Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/crypto/sha2/sha256c_arm64.c
39586 views
1
/*-

2
 * Copyright (c) 2021 The FreeBSD Foundation

3
 *

4
 * This software was developed by Andrew Turner under sponsorship from

5
 * the FreeBSD Foundation.

6
 *

7
 * Redistribution and use in source and binary forms, with or without

8
 * modification, are permitted provided that the following conditions

9
 * are met:

10
 * 1. Redistributions of source code must retain the above copyright

11
 *    notice, this list of conditions and the following disclaimer.

12
 * 2. Redistributions in binary form must reproduce the above copyright

13
 *    notice, this list of conditions and the following disclaimer in the

14
 *    documentation and/or other materials provided with the distribution.

15
 *

16
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

17
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

18
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

19
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

20
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

21
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

22
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

23
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

24
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

25
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

26
 * SUCH DAMAGE.

27
 */

28


29
#include <sys/types.h>

30


31
#include <arm_neon.h>

32


33
#include "sha256c_impl.h"

34


35
void __hidden

36
SHA256_Transform_arm64_impl(uint32_t * state, const unsigned char block[64],

37
    const uint32_t K[64])

38
{

39
	uint32x4_t W[4];

40
	uint32x4_t S[2];

41
	uint32x4_t S_start[2];

42
	uint32x4_t K_tmp, S_tmp;

43
	int i;

44


45
#define	A64_LOAD_W(x)							\

46
    W[x] = vld1q_u32((const uint32_t *)(&block[(x) * 16]));		\

47
    W[x] = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(W[x])))

48


49
	/* 1. Prepare the first part of the message schedule W. */

50
	A64_LOAD_W(0);

51
	A64_LOAD_W(1);

52
	A64_LOAD_W(2);

53
	A64_LOAD_W(3);

54


55
	/* 2. Initialize working variables. */

56
	S[0] = vld1q_u32(&state[0]);

57
	S[1] = vld1q_u32(&state[4]);

58


59
	S_start[0] = S[0];

60
	S_start[1] = S[1];

61


62
	/* 3. Mix. */

63
	for (i = 0; i < 64; i += 16) {

64
#define	A64_RNDr(i, ii)							\

65
    K_tmp = vaddq_u32(W[i], vld1q_u32(&K[ii + i * 4]));			\

66
    S_tmp = vsha256hq_u32(S[0], S[1], K_tmp);				\

67
    S[1] = vsha256h2q_u32(S[1], S[0], K_tmp);				\

68
    S[0] = S_tmp

69


70
		A64_RNDr(0, i);

71
		A64_RNDr(1, i);

72
		A64_RNDr(2, i);

73
		A64_RNDr(3, i);

74


75
		if (i == 48)

76
			break;

77


78
#define	A64_MSCH(x)							\

79
    W[x] = vsha256su0q_u32(W[x], W[(x + 1) % 4]);			\

80
    W[x] = vsha256su1q_u32(W[x], W[(x + 2) % 4], W[(x + 3) % 4])

81


82
		A64_MSCH(0);

83
		A64_MSCH(1);

84
		A64_MSCH(2);

85
		A64_MSCH(3);

86
	}

87


88
	/* 4. Mix local working variables into global state */

89
	S[0] = vaddq_u32(S[0], S_start[0]);

90
	S[1] = vaddq_u32(S[1], S_start[1]);

91


92
	vst1q_u32(&state[0], S[0]);

93
	vst1q_u32(&state[4], S[1]);

94
}

95


96