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/* $OpenBSD: sha512_amd64_generic.S,v 1.1 2024/11/16 14:56:39 jsing Exp $ */
/*
* Copyright (c) 2024 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef __CET__
#include <cet.h>
#else
#define _CET_ENDBR
#endif
#define ctx %rdi
#define in %rsi
#define num %rdx
#define round %rdi
#define hs0 %r8
#define hs1 %r9
#define hs2 %r10
#define hs3 %r11
#define hs4 %r12
#define hs5 %r13
#define hs6 %r14
#define hs7 %r15
#define k512 %rbp
#define tmp0 %rax
#define tmp1 %rbx
#define tmp2 %rcx
#define tmp3 %rdx
/*
* Load message into wt, storing a copy in the message schedule:
*
* Wt = Mt
*/
#define sha512_message_schedule_load(idx, m, w, wt) \
movq (m, round, 8), wt; \
bswapq wt; \
movq wt, ((idx&0xf)*8)(w);
/*
* Update message schedule and return current value in wt:
*
* Wt = sigma1(W(t-2)) + W(t-7) + sigma0(W(t-15)) + W(t-16)
*
* sigma0(x) = ror(x, 1) ^ ror(x, 8) ^ (x >> 7)
* sigma1(x) = ror(x, 19) ^ ror(x, 61) ^ (x >> 6)
*
*/
#define sha512_message_schedule_update(idx, w, wt) \
movq (((idx-2)&0xf)*8)(w), wt; /* sigma1 */ \
movq wt, tmp1; /* sigma1 */ \
rorq $(61-19), tmp1; /* sigma1 */ \
xorq wt, tmp1; /* sigma1 */ \
rorq $19, tmp1; /* sigma1 */ \
shrq $6, wt; /* sigma1 */ \
xorq tmp1, wt; /* sigma1 */ \
\
addq (((idx-7)&0xf)*8)(w), wt; /* Wt-7 */ \
addq (((idx-16)&0xf)*8)(w), wt; /* Wt-16 */ \
\
movq (((idx-15)&0xf)*8)(w), tmp2; /* sigma0 */ \
movq tmp2, tmp3; /* sigma0 */ \
rorq $(8-1), tmp2; /* sigma0 */ \
xorq tmp3, tmp2; /* sigma0 */ \
rorq $1, tmp2; /* sigma0 */ \
shrq $7, tmp3; /* sigma0 */ \
xorq tmp3, tmp2; /* sigma0 */ \
addq tmp2, wt; /* sigma0 */ \
\
movq wt, ((idx&0xf)*8)(w);
/*
* Compute a SHA-512 round:
*
* T1 = h + Sigma1(e) + Ch(e, f, g) + Kt + Wt
* T2 = Sigma0(a) + Maj(a, b, c)
*
* Sigma0(x) = ror(x, 28) ^ ror(x, 34) ^ ror(x, 39)
* Sigma1(x) = ror(x, 14) ^ ror(x, 18) ^ ror(x, 41)
* Ch(x, y, z) = (x & y) ^ (~x & z) = ((y ^ z) & x) ^ z
* Maj(x, y, z) = (x & y) ^ (x & z) ^ (y & z) = ((y ^ z) & x) ^ (y & z)
*
* Upon completion d = d + T1, h = T1 + T2, pending rotation.
*/
#define sha512_round(idx, a, b, c, d, e, f, g, h, k, w, wt) \
addq wt, h; /* T1 Wt */ \
addq (k512, round, 8), h; /* T1 Kt */ \
\
movq e, tmp1; /* T1 Sigma1 */ \
rorq $(41-18), tmp1; /* T1 Sigma1 */ \
xorq e, tmp1; /* T1 Sigma1 */ \
rorq $(18-14), tmp1; /* T1 Sigma1 */ \
xorq e, tmp1; /* T1 Sigma1 */ \
rorq $14, tmp1; /* T1 Sigma1 */ \
addq tmp1, h; /* T1 Sigma1 */ \
\
movq f, tmp2; /* T1 Ch */ \
xorq g, tmp2; /* T1 Ch */ \
andq e, tmp2; /* T1 Ch */ \
xorq g, tmp2; /* T1 Ch */ \
addq tmp2, h; /* T1 Ch */ \
\
addq h, d; /* d += T1 */ \
\
movq a, tmp1; /* T2 Sigma0 */ \
rorq $(39-34), tmp1; /* T2 Sigma0 */ \
xorq a, tmp1; /* T2 Sigma0 */ \
rorq $(34-28), tmp1; /* T2 Sigma0 */ \
xorq a, tmp1; /* T2 Sigma0 */ \
rorq $28, tmp1; /* T2 Sigma0 */ \
addq tmp1, h; /* T2 Sigma0 */ \
\
movq b, tmp2; /* T2 Maj */ \
xorq c, tmp2; /* T2 Maj */ \
andq a, tmp2; /* T2 Maj */ \
movq b, tmp3; /* T2 Maj */ \
andq c, tmp3; /* T2 Maj */ \
xorq tmp2, tmp3; /* T2 Maj */ \
addq tmp3, h; /* T2 Maj */ \
\
addq $1, round;
#define sha512_round_load(idx, a, b, c, d, e, f, g, h) \
sha512_message_schedule_load(idx, in, %rsp, tmp0) \
sha512_round(idx, a, b, c, d, e, f, g, h, k512, %rsp, tmp0)
#define sha512_round_update(idx, a, b, c, d, e, f, g, h) \
sha512_message_schedule_update(idx, %rsp, tmp0) \
sha512_round(idx, a, b, c, d, e, f, g, h, k512, %rsp, tmp0)
.text
/*
* void sha512_block_generic(SHA512_CTX *ctx, const void *in, size_t num);
*
* Standard x86-64 ABI: rdi = ctx, rsi = in, rdx = num
*/
.align 16
.globl sha512_block_generic
.type sha512_block_generic,@function
sha512_block_generic:
_CET_ENDBR
/* Save callee save registers. */
pushq %rbx
pushq %rbp
pushq %r12
pushq %r13
pushq %r14
pushq %r15
/* Allocate space for message schedule and context pointer. */
movq %rsp, %rax
subq $(128+3*8), %rsp
andq $~63, %rsp
movq %rax, (128+2*8)(%rsp)
movq ctx, (128+1*8)(%rsp)
/* Compute and store end of message. */
shlq $7, num
leaq (in, num, 1), %rbx
movq %rbx, (128+0*8)(%rsp)
/* Address of SHA-512 constants. */
leaq K512(%rip), k512
/* Load current hash state from context. */
movq (0*8)(ctx), hs0
movq (1*8)(ctx), hs1
movq (2*8)(ctx), hs2
movq (3*8)(ctx), hs3
movq (4*8)(ctx), hs4
movq (5*8)(ctx), hs5
movq (6*8)(ctx), hs6
movq (7*8)(ctx), hs7
jmp .Lblock_loop0
.align 16
.Lblock_loop0:
mov $0, round
/* Round 0 through 15. */
sha512_round_load(0, hs0, hs1, hs2, hs3, hs4, hs5, hs6, hs7)
sha512_round_load(1, hs7, hs0, hs1, hs2, hs3, hs4, hs5, hs6)
sha512_round_load(2, hs6, hs7, hs0, hs1, hs2, hs3, hs4, hs5)
sha512_round_load(3, hs5, hs6, hs7, hs0, hs1, hs2, hs3, hs4)
sha512_round_load(4, hs4, hs5, hs6, hs7, hs0, hs1, hs2, hs3)
sha512_round_load(5, hs3, hs4, hs5, hs6, hs7, hs0, hs1, hs2)
sha512_round_load(6, hs2, hs3, hs4, hs5, hs6, hs7, hs0, hs1)
sha512_round_load(7, hs1, hs2, hs3, hs4, hs5, hs6, hs7, hs0)
sha512_round_load(8, hs0, hs1, hs2, hs3, hs4, hs5, hs6, hs7)
sha512_round_load(9, hs7, hs0, hs1, hs2, hs3, hs4, hs5, hs6)
sha512_round_load(10, hs6, hs7, hs0, hs1, hs2, hs3, hs4, hs5)
sha512_round_load(11, hs5, hs6, hs7, hs0, hs1, hs2, hs3, hs4)
sha512_round_load(12, hs4, hs5, hs6, hs7, hs0, hs1, hs2, hs3)
sha512_round_load(13, hs3, hs4, hs5, hs6, hs7, hs0, hs1, hs2)
sha512_round_load(14, hs2, hs3, hs4, hs5, hs6, hs7, hs0, hs1)
sha512_round_load(15, hs1, hs2, hs3, hs4, hs5, hs6, hs7, hs0)
jmp .Lblock_loop16
.align 16
.Lblock_loop16:
/* Round 16 through 79. */
sha512_round_update(16, hs0, hs1, hs2, hs3, hs4, hs5, hs6, hs7)
sha512_round_update(17, hs7, hs0, hs1, hs2, hs3, hs4, hs5, hs6)
sha512_round_update(18, hs6, hs7, hs0, hs1, hs2, hs3, hs4, hs5)
sha512_round_update(19, hs5, hs6, hs7, hs0, hs1, hs2, hs3, hs4)
sha512_round_update(20, hs4, hs5, hs6, hs7, hs0, hs1, hs2, hs3)
sha512_round_update(21, hs3, hs4, hs5, hs6, hs7, hs0, hs1, hs2)
sha512_round_update(22, hs2, hs3, hs4, hs5, hs6, hs7, hs0, hs1)
sha512_round_update(23, hs1, hs2, hs3, hs4, hs5, hs6, hs7, hs0)
sha512_round_update(24, hs0, hs1, hs2, hs3, hs4, hs5, hs6, hs7)
sha512_round_update(25, hs7, hs0, hs1, hs2, hs3, hs4, hs5, hs6)
sha512_round_update(26, hs6, hs7, hs0, hs1, hs2, hs3, hs4, hs5)
sha512_round_update(27, hs5, hs6, hs7, hs0, hs1, hs2, hs3, hs4)
sha512_round_update(28, hs4, hs5, hs6, hs7, hs0, hs1, hs2, hs3)
sha512_round_update(29, hs3, hs4, hs5, hs6, hs7, hs0, hs1, hs2)
sha512_round_update(30, hs2, hs3, hs4, hs5, hs6, hs7, hs0, hs1)
sha512_round_update(31, hs1, hs2, hs3, hs4, hs5, hs6, hs7, hs0)
cmp $80, round
jb .Lblock_loop16
movq (128+1*8)(%rsp), ctx
/* Add intermediate state to hash state. */
addq (0*8)(ctx), hs0
addq (1*8)(ctx), hs1
addq (2*8)(ctx), hs2
addq (3*8)(ctx), hs3
addq (4*8)(ctx), hs4
addq (5*8)(ctx), hs5
addq (6*8)(ctx), hs6
addq (7*8)(ctx), hs7
/* Store new hash state to context. */
movq hs0, (0*8)(ctx)
movq hs1, (1*8)(ctx)
movq hs2, (2*8)(ctx)
movq hs3, (3*8)(ctx)
movq hs4, (4*8)(ctx)
movq hs5, (5*8)(ctx)
movq hs6, (6*8)(ctx)
movq hs7, (7*8)(ctx)
addq $128, in
cmpq (128+0*8)(%rsp), in
jb .Lblock_loop0
movq (128+2*8)(%rsp), %rsp
/* Restore callee save registers. */
popq %r15
popq %r14
popq %r13
popq %r12
popq %rbp
popq %rbx
ret
/*
* SHA-512 constants - see FIPS 180-4 section 4.2.3.
*/
.rodata
.align 64
.type K512,@object
K512:
.quad 0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc
.quad 0x3956c25bf348b538, 0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118
.quad 0xd807aa98a3030242, 0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2
.quad 0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235, 0xc19bf174cf692694
.quad 0xe49b69c19ef14ad2, 0xefbe4786384f25e3, 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65
.quad 0x2de92c6f592b0275, 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5
.quad 0x983e5152ee66dfab, 0xa831c66d2db43210, 0xb00327c898fb213f, 0xbf597fc7beef0ee4
.quad 0xc6e00bf33da88fc2, 0xd5a79147930aa725, 0x06ca6351e003826f, 0x142929670a0e6e70
.quad 0x27b70a8546d22ffc, 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df
.quad 0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, 0x92722c851482353b
.quad 0xa2bfe8a14cf10364, 0xa81a664bbc423001, 0xc24b8b70d0f89791, 0xc76c51a30654be30
.quad 0xd192e819d6ef5218, 0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8
.quad 0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8
.quad 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3
.quad 0x748f82ee5defb2fc, 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec
.quad 0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, 0xc67178f2e372532b
.quad 0xca273eceea26619c, 0xd186b8c721c0c207, 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178
.quad 0x06f067aa72176fba, 0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b
.quad 0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, 0x431d67c49c100d4c
.quad 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, 0x5fcb6fab3ad6faec, 0x6c44198c4a475817
.size K512,.-K512
|
