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Embedded linux device image file verification method

An embedded device and image file technology, applied in the direction of digital data protection, etc., can solve the problems of inflexible verification methods and inconvenient real-time verification for users, and achieve the effect of improving the inability to calculate and verify image files in real time

Inactive Publication Date: 2017-12-29
KUNDA COMP TECHKUSN +1
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Problems solved by technology

And generally want to confirm the image file that burns in described storage device, can only confirm the checksum of this image file before burning in, or the checksum of known this image file is filled somewhere in advance, through comparison If it matches, it will display the previously filled checksum, and if it does not match, it will display a fixed error message
It can be seen that the existing image file verification method is relatively inflexible and needs to be prepared in advance, which is inconvenient for users to verify instantly

Method used

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  • Embedded linux device image file verification method

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Embodiment Construction

[0018] see figure 1 Shown, a kind of Embedded Linux device image file verification method of the present invention, after obtaining an image file to be verified and the original data of the image file to be verified, comprises the following steps:

[0019] Step 101: Calculate the file frame size required for the original data of the image file to be verified to be completely covered, the file frame is constructed from data blocks (block size) of a specific size, and the size of each data block can be It is 512bytes or 256bytes.

[0020] Step 102: Calculate the difference between the size of the file frame and the size of the original data of the image file to be verified to obtain the size of the unoccupied space in the file frame by the original data of the image file to be verified.

[0021] Step 103: Fill the unoccupied space in the file frame with 0s to complete, so that the size of the original data after filling with 0s is the same as the size of the file frame, and cal...

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Abstract

The invention provides a method of verifying image files of embedded Linux equipment. The method includes the steps of a, calculating the size of a file frame required for fully covering original data of an image file to be verified; b, acquiring the size of the space, not occupied by original data of the image file to be verified, of the file frame; c, filling the unoccupied space of the file frame through 0, and calculating a checksum of the original data of the image file after the inside of the file frame is filled with 0; d, extracting the image file to be extracted, from a storage device of the Linux equipment, and calculating a checksum of the image file; e, judging whether or not the checksum of the original data of the image file obtained after the inside of the file frame is filled with 0 is equal to the checksum of the image file in the storage device, by comparison; if yes, executing the step f; if not, executing the step g; f, sending out a correctness reminder message; and g, sending an error reminder message. The image files can be verified in real time by the method.

Description

【Technical field】 [0001] The invention relates to a method for verifying an image file of an embedded Linux device. 【Background technique】 [0002] For embedded Linux devices, usually when we want to know the system information, verify whether the factory or self-burning is correct, or the system has a BUG, ​​we will want to confirm the storage device (flash or SD / SMMC) of the embedded Linux device. Image file (image) version and checksum (checksum). And generally want to confirm the image file that burns in described storage device, can only confirm the checksum of this image file before burning in, or the checksum of known this image file is filled somewhere in advance, through comparison If it matches, it will display the previously filled checksum, and if it does not match, it will display a fixed error message. It can be seen that the verification method of the existing image file is relatively inflexible and needs to be prepared in advance, which is inconvenient for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/64
CPCG06F21/64
Inventor 蔡政育
Owner KUNDA COMP TECHKUSN
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