CN108536446A - A kind of Spatialite spatial database encryption methods based on android system - Google Patents
A kind of Spatialite spatial database encryption methods based on android system Download PDFInfo
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- CN108536446A CN108536446A CN201810351315.9A CN201810351315A CN108536446A CN 108536446 A CN108536446 A CN 108536446A CN 201810351315 A CN201810351315 A CN 201810351315A CN 108536446 A CN108536446 A CN 108536446A
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- G06F8/00—Arrangements for software engineering
- G06F8/40—Transformation of program code
- G06F8/41—Compilation
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- 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
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention discloses a kind of interfaces using simple, the low Spatialite spatial database encryption methods based on android system of resources occupation rate, includes the following steps：S1, NDK translation and compiling environments are built；S2, resource and code are downloaded；S3, Encryption Model is determined；S4, selection Encryption Algorithm；S5, management key and key；S6, encryption is realized；S7, compiling and generation library file；S8, interface call and application.The present invention solve the problems, such as it is in the prior art cannot the common operations such as data query, analysis and statistics directly be carried out to encrypted Sqlite spatial databases, and solve the problems, such as that encrypted Sqlite spatial databases are high using complicated and resources occupation rate；It is widely used in the industries such as survey of natural resources, geographical national conditions investigation, land resources law enforcement supervision and Forestry Investigation.
Description
Technical field
The invention belongs to database technical fields, and in particular to a kind of spaces Spatialite based on android system
Database encryption method.
Background technology
With economic construction and the continuous development of intelligent terminal and Mobile GIS, CPU, GPU of terminal, memory, display
The hardware performances such as screen, camera, mobile GPS chip, storage and integrated higher and higher, many PostgreSQL databases and GIS software
All support mobile terminal application.Spatialite is simple, practical based on one made of the extension of SQLite PostgreSQL database engines
Lightweight spatial database, abide by ACID (Atomicity- atomicities, Consistency- consistency, Isolation- every
From property, Durability- persistence) relational database management system characteristic and OGC standards, support cross-platform spatial data to grasp
Make, various types of spatial datas such as point, line, surface can easily and effectively be organized by Geometry type fields, to move
The integrated management of the attribute data, spatial data of moved end provides a kind of extraordinary solution with application,
Spatialite provide AsText, GeomFromText, Intersects, Relate, Distance, Covers,
The spatial operations such as Overlaps, Gunion and analytic function are widely used to geographical national conditions investigation, land resources law enforcement prison
It examines, the industries such as Forestry Investigation.
Based on the types of applications system that GIS data is established, data have sensibility, importance, and mobile terminal is in band
While coming portable, mobile end data has the safety problems such as easy to be lost, vulnerable.Meanwhile attacker may utilize behaviour
Make system or database loophole, or physical contact mobile terminal and database system file, so as to bypass authentication and
Access control and directly steal or altered data library content.Therefore, the data safety of mobile terminal application system seems particularly heavy
Want and protrude, database and its data are encrypted be security from attacks threaten effective means, it is necessary to ensuring data safety
With could carry out types of applications under conditions of protection extensively.Currently, the data safety of mobile terminal application system relies primarily on number
It is realized according to encipher-decipher method, there are mainly two types of modes：First, the data content to lane database is encrypted；Second is that being using database
Entire database file is encrypted in the characteristic of unique file.Above two mode has the following problems：
(1) one encrypted data of mode cannot directly carry out data query, analysis and statistics, to realize data query,
The functions such as analysis, statistics, it is necessary to first data content is decrypted or be converted；
(2) resources occupation rate of mode two is high, first, when establishing database connection, it is necessary to first to encryption data library file
It is decrypted, the process in ciphertext data library is the high process of CPU usage；Second is that ciphertext data library need to occupy database file phase
When memory space, have higher requirements to the memory capacity of mobile terminal；Third, when closing database, to ensure data safety,
The database after decryption must be deleted；Fourth, during the database application after opening database, before closing database, it is non-to award
Power user can be decrypted completely by the illegal means such as replicating, steal after database, there are very big security risks；
Fifth, resources occupation rate is in strong positive correlation with database file size, i.e. data volume in database gets over large resource occupancy
It is higher, using effect is poorer.
At this stage, the api interface that encrypting and decrypting is realized specifically for Spatialite spatial databases, existing research be there is no
It is concentrated mainly on the research and application of the data base encryption function of SQLite.
Invention content
For above-mentioned deficiency in the prior art, the invention discloses a kind of interfaces using simple, resources occupation rate is low
Spatialite spatial database encryption methods based on android system, solve it is in the prior art cannot direct pair plus
The problem of Sqlite spatial databases after close carry out the common operations such as data query, analysis and statistics, and solve encryption
Sqlite spatial databases afterwards use the complicated and high problem of resources occupation rate；It is widely used in survey of natural resources, geography
The industries such as national conditions investigation, land resources law enforcement supervision and Forestry Investigation.
In order to reach foregoing invention purpose, the technical solution adopted by the present invention is：
A kind of Spatialite spatial database encryption methods based on android system, include the following steps：
S1：NDK translation and compiling environments are built, that is, build the NDK translation and compiling environments needed for installation Spatialite spatial databases；
S2：Resource and code are downloaded, that is, downloads resource and code needed for installation Spatialite spatial databases compiling；
S3：It determines Encryption Model, that is, determines the model that Spatialite spatial databases are encrypted；
S4：Encryption Algorithm, i.e., the Encryption Model determined according to step S3 is selected to select to Spatialite spatial databases
The algorithm being encrypted；
S5：Key and key are managed, i.e., clear-text passwords input by user is used for cryptographic operation by transformation.
S6：It realizes encryption, that is, the spare interface for utilizing Spatialite spatial databases to provide, and is determined using step S3
Encryption Model and step S4 selection Encryption Algorithm, write the encryption that source code realizes database file with standard C language；
S7：Compiling and generation library file, i.e., input order is compiled under NDK translation and compiling environments, and generates Android systems
Library file needed for system operation；
S8：Interface calls and application, i.e., in Android development environments, the library file that steps for importing S7 is obtained, calling connects
Cause for gossip is existing to operate database.
This programme has the beneficial effect that：
The present invention is in order to solve the problem of data safety of Spatialite spatial databases, in the existing Spatialite that increases income
On the basis of spatial database, its interface is extended, it is empty that Spatialite is provided under the premise of not influencing existing interface and function module
Spatial database encryption method, can directly carry out data query, analysis and statistics, and compiled generation android system runs institute
The library file needed realizes the database file bottom encryption of Android device, solves interface in the prior art and use again
Miscellaneous, the problems such as resources occupation rate is high.
Further, NDK translation and compiling environments are built in step S1, included the following steps：
S1-1：It downloads and simulated environment tool is installed, while configuring NDK environmental variances, called for compiler directive；
S1-2：Android-NDK compressed packages are downloaded, decompresses, name and configure system environment variable；
S1-3：It whether normal tests NDK translation and compiling environments, enters step S2 if normal, otherwise enter step S1-1.
Further, resource and code are downloaded in step S2, are included the following steps：
S2-1：Spatialite source codes are downloaded, that is, download Spatialite-Android, completion is downloaded and solution is depressed into D
Packing catalogue；
S2-2：Download resource needed for compiling Spatialite spatial databases.
Further, in step S2-2 required database include the libraries geos, the libraries proj, the libraries Sqlite and
The libraries libspatialite.
Further, in step S4, the candidate algorithm of the AES Advanced Encryption Standards in cryptography, i.e. Rijndael are selected
Encryption Algorithm.
Above-mentioned further scheme has the beneficial effect that：
Rijndael Encryption Algorithm enciphering rates are fast, efficient, calculation amount is small, complexity is low and safety is good, use
Key and block length be 32 integral multiples (with 128 for lower limit, 256 be the upper limit), the aes algorithm than standard is supported
Larger range of block and key length, had both met data base encryption demand, had also ensured data safety and were difficult by attacker
It destroys.
Further, library file is compiled and generated in step S7, is included the following steps：
S7-1：File is downloaded in configuration；
S7-2：Configure translation and compiling environment variable；
S7-3：The environmental simulation tool of operating procedure S1 installations, input order are compiled, and generate android system fortune
The required library file of row.
Further, the operation carried out to database in step S8 includes that data build library, encrypted access and storage data.
Further, interface is called and is applied in step S8, is included the following steps：
S8-1：Clear data library is encrypted, database is opened, calls rekey function setup database passwords, is closed
Close database；
S8-2：Encrypting database is read out and is operated, database is opened, calls key function input database passwords,
Encrypting database is read, input order operates database, closes database.
Description of the drawings
Fig. 1 is a kind of Spatialite spatial database encryption method flow charts based on android system；
Fig. 2 is to build NDK translation and compiling environment method flow diagrams；
Fig. 3 is to download resource and code method flow chart；
Fig. 4 is to compile and generate library file method flow diagram；
Fig. 5 is that interface calls and application process flow chart.
Specific implementation mode
The specific implementation mode of the present invention is described below, in order to facilitate understanding by those skilled in the art this hair
It is bright, it should be apparent that the present invention is not limited to the ranges of specific implementation mode, for those skilled in the art,
As long as various change is in the spirit and scope of the present invention that the attached claims limit and determine, these variations are aobvious and easy
See, all are using the innovation and creation of present inventive concept in the row of protection.
In the embodiment of the present invention, as shown in Figure 1, a kind of Spatialite spatial databases based on android system add
Decryption method includes the following steps：
S1：NDK translation and compiling environments are built, that is, build the NDK translation and compiling environments needed for installation Spatialite spatial databases, by
It is write in the native language that Spatialite is C/C++, and Android acquiescence development languages are Java, are compiled on Windows
NDK (Native Development Kit) environment must be used by translating Spatialite；
NDK translation and compiling environments are built, as shown in Fig. 2, including the following steps：
S1-1：Installation Cygwin is downloaded, Linux environment tool is simulated, while configuring NDK environmental variances, facilitates ndk-
Build compiler directives are called,；
S1-2：NDK compressed packages are downloaded, decompresses and names, storage path cannot include space, and filename and folder name are not
It can be long；
S1-3：It whether normal tests NDK translation and compiling environments, enters step S2 if normal, otherwise enter step S1-1；
S2：Resource and code are downloaded, that is, downloads resource and code needed for installation Spatialite spatial databases compiling,
Spatialite is the spatial spread made based on the Sqlite to increase income completely, realizes that Spatialite spatial datas are encrypted, under palpus
Carry following resource；
Resource and code are downloaded, as shown in figure 3, including the following steps：
S2-1：Spatialite source codes are downloaded, that is, download Spatialite-Android, is downloaded and is completed and looked for after decompressing
To spatialite-android-library and move it to D packing catalogues；
S2-2：Download the libraries geos, the libraries proj, the libraries Sqlite and the libraries libspatialite；
S3：It determines Encryption Model, that is, determines the model that Spatialite spatial databases are encrypted, Spatialite
Encryption Model has data and information encryption function, and the expense of time, space are small, Data Physical access before complete plus/
Decryption；
S4：Encryption Algorithm, i.e., the Encryption Model determined according to step S3 is selected to select to Spatialite spatial databases
The algorithm being encrypted, has chosen that enciphering rate in cryptography is fast, efficient, calculation amount is small, complexity is low and safety is good
The candidate algorithm of Advanced Encryption Standard, i.e. Rijndael Encryption Algorithm, had both met data base encryption demand, had also ensured data peace
It is difficult entirely to be destroyed by attacker；
S5：Key and key are managed, i.e., clear-text passwords input by user is used for cryptographic operation by transformation；To user
The length of setting is not fixed and cannot function as the password progress conversion process of key, that is, utilizes transforming function transformation function
CodecGenerateReadKey (Codec*codec, char*userPassword, int passwordLength) is to input
Password converted, the result after being converted is encrypted database as key；
S6：Realization encryption, the spare interface sqlite3_key () provided using Spatialite spatial databases,
Sqlite3_rekey () and sqlite3CodecAttach () cryptographic API interface, using the step S3 Encryption Model determined and
The Encryption Algorithm of step S4 selections, the encryption that source code realizes database file is write with standard C language；Function sqlite3_
Key () realizes that the normal of data is deposited for password or key used in specified database, encrypted data library by this function
It takes；Function sqlite3_rekey () is used to reset password or key for database, is to realize data base encryption, more Xinmi City
Code or the function for removing password；Function sqlite3CodecAttach () be responsible for by key (if input be password if need profit
Password is converted into key with the step S5 methods provided and function) and page coding function be associated with database, be several
The core function of encryption, decryption is realized according to library；
S7：Compiling and generation library file input ndk-build-j8 orders and are compiled, and generate android system
So library files needed for operation；
Compiling and generation library file, as shown in figure 4, including the following steps：
S7-1：File is downloaded in configuration, finds spatialite- after the Spatialite source codes decompression downloaded in step 2
Jni subdirectories in android-library catalogues, the libraries libspatialite that step 2 is downloaded, the libraries geos, the libraries proj,
The libraries Sqlite all solutions are depressed into jni subdirectories；The corresponding source Code copying that step S5 and step S6 are write is to jni subdirectories
In file after the decompression of the libraries lower Sqlite；
S7-2：Translation and compiling environment variable is configured, realizing Spaialite databases because having carried out Function Extension to Sqlite adds
It is close, the LOCAL_SRC_FILES parameters of change acquiescence when Sqlite is compiled, and addition # is set in first place in sqlite.c files
Define SQLITE_HAS_CODEC configurations, for identifying or opening Spaialite data base encryption functions；
S7-3：The mounted Linux environment simulation tool Cygwin of operating procedure S1, input ndk-build-j8 orders into
Row compiling generates the library file needed for android system operation, i.e. libjsqlite.so library files；
S8：Interface calls and application, i.e., in Android development environments, the library file that steps for importing S7 is obtained, calling connects
Cause for gossip is existing to carry out database the operation that data build library, encrypted access and storage data；
Interface calls and application, as shown in figure 4, including the following steps：
S8-1：Clear data library is encrypted, database is opened, calls rekey function setup database passwords, is closed
Close database；
(setting clear data library password)：
// encrypting database：
S8-2：Encrypting database is read out and is operated, database is opened, calls key function input database passwords,
Encrypting database is read, input order operates database, closes database.
(read encrypting database and realize the access of data)：
// open database and decryption：
The present invention incorporates a kind of interface using simple, resources occupation rate is low under the Spatialite frames increased income
Spatialite spatial database encryption methods based on android system, can be straight to encrypted Sqlite spatial databases
The common operation such as row data query, analysis and statistics is tapped into, and encrypted Sqlite spatial databases use simple and money
Source occupancy is low, is widely used in the rows such as survey of natural resources, geographical national conditions investigation, land resources law enforcement supervision and Forestry Investigation
Industry.
Claims (8)
1. a kind of Spatialite spatial database encryption methods based on android system, which is characterized in that including walking as follows
Suddenly：
S1：NDK translation and compiling environments are built, that is, build the NDK translation and compiling environments needed for installation Spatialite spatial databases；
S2：Resource and code are downloaded, that is, downloads resource and code needed for installation Spatialite spatial databases compiling；
S3：It determines Encryption Model, that is, determines the model that Spatialite spatial databases are encrypted；
S4：Encryption Algorithm, i.e., the Encryption Model determined according to step S3, selection is selected to carry out Spatialite spatial databases
Encrypted algorithm；
S5：Key and key are managed, i.e., clear-text passwords input by user is used for cryptographic operation by transformation.
S6：It realizes and encrypts, that is, the spare interface for utilizing Spatialite spatial databases to provide, and added using what step S3 was determined
The Encryption Algorithm of close model and step S4 selections, the encryption that source code realizes database file is write with standard C language；
S7：Compiling and generation library file, i.e., input order is compiled under NDK translation and compiling environments, and generates android system fortune
The required library file of row；
S8：Interface calls and application, i.e., in Android development environments, the library file that steps for importing S7 is obtained, and calling interface reality
Now database is operated.
2. the Spatialite spatial database encryption methods according to claim 1 based on android system, feature
It is, builds NDK translation and compiling environments in the step S1, include the following steps：
S1-1：It downloads and simulated environment tool is installed, while configuring NDK environmental variances, called for compiler directive；
S1-2：Android-NDK compressed packages are downloaded, decompresses, name and configure system environment variable；
S1-3：It whether normal tests NDK translation and compiling environments, enters step S2 if normal, otherwise enter step S1-1.
3. the Spatialite spatial database encryption methods according to claim 1 based on android system, feature
It is, resource and code is downloaded in the step S2, is included the following steps：
S2-1：Spatialite source codes are downloaded, that is, download Spatialite-Android, completion is downloaded and solution is depressed into D packings
Catalogue；
S2-2：Download resource needed for compiling Spatialite spatial databases.
4. the Spatialite spatial database encryption methods according to claim 3 based on android system, feature
It is, required database includes the libraries geos, the libraries proj, the libraries Sqlite and the libraries libspatialite in the step S2-2.
5. the Spatialite spatial database encryption methods according to claim 1 based on android system, feature
It is, in the step S4, selects the candidate algorithm of the AES Advanced Encryption Standards in cryptography, i.e. Rijndael Encryption Algorithm.
6. the Spatialite spatial database encryption methods according to claim 1 based on android system, feature
It is, library file is compiled and generated in the step S7, is included the following steps：
S7-1：File is downloaded in configuration；
S7-2：Configure translation and compiling environment variable；
S7-3：The environmental simulation tool of operating procedure S1 installations, input order are compiled, and are generated android system and are run institute
The library file needed.
7. the Spatialite spatial database encryption methods according to claim 1 based on android system, feature
It is, the operation carried out to database in the step S8 includes that data build library, encrypted access and storage data.
8. the Spatialite spatial database encryption methods according to claim 1 based on android system, feature
It is, interface is called and applied in the step S8, is included the following steps：
S8-1：Clear data library is encrypted, database is opened, calls rekey function setup database passwords, closes number
According to library；
S8-2：Encrypting database is read out and is operated, database is opened, calls key function input database passwords, is read
Encrypting database, input order operate database, close database.
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Cited By (1)
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