/* SPDX-License-Identifier: Apache-2.0 OR BSD-2-Clause */
//
// This
file is dual-licensed, meaning that you can use it under your
// choice of either of the following two licenses:
//
// Copyright
2023 The OpenSSL Project Authors. All Rights Reserved.
//
// Licensed under the Apache License
2.
0 (the
"License"). You can obtain
// a copy in the
file LICENSE in the source distribution or at
//
https://www.openssl.org/source/license.html
//
// or
//
// Copyright (c)
2023, Christoph Müllner <christoph.muellner@vrull.eu>
// Copyright (c)
2023, Jerry Shih <jerry.shih@sifive.com>
// Copyright
2024 Google LLC
// 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.
//
// 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
// OWNER 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.
// The generated code of this
file depends on the following RISC-V extensions:
// - RV64I
// - RISC-V Vector (
'V') with VLEN >=
128
// - RISC-V Vector SM4 Block Cipher extension (
'Zvksed')
// - RISC-V Vector Cryptography Bit-manipulation extension (
'Zvkb')
#include <linux/linkage.h>
.text
.option arch, +zvksed, +zvkb
// void sm4_expandkey_zksed_zvkb(const u8 user_key[
16], u32 rkey_enc[
32],
// u32 rkey_dec[
32]);
SYM_FUNC_START(sm4_expandkey_zvksed_zvkb)
vsetivli zero,
4, e32, m1, ta, ma
// Load the user key.
vle32.v v1, (a0)
vrev8.v v1, v1
// XOR the user key with the family key.
la t0, FAMILY_KEY
vle32.v v2, (t0)
vxor.vv v1, v1, v2
// Compute the round keys. Store them in forwards order in rkey_enc
// and in reverse order in rkey_dec.
addi a2, a2,
31*
4
li t0, -
4
.
set i,
0
.rept
8
vsm4k.vi v1, v1, i
vse32.v v1, (a1) // Store to rkey_enc.
vsse32.v v1, (a2), t0 // Store to rkey_dec.
.if i <
7
addi a1, a1,
16
addi a2, a2, -
16
.endif
.
set i, i +
1
.endr
ret
SYM_FUNC_END(sm4_expandkey_zvksed_zvkb)
// void sm4_crypt_zvksed_zvkb(const u32 rkey[
32], const u8 in[
16], u8 out[
16]);
SYM_FUNC_START(sm4_crypt_zvksed_zvkb)
vsetivli zero,
4, e32, m1, ta, ma
// Load the input
data.
vle32.v v1, (a1)
vrev8.v v1, v1
// Do the
32 rounds of SM4,
4 at a time.
.
set i,
0
.rept
8
vle32.v v2, (a0)
vsm4r.vs v1, v2
.if i <
7
addi a0, a0,
16
.endif
.
set i, i +
1
.endr
// Store the output
data (in reverse element order).
vrev8.v v1, v1
li t0, -
4
addi a2, a2,
12
vsse32.v v1, (a2), t0
ret
SYM_FUNC_END(sm4_crypt_zvksed_zvkb)
.
section ".rodata"
.p2align
2
.type FAMILY_KEY, @object
FAMILY_KEY:
.
word 0xA3B1BAC6,
0x56AA3350,
0x677D9197,
0xB27022DC
.
size FAMILY_KEY, . - FAMILY_KEY