CN109922063B - Dirty data generation method for multifunctional ammeter communication protocol fuzzy test - Google Patents
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Abstract
The application discloses a dirty data generation method for a multifunctional electric meter communication protocol fuzzy test. Therefore, the method can ensure that the dirty data generated based on the strategy template accords with the communication protocol by creating the strategy template in advance according to the session message and the communication protocol, avoid the problem that the test cannot be completed because the data is randomly generated and the test cannot be completed because the data does not accord with the communication protocol, and improve the efficiency of the fuzzy test. In addition, the application also provides a dirty data generation device, equipment and a computer readable storage medium for the multifunctional ammeter communication protocol fuzzy test, and the functions of the device and the equipment correspond to the method.
Description
Technical Field
The application relates to the field of communication, in particular to a dirty data generation method, a dirty data generation device, dirty data generation equipment and a computer-readable storage medium for a multifunctional electric meter communication protocol fuzzy test.
Background
The electric energy metering automation system is the most core and key system in the field of intelligent power utilization, and is a force application point and a foot drop point for building an intelligent power grid. The multifunctional electric energy meter is communicated with the acquisition terminal and receives a control instruction through physical access modes such as an electronic line carrier, an RS485 bus and the like, however, the multifunctional electric energy meter is widely exposed in a social environment, and an exposed communication interface is in risk of being illegally accessed at any time; the multi-functional electric energy meter has thousands of domestic brands and models, the technical strength of various manufacturers is uneven, and different safety problems may occur during the processing of the multi-functional electric energy meter. At present, the detection of the multifunctional electric energy meter mainly focuses on physical performance indexes such as electromagnetism, temperature, air pressure and the like, and the detection of the protocol processing safety is still deficient. At present, APT (Advanced persistent thread Advanced sustainability Threat) mainly adopts a '0-DAY' vulnerability, basically has no effective defense means, and the only way is to discover and modify the '0-DAY' vulnerability before an attacker masters the vulnerability.
In summary, in order to solve the safety problem of the communication protocol of the multifunctional electric energy meter, a fuzzy test needs to be performed on the communication protocol of the multifunctional electric energy meter, and in the fuzzy test, if only a given data packet is subjected to blind random variation, a generated test case has no pertinence for the multifunctional electric energy meter, and most of the data packets cannot be discarded by the multifunctional electric energy meter due to the fact that the data packets do not conform to the communication protocol, so that the purpose of safety detection cannot be achieved.
Disclosure of Invention
The method, the device, the equipment and the computer readable storage medium are used for solving the problems that the dirty data generated by the traditional dirty data generation method lack pertinence, and more dirty data which do not conform to the communication protocol cannot be tested safely, so that the safety testing efficiency is low.
In order to solve the technical problem, the application provides a dirty data generation method for a multifunctional electric meter communication protocol fuzzy test, which comprises the following steps:
creating a strategy template in advance, wherein the strategy template is obtained by analyzing a session message of the multifunctional electric meter and a communication protocol of the multifunctional electric meter;
and calling the strategy template to generate the pollution data in response to the generation instruction of the pollution data.
Optionally, the creating a policy template in advance specifically includes:
determining a necessary strategy and an optional strategy by analyzing the communication reduction of the session message and the communication protocol of the multifunctional ammeter;
and creating a strategy template according to the necessary strategy and the optional strategy.
Optionally, the mandatory strategy includes any one or any combination of the following: communication address, start symbol, end symbol, check bit;
the selectable strategies include any one or any combination of the following: the random range of the function code, the random range of the data identification and the random range of the data field.
Optionally, the policy template is obtained by analyzing a session message of the multifunctional electric meter and a DL/T645-2007 communication protocol of the multifunctional electric meter.
Optionally, the creating a policy template in advance specifically includes:
collecting conversation messages of multi-model multifunctional electric meters;
and creating a strategy template by analyzing the conversation message and the communication reduction of the communication protocol of the multifunctional ammeter.
Optionally, the creating a policy template by analyzing the session packet and the communication reduction of the multifunctional electric meter communication protocol specifically includes:
judging whether the session message conforms to the communication protocol of the multifunctional ammeter;
and if not, generating a strategy template aiming at the model or the brand.
The application also provides a dirty data generation device of multi-functional ammeter communication protocol fuzzing, includes:
a policy template creation module: the method comprises the steps of creating a strategy template in advance, wherein the strategy template is obtained by analyzing a session message of the multifunctional electric meter and a communication protocol of the multifunctional electric meter;
dirty data generation module: and the strategy template is called to generate the pollution data in response to the generation instruction of the pollution data.
Optionally, the policy template creating module specifically includes:
a policy determination unit: the system is used for determining a necessary strategy and an optional strategy by analyzing the conversation message and the communication reduction of the communication protocol of the multifunctional ammeter;
a policy template creation unit: and the strategy template is created according to the mandatory strategy and the optional strategy.
In addition, this application still provides a dirty data generation equipment of multi-function electric meter communication protocol fuzzing, includes:
a memory: for storing a computer program;
a processor: the computer program is executed to implement the steps of the dirty data generation method for the multifunctional electric meter communication protocol fuzz test.
Finally, the present application also provides a computer readable storage medium, which stores a computer program, and the computer program when executed by a processor implements the steps of the dirty data generation method for the communication protocol fuzz test of a multifunctional electric meter.
According to the dirty data generation method for the multifunctional ammeter communication protocol fuzzy test, the conversation message of the multifunctional ammeter and the multifunctional ammeter communication protocol are analyzed, the strategy template is created in advance, and when dirty data need to be generated, the strategy template is called to generate the dirty data in response to a generation instruction of the dirty data. Therefore, the method can ensure that the dirty data generated based on the strategy template accords with the communication protocol by creating the strategy template in advance according to the session message and the communication protocol, avoid the problem that the test cannot be completed because the data is randomly generated and the test cannot be completed because the data does not accord with the communication protocol, and improve the efficiency of the fuzzy test.
In addition, the application also provides a dirty data generation device, equipment and a computer readable storage medium for the multifunctional ammeter communication protocol fuzzy test, and the functions of the dirty data generation device, the equipment and the computer readable storage medium correspond to the method, and are not repeated herein.
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For a clearer explanation of the embodiments or technical solutions of the prior art of the present application, the drawings needed for the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flowchart illustrating a first implementation of a dirty data generation method for a fuzzy test of a multifunctional electric meter communication protocol according to an embodiment of the present disclosure;
FIG. 2 is a flowchart illustrating a second implementation of a dirty data generation method for a fuzzy test of a multifunctional electric meter communication protocol according to the present application;
FIG. 3 is a functional block diagram of a dirty data generating device for a multifunctional electric meter communication protocol fuzz test provided in the present application;
FIG. 4 is a block diagram of a dirty data generating device for a multifunctional electric meter communication protocol fuzz test provided by the present application.
Detailed Description
The core of the application is to provide the dirty data generation method, the device, the equipment and the computer readable storage medium for the multifunctional ammeter communication protocol fuzzing test, so that the problem that the generated dirty data cannot be subjected to the fuzzing test due to the fact that the dirty data do not accord with the communication protocol is avoided, and the fuzzing test efficiency is improved.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a first embodiment of a dirty data generation method for a multifunctional electric meter communication protocol fuzzing test provided by the present application is described below, where the first embodiment includes:
step S101: and creating a strategy template in advance, wherein the strategy template is obtained by analyzing the session message of the multifunctional electric meter and the communication protocol of the multifunctional electric meter.
Specifically, a policy template of the message is preliminarily determined by analyzing a composition specification of the message in the multifunctional electric meter communication protocol, the policy template is a generation rule of the message, and as an optional implementation manner, the policy template may be determined by reduction in "DL/T645-2007 multifunctional electric meter communication protocol". On the basis, conversation messages of intelligent electric meters of various manufacturers and different models in the production environment can be collected, and then the conversation messages are analyzed to provide data reference for development of strategy templates.
As an alternative implementation mode, the strategy template can be divided into a default strategy and an optional strategy according to the protocol definition content in DL/T645-2007 multifunctional electric energy meter communication protocol. The default policy is mandatory, so the message must contain the policy, i.e. the default policy. The selectable strategies are selectable or not selectable, the number of the selectable strategies is more than or equal to 1, and the selectable strategies and the default strategies are combined to form a message generation rule.
Step S102: and calling the strategy template to generate the pollution data in response to the generation instruction of the pollution data.
The dirty data generated based on the policy template created in the present embodiment conforms to the communication protocol, and the generation instruction may further specify the generation amount of the dirty data.
The method for generating the dirty data of the multifunctional electric meter communication protocol fuzzy test provided by the embodiment is characterized in that a strategy template is created in advance by analyzing the session message of the multifunctional electric meter and the multifunctional electric meter communication protocol, and when the dirty data needs to be generated, the strategy template is called to generate the dirty data in response to a generation instruction of the dirty data. Therefore, the method can ensure that the dirty data generated based on the strategy template accords with the communication protocol by creating the strategy template in advance according to the session message and the communication protocol, avoid the problem that the test cannot be completed because the data is randomly generated and the test cannot be completed because the data does not accord with the communication protocol, and improve the efficiency of the fuzzy test.
The second embodiment of the dirty data generation method for the multifunctional electric meter communication protocol fuzz test provided by the present application is described in detail below, and the second embodiment is implemented based on the first embodiment and is expanded to a certain extent on the basis of the first embodiment. Referring to fig. 2, the second embodiment specifically includes:
step S201: and analyzing the communication reduction of the DL/T645-2007 multifunctional electric meter communication protocol, and determining the necessary strategy and the optional strategy of the multifunctional electric meters of various models.
Specifically, the default policy mainly includes the following elements in consideration of the whole data format: the smart meter comprises a communication address-wildcard or designated address, a data field length algorithm, a start symbol and an end symbol, a check bit algorithm, a data completion algorithm and a default strategy of designated function codes for a special brand and model smart meter. The selectable strategy comprises a function code random range, a data identification random range and a data field random range, and whether a correct password is filled in a password bit when detecting that the function code such as writing data, modifying the password, clearing the demand, clearing the electricity meter and clearing the electricity quantity appears according to the function code of the data packet. Where a data field refers to a sub-bit string corresponding to each data item in a bit string when a data element is composed of several data items.
Step S202: collecting and analyzing session messages of the multifunctional electric meters with multiple models, judging whether the session messages accord with a DL/T645-2007 multifunctional electric meter communication protocol, if so, entering a step S204, and if not, entering a step S203.
Step S203: a must-choose policy for the model or brand is generated.
In this embodiment, data messages in the production environments of smart electric meters of various manufacturers and different models are classified according to the same control code, and are compared with data identification and data fields on the basis of a standard defined in "DL/T645-2007 multifunctional electric energy meter communication protocol", if a difference item is found, a brand and a model are marked, a default strategy for the brand and the model is added, and finally, data support is provided for a default strategy template through comparison of a large amount of data.
Step S204: and determining a generation rule of the pollution data according to the selectable strategy and the mandatory strategy.
Step S205: and in response to the generation instruction of the pollution data, calling the generation rule to generate an expected amount of pollution data.
Therefore, according to the method for generating the dirty data of the multifunctional electric meter communication protocol fuzzy test, the session message of the multifunctional electric meter and the multifunctional electric meter communication protocol are analyzed, the policy template is created in advance, and when the dirty data needs to be generated, the policy template is called to generate the dirty data in response to the generation instruction of the dirty data. Therefore, the method can ensure that the dirty data generated based on the strategy template accords with the communication protocol by creating the strategy template in advance according to the session message and the communication protocol, avoid the problem that the test cannot be completed because the data is randomly generated and the test cannot be completed because the data does not accord with the communication protocol, and improve the efficiency of the fuzzy test.
In the following, a dirty data generating device for a multifunctional electric meter communication protocol fuzz test provided by an embodiment of the present application is introduced, and a dirty data generating device for a multifunctional electric meter communication protocol fuzz test described below and a dirty data generating method for a multifunctional electric meter communication protocol fuzz test described above may be referred to correspondingly.
As shown in fig. 3, the apparatus includes:
the policy template creation module 301: the method comprises the steps of creating a strategy template in advance, wherein the strategy template is obtained by analyzing a session message of the multifunctional electric meter and a communication protocol of the multifunctional electric meter;
the dirty data generation module 302: and the strategy template is called to generate the pollution data in response to the generation instruction of the pollution data.
As an optional implementation manner, the policy template creating module 301 specifically includes:
policy determination unit 3011: the system is used for determining a necessary strategy and an optional strategy by analyzing the conversation message and the communication reduction of the communication protocol of the multifunctional ammeter;
the policy template creation unit 3012: and the strategy template is created according to the mandatory strategy and the optional strategy.
The dirty data generating device for the multifunctional electric meter communication protocol fuzz test of the present embodiment is used for implementing the dirty data generating method for the multifunctional electric meter communication protocol fuzz test, and therefore, specific embodiments of the device may be found in the foregoing embodiment parts of the dirty data generating method for the multifunctional electric meter communication protocol fuzz test, for example, the policy template creating module 301 and the dirty data generating module 302 are respectively used for implementing steps S101 and S102 in the dirty data generating method for the multifunctional electric meter communication protocol fuzz test. Therefore, specific embodiments thereof may be referred to in the description of the corresponding respective partial embodiments, and will not be described herein.
In addition, since the dirty data generating device for the multifunctional electric meter communication protocol fuzz test of the embodiment is used for implementing the dirty data generating method for the multifunctional electric meter communication protocol fuzz test, the function of the dirty data generating device corresponds to that of the method, and details are not repeated here.
In addition, this application still provides dirty data generation equipment of many function electric meter communication protocol fuzzing, as shown in fig. 4, this equipment includes:
the memory 401: for storing a computer program;
the processor 402: the computer program is executed to implement the steps of the dirty data generation method for the multifunctional electric meter communication protocol fuzz test.
Finally, the present application also provides a computer readable storage medium, which stores a computer program, and the computer program when executed by a processor implements the steps of the dirty data generation method for the communication protocol fuzz test of a multifunctional electric meter.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The method, the device, the equipment and the computer readable storage medium for generating the dirty data of the multifunctional electric meter communication protocol fuzz test are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (7)
1. A dirty data generation method for a multifunctional ammeter communication protocol fuzzing test is characterized by comprising the following steps:
creating a strategy template in advance, wherein the strategy template is obtained by analyzing the multifunctional electric meter, and the strategy template specifically comprises the following steps:
determining a necessary strategy and an optional strategy by analyzing the session message and the communication reduction of the communication protocol of the multifunctional ammeter, wherein the necessary strategy comprises the following steps: the method comprises the following steps that communication addresses, wildcard characters or designated addresses, a data field length algorithm, start characters and end characters, a check bit algorithm, a data completion algorithm and a must-select strategy aiming at designated function codes of intelligent electric meters with special brands and models are adopted; the selectable policies include: the method comprises the steps of setting a random range of function codes, a random range of data identifiers, a random range of data fields, and considering whether correct codes are filled in code bits when detecting that the function codes such as data writing, password modification, demand zero clearing, ammeter zero clearing and electric quantity zero clearing appear according to the function codes of a data packet; wherein the data field refers to a sub-bit string corresponding to each data item in the bit string when the data element is composed of several data items;
creating a strategy template according to the necessary strategy and the optional strategy;
and calling the strategy template to generate an expected amount of pollution data in response to a generation instruction of the pollution data.
2. The method of claim 1, wherein the policy template is obtained by analyzing a session message and a DL/T645-2007 multifunctional meter communication protocol of the multifunctional meter.
3. The method according to any one of claims 1-2, wherein the pre-creating a policy template specifically comprises:
collecting conversation messages of multi-model multifunctional electric meters;
and creating a strategy template by analyzing the conversation message and the communication reduction of the communication protocol of the multifunctional ammeter.
4. The method of claim 3, wherein the creating a policy template by analyzing the session message and the communication reduction of the multifunctional meter communication protocol comprises:
judging whether the session message conforms to the communication protocol of the multifunctional ammeter;
and if not, generating a strategy template aiming at the model or the brand.
5. The utility model provides a dirty data generation device of multi-functional ammeter communication protocol fuzzing, its characterized in that includes:
a policy template creation module: the method is used for creating a strategy template in advance, wherein the strategy template is obtained by analyzing a session message and a multifunctional electric meter communication protocol of the multifunctional electric meter, and specifically comprises the following steps:
a policy determination unit: the method is used for determining a mandatory strategy and an optional strategy by analyzing the session message and the communication reduction of the multifunctional electric meter communication protocol, wherein the mandatory strategy comprises the following steps: the method comprises the following steps that communication addresses, wildcard characters or designated addresses, a data field length algorithm, start characters and end characters, a check bit algorithm, a data completion algorithm and a must-select strategy aiming at designated function codes of intelligent electric meters with special brands and models are adopted; the selectable policies include: the method comprises the steps of setting a random range of function codes, a random range of data identifiers, a random range of data fields, and considering whether correct codes are filled in code bits when detecting that the function codes such as data writing, password modification, demand zero clearing, ammeter zero clearing and electric quantity zero clearing appear according to the function codes of a data packet; wherein the data field refers to a sub-bit string corresponding to each data item in the bit string when the data element is composed of several data items;
a policy template creation unit: the strategy template is created according to the necessary strategy and the optional strategy;
dirty data generation module: and the strategy template is called to generate an expected amount of pollution data in response to the generation instruction of the pollution data.
6. The utility model provides a dirty data generation equipment of multi-functional ammeter communication protocol fuzzing, its characterized in that includes:
a memory: for storing a computer program;
a processor: the computer program is executed to implement the steps of the dirty data generating method for the multifunctional electric meter communication protocol fuzz test according to any one of claims 1 to 4.
7. A computer-readable storage medium, wherein the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of a multifunctional meter communication protocol fuzz testing dirty data generation method according to any one of claims 1-4.
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| CN111611174B (en) * | 2020-05-28 | 2023-08-11 | 北京火山引擎科技有限公司 | Method and device for constructing test data, computer equipment and storage medium |
| CN114205340B (en) * | 2021-12-23 | 2024-04-02 | 绿盟科技集团股份有限公司 | Fuzzy test method and device based on intelligent power equipment |
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| CN106326119A (en) * | 2016-08-19 | 2017-01-11 | 北京匡恩网络科技有限责任公司 | Method and device for generating test case |
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