/*
* Implement AES algorithm in Intel AES-NI instructions.
*
* The white paper of AES-NI instructions can be downloaded from:
* http://softwarecommunity.intel.com/isn/downloads/intelavx/AES-Instructions-Set_WP.pdf
*
* Copyright (C) 2008, Intel Corp.
* Author: Huang Ying <ying.huang@intel.com>
* Vinodh Gopal <vinodh.gopal@intel.com>
* Kahraman Akdemir
*
* Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
* interface for 64-bit kernels.
* Authors: Erdinc Ozturk (erdinc.ozturk@intel.com)
* Aidan O'Mahony (aidan.o.mahony@intel.com)
* Adrian Hoban <adrian.hoban@intel.com>
* James Guilford (james.guilford@intel.com)
* Gabriele Paoloni <gabriele.paoloni@intel.com>
* Tadeusz Struk (tadeusz.struk@intel.com)
* Wajdi Feghali (wajdi.k.feghali@intel.com)
* Copyright (c) 2010, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/linkage.h>
#include <asm/inst.h>
.data
POLY: .octa 0xC2000000000000000000000000000001
TWOONE: .octa 0x00000001000000000000000000000001
# order of these constants should not change.
# more specifically, ALL_F should follow SHIFT_MASK,
# and ZERO should follow ALL_F
SHUF_MASK: .octa 0x000102030405060708090A0B0C0D0E0F
MASK1: .octa 0x0000000000000000ffffffffffffffff
MASK2: .octa 0xffffffffffffffff0000000000000000
SHIFT_MASK: .octa 0x0f0e0d0c0b0a09080706050403020100
ALL_F: .octa 0xffffffffffffffffffffffffffffffff
ZERO: .octa 0x00000000000000000000000000000000
ONE: .octa 0x00000000000000000000000000000001
F_MIN_MASK: .octa 0xf1f2f3f4f5f6f7f8f9fafbfcfdfeff0
dec: .octa 0x1
enc: .octa 0x2
.text
#define STACK_OFFSET 8*3
#define HashKey 16*0 // store HashKey <<1 mod poly here
#define HashKey_2 16*1 // store HashKey^2 <<1 mod poly here
#define HashKey_3 16*2 // store HashKey^3 <<1 mod poly here
#define HashKey_4 16*3 // store HashKey^4 <<1 mod poly here
#define HashKey_k 16*4 // store XOR of High 64 bits and Low 64
// bits of HashKey <<1 mod poly here
//(for Karatsuba purposes)
#define HashKey_2_k 16*5 // store XOR of High 64 bits and Low 64
// bits of HashKey^2 <<1 mod poly here
// (for Karatsuba purposes)
#define HashKey_3_k 16*6 // store XOR of High 64 bits and Low 64
// bits of HashKey^3 <<1 mod poly here
// (for Karatsuba purposes)
#define HashKey_4_k 16*7 // store XOR of High 64 bits and Low 64
// bits of HashKey^4 <<1 mod poly here
// (for Karatsuba purposes)
#define VARIABLE_OFFSET 16*8
#define arg1 rdi
#define arg2 rsi
#define arg3 rdx
#define arg4 rcx
#define arg5 r8
#define arg6 r9
#define arg7 STACK_OFFSET+8(%r14)
#define arg8 STACK_OFFSET+16(%r14)
#define arg9 STACK_OFFSET+24(%r14)
#define arg10 STACK_OFFSET+32(%r14)
#define STATE1 %xmm0
#define STATE2 %xmm4
#define STATE3 %xmm5
#define STATE4 %xmm6
#define STATE STATE1
#define IN1 %xmm1
#define IN2 %xmm7
#define IN3 %xmm8
#define IN4 %xmm9
#define IN IN1
#define KEY %xmm2
#define IV %xmm3
#define BSWAP_MASK %xmm10
#define CTR %xmm11
#define INC %xmm12
#define KEYP %rdi
#define OUTP %rsi
#define INP %rdx
#define LEN %rcx
#define IVP %r8
#define KLEN %r9d
#define T1 %r10
#define TKEYP T1
#define T2 %r11
#define TCTR_LOW T2
/* 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 GH HK TMP1 TMP2 TMP3 TMP4 TMP5
movdqa \GH, \TMP1
pshufd $78, \GH, \TMP2
pshufd $78, \HK, \TMP3
pxor \GH, \TMP2 # TMP2 = a1+a0
pxor \HK, \TMP3 # TMP3 = b1+b0
PCLMULQDQ 0x11, \HK, \TMP1 # TMP1 = a1*b1
PCLMULQDQ 0x00, \HK, \GH # GH = a0*b0
PCLMULQDQ 0x00, \TMP3, \TMP2 # TMP2 = (a0+a1)*(b1+b0)
pxor \GH, \TMP2
pxor \TMP1, \TMP2 # TMP2 = (a0*b0)+(a1*b0)
movdqa \TMP2, \TMP3
pslldq $8, \TMP3 # left shift TMP3 2 DWs
psrldq $8, \TMP2 # right shift TMP2 2 DWs
pxor \TMP3, \GH
pxor \TMP2, \TMP1 # TMP2:GH holds the result of GH*HK
# first phase of the reduction
movdqa \GH, \TMP2
movdqa \GH, \TMP3
movdqa \GH, \TMP4 # copy GH into TMP2,TMP3 and TMP4
# in in order to perform
# independent shifts
pslld $31, \TMP2 # packed right shift <<31
pslld $30, \TMP3 # packed right shift <<30
pslld $25, \TMP4 # packed right shift <<25
pxor \TMP3, \TMP2 # xor the shifted versions
pxor \TMP4, \TMP2
movdqa \TMP2, \TMP5
psrldq $4, \TMP5 # right shift TMP5 1 DW
pslldq $12, \TMP2 # left shift TMP2 3 DWs
pxor \TMP2, \GH
# second phase of the reduction
movdqa \GH,\TMP2 # copy GH into TMP2,TMP3 and TMP4
# in in order to perform
# independent shifts
movdqa \GH,\TMP3
movdqa \GH,\TMP4
psrld $1,\TMP2 # packed left shift >>1
psrld $2,\TMP3 # packed left shift >>2
psrld $7,\TMP4 # packed left shift >>7
pxor \TMP3,\TMP2 # xor the shifted versions
pxor \TMP4,\TMP2
pxor \TMP5, \TMP2
pxor \TMP2, \GH
pxor \TMP1, \GH # result is in TMP1
.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, %xmm5, %xmm6, %xmm7, %xmm8, %xmm9 registers
* are clobbered
* arg1, %arg2, %arg3, %r14 are used as a pointer only, not modified
*/
.macro INITIAL_BLOCKS num_initial_blocks TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
mov arg7, %r10 # %r10 = AAD
mov arg8, %r12 # %r12 = aadLen
mov %r12, %r11
pxor %xmm\i, %xmm\i
_get_AAD_loop\num_initial_blocks\operation:
movd (%r10), \TMP1
pslldq $12, \TMP1
psrldq $4, %xmm\i
pxor \TMP1, %xmm\i
add $4, %r10
sub $4, %r12
jne _get_AAD_loop\num_initial_blocks\operation
cmp $16, %r11
je _get_AAD_loop2_done\num_initial_blocks\operation
mov $16, %r12
_get_AAD_loop2\num_initial_blocks\operation:
psrldq $4, %xmm\i
sub $4, %r12
cmp %r11, %r12
jne _get_AAD_loop2\num_initial_blocks\operation
_get_AAD_loop2_done\num_initial_blocks\operation:
pshufb SHUF_MASK(%rip), %xmm\i # byte-reflect the AAD data
xor %r11, %r11 # initialise the data pointer offset as zero
# start AES for num_initial_blocks blocks
mov %arg5, %rax # %rax = *Y0
movdqu (%rax), \XMM0 # XMM0 = Y0
pshufb SHUF_MASK(%rip), \XMM0
.if \i_seq != 0
.irpc index, \i_seq
paddd ONE(%rip), \XMM0 # INCR Y0
movdqa \XMM0, %xmm\index
pshufb SHUF_MASK(%rip), %xmm\index # perform a 16 byte swap
.endr
.irpc index, \i_seq
pxor 16*0(%arg1), %xmm\index
.endr
.irpc index, \i_seq
movaps 0x10(%rdi), \TMP1
AESENC \TMP1, %xmm\index # Round 1
.endr
.irpc index, \i_seq
movaps 0x20(%arg1), \TMP1
AESENC \TMP1, %xmm\index # Round 2
.endr
.irpc index, \i_seq
movaps 0x30(%arg1), \TMP1
AESENC \TMP1, %xmm\index # Round 2
.endr
.irpc index, \i_seq
movaps 0x40(%arg1), \TMP1
AESENC \TMP1, %xmm\index # Round 2
.endr
.irpc index, \i_seq
movaps 0x50(%arg1), \TMP1
AESENC \TMP1, %xmm\index # Round 2
.endr
.irpc index, \i_seq
movaps 0x60(%arg1), \TMP1
AESENC \TMP1, %xmm\index # Round 2
.endr
.irpc index, \i_seq
movaps 0x70(%arg1), \TMP1
AESENC \TMP1, %xmm\index # Round 2
.endr
.irpc index, \i_seq
movaps 0x80(%arg1), \TMP1
AESENC \TMP1, %xmm\index # Round 2
.endr
.irpc index, \i_seq
movaps 0x90(%arg1), \TMP1
AESENC \TMP1, %xmm\index # Round 2
.endr
.irpc index, \i_seq
movaps 0xa0(%arg1), \TMP1
AESENCLAST \TMP1, %xmm\index # Round 10
.endr
.irpc index, \i_seq
movdqu (%arg3 , %r11, 1), \TMP1
pxor \TMP1, %xmm\index
movdqu %xmm\index, (%arg2 , %r11, 1)
# write back plaintext/ciphertext for num_initial_blocks
add $16, %r11
.if \operation == dec
movdqa \TMP1, %xmm\index
.endif
pshufb SHUF_MASK(%rip), %xmm\index
# prepare plaintext/ciphertext for GHASH computation
.endr
.endif
GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
# apply GHASH on num_initial_blocks blocks
.if \i == 5
pxor %xmm5, %xmm6
GHASH_MUL %xmm6, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
pxor %xmm6, %xmm7
GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
pxor %xmm7, %xmm8
GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
.elseif \i == 6
pxor %xmm6, %xmm7
GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
pxor %xmm7, %xmm8
GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
.elseif \i == 7
pxor %xmm7, %xmm8
GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
.endif
cmp $64, %r13
jl _initial_blocks_done\num_initial_blocks\operation
# no need for precomputed values
/*
*
* Precomputations for HashKey parallel with encryption of first 4 blocks.
* Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
*/
paddd ONE(%rip), \XMM0 # INCR Y0
movdqa \XMM0, \XMM1
pshufb SHUF_MASK(%rip), \XMM1 # perform a 16 byte swap
paddd ONE(%rip), \XMM0 # INCR Y0
movdqa \XMM0, \XMM2
pshufb SHUF_MASK(%rip), \XMM2 # perform a 16 byte swap
paddd ONE(%rip), \XMM0 # INCR Y0
movdqa \XMM0, \XMM3
pshufb SHUF_MASK(%rip), \XMM3 # perform a 16 byte swap
paddd ONE(%rip), \XMM0 # INCR Y0
movdqa \XMM0, \XMM4
pshufb SHUF_MASK(%rip), \XMM4 # perform a 16 byte swap
pxor 16*0(%arg1), \XMM1
pxor 16*0(%arg1), \XMM2
pxor 16*0(%arg1), \XMM3
pxor 16*0(%arg1), \XMM4
movdqa \TMP3, \TMP5
pshufd $78, \TMP3, \TMP1
pxor \TMP3, \TMP1
movdqa \TMP1, HashKey_k(%rsp)
GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
# TMP5 = HashKey^2<<1 (mod poly)
movdqa \TMP5, HashKey_2(%rsp)
# HashKey_2 = HashKey^2<<1 (mod poly)
pshufd $78, \TMP5, \TMP1
pxor \TMP5, \TMP1
movdqa \TMP1, HashKey_2_k(%rsp)
.irpc index, 1234 # do 4 rounds
movaps 0x10*\index(%arg1), \TMP1
AESENC \TMP1, \XMM1
AESENC \TMP1, \XMM2
AESENC \TMP1, \XMM3
AESENC \TMP1, \XMM4
.endr
GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
# TMP5 = HashKey^3<<1 (mod poly)
movdqa \TMP5, HashKey_3(%rsp)
pshufd $78, \TMP5, \TMP1
pxor \TMP5, \TMP1
movdqa \TMP1, HashKey_3_k(%rsp)
.irpc index, 56789 # do next 5 rounds
movaps 0x10*\index(%arg1), \TMP1
AESENC \TMP1, \XMM1
AESENC \TMP1, \XMM2
AESENC \TMP1, \XMM3
AESENC \TMP1, \XMM4
.endr
GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
# TMP5 = HashKey^3<<1 (mod poly)
movdqa \TMP5, HashKey_4(%rsp)
pshufd $78, \TMP5, \TMP1
pxor \TMP5, \TMP1
movdqa \TMP1, HashKey_4_k(%rsp)
movaps 0xa0(%arg1), \TMP2
AESENCLAST \TMP2, \XMM1
AESENCLAST \TMP2, \XMM2
AESENCLAST \TMP2, \XMM3
AESENCLAST \TMP2, \XMM4
movdqu 16*0(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM1
.if \operation == dec
movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM1
.endif
movdqu 16*1(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM2
.if \operation == dec
movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM2
.endif
movdqu 16*2(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM3
.if \operation == dec
movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM3
.endif
movdqu 16*3(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM4
.if \operation == dec
movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM4
.else
movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
.endif
add $64, %r11
pshufb SHUF_MASK(%rip), \XMM1 # perform a 16 byte swap
pxor \XMMDst, \XMM1
# combine GHASHed value with the corresponding ciphertext
pshufb SHUF_MASK(%rip), \XMM2 # perform a 16 byte swap
pshufb SHUF_MASK(%rip), \XMM3 # perform a 16 byte swap
pshufb SHUF_MASK(%rip), \XMM4 # perform a 16 byte swap
_initial_blocks_done\num_initial_blocks\operation:
.endm
/*
* encrypt 4 blocks at a time
* ghash the 4 previously encrypted ciphertext blocks
* arg1, %arg2, %arg3 are used as pointers only, not modified
* %r11 is the data offset value
*/
.macro GHASH_4_ENCRYPT_4_PARALLEL TMP1 TMP2 TMP3 TMP4 TMP5 \
TMP6 XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 operation
movdqa \XMM1, \XMM5
movdqa \XMM2, \XMM6
movdqa \XMM3, \XMM7
movdqa \XMM4, \XMM8
# multiply TMP5 * HashKey using karatsuba
movdqa \XMM5, \TMP4
pshufd $78, \XMM5, \TMP6
pxor \XMM5, \TMP6
paddd ONE(%rip), \XMM0 # INCR CNT
movdqa HashKey_4(%rsp), \TMP5
PCLMULQDQ 0x11, \TMP5, \TMP4 # TMP4 = a1*b1
movdqa \XMM0, \XMM1
paddd ONE(%rip), \XMM0 # INCR CNT
movdqa \XMM0, \XMM2
paddd ONE(%rip), \XMM0 # INCR CNT
movdqa \XMM0, \XMM3
paddd ONE(%rip), \XMM0 # INCR CNT
movdqa \XMM0, \XMM4
pshufb SHUF_MASK(%rip), \XMM1 # perform a 16 byte swap
PCLMULQDQ 0x00, \TMP5, \XMM5 # XMM5 = a0*b0
pshufb SHUF_MASK(%rip), \XMM2 # perform a 16 byte swap
pshufb SHUF_MASK(%rip), \XMM3 # perform a 16 byte swap
pshufb SHUF_MASK(%rip), \XMM4 # perform a 16 byte swap
pxor (%arg1), \XMM1
pxor (%arg1), \XMM2
pxor (%arg1), \XMM3
pxor (%arg1), \XMM4
movdqa HashKey_4_k(%rsp), \TMP5
PCLMULQDQ 0x00, \TMP5, \TMP6 # TMP6 = (a1+a0)*(b1+b0)
movaps 0x10(%arg1), \TMP1
AESENC \TMP1, \XMM1 # Round 1
AESENC \TMP1, \XMM2
AESENC \TMP1, \XMM3
AESENC \TMP1, \XMM4
movaps 0x20(%arg1), \TMP1
AESENC \TMP1, \XMM1 # Round 2
AESENC \TMP1, \XMM2
AESENC \TMP1, \XMM3
AESENC \TMP1, \XMM4
movdqa \XMM6, \TMP1
pshufd $78, \XMM6, \TMP2
pxor \XMM6, \TMP2
movdqa HashKey_3(%rsp), \TMP5
PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1 * b1
movaps 0x30(%arg1), \TMP3
AESENC \TMP3, \XMM1 # Round 3
AESENC \TMP3, \XMM2
AESENC \TMP3, \XMM3
AESENC \TMP3, \XMM4
PCLMULQDQ 0x00, \TMP5, \XMM6 # XMM6 = a0*b0
movaps 0x40(%arg1), \TMP3
AESENC \TMP3, \XMM1 # Round 4
AESENC \TMP3, \XMM2
AESENC \TMP3, \XMM3
AESENC \TMP3, \XMM4
movdqa HashKey_3_k(%rsp), \TMP5
PCLMULQDQ 0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
movaps 0x50(%arg1), \TMP3
AESENC \TMP3, \XMM1 # Round 5
AESENC \TMP3, \XMM2
AESENC \TMP3, \XMM3
AESENC \TMP3, \XMM4
pxor \TMP1, \TMP4
# accumulate the results in TMP4:XMM5, TMP6 holds the middle part
pxor \XMM6, \XMM5
pxor \TMP2, \TMP6
movdqa \XMM7, \TMP1
pshufd $78, \XMM7, \TMP2
pxor \XMM7, \TMP2
movdqa HashKey_2(%rsp ), \TMP5
# Multiply TMP5 * HashKey using karatsuba
PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
movaps 0x60(%arg1), \TMP3
AESENC \TMP3, \XMM1 # Round 6
AESENC \TMP3, \XMM2
AESENC \TMP3, \XMM3
AESENC \TMP3, \XMM4
PCLMULQDQ 0x00, \TMP5, \XMM7 # XMM7 = a0*b0
movaps 0x70(%arg1), \TMP3
AESENC \TMP3, \XMM1 # Round 7
AESENC \TMP3, \XMM2
AESENC \TMP3, \XMM3
AESENC \TMP3, \XMM4
movdqa HashKey_2_k(%rsp), \TMP5
PCLMULQDQ 0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
movaps 0x80(%arg1), \TMP3
AESENC \TMP3, \XMM1 # Round 8
AESENC \TMP3, \XMM2
AESENC \TMP3, \XMM3
AESENC \TMP3, \XMM4
pxor \TMP1, \TMP4
# accumulate the results in TMP4:XMM5, TMP6 holds the middle part
pxor \XMM7, \XMM5
pxor \TMP2, \TMP6
# Multiply XMM8 * HashKey
# XMM8 and TMP5 hold the values for the two operands
movdqa \XMM8, \TMP1
pshufd $78, \XMM8, \TMP2
pxor \XMM8, \TMP2
movdqa HashKey(%rsp), \TMP5
PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
movaps 0x90(%arg1), \TMP3
AESENC \TMP3, \XMM1 # Round 9
AESENC \TMP3, \XMM2
AESENC \TMP3, \XMM3
AESENC \TMP3, \XMM4
PCLMULQDQ 0x00, \TMP5, \XMM8 # XMM8 = a0*b0
movaps 0xa0(%arg1), \TMP3
AESENCLAST \TMP3, \XMM1 # Round 10
AESENCLAST \TMP3, \XMM2
AESENCLAST \TMP3, \XMM3
AESENCLAST \TMP3, \XMM4
movdqa HashKey_k(%rsp), \TMP5
PCLMULQDQ 0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
movdqu (%arg3,%r11,1), \TMP3
pxor \TMP3, \XMM1 # Ciphertext/Plaintext XOR EK
.if \operation == dec
movdqu \XMM1, (%arg2,%r11,1) # Write to plaintext buffer
movdqa \TMP3, \XMM1
.endif
movdqu 16(%arg3,%r11,1), \TMP3
pxor \TMP3, \XMM2 # Ciphertext/Plaintext XOR EK
.if \operation == dec
movdqu \XMM2, 16(%arg2,%r11,1) # Write to plaintext buffer
movdqa \TMP3, \XMM2
.endif
movdqu 32(%arg3,%r11,1), \TMP3
pxor \TMP3, \XMM3 # Ciphertext/Plaintext XOR EK
.if \operation == dec
movdqu \XMM3, 32(%arg2,%r11,1) # Write to plaintext buffer
movdqa \TMP3, \XMM3
.endif
movdqu 48(%arg3,%r11,1), \TMP3
pxor \TMP3, \XMM4 # Ciphertext/Plaintext XOR EK
.if \operation == dec
movdqu \XMM4, 48(%arg2,%r11,1) # Write to plaintext buffer
movdqa \TMP3, \XMM4
.else
movdqu \XMM1, (%arg2,%r11,1) # Write to the ciphertext buffer
movdqu \XMM2, 16(%arg2,%r11,1) # Write to the ciphertext buffer
movdqu \XMM3, 32(%arg2,%r11,1) # Write to the ciphertext buffer
movdqu \XMM4, 48(%arg2,%r11,1) # Write to the ciphertext buffer
.endif
pshufb SHUF_MASK(%rip), \XMM1 # perform a 16 byte swap
pshufb SHUF_MASK(%rip), \XMM2 # perform a 16 byte swap
pshufb SHUF_MASK(%rip), \XMM3 # perform a 16 byte swap
pshufb SHUF_MASK(%rip), \XMM4 # perform a 16 byte sway
pxor \TMP4, \TMP1
pxor \XMM8, \XMM5
pxor \TMP6, \TMP2
pxor \TMP1, \TMP2
pxor \XMM5, \TMP2
movdqa \TMP2, \TMP3
pslldq $8, \TMP3 # left shift TMP3 2 DWs
psrldq $8, \TMP2 # right shift TMP2 2 DWs
pxor \TMP3, \XMM5
pxor \TMP2, \TMP1 # accumulate the results in TMP1:XMM5
# first phase of reduction
movdqa \XMM5, \TMP2
movdqa \XMM5, \TMP3
movdqa \XMM5, \TMP4
# move XMM5 into TMP2, TMP3, TMP4 in order to perform shifts independently
pslld $31, \TMP2 # packed right shift << 31
pslld $30, \TMP3 # packed right shift << 30
pslld $25, \TMP4 # packed right shift << 25
pxor \TMP3, \TMP2 # xor the shifted versions
pxor \TMP4, \TMP2
movdqa \TMP2, \TMP5
psrldq $4, \TMP5 # right shift T5 1 DW
pslldq $12, \TMP2 # left shift T2 3 DWs
pxor \TMP2, \XMM5
# second phase of reduction
movdqa \XMM5,\TMP2 # make 3 copies of XMM5 into TMP2, TMP3, TMP4
movdqa \XMM5,\TMP3
movdqa \XMM5,\TMP4
psrld $1, \TMP2 # packed left shift >>1
psrld $2, \TMP3 # packed left shift >>2
psrld $7, \TMP4 # packed left shift >>7
pxor \TMP3,\TMP2 # xor the shifted versions
pxor \TMP4,\TMP2
pxor \TMP5, \TMP2
pxor \TMP2, \XMM5
pxor \TMP1, \XMM5 # result is in TMP1
pxor \XMM5, \XMM1
.endm
/* GHASH the last 4 ciphertext blocks. */
.macro GHASH_LAST_4 TMP1 TMP2 TMP3 TMP4 TMP5 TMP6 \
TMP7 XMM1 XMM2 XMM3 XMM4 XMMDst
# Multiply TMP6 * HashKey (using Karatsuba)
movdqa \XMM1, \TMP6
pshufd $78, \XMM1, \TMP2
pxor \XMM1, \TMP2
movdqa HashKey_4(%rsp), \TMP5
PCLMULQDQ 0x11, \TMP5, \TMP6 # TMP6 = a1*b1
PCLMULQDQ 0x00, \TMP5, \XMM1 # XMM1 = a0*b0
movdqa HashKey_4_k(%rsp), \TMP4
PCLMULQDQ 0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
movdqa \XMM1, \XMMDst
movdqa \TMP2, \XMM1 # result in TMP6, XMMDst, XMM1
# Multiply TMP1 * HashKey (using Karatsuba)
movdqa \XMM2, \TMP1
pshufd $78, \XMM2, \TMP2
pxor \XMM2, \TMP2
movdqa HashKey_3(%rsp), \TMP5
PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
PCLMULQDQ 0x00, \TMP5, \XMM2 # XMM2 = a0*b0
movdqa HashKey_3_k(%rsp), \TMP4
PCLMULQDQ 0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
pxor \TMP1, \TMP6
pxor \XMM2, \XMMDst
pxor \TMP2, \XMM1
# results accumulated in TMP6, XMMDst, XMM1
# Multiply TMP1 * HashKey (using Karatsuba)
movdqa \XMM3, \TMP1
pshufd $78, \XMM3, \TMP2
pxor \XMM3, \TMP2
movdqa HashKey_2(%rsp), \TMP5
PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
PCLMULQDQ 0x00, \TMP5, \XMM3 # XMM3 = a0*b0
movdqa HashKey_2_k(%rsp), \TMP4
PCLMULQDQ 0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
pxor \TMP1, \TMP6
pxor \XMM3, \XMMDst
pxor \TMP2, \XMM1 # results accumulated in TMP6, XMMDst, XMM1
# Multiply TMP1 * HashKey (using Karatsuba)
movdqa \XMM4, \TMP1
pshufd $78, \XMM4, \TMP2
pxor \XMM4, \TMP2
movdqa HashKey(%rsp), \TMP5
PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
PCLMULQDQ 0x00, \TMP5, \XMM4 # XMM4 = a0*b0
movdqa HashKey_k(%rsp), \TMP4
PCLMULQDQ 0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
pxor \TMP1, \TMP6
pxor \XMM4, \XMMDst
pxor \XMM1, \TMP2
pxor \TMP6, \TMP2
pxor \XMMDst, \TMP2
# middle section of the temp results combined as in karatsuba algorithm
movdqa \TMP2, \TMP4
pslldq $8, \TMP4 # left shift TMP4 2 DWs
psrldq $8, \TMP2 # right shift TMP2 2 DWs
pxor \TMP4, \XMMDst
pxor \TMP2, \TMP6
# TMP6:XMMDst holds the result of the accumulated carry-less multiplications
# first phase of the reduction
movdqa \XMMDst, \TMP2
movdqa \XMMDst, \TMP3
movdqa \XMMDst, \TMP4
# move XMMDst into TMP2, TMP3, TMP4 in order to perform 3 shifts independently
pslld $31, \TMP2 # packed right shifting << 31
pslld $30, \TMP3 # packed right shifting << 30
pslld $25, \TMP4 # packed right shifting << 25
pxor \TMP3, \TMP2 # xor the shifted versions
pxor \TMP4, \TMP2
movdqa \TMP2, \TMP7
psrldq $4, \TMP7 # right shift TMP7 1 DW
pslldq $12, \TMP2 # left shift TMP2 3 DWs
pxor \TMP2, \XMMDst
# second phase of the reduction
movdqa \XMMDst, \TMP2
# make 3 copies of XMMDst for doing 3 shift operations
movdqa \XMMDst, \TMP3
movdqa \XMMDst, \TMP4
psrld $1, \TMP2 # packed left shift >> 1
psrld $2, \TMP3 # packed left shift >> 2
psrld $7, \TMP4 # packed left shift >> 7
pxor \TMP3, \TMP2 # xor the shifted versions
pxor \TMP4, \TMP2
pxor \TMP7, \TMP2
pxor \TMP2, \XMMDst
pxor \TMP6, \XMMDst # reduced result is in XMMDst
.endm
/* Encryption of a single block done*/
.macro ENCRYPT_SINGLE_BLOCK XMM0 TMP1
pxor (%arg1), \XMM0
movaps 16(%arg1), \TMP1
AESENC \TMP1, \XMM0
movaps 32(%arg1), \TMP1
AESENC \TMP1, \XMM0
movaps 48(%arg1), \TMP1
AESENC \TMP1, \XMM0
movaps 64(%arg1), \TMP1
AESENC \TMP1, \XMM0
movaps 80(%arg1), \TMP1
AESENC \TMP1, \XMM0
movaps 96(%arg1), \TMP1
AESENC \TMP1, \XMM0
movaps 112(%arg1), \TMP1
AESENC \TMP1, \XMM0
movaps 128(%arg1), \TMP1
AESENC \TMP1, \XMM0
movaps 144(%arg1), \TMP1
AESENC \TMP1, \XMM0
movaps 160(%arg1), \TMP1
AESENCLAST \TMP1, \XMM0
.endm
/*****************************************************************************
* void aesni_gcm_dec(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary.
* u8 *out, // Plaintext output. Encrypt in-place is allowed.
* const u8 *in, // Ciphertext input
* u64 plaintext_len, // Length of data in bytes for decryption.
* 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
* u8 *auth_tag, // Authenticated Tag output. The driver will compare this to the
* // given authentication tag and only return the plaintext if they match.
* u64 auth_tag_len); // Authenticated Tag Length in bytes. Valid values are 16
* // (most likely), 12 or 8.
*
* Assumptions:
*
* keys:
* keys are pre-expanded and aligned to 16 bytes. we are using the first
* set of 11 keys in the data structure void *aes_ctx
*
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* 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 supports 16 too but for other sizes, the code will fail.
*
* TLen:
* from the definition of the spec, TLen can only be 8, 12 or 16 bytes.
* For other sizes, the code will fail.
*
* poly = x^128 + x^127 + x^126 + x^121 + 1
*
*****************************************************************************/
ENTRY(aesni_gcm_dec)
push %r12
push %r13
push %r14
mov %rsp, %r14
/*
* states of %xmm registers %xmm6:%xmm15 not saved
* all %xmm registers are clobbered
*/
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp # align rsp to 64 bytes
mov %arg6, %r12
movdqu (%r12), %xmm13 # %xmm13 = HashKey
pshufb SHUF_MASK(%rip), %xmm13
# Precompute HashKey<<1 (mod poly) from the hash key (required for GHASH)
movdqa %xmm13, %xmm2
psllq $1, %xmm13
psrlq $63, %xmm2
movdqa %xmm2, %xmm1
pslldq $8, %xmm2
psrldq $8, %xmm1
por %xmm2, %xmm13
# Reduction
pshufd $0x24, %xmm1, %xmm2
pcmpeqd TWOONE(%rip), %xmm2
pand POLY(%rip), %xmm2
pxor %xmm2, %xmm13 # %xmm13 holds the HashKey<<1 (mod poly)
# Decrypt first few blocks
movdqa %xmm13, HashKey(%rsp) # store HashKey<<1 (mod poly)
mov %arg4, %r13 # save the number of bytes of plaintext/ciphertext
and $-16, %r13 # %r13 = %r13 - (%r13 mod 16)
mov %r13, %r12
and $(3<<4), %r12
jz _initial_num_blocks_is_0_decrypt
cmp $(2<<4), %r12
jb _initial_num_blocks_is_1_decrypt
je _initial_num_blocks_is_2_decrypt
_initial_num_blocks_is_3_decrypt:
INITIAL_BLOCKS 3, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, dec
sub $48, %r13
jmp _initial_blocks_decrypted
_initial_num_blocks_is_2_decrypt:
INITIAL_BLOCKS 2, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, dec
sub $32, %r13
jmp _initial_blocks_decrypted
_initial_num_blocks_is_1_decrypt:
INITIAL_BLOCKS 1, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, dec
sub $16, %r13
jmp _initial_blocks_decrypted
_initial_num_blocks_is_0_decrypt:
INITIAL_BLOCKS 0, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, dec
_initial_blocks_decrypted:
cmp $0, %r13
je _zero_cipher_left_decrypt
sub $64, %r13
je _four_cipher_left_decrypt
_decrypt_by_4:
GHASH_4_ENCRYPT_4_PARALLEL %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, \
%xmm14, %xmm0, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, dec
add $64, %r11
sub $64, %r13
jne _decrypt_by_4
_four_cipher_left_decrypt:
GHASH_LAST_4 %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, \
%xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm8
_zero_cipher_left_decrypt:
mov %arg4, %r13
and $15, %r13 # %r13 = arg4 (mod 16)
je _multiple_of_16_bytes_decrypt
# Handle the last <16 byte block seperately
paddd ONE(%rip), %xmm0 # increment CNT to get Yn
pshufb SHUF_MASK(%rip), %xmm0
ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # E(K, Yn)
sub $16, %r11
add %r13, %r11
movdqu (%arg3,%r11,1), %xmm1 # recieve the last <16 byte block
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)
movdqu (%r12), %xmm2 # get the appropriate shuffle mask
pshufb %xmm2, %xmm1 # right shift 16-%r13 butes
movdqa %xmm1, %xmm2
pxor %xmm1, %xmm0 # Ciphertext XOR E(K, Yn)
movdqu ALL_F-SHIFT_MASK(%r12), %xmm1
# get the appropriate mask to mask out top 16-%r13 bytes of %xmm0
pand %xmm1, %xmm0 # mask out top 16-%r13 bytes of %xmm0
pand %xmm1, %xmm2
pshufb SHUF_MASK(%rip),%xmm2
pxor %xmm2, %xmm8
GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
# GHASH computation for the last <16 byte block
sub %r13, %r11
add $16, %r11
# output %r13 bytes
movq %xmm0, %rax
cmp $8, %r13
jle _less_than_8_bytes_left_decrypt
mov %rax, (%arg2 , %r11, 1)
add $8, %r11
psrldq $8, %xmm0
movq %xmm0, %rax
sub $8, %r13
_less_than_8_bytes_left_decrypt:
mov %al, (%arg2, %r11, 1)
add $1, %r11
shr $8, %rax
sub $1, %r13
jne _less_than_8_bytes_left_decrypt
_multiple_of_16_bytes_decrypt:
mov arg8, %r12 # %r13 = aadLen (number of bytes)
shl $3, %r12 # convert into number of bits
movd %r12d, %xmm15 # len(A) in %xmm15
shl $3, %arg4 # len(C) in bits (*128)
movq %arg4, %xmm1
pslldq $8, %xmm15 # %xmm15 = len(A)||0x0000000000000000
pxor %xmm1, %xmm15 # %xmm15 = len(A)||len(C)
pxor %xmm15, %xmm8
GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
# final GHASH computation
pshufb SHUF_MASK(%rip), %xmm8
mov %arg5, %rax # %rax = *Y0
movdqu (%rax), %xmm0 # %xmm0 = Y0
ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # E(K, Y0)
pxor %xmm8, %xmm0
_return_T_decrypt:
mov arg9, %r10 # %r10 = authTag
mov arg10, %r11 # %r11 = auth_tag_len
cmp $16, %r11
je _T_16_decrypt
cmp $12, %r11
je _T_12_decrypt
_T_8_decrypt:
movq %xmm0, %rax
mov %rax, (%r10)
jmp _return_T_done_decrypt
_T_12_decrypt:
movq %xmm0, %rax
mov %rax, (%r10)
psrldq $8, %xmm0
movd %xmm0, %eax
mov %eax, 8(%r10)
jmp _return_T_done_decrypt
_T_16_decrypt:
movdqu %xmm0, (%r10)
_return_T_done_decrypt:
mov %r14, %rsp
pop %r14
pop %r13
pop %r12
ret
/*****************************************************************************
* void aesni_gcm_enc(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary.
* u8 *out, // Ciphertext output. Encrypt in-place is allowed.
* const u8 *in, // Plaintext input
* u64 plaintext_len, // Length of data in bytes for encryption.
* 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
* u8 *auth_tag, // Authenticated Tag output.
* u64 auth_tag_len); // Authenticated Tag Length in bytes. Valid values are 16 (most likely),
* // 12 or 8.
*
* Assumptions:
*
* keys:
* keys are pre-expanded and aligned to 16 bytes. we are using the
* first set of 11 keys in the data structure void *aes_ctx
*
*
* 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 supports 16 too but for other sizes, the code will fail.
*
* TLen:
* from the definition of the spec, TLen can only be 8, 12 or 16 bytes.
* For other sizes, the code will fail.
*
* poly = x^128 + x^127 + x^126 + x^121 + 1
***************************************************************************/
ENTRY(aesni_gcm_enc)
push %r12
push %r13
push %r14
mov %rsp, %r14
#
# states of %xmm registers %xmm6:%xmm15 not saved
# all %xmm registers are clobbered
#
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp
mov %arg6, %r12
movdqu (%r12), %xmm13
pshufb SHUF_MASK(%rip), %xmm13
# precompute HashKey<<1 mod poly from the HashKey (required for GHASH)
movdqa %xmm13, %xmm2
psllq $1, %xmm13
psrlq $63, %xmm2
movdqa %xmm2, %xmm1
pslldq $8, %xmm2
psrldq $8, %xmm1
por %xmm2, %xmm13
# reduce HashKey<<1
pshufd $0x24, %xmm1, %xmm2
pcmpeqd TWOONE(%rip), %xmm2
pand POLY(%rip), %xmm2
pxor %xmm2, %xmm13
movdqa %xmm13, HashKey(%rsp)
mov %arg4, %r13 # %xmm13 holds HashKey<<1 (mod poly)
and $-16, %r13
mov %r13, %r12
# Encrypt first few blocks
and $(3<<4), %r12
jz _initial_num_blocks_is_0_encrypt
cmp $(2<<4), %r12
jb _initial_num_blocks_is_1_encrypt
je _initial_num_blocks_is_2_encrypt
_initial_num_blocks_is_3_encrypt:
INITIAL_BLOCKS 3, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, enc
sub $48, %r13
jmp _initial_blocks_encrypted
_initial_num_blocks_is_2_encrypt:
INITIAL_BLOCKS 2, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, enc
sub $32, %r13
jmp _initial_blocks_encrypted
_initial_num_blocks_is_1_encrypt:
INITIAL_BLOCKS 1, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, enc
sub $16, %r13
jmp _initial_blocks_encrypted
_initial_num_blocks_is_0_encrypt:
INITIAL_BLOCKS 0, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, enc
_initial_blocks_encrypted:
# Main loop - Encrypt remaining blocks
cmp $0, %r13
je _zero_cipher_left_encrypt
sub $64, %r13
je _four_cipher_left_encrypt
_encrypt_by_4_encrypt:
GHASH_4_ENCRYPT_4_PARALLEL %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, \
%xmm14, %xmm0, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, enc
add $64, %r11
sub $64, %r13
jne _encrypt_by_4_encrypt
_four_cipher_left_encrypt:
GHASH_LAST_4 %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, \
%xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm8
_zero_cipher_left_encrypt:
mov %arg4, %r13
and $15, %r13 # %r13 = arg4 (mod 16)
je _multiple_of_16_bytes_encrypt
# Handle the last <16 Byte block seperately
paddd ONE(%rip), %xmm0 # INCR CNT to get Yn
pshufb SHUF_MASK(%rip), %xmm0
ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # Encrypt(K, Yn)
sub $16, %r11
add %r13, %r11
movdqu (%arg3,%r11,1), %xmm1 # receive the last <16 byte blocks
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)
movdqu (%r12), %xmm2 # get the appropriate shuffle mask
pshufb %xmm2, %xmm1 # shift right 16-r13 byte
pxor %xmm1, %xmm0 # Plaintext XOR Encrypt(K, Yn)
movdqu ALL_F-SHIFT_MASK(%r12), %xmm1
# get the appropriate mask to mask out top 16-r13 bytes of xmm0
pand %xmm1, %xmm0 # mask out top 16-r13 bytes of xmm0
pshufb SHUF_MASK(%rip),%xmm0
pxor %xmm0, %xmm8
GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
# GHASH computation for the last <16 byte block
sub %r13, %r11
add $16, %r11
pshufb SHUF_MASK(%rip), %xmm0
# shuffle xmm0 back to output as ciphertext
# Output %r13 bytes
movq %xmm0, %rax
cmp $8, %r13
jle _less_than_8_bytes_left_encrypt
mov %rax, (%arg2 , %r11, 1)
add $8, %r11
psrldq $8, %xmm0
movq %xmm0, %rax
sub $8, %r13
_less_than_8_bytes_left_encrypt:
mov %al, (%arg2, %r11, 1)
add $1, %r11
shr $8, %rax
sub $1, %r13
jne _less_than_8_bytes_left_encrypt
_multiple_of_16_bytes_encrypt:
mov arg8, %r12 # %r12 = addLen (number of bytes)
shl $3, %r12
movd %r12d, %xmm15 # len(A) in %xmm15
shl $3, %arg4 # len(C) in bits (*128)
movq %arg4, %xmm1
pslldq $8, %xmm15 # %xmm15 = len(A)||0x0000000000000000
pxor %xmm1, %xmm15 # %xmm15 = len(A)||len(C)
pxor %xmm15, %xmm8
GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
# final GHASH computation
pshufb SHUF_MASK(%rip), %xmm8 # perform a 16 byte swap
mov %arg5, %rax # %rax = *Y0
movdqu (%rax), %xmm0 # %xmm0 = Y0
ENCRYPT_SINGLE_BLOCK %xmm0, %xmm15 # Encrypt(K, Y0)
pxor %xmm8, %xmm0
_return_T_encrypt:
mov arg9, %r10 # %r10 = authTag
mov arg10, %r11 # %r11 = auth_tag_len
cmp $16, %r11
je _T_16_encrypt
cmp $12, %r11
je _T_12_encrypt
_T_8_encrypt:
movq %xmm0, %rax
mov %rax, (%r10)
jmp _return_T_done_encrypt
_T_12_encrypt:
movq %xmm0, %rax
mov %rax, (%r10)
psrldq $8, %xmm0
movd %xmm0, %eax
mov %eax, 8(%r10)
jmp _return_T_done_encrypt
_T_16_encrypt:
movdqu %xmm0, (%r10)
_return_T_done_encrypt:
mov %r14, %rsp
pop %r14
pop %r13
pop %r12
ret
_key_expansion_128:
_key_expansion_256a:
pshufd $0b11111111, %xmm1, %xmm1
shufps $0b00010000, %xmm0, %xmm4
pxor %xmm4, %xmm0
shufps $0b10001100, %xmm0, %xmm4
pxor %xmm4, %xmm0
pxor %xmm1, %xmm0
movaps %xmm0, (%rcx)
add $0x10, %rcx
ret
_key_expansion_192a:
pshufd $0b01010101, %xmm1, %xmm1
shufps $0b00010000, %xmm0, %xmm4
pxor %xmm4, %xmm0
shufps $0b10001100, %xmm0, %xmm4
pxor %xmm4, %xmm0
pxor %xmm1, %xmm0
movaps %xmm2, %xmm5
movaps %xmm2, %xmm6
pslldq $4, %xmm5
pshufd $0b11111111, %xmm0, %xmm3
pxor %xmm3, %xmm2
pxor %xmm5, %xmm2
movaps %xmm0, %xmm1
shufps $0b01000100, %xmm0, %xmm6
movaps %xmm6, (%rcx)
shufps $0b01001110, %xmm2, %xmm1
movaps %xmm1, 16(%rcx)
add $0x20, %rcx
ret
_key_expansion_192b:
pshufd $0b01010101, %xmm1, %xmm1
shufps $0b00010000, %xmm0, %xmm4
pxor %xmm4, %xmm0
shufps $0b10001100, %xmm0, %xmm4
pxor %xmm4, %xmm0
pxor %xmm1, %xmm0
movaps %xmm2, %xmm5
pslldq $4, %xmm5
pshufd $0b11111111, %xmm0, %xmm3
pxor %xmm3, %xmm2
pxor %xmm5, %xmm2
movaps %xmm0, (%rcx)
add $0x10, %rcx
ret
_key_expansion_256b:
pshufd $0b10101010, %xmm1, %xmm1
shufps $0b00010000, %xmm2, %xmm4
pxor %xmm4, %xmm2
shufps $0b10001100, %xmm2, %xmm4
pxor %xmm4, %xmm2
pxor %xmm1, %xmm2
movaps %xmm2, (%rcx)
add $0x10, %rcx
ret
/*
* int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
* unsigned int key_len)
*/
ENTRY(aesni_set_key)
movups (%rsi), %xmm0 # user key (first 16 bytes)
movaps %xmm0, (%rdi)
lea 0x10(%rdi), %rcx # key addr
movl %edx, 480(%rdi)
pxor %xmm4, %xmm4 # xmm4 is assumed 0 in _key_expansion_x
cmp $24, %dl
jb .Lenc_key128
je .Lenc_key192
movups 0x10(%rsi), %xmm2 # other user key
movaps %xmm2, (%rcx)
add $0x10, %rcx
AESKEYGENASSIST 0x1 %xmm2 %xmm1 # round 1
call _key_expansion_256a
AESKEYGENASSIST 0x1 %xmm0 %xmm1
call _key_expansion_256b
AESKEYGENASSIST 0x2 %xmm2 %xmm1 # round 2
call _key_expansion_256a
AESKEYGENASSIST 0x2 %xmm0 %xmm1
call _key_expansion_256b
AESKEYGENASSIST 0x4 %xmm2 %xmm1 # round 3
call _key_expansion_256a
AESKEYGENASSIST 0x4 %xmm0 %xmm1
call _key_expansion_256b
AESKEYGENASSIST 0x8 %xmm2 %xmm1 # round 4
call _key_expansion_256a
AESKEYGENASSIST 0x8 %xmm0 %xmm1
call _key_expansion_256b
AESKEYGENASSIST 0x10 %xmm2 %xmm1 # round 5
call _key_expansion_256a
AESKEYGENASSIST 0x10 %xmm0 %xmm1
call _key_expansion_256b
AESKEYGENASSIST 0x20 %xmm2 %xmm1 # round 6
call _key_expansion_256a
AESKEYGENASSIST 0x20 %xmm0 %xmm1
call _key_expansion_256b
AESKEYGENASSIST 0x40 %xmm2 %xmm1 # round 7
call _key_expansion_256a
jmp .Ldec_key
.Lenc_key192:
movq 0x10(%rsi), %xmm2 # other user key
AESKEYGENASSIST 0x1 %xmm2 %xmm1 # round 1
call _key_expansion_192a
AESKEYGENASSIST 0x2 %xmm2 %xmm1 # round 2
call _key_expansion_192b
AESKEYGENASSIST 0x4 %xmm2 %xmm1 # round 3
call _key_expansion_192a
AESKEYGENASSIST 0x8 %xmm2 %xmm1 # round 4
call _key_expansion_192b
AESKEYGENASSIST 0x10 %xmm2 %xmm1 # round 5
call _key_expansion_192a
AESKEYGENASSIST 0x20 %xmm2 %xmm1 # round 6
call _key_expansion_192b
AESKEYGENASSIST 0x40 %xmm2 %xmm1 # round 7
call _key_expansion_192a
AESKEYGENASSIST 0x80 %xmm2 %xmm1 # round 8
call _key_expansion_192b
jmp .Ldec_key
.Lenc_key128:
AESKEYGENASSIST 0x1 %xmm0 %xmm1 # round 1
call _key_expansion_128
AESKEYGENASSIST 0x2 %xmm0 %xmm1 # round 2
call _key_expansion_128
AESKEYGENASSIST 0x4 %xmm0 %xmm1 # round 3
call _key_expansion_128
AESKEYGENASSIST 0x8 %xmm0 %xmm1 # round 4
call _key_expansion_128
AESKEYGENASSIST 0x10 %xmm0 %xmm1 # round 5
call _key_expansion_128
AESKEYGENASSIST 0x20 %xmm0 %xmm1 # round 6
call _key_expansion_128
AESKEYGENASSIST 0x40 %xmm0 %xmm1 # round 7
call _key_expansion_128
AESKEYGENASSIST 0x80 %xmm0 %xmm1 # round 8
call _key_expansion_128
AESKEYGENASSIST 0x1b %xmm0 %xmm1 # round 9
call _key_expansion_128
AESKEYGENASSIST 0x36 %xmm0 %xmm1 # round 10
call _key_expansion_128
.Ldec_key:
sub $0x10, %rcx
movaps (%rdi), %xmm0
movaps (%rcx), %xmm1
movaps %xmm0, 240(%rcx)
movaps %xmm1, 240(%rdi)
add $0x10, %rdi
lea 240-16(%rcx), %rsi
.align 4
.Ldec_key_loop:
movaps (%rdi), %xmm0
AESIMC %xmm0 %xmm1
movaps %xmm1, (%rsi)
add $0x10, %rdi
sub $0x10, %rsi
cmp %rcx, %rdi
jb .Ldec_key_loop
xor %rax, %rax
ret
/*
* void aesni_enc(struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
*/
ENTRY(aesni_enc)
movl 480(KEYP), KLEN # key length
movups (INP), STATE # input
call _aesni_enc1
movups STATE, (OUTP) # output
ret
/*
* _aesni_enc1: internal ABI
* input:
* KEYP: key struct pointer
* KLEN: round count
* STATE: initial state (input)
* output:
* STATE: finial state (output)
* changed:
* KEY
* TKEYP (T1)
*/
_aesni_enc1:
movaps (KEYP), KEY # key
mov KEYP, TKEYP
pxor KEY, STATE # round 0
add $0x30, TKEYP
cmp $24, KLEN
jb .Lenc128
lea 0x20(TKEYP), TKEYP
je .Lenc192
add $0x20, TKEYP
movaps -0x60(TKEYP), KEY
AESENC KEY STATE
movaps -0x50(TKEYP), KEY
AESENC KEY STATE
.align 4
.Lenc192:
movaps -0x40(TKEYP), KEY
AESENC KEY STATE
movaps -0x30(TKEYP), KEY
AESENC KEY STATE
.align 4
.Lenc128:
movaps -0x20(TKEYP), KEY
AESENC KEY STATE
movaps -0x10(TKEYP), KEY
AESENC KEY STATE
movaps (TKEYP), KEY
AESENC KEY STATE
movaps 0x10(TKEYP), KEY
AESENC KEY STATE
movaps 0x20(TKEYP), KEY
AESENC KEY STATE
movaps 0x30(TKEYP), KEY
AESENC KEY STATE
movaps 0x40(TKEYP), KEY
AESENC KEY STATE
movaps 0x50(TKEYP), KEY
AESENC KEY STATE
movaps 0x60(TKEYP), KEY
AESENC KEY STATE
movaps 0x70(TKEYP), KEY
AESENCLAST KEY STATE
ret
/*
* _aesni_enc4: internal ABI
* input:
* KEYP: key struct pointer
* KLEN: round count
* STATE1: initial state (input)
* STATE2
* STATE3
* STATE4
* output:
* STATE1: finial state (output)
* STATE2
* STATE3
* STATE4
* changed:
* KEY
* TKEYP (T1)
*/
_aesni_enc4:
movaps (KEYP), KEY # key
mov KEYP, TKEYP
pxor KEY, STATE1 # round 0
pxor KEY, STATE2
pxor KEY, STATE3
pxor KEY, STATE4
add $0x30, TKEYP
cmp $24, KLEN
jb .L4enc128
lea 0x20(TKEYP), TKEYP
je .L4enc192
add $0x20, TKEYP
movaps -0x60(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps -0x50(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
#.align 4
.L4enc192:
movaps -0x40(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps -0x30(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
#.align 4
.L4enc128:
movaps -0x20(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps -0x10(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps (TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps 0x10(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps 0x20(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps 0x30(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps 0x40(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps 0x50(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps 0x60(TKEYP), KEY
AESENC KEY STATE1
AESENC KEY STATE2
AESENC KEY STATE3
AESENC KEY STATE4
movaps 0x70(TKEYP), KEY
AESENCLAST KEY STATE1 # last round
AESENCLAST KEY STATE2
AESENCLAST KEY STATE3
AESENCLAST KEY STATE4
ret
/*
* void aesni_dec (struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
*/
ENTRY(aesni_dec)
mov 480(KEYP), KLEN # key length
add $240, KEYP
movups (INP), STATE # input
call _aesni_dec1
movups STATE, (OUTP) #output
ret
/*
* _aesni_dec1: internal ABI
* input:
* KEYP: key struct pointer
* KLEN: key length
* STATE: initial state (input)
* output:
* STATE: finial state (output)
* changed:
* KEY
* TKEYP (T1)
*/
_aesni_dec1:
movaps (KEYP), KEY # key
mov KEYP, TKEYP
pxor KEY, STATE # round 0
add $0x30, TKEYP
cmp $24, KLEN
jb .Ldec128
lea 0x20(TKEYP), TKEYP
je .Ldec192
add $0x20, TKEYP
movaps -0x60(TKEYP), KEY
AESDEC KEY STATE
movaps -0x50(TKEYP), KEY
AESDEC KEY STATE
.align 4
.Ldec192:
movaps -0x40(TKEYP), KEY
AESDEC KEY STATE
movaps -0x30(TKEYP), KEY
AESDEC KEY STATE
.align 4
.Ldec128:
movaps -0x20(TKEYP), KEY
AESDEC KEY STATE
movaps -0x10(TKEYP), KEY
AESDEC KEY STATE
movaps (TKEYP), KEY
AESDEC KEY STATE
movaps 0x10(TKEYP), KEY
AESDEC KEY STATE
movaps 0x20(TKEYP), KEY
AESDEC KEY STATE
movaps 0x30(TKEYP), KEY
AESDEC KEY STATE
movaps 0x40(TKEYP), KEY
AESDEC KEY STATE
movaps 0x50(TKEYP), KEY
AESDEC KEY STATE
movaps 0x60(TKEYP), KEY
AESDEC KEY STATE
movaps 0x70(TKEYP), KEY
AESDECLAST KEY STATE
ret
/*
* _aesni_dec4: internal ABI
* input:
* KEYP: key struct pointer
* KLEN: key length
* STATE1: initial state (input)
* STATE2
* STATE3
* STATE4
* output:
* STATE1: finial state (output)
* STATE2
* STATE3
* STATE4
* changed:
* KEY
* TKEYP (T1)
*/
_aesni_dec4:
movaps (KEYP), KEY # key
mov KEYP, TKEYP
pxor KEY, STATE1 # round 0
pxor KEY, STATE2
pxor KEY, STATE3
pxor KEY, STATE4
add $0x30, TKEYP
cmp $24, KLEN
jb .L4dec128
lea 0x20(TKEYP), TKEYP
je .L4dec192
add $0x20, TKEYP
movaps -0x60(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps -0x50(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
.align 4
.L4dec192:
movaps -0x40(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps -0x30(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
.align 4
.L4dec128:
movaps -0x20(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps -0x10(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps (TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps 0x10(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps 0x20(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps 0x30(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps 0x40(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps 0x50(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps 0x60(TKEYP), KEY
AESDEC KEY STATE1
AESDEC KEY STATE2
AESDEC KEY STATE3
AESDEC KEY STATE4
movaps 0x70(TKEYP), KEY
AESDECLAST KEY STATE1 # last round
AESDECLAST KEY STATE2
AESDECLAST KEY STATE3
AESDECLAST KEY STATE4
ret
/*
* void aesni_ecb_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
* size_t len)
*/
ENTRY(aesni_ecb_enc)
test LEN, LEN # check length
jz .Lecb_enc_ret
mov 480(KEYP), KLEN
cmp $16, LEN
jb .Lecb_enc_ret
cmp $64, LEN
jb .Lecb_enc_loop1
.align 4
.Lecb_enc_loop4:
movups (INP), STATE1
movups 0x10(INP), STATE2
movups 0x20(INP), STATE3
movups 0x30(INP), STATE4
call _aesni_enc4
movups STATE1, (OUTP)
movups STATE2, 0x10(OUTP)
movups STATE3, 0x20(OUTP)
movups STATE4, 0x30(OUTP)
sub $64, LEN
add $64, INP
add $64, OUTP
cmp $64, LEN
jge .Lecb_enc_loop4
cmp $16, LEN
jb .Lecb_enc_ret
.align 4
.Lecb_enc_loop1:
movups (INP), STATE1
call _aesni_enc1
movups STATE1, (OUTP)
sub $16, LEN
add $16, INP
add $16, OUTP
cmp $16, LEN
jge .Lecb_enc_loop1
.Lecb_enc_ret:
ret
/*
* void aesni_ecb_dec(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
* size_t len);
*/
ENTRY(aesni_ecb_dec)
test LEN, LEN
jz .Lecb_dec_ret
mov 480(KEYP), KLEN
add $240, KEYP
cmp $16, LEN
jb .Lecb_dec_ret
cmp $64, LEN
jb .Lecb_dec_loop1
.align 4
.Lecb_dec_loop4:
movups (INP), STATE1
movups 0x10(INP), STATE2
movups 0x20(INP), STATE3
movups 0x30(INP), STATE4
call _aesni_dec4
movups STATE1, (OUTP)
movups STATE2, 0x10(OUTP)
movups STATE3, 0x20(OUTP)
movups STATE4, 0x30(OUTP)
sub $64, LEN
add $64, INP
add $64, OUTP
cmp $64, LEN
jge .Lecb_dec_loop4
cmp $16, LEN
jb .Lecb_dec_ret
.align 4
.Lecb_dec_loop1:
movups (INP), STATE1
call _aesni_dec1
movups STATE1, (OUTP)
sub $16, LEN
add $16, INP
add $16, OUTP
cmp $16, LEN
jge .Lecb_dec_loop1
.Lecb_dec_ret:
ret
/*
* void aesni_cbc_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
* size_t len, u8 *iv)
*/
ENTRY(aesni_cbc_enc)
cmp $16, LEN
jb .Lcbc_enc_ret
mov 480(KEYP), KLEN
movups (IVP), STATE # load iv as initial state
.align 4
.Lcbc_enc_loop:
movups (INP), IN # load input
pxor IN, STATE
call _aesni_enc1
movups STATE, (OUTP) # store output
sub $16, LEN
add $16, INP
add $16, OUTP
cmp $16, LEN
jge .Lcbc_enc_loop
movups STATE, (IVP)
.Lcbc_enc_ret:
ret
/*
* void aesni_cbc_dec(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
* size_t len, u8 *iv)
*/
ENTRY(aesni_cbc_dec)
cmp $16, LEN
jb .Lcbc_dec_just_ret
mov 480(KEYP), KLEN
add $240, KEYP
movups (IVP), IV
cmp $64, LEN
jb .Lcbc_dec_loop1
.align 4
.Lcbc_dec_loop4:
movups (INP), IN1
movaps IN1, STATE1
movups 0x10(INP), IN2
movaps IN2, STATE2
movups 0x20(INP), IN3
movaps IN3, STATE3
movups 0x30(INP), IN4
movaps IN4, STATE4
call _aesni_dec4
pxor IV, STATE1
pxor IN1, STATE2
pxor IN2, STATE3
pxor IN3, STATE4
movaps IN4, IV
movups STATE1, (OUTP)
movups STATE2, 0x10(OUTP)
movups STATE3, 0x20(OUTP)
movups STATE4, 0x30(OUTP)
sub $64, LEN
add $64, INP
add $64, OUTP
cmp $64, LEN
jge .Lcbc_dec_loop4
cmp $16, LEN
jb .Lcbc_dec_ret
.align 4
.Lcbc_dec_loop1:
movups (INP), IN
movaps IN, STATE
call _aesni_dec1
pxor IV, STATE
movups STATE, (OUTP)
movaps IN, IV
sub $16, LEN
add $16, INP
add $16, OUTP
cmp $16, LEN
jge .Lcbc_dec_loop1
.Lcbc_dec_ret:
movups IV, (IVP)
.Lcbc_dec_just_ret:
ret
.align 16
.Lbswap_mask:
.byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
/*
* _aesni_inc_init: internal ABI
* setup registers used by _aesni_inc
* input:
* IV
* output:
* CTR: == IV, in little endian
* TCTR_LOW: == lower qword of CTR
* INC: == 1, in little endian
* BSWAP_MASK == endian swapping mask
*/
_aesni_inc_init:
movaps .Lbswap_mask, BSWAP_MASK
movaps IV, CTR
PSHUFB_XMM BSWAP_MASK CTR
mov $1, TCTR_LOW
MOVQ_R64_XMM TCTR_LOW INC
MOVQ_R64_XMM CTR TCTR_LOW
ret
/*
* _aesni_inc: internal ABI
* Increase IV by 1, IV is in big endian
* input:
* IV
* CTR: == IV, in little endian
* TCTR_LOW: == lower qword of CTR
* INC: == 1, in little endian
* BSWAP_MASK == endian swapping mask
* output:
* IV: Increase by 1
* changed:
* CTR: == output IV, in little endian
* TCTR_LOW: == lower qword of CTR
*/
_aesni_inc:
paddq INC, CTR
add $1, TCTR_LOW
jnc .Linc_low
pslldq $8, INC
paddq INC, CTR
psrldq $8, INC
.Linc_low:
movaps CTR, IV
PSHUFB_XMM BSWAP_MASK IV
ret
/*
* void aesni_ctr_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
* size_t len, u8 *iv)
*/
ENTRY(aesni_ctr_enc)
cmp $16, LEN
jb .Lctr_enc_just_ret
mov 480(KEYP), KLEN
movups (IVP), IV
call _aesni_inc_init
cmp $64, LEN
jb .Lctr_enc_loop1
.align 4
.Lctr_enc_loop4:
movaps IV, STATE1
call _aesni_inc
movups (INP), IN1
movaps IV, STATE2
call _aesni_inc
movups 0x10(INP), IN2
movaps IV, STATE3
call _aesni_inc
movups 0x20(INP), IN3
movaps IV, STATE4
call _aesni_inc
movups 0x30(INP), IN4
call _aesni_enc4
pxor IN1, STATE1
movups STATE1, (OUTP)
pxor IN2, STATE2
movups STATE2, 0x10(OUTP)
pxor IN3, STATE3
movups STATE3, 0x20(OUTP)
pxor IN4, STATE4
movups STATE4, 0x30(OUTP)
sub $64, LEN
add $64, INP
add $64, OUTP
cmp $64, LEN
jge .Lctr_enc_loop4
cmp $16, LEN
jb .Lctr_enc_ret
.align 4
.Lctr_enc_loop1:
movaps IV, STATE
call _aesni_inc
movups (INP), IN
call _aesni_enc1
pxor IN, STATE
movups STATE, (OUTP)
sub $16, LEN
add $16, INP
add $16, OUTP
cmp $16, LEN
jge .Lctr_enc_loop1
.Lctr_enc_ret:
movups IV, (IVP)
.Lctr_enc_just_ret:
ret
