Device compatible with three SHA standards and realization method thereof
An implementation method and technology of SHA-512, applied in the field of comprehensive design, can solve the problems of increasing the cost of replacing equipment, hidden dangers of TPM chip security, etc.
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[0095] like figure 1 As shown, a device compatible with three SHA standards mainly includes a sequentially connected data filling module, Wt generation module and hash operation module.
[0096] The data filling module is used to receive plaintext data and generate filling data, and write the filling data of plaintext data to the Wt generation module;
[0097] The Wt generation module is used to receive the data output by the data filling module, connect each operand through exclusive OR operation in SHA-1 mode, and perform arithmetic addition operation on each operand in SHA-256 and SHA-512 mode Connect, generate a new Wt operator and input it to the hash operation module;
[0098] The hash operation module is used to receive the Wt operator of the Wt generation module, perform hash operation, and generate a 160-bit, 256-bit or 512-bit data summary.
[0099] like figure 2 As shown, the data filling module mainly includes a register, a subtractor and a multiplexer;
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