1 /* SPDX-License-Identifier: Apache-2.0 OR BSD-
2 //
3 // This file is dual-licensed, meaning that yo
4 // choice of either of the following two licen
5 //
6 // Copyright 2023 The OpenSSL Project Authors.
7 //
8 // Licensed under the Apache License 2.0 (the
9 // a copy in the file LICENSE in the source di
10 // https://www.openssl.org/source/license.html
11 //
12 // or
13 //
14 // Copyright (c) 2023, Christoph Müllner <chri
15 // Copyright (c) 2023, Jerry Shih <jerry.shih@s
16 // Copyright 2024 Google LLC
17 // All rights reserved.
18 //
19 // Redistribution and use in source and binary
20 // modification, are permitted provided that t
21 // are met:
22 // 1. Redistributions of source code must reta
23 // notice, this list of conditions and the
24 // 2. Redistributions in binary form must repr
25 // notice, this list of conditions and the
26 // documentation and/or other materials pro
27 //
28 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
29 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTI
30 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCH
31 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
32 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIR
33 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGE
34 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 // THEORY OF LIABILITY, WHETHER IN CONTRACT, S
37 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
38 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE PO
39
40 // The generated code of this file depends on
41 // - RV64I
42 // - RISC-V Vector ('V') with VLEN >= 128
43 // - RISC-V Vector SM4 Block Cipher extension
44 // - RISC-V Vector Cryptography Bit-manipulati
45
46 #include <linux/linkage.h>
47
48 .text
49 .option arch, +zvksed, +zvkb
50
51 // void sm4_expandkey_zksed_zvkb(const u8 user
52 // u32 rkey_dec[
53 SYM_FUNC_START(sm4_expandkey_zvksed_zvkb)
54 vsetivli zero, 4, e32, m1, ta,
55
56 // Load the user key.
57 vle32.v v1, (a0)
58 vrev8.v v1, v1
59
60 // XOR the user key with the family ke
61 la t0, FAMILY_KEY
62 vle32.v v2, (t0)
63 vxor.vv v1, v1, v2
64
65 // Compute the round keys. Store them
66 // and in reverse order in rkey_dec.
67 addi a2, a2, 31*4
68 li t0, -4
69 .set i, 0
70 .rept 8
71 vsm4k.vi v1, v1, i
72 vse32.v v1, (a1) // Sto
73 vsse32.v v1, (a2), t0 // Sto
74 .if i < 7
75 addi a1, a1, 16
76 addi a2, a2, -16
77 .endif
78 .set i, i + 1
79 .endr
80
81 ret
82 SYM_FUNC_END(sm4_expandkey_zvksed_zvkb)
83
84 // void sm4_crypt_zvksed_zvkb(const u32 rkey[3
85 SYM_FUNC_START(sm4_crypt_zvksed_zvkb)
86 vsetivli zero, 4, e32, m1, ta,
87
88 // Load the input data.
89 vle32.v v1, (a1)
90 vrev8.v v1, v1
91
92 // Do the 32 rounds of SM4, 4 at a tim
93 .set i, 0
94 .rept 8
95 vle32.v v2, (a0)
96 vsm4r.vs v1, v2
97 .if i < 7
98 addi a0, a0, 16
99 .endif
100 .set i, i + 1
101 .endr
102
103 // Store the output data (in reverse e
104 vrev8.v v1, v1
105 li t0, -4
106 addi a2, a2, 12
107 vsse32.v v1, (a2), t0
108
109 ret
110 SYM_FUNC_END(sm4_crypt_zvksed_zvkb)
111
112 .section ".rodata"
113 .p2align 2
114 .type FAMILY_KEY, @object
115 FAMILY_KEY:
116 .word 0xA3B1BAC6, 0x56AA3350, 0x677D91
117 .size FAMILY_KEY, . - FAMILY_KEY
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