Dynamic link library integrity measuring method under perlink mechanism

A dynamic link library and integrity measurement technology, applied in computer security devices, instruments, electrical digital data processing, etc., can solve problems such as reducing system and program startup time, and achieve the effect of not affecting system performance

Active Publication Date: 2015-07-01
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, this method effectively solves the defects of measurement methods in traditional Linux, and can pre-link while verifying the integrity of the Linux dynamic link library to reduce the startup time of the system and programs

Method used

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  • Dynamic link library integrity measuring method under perlink mechanism
  • Dynamic link library integrity measuring method under perlink mechanism

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention. The present invention is also applicable to other methods of integrity measurement, and is also applicable to other Linux terminals (including desktop computers and servers) Integrity measurement method in .

[0026] The construction of the measurement method of the present invention is divided into two modes: an integrity maintenance mode and an integrity verification mode. In integrity maintenance mode, file integrity verification is not performed when the system starts. This mode is mainly used to create or update configuration files and benchmark values ​​for files. In the inte...

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Abstract

The invention discloses a dynamic link library integrity measuring method under a perlink mechanism. The method comprises the steps that firstly, a Linux integrity measuring enabling switch is turned off, an integrity maintaining mode is achieved, and a file to be measured is extracted; secondly, whether the measured file belongs to a dynamic link library file or not is detected, and if yes, the displacement position and length of a code segment in the dynamic link library file in the file are extracted and sent to a measurement function, and the reference measurement value is calculated and stored; thirdly, an integrity verification mode is achieved, when a file loaded by the system is the file to be measured, whether the file belongs to the dynamic link library file or not is detected, if yes, the displacement position and length of a code segment in the dynamic link library file in the file are extracted and sent to the measurement function, the measurement value is calculated and compared with the reference measurement value, if the measurement value is matched with the reference measurement value, loading executing is allowed, and if the measurement value is not matched with the reference measurement value, loading executing is refused. The integrity measurement can be carried out on the dynamic link library file without closing a prelink tool.

Description

technical field [0001] The invention relates to the technical field of computer operating system integrity verification, in particular to a method for measuring the integrity of a dynamic link library based on a Linux system pre-link mechanism. Background technique [0002] With the popularity of computer applications, the integrity protection of computer systems has been paid more and more attention, and various integrity protection models and implementation methods have emerged. Most of them adopt the measurement method, that is, at some special moments, the target is measured, and some information of the target (usually the hash value of the file content) is obtained, and the value of this information is compared with the pre-recorded Compared with the standard value, it can be judged whether the integrity of the target is damaged. At present, in the Linux system, the method of protecting the integrity basically adopts the measurement method. For example, the IMA (Integ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/51
Inventor 涂碧波陈克李艳昭孟丹
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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