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/* Copyright (c) 2021, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#ifndef OPENSSL_HEADER_BLAKE2_H
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#define OPENSSL_HEADER_BLAKE2_H
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#include <openssl/base.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#define BLAKE2B256_DIGEST_LENGTH (256 / 8)
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#define BLAKE2B_CBLOCK 128
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struct blake2b_state_st {
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uint64_t h[8];
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uint64_t t_low, t_high;
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uint8_t block[BLAKE2B_CBLOCK];
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size_t block_used;
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};
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// BLAKE2B256_Init initialises |b2b| to perform a BLAKE2b-256 hash. There are no
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// pointers inside |b2b| thus release of |b2b| is purely managed by the caller.
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OPENSSL_EXPORT void BLAKE2B256_Init(BLAKE2B_CTX *b2b);
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// BLAKE2B256_Update appends |len| bytes from |data| to the digest being
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// calculated by |b2b|.
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OPENSSL_EXPORT void BLAKE2B256_Update(BLAKE2B_CTX *b2b, const void *data,
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size_t len);
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// BLAKE2B256_Final completes the digest calculated by |b2b| and writes
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// |BLAKE2B256_DIGEST_LENGTH| bytes to |out|.
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OPENSSL_EXPORT void BLAKE2B256_Final(uint8_t out[BLAKE2B256_DIGEST_LENGTH],
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BLAKE2B_CTX *b2b);
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// BLAKE2B256 writes the BLAKE2b-256 digset of |len| bytes from |data| to
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// |out|.
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OPENSSL_EXPORT void BLAKE2B256(const uint8_t *data, size_t len,
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uint8_t out[BLAKE2B256_DIGEST_LENGTH]);
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#if defined(__cplusplus)
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} // extern C
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#endif
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#endif // OPENSSL_HEADER_BLAKE2_H
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