2 * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
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
10 /* This header can move into provider when legacy support is removed */
11 #ifndef OSSL_INTERNAL_SHA3_H
12 # define OSSL_INTERNAL_SHA3_H
15 # include <openssl/e_os2.h>
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
23 typedef struct keccak_st KECCAK1600_CTX;
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);
28 typedef struct prov_sha3_meth_st
30 sha3_absorb_fn *absorb;
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];
41 PROV_SHA3_METHOD meth;
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,
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);
51 size_t SHA3_absorb(uint64_t A[5][5], const unsigned char *inp, size_t len,
54 #endif /* OSSL_INTERNAL_SHA3_H */