizing information extracting method in application as described above when information extracting program in application is executed by the processor.
In addition, to achieve the above object, the present invention also provides a kind of storage mediums, wherein the storage medium is stored with
The information extracting program in is realized when information extracting program is executed by processor in the application and is believed in application as described above
The step of ceasing extracting method.
In the present invention, by decompressing APK file, it is .dex file that suffix is obtained in the APK file after decompression；It reads
.dex file header determines the quantity and character string structure of character string according to the .dex file header, according to the character string structure
Offset of the character string in the .dex file is obtained, character string is read according to the offset；Execute pre-set commands output
The resource file of all character string lists for including in APK goes out application letter according to character string information combination regular expression matching
Breath.The present invention realizes the key message in automatic and high efficiency extraction APK, does not have to that a large amount of file is written, so that result is with pole
Fast speed output.
Detailed description of the invention
Fig. 1 is the flow chart of the preferred embodiment of information extracting method in present invention application；
Fig. 2 is the running environment schematic diagram of the preferred embodiment of intelligent terminal of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Information extracting method in application described in present pre-ferred embodiments, as shown in Figure 1, information extraction in the application
Method the following steps are included:
Step S10, APK file is decompressed, it is .dex file that suffix is obtained in the APK file after decompression.
Specifically, APK file is obtained, the suffix name of the APK file is revised as zip；It will have been repaired by decompression tool
The APK file for changing suffix name is decompressed, and obtaining suffix from the APK file after decompression is .dex file.
Wherein, dex file is a kind of file type of bytecode, it is executed at the terminal, needs to turn by one layer of compiling
Changing machine code into can just be run；Dex file is divided into 3 areas, including header file, index area and data field, and header file includes text
Part head (header)；Index area includes the index of character string, the index of type, the index of method prototype, the index in domain and side
The index of method (other than the file information of description .dex file, there are also the indexes of other each regions in file)；Data field packet
Include the definition, data field and link data field of class.
Step S20 .dex file header is read, the quantity and character string knot of character string are determined according to the .dex file header
Structure obtains offset of the character string in the .dex file according to the character string structure, reads word according to the offset
Symbol string.
Specifically, read .dex file header, according in the .dex file header structure stringIdsSize and
StringIdsOff sections of value determines the quantity and character string structure of character string；Have in the character string structure and only one
The value of field has recorded offset of the character string in the .dex file, reads character string according to the offset.
I.e. read .dex file header, according in dex header structure stringIdsSize and stringIdsOff sections of value it is true
The quantity and character string structural deflection for determining character string, have in character string structure and the value of only one field has recorded character string
Offset in dex file finds character string according to this offset, reads out.
Step S30, the resource file for executing all character string lists for including in pre-set commands output APK, according to character
String information combination regular expression matching goes out application message.
Specifically, using Android strapping tool (aapt, i.e. Android Asset Packaging Tool, SDK's
Under build-tools catalogue, which can be checked, creation updates the document attachment of ZIP format, including zip, jar, apk,
Resource file can also be compiled into binary file) it executes and orders aapt dump strings, it is all in output APK to include
The resource file of character string list；According to character string information, application message is obtained in conjunction with regular expression matching, and output is given and divided
Analysis personnel use.
Wherein, regular expression is also known as regular expression (English: Regular Expression often writes a Chinese character in simplified form in code
For regex, regexp or RE), a concept of computer science, regular expression is usually used to retrieval, replaces those symbols
Close the text of some mode (rule)；Many programming languages are all supported to carry out string operation using regular expression.Example
Such as, a just built-in powerful regular expression engine in Perl, this concept of regular expression be initially by
Tool software (such as sed and grep) in Unix is universal to be opened, and regular expression is usually abbreviated as " regex ", and odd number has
Regexp, regex, plural number have regexps, regexes, regexen.
The character that all resource files include in APK can be exported by executing order " aapt dump strings " using aapt
Tandem table (not comprising the character string in code).
In conjunction with the character string information that above step obtains, in conjunction with regular expression (
IP:(2 (5 [0-5] { 1 } | [0-4] d { 1 }) | [0-1]? d { 1,2 }) ((2 (and 5 [0-5] { 1 } | [0-4] d
{ 1 }) | [0-1]? d { 1,2 })) { 3 }
；URL:(http | ftp | https): //[ w -_]+( [ w -_]+)+([ w-,@^
=%&；:/~+#] * [and w -@? ^=%&；/~+#])
) information such as IP, URL, domain name are matched, output is used to analysis personnel.
Than in traditional decompiling step, due to not having to that a large amount of file is written, so that result exports at a terrific speed；It is defeated
Text non-technical personnel out can be understood completely, reduce cost.
Further, as shown in Fig. 2, based on information extracting method in above-mentioned application, the present invention further correspondingly provides one kind
Intelligent terminal, the intelligent terminal include: processor 10, memory 20 and display 30.Fig. 2 illustrates only the portion of intelligent terminal
Subassembly, it should be understood that being not required for implementing all components shown, the implementation that can be substituted is more or less
Component.
The memory 20 can be the internal storage unit of the intelligent terminal in some embodiments, such as intelligence is eventually
The hard disk or memory at end.The external storage that the memory 20 is also possible to the intelligent terminal in further embodiments is set
Plug-in type hard disk that is standby, such as being equipped on the intelligent terminal, intelligent memory card (Smart Media Card, SMC), safe number
Word (Secure Digital, SD) card, flash card (Flash Card) etc..Further, the memory 20 can also be wrapped both
The internal storage unit for including the intelligent terminal also includes External memory equipment.The memory 20 is installed on described for storage
The application software and Various types of data of intelligent terminal, such as the program code etc. of the installation intelligent terminal.The memory 20 is also
It can be used for temporarily storing the data that has exported or will export.In one embodiment, it is stored with and answers on memory 20
With middle information extracting program 40, information extracting program 40 can be performed by processor 10, to realize in the application in the application
The information extracting method in.
The processor 10 can be in some embodiments a central processing unit (Central Processing Unit,
CPU), microprocessor or other data processing chips, for running the program code stored in the memory 20 or processing number
According to, such as execute information extracting method etc. in the application.
The display 30 can be light-emitting diode display, liquid crystal display, touch-control liquid crystal display in some embodiments
And OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) touches device etc..The display 30 is used
In the information for being shown in the intelligent terminal and for showing visual user interface.The component 10- of the intelligent terminal
30 are in communication with each other by system bus.
In one embodiment, realized when information extracting program 40 during processor 10 is executed and applied in the memory 20 with
Lower step:
APK file is decompressed, it is .dex file that suffix is obtained in the APK file after decompression；
.dex file header is read, the quantity and character string structure of character string are determined according to the .dex file header, according to institute
It states character string structure and obtains offset of the character string in the .dex file, character string is read according to the offset；
The resource file for executing all character string lists for including in pre-set commands output APK, according to character string information knot
It closes regular expression matching and goes out application message.
The decompression APK file, it is .dex file that suffix is obtained in the APK file after decompression, comprising:
APK file is obtained, the suffix name of the APK file is revised as zip；
The APK file for having modified suffix name is decompressed by decompression tool, and literary from the APK after decompression
It is .dex file that suffix is obtained in part.
The reading .dex file header determines the quantity and character string structure of character string, root according to the .dex file header
Offset of the character string in the .dex file is obtained according to the character string structure, character string is read according to the offset
Part, comprising:
.dex file header is read, according to the stringIdsSize and stringIdsOff in the .dex file header structure
The value of section determines the quantity and character string structure of character string；
Have in the character string structure and the value of only one field has recorded character string in the .dex file
Offset reads character string according to the offset.
The resource file for executing all character string lists for including in pre-set commands output APK, believes according to character string
Breath combines regular expression matching to go out application message, comprising:
Order aapt dump strings is executed using Android strapping tool, exports all character tandems for including in APK
The resource file of table；
According to character string information, application message is obtained in conjunction with regular expression matching, and export and use to analysis personnel.
The resource file does not include the character string in code.
The application message includes text, IP, URL and domain name.
It is described to execute order aapt dump strings using Android strapping tool, export all characters for including in APK
The resource file of tandem table specifically:
Using the Android strapping tool provided in Android sdk at the build-tools of sdk, order aapt is used
Dump strings " prints the resource file of all character string lists for including in APK.
It is described to execute order aapt dump strings using Android strapping tool, export all characters for including in APK
After the resource file of tandem table further include:
Merge two character string lists, removes repetition and idle character string exports again.
Further, the present invention also provides a kind of storage mediums, wherein the storage medium is stored with information in application and mentions
Program fetch realizes information extracting method in application as described above when information extracting program is executed by processor in the application
Step.
In conclusion the present invention provides information extracting method, intelligent terminal and storage medium in a kind of application, the method
It include: decompression APK file, it is .dex file that suffix is obtained in the APK file after decompression；.dex file header is read, according to institute
Quantity and character string structure that .dex file header determines character string are stated, character string is obtained described according to the character string structure
.dex the offset in file reads character string according to the offset；Execute all words for including in pre-set commands output APK
The resource file for according with tandem table, goes out application message according to character string information combination regular expression matching.The present invention realizes certainly
Key message in dynamic and high efficiency extraction APK does not have to that a large amount of file is written, so that result exports at a terrific speed.
Certainly, those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method,
It is that related hardware (such as processor, controller etc.) can be instructed to complete by computer program, the program can store
In a computer-readable storage medium, described program may include the process such as above-mentioned each method embodiment when being executed.
Wherein the storage medium can be memory, magnetic disk, CD etc..
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. information extracting method in a kind of application, which is characterized in that information extracting method includes: in the application
APK file is decompressed, it is .dex file that suffix is obtained in the APK file after decompression；
.dex file header is read, the quantity and character string structure of character string are determined according to the .dex file header, according to the word
It accords with string structure and obtains offset of the character string in the .dex file, character string is read according to the offset；
The resource file for executing all character string lists for including in pre-set commands output APK, combines just according to character string information
Then expression formula matches application message.
2. information extracting method in application according to claim 1, which is characterized in that the decompression APK file is decompressing
It is .dex file that suffix is obtained in APK file afterwards, comprising:
APK file is obtained, the suffix name of the APK file is revised as zip；
The APK file for having modified suffix name is decompressed by decompression tool, and from the APK file after decompression
Acquisition suffix is .dex file.
3. information extracting method in application according to claim 2, which is characterized in that the reading .dex file header, root
The quantity and character string structure that character string is determined according to the .dex file header obtain character string in institute according to the character string structure
The offset in .dex file is stated, character string part is read according to the offset, comprising:
Read .dex file header, according in the .dex file header structure stringIdsSize and stringIdsOff sections
It is worth the quantity and character string structure for determining character string；
Have in the character string structure and the value of only one field has recorded offset of the character string in the .dex file
Amount reads character string according to the offset.
4. information extracting method in application according to claim 3, which is characterized in that the execution pre-set commands output
The resource file of all character string lists for including in APK goes out application letter according to character string information combination regular expression matching
Breath, comprising:
Order aapt dump strings is executed using Android strapping tool, exports all character string lists for including in APK
Resource file；
According to character string information, application message is obtained in conjunction with regular expression matching, and export and use to analysis personnel.
5. information extracting method in application according to claim 4, which is characterized in that the resource file does not include code
In character string.
6. information extracting method in application according to claim 4, which is characterized in that the application message include text,
IP, URL and domain name.
7. information extracting method in application according to claim 4, which is characterized in that described to be held using Android strapping tool
Line command aapt dump strings exports the resource file of all character string lists for including in APK specifically:
Using the Android strapping tool provided in Android sdk at the build-tools of sdk, order aapt dump is used
Strings " prints the resource file of all character string lists for including in APK.
8. information extracting method in application according to claim 1, which is characterized in that described to be held using Android strapping tool
Line command aapt dump strings is exported in APK after the resource file of all character string lists for including further include:
Merge two character string lists, removes repetition and idle character string exports again.
9. a kind of intelligent terminal, which is characterized in that the intelligent terminal includes: memory, processor and is stored in the storage
Information extracting program on device and in the application that can run on the processor, information extracting program is by the place in the application
Manage the step of information extracting method in such as described in any item applications of claim 1-8 is realized when device executes.
10. a kind of storage medium, which is characterized in that the storage medium is stored with information extracting program in application, the application
It realizes when middle information extracting program is executed by processor such as information extracting method in the described in any item applications of claim 1-8
Step.
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| CN111045686A (en) * | 2019-12-16 | 2020-04-21 | 北京智游网安科技有限公司 | Method for improving application decompilation speed, intelligent terminal and storage medium |
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Application publication date: 20191025 |