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
ChaCha20_ctr32(unsigned char * out,const unsigned char * inp,size_t len,const unsigned int key[8],const unsigned int counter[4])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
