1 /* 2 * Copyright (c) 2014 Vincent Hanquez <vincent@snarc.org> 3 * 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the author nor the names of his contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 #ifndef CRYPTONITE_SALSA 31 #define CRYPTONITE_SALSA 32 33 typedef union { 34 uint64_t q[8]; 35 uint32_t d[16]; 36 uint8_t b[64]; 37 } block; 38 39 typedef block cryptonite_salsa_state; 40 41 typedef struct { 42 cryptonite_salsa_state st; 43 uint8_t prev[64]; 44 uint8_t prev_ofs; 45 uint8_t prev_len; 46 uint8_t nb_rounds; 47 } cryptonite_salsa_context; 48 49 /* for scrypt */ 50 void cryptonite_salsa_core_xor(int rounds, block *out, block *in); 51 52 void cryptonite_salsa_init_core(cryptonite_salsa_state *st, uint32_t keylen, const uint8_t *key, uint32_t ivlen, const uint8_t *iv); 53 void cryptonite_salsa_init(cryptonite_salsa_context *ctx, uint8_t nb_rounds, uint32_t keylen, const uint8_t *key, uint32_t ivlen, const uint8_t *iv); 54 void cryptonite_salsa_combine(uint8_t *dst, cryptonite_salsa_context *st, const uint8_t *src, uint32_t bytes); 55 void cryptonite_salsa_generate(uint8_t *dst, cryptonite_salsa_context *st, uint32_t bytes); 56 57 #endif 58