CN112230941A - Java Card package and application program installation method and tool - Google Patents
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Abstract
A Java Card package and installation method and tool of application program, carry on the analysis and construction of the package and class while downloading and installing, and store in the nonvolatile memory device, make the application program load it into the memory directly while starting, and has saved the program and started or switched over the time effectively; meanwhile, the adaptability to various hardware communication interfaces is improved through the arrangement of the hardware abstraction layer. Compared with the prior art, the method has the advantages of high starting or switching speed of the specific application program, supporting diversification of communication interfaces and the like.
Description
Technical Field
The invention relates to the technical field of embedded computers, in particular to a Java Card package and an application program installation method and tool.
Background
A large number of mobile devices or embedded devices are embedded with security chips or modules, and in order to improve the development efficiency of application programs, the Java Card virtual machine technology in such security chips or modules is widely adopted.
In the current Java Card virtual machine technology system, a CAP (converted applet) file generated by an application program needs to communicate with an installation tool running on a secure chip or module through a download tool running on a development platform or a mass production platform (usually a PC), acquire the CAP file, perform authority verification and version check on the CAP file, and then download the CAP file into the secure chip or module supporting the Java Card virtual machine technology. However, the application program downloaded in this way needs a long time when being started; when the application program needs to be switched in some services, a certain time is spent, and the application requirements cannot be met in some application scenes with requirements on program starting time and switching efficiency;
on the other hand, the Java Card virtual machine system is mostly applied to smart cards before the security chip or module is not popularized, and the communication interface adopts a multi-defined interface of the 7816-3 specification, which is single when facing the current situation of various application requirements.
Disclosure of Invention
The present disclosure provides a Java Card package and an application program installation method and tool, which can shorten the Java Card virtual machine program start-up or switching time.
The present disclosure provides a Java Card package and an application program installation method, including the following steps:
acquiring a CAP file;
gradually analyzing the CAP file, checking and verifying the package and the application program in the package, and constructing and storing a data structure body of the package and the class in the package under the condition that the checking and verifying are passed;
and after the checking and checking pass, allowing the current package and the application programs in the package to be installed or updated, and after the installation or the update is completed, updating the information records of the installed package and the application programs.
Optionally, the gradually parsing the CAP file, checking and verifying the packet and the application program in the packet, and constructing and storing a data structure of the current packet and the class in the packet under a condition that the checking and verifying is passed specifically includes the following steps:
analyzing and acquiring general information of the current packet, and checking the packet;
if the checking passes, establishing a packet structure body, storing related information, and performing information analysis and checking of an application program;
if the application program passes the verification or the package does not contain the application program, performing subsequent analysis to finish the acquisition of the package and the class structure information; gradually constructing and perfecting a data structure body of the package and the class according to the acquired structure information of the package and the class in the process;
and storing the structure body of the package and the class into a nonvolatile hardware storage device.
Optionally, the data structure of the package and the class may be directly loaded into a memory space during the operation of the application program, and directly obtain the bytecode and the operand of the function to be executed according to the address content in the data structure.
Optionally, the installation method further includes the following steps:
and after the package in the current CAP file and the application program in the package are installed or updated, deleting the current CAP file to save the storage space.
The present disclosure also provides a Java Card package and an application program installation tool, including:
the data communication module is used for acquiring the CAP file;
the file analysis module is configured to analyze the CAP file, extract check and verification information in the CAP file and send the check and verification information to the application management module, and construct and store a data structure body of a packet and a class in the packet in the CAP file under the condition that the check and verification of the application management module are passed;
and the application management module is configured to check and verify the application programs in the package and the package in the CAP file, allow the package and the application programs in the package to be installed or updated after the check and verification pass, and update the information records of the installed package and the application programs after the installation or update is completed.
Optionally, the file parsing module includes:
the analysis unit is configured to gradually analyze the CAP file, extract the check information and send the check information to the application management module, and perform subsequent analysis after the check of the application management module passes, thereby completing the acquisition of the package and the like structural information;
and the structure body construction unit is configured to construct a data structure body of the package and the class according to the structure information of the package and the class acquired by the analysis unit and store the data structure body in the nonvolatile hardware storage device when the check and check of the application management module pass.
Optionally, the data structure of the package and the class may be directly loaded into a runtime memory space when the program runs, and directly obtain the bytecode and the operand of the function to be executed according to the address content in the data structure.
Optionally, the application management module is further configured to delete the original CAP file after the current package and the application program in the package are installed or updated, so as to save the storage space.
Optionally, the installation tool further includes a hardware abstraction layer, and the data communication module communicates with various hardware communication interfaces by calling a communication interface provided by the hardware abstraction layer.
Optionally, the communication interface type supported by the hardware abstraction layer includes 7816-3, SWP, I2C, SPI, and PCIe.
According to the Java Card package and the application program installation method and tool, the package and the class are analyzed and constructed during downloading and installation and are stored in the nonvolatile storage device, so that the application program can be directly loaded into a memory during starting, and the program starting or switching time is effectively saved; meanwhile, the adaptability to various hardware communication interfaces is improved through the arrangement of the hardware abstraction layer. Compared with the prior art, the beneficial effect of this disclosure is: the application program is started or switched quickly; class analysis and construction work is carried out after the check and verification are passed, so that waste of system resources is avoided; and thirdly, the diversification of communication interfaces is supported.
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The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 shows a flow diagram of an exemplary embodiment for parsing a CAP file;
FIG. 2 shows a data structure diagram of parsing packets and classes formed by CAP files in accordance with an exemplary embodiment;
FIG. 3 shows a schematic view of an exemplary embodiment of the installation tool composition.
Detailed Description
Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
According to an exemplary Java Card package and application installation method, the method comprises the following steps:
step 1, acquiring a CAP file to be installed.
And step 2, gradually analyzing the acquired CAP file, checking and verifying the installation authority, version and the like of the CAP file, and constructing and storing data structure bodies of the package and the class in the package in the CAP file under the condition that the checking and verifying are passed.
The data structure is a data structure which can be directly used by the Java Card virtual machine in the execution stage of the application program and does not need to be analyzed and analyzed. The storage of the data structure is preferably stored in a non-volatile hardware storage device, such as Flash.
And step 3, after the checking and verification are passed, allowing the current package and the application programs in the package to be installed or updated, and after the installation or the update is completed, updating the information records of the installed package and the application programs.
It can be seen that, in the exemplary embodiment, by analyzing and constructing a data structure body which can be directly used by the Java Card virtual machine in the application program execution stage when the file is downloaded, the initialization and starting efficiency of the application program is effectively improved, the response time of the application program to an external command when the application program is started is shortened, the switching time between the application programs running on the Java Card virtual machine is also shortened, the efficiency of the whole system is improved, and the requirements of clients having requirements on the starting and running efficiency can be met.
In an exemplary embodiment, the detailed flow of step 2 is shown in fig. 1, and comprises the following steps:
step 2.1, analyzing the Header assembly to obtain general information of the package, such as name and the like;
step 2.2, checking and checking the installation authority, version and the like of the package, if the checking and checking are passed, establishing a data structure body of the package, storing related information, and performing subsequent analysis, otherwise, finishing the analysis of the current package;
step 2.3, analyzing the Directory component to obtain the data size of other components;
step 2.4, if the Applet component exists, analyzing the Applet component, acquiring the content of an install function, checking and verifying the installation authority, version and the like of an application program in the component, if the checking and verifying are passed, entering the subsequent analysis, and if not, finishing the analysis of the current packet;
if not, skipping this step;
step 2.5, analyzing the Class component, and establishing a Class data structure basic framework;
step 2.6, analyzing the Method components, and filling the type, the number of parameters, the required stack and the size of the local variable space of the Method into a data structure body of the class;
step 2.7, analyzing the Static Field component, and filling variables related to the class into a data structure body of the class;
step 2.8, storing the ConstantPool and ReferenceLocation component data into a hardware storage device, and updating a hardware address of the ConstantPool and ReferenceLocation component data into a data structure body of the packet, wherein the hardware address refers to an address in the hardware storage device;
step 2.9, analyzing the Descriptor component, writing the bytes of the method into the hardware storage equipment, and updating the hardware address of the method into the data structure body of the class;
and 2.10, writing the data structure bodies of the packages and the classes into a hardware storage device so that the application program can be directly read into a memory during running.
A data structure diagram of packets and classes formed by parsing a CAP file in the present exemplary embodiment is shown in fig. 2.
Preferably, the method further comprises the step of deleting the current package after the current package and the application program in the package are installed or updated.
As shown in fig. 3, the Java Card virtual machine installation tool according to an exemplary embodiment includes:
a data communication module: the system is used for communicating with a downloading tool on a development platform or a mass production platform to acquire a CAP file;
a file analysis module: the system is used for analyzing the acquired CAP file according to various CAP file formats, providing the CAP file to an application management module for checking and verifying, forming a data structure which can be directly used by a Java Card virtual machine in the execution stage of the application program without analyzing and analyzing under the condition that the checking and verifying are passed, and storing the data structure in a nonvolatile hardware storage module, such as Flash and the like;
an application management module: the method is used for managing the information such as the identification and the corresponding storage address of the installed package and the application program, checking and checking the information of the package or the application program in the CAP file, and judging whether the package or the application program can be installed or updated. And if the check and verification are passed, allowing the current package and the application programs in the package to be installed.
The exemplary installation tool can run in a Java Card Virtual Machine system defined by Java Card 3 Platform Virtual Machine Specification, Classic Edition, and meets the functions defined by relevant specifications and complies with the restrictions set forth by the specifications.
As a preferred scheme, the exemplary installation tool further includes a hardware abstraction layer, and the data communication module calls a communication interface of the hardware abstraction layer to perform CAP file acquisition.
By configuring the hardware abstraction layer, the data communication module can support, but is not limited to, the following hardware interface types for data transmission: 7816-3, SWP, I2C. SPI, PCIe. Providing a hardware abstraction layer, so that the Java Card virtual machine installation tool can add new hardware interface codes according to the requirements of actual hardware and the interface requirements of the abstraction layer to support new hardwareAnd (4) a component interface.
As a preferred scheme, the application management module is further configured to delete the CAP file and release system resources in time after the current package and the application program in the package are installed or updated.
According to the installation method and the tool obtained in the manner, data are analyzed and processed in the installation stage to form a specific data structure and are stored, and when a program is required to be executed, the specific data structure is directly loaded into a memory for use, so that the time required by class loading and data initialization is reduced, the response speed of the program execution initial stage is improved, and the time for switching among programs is reduced;
meanwhile, because the abstraction of the bottom hardware is realized, including the abstraction of the bottom hardware communication interface, the adopted hardware interface can be configured according to the hardware communication interface of the actually used safety chip or safety module, or the software code of the hardware communication interface is added according to the requirement of the abstraction of the hardware interface, so that the hardware communication interface can be conveniently transplanted to different hardware platforms.
The foregoing is illustrative of the present invention and various modifications and changes in form or detail will readily occur to those skilled in the art based upon the teachings herein and the application of the principles and principles disclosed herein, which are to be regarded as illustrative rather than restrictive on the broad principles of the present invention.
Claims (10)
1. A Java Card package and application program installation method comprises the following steps:
acquiring a CAP file;
gradually analyzing the CAP file, checking and verifying the package and the application program in the package, and constructing and storing a data structure body of the package and the class in the package under the condition that the checking and verifying are passed;
and after the checking and checking pass, allowing the current package and the application programs in the package to be installed or updated, and after the installation or the update is completed, updating the information records of the installed package and the application programs.
2. The Java Card package and application program installation method according to claim 1, wherein the step-by-step parsing of the CAP file, checking and verifying the package and the application program in the package, and constructing and storing the data structure of the current package and class in the package under the condition that the checking and verifying is passed specifically comprises the steps of:
analyzing and acquiring general information of the current packet, and checking the packet;
if the checking passes, establishing a packet structure body, storing related information, and performing information analysis and checking of an application program;
if the application program passes the verification or the package does not contain the application program, performing subsequent analysis to finish the acquisition of the package and the class structure information; gradually constructing and perfecting a data structure body of the package and the class according to the acquired structure information of the package and the class in the process;
and storing the structure body of the package and the class into a nonvolatile hardware storage device.
3. The Java Card package and method for installing an application according to claim 1, wherein the data structure of the package and the class can be directly loaded into a memory space during the operation of the application, and directly obtain the bytecode and operand of the function to be executed according to the address content in the data structure.
4. The Java Card package and application program installing method according to claim 1, further comprising the steps of:
and after the package in the current CAP file and the application program in the package are installed or updated, deleting the current CAP file to save the storage space.
5. A Java Card package and application installation tool, comprising:
the data communication module is used for acquiring the CAP file;
the file analysis module is configured to analyze the CAP file, extract check and verification information in the CAP file and send the check and verification information to the application management module, and construct and store a data structure body of a packet and a class in the packet in the CAP file under the condition that the check and verification of the application management module are passed;
and the application management module is configured to check and verify the application programs in the package and the package in the CAP file, allow the package and the application programs in the package to be installed or updated after the check and verification pass, and update the information records of the installed package and the application programs after the installation or update is completed.
6. The Java Card package and application installation tool of claim 5, wherein the file parsing module comprises:
the analysis unit is configured to gradually analyze the CAP file, extract the check information and send the check information to the application management module, and perform subsequent analysis after the check of the application management module passes, thereby completing the acquisition of the package and the like structural information;
and the structure body construction unit is configured to construct a data structure body of the package and the class according to the structure information of the package and the class acquired by the analysis unit and store the data structure body in the nonvolatile hardware storage device when the check and check of the application management module pass.
7. The Java Card package and application program installation tool of claim 5, wherein the data structure of the package and the class can be directly loaded into the memory space during the program running, and directly obtain the bytecode and operand of the function to be executed according to the address content in the data structure.
8. The Java Card package and application installation tool of claim 5, wherein the application management module is further configured to delete the original CAP file after the installation or update of the application in the current package and package is completed, so as to save storage space.
9. The Java Card package and application installation tool of claim 5, wherein the installation tool further comprises a hardware abstraction layer, and the data communication module communicates with various hardware communication interfaces by calling the communication interfaces provided by the hardware abstraction layer.
10. The Java Card package and application installation tool of claim 9, wherein the communication interface types supported by the hardware abstraction layer include 7816-3, SWP, I2C, SPI, and PCIe.
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| CN112230941B (en) | 2024-03-29 |
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