SM4 acceleration method and device

Abstract

The embodiment of the invention relates to an SM4 acceleration method and device. The method comprises the following steps: adding an auxiliary register on the basis of an original internal register of a computing device, performing round key expansion calculation on an encryption key to generate a round key, and processing an input message by the round key; wherein at least one of round key expansion calculation and information input by processing the round key is realized through an expansion instruction; and storing the round key generated by calculation and the processing result into a preset register. By implementing the embodiment of the invention, the efficiency of SM4 operation is improved in a soft and hard combination manner, the cost is considered, and better configuration of resources is achieved.

Description

technical field [0001] Embodiments of the present invention relate to the field of computer technology, and in particular to an SM4 acceleration method and device. Background technique [0002] SM4 is a block cipher algorithm (GMT 0002-2012) issued by the State Cryptography Administration. The block length and key length of this algorithm are both 128 bits. Both the encryption algorithm and the key expansion algorithm adopt a 32-round nonlinear iterative structure. The algorithm structure of encryption and decryption is the same, but the order of using the round key is reversed, and the decryption round key is the reverse order of the encryption round key. For some computing devices, such as general-purpose processors, when using pure software to perform SM4 hash operations, there are often disadvantages of low efficiency and long-term occupation of the device, which leads to tight allocation of system resources and increased power consumption. For some hardware solutions,...

AI Technical Summary

Problems solved by technology

For some computing devices, such as general-purpose processors, when using pure software to perform SM4 hash operations, there are often disadvantages such as low efficiency and long-term occupation of the device, resulting in tight allocation of system resources and increased power consumption

And some hardware solutions, pure hardware realizes SM4 hash operation, which increases the hardware cost too much

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