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linux/arch/x86/crypto/aegis128l-aesni-asm.S
Ondrej Mosnacek 1d373d4e8e crypto: x86 - Add optimized AEGIS implementations 
This patch adds optimized implementations of AEGIS-128, AEGIS-128L,
and AEGIS-256, utilizing the AES-NI and SSE2 x86 extensions.

Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-19 00:14:00 +08:00

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/*
* AES-NI + SSE2 implementation of AEGIS-128L
*
* Copyright (c) 2017-2018 Ondrej Mosnacek <omosnacek@gmail.com>
* Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/linkage.h>
#include <asm/frame.h>
#define STATE0 %xmm0
#define STATE1 %xmm1
#define STATE2 %xmm2
#define STATE3 %xmm3
#define STATE4 %xmm4
#define STATE5 %xmm5
#define STATE6 %xmm6
#define STATE7 %xmm7
#define MSG0 %xmm8
#define MSG1 %xmm9
#define T0 %xmm10
#define T1 %xmm11
#define T2 %xmm12
#define T3 %xmm13
#define STATEP %rdi
#define LEN %rsi
#define SRC %rdx
#define DST %rcx
.section .rodata.cst16.aegis128l_const, "aM", @progbits, 32
.align 16
.Laegis128l_const_0:
.byte 0x00, 0x01, 0x01, 0x02, 0x03, 0x05, 0x08, 0x0d
.byte 0x15, 0x22, 0x37, 0x59, 0x90, 0xe9, 0x79, 0x62
.Laegis128l_const_1:
.byte 0xdb, 0x3d, 0x18, 0x55, 0x6d, 0xc2, 0x2f, 0xf1
.byte 0x20, 0x11, 0x31, 0x42, 0x73, 0xb5, 0x28, 0xdd
.section .rodata.cst16.aegis128l_counter, "aM", @progbits, 16
.align 16
.Laegis128l_counter0:
.byte 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07
.byte 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f
.Laegis128l_counter1:
.byte 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17
.byte 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
.text
/*
* __load_partial: internal ABI
* input:
* LEN - bytes
* SRC - src
* output:
* MSG0 - first message block
* MSG1 - second message block
* changed:
* T0
* %r8
* %r9
*/
__load_partial:
xor %r9, %r9
pxor MSG0, MSG0
pxor MSG1, MSG1
mov LEN, %r8
and $0x1, %r8
jz .Lld_partial_1
mov LEN, %r8
and $0x1E, %r8
add SRC, %r8
mov (%r8), %r9b
.Lld_partial_1:
mov LEN, %r8
and $0x2, %r8
jz .Lld_partial_2
mov LEN, %r8
and $0x1C, %r8
add SRC, %r8
shl $0x10, %r9
mov (%r8), %r9w
.Lld_partial_2:
mov LEN, %r8
and $0x4, %r8
jz .Lld_partial_4
mov LEN, %r8
and $0x18, %r8
add SRC, %r8
shl $32, %r9
mov (%r8), %r8d
xor %r8, %r9
.Lld_partial_4:
movq %r9, MSG0
mov LEN, %r8
and $0x8, %r8
jz .Lld_partial_8
mov LEN, %r8
and $0x10, %r8
add SRC, %r8
pslldq $8, MSG0
movq (%r8), T0
pxor T0, MSG0
.Lld_partial_8:
mov LEN, %r8
and $0x10, %r8
jz .Lld_partial_16
movdqa MSG0, MSG1
movdqu (SRC), MSG0
.Lld_partial_16:
ret
ENDPROC(__load_partial)
/*
* __store_partial: internal ABI
* input:
* LEN - bytes
* DST - dst
* output:
* T0 - first message block
* T1 - second message block
* changed:
* %r8
* %r9
* %r10
*/
__store_partial:
mov LEN, %r8
mov DST, %r9
cmp $16, %r8
jl .Lst_partial_16
movdqu T0, (%r9)
movdqa T1, T0
sub $16, %r8
add $16, %r9
.Lst_partial_16:
movq T0, %r10
cmp $8, %r8
jl .Lst_partial_8
mov %r10, (%r9)
psrldq $8, T0
movq T0, %r10
sub $8, %r8
add $8, %r9
.Lst_partial_8:
cmp $4, %r8
jl .Lst_partial_4
mov %r10d, (%r9)
shr $32, %r10
sub $4, %r8
add $4, %r9
.Lst_partial_4:
cmp $2, %r8
jl .Lst_partial_2
mov %r10w, (%r9)
shr $0x10, %r10
sub $2, %r8
add $2, %r9
.Lst_partial_2:
cmp $1, %r8
jl .Lst_partial_1
mov %r10b, (%r9)
.Lst_partial_1:
ret
ENDPROC(__store_partial)
.macro update
movdqa STATE7, T0
aesenc STATE0, STATE7
aesenc STATE1, STATE0
aesenc STATE2, STATE1
aesenc STATE3, STATE2
aesenc STATE4, STATE3
aesenc STATE5, STATE4
aesenc STATE6, STATE5
aesenc T0, STATE6
.endm
.macro update0
update
pxor MSG0, STATE7
pxor MSG1, STATE3
.endm
.macro update1
update
pxor MSG0, STATE6
pxor MSG1, STATE2
.endm
.macro update2
update
pxor MSG0, STATE5
pxor MSG1, STATE1
.endm
.macro update3
update
pxor MSG0, STATE4
pxor MSG1, STATE0
.endm
.macro update4
update
pxor MSG0, STATE3
pxor MSG1, STATE7
.endm
.macro update5
update
pxor MSG0, STATE2
pxor MSG1, STATE6
.endm
.macro update6
update
pxor MSG0, STATE1
pxor MSG1, STATE5
.endm
.macro update7
update
pxor MSG0, STATE0
pxor MSG1, STATE4
.endm
.macro state_load
movdqu 0x00(STATEP), STATE0
movdqu 0x10(STATEP), STATE1
movdqu 0x20(STATEP), STATE2
movdqu 0x30(STATEP), STATE3
movdqu 0x40(STATEP), STATE4
movdqu 0x50(STATEP), STATE5
movdqu 0x60(STATEP), STATE6
movdqu 0x70(STATEP), STATE7
.endm
.macro state_store s0 s1 s2 s3 s4 s5 s6 s7
movdqu \s7, 0x00(STATEP)
movdqu \s0, 0x10(STATEP)
movdqu \s1, 0x20(STATEP)
movdqu \s2, 0x30(STATEP)
movdqu \s3, 0x40(STATEP)
movdqu \s4, 0x50(STATEP)
movdqu \s5, 0x60(STATEP)
movdqu \s6, 0x70(STATEP)
.endm
.macro state_store0
state_store STATE0 STATE1 STATE2 STATE3 STATE4 STATE5 STATE6 STATE7
.endm
.macro state_store1
state_store STATE7 STATE0 STATE1 STATE2 STATE3 STATE4 STATE5 STATE6
.endm
.macro state_store2
state_store STATE6 STATE7 STATE0 STATE1 STATE2 STATE3 STATE4 STATE5
.endm
.macro state_store3
state_store STATE5 STATE6 STATE7 STATE0 STATE1 STATE2 STATE3 STATE4
.endm
.macro state_store4
state_store STATE4 STATE5 STATE6 STATE7 STATE0 STATE1 STATE2 STATE3
.endm
.macro state_store5
state_store STATE3 STATE4 STATE5 STATE6 STATE7 STATE0 STATE1 STATE2
.endm
.macro state_store6
state_store STATE2 STATE3 STATE4 STATE5 STATE6 STATE7 STATE0 STATE1
.endm
.macro state_store7
state_store STATE1 STATE2 STATE3 STATE4 STATE5 STATE6 STATE7 STATE0
.endm
/*
* void crypto_aegis128l_aesni_init(void *state, const void *key, const void *iv);
*/
ENTRY(crypto_aegis128l_aesni_init)
FRAME_BEGIN
/* load key: */
movdqa (%rsi), MSG1
movdqa MSG1, STATE0
movdqa MSG1, STATE4
movdqa MSG1, STATE5
movdqa MSG1, STATE6
movdqa MSG1, STATE7
/* load IV: */
movdqu (%rdx), MSG0
pxor MSG0, STATE0
pxor MSG0, STATE4
/* load the constants: */
movdqa .Laegis128l_const_0, STATE2
movdqa .Laegis128l_const_1, STATE1
movdqa STATE1, STATE3
pxor STATE2, STATE5
pxor STATE1, STATE6
pxor STATE2, STATE7
/* update 10 times with IV and KEY: */
update0
update1
update2
update3
update4
update5
update6
update7
update0
update1
state_store1
FRAME_END
ret
ENDPROC(crypto_aegis128l_aesni_init)
.macro ad_block a i
movdq\a (\i * 0x20 + 0x00)(SRC), MSG0
movdq\a (\i * 0x20 + 0x10)(SRC), MSG1
update\i
sub $0x20, LEN
cmp $0x20, LEN
jl .Lad_out_\i
.endm
/*
* void crypto_aegis128l_aesni_ad(void *state, unsigned int length,
* const void *data);
*/
ENTRY(crypto_aegis128l_aesni_ad)
FRAME_BEGIN
cmp $0x20, LEN
jb .Lad_out
state_load
mov SRC, %r8
and $0xf, %r8
jnz .Lad_u_loop
.align 8
.Lad_a_loop:
ad_block a 0
ad_block a 1
ad_block a 2
ad_block a 3
ad_block a 4
ad_block a 5
ad_block a 6
ad_block a 7
add $0x100, SRC
jmp .Lad_a_loop
.align 8
.Lad_u_loop:
ad_block u 0
ad_block u 1
ad_block u 2
ad_block u 3
ad_block u 4
ad_block u 5
ad_block u 6
ad_block u 7
add $0x100, SRC
jmp .Lad_u_loop
.Lad_out_0:
state_store0
FRAME_END
ret
.Lad_out_1:
state_store1
FRAME_END
ret
.Lad_out_2:
state_store2
FRAME_END
ret
.Lad_out_3:
state_store3
FRAME_END
ret
.Lad_out_4:
state_store4
FRAME_END
ret
.Lad_out_5:
state_store5
FRAME_END
ret
.Lad_out_6:
state_store6
FRAME_END
ret
.Lad_out_7:
state_store7
FRAME_END
ret
.Lad_out:
FRAME_END
ret
ENDPROC(crypto_aegis128l_aesni_ad)
.macro crypt m0 m1 s0 s1 s2 s3 s4 s5 s6 s7
pxor \s1, \m0
pxor \s6, \m0
movdqa \s2, T3
pand \s3, T3
pxor T3, \m0
pxor \s2, \m1
pxor \s5, \m1
movdqa \s6, T3
pand \s7, T3
pxor T3, \m1
.endm
.macro crypt0 m0 m1
crypt \m0 \m1 STATE0 STATE1 STATE2 STATE3 STATE4 STATE5 STATE6 STATE7
.endm
.macro crypt1 m0 m1
crypt \m0 \m1 STATE7 STATE0 STATE1 STATE2 STATE3 STATE4 STATE5 STATE6
.endm
.macro crypt2 m0 m1
crypt \m0 \m1 STATE6 STATE7 STATE0 STATE1 STATE2 STATE3 STATE4 STATE5
.endm
.macro crypt3 m0 m1
crypt \m0 \m1 STATE5 STATE6 STATE7 STATE0 STATE1 STATE2 STATE3 STATE4
.endm
.macro crypt4 m0 m1
crypt \m0 \m1 STATE4 STATE5 STATE6 STATE7 STATE0 STATE1 STATE2 STATE3
.endm
.macro crypt5 m0 m1
crypt \m0 \m1 STATE3 STATE4 STATE5 STATE6 STATE7 STATE0 STATE1 STATE2
.endm
.macro crypt6 m0 m1
crypt \m0 \m1 STATE2 STATE3 STATE4 STATE5 STATE6 STATE7 STATE0 STATE1
.endm
.macro crypt7 m0 m1
crypt \m0 \m1 STATE1 STATE2 STATE3 STATE4 STATE5 STATE6 STATE7 STATE0
.endm
.macro encrypt_block a i
movdq\a (\i * 0x20 + 0x00)(SRC), MSG0
movdq\a (\i * 0x20 + 0x10)(SRC), MSG1
movdqa MSG0, T0
movdqa MSG1, T1
crypt\i T0, T1
movdq\a T0, (\i * 0x20 + 0x00)(DST)
movdq\a T1, (\i * 0x20 + 0x10)(DST)
update\i
sub $0x20, LEN
cmp $0x20, LEN
jl .Lenc_out_\i
.endm
.macro decrypt_block a i
movdq\a (\i * 0x20 + 0x00)(SRC), MSG0
movdq\a (\i * 0x20 + 0x10)(SRC), MSG1
crypt\i MSG0, MSG1
movdq\a MSG0, (\i * 0x20 + 0x00)(DST)
movdq\a MSG1, (\i * 0x20 + 0x10)(DST)
update\i
sub $0x20, LEN
cmp $0x20, LEN
jl .Ldec_out_\i
.endm
/*
* void crypto_aegis128l_aesni_enc(void *state, unsigned int length,
* const void *src, void *dst);
*/
ENTRY(crypto_aegis128l_aesni_enc)
FRAME_BEGIN
cmp $0x20, LEN
jb .Lenc_out
state_load
mov SRC, %r8
or DST, %r8
and $0xf, %r8
jnz .Lenc_u_loop
.align 8
.Lenc_a_loop:
encrypt_block a 0
encrypt_block a 1
encrypt_block a 2
encrypt_block a 3
encrypt_block a 4
encrypt_block a 5
encrypt_block a 6
encrypt_block a 7
add $0x100, SRC
add $0x100, DST
jmp .Lenc_a_loop
.align 8
.Lenc_u_loop:
encrypt_block u 0
encrypt_block u 1
encrypt_block u 2
encrypt_block u 3
encrypt_block u 4
encrypt_block u 5
encrypt_block u 6
encrypt_block u 7
add $0x100, SRC
add $0x100, DST
jmp .Lenc_u_loop
.Lenc_out_0:
state_store0
FRAME_END
ret
.Lenc_out_1:
state_store1
FRAME_END
ret
.Lenc_out_2:
state_store2
FRAME_END
ret
.Lenc_out_3:
state_store3
FRAME_END
ret
.Lenc_out_4:
state_store4
FRAME_END
ret
.Lenc_out_5:
state_store5
FRAME_END
ret
.Lenc_out_6:
state_store6
FRAME_END
ret
.Lenc_out_7:
state_store7
FRAME_END
ret
.Lenc_out:
FRAME_END
ret
ENDPROC(crypto_aegis128l_aesni_enc)
/*
* void crypto_aegis128l_aesni_enc_tail(void *state, unsigned int length,
* const void *src, void *dst);
*/
ENTRY(crypto_aegis128l_aesni_enc_tail)
FRAME_BEGIN
state_load
/* encrypt message: */
call __load_partial
movdqa MSG0, T0
movdqa MSG1, T1
crypt0 T0, T1
call __store_partial
update0
state_store0
FRAME_END
ENDPROC(crypto_aegis128l_aesni_enc_tail)
/*
* void crypto_aegis128l_aesni_dec(void *state, unsigned int length,
* const void *src, void *dst);
*/
ENTRY(crypto_aegis128l_aesni_dec)
FRAME_BEGIN
cmp $0x20, LEN
jb .Ldec_out
state_load
mov SRC, %r8
or DST, %r8
and $0xF, %r8
jnz .Ldec_u_loop
.align 8
.Ldec_a_loop:
decrypt_block a 0
decrypt_block a 1
decrypt_block a 2
decrypt_block a 3
decrypt_block a 4
decrypt_block a 5
decrypt_block a 6
decrypt_block a 7
add $0x100, SRC
add $0x100, DST
jmp .Ldec_a_loop
.align 8
.Ldec_u_loop:
decrypt_block u 0
decrypt_block u 1
decrypt_block u 2
decrypt_block u 3
decrypt_block u 4
decrypt_block u 5
decrypt_block u 6
decrypt_block u 7
add $0x100, SRC
add $0x100, DST
jmp .Ldec_u_loop
.Ldec_out_0:
state_store0
FRAME_END
ret
.Ldec_out_1:
state_store1
FRAME_END
ret
.Ldec_out_2:
state_store2
FRAME_END
ret
.Ldec_out_3:
state_store3
FRAME_END
ret
.Ldec_out_4:
state_store4
FRAME_END
ret
.Ldec_out_5:
state_store5
FRAME_END
ret
.Ldec_out_6:
state_store6
FRAME_END
ret
.Ldec_out_7:
state_store7
FRAME_END
ret
.Ldec_out:
FRAME_END
ret
ENDPROC(crypto_aegis128l_aesni_dec)
/*
* void crypto_aegis128l_aesni_dec_tail(void *state, unsigned int length,
* const void *src, void *dst);
*/
ENTRY(crypto_aegis128l_aesni_dec_tail)
FRAME_BEGIN
state_load
/* decrypt message: */
call __load_partial
crypt0 MSG0, MSG1
movdqa MSG0, T0
movdqa MSG1, T1
call __store_partial
/* mask with byte count: */
movq LEN, T0
punpcklbw T0, T0
punpcklbw T0, T0
punpcklbw T0, T0
punpcklbw T0, T0
movdqa T0, T1
movdqa .Laegis128l_counter0, T2
movdqa .Laegis128l_counter1, T3
pcmpgtb T2, T0
pcmpgtb T3, T1
pand T0, MSG0
pand T1, MSG1
update0
state_store0
FRAME_END
ret
ENDPROC(crypto_aegis128l_aesni_dec_tail)
/*
* void crypto_aegis128l_aesni_final(void *state, void *tag_xor,
* u64 assoclen, u64 cryptlen);
*/
ENTRY(crypto_aegis128l_aesni_final)
FRAME_BEGIN
state_load
/* prepare length block: */
movq %rdx, MSG0
movq %rcx, T0
pslldq $8, T0
pxor T0, MSG0
psllq $3, MSG0 /* multiply by 8 (to get bit count) */
pxor STATE2, MSG0
movdqa MSG0, MSG1
/* update state: */
update0
update1
update2
update3
update4
update5
update6
/* xor tag: */
movdqu (%rsi), T0
pxor STATE1, T0
pxor STATE2, T0
pxor STATE3, T0
pxor STATE4, T0
pxor STATE5, T0
pxor STATE6, T0
pxor STATE7, T0
movdqu T0, (%rsi)
FRAME_END
ret
ENDPROC(crypto_aegis128l_aesni_final)
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