// Copyright (c) 2014-2023, The Monero Project // // All rights reserved. // // Redistribution and use in source and binary forms, with or without modification, are // permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright notice, this list of // conditions and the following disclaimer. // // 2. Redistributions in binary form must reproduce the above copyright notice, this list // of conditions and the following disclaimer in the documentation and/or other // materials provided with the distribution. // // 3. Neither the name of the copyright holder nor the names of its contributors may be // used to endorse or promote products derived from this software without specific // prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #ifndef HMAC_KECCAK_H #define HMAC_KECCAK_H #include "keccak.h" // HMAC RFC 2104 with Keccak-256 base hash function // // B = KECCAK_BLOCKLEN = 136 B // L = HASH_SIZE = 32 B // // Note this is not HMAC-SHA3 as SHA3 and Keccak differs in // the padding constant. #ifdef __cplusplus extern "C" { #endif typedef struct { KECCAK_CTX inner; KECCAK_CTX outer; } hmac_keccak_state; void hmac_keccak_init(hmac_keccak_state *S, const uint8_t *_key, size_t keylen); void hmac_keccak_update(hmac_keccak_state *S, const uint8_t *data, size_t datalen); void hmac_keccak_finish(hmac_keccak_state *S, uint8_t *digest); void hmac_keccak_hash(uint8_t *out, const uint8_t *key, size_t keylen, const uint8_t *in, size_t inlen); #ifdef __cplusplus } #endif #endif //HMAC_KECCAK_H