1 /* 2 * This file is dual-licensed, meaning that you can use it under your 3 * choice of either of the following two licenses: 4 * 5 * Copyright 2023-2024 The OpenSSL Project Authors. All Rights Reserved. 6 * 7 * Licensed under the Apache License 2.0 (the "License"). You may not use 8 * this file except in compliance with the License. You can obtain a copy 9 * in the file LICENSE in the source distribution or at 10 * https://www.openssl.org/source/license.html 11 * 12 * or 13 * 14 * Copyright (c) 2023, Jerry Shih <jerry.shih@sifive.com> 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 27 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 28 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 29 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 30 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 31 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 32 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 36 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <openssl/opensslconf.h> 40 #include "crypto/chacha.h" 41 #include "crypto/riscv_arch.h" 42 43 void ChaCha20_ctr32_v_zbb_zvkb(unsigned char *out, const unsigned char *inp, 44 size_t len, const unsigned int key[8], 45 const unsigned int counter[4]); 46 47 void ChaCha20_ctr32_v_zbb(unsigned char *out, const unsigned char *inp, 48 size_t len, const unsigned int key[8], 49 const unsigned int counter[4]); 50 51 void ChaCha20_ctr32(unsigned char *out, const unsigned char *inp, size_t len, 52 const unsigned int key[8], const unsigned int counter[4]) 53 { 54 if (len > CHACHA_BLK_SIZE && RISCV_HAS_ZBB() && riscv_vlen() >= 128) { 55 if (RISCV_HAS_ZVKB()) { 56 ChaCha20_ctr32_v_zbb_zvkb(out, inp, len, key, counter); 57 } else { 58 ChaCha20_ctr32_v_zbb(out, inp, len, key, counter); 59 } 60 } else { 61 ChaCha20_ctr32_c(out, inp, len, key, counter); 62 } 63 } 64