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