53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
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/*
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* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/* TODO(3.0) Move this header into provider when dependencies are removed */
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#ifndef HEADER_INTERNAL_SHA3_H
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# define HEADER_INTERNAL_SHA3_H
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# include <openssl/e_os2.h>
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# include <stddef.h>
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# define KECCAK1600_WIDTH 1600
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# define SHA3_MDSIZE(bitlen) (bitlen / 8)
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# define KMAC_MDSIZE(bitlen) 2 * (bitlen / 8)
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# define SHA3_BLOCKSIZE(bitlen) (KECCAK1600_WIDTH - bitlen * 2) / 8
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typedef struct keccak_st KECCAK1600_CTX;
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typedef size_t (sha3_absorb_fn)(void *vctx, const void *inp, size_t len);
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typedef int (sha3_final_fn)(unsigned char *md, void *vctx);
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typedef struct prov_sha3_meth_st
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{
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sha3_absorb_fn *absorb;
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sha3_final_fn *final;
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} PROV_SHA3_METHOD;
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struct keccak_st {
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uint64_t A[5][5];
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size_t block_size; /* cached ctx->digest->block_size */
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size_t md_size; /* output length, variable in XOF */
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size_t bufsz; /* used bytes in below buffer */
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unsigned char buf[KECCAK1600_WIDTH / 8 - 32];
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unsigned char pad;
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PROV_SHA3_METHOD meth;
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};
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void sha3_reset(KECCAK1600_CTX *ctx);
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int sha3_init(KECCAK1600_CTX *ctx, unsigned char pad, size_t bitlen);
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int keccak_kmac_init(KECCAK1600_CTX *ctx, unsigned char pad, size_t bitlen);
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int sha3_update(KECCAK1600_CTX *ctx, const void *_inp, size_t len);
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int sha3_final(unsigned char *md, KECCAK1600_CTX *ctx);
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size_t SHA3_absorb(uint64_t A[5][5], const unsigned char *inp, size_t len,
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size_t r);
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#endif /* HEADER_INTERNAL_SHA3_H */
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