1 /* Copyright (c) 2021, Google Inc. 2 * 3 * Permission to use, copy, modify, and/or distribute this software for any 4 * purpose with or without fee is hereby granted, provided that the above 5 * copyright notice and this permission notice appear in all copies. 6 * 7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ 14 15 #ifndef OPENSSL_HEADER_BLAKE2_H 16 #define OPENSSL_HEADER_BLAKE2_H 17 18 #include <openssl/base.h> 19 20 #if defined(__cplusplus) 21 extern "C" { 22 #endif 23 24 25 #define BLAKE2B256_DIGEST_LENGTH (256 / 8) 26 #define BLAKE2B_CBLOCK 128 27 28 struct blake2b_state_st { 29 uint64_t h[8]; 30 uint64_t t_low, t_high; 31 union { 32 uint8_t bytes[BLAKE2B_CBLOCK]; 33 uint64_t words[16]; 34 } block; 35 size_t block_used; 36 }; 37 38 // BLAKE2B256_Init initialises |b2b| to perform a BLAKE2b-256 hash. There are no 39 // pointers inside |b2b| thus release of |b2b| is purely managed by the caller. 40 OPENSSL_EXPORT void BLAKE2B256_Init(BLAKE2B_CTX *b2b); 41 42 // BLAKE2B256_Update appends |len| bytes from |data| to the digest being 43 // calculated by |b2b|. 44 OPENSSL_EXPORT void BLAKE2B256_Update(BLAKE2B_CTX *b2b, const void *data, 45 size_t len); 46 47 // BLAKE2B256_Final completes the digest calculated by |b2b| and writes 48 // |BLAKE2B256_DIGEST_LENGTH| bytes to |out|. 49 OPENSSL_EXPORT void BLAKE2B256_Final(uint8_t out[BLAKE2B256_DIGEST_LENGTH], 50 BLAKE2B_CTX *b2b); 51 52 // BLAKE2B256 writes the BLAKE2b-256 digset of |len| bytes from |data| to 53 // |out|. 54 OPENSSL_EXPORT void BLAKE2B256(const uint8_t *data, size_t len, 55 uint8_t out[BLAKE2B256_DIGEST_LENGTH]); 56 57 58 #if defined(__cplusplus) 59 } // extern C 60 #endif 61 62 #endif // OPENSSL_HEADER_BLAKE2_H 63