关键词: 国密算法, Python, 性能优化, 密码算法库, 软件实现

Abstract: The known Python libraries of domestic cryptographic algorithms are not working efficiently. By comprehensively using performance optimization methods such as precompilation, calling mature cryptographic algorithm library, precomputation, parallel execution, constructing doublebyte Sbox, reducing function calls, avoiding intermediate type conversion and optimizing code details, a highefficiency Python toolkit containing four domestic cryptographic algorithms SM2, SM3, SM4 and ZUC is developed. All algorithms in this toolkit contain the accelerated versions suitable for efficient machine operation and the nonaccelerated versions suitable for teaching. And the gap of open source Python code of SM2 key exchange protocol is filled. The comparative test shows that, comparing with the best performance in the existing open source domestic cryptographic algorithm Python libraries, the performance of SM2 in this toolkit is about 10 times, the performances of SM3, SM4 and ZUC can reach more than 100 times, which are equivalent to the performances of the mature international cryptographic algorithm Python library.

Key words: domestic cryptographic algorithm, Python, performance optimization, cryptographic algorithm library, software implementation