Data calling method and device

Abstract

The embodiment of the invention discloses a data calling method and device. The difficulty of cracking a core dynamic link library can be improved. The method comprises the steps that a calling request for calling a target dynamic link library of a bar code identification device is received through a restricted interface; whether the calling request needs to be checked or not is judged on the basis of a random algorithm; when the calling request needs to be checked, an access key is acquired through a proxy function; the access key is decrypted by using a private key of a preset encryption algorithm to obtain a decryption result; the decryption result and the value of a random factor are checked so as to check whether the target dynamic link library called by the restricted interface is legal or not; when checking is successful, it is determined that the target dynamic link library is called through the restricted interface; on the basis of the proxy function, an index subscript of a target calling interface address of the target dynamic link library stored in a target hash table at the current moment is searched for; the target hash table is searched according to the index subscript so as to obtain the target dynamic link library.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a data calling method and a data calling device. Background technique [0002] In the context of today's information age, with the upgrading of domestic industries, many companies have begun to increase their R&D efforts. In this context, it is particularly important to have core technologies. [0003] In the barcode recognition industry, the core technology is the barcode recognition algorithm, and the mainstream of such algorithms is provided by dynamic link libraries. With the advancement of decompilation technology, such as the famous Interactive Disassembler Professional (Interactive Disassembler Professional, When upgrading and updating decompiled software such as IDA), when strengthening the dynamic link library, the focus is usually on encryption methods, device binding, etc. [0004] However, this approach will pay less attention to the impact of disassembly on the...

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Problems solved by technology

[0004] However, this approach will pay less attention to the impact of disassembly on the dynamic link library, making the call to the dynamic link library have certain security risks

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