########################################################################
# Copyright (c) 2013, Intel Corporation
#
# This software is available to you under a choice of one of two
# licenses. You may choose to be licensed under the terms of the GNU
# General Public License (GPL) Version 2, available from the file
# COPYING in the main directory of this source tree, or the
# OpenIB.org BSD license below:
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the
# distribution.
#
# * Neither the name of the Intel Corporation nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
#
# THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION ""AS IS"" AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES# LOSS OF USE, DATA, OR
# PROFITS# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
########################################################################
##
## Authors:
## Erdinc Ozturk <erdinc.ozturk@intel.com>
## Vinodh Gopal <vinodh.gopal@intel.com>
## James Guilford <james.guilford@intel.com>
## Tim Chen <tim.c.chen@linux.intel.com>
##
## References:
## This code was derived and highly optimized from the code described in paper:
## Vinodh Gopal et. al. Optimized Galois-Counter-Mode Implementation
## on Intel Architecture Processors. August, 2010
## The details of the implementation is explained in:
## Erdinc Ozturk et. al. Enabling High-Performance Galois-Counter-Mode
## on Intel Architecture Processors. October, 2012.
##
## Assumptions:
##
##
##
## iv:
## 0 1 2 3
## 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | Salt (From the SA) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | Initialization Vector |
## | (This is the sequence number from IPSec header) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 0x1 |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
##
##
##
## AAD:
## AAD padded to 128 bits with 0
## for example, assume AAD is a u32 vector
##
## if AAD is 8 bytes:
## AAD[3] = {A0, A1}#
## padded AAD in xmm register = {A1 A0 0 0}
##
## 0 1 2 3
## 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | SPI (A1) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 32-bit Sequence Number (A0) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 0x0 |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
##
## AAD Format with 32-bit Sequence Number
##
## if AAD is 12 bytes:
## AAD[3] = {A0, A1, A2}#
## padded AAD in xmm register = {A2 A1 A0 0}
##
## 0 1 2 3
## 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | SPI (A2) |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 64-bit Extended Sequence Number {A1,A0} |
## | |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
## | 0x0 |
## +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
##
## AAD Format with 64-bit Extended Sequence Number
##
##
## aadLen:
## from the definition of the spec, aadLen can only be 8 or 12 bytes.
## The code additionally supports aadLen of length 16 bytes.
##
## TLen:
## from the definition of the spec, TLen can only be 8, 12 or 16 bytes.
##
## poly = x^128 + x^127 + x^126 + x^121 + 1
## throughout the code, one tab and two tab indentations are used. one tab is
## for GHASH part, two tabs is for AES part.
##
#include <linux/linkage.h>
# constants in mergeable sections, linker can reorder and merge
.section .rodata.cst16.POLY, "aM", @progbits, 16
.align 16
POLY: .octa 0xC2000000000000000000000000000001
.section .rodata.cst16.POLY2, "aM", @progbits, 16
.align 16
POLY2: .octa 0xC20000000000000000000001C2000000
.section .rodata.cst16.TWOONE, "aM", @progbits, 16
.align 16
TWOONE: .octa 0x00000001000000000000000000000001
.section .rodata.cst16.SHUF_MASK, "aM", @progbits, 16
.align 16
SHUF_MASK: .octa 0x000102030405060708090A0B0C0D0E0F
.section .rodata.cst16.ONE, "aM", @progbits, 16
.align 16
ONE: .octa 0x00000000000000000000000000000001
.section .rodata.cst16.ONEf, "aM", @progbits, 16
.align 16
ONEf: .octa 0x01000000000000000000000000000000
# order of these constants should not change.
# more specifically, ALL_F should follow SHIFT_MASK, and zero should follow ALL_F
.section .rodata, "a", @progbits
.align 16
SHIFT_MASK: .octa 0x0f0e0d0c0b0a09080706050403020100
ALL_F: .octa 0xffffffffffffffffffffffffffffffff
.octa 0x00000000000000000000000000000000
.text
#define AadHash 16*0
#define AadLen 16*1
#define InLen (16*1)+8
#define PBlockEncKey 16*2
#define OrigIV 16*3
#define CurCount 16*4
#define PBlockLen 16*5
HashKey = 16*6 # store HashKey <<1 mod poly here
HashKey_2 = 16*7 # store HashKey^2 <<1 mod poly here
HashKey_3 = 16*8 # store HashKey^3 <<1 mod poly here
HashKey_4 = 16*9 # store HashKey^4 <<1 mod poly here
HashKey_5 = 16*10 # store HashKey^5 <<1 mod poly here
HashKey_6 = 16*11 # store HashKey^6 <<1 mod poly here
HashKey_7 = 16*12 # store HashKey^7 <<1 mod poly here
HashKey_8 = 16*13 # store HashKey^8 <<1 mod poly here
HashKey_k = 16*14 # store XOR of HashKey <<1 mod poly here (for Karatsuba purposes)
HashKey_2_k = 16*15 # store XOR of HashKey^2 <<1 mod poly here (for Karatsuba purposes)
HashKey_3_k = 16*16 # store XOR of HashKey^3 <<1 mod poly here (for Karatsuba purposes)
HashKey_4_k = 16*17 # store XOR of HashKey^4 <<1 mod poly here (for Karatsuba purposes)
HashKey_5_k = 16*18 # store XOR of HashKey^5 <<1 mod poly here (for Karatsuba purposes)
HashKey_6_k = 16*19 # store XOR of HashKey^6 <<1 mod poly here (for Karatsuba purposes)
HashKey_7_k = 16*20 # store XOR of HashKey^7 <<1 mod poly here (for Karatsuba purposes)
HashKey_8_k = 16*21 # store XOR of HashKey^8 <<1 mod poly here (for Karatsuba purposes)
#define arg1 %rdi
#define arg2 %rsi
#define arg3 %rdx
#define arg4 %rcx
#define arg5 %r8
#define arg6 %r9
#define keysize 2*15*16(arg1)
i = 0
j = 0
out_order = 0
in_order = 1
DEC = 0
ENC = 1
.macro define_reg r n
reg_\r = %xmm\n
.endm
.macro setreg
.altmacro
define_reg i %i
define_reg j %j
.noaltmacro
.endm
TMP1 = 16*0 # Temporary storage for AAD
TMP2 = 16*1 # Temporary storage for AES State 2 (State 1 is stored in an XMM register)
TMP3 = 16*2 # Temporary storage for AES State 3
TMP4 = 16*3 # Temporary storage for AES State 4
TMP5 = 16*4 # Temporary storage for AES State 5
TMP6 = 16*5 # Temporary storage for AES State 6
TMP7 = 16*6 # Temporary storage for AES State 7
TMP8 = 16*7 # Temporary storage for AES State 8
VARIABLE_OFFSET = 16*8
################################
# Utility Macros
################################
.macro FUNC_SAVE
push %r12
push %r13
push %r15
push %rbp
mov %rsp, %rbp
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp # align rsp to 64 bytes
.endm
.macro FUNC_RESTORE
mov %rbp, %rsp
pop %rbp
pop %r15
pop %r13
pop %r12
.endm
# Encryption of a single block
.macro ENCRYPT_SINGLE_BLOCK REP XMM0
vpxor (arg1), \XMM0, \XMM0
i = 1
setreg
.rep \REP
vaesenc 16*i(arg1), \XMM0, \XMM0
i = (i+1)
setreg
.endr
vaesenclast 16*i(arg1), \XMM0, \XMM0
.endm
# combined for GCM encrypt and decrypt functions
# clobbering all xmm registers
# clobbering r10, r11, r12, r13, r15, rax
.macro GCM_ENC_DEC INITIAL_BLOCKS GHASH_8_ENCRYPT_8_PARALLEL GHASH_LAST_8 GHASH_MUL ENC_DEC REP
vmovdqu AadHash(arg2), %xmm8
vmovdqu HashKey(arg2), %xmm13 # xmm13 = HashKey
add arg5, InLen(arg2)
# initialize the data pointer offset as zero
xor %r11d, %r11d
PARTIAL_BLOCK \GHASH_MUL, arg3, arg4, arg5, %r11, %xmm8, \ENC_DEC
sub %r11, arg5
mov arg5, %r13 # save the number of bytes of plaintext/ciphertext
and $-16, %r13 # r13 = r13 - (r13 mod 16)
mov %r13, %r12
shr $4, %r12
and $7, %r12
jz .L_initial_num_blocks_is_0\@
cmp $7, %r12
je .L_initial_num_blocks_is_7\@
cmp $6, %r12
je .L_initial_num_blocks_is_6\@
cmp $5, %r12
je .L_initial_num_blocks_is_5\@
cmp $4, %r12
je .L_initial_num_blocks_is_4\@
cmp $3, %r12
je .L_initial_num_blocks_is_3\@
cmp $2, %r12
je .L_initial_num_blocks_is_2\@
jmp .L_initial_num_blocks_is_1\@
.L_initial_num_blocks_is_7\@:
\INITIAL_BLOCKS \REP, 7, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*7, %r13
jmp .L_initial_blocks_encrypted\@
.L_initial_num_blocks_is_6\@:
\INITIAL_BLOCKS \REP, 6, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*6, %r13
jmp .L_initial_blocks_encrypted\@
.L_initial_num_blocks_is_5\@:
\INITIAL_BLOCKS \REP, 5, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*5, %r13
jmp .L_initial_blocks_encrypted\@
.L_initial_num_blocks_is_4\@:
\INITIAL_BLOCKS \REP, 4, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*4, %r13
jmp .L_initial_blocks_encrypted\@
.L_initial_num_blocks_is_3\@:
\INITIAL_BLOCKS \REP, 3, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*3, %r13
jmp .L_initial_blocks_encrypted\@
.L_initial_num_blocks_is_2\@:
\INITIAL_BLOCKS \REP, 2, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*2, %r13
jmp .L_initial_blocks_encrypted\@
.L_initial_num_blocks_is_1\@:
\INITIAL_BLOCKS \REP, 1, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
sub $16*1, %r13
jmp .L_initial_blocks_encrypted\@
.L_initial_num_blocks_is_0\@:
\INITIAL_BLOCKS \REP, 0, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC
.L_initial_blocks_encrypted\@:
test %r13, %r13
je .L_zero_cipher_left\@
sub $128, %r13
je .L_eight_cipher_left\@
vmovd %xmm9, %r15d
and $255, %r15d
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
.L_encrypt_by_8_new\@:
cmp $(255-8), %r15d
jg .L_encrypt_by_8\@
add $8, %r15b
\GHASH_8_ENCRYPT_8_PARALLEL \REP, %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, out_order, \ENC_DEC
add $128, %r11
sub $128, %r13
jne .L_encrypt_by_8_new\@
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
jmp .L_eight_cipher_left\@
.L_encrypt_by_8\@:
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
add $8, %r15b
\GHASH_8_ENCRYPT_8_PARALLEL \REP, %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, in_order, \ENC_DEC
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
add $128, %r11
sub $128, %r13
jne .L_encrypt_by_8_new\@
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
.L_eight_cipher_left\@:
\GHASH_LAST_8 %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8
.L_zero_cipher_left\@:
vmovdqu %xmm14, AadHash(arg2)
vmovdqu %xmm9, CurCount(arg2)
# check for 0 length
mov arg5, %r13
and $15, %r13 # r13 = (arg5 mod 16)
je .L_multiple_of_16_bytes\@
# handle the last <16 Byte block separately
mov %r13, PBlockLen(arg2)
vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn
vmovdqu %xmm9, CurCount(arg2)
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
ENCRYPT_SINGLE_BLOCK \REP, %xmm9 # E(K, Yn)
vmovdqu %xmm9, PBlockEncKey(arg2)
cmp $16, arg5
jge .L_large_enough_update\@
lea (arg4,%r11,1), %r10
mov %r13, %r12
READ_PARTIAL_BLOCK %r10 %r12 %xmm1
lea SHIFT_MASK+16(%rip), %r12
sub %r13, %r12 # adjust the shuffle mask pointer to be
# able to shift 16-r13 bytes (r13 is the
# number of bytes in plaintext mod 16)
jmp .L_final_ghash_mul\@
.L_large_enough_update\@:
sub $16, %r11
add %r13, %r11
# receive the last <16 Byte block
vmovdqu (arg4, %r11, 1), %xmm1
sub %r13, %r11
add $16, %r11
lea SHIFT_MASK+16(%rip), %r12
# adjust the shuffle mask pointer to be able to shift 16-r13 bytes
# (r13 is the number of bytes in plaintext mod 16)
sub %r13, %r12
# get the appropriate shuffle mask
vmovdqu (%r12), %xmm2
# shift right 16-r13 bytes
vpshufb %xmm2, %xmm1, %xmm1
.L_final_ghash_mul\@:
.if \ENC_DEC == DEC
vmovdqa %xmm1, %xmm2
vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn)
vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to
# mask out top 16-r13 bytes of xmm9
vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9
vpand %xmm1, %xmm2, %xmm2
vpshufb SHUF_MASK(%rip), %xmm2, %xmm2
vpxor %xmm2, %xmm14, %xmm14
vmovdqu %xmm14, AadHash(arg2)
.else
vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn)
vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to
# mask out top 16-r13 bytes of xmm9
vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
vpxor %xmm9, %xmm14, %xmm14
vmovdqu %xmm14, AadHash(arg2)
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 # shuffle xmm9 back to output as ciphertext
.endif
#############################
# output r13 Bytes
vmovq %xmm9, %rax
cmp $8, %r13
jle .L_less_than_8_bytes_left\@
mov %rax, (arg3 , %r11)
add $8, %r11
vpsrldq $8, %xmm9, %xmm9
vmovq %xmm9, %rax
sub $8, %r13
.L_less_than_8_bytes_left\@:
movb %al, (arg3 , %r11)
add $1, %r11
shr $8, %rax
sub $1, %r13
jne .L_less_than_8_bytes_left\@
#############################
.L_multiple_of_16_bytes\@:
.endm
# GCM_COMPLETE Finishes update of tag of last partial block
# Output: Authorization Tag (AUTH_TAG)
# Clobbers rax, r10-r12, and xmm0, xmm1, xmm5-xmm15
.macro GCM_COMPLETE GHASH_MUL REP AUTH_TAG AUTH_TAG_LEN
vmovdqu AadHash(arg2), %xmm14
vmovdqu HashKey(arg2), %xmm13
mov PBlockLen(arg2), %r12
test %r12, %r12
je .L_partial_done\@
#GHASH computation for the last <16 Byte block
\GHASH_MUL %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
.L_partial_done\@:
mov AadLen(arg2), %r12 # r12 = aadLen (number of bytes)
shl $3, %r12 # convert into number of bits
vmovd %r12d, %xmm15 # len(A) in xmm15
mov InLen(arg2), %r12
shl $3, %r12 # len(C) in bits (*128)
vmovq %r12, %xmm1
vpslldq $8, %xmm15, %xmm15 # xmm15 = len(A)|| 0x0000000000000000
vpxor %xmm1, %xmm15, %xmm15 # xmm15 = len(A)||len(C)
vpxor %xmm15, %xmm14, %xmm14
\GHASH_MUL %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 # final GHASH computation
vpshufb SHUF_MASK(%rip), %xmm14, %xmm14 # perform a 16Byte swap
vmovdqu OrigIV(arg2), %xmm9
ENCRYPT_SINGLE_BLOCK \REP, %xmm9 # E(K, Y0)
vpxor %xmm14, %xmm9, %xmm9
.L_return_T\@:
mov \AUTH_TAG, %r10 # r10 = authTag
mov \AUTH_TAG_LEN, %r11 # r11 = auth_tag_len
cmp $16, %r11
je .L_T_16\@
cmp $8, %r11
jl .L_T_4\@
.L_T_8\@:
vmovq %xmm9, %rax
mov %rax, (%r10)
add $8, %r10
sub $8, %r11
vpsrldq $8, %xmm9, %xmm9
test %r11, %r11
je .L_return_T_done\@
.L_T_4\@:
vmovd %xmm9, %eax
mov %eax, (%r10)
add $4, %r10
sub $4, %r11
vpsrldq $4, %xmm9, %xmm9
test %r11, %r11
je .L_return_T_done\@
.L_T_123\@:
vmovd %xmm9, %eax
cmp $2, %r11
jl .L_T_1\@
mov %ax, (%r10)
cmp $2, %r11
je .L_return_T_done\@
add $2, %r10
sar $16, %eax
.L_T_1\@:
mov %al, (%r10)
jmp .L_return_T_done\@
.L_T_16\@:
vmovdqu %xmm9, (%r10)
.L_return_T_done\@:
.endm
.macro CALC_AAD_HASH GHASH_MUL AAD AADLEN T1 T2 T3 T4 T5 T6 T7 T8
mov \AAD, %r10 # r10 = AAD
mov \AADLEN, %r12 # r12 = aadLen
mov %r12, %r11
vpxor \T8, \T8, \T8
vpxor \T7, \T7, \T7
cmp $16, %r11
jl .L_get_AAD_rest8\@
.L_get_AAD_blocks\@:
vmovdqu (%r10), \T7
vpshufb SHUF_MASK(%rip), \T7, \T7
vpxor \T7, \T8, \T8
\GHASH_MUL \T8, \T2, \T1, \T3, \T4, \T5, \T6
add $16, %r10
sub $16, %r12
sub $16, %r11
cmp $16, %r11
jge .L_get_AAD_blocks\@
vmovdqu \T8, \T7
test %r11, %r11
je .L_get_AAD_done\@
vpxor \T7, \T7, \T7
.L_get_AAD_rest8\@:
cmp $4, %r11
jle .L_get_AAD_rest4\@
movq (%r10), \T1
add $8, %r10
sub $8, %r11
vpslldq $8, \T1, \T1
vpsrldq $8, \T7, \T7
vpxor \T1, \T7, \T7
jmp .L_get_AAD_rest8\@
.L_get_AAD_rest4\@:
test %r11, %r11
jle .L_get_AAD_rest0\@
mov (%r10), %eax
movq %rax, \T1
add $4, %r10
sub $4, %r11
vpslldq $12, \T1, \T1
vpsrldq $4, \T7, \T7
vpxor \T1, \T7, \T7
.L_get_AAD_rest0\@:
leaq ALL_F(%rip), %r11
subq %r12, %r11
vmovdqu 16(%r11), \T1
andq $~3, %r11
vpshufb (%r11), \T7, \T7
vpand \T1, \T7, \T7
.L_get_AAD_rest_final\@:
vpshufb SHUF_MASK(%rip), \T7, \T7
vpxor \T8, \T7, \T7
\GHASH_MUL \T7, \T2, \T1, \T3, \T4, \T5, \T6
.L_get_AAD_done\@:
vmovdqu \T7, AadHash(arg2)
.endm
.macro INIT GHASH_MUL PRECOMPUTE
mov arg6, %r11
mov %r11, AadLen(arg2) # ctx_data.aad_length = aad_length
xor %r11d, %r11d
mov %r11, InLen(arg2) # ctx_data.in_length = 0
mov %r11, PBlockLen(arg2) # ctx_data.partial_block_length = 0
mov %r11, PBlockEncKey(arg2) # ctx_data.partial_block_enc_key = 0
mov arg3, %rax
movdqu (%rax), %xmm0
movdqu %xmm0, OrigIV(arg2) # ctx_data.orig_IV = iv
vpshufb SHUF_MASK(%rip), %xmm0, %xmm0
movdqu %xmm0, CurCount(arg2) # ctx_data.current_counter = iv
vmovdqu (arg4), %xmm6 # xmm6 = HashKey
vpshufb SHUF_MASK(%rip), %xmm6, %xmm6
############### PRECOMPUTATION of HashKey<<1 mod poly from the HashKey
vmovdqa %xmm6, %xmm2
vpsllq $1, %xmm6, %xmm6
vpsrlq $63, %xmm2, %xmm2
vmovdqa %xmm2, %xmm1
vpslldq $8, %xmm2, %xmm2
vpsrldq $8, %xmm1, %xmm1
vpor %xmm2, %xmm6, %xmm6
#reduction
vpshufd $0b00100100, %xmm1, %xmm2
vpcmpeqd TWOONE(%rip), %xmm2, %xmm2
vpand POLY(%rip), %xmm2, %xmm2
vpxor %xmm2, %xmm6, %xmm6 # xmm6 holds the HashKey<<1 mod poly
#######################################################################
vmovdqu %xmm6, HashKey(arg2) # store HashKey<<1 mod poly
CALC_AAD_HASH \GHASH_MUL, arg5, arg6, %xmm2, %xmm6, %xmm3, %xmm4, %xmm5, %xmm7, %xmm1, %xmm0
\PRECOMPUTE %xmm6, %xmm0, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5
.endm
# Reads DLEN bytes starting at DPTR and stores in XMMDst
# where 0 < DLEN < 16
# Clobbers %rax, DLEN
.macro READ_PARTIAL_BLOCK DPTR DLEN XMMDst
vpxor \XMMDst, \XMMDst, \XMMDst
cmp $8, \DLEN
jl .L_read_lt8_\@
mov (\DPTR), %rax
vpinsrq $0, %rax, \XMMDst, \XMMDst
sub $8, \DLEN
jz .L_done_read_partial_block_\@
xor %eax, %eax
.L_read_next_byte_\@:
shl $8, %rax
mov 7(\DPTR, \DLEN, 1), %al
dec \DLEN
jnz .L_read_next_byte_\@
vpinsrq $1, %rax, \XMMDst, \XMMDst
jmp .L_done_read_partial_block_\@
.L_read_lt8_\@:
xor %eax, %eax
.L_read_next_byte_lt8_\@:
shl $8, %rax
mov -1(\DPTR, \DLEN, 1), %al
dec \DLEN
jnz .L_read_next_byte_lt8_\@
vpinsrq $0, %rax, \XMMDst, \XMMDst
.L_done_read_partial_block_\@:
.endm
# PARTIAL_BLOCK: Handles encryption/decryption and the tag partial blocks
# between update calls.
# Requires the input data be at least 1 byte long due to READ_PARTIAL_BLOCK
# Outputs encrypted bytes, and updates hash and partial info in gcm_data_context
# Clobbers rax, r10, r12, r13, xmm0-6, xmm9-13
.macro PARTIAL_BLOCK GHASH_MUL CYPH_PLAIN_OUT PLAIN_CYPH_IN PLAIN_CYPH_LEN DATA_OFFSET \
AAD_HASH ENC_DEC
mov PBlockLen(arg2), %r13
test %r13, %r13
je .L_partial_block_done_\@ # Leave Macro if no partial blocks
# Read in input data without over reading
cmp $16, \PLAIN_CYPH_LEN
jl .L_fewer_than_16_bytes_\@
vmovdqu (\PLAIN_CYPH_IN), %xmm1 # If more than 16 bytes, just fill xmm
jmp .L_data_read_\@
.L_fewer_than_16_bytes_\@:
lea (\PLAIN_CYPH_IN, \DATA_OFFSET, 1), %r10
mov \PLAIN_CYPH_LEN, %r12
READ_PARTIAL_BLOCK %r10 %r12 %xmm1
mov PBlockLen(arg2), %r13
.L_data_read_\@: # Finished reading in data
vmovdqu PBlockEncKey(arg2), %xmm9
vmovdqu HashKey(arg2), %xmm13
lea SHIFT_MASK(%rip), %r12
# adjust the shuffle mask pointer to be able to shift r13 bytes
# r16-r13 is the number of bytes in plaintext mod 16)
add %r13, %r12
vmovdqu (%r12), %xmm2 # get the appropriate shuffle mask
vpshufb %xmm2, %xmm9, %xmm9 # shift right r13 bytes
.if \ENC_DEC == DEC
vmovdqa %xmm1, %xmm3
pxor %xmm1, %xmm9 # Cyphertext XOR E(K, Yn)
mov \PLAIN_CYPH_LEN, %r10
add %r13, %r10
# Set r10 to be the amount of data left in CYPH_PLAIN_IN after filling
sub $16, %r10
# Determine if if partial block is not being filled and
# shift mask accordingly
jge .L_no_extra_mask_1_\@
sub %r10, %r12
.L_no_extra_mask_1_\@:
vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1
# get the appropriate mask to mask out bottom r13 bytes of xmm9
vpand %xmm1, %xmm9, %xmm9 # mask out bottom r13 bytes of xmm9
vpand %xmm1, %xmm3, %xmm3
vmovdqa SHUF_MASK(%rip), %xmm10
vpshufb %xmm10, %xmm3, %xmm3
vpshufb %xmm2, %xmm3, %xmm3
vpxor %xmm3, \AAD_HASH, \AAD_HASH
test %r10, %r10
jl .L_partial_incomplete_1_\@
# GHASH computation for the last <16 Byte block
\GHASH_MUL \AAD_HASH, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
xor %eax,%eax
mov %rax, PBlockLen(arg2)
jmp .L_dec_done_\@
.L_partial_incomplete_1_\@:
add \PLAIN_CYPH_LEN, PBlockLen(arg2)
.L_dec_done_\@:
vmovdqu \AAD_HASH, AadHash(arg2)
.else
vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn)
mov \PLAIN_CYPH_LEN, %r10
add %r13, %r10
# Set r10 to be the amount of data left in CYPH_PLAIN_IN after filling
sub $16, %r10
# Determine if if partial block is not being filled and
# shift mask accordingly
jge .L_no_extra_mask_2_\@
sub %r10, %r12
.L_no_extra_mask_2_\@:
vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1
# get the appropriate mask to mask out bottom r13 bytes of xmm9
vpand %xmm1, %xmm9, %xmm9
vmovdqa SHUF_MASK(%rip), %xmm1
vpshufb %xmm1, %xmm9, %xmm9
vpshufb %xmm2, %xmm9, %xmm9
vpxor %xmm9, \AAD_HASH, \AAD_HASH
test %r10, %r10
jl .L_partial_incomplete_2_\@
# GHASH computation for the last <16 Byte block
\GHASH_MUL \AAD_HASH, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
xor %eax,%eax
mov %rax, PBlockLen(arg2)
jmp .L_encode_done_\@
.L_partial_incomplete_2_\@:
add \PLAIN_CYPH_LEN, PBlockLen(arg2)
.L_encode_done_\@:
vmovdqu \AAD_HASH, AadHash(arg2)
vmovdqa SHUF_MASK(%rip), %xmm10
# shuffle xmm9 back to output as ciphertext
vpshufb %xmm10, %xmm9, %xmm9
vpshufb %xmm2, %xmm9, %xmm9
.endif
# output encrypted Bytes
test %r10, %r10
jl .L_partial_fill_\@
mov %r13, %r12
mov $16, %r13
# Set r13 to be the number of bytes to write out
sub %r12, %r13
jmp .L_count_set_\@
.L_partial_fill_\@:
mov \PLAIN_CYPH_LEN, %r13
.L_count_set_\@:
vmovdqa %xmm9, %xmm0
vmovq %xmm0, %rax
cmp $8, %r13
jle .L_less_than_8_bytes_left_\@
mov %rax, (\CYPH_PLAIN_OUT, \DATA_OFFSET, 1)
add $8, \DATA_OFFSET
psrldq $8, %xmm0
vmovq %xmm0, %rax
sub $8, %r13
.L_less_than_8_bytes_left_\@:
movb %al, (\CYPH_PLAIN_OUT, \DATA_OFFSET, 1)
add $1, \DATA_OFFSET
shr $8, %rax
sub $1, %r13
jne .L_less_than_8_bytes_left_\@
.L_partial_block_done_\@:
.endm # PARTIAL_BLOCK
###############################################################################
# GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0)
# Input: A and B (128-bits each, bit-reflected)
# Output: C = A*B*x mod poly, (i.e. >>1 )
# To compute GH = GH*HashKey mod poly, give HK = HashKey<<1 mod poly as input
# GH = GH * HK * x mod poly which is equivalent to GH*HashKey mod poly.
###############################################################################
.macro GHASH_MUL_AVX GH HK T1 T2 T3 T4 T5
vpshufd $0b01001110, \GH, \T2
vpshufd $0b01001110, \HK, \T3
vpxor \GH , \T2, \T2 # T2 = (a1+a0)
vpxor \HK , \T3, \T3 # T3 = (b1+b0)
vpclmulqdq $0x11, \HK, \GH, \T1 # T1 = a1*b1
vpclmulqdq $0x00, \HK, \GH, \GH # GH = a0*b0
vpclmulqdq $0x00, \T3, \T2, \T2 # T2 = (a1+a0)*(b1+b0)
vpxor \GH, \T2,\T2
vpxor \T1, \T2,\T2 # T2 = a0*b1+a1*b0
vpslldq $8, \T2,\T3 # shift-L T3 2 DWs
vpsrldq $8, \T2,\T2 # shift-R T2 2 DWs
vpxor \T3, \GH, \GH
vpxor \T2, \T1, \T1 # <T1:GH> = GH x HK
#first phase of the reduction
vpslld $31, \GH, \T2 # packed right shifting << 31
vpslld $30, \GH, \T3 # packed right shifting shift << 30
vpslld $25, \GH, \T4 # packed right shifting shift << 25
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpsrldq $4, \T2, \T5 # shift-R T5 1 DW
vpslldq $12, \T2, \T2 # shift-L T2 3 DWs
vpxor \T2, \GH, \GH # first phase of the reduction complete
#second phase of the reduction
vpsrld $1,\GH, \T2 # packed left shifting >> 1
vpsrld $2,\GH, \T3 # packed left shifting >> 2
vpsrld $7,\GH, \T4 # packed left shifting >> 7
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpxor \T5, \T2, \T2
vpxor \T2, \GH, \GH
vpxor \T1, \GH, \GH # the result is in GH
.endm
.macro PRECOMPUTE_AVX HK T1 T2 T3 T4 T5 T6
# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
vmovdqa \HK, \T5
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqu \T1, HashKey_k(arg2)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^2<<1 mod poly
vmovdqu \T5, HashKey_2(arg2) # [HashKey_2] = HashKey^2<<1 mod poly
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqu \T1, HashKey_2_k(arg2)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^3<<1 mod poly
vmovdqu \T5, HashKey_3(arg2)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqu \T1, HashKey_3_k(arg2)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^4<<1 mod poly
vmovdqu \T5, HashKey_4(arg2)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqu \T1, HashKey_4_k(arg2)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^5<<1 mod poly
vmovdqu \T5, HashKey_5(arg2)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqu \T1, HashKey_5_k(arg2)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^6<<1 mod poly
vmovdqu \T5, HashKey_6(arg2)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqu \T1, HashKey_6_k(arg2)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^7<<1 mod poly
vmovdqu \T5, HashKey_7(arg2)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqu \T1, HashKey_7_k(arg2)
GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^8<<1 mod poly
vmovdqu \T5, HashKey_8(arg2)
vpshufd $0b01001110, \T5, \T1
vpxor \T5, \T1, \T1
vmovdqu \T1, HashKey_8_k(arg2)
.endm
## if a = number of total plaintext bytes
## b = floor(a/16)
## num_initial_blocks = b mod 4#
## encrypt the initial num_initial_blocks blocks and apply ghash on the ciphertext
## r10, r11, r12, rax are clobbered
## arg1, arg2, arg3, arg4 are used as pointers only, not modified
.macro INITIAL_BLOCKS_AVX REP num_initial_blocks T1 T2 T3 T4 T5 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T6 T_key ENC_DEC
i = (8-\num_initial_blocks)
setreg
vmovdqu AadHash(arg2), reg_i
# start AES for num_initial_blocks blocks
vmovdqu CurCount(arg2), \CTR
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, reg_i
vpshufb SHUF_MASK(%rip), reg_i, reg_i # perform a 16Byte swap
i = (i+1)
setreg
.endr
vmovdqa (arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpxor \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
j = 1
setreg
.rep \REP
vmovdqa 16*j(arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vaesenc \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
j = (j+1)
setreg
.endr
vmovdqa 16*j(arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vaesenclast \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vmovdqu (arg4, %r11), \T1
vpxor \T1, reg_i, reg_i
vmovdqu reg_i, (arg3 , %r11) # write back ciphertext for num_initial_blocks blocks
add $16, %r11
.if \ENC_DEC == DEC
vmovdqa \T1, reg_i
.endif
vpshufb SHUF_MASK(%rip), reg_i, reg_i # prepare ciphertext for GHASH computations
i = (i+1)
setreg
.endr
i = (8-\num_initial_blocks)
j = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpxor reg_i, reg_j, reg_j
GHASH_MUL_AVX reg_j, \T2, \T1, \T3, \T4, \T5, \T6 # apply GHASH on num_initial_blocks blocks
i = (i+1)
j = (j+1)
setreg
.endr
# XMM8 has the combined result here
vmovdqa \XMM8, TMP1(%rsp)
vmovdqa \XMM8, \T3
cmp $128, %r13
jl .L_initial_blocks_done\@ # no need for precomputed constants
###############################################################################
# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM1
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM2
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM3
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM4
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM5
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM6
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM7
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM8
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
vmovdqa (arg1), \T_key
vpxor \T_key, \XMM1, \XMM1
vpxor \T_key, \XMM2, \XMM2
vpxor \T_key, \XMM3, \XMM3
vpxor \T_key, \XMM4, \XMM4
vpxor \T_key, \XMM5, \XMM5
vpxor \T_key, \XMM6, \XMM6
vpxor \T_key, \XMM7, \XMM7
vpxor \T_key, \XMM8, \XMM8
i = 1
setreg
.rep \REP # do REP rounds
vmovdqa 16*i(arg1), \T_key
vaesenc \T_key, \XMM1, \XMM1
vaesenc \T_key, \XMM2, \XMM2
vaesenc \T_key, \XMM3, \XMM3
vaesenc \T_key, \XMM4, \XMM4
vaesenc \T_key, \XMM5, \XMM5
vaesenc \T_key, \XMM6, \XMM6
vaesenc \T_key, \XMM7, \XMM7
vaesenc \T_key, \XMM8, \XMM8
i = (i+1)
setreg
.endr
vmovdqa 16*i(arg1), \T_key
vaesenclast \T_key, \XMM1, \XMM1
vaesenclast \T_key, \XMM2, \XMM2
vaesenclast \T_key, \XMM3, \XMM3
vaesenclast \T_key, \XMM4, \XMM4
vaesenclast \T_key, \XMM5, \XMM5
vaesenclast \T_key, \XMM6, \XMM6
vaesenclast \T_key, \XMM7, \XMM7
vaesenclast \T_key, \XMM8, \XMM8
vmovdqu (arg4, %r11), \T1
vpxor \T1, \XMM1, \XMM1
vmovdqu \XMM1, (arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM1
.endif
vmovdqu 16*1(arg4, %r11), \T1
vpxor \T1, \XMM2, \XMM2
vmovdqu \XMM2, 16*1(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM2
.endif
vmovdqu 16*2(arg4, %r11), \T1
vpxor \T1, \XMM3, \XMM3
vmovdqu \XMM3, 16*2(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM3
.endif
vmovdqu 16*3(arg4, %r11), \T1
vpxor \T1, \XMM4, \XMM4
vmovdqu \XMM4, 16*3(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM4
.endif
vmovdqu 16*4(arg4, %r11), \T1
vpxor \T1, \XMM5, \XMM5
vmovdqu \XMM5, 16*4(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM5
.endif
vmovdqu 16*5(arg4, %r11), \T1
vpxor \T1, \XMM6, \XMM6
vmovdqu \XMM6, 16*5(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM6
.endif
vmovdqu 16*6(arg4, %r11), \T1
vpxor \T1, \XMM7, \XMM7
vmovdqu \XMM7, 16*6(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM7
.endif
vmovdqu 16*7(arg4, %r11), \T1
vpxor \T1, \XMM8, \XMM8
vmovdqu \XMM8, 16*7(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM8
.endif
add $128, %r11
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpxor TMP1(%rsp), \XMM1, \XMM1 # combine GHASHed value with the corresponding ciphertext
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
###############################################################################
.L_initial_blocks_done\@:
.endm
# encrypt 8 blocks at a time
# ghash the 8 previously encrypted ciphertext blocks
# arg1, arg2, arg3, arg4 are used as pointers only, not modified
# r11 is the data offset value
.macro GHASH_8_ENCRYPT_8_PARALLEL_AVX REP T1 T2 T3 T4 T5 T6 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T7 loop_idx ENC_DEC
vmovdqa \XMM1, \T2
vmovdqa \XMM2, TMP2(%rsp)
vmovdqa \XMM3, TMP3(%rsp)
vmovdqa \XMM4, TMP4(%rsp)
vmovdqa \XMM5, TMP5(%rsp)
vmovdqa \XMM6, TMP6(%rsp)
vmovdqa \XMM7, TMP7(%rsp)
vmovdqa \XMM8, TMP8(%rsp)
.if \loop_idx == in_order
vpaddd ONE(%rip), \CTR, \XMM1 # INCR CNT
vpaddd ONE(%rip), \XMM1, \XMM2
vpaddd ONE(%rip), \XMM2, \XMM3
vpaddd ONE(%rip), \XMM3, \XMM4
vpaddd ONE(%rip), \XMM4, \XMM5
vpaddd ONE(%rip), \XMM5, \XMM6
vpaddd ONE(%rip), \XMM6, \XMM7
vpaddd ONE(%rip), \XMM7, \XMM8
vmovdqa \XMM8, \CTR
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
.else
vpaddd ONEf(%rip), \CTR, \XMM1 # INCR CNT
vpaddd ONEf(%rip), \XMM1, \XMM2
vpaddd ONEf(%rip), \XMM2, \XMM3
vpaddd ONEf(%rip), \XMM3, \XMM4
vpaddd ONEf(%rip), \XMM4, \XMM5
vpaddd ONEf(%rip), \XMM5, \XMM6
vpaddd ONEf(%rip), \XMM6, \XMM7
vpaddd ONEf(%rip), \XMM7, \XMM8
vmovdqa \XMM8, \CTR
.endif
#######################################################################
vmovdqu (arg1), \T1
vpxor \T1, \XMM1, \XMM1
vpxor \T1, \XMM2, \XMM2
vpxor \T1, \XMM3, \XMM3
vpxor \T1, \XMM4, \XMM4
vpxor \T1, \XMM5, \XMM5
vpxor \T1, \XMM6, \XMM6
vpxor \T1, \XMM7, \XMM7
vpxor \T1, \XMM8, \XMM8
#######################################################################
vmovdqu 16*1(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqu 16*2(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
#######################################################################
vmovdqu HashKey_8(arg2), \T5
vpclmulqdq $0x11, \T5, \T2, \T4 # T4 = a1*b1
vpclmulqdq $0x00, \T5, \T2, \T7 # T7 = a0*b0
vpshufd $0b01001110, \T2, \T6
vpxor \T2, \T6, \T6
vmovdqu HashKey_8_k(arg2), \T5
vpclmulqdq $0x00, \T5, \T6, \T6
vmovdqu 16*3(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP2(%rsp), \T1
vmovdqu HashKey_7(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqu HashKey_7_k(arg2), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*4(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
#######################################################################
vmovdqa TMP3(%rsp), \T1
vmovdqu HashKey_6(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqu HashKey_6_k(arg2), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*5(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP4(%rsp), \T1
vmovdqu HashKey_5(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqu HashKey_5_k(arg2), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*6(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP5(%rsp), \T1
vmovdqu HashKey_4(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqu HashKey_4_k(arg2), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*7(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP6(%rsp), \T1
vmovdqu HashKey_3(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqu HashKey_3_k(arg2), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*8(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP7(%rsp), \T1
vmovdqu HashKey_2(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqu HashKey_2_k(arg2), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
#######################################################################
vmovdqu 16*9(arg1), \T5
vaesenc \T5, \XMM1, \XMM1
vaesenc \T5, \XMM2, \XMM2
vaesenc \T5, \XMM3, \XMM3
vaesenc \T5, \XMM4, \XMM4
vaesenc \T5, \XMM5, \XMM5
vaesenc \T5, \XMM6, \XMM6
vaesenc \T5, \XMM7, \XMM7
vaesenc \T5, \XMM8, \XMM8
vmovdqa TMP8(%rsp), \T1
vmovdqu HashKey(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpshufd $0b01001110, \T1, \T3
vpxor \T1, \T3, \T3
vmovdqu HashKey_k(arg2), \T5
vpclmulqdq $0x10, \T5, \T3, \T3
vpxor \T3, \T6, \T6
vpxor \T4, \T6, \T6
vpxor \T7, \T6, \T6
vmovdqu 16*10(arg1), \T5
i = 11
setreg
.rep (\REP-9)
vaesenc \T5, \XMM1, \XMM1
vaesenc \T5, \XMM2, \XMM2
vaesenc \T5, \XMM3, \XMM3
vaesenc \T5, \XMM4, \XMM4
vaesenc \T5, \XMM5, \XMM5
vaesenc \T5, \XMM6, \XMM6
vaesenc \T5, \XMM7, \XMM7
vaesenc \T5, \XMM8, \XMM8
vmovdqu 16*i(arg1), \T5
i = i + 1
setreg
.endr
i = 0
j = 1
setreg
.rep 8
vpxor 16*i(arg4, %r11), \T5, \T2
.if \ENC_DEC == ENC
vaesenclast \T2, reg_j, reg_j
.else
vaesenclast \T2, reg_j, \T3
vmovdqu 16*i(arg4, %r11), reg_j
vmovdqu \T3, 16*i(arg3, %r11)
.endif
i = (i+1)
j = (j+1)
setreg
.endr
#######################################################################
vpslldq $8, \T6, \T3 # shift-L T3 2 DWs
vpsrldq $8, \T6, \T6 # shift-R T2 2 DWs
vpxor \T3, \T7, \T7
vpxor \T4, \T6, \T6 # accumulate the results in T6:T7
#######################################################################
#first phase of the reduction
#######################################################################
vpslld $31, \T7, \T2 # packed right shifting << 31
vpslld $30, \T7, \T3 # packed right shifting shift << 30
vpslld $25, \T7, \T4 # packed right shifting shift << 25
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpsrldq $4, \T2, \T1 # shift-R T1 1 DW
vpslldq $12, \T2, \T2 # shift-L T2 3 DWs
vpxor \T2, \T7, \T7 # first phase of the reduction complete
#######################################################################
.if \ENC_DEC == ENC
vmovdqu \XMM1, 16*0(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM2, 16*1(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM3, 16*2(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM4, 16*3(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM5, 16*4(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM6, 16*5(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM7, 16*6(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM8, 16*7(arg3,%r11) # Write to the Ciphertext buffer
.endif
#######################################################################
#second phase of the reduction
vpsrld $1, \T7, \T2 # packed left shifting >> 1
vpsrld $2, \T7, \T3 # packed left shifting >> 2
vpsrld $7, \T7, \T4 # packed left shifting >> 7
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpxor \T1, \T2, \T2
vpxor \T2, \T7, \T7
vpxor \T7, \T6, \T6 # the result is in T6
#######################################################################
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
vpxor \T6, \XMM1, \XMM1
.endm
# GHASH the last 4 ciphertext blocks.
.macro GHASH_LAST_8_AVX T1 T2 T3 T4 T5 T6 T7 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8
## Karatsuba Method
vpshufd $0b01001110, \XMM1, \T2
vpxor \XMM1, \T2, \T2
vmovdqu HashKey_8(arg2), \T5
vpclmulqdq $0x11, \T5, \XMM1, \T6
vpclmulqdq $0x00, \T5, \XMM1, \T7
vmovdqu HashKey_8_k(arg2), \T3
vpclmulqdq $0x00, \T3, \T2, \XMM1
######################
vpshufd $0b01001110, \XMM2, \T2
vpxor \XMM2, \T2, \T2
vmovdqu HashKey_7(arg2), \T5
vpclmulqdq $0x11, \T5, \XMM2, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM2, \T4
vpxor \T4, \T7, \T7
vmovdqu HashKey_7_k(arg2), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM3, \T2
vpxor \XMM3, \T2, \T2
vmovdqu HashKey_6(arg2), \T5
vpclmulqdq $0x11, \T5, \XMM3, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM3, \T4
vpxor \T4, \T7, \T7
vmovdqu HashKey_6_k(arg2), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM4, \T2
vpxor \XMM4, \T2, \T2
vmovdqu HashKey_5(arg2), \T5
vpclmulqdq $0x11, \T5, \XMM4, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM4, \T4
vpxor \T4, \T7, \T7
vmovdqu HashKey_5_k(arg2), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM5, \T2
vpxor \XMM5, \T2, \T2
vmovdqu HashKey_4(arg2), \T5
vpclmulqdq $0x11, \T5, \XMM5, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM5, \T4
vpxor \T4, \T7, \T7
vmovdqu HashKey_4_k(arg2), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM6, \T2
vpxor \XMM6, \T2, \T2
vmovdqu HashKey_3(arg2), \T5
vpclmulqdq $0x11, \T5, \XMM6, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM6, \T4
vpxor \T4, \T7, \T7
vmovdqu HashKey_3_k(arg2), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM7, \T2
vpxor \XMM7, \T2, \T2
vmovdqu HashKey_2(arg2), \T5
vpclmulqdq $0x11, \T5, \XMM7, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM7, \T4
vpxor \T4, \T7, \T7
vmovdqu HashKey_2_k(arg2), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vpshufd $0b01001110, \XMM8, \T2
vpxor \XMM8, \T2, \T2
vmovdqu HashKey(arg2), \T5
vpclmulqdq $0x11, \T5, \XMM8, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM8, \T4
vpxor \T4, \T7, \T7
vmovdqu HashKey_k(arg2), \T3
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
vpxor \T6, \XMM1, \XMM1
vpxor \T7, \XMM1, \T2
vpslldq $8, \T2, \T4
vpsrldq $8, \T2, \T2
vpxor \T4, \T7, \T7
vpxor \T2, \T6, \T6 # <T6:T7> holds the result of
# the accumulated carry-less multiplications
#######################################################################
#first phase of the reduction
vpslld $31, \T7, \T2 # packed right shifting << 31
vpslld $30, \T7, \T3 # packed right shifting shift << 30
vpslld $25, \T7, \T4 # packed right shifting shift << 25
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpsrldq $4, \T2, \T1 # shift-R T1 1 DW
vpslldq $12, \T2, \T2 # shift-L T2 3 DWs
vpxor \T2, \T7, \T7 # first phase of the reduction complete
#######################################################################
#second phase of the reduction
vpsrld $1, \T7, \T2 # packed left shifting >> 1
vpsrld $2, \T7, \T3 # packed left shifting >> 2
vpsrld $7, \T7, \T4 # packed left shifting >> 7
vpxor \T3, \T2, \T2 # xor the shifted versions
vpxor \T4, \T2, \T2
vpxor \T1, \T2, \T2
vpxor \T2, \T7, \T7
vpxor \T7, \T6, \T6 # the result is in T6
.endm
#############################################################
#void aesni_gcm_precomp_avx_gen2
# (gcm_data *my_ctx_data,
# gcm_context_data *data,
# u8 *hash_subkey# /* H, the Hash sub key input. Data starts on a 16-byte boundary. */
# u8 *iv, /* Pre-counter block j0: 4 byte salt
# (from Security Association) concatenated with 8 byte
# Initialisation Vector (from IPSec ESP Payload)
# concatenated with 0x00000001. 16-byte aligned pointer. */
# const u8 *aad, /* Additional Authentication Data (AAD)*/
# u64 aad_len) /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
#############################################################
SYM_FUNC_START(aesni_gcm_init_avx_gen2)
FUNC_SAVE
INIT GHASH_MUL_AVX, PRECOMPUTE_AVX
FUNC_RESTORE
RET
SYM_FUNC_END(aesni_gcm_init_avx_gen2)
###############################################################################
#void aesni_gcm_enc_update_avx_gen2(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# gcm_context_data *data,
# u8 *out, /* Ciphertext output. Encrypt in-place is allowed. */
# const u8 *in, /* Plaintext input */
# u64 plaintext_len) /* Length of data in Bytes for encryption. */
###############################################################################
SYM_FUNC_START(aesni_gcm_enc_update_avx_gen2)
FUNC_SAVE
mov keysize, %eax
cmp $32, %eax
je key_256_enc_update
cmp $16, %eax
je key_128_enc_update
# must be 192
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, ENC, 11
FUNC_RESTORE
RET
key_128_enc_update:
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, ENC, 9
FUNC_RESTORE
RET
key_256_enc_update:
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, ENC, 13
FUNC_RESTORE
RET
SYM_FUNC_END(aesni_gcm_enc_update_avx_gen2)
###############################################################################
#void aesni_gcm_dec_update_avx_gen2(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# gcm_context_data *data,
# u8 *out, /* Plaintext output. Decrypt in-place is allowed. */
# const u8 *in, /* Ciphertext input */
# u64 plaintext_len) /* Length of data in Bytes for encryption. */
###############################################################################
SYM_FUNC_START(aesni_gcm_dec_update_avx_gen2)
FUNC_SAVE
mov keysize,%eax
cmp $32, %eax
je key_256_dec_update
cmp $16, %eax
je key_128_dec_update
# must be 192
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, DEC, 11
FUNC_RESTORE
RET
key_128_dec_update:
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, DEC, 9
FUNC_RESTORE
RET
key_256_dec_update:
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, DEC, 13
FUNC_RESTORE
RET
SYM_FUNC_END(aesni_gcm_dec_update_avx_gen2)
###############################################################################
#void aesni_gcm_finalize_avx_gen2(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# gcm_context_data *data,
# u8 *auth_tag, /* Authenticated Tag output. */
# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
# Valid values are 16 (most likely), 12 or 8. */
###############################################################################
SYM_FUNC_START(aesni_gcm_finalize_avx_gen2)
FUNC_SAVE
mov keysize,%eax
cmp $32, %eax
je key_256_finalize
cmp $16, %eax
je key_128_finalize
# must be 192
GCM_COMPLETE GHASH_MUL_AVX, 11, arg3, arg4
FUNC_RESTORE
RET
key_128_finalize:
GCM_COMPLETE GHASH_MUL_AVX, 9, arg3, arg4
FUNC_RESTORE
RET
key_256_finalize:
GCM_COMPLETE GHASH_MUL_AVX, 13, arg3, arg4
FUNC_RESTORE
RET
SYM_FUNC_END(aesni_gcm_finalize_avx_gen2)
###############################################################################
# GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0)
# Input: A and B (128-bits each, bit-reflected)
# Output: C = A*B*x mod poly, (i.e. >>1 )
# To compute GH = GH*HashKey mod poly, give HK = HashKey<<1 mod poly as input
# GH = GH * HK * x mod poly which is equivalent to GH*HashKey mod poly.
###############################################################################
.macro GHASH_MUL_AVX2 GH HK T1 T2 T3 T4 T5
vpclmulqdq $0x11,\HK,\GH,\T1 # T1 = a1*b1
vpclmulqdq $0x00,\HK,\GH,\T2 # T2 = a0*b0
vpclmulqdq $0x01,\HK,\GH,\T3 # T3 = a1*b0
vpclmulqdq $0x10,\HK,\GH,\GH # GH = a0*b1
vpxor \T3, \GH, \GH
vpsrldq $8 , \GH, \T3 # shift-R GH 2 DWs
vpslldq $8 , \GH, \GH # shift-L GH 2 DWs
vpxor \T3, \T1, \T1
vpxor \T2, \GH, \GH
#######################################################################
#first phase of the reduction
vmovdqa POLY2(%rip), \T3
vpclmulqdq $0x01, \GH, \T3, \T2
vpslldq $8, \T2, \T2 # shift-L T2 2 DWs
vpxor \T2, \GH, \GH # first phase of the reduction complete
#######################################################################
#second phase of the reduction
vpclmulqdq $0x00, \GH, \T3, \T2
vpsrldq $4, \T2, \T2 # shift-R T2 1 DW (Shift-R only 1-DW to obtain 2-DWs shift-R)
vpclmulqdq $0x10, \GH, \T3, \GH
vpslldq $4, \GH, \GH # shift-L GH 1 DW (Shift-L 1-DW to obtain result with no shifts)
vpxor \T2, \GH, \GH # second phase of the reduction complete
#######################################################################
vpxor \T1, \GH, \GH # the result is in GH
.endm
.macro PRECOMPUTE_AVX2 HK T1 T2 T3 T4 T5 T6
# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
vmovdqa \HK, \T5
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^2<<1 mod poly
vmovdqu \T5, HashKey_2(arg2) # [HashKey_2] = HashKey^2<<1 mod poly
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^3<<1 mod poly
vmovdqu \T5, HashKey_3(arg2)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^4<<1 mod poly
vmovdqu \T5, HashKey_4(arg2)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^5<<1 mod poly
vmovdqu \T5, HashKey_5(arg2)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^6<<1 mod poly
vmovdqu \T5, HashKey_6(arg2)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^7<<1 mod poly
vmovdqu \T5, HashKey_7(arg2)
GHASH_MUL_AVX2 \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^8<<1 mod poly
vmovdqu \T5, HashKey_8(arg2)
.endm
## if a = number of total plaintext bytes
## b = floor(a/16)
## num_initial_blocks = b mod 4#
## encrypt the initial num_initial_blocks blocks and apply ghash on the ciphertext
## r10, r11, r12, rax are clobbered
## arg1, arg2, arg3, arg4 are used as pointers only, not modified
.macro INITIAL_BLOCKS_AVX2 REP num_initial_blocks T1 T2 T3 T4 T5 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T6 T_key ENC_DEC VER
i = (8-\num_initial_blocks)
setreg
vmovdqu AadHash(arg2), reg_i
# start AES for num_initial_blocks blocks
vmovdqu CurCount(arg2), \CTR
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, reg_i
vpshufb SHUF_MASK(%rip), reg_i, reg_i # perform a 16Byte swap
i = (i+1)
setreg
.endr
vmovdqa (arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpxor \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
j = 1
setreg
.rep \REP
vmovdqa 16*j(arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vaesenc \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
j = (j+1)
setreg
.endr
vmovdqa 16*j(arg1), \T_key
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vaesenclast \T_key, reg_i, reg_i
i = (i+1)
setreg
.endr
i = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vmovdqu (arg4, %r11), \T1
vpxor \T1, reg_i, reg_i
vmovdqu reg_i, (arg3 , %r11) # write back ciphertext for
# num_initial_blocks blocks
add $16, %r11
.if \ENC_DEC == DEC
vmovdqa \T1, reg_i
.endif
vpshufb SHUF_MASK(%rip), reg_i, reg_i # prepare ciphertext for GHASH computations
i = (i+1)
setreg
.endr
i = (8-\num_initial_blocks)
j = (9-\num_initial_blocks)
setreg
.rep \num_initial_blocks
vpxor reg_i, reg_j, reg_j
GHASH_MUL_AVX2 reg_j, \T2, \T1, \T3, \T4, \T5, \T6 # apply GHASH on num_initial_blocks blocks
i = (i+1)
j = (j+1)
setreg
.endr
# XMM8 has the combined result here
vmovdqa \XMM8, TMP1(%rsp)
vmovdqa \XMM8, \T3
cmp $128, %r13
jl .L_initial_blocks_done\@ # no need for precomputed constants
###############################################################################
# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM1
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM2
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM3
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM4
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM5
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM6
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM7
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpaddd ONE(%rip), \CTR, \CTR # INCR Y0
vmovdqa \CTR, \XMM8
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
vmovdqa (arg1), \T_key
vpxor \T_key, \XMM1, \XMM1
vpxor \T_key, \XMM2, \XMM2
vpxor \T_key, \XMM3, \XMM3
vpxor \T_key, \XMM4, \XMM4
vpxor \T_key, \XMM5, \XMM5
vpxor \T_key, \XMM6, \XMM6
vpxor \T_key, \XMM7, \XMM7
vpxor \T_key, \XMM8, \XMM8
i = 1
setreg
.rep \REP # do REP rounds
vmovdqa 16*i(arg1), \T_key
vaesenc \T_key, \XMM1, \XMM1
vaesenc \T_key, \XMM2, \XMM2
vaesenc \T_key, \XMM3, \XMM3
vaesenc \T_key, \XMM4, \XMM4
vaesenc \T_key, \XMM5, \XMM5
vaesenc \T_key, \XMM6, \XMM6
vaesenc \T_key, \XMM7, \XMM7
vaesenc \T_key, \XMM8, \XMM8
i = (i+1)
setreg
.endr
vmovdqa 16*i(arg1), \T_key
vaesenclast \T_key, \XMM1, \XMM1
vaesenclast \T_key, \XMM2, \XMM2
vaesenclast \T_key, \XMM3, \XMM3
vaesenclast \T_key, \XMM4, \XMM4
vaesenclast \T_key, \XMM5, \XMM5
vaesenclast \T_key, \XMM6, \XMM6
vaesenclast \T_key, \XMM7, \XMM7
vaesenclast \T_key, \XMM8, \XMM8
vmovdqu (arg4, %r11), \T1
vpxor \T1, \XMM1, \XMM1
vmovdqu \XMM1, (arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM1
.endif
vmovdqu 16*1(arg4, %r11), \T1
vpxor \T1, \XMM2, \XMM2
vmovdqu \XMM2, 16*1(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM2
.endif
vmovdqu 16*2(arg4, %r11), \T1
vpxor \T1, \XMM3, \XMM3
vmovdqu \XMM3, 16*2(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM3
.endif
vmovdqu 16*3(arg4, %r11), \T1
vpxor \T1, \XMM4, \XMM4
vmovdqu \XMM4, 16*3(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM4
.endif
vmovdqu 16*4(arg4, %r11), \T1
vpxor \T1, \XMM5, \XMM5
vmovdqu \XMM5, 16*4(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM5
.endif
vmovdqu 16*5(arg4, %r11), \T1
vpxor \T1, \XMM6, \XMM6
vmovdqu \XMM6, 16*5(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM6
.endif
vmovdqu 16*6(arg4, %r11), \T1
vpxor \T1, \XMM7, \XMM7
vmovdqu \XMM7, 16*6(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM7
.endif
vmovdqu 16*7(arg4, %r11), \T1
vpxor \T1, \XMM8, \XMM8
vmovdqu \XMM8, 16*7(arg3 , %r11)
.if \ENC_DEC == DEC
vmovdqa \T1, \XMM8
.endif
add $128, %r11
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpxor TMP1(%rsp), \XMM1, \XMM1 # combine GHASHed value with
# the corresponding ciphertext
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
###############################################################################
.L_initial_blocks_done\@:
.endm
# encrypt 8 blocks at a time
# ghash the 8 previously encrypted ciphertext blocks
# arg1, arg2, arg3, arg4 are used as pointers only, not modified
# r11 is the data offset value
.macro GHASH_8_ENCRYPT_8_PARALLEL_AVX2 REP T1 T2 T3 T4 T5 T6 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T7 loop_idx ENC_DEC
vmovdqa \XMM1, \T2
vmovdqa \XMM2, TMP2(%rsp)
vmovdqa \XMM3, TMP3(%rsp)
vmovdqa \XMM4, TMP4(%rsp)
vmovdqa \XMM5, TMP5(%rsp)
vmovdqa \XMM6, TMP6(%rsp)
vmovdqa \XMM7, TMP7(%rsp)
vmovdqa \XMM8, TMP8(%rsp)
.if \loop_idx == in_order
vpaddd ONE(%rip), \CTR, \XMM1 # INCR CNT
vpaddd ONE(%rip), \XMM1, \XMM2
vpaddd ONE(%rip), \XMM2, \XMM3
vpaddd ONE(%rip), \XMM3, \XMM4
vpaddd ONE(%rip), \XMM4, \XMM5
vpaddd ONE(%rip), \XMM5, \XMM6
vpaddd ONE(%rip), \XMM6, \XMM7
vpaddd ONE(%rip), \XMM7, \XMM8
vmovdqa \XMM8, \CTR
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
.else
vpaddd ONEf(%rip), \CTR, \XMM1 # INCR CNT
vpaddd ONEf(%rip), \XMM1, \XMM2
vpaddd ONEf(%rip), \XMM2, \XMM3
vpaddd ONEf(%rip), \XMM3, \XMM4
vpaddd ONEf(%rip), \XMM4, \XMM5
vpaddd ONEf(%rip), \XMM5, \XMM6
vpaddd ONEf(%rip), \XMM6, \XMM7
vpaddd ONEf(%rip), \XMM7, \XMM8
vmovdqa \XMM8, \CTR
.endif
#######################################################################
vmovdqu (arg1), \T1
vpxor \T1, \XMM1, \XMM1
vpxor \T1, \XMM2, \XMM2
vpxor \T1, \XMM3, \XMM3
vpxor \T1, \XMM4, \XMM4
vpxor \T1, \XMM5, \XMM5
vpxor \T1, \XMM6, \XMM6
vpxor \T1, \XMM7, \XMM7
vpxor \T1, \XMM8, \XMM8
#######################################################################
vmovdqu 16*1(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqu 16*2(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
#######################################################################
vmovdqu HashKey_8(arg2), \T5
vpclmulqdq $0x11, \T5, \T2, \T4 # T4 = a1*b1
vpclmulqdq $0x00, \T5, \T2, \T7 # T7 = a0*b0
vpclmulqdq $0x01, \T5, \T2, \T6 # T6 = a1*b0
vpclmulqdq $0x10, \T5, \T2, \T5 # T5 = a0*b1
vpxor \T5, \T6, \T6
vmovdqu 16*3(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP2(%rsp), \T1
vmovdqu HashKey_7(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*4(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
#######################################################################
vmovdqa TMP3(%rsp), \T1
vmovdqu HashKey_6(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*5(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP4(%rsp), \T1
vmovdqu HashKey_5(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*6(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP5(%rsp), \T1
vmovdqu HashKey_4(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*7(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP6(%rsp), \T1
vmovdqu HashKey_3(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vmovdqu 16*8(arg1), \T1
vaesenc \T1, \XMM1, \XMM1
vaesenc \T1, \XMM2, \XMM2
vaesenc \T1, \XMM3, \XMM3
vaesenc \T1, \XMM4, \XMM4
vaesenc \T1, \XMM5, \XMM5
vaesenc \T1, \XMM6, \XMM6
vaesenc \T1, \XMM7, \XMM7
vaesenc \T1, \XMM8, \XMM8
vmovdqa TMP7(%rsp), \T1
vmovdqu HashKey_2(arg2), \T5
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T4
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
#######################################################################
vmovdqu 16*9(arg1), \T5
vaesenc \T5, \XMM1, \XMM1
vaesenc \T5, \XMM2, \XMM2
vaesenc \T5, \XMM3, \XMM3
vaesenc \T5, \XMM4, \XMM4
vaesenc \T5, \XMM5, \XMM5
vaesenc \T5, \XMM6, \XMM6
vaesenc \T5, \XMM7, \XMM7
vaesenc \T5, \XMM8, \XMM8
vmovdqa TMP8(%rsp), \T1
vmovdqu HashKey(arg2), \T5
vpclmulqdq $0x00, \T5, \T1, \T3
vpxor \T3, \T7, \T7
vpclmulqdq $0x01, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x10, \T5, \T1, \T3
vpxor \T3, \T6, \T6
vpclmulqdq $0x11, \T5, \T1, \T3
vpxor \T3, \T4, \T1
vmovdqu 16*10(arg1), \T5
i = 11
setreg
.rep (\REP-9)
vaesenc \T5, \XMM1, \XMM1
vaesenc \T5, \XMM2, \XMM2
vaesenc \T5, \XMM3, \XMM3
vaesenc \T5, \XMM4, \XMM4
vaesenc \T5, \XMM5, \XMM5
vaesenc \T5, \XMM6, \XMM6
vaesenc \T5, \XMM7, \XMM7
vaesenc \T5, \XMM8, \XMM8
vmovdqu 16*i(arg1), \T5
i = i + 1
setreg
.endr
i = 0
j = 1
setreg
.rep 8
vpxor 16*i(arg4, %r11), \T5, \T2
.if \ENC_DEC == ENC
vaesenclast \T2, reg_j, reg_j
.else
vaesenclast \T2, reg_j, \T3
vmovdqu 16*i(arg4, %r11), reg_j
vmovdqu \T3, 16*i(arg3, %r11)
.endif
i = (i+1)
j = (j+1)
setreg
.endr
#######################################################################
vpslldq $8, \T6, \T3 # shift-L T3 2 DWs
vpsrldq $8, \T6, \T6 # shift-R T2 2 DWs
vpxor \T3, \T7, \T7
vpxor \T6, \T1, \T1 # accumulate the results in T1:T7
#######################################################################
#first phase of the reduction
vmovdqa POLY2(%rip), \T3
vpclmulqdq $0x01, \T7, \T3, \T2
vpslldq $8, \T2, \T2 # shift-L xmm2 2 DWs
vpxor \T2, \T7, \T7 # first phase of the reduction complete
#######################################################################
.if \ENC_DEC == ENC
vmovdqu \XMM1, 16*0(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM2, 16*1(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM3, 16*2(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM4, 16*3(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM5, 16*4(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM6, 16*5(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM7, 16*6(arg3,%r11) # Write to the Ciphertext buffer
vmovdqu \XMM8, 16*7(arg3,%r11) # Write to the Ciphertext buffer
.endif
#######################################################################
#second phase of the reduction
vpclmulqdq $0x00, \T7, \T3, \T2
vpsrldq $4, \T2, \T2 # shift-R xmm2 1 DW (Shift-R only 1-DW to obtain 2-DWs shift-R)
vpclmulqdq $0x10, \T7, \T3, \T4
vpslldq $4, \T4, \T4 # shift-L xmm0 1 DW (Shift-L 1-DW to obtain result with no shifts)
vpxor \T2, \T4, \T4 # second phase of the reduction complete
#######################################################################
vpxor \T4, \T1, \T1 # the result is in T1
vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap
vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap
vpxor \T1, \XMM1, \XMM1
.endm
# GHASH the last 4 ciphertext blocks.
.macro GHASH_LAST_8_AVX2 T1 T2 T3 T4 T5 T6 T7 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8
## Karatsuba Method
vmovdqu HashKey_8(arg2), \T5
vpshufd $0b01001110, \XMM1, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM1, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM1, \T6
vpclmulqdq $0x00, \T5, \XMM1, \T7
vpclmulqdq $0x00, \T3, \T2, \XMM1
######################
vmovdqu HashKey_7(arg2), \T5
vpshufd $0b01001110, \XMM2, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM2, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM2, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM2, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqu HashKey_6(arg2), \T5
vpshufd $0b01001110, \XMM3, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM3, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM3, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM3, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqu HashKey_5(arg2), \T5
vpshufd $0b01001110, \XMM4, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM4, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM4, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM4, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqu HashKey_4(arg2), \T5
vpshufd $0b01001110, \XMM5, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM5, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM5, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM5, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqu HashKey_3(arg2), \T5
vpshufd $0b01001110, \XMM6, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM6, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM6, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM6, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqu HashKey_2(arg2), \T5
vpshufd $0b01001110, \XMM7, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM7, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM7, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM7, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
######################
vmovdqu HashKey(arg2), \T5
vpshufd $0b01001110, \XMM8, \T2
vpshufd $0b01001110, \T5, \T3
vpxor \XMM8, \T2, \T2
vpxor \T5, \T3, \T3
vpclmulqdq $0x11, \T5, \XMM8, \T4
vpxor \T4, \T6, \T6
vpclmulqdq $0x00, \T5, \XMM8, \T4
vpxor \T4, \T7, \T7
vpclmulqdq $0x00, \T3, \T2, \T2
vpxor \T2, \XMM1, \XMM1
vpxor \T6, \XMM1, \XMM1
vpxor \T7, \XMM1, \T2
vpslldq $8, \T2, \T4
vpsrldq $8, \T2, \T2
vpxor \T4, \T7, \T7
vpxor \T2, \T6, \T6 # <T6:T7> holds the result of the
# accumulated carry-less multiplications
#######################################################################
#first phase of the reduction
vmovdqa POLY2(%rip), \T3
vpclmulqdq $0x01, \T7, \T3, \T2
vpslldq $8, \T2, \T2 # shift-L xmm2 2 DWs
vpxor \T2, \T7, \T7 # first phase of the reduction complete
#######################################################################
#second phase of the reduction
vpclmulqdq $0x00, \T7, \T3, \T2
vpsrldq $4, \T2, \T2 # shift-R T2 1 DW (Shift-R only 1-DW to obtain 2-DWs shift-R)
vpclmulqdq $0x10, \T7, \T3, \T4
vpslldq $4, \T4, \T4 # shift-L T4 1 DW (Shift-L 1-DW to obtain result with no shifts)
vpxor \T2, \T4, \T4 # second phase of the reduction complete
#######################################################################
vpxor \T4, \T6, \T6 # the result is in T6
.endm
#############################################################
#void aesni_gcm_init_avx_gen4
# (gcm_data *my_ctx_data,
# gcm_context_data *data,
# u8 *iv, /* Pre-counter block j0: 4 byte salt
# (from Security Association) concatenated with 8 byte
# Initialisation Vector (from IPSec ESP Payload)
# concatenated with 0x00000001. 16-byte aligned pointer. */
# u8 *hash_subkey# /* H, the Hash sub key input. Data starts on a 16-byte boundary. */
# const u8 *aad, /* Additional Authentication Data (AAD)*/
# u64 aad_len) /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
#############################################################
SYM_FUNC_START(aesni_gcm_init_avx_gen4)
FUNC_SAVE
INIT GHASH_MUL_AVX2, PRECOMPUTE_AVX2
FUNC_RESTORE
RET
SYM_FUNC_END(aesni_gcm_init_avx_gen4)
###############################################################################
#void aesni_gcm_enc_avx_gen4(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# gcm_context_data *data,
# u8 *out, /* Ciphertext output. Encrypt in-place is allowed. */
# const u8 *in, /* Plaintext input */
# u64 plaintext_len) /* Length of data in Bytes for encryption. */
###############################################################################
SYM_FUNC_START(aesni_gcm_enc_update_avx_gen4)
FUNC_SAVE
mov keysize,%eax
cmp $32, %eax
je key_256_enc_update4
cmp $16, %eax
je key_128_enc_update4
# must be 192
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, ENC, 11
FUNC_RESTORE
RET
key_128_enc_update4:
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, ENC, 9
FUNC_RESTORE
RET
key_256_enc_update4:
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, ENC, 13
FUNC_RESTORE
RET
SYM_FUNC_END(aesni_gcm_enc_update_avx_gen4)
###############################################################################
#void aesni_gcm_dec_update_avx_gen4(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# gcm_context_data *data,
# u8 *out, /* Plaintext output. Decrypt in-place is allowed. */
# const u8 *in, /* Ciphertext input */
# u64 plaintext_len) /* Length of data in Bytes for encryption. */
###############################################################################
SYM_FUNC_START(aesni_gcm_dec_update_avx_gen4)
FUNC_SAVE
mov keysize,%eax
cmp $32, %eax
je key_256_dec_update4
cmp $16, %eax
je key_128_dec_update4
# must be 192
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, DEC, 11
FUNC_RESTORE
RET
key_128_dec_update4:
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, DEC, 9
FUNC_RESTORE
RET
key_256_dec_update4:
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, DEC, 13
FUNC_RESTORE
RET
SYM_FUNC_END(aesni_gcm_dec_update_avx_gen4)
###############################################################################
#void aesni_gcm_finalize_avx_gen4(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# gcm_context_data *data,
# u8 *auth_tag, /* Authenticated Tag output. */
# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
# Valid values are 16 (most likely), 12 or 8. */
###############################################################################
SYM_FUNC_START(aesni_gcm_finalize_avx_gen4)
FUNC_SAVE
mov keysize,%eax
cmp $32, %eax
je key_256_finalize4
cmp $16, %eax
je key_128_finalize4
# must be 192
GCM_COMPLETE GHASH_MUL_AVX2, 11, arg3, arg4
FUNC_RESTORE
RET
key_128_finalize4:
GCM_COMPLETE GHASH_MUL_AVX2, 9, arg3, arg4
FUNC_RESTORE
RET
key_256_finalize4:
GCM_COMPLETE GHASH_MUL_AVX2, 13, arg3, arg4
FUNC_RESTORE
RET
SYM_FUNC_END