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crypto: x86/poly1305 - wire up faster implementations for kernel
These x86_64 vectorized implementations support AVX, AVX-2, and AVX512F.
The AVX-512F implementation is disabled on Skylake, due to throttling,
but it is quite fast on >= Cannonlake.
On the left is cycle counts on a Core i7 6700HQ using the AVX-2
codepath, comparing this implementation ("new") to the implementation in
the current crypto api ("old"). On the right are benchmarks on a Xeon
Gold 5120 using the AVX-512 codepath. The new implementation is faster
on all benchmarks.
AVX-2 AVX-512
--------- -----------
size old new size old new
---- ---- ---- ---- ---- ----
0 70 68 0 74 70
16 92 90 16 96 92
32 134 104 32 136 106
48 172 120 48 184 124
64 218 136 64 218 138
80 254 158 80 260 160
96 298 174 96 300 176
112 342 192 112 342 194
128 388 212 128 384 212
144 428 228 144 420 226
160 466 246 160 464 248
176 510 264 176 504 264
192 550 282 192 544 282
208 594 302 208 582 300
224 628 316 224 624 318
240 676 334 240 662 338
256 716 354 256 708 358
272 764 374 272 748 372
288 802 352 288 788 358
304 420 366 304 422 370
320 428 360 320 432 364
336 484 378 336 486 380
352 426 384 352 434 390
368 478 400 368 480 408
384 488 394 384 490 398
400 542 408 400 542 412
416 486 416 416 492 426
432 534 430 432 538 436
448 544 422 448 546 432
464 600 438 464 600 448
480 540 448 480 548 456
496 594 464 496 594 476
512 602 456 512 606 470
528 656 476 528 656 480
544 600 480 544 606 498
560 650 494 560 652 512
576 664 490 576 662 508
592 714 508 592 716 522
608 656 514 608 664 538
624 708 532 624 710 552
640 716 524 640 720 516
656 770 536 656 772 526
672 716 548 672 722 544
688 770 562 688 768 556
704 774 552 704 778 556
720 826 568 720 832 568
736 768 574 736 780 584
752 822 592 752 826 600
768 830 584 768 836 560
784 884 602 784 888 572
800 828 610 800 838 588
816 884 628 816 884 604
832 888 618 832 894 598
848 942 632 848 946 612
864 884 644 864 896 628
880 936 660 880 942 644
896 948 652 896 952 608
912 1000 664 912 1004 616
928 942 676 928 954 634
944 994 690 944 1000 646
960 1002 680 960 1008 646
976 1054 694 976 1062 658
992 1002 706 992 1012 674
1008 1052 720 1008 1058 690
This commit wires in the prior implementation from Andy, and makes the
following changes to be suitable for kernel land.
- Some cosmetic and structural changes, like renaming labels to
.Lname, constants, and other Linux conventions, as well as making
the code easy for us to maintain moving forward.
- CPU feature checking is done in C by the glue code.
- We avoid jumping into the middle of functions, to appease objtool,
and instead parameterize shared code.
- We maintain frame pointers so that stack traces make sense.
- We remove the dependency on the perl xlate code, which transforms
the output into things that assemblers we don't care about use.
Importantly, none of our changes affect the arithmetic or core code, but
just involve the differing environment of kernel space.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Samuel Neves <sneves@dei.uc.pt>
Co-developed-by: Samuel Neves <sneves@dei.uc.pt>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jason A. Donenfeld
Herbert Xu
parent
0896ca2a0c
commit
d7d7b85356
1
arch/x86/crypto/.gitignore
vendored
Normal file
1
arch/x86/crypto/.gitignore
vendored
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@ -0,0 +1 @@
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poly1305-x86_64.S
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@ -73,6 +73,10 @@ aegis128-aesni-y := aegis128-aesni-asm.o aegis128-aesni-glue.o
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nhpoly1305-sse2-y := nh-sse2-x86_64.o nhpoly1305-sse2-glue.o
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blake2s-x86_64-y := blake2s-core.o blake2s-glue.o
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poly1305-x86_64-y := poly1305-x86_64-cryptogams.o poly1305_glue.o
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ifneq ($(CONFIG_CRYPTO_POLY1305_X86_64),)
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targets += poly1305-x86_64-cryptogams.S
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endif
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ifeq ($(avx_supported),yes)
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camellia-aesni-avx-x86_64-y := camellia-aesni-avx-asm_64.o \
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@ -101,10 +105,8 @@ aesni-intel-y := aesni-intel_asm.o aesni-intel_glue.o
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aesni-intel-$(CONFIG_64BIT) += aesni-intel_avx-x86_64.o aes_ctrby8_avx-x86_64.o
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ghash-clmulni-intel-y := ghash-clmulni-intel_asm.o ghash-clmulni-intel_glue.o
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sha1-ssse3-y := sha1_ssse3_asm.o sha1_ssse3_glue.o
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poly1305-x86_64-y := poly1305-sse2-x86_64.o poly1305_glue.o
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ifeq ($(avx2_supported),yes)
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sha1-ssse3-y += sha1_avx2_x86_64_asm.o
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poly1305-x86_64-y += poly1305-avx2-x86_64.o
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endif
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ifeq ($(sha1_ni_supported),yes)
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sha1-ssse3-y += sha1_ni_asm.o
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@ -118,3 +120,8 @@ sha256-ssse3-y += sha256_ni_asm.o
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endif
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sha512-ssse3-y := sha512-ssse3-asm.o sha512-avx-asm.o sha512-avx2-asm.o sha512_ssse3_glue.o
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crct10dif-pclmul-y := crct10dif-pcl-asm_64.o crct10dif-pclmul_glue.o
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quiet_cmd_perlasm = PERLASM $@
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cmd_perlasm = $(PERL) $< > $@
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$(obj)/%.S: $(src)/%.pl FORCE
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$(call if_changed,perlasm)
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@ -1,390 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Poly1305 authenticator algorithm, RFC7539, x64 AVX2 functions
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*
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* Copyright (C) 2015 Martin Willi
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*/
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#include <linux/linkage.h>
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.section .rodata.cst32.ANMASK, "aM", @progbits, 32
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.align 32
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ANMASK: .octa 0x0000000003ffffff0000000003ffffff
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.octa 0x0000000003ffffff0000000003ffffff
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.section .rodata.cst32.ORMASK, "aM", @progbits, 32
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.align 32
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ORMASK: .octa 0x00000000010000000000000001000000
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.octa 0x00000000010000000000000001000000
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.text
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#define h0 0x00(%rdi)
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#define h1 0x04(%rdi)
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#define h2 0x08(%rdi)
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#define h3 0x0c(%rdi)
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#define h4 0x10(%rdi)
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#define r0 0x00(%rdx)
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#define r1 0x04(%rdx)
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#define r2 0x08(%rdx)
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#define r3 0x0c(%rdx)
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#define r4 0x10(%rdx)
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#define u0 0x00(%r8)
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#define u1 0x04(%r8)
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#define u2 0x08(%r8)
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#define u3 0x0c(%r8)
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#define u4 0x10(%r8)
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#define w0 0x18(%r8)
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#define w1 0x1c(%r8)
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#define w2 0x20(%r8)
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#define w3 0x24(%r8)
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#define w4 0x28(%r8)
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#define y0 0x30(%r8)
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#define y1 0x34(%r8)
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#define y2 0x38(%r8)
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#define y3 0x3c(%r8)
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#define y4 0x40(%r8)
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#define m %rsi
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#define hc0 %ymm0
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#define hc1 %ymm1
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#define hc2 %ymm2
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#define hc3 %ymm3
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#define hc4 %ymm4
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#define hc0x %xmm0
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#define hc1x %xmm1
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#define hc2x %xmm2
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#define hc3x %xmm3
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#define hc4x %xmm4
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#define t1 %ymm5
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#define t2 %ymm6
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#define t1x %xmm5
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#define t2x %xmm6
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#define ruwy0 %ymm7
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#define ruwy1 %ymm8
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#define ruwy2 %ymm9
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#define ruwy3 %ymm10
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#define ruwy4 %ymm11
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#define ruwy0x %xmm7
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#define ruwy1x %xmm8
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#define ruwy2x %xmm9
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#define ruwy3x %xmm10
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#define ruwy4x %xmm11
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#define svxz1 %ymm12
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#define svxz2 %ymm13
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#define svxz3 %ymm14
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#define svxz4 %ymm15
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#define d0 %r9
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#define d1 %r10
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#define d2 %r11
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#define d3 %r12
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#define d4 %r13
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SYM_FUNC_START(poly1305_4block_avx2)
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# %rdi: Accumulator h[5]
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# %rsi: 64 byte input block m
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# %rdx: Poly1305 key r[5]
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# %rcx: Quadblock count
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# %r8: Poly1305 derived key r^2 u[5], r^3 w[5], r^4 y[5],
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# This four-block variant uses loop unrolled block processing. It
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# requires 4 Poly1305 keys: r, r^2, r^3 and r^4:
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# h = (h + m) * r => h = (h + m1) * r^4 + m2 * r^3 + m3 * r^2 + m4 * r
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vzeroupper
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push %rbx
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push %r12
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push %r13
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# combine r0,u0,w0,y0
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vmovd y0,ruwy0x
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vmovd w0,t1x
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vpunpcklqdq t1,ruwy0,ruwy0
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vmovd u0,t1x
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vmovd r0,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy0,ruwy0
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# combine r1,u1,w1,y1 and s1=r1*5,v1=u1*5,x1=w1*5,z1=y1*5
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vmovd y1,ruwy1x
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vmovd w1,t1x
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vpunpcklqdq t1,ruwy1,ruwy1
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vmovd u1,t1x
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vmovd r1,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy1,ruwy1
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vpslld $2,ruwy1,svxz1
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vpaddd ruwy1,svxz1,svxz1
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# combine r2,u2,w2,y2 and s2=r2*5,v2=u2*5,x2=w2*5,z2=y2*5
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vmovd y2,ruwy2x
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vmovd w2,t1x
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vpunpcklqdq t1,ruwy2,ruwy2
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vmovd u2,t1x
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vmovd r2,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy2,ruwy2
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vpslld $2,ruwy2,svxz2
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vpaddd ruwy2,svxz2,svxz2
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# combine r3,u3,w3,y3 and s3=r3*5,v3=u3*5,x3=w3*5,z3=y3*5
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vmovd y3,ruwy3x
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vmovd w3,t1x
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vpunpcklqdq t1,ruwy3,ruwy3
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vmovd u3,t1x
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vmovd r3,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy3,ruwy3
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vpslld $2,ruwy3,svxz3
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vpaddd ruwy3,svxz3,svxz3
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# combine r4,u4,w4,y4 and s4=r4*5,v4=u4*5,x4=w4*5,z4=y4*5
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vmovd y4,ruwy4x
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vmovd w4,t1x
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vpunpcklqdq t1,ruwy4,ruwy4
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vmovd u4,t1x
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vmovd r4,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy4,ruwy4
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vpslld $2,ruwy4,svxz4
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vpaddd ruwy4,svxz4,svxz4
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.Ldoblock4:
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# hc0 = [m[48-51] & 0x3ffffff, m[32-35] & 0x3ffffff,
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# m[16-19] & 0x3ffffff, m[ 0- 3] & 0x3ffffff + h0]
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vmovd 0x00(m),hc0x
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vmovd 0x10(m),t1x
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vpunpcklqdq t1,hc0,hc0
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vmovd 0x20(m),t1x
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vmovd 0x30(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc0,hc0
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vpand ANMASK(%rip),hc0,hc0
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vmovd h0,t1x
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vpaddd t1,hc0,hc0
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# hc1 = [(m[51-54] >> 2) & 0x3ffffff, (m[35-38] >> 2) & 0x3ffffff,
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# (m[19-22] >> 2) & 0x3ffffff, (m[ 3- 6] >> 2) & 0x3ffffff + h1]
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vmovd 0x03(m),hc1x
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vmovd 0x13(m),t1x
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vpunpcklqdq t1,hc1,hc1
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vmovd 0x23(m),t1x
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vmovd 0x33(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc1,hc1
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vpsrld $2,hc1,hc1
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vpand ANMASK(%rip),hc1,hc1
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vmovd h1,t1x
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vpaddd t1,hc1,hc1
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# hc2 = [(m[54-57] >> 4) & 0x3ffffff, (m[38-41] >> 4) & 0x3ffffff,
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# (m[22-25] >> 4) & 0x3ffffff, (m[ 6- 9] >> 4) & 0x3ffffff + h2]
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vmovd 0x06(m),hc2x
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vmovd 0x16(m),t1x
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vpunpcklqdq t1,hc2,hc2
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vmovd 0x26(m),t1x
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vmovd 0x36(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc2,hc2
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vpsrld $4,hc2,hc2
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vpand ANMASK(%rip),hc2,hc2
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vmovd h2,t1x
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vpaddd t1,hc2,hc2
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# hc3 = [(m[57-60] >> 6) & 0x3ffffff, (m[41-44] >> 6) & 0x3ffffff,
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# (m[25-28] >> 6) & 0x3ffffff, (m[ 9-12] >> 6) & 0x3ffffff + h3]
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vmovd 0x09(m),hc3x
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vmovd 0x19(m),t1x
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vpunpcklqdq t1,hc3,hc3
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vmovd 0x29(m),t1x
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vmovd 0x39(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc3,hc3
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vpsrld $6,hc3,hc3
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vpand ANMASK(%rip),hc3,hc3
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vmovd h3,t1x
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vpaddd t1,hc3,hc3
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# hc4 = [(m[60-63] >> 8) | (1<<24), (m[44-47] >> 8) | (1<<24),
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# (m[28-31] >> 8) | (1<<24), (m[12-15] >> 8) | (1<<24) + h4]
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vmovd 0x0c(m),hc4x
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vmovd 0x1c(m),t1x
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vpunpcklqdq t1,hc4,hc4
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vmovd 0x2c(m),t1x
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vmovd 0x3c(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc4,hc4
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vpsrld $8,hc4,hc4
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vpor ORMASK(%rip),hc4,hc4
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vmovd h4,t1x
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vpaddd t1,hc4,hc4
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# t1 = [ hc0[3] * r0, hc0[2] * u0, hc0[1] * w0, hc0[0] * y0 ]
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vpmuludq hc0,ruwy0,t1
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# t1 += [ hc1[3] * s4, hc1[2] * v4, hc1[1] * x4, hc1[0] * z4 ]
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vpmuludq hc1,svxz4,t2
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vpaddq t2,t1,t1
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# t1 += [ hc2[3] * s3, hc2[2] * v3, hc2[1] * x3, hc2[0] * z3 ]
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vpmuludq hc2,svxz3,t2
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vpaddq t2,t1,t1
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# t1 += [ hc3[3] * s2, hc3[2] * v2, hc3[1] * x2, hc3[0] * z2 ]
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vpmuludq hc3,svxz2,t2
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vpaddq t2,t1,t1
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# t1 += [ hc4[3] * s1, hc4[2] * v1, hc4[1] * x1, hc4[0] * z1 ]
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vpmuludq hc4,svxz1,t2
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vpaddq t2,t1,t1
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# d0 = t1[0] + t1[1] + t[2] + t[3]
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vpermq $0xee,t1,t2
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vpaddq t2,t1,t1
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vpsrldq $8,t1,t2
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vpaddq t2,t1,t1
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vmovq t1x,d0
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# t1 = [ hc0[3] * r1, hc0[2] * u1,hc0[1] * w1, hc0[0] * y1 ]
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vpmuludq hc0,ruwy1,t1
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# t1 += [ hc1[3] * r0, hc1[2] * u0, hc1[1] * w0, hc1[0] * y0 ]
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vpmuludq hc1,ruwy0,t2
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vpaddq t2,t1,t1
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# t1 += [ hc2[3] * s4, hc2[2] * v4, hc2[1] * x4, hc2[0] * z4 ]
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vpmuludq hc2,svxz4,t2
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vpaddq t2,t1,t1
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# t1 += [ hc3[3] * s3, hc3[2] * v3, hc3[1] * x3, hc3[0] * z3 ]
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vpmuludq hc3,svxz3,t2
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vpaddq t2,t1,t1
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# t1 += [ hc4[3] * s2, hc4[2] * v2, hc4[1] * x2, hc4[0] * z2 ]
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vpmuludq hc4,svxz2,t2
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vpaddq t2,t1,t1
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# d1 = t1[0] + t1[1] + t1[3] + t1[4]
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vpermq $0xee,t1,t2
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vpaddq t2,t1,t1
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vpsrldq $8,t1,t2
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vpaddq t2,t1,t1
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vmovq t1x,d1
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# t1 = [ hc0[3] * r2, hc0[2] * u2, hc0[1] * w2, hc0[0] * y2 ]
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vpmuludq hc0,ruwy2,t1
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# t1 += [ hc1[3] * r1, hc1[2] * u1, hc1[1] * w1, hc1[0] * y1 ]
|
||||
vpmuludq hc1,ruwy1,t2
|
||||
vpaddq t2,t1,t1
|
||||
# t1 += [ hc2[3] * r0, hc2[2] * u0, hc2[1] * w0, hc2[0] * y0 ]
|
||||
vpmuludq hc2,ruwy0,t2
|
||||
vpaddq t2,t1,t1
|
||||
# t1 += [ hc3[3] * s4, hc3[2] * v4, hc3[1] * x4, hc3[0] * z4 ]
|
||||
vpmuludq hc3,svxz4,t2
|
||||
vpaddq t2,t1,t1
|
||||
# t1 += [ hc4[3] * s3, hc4[2] * v3, hc4[1] * x3, hc4[0] * z3 ]
|
||||
vpmuludq hc4,svxz3,t2
|
||||
vpaddq t2,t1,t1
|
||||
# d2 = t1[0] + t1[1] + t1[2] + t1[3]
|
||||
vpermq $0xee,t1,t2
|
||||
vpaddq t2,t1,t1
|
||||
vpsrldq $8,t1,t2
|
||||
vpaddq t2,t1,t1
|
||||
vmovq t1x,d2
|
||||
|
||||
# t1 = [ hc0[3] * r3, hc0[2] * u3, hc0[1] * w3, hc0[0] * y3 ]
|
||||
vpmuludq hc0,ruwy3,t1
|
||||
# t1 += [ hc1[3] * r2, hc1[2] * u2, hc1[1] * w2, hc1[0] * y2 ]
|
||||
vpmuludq hc1,ruwy2,t2
|
||||
vpaddq t2,t1,t1
|
||||
# t1 += [ hc2[3] * r1, hc2[2] * u1, hc2[1] * w1, hc2[0] * y1 ]
|
||||
vpmuludq hc2,ruwy1,t2
|
||||
vpaddq t2,t1,t1
|
||||
# t1 += [ hc3[3] * r0, hc3[2] * u0, hc3[1] * w0, hc3[0] * y0 ]
|
||||
vpmuludq hc3,ruwy0,t2
|
||||
vpaddq t2,t1,t1
|
||||
# t1 += [ hc4[3] * s4, hc4[2] * v4, hc4[1] * x4, hc4[0] * z4 ]
|
||||
vpmuludq hc4,svxz4,t2
|
||||
vpaddq t2,t1,t1
|
||||
# d3 = t1[0] + t1[1] + t1[2] + t1[3]
|
||||
vpermq $0xee,t1,t2
|
||||
vpaddq t2,t1,t1
|
||||
vpsrldq $8,t1,t2
|
||||
vpaddq t2,t1,t1
|
||||
vmovq t1x,d3
|
||||
|
||||
# t1 = [ hc0[3] * r4, hc0[2] * u4, hc0[1] * w4, hc0[0] * y4 ]
|
||||
vpmuludq hc0,ruwy4,t1
|
||||
# t1 += [ hc1[3] * r3, hc1[2] * u3, hc1[1] * w3, hc1[0] * y3 ]
|
||||
vpmuludq hc1,ruwy3,t2
|
||||
vpaddq t2,t1,t1
|
||||
# t1 += [ hc2[3] * r2, hc2[2] * u2, hc2[1] * w2, hc2[0] * y2 ]
|
||||
vpmuludq hc2,ruwy2,t2
|
||||
vpaddq t2,t1,t1
|
||||
# t1 += [ hc3[3] * r1, hc3[2] * u1, hc3[1] * w1, hc3[0] * y1 ]
|
||||
vpmuludq hc3,ruwy1,t2
|
||||
vpaddq t2,t1,t1
|
||||
# t1 += [ hc4[3] * r0, hc4[2] * u0, hc4[1] * w0, hc4[0] * y0 ]
|
||||
vpmuludq hc4,ruwy0,t2
|
||||
vpaddq t2,t1,t1
|
||||
# d4 = t1[0] + t1[1] + t1[2] + t1[3]
|
||||
vpermq $0xee,t1,t2
|
||||
vpaddq t2,t1,t1
|
||||
vpsrldq $8,t1,t2
|
||||
vpaddq t2,t1,t1
|
||||
vmovq t1x,d4
|
||||
|
||||
# Now do a partial reduction mod (2^130)-5, carrying h0 -> h1 -> h2 ->
|
||||
# h3 -> h4 -> h0 -> h1 to get h0,h2,h3,h4 < 2^26 and h1 < 2^26 + a small
|
||||
# amount. Careful: we must not assume the carry bits 'd0 >> 26',
|
||||
# 'd1 >> 26', 'd2 >> 26', 'd3 >> 26', and '(d4 >> 26) * 5' fit in 32-bit
|
||||
# integers. It's true in a single-block implementation, but not here.
|
||||
|
||||
# d1 += d0 >> 26
|
||||
mov d0,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d1
|
||||
# h0 = d0 & 0x3ffffff
|
||||
mov d0,%rbx
|
||||
and $0x3ffffff,%ebx
|
||||
|
||||
# d2 += d1 >> 26
|
||||
mov d1,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d2
|
||||
# h1 = d1 & 0x3ffffff
|
||||
mov d1,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h1
|
||||
|
||||
# d3 += d2 >> 26
|
||||
mov d2,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d3
|
||||
# h2 = d2 & 0x3ffffff
|
||||
mov d2,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h2
|
||||
|
||||
# d4 += d3 >> 26
|
||||
mov d3,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d4
|
||||
# h3 = d3 & 0x3ffffff
|
||||
mov d3,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h3
|
||||
|
||||
# h0 += (d4 >> 26) * 5
|
||||
mov d4,%rax
|
||||
shr $26,%rax
|
||||
lea (%rax,%rax,4),%rax
|
||||
add %rax,%rbx
|
||||
# h4 = d4 & 0x3ffffff
|
||||
mov d4,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h4
|
||||
|
||||
# h1 += h0 >> 26
|
||||
mov %rbx,%rax
|
||||
shr $26,%rax
|
||||
add %eax,h1
|
||||
# h0 = h0 & 0x3ffffff
|
||||
andl $0x3ffffff,%ebx
|
||||
mov %ebx,h0
|
||||
|
||||
add $0x40,m
|
||||
dec %rcx
|
||||
jnz .Ldoblock4
|
||||
|
||||
vzeroupper
|
||||
pop %r13
|
||||
pop %r12
|
||||
pop %rbx
|
||||
ret
|
||||
SYM_FUNC_END(poly1305_4block_avx2)
|
||||
@ -1,590 +0,0 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||||
/*
|
||||
* Poly1305 authenticator algorithm, RFC7539, x64 SSE2 functions
|
||||
*
|
||||
* Copyright (C) 2015 Martin Willi
|
||||
*/
|
||||
|
||||
#include <linux/linkage.h>
|
||||
|
||||
.section .rodata.cst16.ANMASK, "aM", @progbits, 16
|
||||
.align 16
|
||||
ANMASK: .octa 0x0000000003ffffff0000000003ffffff
|
||||
|
||||
.section .rodata.cst16.ORMASK, "aM", @progbits, 16
|
||||
.align 16
|
||||
ORMASK: .octa 0x00000000010000000000000001000000
|
||||
|
||||
.text
|
||||
|
||||
#define h0 0x00(%rdi)
|
||||
#define h1 0x04(%rdi)
|
||||
#define h2 0x08(%rdi)
|
||||
#define h3 0x0c(%rdi)
|
||||
#define h4 0x10(%rdi)
|
||||
#define r0 0x00(%rdx)
|
||||
#define r1 0x04(%rdx)
|
||||
#define r2 0x08(%rdx)
|
||||
#define r3 0x0c(%rdx)
|
||||
#define r4 0x10(%rdx)
|
||||
#define s1 0x00(%rsp)
|
||||
#define s2 0x04(%rsp)
|
||||
#define s3 0x08(%rsp)
|
||||
#define s4 0x0c(%rsp)
|
||||
#define m %rsi
|
||||
#define h01 %xmm0
|
||||
#define h23 %xmm1
|
||||
#define h44 %xmm2
|
||||
#define t1 %xmm3
|
||||
#define t2 %xmm4
|
||||
#define t3 %xmm5
|
||||
#define t4 %xmm6
|
||||
#define mask %xmm7
|
||||
#define d0 %r8
|
||||
#define d1 %r9
|
||||
#define d2 %r10
|
||||
#define d3 %r11
|
||||
#define d4 %r12
|
||||
|
||||
SYM_FUNC_START(poly1305_block_sse2)
|
||||
# %rdi: Accumulator h[5]
|
||||
# %rsi: 16 byte input block m
|
||||
# %rdx: Poly1305 key r[5]
|
||||
# %rcx: Block count
|
||||
|
||||
# This single block variant tries to improve performance by doing two
|
||||
# multiplications in parallel using SSE instructions. There is quite
|
||||
# some quardword packing involved, hence the speedup is marginal.
|
||||
|
||||
push %rbx
|
||||
push %r12
|
||||
sub $0x10,%rsp
|
||||
|
||||
# s1..s4 = r1..r4 * 5
|
||||
mov r1,%eax
|
||||
lea (%eax,%eax,4),%eax
|
||||
mov %eax,s1
|
||||
mov r2,%eax
|
||||
lea (%eax,%eax,4),%eax
|
||||
mov %eax,s2
|
||||
mov r3,%eax
|
||||
lea (%eax,%eax,4),%eax
|
||||
mov %eax,s3
|
||||
mov r4,%eax
|
||||
lea (%eax,%eax,4),%eax
|
||||
mov %eax,s4
|
||||
|
||||
movdqa ANMASK(%rip),mask
|
||||
|
||||
.Ldoblock:
|
||||
# h01 = [0, h1, 0, h0]
|
||||
# h23 = [0, h3, 0, h2]
|
||||
# h44 = [0, h4, 0, h4]
|
||||
movd h0,h01
|
||||
movd h1,t1
|
||||
movd h2,h23
|
||||
movd h3,t2
|
||||
movd h4,h44
|
||||
punpcklqdq t1,h01
|
||||
punpcklqdq t2,h23
|
||||
punpcklqdq h44,h44
|
||||
|
||||
# h01 += [ (m[3-6] >> 2) & 0x3ffffff, m[0-3] & 0x3ffffff ]
|
||||
movd 0x00(m),t1
|
||||
movd 0x03(m),t2
|
||||
psrld $2,t2
|
||||
punpcklqdq t2,t1
|
||||
pand mask,t1
|
||||
paddd t1,h01
|
||||
# h23 += [ (m[9-12] >> 6) & 0x3ffffff, (m[6-9] >> 4) & 0x3ffffff ]
|
||||
movd 0x06(m),t1
|
||||
movd 0x09(m),t2
|
||||
psrld $4,t1
|
||||
psrld $6,t2
|
||||
punpcklqdq t2,t1
|
||||
pand mask,t1
|
||||
paddd t1,h23
|
||||
# h44 += [ (m[12-15] >> 8) | (1 << 24), (m[12-15] >> 8) | (1 << 24) ]
|
||||
mov 0x0c(m),%eax
|
||||
shr $8,%eax
|
||||
or $0x01000000,%eax
|
||||
movd %eax,t1
|
||||
pshufd $0xc4,t1,t1
|
||||
paddd t1,h44
|
||||
|
||||
# t1[0] = h0 * r0 + h2 * s3
|
||||
# t1[1] = h1 * s4 + h3 * s2
|
||||
movd r0,t1
|
||||
movd s4,t2
|
||||
punpcklqdq t2,t1
|
||||
pmuludq h01,t1
|
||||
movd s3,t2
|
||||
movd s2,t3
|
||||
punpcklqdq t3,t2
|
||||
pmuludq h23,t2
|
||||
paddq t2,t1
|
||||
# t2[0] = h0 * r1 + h2 * s4
|
||||
# t2[1] = h1 * r0 + h3 * s3
|
||||
movd r1,t2
|
||||
movd r0,t3
|
||||
punpcklqdq t3,t2
|
||||
pmuludq h01,t2
|
||||
movd s4,t3
|
||||
movd s3,t4
|
||||
punpcklqdq t4,t3
|
||||
pmuludq h23,t3
|
||||
paddq t3,t2
|
||||
# t3[0] = h4 * s1
|
||||
# t3[1] = h4 * s2
|
||||
movd s1,t3
|
||||
movd s2,t4
|
||||
punpcklqdq t4,t3
|
||||
pmuludq h44,t3
|
||||
# d0 = t1[0] + t1[1] + t3[0]
|
||||
# d1 = t2[0] + t2[1] + t3[1]
|
||||
movdqa t1,t4
|
||||
punpcklqdq t2,t4
|
||||
punpckhqdq t2,t1
|
||||
paddq t4,t1
|
||||
paddq t3,t1
|
||||
movq t1,d0
|
||||
psrldq $8,t1
|
||||
movq t1,d1
|
||||
|
||||
# t1[0] = h0 * r2 + h2 * r0
|
||||
# t1[1] = h1 * r1 + h3 * s4
|
||||
movd r2,t1
|
||||
movd r1,t2
|
||||
punpcklqdq t2,t1
|
||||
pmuludq h01,t1
|
||||
movd r0,t2
|
||||
movd s4,t3
|
||||
punpcklqdq t3,t2
|
||||
pmuludq h23,t2
|
||||
paddq t2,t1
|
||||
# t2[0] = h0 * r3 + h2 * r1
|
||||
# t2[1] = h1 * r2 + h3 * r0
|
||||
movd r3,t2
|
||||
movd r2,t3
|
||||
punpcklqdq t3,t2
|
||||
pmuludq h01,t2
|
||||
movd r1,t3
|
||||
movd r0,t4
|
||||
punpcklqdq t4,t3
|
||||
pmuludq h23,t3
|
||||
paddq t3,t2
|
||||
# t3[0] = h4 * s3
|
||||
# t3[1] = h4 * s4
|
||||
movd s3,t3
|
||||
movd s4,t4
|
||||
punpcklqdq t4,t3
|
||||
pmuludq h44,t3
|
||||
# d2 = t1[0] + t1[1] + t3[0]
|
||||
# d3 = t2[0] + t2[1] + t3[1]
|
||||
movdqa t1,t4
|
||||
punpcklqdq t2,t4
|
||||
punpckhqdq t2,t1
|
||||
paddq t4,t1
|
||||
paddq t3,t1
|
||||
movq t1,d2
|
||||
psrldq $8,t1
|
||||
movq t1,d3
|
||||
|
||||
# t1[0] = h0 * r4 + h2 * r2
|
||||
# t1[1] = h1 * r3 + h3 * r1
|
||||
movd r4,t1
|
||||
movd r3,t2
|
||||
punpcklqdq t2,t1
|
||||
pmuludq h01,t1
|
||||
movd r2,t2
|
||||
movd r1,t3
|
||||
punpcklqdq t3,t2
|
||||
pmuludq h23,t2
|
||||
paddq t2,t1
|
||||
# t3[0] = h4 * r0
|
||||
movd r0,t3
|
||||
pmuludq h44,t3
|
||||
# d4 = t1[0] + t1[1] + t3[0]
|
||||
movdqa t1,t4
|
||||
psrldq $8,t4
|
||||
paddq t4,t1
|
||||
paddq t3,t1
|
||||
movq t1,d4
|
||||
|
||||
# d1 += d0 >> 26
|
||||
mov d0,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d1
|
||||
# h0 = d0 & 0x3ffffff
|
||||
mov d0,%rbx
|
||||
and $0x3ffffff,%ebx
|
||||
|
||||
# d2 += d1 >> 26
|
||||
mov d1,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d2
|
||||
# h1 = d1 & 0x3ffffff
|
||||
mov d1,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h1
|
||||
|
||||
# d3 += d2 >> 26
|
||||
mov d2,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d3
|
||||
# h2 = d2 & 0x3ffffff
|
||||
mov d2,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h2
|
||||
|
||||
# d4 += d3 >> 26
|
||||
mov d3,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d4
|
||||
# h3 = d3 & 0x3ffffff
|
||||
mov d3,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h3
|
||||
|
||||
# h0 += (d4 >> 26) * 5
|
||||
mov d4,%rax
|
||||
shr $26,%rax
|
||||
lea (%rax,%rax,4),%rax
|
||||
add %rax,%rbx
|
||||
# h4 = d4 & 0x3ffffff
|
||||
mov d4,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h4
|
||||
|
||||
# h1 += h0 >> 26
|
||||
mov %rbx,%rax
|
||||
shr $26,%rax
|
||||
add %eax,h1
|
||||
# h0 = h0 & 0x3ffffff
|
||||
andl $0x3ffffff,%ebx
|
||||
mov %ebx,h0
|
||||
|
||||
add $0x10,m
|
||||
dec %rcx
|
||||
jnz .Ldoblock
|
||||
|
||||
# Zeroing of key material
|
||||
mov %rcx,0x00(%rsp)
|
||||
mov %rcx,0x08(%rsp)
|
||||
|
||||
add $0x10,%rsp
|
||||
pop %r12
|
||||
pop %rbx
|
||||
ret
|
||||
SYM_FUNC_END(poly1305_block_sse2)
|
||||
|
||||
|
||||
#define u0 0x00(%r8)
|
||||
#define u1 0x04(%r8)
|
||||
#define u2 0x08(%r8)
|
||||
#define u3 0x0c(%r8)
|
||||
#define u4 0x10(%r8)
|
||||
#define hc0 %xmm0
|
||||
#define hc1 %xmm1
|
||||
#define hc2 %xmm2
|
||||
#define hc3 %xmm5
|
||||
#define hc4 %xmm6
|
||||
#define ru0 %xmm7
|
||||
#define ru1 %xmm8
|
||||
#define ru2 %xmm9
|
||||
#define ru3 %xmm10
|
||||
#define ru4 %xmm11
|
||||
#define sv1 %xmm12
|
||||
#define sv2 %xmm13
|
||||
#define sv3 %xmm14
|
||||
#define sv4 %xmm15
|
||||
#undef d0
|
||||
#define d0 %r13
|
||||
|
||||
SYM_FUNC_START(poly1305_2block_sse2)
|
||||
# %rdi: Accumulator h[5]
|
||||
# %rsi: 16 byte input block m
|
||||
# %rdx: Poly1305 key r[5]
|
||||
# %rcx: Doubleblock count
|
||||
# %r8: Poly1305 derived key r^2 u[5]
|
||||
|
||||
# This two-block variant further improves performance by using loop
|
||||
# unrolled block processing. This is more straight forward and does
|
||||
# less byte shuffling, but requires a second Poly1305 key r^2:
|
||||
# h = (h + m) * r => h = (h + m1) * r^2 + m2 * r
|
||||
|
||||
push %rbx
|
||||
push %r12
|
||||
push %r13
|
||||
|
||||
# combine r0,u0
|
||||
movd u0,ru0
|
||||
movd r0,t1
|
||||
punpcklqdq t1,ru0
|
||||
|
||||
# combine r1,u1 and s1=r1*5,v1=u1*5
|
||||
movd u1,ru1
|
||||
movd r1,t1
|
||||
punpcklqdq t1,ru1
|
||||
movdqa ru1,sv1
|
||||
pslld $2,sv1
|
||||
paddd ru1,sv1
|
||||
|
||||
# combine r2,u2 and s2=r2*5,v2=u2*5
|
||||
movd u2,ru2
|
||||
movd r2,t1
|
||||
punpcklqdq t1,ru2
|
||||
movdqa ru2,sv2
|
||||
pslld $2,sv2
|
||||
paddd ru2,sv2
|
||||
|
||||
# combine r3,u3 and s3=r3*5,v3=u3*5
|
||||
movd u3,ru3
|
||||
movd r3,t1
|
||||
punpcklqdq t1,ru3
|
||||
movdqa ru3,sv3
|
||||
pslld $2,sv3
|
||||
paddd ru3,sv3
|
||||
|
||||
# combine r4,u4 and s4=r4*5,v4=u4*5
|
||||
movd u4,ru4
|
||||
movd r4,t1
|
||||
punpcklqdq t1,ru4
|
||||
movdqa ru4,sv4
|
||||
pslld $2,sv4
|
||||
paddd ru4,sv4
|
||||
|
||||
.Ldoblock2:
|
||||
# hc0 = [ m[16-19] & 0x3ffffff, h0 + m[0-3] & 0x3ffffff ]
|
||||
movd 0x00(m),hc0
|
||||
movd 0x10(m),t1
|
||||
punpcklqdq t1,hc0
|
||||
pand ANMASK(%rip),hc0
|
||||
movd h0,t1
|
||||
paddd t1,hc0
|
||||
# hc1 = [ (m[19-22] >> 2) & 0x3ffffff, h1 + (m[3-6] >> 2) & 0x3ffffff ]
|
||||
movd 0x03(m),hc1
|
||||
movd 0x13(m),t1
|
||||
punpcklqdq t1,hc1
|
||||
psrld $2,hc1
|
||||
pand ANMASK(%rip),hc1
|
||||
movd h1,t1
|
||||
paddd t1,hc1
|
||||
# hc2 = [ (m[22-25] >> 4) & 0x3ffffff, h2 + (m[6-9] >> 4) & 0x3ffffff ]
|
||||
movd 0x06(m),hc2
|
||||
movd 0x16(m),t1
|
||||
punpcklqdq t1,hc2
|
||||
psrld $4,hc2
|
||||
pand ANMASK(%rip),hc2
|
||||
movd h2,t1
|
||||
paddd t1,hc2
|
||||
# hc3 = [ (m[25-28] >> 6) & 0x3ffffff, h3 + (m[9-12] >> 6) & 0x3ffffff ]
|
||||
movd 0x09(m),hc3
|
||||
movd 0x19(m),t1
|
||||
punpcklqdq t1,hc3
|
||||
psrld $6,hc3
|
||||
pand ANMASK(%rip),hc3
|
||||
movd h3,t1
|
||||
paddd t1,hc3
|
||||
# hc4 = [ (m[28-31] >> 8) | (1<<24), h4 + (m[12-15] >> 8) | (1<<24) ]
|
||||
movd 0x0c(m),hc4
|
||||
movd 0x1c(m),t1
|
||||
punpcklqdq t1,hc4
|
||||
psrld $8,hc4
|
||||
por ORMASK(%rip),hc4
|
||||
movd h4,t1
|
||||
paddd t1,hc4
|
||||
|
||||
# t1 = [ hc0[1] * r0, hc0[0] * u0 ]
|
||||
movdqa ru0,t1
|
||||
pmuludq hc0,t1
|
||||
# t1 += [ hc1[1] * s4, hc1[0] * v4 ]
|
||||
movdqa sv4,t2
|
||||
pmuludq hc1,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc2[1] * s3, hc2[0] * v3 ]
|
||||
movdqa sv3,t2
|
||||
pmuludq hc2,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc3[1] * s2, hc3[0] * v2 ]
|
||||
movdqa sv2,t2
|
||||
pmuludq hc3,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc4[1] * s1, hc4[0] * v1 ]
|
||||
movdqa sv1,t2
|
||||
pmuludq hc4,t2
|
||||
paddq t2,t1
|
||||
# d0 = t1[0] + t1[1]
|
||||
movdqa t1,t2
|
||||
psrldq $8,t2
|
||||
paddq t2,t1
|
||||
movq t1,d0
|
||||
|
||||
# t1 = [ hc0[1] * r1, hc0[0] * u1 ]
|
||||
movdqa ru1,t1
|
||||
pmuludq hc0,t1
|
||||
# t1 += [ hc1[1] * r0, hc1[0] * u0 ]
|
||||
movdqa ru0,t2
|
||||
pmuludq hc1,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc2[1] * s4, hc2[0] * v4 ]
|
||||
movdqa sv4,t2
|
||||
pmuludq hc2,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc3[1] * s3, hc3[0] * v3 ]
|
||||
movdqa sv3,t2
|
||||
pmuludq hc3,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc4[1] * s2, hc4[0] * v2 ]
|
||||
movdqa sv2,t2
|
||||
pmuludq hc4,t2
|
||||
paddq t2,t1
|
||||
# d1 = t1[0] + t1[1]
|
||||
movdqa t1,t2
|
||||
psrldq $8,t2
|
||||
paddq t2,t1
|
||||
movq t1,d1
|
||||
|
||||
# t1 = [ hc0[1] * r2, hc0[0] * u2 ]
|
||||
movdqa ru2,t1
|
||||
pmuludq hc0,t1
|
||||
# t1 += [ hc1[1] * r1, hc1[0] * u1 ]
|
||||
movdqa ru1,t2
|
||||
pmuludq hc1,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc2[1] * r0, hc2[0] * u0 ]
|
||||
movdqa ru0,t2
|
||||
pmuludq hc2,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc3[1] * s4, hc3[0] * v4 ]
|
||||
movdqa sv4,t2
|
||||
pmuludq hc3,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc4[1] * s3, hc4[0] * v3 ]
|
||||
movdqa sv3,t2
|
||||
pmuludq hc4,t2
|
||||
paddq t2,t1
|
||||
# d2 = t1[0] + t1[1]
|
||||
movdqa t1,t2
|
||||
psrldq $8,t2
|
||||
paddq t2,t1
|
||||
movq t1,d2
|
||||
|
||||
# t1 = [ hc0[1] * r3, hc0[0] * u3 ]
|
||||
movdqa ru3,t1
|
||||
pmuludq hc0,t1
|
||||
# t1 += [ hc1[1] * r2, hc1[0] * u2 ]
|
||||
movdqa ru2,t2
|
||||
pmuludq hc1,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc2[1] * r1, hc2[0] * u1 ]
|
||||
movdqa ru1,t2
|
||||
pmuludq hc2,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc3[1] * r0, hc3[0] * u0 ]
|
||||
movdqa ru0,t2
|
||||
pmuludq hc3,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc4[1] * s4, hc4[0] * v4 ]
|
||||
movdqa sv4,t2
|
||||
pmuludq hc4,t2
|
||||
paddq t2,t1
|
||||
# d3 = t1[0] + t1[1]
|
||||
movdqa t1,t2
|
||||
psrldq $8,t2
|
||||
paddq t2,t1
|
||||
movq t1,d3
|
||||
|
||||
# t1 = [ hc0[1] * r4, hc0[0] * u4 ]
|
||||
movdqa ru4,t1
|
||||
pmuludq hc0,t1
|
||||
# t1 += [ hc1[1] * r3, hc1[0] * u3 ]
|
||||
movdqa ru3,t2
|
||||
pmuludq hc1,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc2[1] * r2, hc2[0] * u2 ]
|
||||
movdqa ru2,t2
|
||||
pmuludq hc2,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc3[1] * r1, hc3[0] * u1 ]
|
||||
movdqa ru1,t2
|
||||
pmuludq hc3,t2
|
||||
paddq t2,t1
|
||||
# t1 += [ hc4[1] * r0, hc4[0] * u0 ]
|
||||
movdqa ru0,t2
|
||||
pmuludq hc4,t2
|
||||
paddq t2,t1
|
||||
# d4 = t1[0] + t1[1]
|
||||
movdqa t1,t2
|
||||
psrldq $8,t2
|
||||
paddq t2,t1
|
||||
movq t1,d4
|
||||
|
||||
# Now do a partial reduction mod (2^130)-5, carrying h0 -> h1 -> h2 ->
|
||||
# h3 -> h4 -> h0 -> h1 to get h0,h2,h3,h4 < 2^26 and h1 < 2^26 + a small
|
||||
# amount. Careful: we must not assume the carry bits 'd0 >> 26',
|
||||
# 'd1 >> 26', 'd2 >> 26', 'd3 >> 26', and '(d4 >> 26) * 5' fit in 32-bit
|
||||
# integers. It's true in a single-block implementation, but not here.
|
||||
|
||||
# d1 += d0 >> 26
|
||||
mov d0,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d1
|
||||
# h0 = d0 & 0x3ffffff
|
||||
mov d0,%rbx
|
||||
and $0x3ffffff,%ebx
|
||||
|
||||
# d2 += d1 >> 26
|
||||
mov d1,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d2
|
||||
# h1 = d1 & 0x3ffffff
|
||||
mov d1,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h1
|
||||
|
||||
# d3 += d2 >> 26
|
||||
mov d2,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d3
|
||||
# h2 = d2 & 0x3ffffff
|
||||
mov d2,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h2
|
||||
|
||||
# d4 += d3 >> 26
|
||||
mov d3,%rax
|
||||
shr $26,%rax
|
||||
add %rax,d4
|
||||
# h3 = d3 & 0x3ffffff
|
||||
mov d3,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h3
|
||||
|
||||
# h0 += (d4 >> 26) * 5
|
||||
mov d4,%rax
|
||||
shr $26,%rax
|
||||
lea (%rax,%rax,4),%rax
|
||||
add %rax,%rbx
|
||||
# h4 = d4 & 0x3ffffff
|
||||
mov d4,%rax
|
||||
and $0x3ffffff,%eax
|
||||
mov %eax,h4
|
||||
|
||||
# h1 += h0 >> 26
|
||||
mov %rbx,%rax
|
||||
shr $26,%rax
|
||||
add %eax,h1
|
||||
# h0 = h0 & 0x3ffffff
|
||||
andl $0x3ffffff,%ebx
|
||||
mov %ebx,h0
|
||||
|
||||
add $0x20,m
|
||||
dec %rcx
|
||||
jnz .Ldoblock2
|
||||
|
||||
pop %r13
|
||||
pop %r12
|
||||
pop %rbx
|
||||
ret
|
||||
SYM_FUNC_END(poly1305_2block_sse2)
|
||||
File diff suppressed because it is too large
Load Diff
@ -1,8 +1,6 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-or-later
|
||||
// SPDX-License-Identifier: GPL-2.0 OR MIT
|
||||
/*
|
||||
* Poly1305 authenticator algorithm, RFC7539, SIMD glue code
|
||||
*
|
||||
* Copyright (C) 2015 Martin Willi
|
||||
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
||||
*/
|
||||
|
||||
#include <crypto/algapi.h>
|
||||
@ -13,279 +11,170 @@
|
||||
#include <linux/jump_label.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <asm/intel-family.h>
|
||||
#include <asm/simd.h>
|
||||
|
||||
asmlinkage void poly1305_block_sse2(u32 *h, const u8 *src,
|
||||
const u32 *r, unsigned int blocks);
|
||||
asmlinkage void poly1305_2block_sse2(u32 *h, const u8 *src, const u32 *r,
|
||||
unsigned int blocks, const u32 *u);
|
||||
asmlinkage void poly1305_4block_avx2(u32 *h, const u8 *src, const u32 *r,
|
||||
unsigned int blocks, const u32 *u);
|
||||
asmlinkage void poly1305_init_x86_64(void *ctx,
|
||||
const u8 key[POLY1305_KEY_SIZE]);
|
||||
asmlinkage void poly1305_blocks_x86_64(void *ctx, const u8 *inp,
|
||||
const size_t len, const u32 padbit);
|
||||
asmlinkage void poly1305_emit_x86_64(void *ctx, u8 mac[POLY1305_DIGEST_SIZE],
|
||||
const u32 nonce[4]);
|
||||
asmlinkage void poly1305_emit_avx(void *ctx, u8 mac[POLY1305_DIGEST_SIZE],
|
||||
const u32 nonce[4]);
|
||||
asmlinkage void poly1305_blocks_avx(void *ctx, const u8 *inp, const size_t len,
|
||||
const u32 padbit);
|
||||
asmlinkage void poly1305_blocks_avx2(void *ctx, const u8 *inp, const size_t len,
|
||||
const u32 padbit);
|
||||
asmlinkage void poly1305_blocks_avx512(void *ctx, const u8 *inp,
|
||||
const size_t len, const u32 padbit);
|
||||
|
||||
static __ro_after_init DEFINE_STATIC_KEY_FALSE(poly1305_use_simd);
|
||||
static __ro_after_init DEFINE_STATIC_KEY_FALSE(poly1305_use_avx);
|
||||
static __ro_after_init DEFINE_STATIC_KEY_FALSE(poly1305_use_avx2);
|
||||
static __ro_after_init DEFINE_STATIC_KEY_FALSE(poly1305_use_avx512);
|
||||
|
||||
static inline u64 mlt(u64 a, u64 b)
|
||||
struct poly1305_arch_internal {
|
||||
union {
|
||||
struct {
|
||||
u32 h[5];
|
||||
u32 is_base2_26;
|
||||
};
|
||||
u64 hs[3];
|
||||
};
|
||||
u64 r[2];
|
||||
u64 pad;
|
||||
struct { u32 r2, r1, r4, r3; } rn[9];
|
||||
};
|
||||
|
||||
/* The AVX code uses base 2^26, while the scalar code uses base 2^64. If we hit
|
||||
* the unfortunate situation of using AVX and then having to go back to scalar
|
||||
* -- because the user is silly and has called the update function from two
|
||||
* separate contexts -- then we need to convert back to the original base before
|
||||
* proceeding. It is possible to reason that the initial reduction below is
|
||||
* sufficient given the implementation invariants. However, for an avoidance of
|
||||
* doubt and because this is not performance critical, we do the full reduction
|
||||
* anyway. Z3 proof of below function: https://xn--4db.cc/ltPtHCKN/py
|
||||
*/
|
||||
static void convert_to_base2_64(void *ctx)
|
||||
{
|
||||
return a * b;
|
||||
}
|
||||
struct poly1305_arch_internal *state = ctx;
|
||||
u32 cy;
|
||||
|
||||
static inline u32 sr(u64 v, u_char n)
|
||||
{
|
||||
return v >> n;
|
||||
}
|
||||
|
||||
static inline u32 and(u32 v, u32 mask)
|
||||
{
|
||||
return v & mask;
|
||||
}
|
||||
|
||||
static void poly1305_simd_mult(u32 *a, const u32 *b)
|
||||
{
|
||||
u8 m[POLY1305_BLOCK_SIZE];
|
||||
|
||||
memset(m, 0, sizeof(m));
|
||||
/* The poly1305 block function adds a hi-bit to the accumulator which
|
||||
* we don't need for key multiplication; compensate for it. */
|
||||
a[4] -= 1 << 24;
|
||||
poly1305_block_sse2(a, m, b, 1);
|
||||
}
|
||||
|
||||
static void poly1305_integer_setkey(struct poly1305_key *key, const u8 *raw_key)
|
||||
{
|
||||
/* r &= 0xffffffc0ffffffc0ffffffc0fffffff */
|
||||
key->r[0] = (get_unaligned_le32(raw_key + 0) >> 0) & 0x3ffffff;
|
||||
key->r[1] = (get_unaligned_le32(raw_key + 3) >> 2) & 0x3ffff03;
|
||||
key->r[2] = (get_unaligned_le32(raw_key + 6) >> 4) & 0x3ffc0ff;
|
||||
key->r[3] = (get_unaligned_le32(raw_key + 9) >> 6) & 0x3f03fff;
|
||||
key->r[4] = (get_unaligned_le32(raw_key + 12) >> 8) & 0x00fffff;
|
||||
}
|
||||
|
||||
static void poly1305_integer_blocks(struct poly1305_state *state,
|
||||
const struct poly1305_key *key,
|
||||
const void *src,
|
||||
unsigned int nblocks, u32 hibit)
|
||||
{
|
||||
u32 r0, r1, r2, r3, r4;
|
||||
u32 s1, s2, s3, s4;
|
||||
u32 h0, h1, h2, h3, h4;
|
||||
u64 d0, d1, d2, d3, d4;
|
||||
|
||||
if (!nblocks)
|
||||
if (!state->is_base2_26)
|
||||
return;
|
||||
|
||||
r0 = key->r[0];
|
||||
r1 = key->r[1];
|
||||
r2 = key->r[2];
|
||||
r3 = key->r[3];
|
||||
r4 = key->r[4];
|
||||
|
||||
s1 = r1 * 5;
|
||||
s2 = r2 * 5;
|
||||
s3 = r3 * 5;
|
||||
s4 = r4 * 5;
|
||||
|
||||
h0 = state->h[0];
|
||||
h1 = state->h[1];
|
||||
h2 = state->h[2];
|
||||
h3 = state->h[3];
|
||||
h4 = state->h[4];
|
||||
|
||||
do {
|
||||
/* h += m[i] */
|
||||
h0 += (get_unaligned_le32(src + 0) >> 0) & 0x3ffffff;
|
||||
h1 += (get_unaligned_le32(src + 3) >> 2) & 0x3ffffff;
|
||||
h2 += (get_unaligned_le32(src + 6) >> 4) & 0x3ffffff;
|
||||
h3 += (get_unaligned_le32(src + 9) >> 6) & 0x3ffffff;
|
||||
h4 += (get_unaligned_le32(src + 12) >> 8) | (hibit << 24);
|
||||
|
||||
/* h *= r */
|
||||
d0 = mlt(h0, r0) + mlt(h1, s4) + mlt(h2, s3) +
|
||||
mlt(h3, s2) + mlt(h4, s1);
|
||||
d1 = mlt(h0, r1) + mlt(h1, r0) + mlt(h2, s4) +
|
||||
mlt(h3, s3) + mlt(h4, s2);
|
||||
d2 = mlt(h0, r2) + mlt(h1, r1) + mlt(h2, r0) +
|
||||
mlt(h3, s4) + mlt(h4, s3);
|
||||
d3 = mlt(h0, r3) + mlt(h1, r2) + mlt(h2, r1) +
|
||||
mlt(h3, r0) + mlt(h4, s4);
|
||||
d4 = mlt(h0, r4) + mlt(h1, r3) + mlt(h2, r2) +
|
||||
mlt(h3, r1) + mlt(h4, r0);
|
||||
|
||||
/* (partial) h %= p */
|
||||
d1 += sr(d0, 26); h0 = and(d0, 0x3ffffff);
|
||||
d2 += sr(d1, 26); h1 = and(d1, 0x3ffffff);
|
||||
d3 += sr(d2, 26); h2 = and(d2, 0x3ffffff);
|
||||
d4 += sr(d3, 26); h3 = and(d3, 0x3ffffff);
|
||||
h0 += sr(d4, 26) * 5; h4 = and(d4, 0x3ffffff);
|
||||
h1 += h0 >> 26; h0 = h0 & 0x3ffffff;
|
||||
|
||||
src += POLY1305_BLOCK_SIZE;
|
||||
} while (--nblocks);
|
||||
|
||||
state->h[0] = h0;
|
||||
state->h[1] = h1;
|
||||
state->h[2] = h2;
|
||||
state->h[3] = h3;
|
||||
state->h[4] = h4;
|
||||
cy = state->h[0] >> 26; state->h[0] &= 0x3ffffff; state->h[1] += cy;
|
||||
cy = state->h[1] >> 26; state->h[1] &= 0x3ffffff; state->h[2] += cy;
|
||||
cy = state->h[2] >> 26; state->h[2] &= 0x3ffffff; state->h[3] += cy;
|
||||
cy = state->h[3] >> 26; state->h[3] &= 0x3ffffff; state->h[4] += cy;
|
||||
state->hs[0] = ((u64)state->h[2] << 52) | ((u64)state->h[1] << 26) | state->h[0];
|
||||
state->hs[1] = ((u64)state->h[4] << 40) | ((u64)state->h[3] << 14) | (state->h[2] >> 12);
|
||||
state->hs[2] = state->h[4] >> 24;
|
||||
#define ULT(a, b) ((a ^ ((a ^ b) | ((a - b) ^ b))) >> (sizeof(a) * 8 - 1))
|
||||
cy = (state->hs[2] >> 2) + (state->hs[2] & ~3ULL);
|
||||
state->hs[2] &= 3;
|
||||
state->hs[0] += cy;
|
||||
state->hs[1] += (cy = ULT(state->hs[0], cy));
|
||||
state->hs[2] += ULT(state->hs[1], cy);
|
||||
#undef ULT
|
||||
state->is_base2_26 = 0;
|
||||
}
|
||||
|
||||
static void poly1305_integer_emit(const struct poly1305_state *state, void *dst)
|
||||
static void poly1305_simd_init(void *ctx, const u8 key[POLY1305_KEY_SIZE])
|
||||
{
|
||||
u32 h0, h1, h2, h3, h4;
|
||||
u32 g0, g1, g2, g3, g4;
|
||||
u32 mask;
|
||||
|
||||
/* fully carry h */
|
||||
h0 = state->h[0];
|
||||
h1 = state->h[1];
|
||||
h2 = state->h[2];
|
||||
h3 = state->h[3];
|
||||
h4 = state->h[4];
|
||||
|
||||
h2 += (h1 >> 26); h1 = h1 & 0x3ffffff;
|
||||
h3 += (h2 >> 26); h2 = h2 & 0x3ffffff;
|
||||
h4 += (h3 >> 26); h3 = h3 & 0x3ffffff;
|
||||
h0 += (h4 >> 26) * 5; h4 = h4 & 0x3ffffff;
|
||||
h1 += (h0 >> 26); h0 = h0 & 0x3ffffff;
|
||||
|
||||
/* compute h + -p */
|
||||
g0 = h0 + 5;
|
||||
g1 = h1 + (g0 >> 26); g0 &= 0x3ffffff;
|
||||
g2 = h2 + (g1 >> 26); g1 &= 0x3ffffff;
|
||||
g3 = h3 + (g2 >> 26); g2 &= 0x3ffffff;
|
||||
g4 = h4 + (g3 >> 26) - (1 << 26); g3 &= 0x3ffffff;
|
||||
|
||||
/* select h if h < p, or h + -p if h >= p */
|
||||
mask = (g4 >> ((sizeof(u32) * 8) - 1)) - 1;
|
||||
g0 &= mask;
|
||||
g1 &= mask;
|
||||
g2 &= mask;
|
||||
g3 &= mask;
|
||||
g4 &= mask;
|
||||
mask = ~mask;
|
||||
h0 = (h0 & mask) | g0;
|
||||
h1 = (h1 & mask) | g1;
|
||||
h2 = (h2 & mask) | g2;
|
||||
h3 = (h3 & mask) | g3;
|
||||
h4 = (h4 & mask) | g4;
|
||||
|
||||
/* h = h % (2^128) */
|
||||
put_unaligned_le32((h0 >> 0) | (h1 << 26), dst + 0);
|
||||
put_unaligned_le32((h1 >> 6) | (h2 << 20), dst + 4);
|
||||
put_unaligned_le32((h2 >> 12) | (h3 << 14), dst + 8);
|
||||
put_unaligned_le32((h3 >> 18) | (h4 << 8), dst + 12);
|
||||
poly1305_init_x86_64(ctx, key);
|
||||
}
|
||||
|
||||
void poly1305_init_arch(struct poly1305_desc_ctx *desc, const u8 *key)
|
||||
static void poly1305_simd_blocks(void *ctx, const u8 *inp, size_t len,
|
||||
const u32 padbit)
|
||||
{
|
||||
poly1305_integer_setkey(desc->opaque_r, key);
|
||||
desc->s[0] = get_unaligned_le32(key + 16);
|
||||
desc->s[1] = get_unaligned_le32(key + 20);
|
||||
desc->s[2] = get_unaligned_le32(key + 24);
|
||||
desc->s[3] = get_unaligned_le32(key + 28);
|
||||
poly1305_core_init(&desc->h);
|
||||
desc->buflen = 0;
|
||||
desc->sset = true;
|
||||
desc->rset = 1;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(poly1305_init_arch);
|
||||
struct poly1305_arch_internal *state = ctx;
|
||||
|
||||
static unsigned int crypto_poly1305_setdesckey(struct poly1305_desc_ctx *dctx,
|
||||
const u8 *src, unsigned int srclen)
|
||||
/* SIMD disables preemption, so relax after processing each page. */
|
||||
BUILD_BUG_ON(PAGE_SIZE < POLY1305_BLOCK_SIZE ||
|
||||
PAGE_SIZE % POLY1305_BLOCK_SIZE);
|
||||
|
||||
if (!IS_ENABLED(CONFIG_AS_AVX) || !static_branch_likely(&poly1305_use_avx) ||
|
||||
(len < (POLY1305_BLOCK_SIZE * 18) && !state->is_base2_26) ||
|
||||
!crypto_simd_usable()) {
|
||||
convert_to_base2_64(ctx);
|
||||
poly1305_blocks_x86_64(ctx, inp, len, padbit);
|
||||
return;
|
||||
}
|
||||
|
||||
for (;;) {
|
||||
const size_t bytes = min_t(size_t, len, PAGE_SIZE);
|
||||
|
||||
kernel_fpu_begin();
|
||||
if (IS_ENABLED(CONFIG_AS_AVX512) && static_branch_likely(&poly1305_use_avx512))
|
||||
poly1305_blocks_avx512(ctx, inp, bytes, padbit);
|
||||
else if (IS_ENABLED(CONFIG_AS_AVX2) && static_branch_likely(&poly1305_use_avx2))
|
||||
poly1305_blocks_avx2(ctx, inp, bytes, padbit);
|
||||
else
|
||||
poly1305_blocks_avx(ctx, inp, bytes, padbit);
|
||||
kernel_fpu_end();
|
||||
len -= bytes;
|
||||
if (!len)
|
||||
break;
|
||||
inp += bytes;
|
||||
}
|
||||
}
|
||||
|
||||
static void poly1305_simd_emit(void *ctx, u8 mac[POLY1305_DIGEST_SIZE],
|
||||
const u32 nonce[4])
|
||||
{
|
||||
if (!dctx->sset) {
|
||||
if (!dctx->rset && srclen >= POLY1305_BLOCK_SIZE) {
|
||||
poly1305_integer_setkey(dctx->r, src);
|
||||
src += POLY1305_BLOCK_SIZE;
|
||||
srclen -= POLY1305_BLOCK_SIZE;
|
||||
struct poly1305_arch_internal *state = ctx;
|
||||
|
||||
if (!IS_ENABLED(CONFIG_AS_AVX) || !static_branch_likely(&poly1305_use_avx) ||
|
||||
!state->is_base2_26 || !crypto_simd_usable()) {
|
||||
convert_to_base2_64(ctx);
|
||||
poly1305_emit_x86_64(ctx, mac, nonce);
|
||||
} else
|
||||
poly1305_emit_avx(ctx, mac, nonce);
|
||||
}
|
||||
|
||||
void poly1305_init_arch(struct poly1305_desc_ctx *dctx, const u8 *key)
|
||||
{
|
||||
poly1305_simd_init(&dctx->h, key);
|
||||
dctx->s[0] = get_unaligned_le32(&key[16]);
|
||||
dctx->s[1] = get_unaligned_le32(&key[20]);
|
||||
dctx->s[2] = get_unaligned_le32(&key[24]);
|
||||
dctx->s[3] = get_unaligned_le32(&key[28]);
|
||||
dctx->buflen = 0;
|
||||
dctx->sset = true;
|
||||
}
|
||||
EXPORT_SYMBOL(poly1305_init_arch);
|
||||
|
||||
static unsigned int crypto_poly1305_setdctxkey(struct poly1305_desc_ctx *dctx,
|
||||
const u8 *inp, unsigned int len)
|
||||
{
|
||||
unsigned int acc = 0;
|
||||
if (unlikely(!dctx->sset)) {
|
||||
if (!dctx->rset && len >= POLY1305_BLOCK_SIZE) {
|
||||
poly1305_simd_init(&dctx->h, inp);
|
||||
inp += POLY1305_BLOCK_SIZE;
|
||||
len -= POLY1305_BLOCK_SIZE;
|
||||
acc += POLY1305_BLOCK_SIZE;
|
||||
dctx->rset = 1;
|
||||
}
|
||||
if (srclen >= POLY1305_BLOCK_SIZE) {
|
||||
dctx->s[0] = get_unaligned_le32(src + 0);
|
||||
dctx->s[1] = get_unaligned_le32(src + 4);
|
||||
dctx->s[2] = get_unaligned_le32(src + 8);
|
||||
dctx->s[3] = get_unaligned_le32(src + 12);
|
||||
src += POLY1305_BLOCK_SIZE;
|
||||
srclen -= POLY1305_BLOCK_SIZE;
|
||||
if (len >= POLY1305_BLOCK_SIZE) {
|
||||
dctx->s[0] = get_unaligned_le32(&inp[0]);
|
||||
dctx->s[1] = get_unaligned_le32(&inp[4]);
|
||||
dctx->s[2] = get_unaligned_le32(&inp[8]);
|
||||
dctx->s[3] = get_unaligned_le32(&inp[12]);
|
||||
inp += POLY1305_BLOCK_SIZE;
|
||||
len -= POLY1305_BLOCK_SIZE;
|
||||
acc += POLY1305_BLOCK_SIZE;
|
||||
dctx->sset = true;
|
||||
}
|
||||
}
|
||||
return srclen;
|
||||
}
|
||||
|
||||
static unsigned int poly1305_scalar_blocks(struct poly1305_desc_ctx *dctx,
|
||||
const u8 *src, unsigned int srclen)
|
||||
{
|
||||
unsigned int datalen;
|
||||
|
||||
if (unlikely(!dctx->sset)) {
|
||||
datalen = crypto_poly1305_setdesckey(dctx, src, srclen);
|
||||
src += srclen - datalen;
|
||||
srclen = datalen;
|
||||
}
|
||||
if (srclen >= POLY1305_BLOCK_SIZE) {
|
||||
poly1305_integer_blocks(&dctx->h, dctx->opaque_r, src,
|
||||
srclen / POLY1305_BLOCK_SIZE, 1);
|
||||
srclen %= POLY1305_BLOCK_SIZE;
|
||||
}
|
||||
return srclen;
|
||||
}
|
||||
|
||||
static unsigned int poly1305_simd_blocks(struct poly1305_desc_ctx *dctx,
|
||||
const u8 *src, unsigned int srclen)
|
||||
{
|
||||
unsigned int blocks, datalen;
|
||||
|
||||
if (unlikely(!dctx->sset)) {
|
||||
datalen = crypto_poly1305_setdesckey(dctx, src, srclen);
|
||||
src += srclen - datalen;
|
||||
srclen = datalen;
|
||||
}
|
||||
|
||||
if (IS_ENABLED(CONFIG_AS_AVX2) &&
|
||||
static_branch_likely(&poly1305_use_avx2) &&
|
||||
srclen >= POLY1305_BLOCK_SIZE * 4) {
|
||||
if (unlikely(dctx->rset < 4)) {
|
||||
if (dctx->rset < 2) {
|
||||
dctx->r[1] = dctx->r[0];
|
||||
poly1305_simd_mult(dctx->r[1].r, dctx->r[0].r);
|
||||
}
|
||||
dctx->r[2] = dctx->r[1];
|
||||
poly1305_simd_mult(dctx->r[2].r, dctx->r[0].r);
|
||||
dctx->r[3] = dctx->r[2];
|
||||
poly1305_simd_mult(dctx->r[3].r, dctx->r[0].r);
|
||||
dctx->rset = 4;
|
||||
}
|
||||
blocks = srclen / (POLY1305_BLOCK_SIZE * 4);
|
||||
poly1305_4block_avx2(dctx->h.h, src, dctx->r[0].r, blocks,
|
||||
dctx->r[1].r);
|
||||
src += POLY1305_BLOCK_SIZE * 4 * blocks;
|
||||
srclen -= POLY1305_BLOCK_SIZE * 4 * blocks;
|
||||
}
|
||||
|
||||
if (likely(srclen >= POLY1305_BLOCK_SIZE * 2)) {
|
||||
if (unlikely(dctx->rset < 2)) {
|
||||
dctx->r[1] = dctx->r[0];
|
||||
poly1305_simd_mult(dctx->r[1].r, dctx->r[0].r);
|
||||
dctx->rset = 2;
|
||||
}
|
||||
blocks = srclen / (POLY1305_BLOCK_SIZE * 2);
|
||||
poly1305_2block_sse2(dctx->h.h, src, dctx->r[0].r,
|
||||
blocks, dctx->r[1].r);
|
||||
src += POLY1305_BLOCK_SIZE * 2 * blocks;
|
||||
srclen -= POLY1305_BLOCK_SIZE * 2 * blocks;
|
||||
}
|
||||
if (srclen >= POLY1305_BLOCK_SIZE) {
|
||||
poly1305_block_sse2(dctx->h.h, src, dctx->r[0].r, 1);
|
||||
srclen -= POLY1305_BLOCK_SIZE;
|
||||
}
|
||||
return srclen;
|
||||
return acc;
|
||||
}
|
||||
|
||||
void poly1305_update_arch(struct poly1305_desc_ctx *dctx, const u8 *src,
|
||||
unsigned int srclen)
|
||||
{
|
||||
unsigned int bytes;
|
||||
unsigned int bytes, used;
|
||||
|
||||
if (unlikely(dctx->buflen)) {
|
||||
bytes = min(srclen, POLY1305_BLOCK_SIZE - dctx->buflen);
|
||||
@ -295,31 +184,19 @@ void poly1305_update_arch(struct poly1305_desc_ctx *dctx, const u8 *src,
|
||||
dctx->buflen += bytes;
|
||||
|
||||
if (dctx->buflen == POLY1305_BLOCK_SIZE) {
|
||||
if (static_branch_likely(&poly1305_use_simd) &&
|
||||
likely(crypto_simd_usable())) {
|
||||
kernel_fpu_begin();
|
||||
poly1305_simd_blocks(dctx, dctx->buf,
|
||||
POLY1305_BLOCK_SIZE);
|
||||
kernel_fpu_end();
|
||||
} else {
|
||||
poly1305_scalar_blocks(dctx, dctx->buf,
|
||||
POLY1305_BLOCK_SIZE);
|
||||
}
|
||||
if (likely(!crypto_poly1305_setdctxkey(dctx, dctx->buf, POLY1305_BLOCK_SIZE)))
|
||||
poly1305_simd_blocks(&dctx->h, dctx->buf, POLY1305_BLOCK_SIZE, 1);
|
||||
dctx->buflen = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if (likely(srclen >= POLY1305_BLOCK_SIZE)) {
|
||||
if (static_branch_likely(&poly1305_use_simd) &&
|
||||
likely(crypto_simd_usable())) {
|
||||
kernel_fpu_begin();
|
||||
bytes = poly1305_simd_blocks(dctx, src, srclen);
|
||||
kernel_fpu_end();
|
||||
} else {
|
||||
bytes = poly1305_scalar_blocks(dctx, src, srclen);
|
||||
}
|
||||
src += srclen - bytes;
|
||||
srclen = bytes;
|
||||
bytes = round_down(srclen, POLY1305_BLOCK_SIZE);
|
||||
srclen -= bytes;
|
||||
used = crypto_poly1305_setdctxkey(dctx, src, bytes);
|
||||
if (likely(bytes - used))
|
||||
poly1305_simd_blocks(&dctx->h, src + used, bytes - used, 1);
|
||||
src += bytes;
|
||||
}
|
||||
|
||||
if (unlikely(srclen)) {
|
||||
@ -329,31 +206,17 @@ void poly1305_update_arch(struct poly1305_desc_ctx *dctx, const u8 *src,
|
||||
}
|
||||
EXPORT_SYMBOL(poly1305_update_arch);
|
||||
|
||||
void poly1305_final_arch(struct poly1305_desc_ctx *desc, u8 *dst)
|
||||
void poly1305_final_arch(struct poly1305_desc_ctx *dctx, u8 *dst)
|
||||
{
|
||||
__le32 digest[4];
|
||||
u64 f = 0;
|
||||
|
||||
if (unlikely(desc->buflen)) {
|
||||
desc->buf[desc->buflen++] = 1;
|
||||
memset(desc->buf + desc->buflen, 0,
|
||||
POLY1305_BLOCK_SIZE - desc->buflen);
|
||||
poly1305_integer_blocks(&desc->h, desc->opaque_r, desc->buf, 1, 0);
|
||||
if (unlikely(dctx->buflen)) {
|
||||
dctx->buf[dctx->buflen++] = 1;
|
||||
memset(dctx->buf + dctx->buflen, 0,
|
||||
POLY1305_BLOCK_SIZE - dctx->buflen);
|
||||
poly1305_simd_blocks(&dctx->h, dctx->buf, POLY1305_BLOCK_SIZE, 0);
|
||||
}
|
||||
|
||||
poly1305_integer_emit(&desc->h, digest);
|
||||
|
||||
/* mac = (h + s) % (2^128) */
|
||||
f = (f >> 32) + le32_to_cpu(digest[0]) + desc->s[0];
|
||||
put_unaligned_le32(f, dst + 0);
|
||||
f = (f >> 32) + le32_to_cpu(digest[1]) + desc->s[1];
|
||||
put_unaligned_le32(f, dst + 4);
|
||||
f = (f >> 32) + le32_to_cpu(digest[2]) + desc->s[2];
|
||||
put_unaligned_le32(f, dst + 8);
|
||||
f = (f >> 32) + le32_to_cpu(digest[3]) + desc->s[3];
|
||||
put_unaligned_le32(f, dst + 12);
|
||||
|
||||
*desc = (struct poly1305_desc_ctx){};
|
||||
poly1305_simd_emit(&dctx->h, dst, dctx->s);
|
||||
*dctx = (struct poly1305_desc_ctx){};
|
||||
}
|
||||
EXPORT_SYMBOL(poly1305_final_arch);
|
||||
|
||||
@ -361,11 +224,16 @@ static int crypto_poly1305_init(struct shash_desc *desc)
|
||||
{
|
||||
struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
|
||||
|
||||
poly1305_core_init(&dctx->h);
|
||||
dctx->buflen = 0;
|
||||
dctx->rset = 0;
|
||||
dctx->sset = false;
|
||||
*dctx = (struct poly1305_desc_ctx){};
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int crypto_poly1305_update(struct shash_desc *desc,
|
||||
const u8 *src, unsigned int srclen)
|
||||
{
|
||||
struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
|
||||
|
||||
poly1305_update_arch(dctx, src, srclen);
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -380,19 +248,10 @@ static int crypto_poly1305_final(struct shash_desc *desc, u8 *dst)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int poly1305_simd_update(struct shash_desc *desc,
|
||||
const u8 *src, unsigned int srclen)
|
||||
{
|
||||
struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
|
||||
|
||||
poly1305_update_arch(dctx, src, srclen);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct shash_alg alg = {
|
||||
.digestsize = POLY1305_DIGEST_SIZE,
|
||||
.init = crypto_poly1305_init,
|
||||
.update = poly1305_simd_update,
|
||||
.update = crypto_poly1305_update,
|
||||
.final = crypto_poly1305_final,
|
||||
.descsize = sizeof(struct poly1305_desc_ctx),
|
||||
.base = {
|
||||
@ -406,17 +265,19 @@ static struct shash_alg alg = {
|
||||
|
||||
static int __init poly1305_simd_mod_init(void)
|
||||
{
|
||||
if (!boot_cpu_has(X86_FEATURE_XMM2))
|
||||
return 0;
|
||||
|
||||
static_branch_enable(&poly1305_use_simd);
|
||||
|
||||
if (IS_ENABLED(CONFIG_AS_AVX2) &&
|
||||
boot_cpu_has(X86_FEATURE_AVX) &&
|
||||
if (IS_ENABLED(CONFIG_AS_AVX) && boot_cpu_has(X86_FEATURE_AVX) &&
|
||||
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
|
||||
static_branch_enable(&poly1305_use_avx);
|
||||
if (IS_ENABLED(CONFIG_AS_AVX2) && boot_cpu_has(X86_FEATURE_AVX) &&
|
||||
boot_cpu_has(X86_FEATURE_AVX2) &&
|
||||
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
|
||||
static_branch_enable(&poly1305_use_avx2);
|
||||
|
||||
if (IS_ENABLED(CONFIG_AS_AVX512) && boot_cpu_has(X86_FEATURE_AVX) &&
|
||||
boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX512F) &&
|
||||
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | XFEATURE_MASK_AVX512, NULL) &&
|
||||
/* Skylake downclocks unacceptably much when using zmm, but later generations are fast. */
|
||||
boot_cpu_data.x86_model != INTEL_FAM6_SKYLAKE_X)
|
||||
static_branch_enable(&poly1305_use_avx512);
|
||||
return IS_REACHABLE(CONFIG_CRYPTO_HASH) ? crypto_register_shash(&alg) : 0;
|
||||
}
|
||||
|
||||
@ -430,7 +291,7 @@ module_init(poly1305_simd_mod_init);
|
||||
module_exit(poly1305_simd_mod_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Martin Willi <martin@strongswan.org>");
|
||||
MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");
|
||||
MODULE_DESCRIPTION("Poly1305 authenticator");
|
||||
MODULE_ALIAS_CRYPTO("poly1305");
|
||||
MODULE_ALIAS_CRYPTO("poly1305-simd");
|
||||
|
||||
@ -90,7 +90,7 @@ config CRYPTO_LIB_DES
|
||||
config CRYPTO_LIB_POLY1305_RSIZE
|
||||
int
|
||||
default 2 if MIPS
|
||||
default 4 if X86_64
|
||||
default 11 if X86_64
|
||||
default 9 if ARM || ARM64
|
||||
default 1
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user