/* * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ /* This header can move into provider when legacy support is removed */ #ifndef OSSL_INTERNAL_SHA3_H # define OSSL_INTERNAL_SHA3_H # pragma once # include <openssl/e_os2.h> # include <stddef.h> # define KECCAK1600_WIDTH 1600 # define SHA3_MDSIZE(bitlen) (bitlen / 8) # define KMAC_MDSIZE(bitlen) 2 * (bitlen / 8) # define SHA3_BLOCKSIZE(bitlen) (KECCAK1600_WIDTH - bitlen * 2) / 8 typedef struct keccak_st KECCAK1600_CTX; typedef size_t (sha3_absorb_fn)(void *vctx, const void *inp, size_t len); typedef int (sha3_final_fn)(unsigned char *md, void *vctx); typedef struct prov_sha3_meth_st { sha3_absorb_fn *absorb; sha3_final_fn *final; } PROV_SHA3_METHOD; struct keccak_st { uint64_t A[5][5]; size_t block_size; /* cached ctx->digest->block_size */ size_t md_size; /* output length, variable in XOF */ size_t bufsz; /* used bytes in below buffer */ unsigned char buf[KECCAK1600_WIDTH / 8 - 32]; unsigned char pad; PROV_SHA3_METHOD meth; }; void ossl_sha3_reset(KECCAK1600_CTX *ctx); int ossl_sha3_init(KECCAK1600_CTX *ctx, unsigned char pad, size_t bitlen); int ossl_keccak_kmac_init(KECCAK1600_CTX *ctx, unsigned char pad, size_t bitlen); int ossl_sha3_update(KECCAK1600_CTX *ctx, const void *_inp, size_t len); int ossl_sha3_final(unsigned char *md, KECCAK1600_CTX *ctx); size_t SHA3_absorb(uint64_t A[5][5], const unsigned char *inp, size_t len, size_t r); #endif /* OSSL_INTERNAL_SHA3_H */