1*b0d17251Schristos /* 2*b0d17251Schristos * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved. 3*b0d17251Schristos * 4*b0d17251Schristos * Licensed under the Apache License 2.0 (the "License"). You may not use 5*b0d17251Schristos * this file except in compliance with the License. You can obtain a copy 6*b0d17251Schristos * in the file LICENSE in the source distribution or at 7*b0d17251Schristos * https://www.openssl.org/source/license.html 8*b0d17251Schristos */ 9*b0d17251Schristos 10*b0d17251Schristos /* This header can move into provider when legacy support is removed */ 11*b0d17251Schristos #ifndef OSSL_INTERNAL_SHA3_H 12*b0d17251Schristos # define OSSL_INTERNAL_SHA3_H 13*b0d17251Schristos # pragma once 14*b0d17251Schristos 15*b0d17251Schristos # include <openssl/e_os2.h> 16*b0d17251Schristos # include <stddef.h> 17*b0d17251Schristos 18*b0d17251Schristos # define KECCAK1600_WIDTH 1600 19*b0d17251Schristos # define SHA3_MDSIZE(bitlen) (bitlen / 8) 20*b0d17251Schristos # define KMAC_MDSIZE(bitlen) 2 * (bitlen / 8) 21*b0d17251Schristos # define SHA3_BLOCKSIZE(bitlen) (KECCAK1600_WIDTH - bitlen * 2) / 8 22*b0d17251Schristos 23*b0d17251Schristos typedef struct keccak_st KECCAK1600_CTX; 24*b0d17251Schristos 25*b0d17251Schristos typedef size_t (sha3_absorb_fn)(void *vctx, const void *inp, size_t len); 26*b0d17251Schristos typedef int (sha3_final_fn)(unsigned char *md, void *vctx); 27*b0d17251Schristos 28*b0d17251Schristos typedef struct prov_sha3_meth_st 29*b0d17251Schristos { 30*b0d17251Schristos sha3_absorb_fn *absorb; 31*b0d17251Schristos sha3_final_fn *final; 32*b0d17251Schristos } PROV_SHA3_METHOD; 33*b0d17251Schristos 34*b0d17251Schristos struct keccak_st { 35*b0d17251Schristos uint64_t A[5][5]; 36*b0d17251Schristos size_t block_size; /* cached ctx->digest->block_size */ 37*b0d17251Schristos size_t md_size; /* output length, variable in XOF */ 38*b0d17251Schristos size_t bufsz; /* used bytes in below buffer */ 39*b0d17251Schristos unsigned char buf[KECCAK1600_WIDTH / 8 - 32]; 40*b0d17251Schristos unsigned char pad; 41*b0d17251Schristos PROV_SHA3_METHOD meth; 42*b0d17251Schristos }; 43*b0d17251Schristos 44*b0d17251Schristos void ossl_sha3_reset(KECCAK1600_CTX *ctx); 45*b0d17251Schristos int ossl_sha3_init(KECCAK1600_CTX *ctx, unsigned char pad, size_t bitlen); 46*b0d17251Schristos int ossl_keccak_kmac_init(KECCAK1600_CTX *ctx, unsigned char pad, 47*b0d17251Schristos size_t bitlen); 48*b0d17251Schristos int ossl_sha3_update(KECCAK1600_CTX *ctx, const void *_inp, size_t len); 49*b0d17251Schristos int ossl_sha3_final(unsigned char *md, KECCAK1600_CTX *ctx); 50*b0d17251Schristos 51*b0d17251Schristos size_t SHA3_absorb(uint64_t A[5][5], const unsigned char *inp, size_t len, 52*b0d17251Schristos size_t r); 53*b0d17251Schristos 54*b0d17251Schristos #endif /* OSSL_INTERNAL_SHA3_H */ 55