Ivan Grokhotkov
3b3802923e
Co-authored-by: Maksim Naumenko <maksim.naumenko@espressif.com> Co-authored-by: Harshal Patil <harshal.patil@espressif.com>
42 lines
976 B
C
42 lines
976 B
C
/*
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* SHA-512/t emulation for ESP32 series
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*
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* Copyright (c) 2024 Espressif Systems (Shanghai) Co. Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 or
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* (at your option) any later version.
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*/
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#include "sha512_t_i.h"
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#define CONST64(n) n ## ULL
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void sha512_t_init_message(uint32_t *buffer, size_t buf_len, uint32_t t, uint32_t t_len)
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{
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/*
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* hex representation of "SHA-512/t"
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*/
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buffer[0] = 0x2D414853UL; // SHA-
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buffer[1] = 0x2F323135UL; // 512/
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buffer[2] = t; // t
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for (int i = 3; i < buf_len; i++) {
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buffer[i] = 0; // padding
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}
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buffer[buf_len - 1] = t_len; // length of message (SHA-512/t)
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}
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/*
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* Initialize the hash state
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*/
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void sha512_t_init(struct sha512_state *md)
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{
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sha512_init(md);
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for (int i = 0; i < 8; i++) {
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md->state[i] ^= CONST64(0xa5a5a5a5a5a5a5a5);
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}
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}
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