crypto/chacha/chacha_riscv.c

   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 2023-2023 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_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(unsigned char *out, const unsigned char *inp, size_t len,
  48                     const unsigned int key[8], const unsigned int counter[4])
  49 {
  50     if (len > CHACHA_BLK_SIZE && RISCV_HAS_ZVKB() && RISCV_HAS_ZBB() &&
  51         riscv_vlen() >= 128) {
  52         ChaCha20_ctr32_zbb_zvkb(out, inp, len, key, counter);
  53     } else {
  54         ChaCha20_ctr32_c(out, inp, len, key, counter);
  55     }
  56 }