Signature method, device and equipment of disk image file in Android system

Abstract

The invention relates to a method and a device for signature of disk mirror image files in an Android system, and an equipment. The method comprises steps that a signature algorithm is acquired according to a first public key in a hard disk; the signature algorithm comprises an abstract algorithm and an encryption algorithm; an abstract of a to-be-signed disk mirror image file is calculated according to the abstract algorithm, the abstract is sent to a hardware encryption machine, and the hardware encryption machine is enabled to employ a first private key stored in the inner portion of the hardware encryption machine to calculate a signature value of the disk mirror image file; the first private key corresponds to the first public key; the signature value sent by the hardware encryption machine is received, and the signature value is added to a tail end of the disk mirror image file. Through the method, the generation process of the signature value of the disk mirror image file is realized in the hardware encryption machine, the private key is stored in the hardware encryption machine, and thereby the signature process is quite rapid and safe.

Description

technical field [0001] The present disclosure relates to computer technology, and in particular to a method, device and equipment for signing a disk image file in an Android system. Background technique [0002] The Android system is a free and open-source operating system based on Linux, which is mainly used in mobile devices, such as smart phones or tablet computers. The Android system includes many projects, and these projects are compiled together to obtain a complete package, which is called a read-only memory image (Read Only Memory image, referred to as ROM) package; the ROM package contains many disk image files. Among them, boot.img and recovery.img are two disk image files in the ROM package. In order to prevent these two files from being tampered with, it is necessary to increase the signature verification of these two disk image files. [0003] In the related technology, the public key and the private key are generated in advance, and the public key and the priv...

AI Technical Summary

Problems solved by technology

[0003] In the related technology, the public key and the private key are generated in advance, and the public key and the private key are converted into corresponding formats and stored on the hard disk, so as to sign the disk image file according to the public key and the private key; it can be seen that the private key is stored in On the hard disk, there is a risk of leakage

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