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60af520cf2
This patch fixes problem with packets that are not multiple of 64bytes. Signed-off-by: Adrian Hoban <adrian.hoban@intel.com> Signed-off-by: Aidan O'Mahony <aidan.o.mahony@intel.com> Signed-off-by: Gabriele Paoloni <gabriele.paoloni@intel.com> Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2617 lines
74 KiB
ArmAsm
2617 lines
74 KiB
ArmAsm
/*
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* Implement AES algorithm in Intel AES-NI instructions.
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*
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* The white paper of AES-NI instructions can be downloaded from:
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* http://softwarecommunity.intel.com/isn/downloads/intelavx/AES-Instructions-Set_WP.pdf
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*
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* Copyright (C) 2008, Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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* Vinodh Gopal <vinodh.gopal@intel.com>
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* Kahraman Akdemir
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*
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* Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
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* interface for 64-bit kernels.
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* Authors: Erdinc Ozturk (erdinc.ozturk@intel.com)
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* Aidan O'Mahony (aidan.o.mahony@intel.com)
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* Adrian Hoban <adrian.hoban@intel.com>
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* James Guilford (james.guilford@intel.com)
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* Gabriele Paoloni <gabriele.paoloni@intel.com>
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* Tadeusz Struk (tadeusz.struk@intel.com)
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* Wajdi Feghali (wajdi.k.feghali@intel.com)
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* Copyright (c) 2010, Intel Corporation.
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*
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* Ported x86_64 version to x86:
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* Author: Mathias Krause <minipli@googlemail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/linkage.h>
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#include <asm/inst.h>
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#ifdef __x86_64__
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.data
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POLY: .octa 0xC2000000000000000000000000000001
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TWOONE: .octa 0x00000001000000000000000000000001
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# order of these constants should not change.
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# more specifically, ALL_F should follow SHIFT_MASK,
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# and ZERO should follow ALL_F
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SHUF_MASK: .octa 0x000102030405060708090A0B0C0D0E0F
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MASK1: .octa 0x0000000000000000ffffffffffffffff
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MASK2: .octa 0xffffffffffffffff0000000000000000
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SHIFT_MASK: .octa 0x0f0e0d0c0b0a09080706050403020100
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ALL_F: .octa 0xffffffffffffffffffffffffffffffff
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ZERO: .octa 0x00000000000000000000000000000000
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ONE: .octa 0x00000000000000000000000000000001
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F_MIN_MASK: .octa 0xf1f2f3f4f5f6f7f8f9fafbfcfdfeff0
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dec: .octa 0x1
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enc: .octa 0x2
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.text
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#define STACK_OFFSET 8*3
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#define HashKey 16*0 // store HashKey <<1 mod poly here
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#define HashKey_2 16*1 // store HashKey^2 <<1 mod poly here
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#define HashKey_3 16*2 // store HashKey^3 <<1 mod poly here
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#define HashKey_4 16*3 // store HashKey^4 <<1 mod poly here
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#define HashKey_k 16*4 // store XOR of High 64 bits and Low 64
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// bits of HashKey <<1 mod poly here
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//(for Karatsuba purposes)
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#define HashKey_2_k 16*5 // store XOR of High 64 bits and Low 64
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// bits of HashKey^2 <<1 mod poly here
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// (for Karatsuba purposes)
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#define HashKey_3_k 16*6 // store XOR of High 64 bits and Low 64
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// bits of HashKey^3 <<1 mod poly here
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// (for Karatsuba purposes)
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#define HashKey_4_k 16*7 // store XOR of High 64 bits and Low 64
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// bits of HashKey^4 <<1 mod poly here
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// (for Karatsuba purposes)
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#define VARIABLE_OFFSET 16*8
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#define arg1 rdi
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#define arg2 rsi
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#define arg3 rdx
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#define arg4 rcx
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#define arg5 r8
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#define arg6 r9
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#define arg7 STACK_OFFSET+8(%r14)
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#define arg8 STACK_OFFSET+16(%r14)
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#define arg9 STACK_OFFSET+24(%r14)
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#define arg10 STACK_OFFSET+32(%r14)
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#endif
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#define STATE1 %xmm0
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#define STATE2 %xmm4
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#define STATE3 %xmm5
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#define STATE4 %xmm6
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#define STATE STATE1
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#define IN1 %xmm1
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#define IN2 %xmm7
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#define IN3 %xmm8
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#define IN4 %xmm9
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#define IN IN1
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#define KEY %xmm2
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#define IV %xmm3
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#define BSWAP_MASK %xmm10
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#define CTR %xmm11
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#define INC %xmm12
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#ifdef __x86_64__
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#define AREG %rax
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#define KEYP %rdi
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#define OUTP %rsi
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#define UKEYP OUTP
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#define INP %rdx
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#define LEN %rcx
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#define IVP %r8
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#define KLEN %r9d
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#define T1 %r10
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#define TKEYP T1
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#define T2 %r11
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#define TCTR_LOW T2
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#else
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#define AREG %eax
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#define KEYP %edi
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#define OUTP AREG
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#define UKEYP OUTP
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#define INP %edx
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#define LEN %esi
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#define IVP %ebp
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#define KLEN %ebx
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#define T1 %ecx
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#define TKEYP T1
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#endif
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#ifdef __x86_64__
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/* GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0)
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*
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*
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* Input: A and B (128-bits each, bit-reflected)
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* Output: C = A*B*x mod poly, (i.e. >>1 )
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* To compute GH = GH*HashKey mod poly, give HK = HashKey<<1 mod poly as input
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* GH = GH * HK * x mod poly which is equivalent to GH*HashKey mod poly.
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*
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*/
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.macro GHASH_MUL GH HK TMP1 TMP2 TMP3 TMP4 TMP5
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movdqa \GH, \TMP1
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pshufd $78, \GH, \TMP2
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pshufd $78, \HK, \TMP3
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pxor \GH, \TMP2 # TMP2 = a1+a0
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pxor \HK, \TMP3 # TMP3 = b1+b0
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PCLMULQDQ 0x11, \HK, \TMP1 # TMP1 = a1*b1
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PCLMULQDQ 0x00, \HK, \GH # GH = a0*b0
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PCLMULQDQ 0x00, \TMP3, \TMP2 # TMP2 = (a0+a1)*(b1+b0)
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pxor \GH, \TMP2
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pxor \TMP1, \TMP2 # TMP2 = (a0*b0)+(a1*b0)
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movdqa \TMP2, \TMP3
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pslldq $8, \TMP3 # left shift TMP3 2 DWs
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psrldq $8, \TMP2 # right shift TMP2 2 DWs
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pxor \TMP3, \GH
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pxor \TMP2, \TMP1 # TMP2:GH holds the result of GH*HK
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# first phase of the reduction
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movdqa \GH, \TMP2
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movdqa \GH, \TMP3
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movdqa \GH, \TMP4 # copy GH into TMP2,TMP3 and TMP4
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# in in order to perform
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# independent shifts
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pslld $31, \TMP2 # packed right shift <<31
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pslld $30, \TMP3 # packed right shift <<30
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pslld $25, \TMP4 # packed right shift <<25
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pxor \TMP3, \TMP2 # xor the shifted versions
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pxor \TMP4, \TMP2
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movdqa \TMP2, \TMP5
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psrldq $4, \TMP5 # right shift TMP5 1 DW
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pslldq $12, \TMP2 # left shift TMP2 3 DWs
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pxor \TMP2, \GH
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# second phase of the reduction
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movdqa \GH,\TMP2 # copy GH into TMP2,TMP3 and TMP4
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# in in order to perform
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# independent shifts
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movdqa \GH,\TMP3
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movdqa \GH,\TMP4
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psrld $1,\TMP2 # packed left shift >>1
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psrld $2,\TMP3 # packed left shift >>2
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psrld $7,\TMP4 # packed left shift >>7
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pxor \TMP3,\TMP2 # xor the shifted versions
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pxor \TMP4,\TMP2
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pxor \TMP5, \TMP2
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pxor \TMP2, \GH
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pxor \TMP1, \GH # result is in TMP1
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.endm
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/*
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* if a = number of total plaintext bytes
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* b = floor(a/16)
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* num_initial_blocks = b mod 4
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* encrypt the initial num_initial_blocks blocks and apply ghash on
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* the ciphertext
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* %r10, %r11, %r12, %rax, %xmm5, %xmm6, %xmm7, %xmm8, %xmm9 registers
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* are clobbered
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* arg1, %arg2, %arg3, %r14 are used as a pointer only, not modified
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*/
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.macro INITIAL_BLOCKS_DEC num_initial_blocks TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
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XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
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mov arg7, %r10 # %r10 = AAD
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mov arg8, %r12 # %r12 = aadLen
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mov %r12, %r11
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pxor %xmm\i, %xmm\i
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_get_AAD_loop\num_initial_blocks\operation:
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movd (%r10), \TMP1
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pslldq $12, \TMP1
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psrldq $4, %xmm\i
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pxor \TMP1, %xmm\i
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add $4, %r10
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sub $4, %r12
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jne _get_AAD_loop\num_initial_blocks\operation
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cmp $16, %r11
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je _get_AAD_loop2_done\num_initial_blocks\operation
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mov $16, %r12
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_get_AAD_loop2\num_initial_blocks\operation:
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psrldq $4, %xmm\i
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sub $4, %r12
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cmp %r11, %r12
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jne _get_AAD_loop2\num_initial_blocks\operation
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_get_AAD_loop2_done\num_initial_blocks\operation:
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movdqa SHUF_MASK(%rip), %xmm14
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PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
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xor %r11, %r11 # initialise the data pointer offset as zero
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# start AES for num_initial_blocks blocks
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mov %arg5, %rax # %rax = *Y0
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movdqu (%rax), \XMM0 # XMM0 = Y0
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movdqa SHUF_MASK(%rip), %xmm14
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PSHUFB_XMM %xmm14, \XMM0
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.if (\i == 5) || (\i == 6) || (\i == 7)
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.irpc index, \i_seq
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paddd ONE(%rip), \XMM0 # INCR Y0
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movdqa \XMM0, %xmm\index
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movdqa SHUF_MASK(%rip), %xmm14
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PSHUFB_XMM %xmm14, %xmm\index # perform a 16 byte swap
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.endr
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.irpc index, \i_seq
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pxor 16*0(%arg1), %xmm\index
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.endr
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.irpc index, \i_seq
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movaps 0x10(%rdi), \TMP1
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AESENC \TMP1, %xmm\index # Round 1
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.endr
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.irpc index, \i_seq
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movaps 0x20(%arg1), \TMP1
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AESENC \TMP1, %xmm\index # Round 2
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.endr
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.irpc index, \i_seq
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movaps 0x30(%arg1), \TMP1
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AESENC \TMP1, %xmm\index # Round 2
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.endr
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.irpc index, \i_seq
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movaps 0x40(%arg1), \TMP1
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AESENC \TMP1, %xmm\index # Round 2
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.endr
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.irpc index, \i_seq
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movaps 0x50(%arg1), \TMP1
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AESENC \TMP1, %xmm\index # Round 2
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.endr
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.irpc index, \i_seq
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movaps 0x60(%arg1), \TMP1
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AESENC \TMP1, %xmm\index # Round 2
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.endr
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.irpc index, \i_seq
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movaps 0x70(%arg1), \TMP1
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AESENC \TMP1, %xmm\index # Round 2
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.endr
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.irpc index, \i_seq
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movaps 0x80(%arg1), \TMP1
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AESENC \TMP1, %xmm\index # Round 2
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.endr
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.irpc index, \i_seq
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movaps 0x90(%arg1), \TMP1
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AESENC \TMP1, %xmm\index # Round 2
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.endr
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.irpc index, \i_seq
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movaps 0xa0(%arg1), \TMP1
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AESENCLAST \TMP1, %xmm\index # Round 10
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.endr
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.irpc index, \i_seq
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movdqu (%arg3 , %r11, 1), \TMP1
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pxor \TMP1, %xmm\index
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movdqu %xmm\index, (%arg2 , %r11, 1)
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# write back plaintext/ciphertext for num_initial_blocks
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add $16, %r11
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movdqa \TMP1, %xmm\index
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movdqa SHUF_MASK(%rip), %xmm14
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PSHUFB_XMM %xmm14, %xmm\index
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# prepare plaintext/ciphertext for GHASH computation
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.endr
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.endif
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GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
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# apply GHASH on num_initial_blocks blocks
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.if \i == 5
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pxor %xmm5, %xmm6
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GHASH_MUL %xmm6, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
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pxor %xmm6, %xmm7
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GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
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pxor %xmm7, %xmm8
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GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
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.elseif \i == 6
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pxor %xmm6, %xmm7
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GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
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pxor %xmm7, %xmm8
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GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
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.elseif \i == 7
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pxor %xmm7, %xmm8
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GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
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.endif
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cmp $64, %r13
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jl _initial_blocks_done\num_initial_blocks\operation
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# no need for precomputed values
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/*
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*
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* Precomputations for HashKey parallel with encryption of first 4 blocks.
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* Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
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*/
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paddd ONE(%rip), \XMM0 # INCR Y0
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movdqa \XMM0, \XMM1
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movdqa SHUF_MASK(%rip), %xmm14
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PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
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paddd ONE(%rip), \XMM0 # INCR Y0
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movdqa \XMM0, \XMM2
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movdqa SHUF_MASK(%rip), %xmm14
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PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
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paddd ONE(%rip), \XMM0 # INCR Y0
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movdqa \XMM0, \XMM3
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movdqa SHUF_MASK(%rip), %xmm14
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PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
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paddd ONE(%rip), \XMM0 # INCR Y0
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movdqa \XMM0, \XMM4
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movdqa SHUF_MASK(%rip), %xmm14
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PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
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pxor 16*0(%arg1), \XMM1
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pxor 16*0(%arg1), \XMM2
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pxor 16*0(%arg1), \XMM3
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pxor 16*0(%arg1), \XMM4
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movdqa \TMP3, \TMP5
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pshufd $78, \TMP3, \TMP1
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pxor \TMP3, \TMP1
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movdqa \TMP1, HashKey_k(%rsp)
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GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
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# TMP5 = HashKey^2<<1 (mod poly)
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movdqa \TMP5, HashKey_2(%rsp)
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# HashKey_2 = HashKey^2<<1 (mod poly)
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pshufd $78, \TMP5, \TMP1
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pxor \TMP5, \TMP1
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movdqa \TMP1, HashKey_2_k(%rsp)
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.irpc index, 1234 # do 4 rounds
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movaps 0x10*\index(%arg1), \TMP1
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AESENC \TMP1, \XMM1
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AESENC \TMP1, \XMM2
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AESENC \TMP1, \XMM3
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AESENC \TMP1, \XMM4
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.endr
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GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
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# TMP5 = HashKey^3<<1 (mod poly)
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movdqa \TMP5, HashKey_3(%rsp)
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pshufd $78, \TMP5, \TMP1
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pxor \TMP5, \TMP1
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movdqa \TMP1, HashKey_3_k(%rsp)
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.irpc index, 56789 # do next 5 rounds
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movaps 0x10*\index(%arg1), \TMP1
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AESENC \TMP1, \XMM1
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AESENC \TMP1, \XMM2
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AESENC \TMP1, \XMM3
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AESENC \TMP1, \XMM4
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.endr
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GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
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# TMP5 = HashKey^3<<1 (mod poly)
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movdqa \TMP5, HashKey_4(%rsp)
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pshufd $78, \TMP5, \TMP1
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pxor \TMP5, \TMP1
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movdqa \TMP1, HashKey_4_k(%rsp)
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movaps 0xa0(%arg1), \TMP2
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AESENCLAST \TMP2, \XMM1
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AESENCLAST \TMP2, \XMM2
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AESENCLAST \TMP2, \XMM3
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AESENCLAST \TMP2, \XMM4
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movdqu 16*0(%arg3 , %r11 , 1), \TMP1
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pxor \TMP1, \XMM1
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movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
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movdqa \TMP1, \XMM1
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movdqu 16*1(%arg3 , %r11 , 1), \TMP1
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pxor \TMP1, \XMM2
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movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
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movdqa \TMP1, \XMM2
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movdqu 16*2(%arg3 , %r11 , 1), \TMP1
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pxor \TMP1, \XMM3
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movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
|
|
movdqa \TMP1, \XMM3
|
|
movdqu 16*3(%arg3 , %r11 , 1), \TMP1
|
|
pxor \TMP1, \XMM4
|
|
movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
|
|
movdqa \TMP1, \XMM4
|
|
add $64, %r11
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
|
|
pxor \XMMDst, \XMM1
|
|
# combine GHASHed value with the corresponding ciphertext
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
|
|
|
|
_initial_blocks_done\num_initial_blocks\operation:
|
|
|
|
.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_ENC 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:
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, %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
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM0
|
|
|
|
.if (\i == 5) || (\i == 6) || (\i == 7)
|
|
.irpc index, \i_seq
|
|
paddd ONE(%rip), \XMM0 # INCR Y0
|
|
movdqa \XMM0, %xmm\index
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, %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
|
|
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, %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
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
|
|
|
|
paddd ONE(%rip), \XMM0 # INCR Y0
|
|
movdqa \XMM0, \XMM2
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
|
|
|
|
paddd ONE(%rip), \XMM0 # INCR Y0
|
|
movdqa \XMM0, \XMM3
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
|
|
|
|
paddd ONE(%rip), \XMM0 # INCR Y0
|
|
movdqa \XMM0, \XMM4
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \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
|
|
movdqu 16*1(%arg3 , %r11 , 1), \TMP1
|
|
pxor \TMP1, \XMM2
|
|
movdqu 16*2(%arg3 , %r11 , 1), \TMP1
|
|
pxor \TMP1, \XMM3
|
|
movdqu 16*3(%arg3 , %r11 , 1), \TMP1
|
|
pxor \TMP1, \XMM4
|
|
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)
|
|
|
|
add $64, %r11
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
|
|
pxor \XMMDst, \XMM1
|
|
# combine GHASHed value with the corresponding ciphertext
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
|
|
movdqa SHUF_MASK(%rip), %xmm14
|
|
PSHUFB_XMM %xmm14, \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_ENC 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
|
|
|
|
movdqa SHUF_MASK(%rip), %xmm15
|
|
# 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_XMM %xmm15, \XMM1 # perform a 16 byte swap
|
|
PCLMULQDQ 0x00, \TMP5, \XMM5 # XMM5 = a0*b0
|
|
PSHUFB_XMM %xmm15, \XMM2 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \XMM3 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \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
|
|
movdqu 16(%arg3,%r11,1), \TMP3
|
|
pxor \TMP3, \XMM2 # Ciphertext/Plaintext XOR EK
|
|
movdqu 32(%arg3,%r11,1), \TMP3
|
|
pxor \TMP3, \XMM3 # Ciphertext/Plaintext XOR EK
|
|
movdqu 48(%arg3,%r11,1), \TMP3
|
|
pxor \TMP3, \XMM4 # Ciphertext/Plaintext XOR EK
|
|
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
|
|
PSHUFB_XMM %xmm15, \XMM1 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \XMM2 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \XMM3 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \XMM4 # perform a 16 byte swap
|
|
|
|
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
|
|
|
|
/*
|
|
* decrypt 4 blocks at a time
|
|
* ghash the 4 previously decrypted ciphertext blocks
|
|
* arg1, %arg2, %arg3 are used as pointers only, not modified
|
|
* %r11 is the data offset value
|
|
*/
|
|
.macro GHASH_4_ENCRYPT_4_PARALLEL_DEC 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
|
|
|
|
movdqa SHUF_MASK(%rip), %xmm15
|
|
# 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_XMM %xmm15, \XMM1 # perform a 16 byte swap
|
|
PCLMULQDQ 0x00, \TMP5, \XMM5 # XMM5 = a0*b0
|
|
PSHUFB_XMM %xmm15, \XMM2 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \XMM3 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \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
|
|
movdqu \XMM1, (%arg2,%r11,1) # Write to plaintext buffer
|
|
movdqa \TMP3, \XMM1
|
|
movdqu 16(%arg3,%r11,1), \TMP3
|
|
pxor \TMP3, \XMM2 # Ciphertext/Plaintext XOR EK
|
|
movdqu \XMM2, 16(%arg2,%r11,1) # Write to plaintext buffer
|
|
movdqa \TMP3, \XMM2
|
|
movdqu 32(%arg3,%r11,1), \TMP3
|
|
pxor \TMP3, \XMM3 # Ciphertext/Plaintext XOR EK
|
|
movdqu \XMM3, 32(%arg2,%r11,1) # Write to plaintext buffer
|
|
movdqa \TMP3, \XMM3
|
|
movdqu 48(%arg3,%r11,1), \TMP3
|
|
pxor \TMP3, \XMM4 # Ciphertext/Plaintext XOR EK
|
|
movdqu \XMM4, 48(%arg2,%r11,1) # Write to plaintext buffer
|
|
movdqa \TMP3, \XMM4
|
|
PSHUFB_XMM %xmm15, \XMM1 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \XMM2 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \XMM3 # perform a 16 byte swap
|
|
PSHUFB_XMM %xmm15, \XMM4 # perform a 16 byte swap
|
|
|
|
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.
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* u8 *out, // Plaintext output. Encrypt in-place is allowed.
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* 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)
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|
* // concatenated with 8 byte Initialisation Vector (from IPSec ESP Payload)
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|
* // concatenated with 0x00000001. 16-byte aligned pointer.
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|
* u8 *hash_subkey, // H, the Hash sub key input. Data starts on a 16-byte boundary.
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|
* const u8 *aad, // Additional Authentication Data (AAD)
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|
* u64 aad_len, // Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 bytes
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|
* u8 *auth_tag, // Authenticated Tag output. The driver will compare this to the
|
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* // given authentication tag and only return the plaintext if they match.
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* u64 auth_tag_len); // Authenticated Tag Length in bytes. Valid values are 16
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|
* // (most likely), 12 or 8.
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|
*
|
|
* 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
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|
*
|
|
* iv:
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|
* 0 1 2 3
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|
* 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
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|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Salt (From the SA) |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Initialization Vector |
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* | (This is the sequence number from IPSec header) |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | 0x1 |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
|
|
*
|
|
*
|
|
* 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};
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* padded AAD in xmm register = {A1 A0 0 0}
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*
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | SPI (A1) |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | 32-bit Sequence Number (A0) |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | 0x0 |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
|
|
* AAD Format with 32-bit Sequence Number
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*
|
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* if AAD is 12 bytes:
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* AAD[3] = {A0, A1, A2};
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* padded AAD in xmm register = {A2 A1 A0 0}
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*
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | SPI (A2) |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | 64-bit Extended Sequence Number {A1,A0} |
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* | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | 0x0 |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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|
*
|
|
* 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.
|
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* For other sizes, the code will fail.
|
|
*
|
|
* poly = x^128 + x^127 + x^126 + x^121 + 1
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|
*
|
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*****************************************************************************/
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ENTRY(aesni_gcm_dec)
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push %r12
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push %r13
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push %r14
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mov %rsp, %r14
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/*
|
|
* states of %xmm registers %xmm6:%xmm15 not saved
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|
* all %xmm registers are clobbered
|
|
*/
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|
sub $VARIABLE_OFFSET, %rsp
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and $~63, %rsp # align rsp to 64 bytes
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mov %arg6, %r12
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movdqu (%r12), %xmm13 # %xmm13 = HashKey
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movdqa SHUF_MASK(%rip), %xmm2
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PSHUFB_XMM %xmm2, %xmm13
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|
|
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# Precompute HashKey<<1 (mod poly) from the hash key (required for GHASH)
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|
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movdqa %xmm13, %xmm2
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psllq $1, %xmm13
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psrlq $63, %xmm2
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movdqa %xmm2, %xmm1
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pslldq $8, %xmm2
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psrldq $8, %xmm1
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por %xmm2, %xmm13
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|
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# Reduction
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|
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pshufd $0x24, %xmm1, %xmm2
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pcmpeqd TWOONE(%rip), %xmm2
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pand POLY(%rip), %xmm2
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pxor %xmm2, %xmm13 # %xmm13 holds the HashKey<<1 (mod poly)
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|
|
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# Decrypt first few blocks
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|
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movdqa %xmm13, HashKey(%rsp) # store HashKey<<1 (mod poly)
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mov %arg4, %r13 # save the number of bytes of plaintext/ciphertext
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and $-16, %r13 # %r13 = %r13 - (%r13 mod 16)
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mov %r13, %r12
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and $(3<<4), %r12
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jz _initial_num_blocks_is_0_decrypt
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cmp $(2<<4), %r12
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jb _initial_num_blocks_is_1_decrypt
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je _initial_num_blocks_is_2_decrypt
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_initial_num_blocks_is_3_decrypt:
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INITIAL_BLOCKS_DEC 3, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
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%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, dec
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sub $48, %r13
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jmp _initial_blocks_decrypted
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_initial_num_blocks_is_2_decrypt:
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|
INITIAL_BLOCKS_DEC 2, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
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%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, dec
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sub $32, %r13
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jmp _initial_blocks_decrypted
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|
_initial_num_blocks_is_1_decrypt:
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INITIAL_BLOCKS_DEC 1, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
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%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, dec
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sub $16, %r13
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jmp _initial_blocks_decrypted
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|
_initial_num_blocks_is_0_decrypt:
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|
INITIAL_BLOCKS_DEC 0, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
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%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, dec
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_initial_blocks_decrypted:
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cmp $0, %r13
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je _zero_cipher_left_decrypt
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|
sub $64, %r13
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|
je _four_cipher_left_decrypt
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|
_decrypt_by_4:
|
|
GHASH_4_ENCRYPT_4_PARALLEL_DEC %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, \
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%xmm14, %xmm0, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, dec
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add $64, %r11
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|
sub $64, %r13
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|
jne _decrypt_by_4
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|
_four_cipher_left_decrypt:
|
|
GHASH_LAST_4 %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, \
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|
%xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm8
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|
_zero_cipher_left_decrypt:
|
|
mov %arg4, %r13
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and $15, %r13 # %r13 = arg4 (mod 16)
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|
je _multiple_of_16_bytes_decrypt
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|
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|
# Handle the last <16 byte block separately
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|
|
|
paddd ONE(%rip), %xmm0 # increment CNT to get Yn
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|
movdqa SHUF_MASK(%rip), %xmm10
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|
PSHUFB_XMM %xmm10, %xmm0
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|
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|
ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # E(K, Yn)
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|
sub $16, %r11
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add %r13, %r11
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|
movdqu (%arg3,%r11,1), %xmm1 # receive the last <16 byte block
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|
lea SHIFT_MASK+16(%rip), %r12
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|
sub %r13, %r12
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# adjust the shuffle mask pointer to be able to shift 16-%r13 bytes
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|
# (%r13 is the number of bytes in plaintext mod 16)
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|
movdqu (%r12), %xmm2 # get the appropriate shuffle mask
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|
PSHUFB_XMM %xmm2, %xmm1 # right shift 16-%r13 butes
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|
|
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movdqa %xmm1, %xmm2
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pxor %xmm1, %xmm0 # Ciphertext XOR E(K, Yn)
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|
movdqu ALL_F-SHIFT_MASK(%r12), %xmm1
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|
# get the appropriate mask to mask out top 16-%r13 bytes of %xmm0
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|
pand %xmm1, %xmm0 # mask out top 16-%r13 bytes of %xmm0
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|
pand %xmm1, %xmm2
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|
movdqa SHUF_MASK(%rip), %xmm10
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PSHUFB_XMM %xmm10 ,%xmm2
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|
|
|
pxor %xmm2, %xmm8
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GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
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|
# GHASH computation for the last <16 byte block
|
|
sub %r13, %r11
|
|
add $16, %r11
|
|
|
|
# output %r13 bytes
|
|
MOVQ_R64_XMM %xmm0, %rax
|
|
cmp $8, %r13
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|
jle _less_than_8_bytes_left_decrypt
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|
mov %rax, (%arg2 , %r11, 1)
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|
add $8, %r11
|
|
psrldq $8, %xmm0
|
|
MOVQ_R64_XMM %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
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|
_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
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|
shl $3, %arg4 # len(C) in bits (*128)
|
|
MOVQ_R64_XMM %arg4, %xmm1
|
|
pslldq $8, %xmm15 # %xmm15 = len(A)||0x0000000000000000
|
|
pxor %xmm1, %xmm15 # %xmm15 = len(A)||len(C)
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|
pxor %xmm15, %xmm8
|
|
GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
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|
# final GHASH computation
|
|
movdqa SHUF_MASK(%rip), %xmm10
|
|
PSHUFB_XMM %xmm10, %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_R64_XMM %xmm0, %rax
|
|
mov %rax, (%r10)
|
|
jmp _return_T_done_decrypt
|
|
_T_12_decrypt:
|
|
MOVQ_R64_XMM %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
|
|
movdqa SHUF_MASK(%rip), %xmm2
|
|
PSHUFB_XMM %xmm2, %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_ENC 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_ENC 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_ENC 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_ENC 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_ENC %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 separately
|
|
paddd ONE(%rip), %xmm0 # INCR CNT to get Yn
|
|
movdqa SHUF_MASK(%rip), %xmm10
|
|
PSHUFB_XMM %xmm10, %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_XMM %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
|
|
movdqa SHUF_MASK(%rip), %xmm10
|
|
PSHUFB_XMM %xmm10,%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
|
|
|
|
movdqa SHUF_MASK(%rip), %xmm10
|
|
PSHUFB_XMM %xmm10, %xmm0
|
|
|
|
# shuffle xmm0 back to output as ciphertext
|
|
|
|
# Output %r13 bytes
|
|
MOVQ_R64_XMM %xmm0, %rax
|
|
cmp $8, %r13
|
|
jle _less_than_8_bytes_left_encrypt
|
|
mov %rax, (%arg2 , %r11, 1)
|
|
add $8, %r11
|
|
psrldq $8, %xmm0
|
|
MOVQ_R64_XMM %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_R64_XMM %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
|
|
movdqa SHUF_MASK(%rip), %xmm10
|
|
PSHUFB_XMM %xmm10, %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_R64_XMM %xmm0, %rax
|
|
mov %rax, (%r10)
|
|
jmp _return_T_done_encrypt
|
|
_T_12_encrypt:
|
|
MOVQ_R64_XMM %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
|
|
|
|
#endif
|
|
|
|
|
|
_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, (TKEYP)
|
|
add $0x10, TKEYP
|
|
ret
|
|
|
|
.align 4
|
|
_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, (TKEYP)
|
|
shufps $0b01001110, %xmm2, %xmm1
|
|
movaps %xmm1, 0x10(TKEYP)
|
|
add $0x20, TKEYP
|
|
ret
|
|
|
|
.align 4
|
|
_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, (TKEYP)
|
|
add $0x10, TKEYP
|
|
ret
|
|
|
|
.align 4
|
|
_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, (TKEYP)
|
|
add $0x10, TKEYP
|
|
ret
|
|
|
|
/*
|
|
* int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
|
|
* unsigned int key_len)
|
|
*/
|
|
ENTRY(aesni_set_key)
|
|
#ifndef __x86_64__
|
|
pushl KEYP
|
|
movl 8(%esp), KEYP # ctx
|
|
movl 12(%esp), UKEYP # in_key
|
|
movl 16(%esp), %edx # key_len
|
|
#endif
|
|
movups (UKEYP), %xmm0 # user key (first 16 bytes)
|
|
movaps %xmm0, (KEYP)
|
|
lea 0x10(KEYP), TKEYP # key addr
|
|
movl %edx, 480(KEYP)
|
|
pxor %xmm4, %xmm4 # xmm4 is assumed 0 in _key_expansion_x
|
|
cmp $24, %dl
|
|
jb .Lenc_key128
|
|
je .Lenc_key192
|
|
movups 0x10(UKEYP), %xmm2 # other user key
|
|
movaps %xmm2, (TKEYP)
|
|
add $0x10, TKEYP
|
|
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(UKEYP), %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, TKEYP
|
|
movaps (KEYP), %xmm0
|
|
movaps (TKEYP), %xmm1
|
|
movaps %xmm0, 240(TKEYP)
|
|
movaps %xmm1, 240(KEYP)
|
|
add $0x10, KEYP
|
|
lea 240-16(TKEYP), UKEYP
|
|
.align 4
|
|
.Ldec_key_loop:
|
|
movaps (KEYP), %xmm0
|
|
AESIMC %xmm0 %xmm1
|
|
movaps %xmm1, (UKEYP)
|
|
add $0x10, KEYP
|
|
sub $0x10, UKEYP
|
|
cmp TKEYP, KEYP
|
|
jb .Ldec_key_loop
|
|
xor AREG, AREG
|
|
#ifndef __x86_64__
|
|
popl KEYP
|
|
#endif
|
|
ret
|
|
|
|
/*
|
|
* void aesni_enc(struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
|
|
*/
|
|
ENTRY(aesni_enc)
|
|
#ifndef __x86_64__
|
|
pushl KEYP
|
|
pushl KLEN
|
|
movl 12(%esp), KEYP
|
|
movl 16(%esp), OUTP
|
|
movl 20(%esp), INP
|
|
#endif
|
|
movl 480(KEYP), KLEN # key length
|
|
movups (INP), STATE # input
|
|
call _aesni_enc1
|
|
movups STATE, (OUTP) # output
|
|
#ifndef __x86_64__
|
|
popl KLEN
|
|
popl KEYP
|
|
#endif
|
|
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)
|
|
*/
|
|
.align 4
|
|
_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)
|
|
*/
|
|
.align 4
|
|
_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)
|
|
#ifndef __x86_64__
|
|
pushl KEYP
|
|
pushl KLEN
|
|
movl 12(%esp), KEYP
|
|
movl 16(%esp), OUTP
|
|
movl 20(%esp), INP
|
|
#endif
|
|
mov 480(KEYP), KLEN # key length
|
|
add $240, KEYP
|
|
movups (INP), STATE # input
|
|
call _aesni_dec1
|
|
movups STATE, (OUTP) #output
|
|
#ifndef __x86_64__
|
|
popl KLEN
|
|
popl KEYP
|
|
#endif
|
|
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)
|
|
*/
|
|
.align 4
|
|
_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)
|
|
*/
|
|
.align 4
|
|
_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)
|
|
#ifndef __x86_64__
|
|
pushl LEN
|
|
pushl KEYP
|
|
pushl KLEN
|
|
movl 16(%esp), KEYP
|
|
movl 20(%esp), OUTP
|
|
movl 24(%esp), INP
|
|
movl 28(%esp), LEN
|
|
#endif
|
|
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:
|
|
#ifndef __x86_64__
|
|
popl KLEN
|
|
popl KEYP
|
|
popl LEN
|
|
#endif
|
|
ret
|
|
|
|
/*
|
|
* void aesni_ecb_dec(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
|
|
* size_t len);
|
|
*/
|
|
ENTRY(aesni_ecb_dec)
|
|
#ifndef __x86_64__
|
|
pushl LEN
|
|
pushl KEYP
|
|
pushl KLEN
|
|
movl 16(%esp), KEYP
|
|
movl 20(%esp), OUTP
|
|
movl 24(%esp), INP
|
|
movl 28(%esp), LEN
|
|
#endif
|
|
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:
|
|
#ifndef __x86_64__
|
|
popl KLEN
|
|
popl KEYP
|
|
popl LEN
|
|
#endif
|
|
ret
|
|
|
|
/*
|
|
* void aesni_cbc_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
|
|
* size_t len, u8 *iv)
|
|
*/
|
|
ENTRY(aesni_cbc_enc)
|
|
#ifndef __x86_64__
|
|
pushl IVP
|
|
pushl LEN
|
|
pushl KEYP
|
|
pushl KLEN
|
|
movl 20(%esp), KEYP
|
|
movl 24(%esp), OUTP
|
|
movl 28(%esp), INP
|
|
movl 32(%esp), LEN
|
|
movl 36(%esp), IVP
|
|
#endif
|
|
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:
|
|
#ifndef __x86_64__
|
|
popl KLEN
|
|
popl KEYP
|
|
popl LEN
|
|
popl IVP
|
|
#endif
|
|
ret
|
|
|
|
/*
|
|
* void aesni_cbc_dec(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
|
|
* size_t len, u8 *iv)
|
|
*/
|
|
ENTRY(aesni_cbc_dec)
|
|
#ifndef __x86_64__
|
|
pushl IVP
|
|
pushl LEN
|
|
pushl KEYP
|
|
pushl KLEN
|
|
movl 20(%esp), KEYP
|
|
movl 24(%esp), OUTP
|
|
movl 28(%esp), INP
|
|
movl 32(%esp), LEN
|
|
movl 36(%esp), IVP
|
|
#endif
|
|
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
|
|
#ifdef __x86_64__
|
|
movups 0x20(INP), IN3
|
|
movaps IN3, STATE3
|
|
movups 0x30(INP), IN4
|
|
movaps IN4, STATE4
|
|
#else
|
|
movups 0x20(INP), IN1
|
|
movaps IN1, STATE3
|
|
movups 0x30(INP), IN2
|
|
movaps IN2, STATE4
|
|
#endif
|
|
call _aesni_dec4
|
|
pxor IV, STATE1
|
|
#ifdef __x86_64__
|
|
pxor IN1, STATE2
|
|
pxor IN2, STATE3
|
|
pxor IN3, STATE4
|
|
movaps IN4, IV
|
|
#else
|
|
pxor (INP), STATE2
|
|
pxor 0x10(INP), STATE3
|
|
pxor IN1, STATE4
|
|
movaps IN2, IV
|
|
#endif
|
|
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:
|
|
#ifndef __x86_64__
|
|
popl KLEN
|
|
popl KEYP
|
|
popl LEN
|
|
popl IVP
|
|
#endif
|
|
ret
|
|
|
|
#ifdef __x86_64__
|
|
.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
|
|
*/
|
|
.align 4
|
|
_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
|
|
*/
|
|
.align 4
|
|
_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
|
|
#endif
|