2017-01-11 19:41:53 +03:00
|
|
|
/*
|
|
|
|
* Scalar AES core transform
|
|
|
|
*
|
|
|
|
* Copyright (C) 2017 Linaro Ltd.
|
|
|
|
* Author: Ard Biesheuvel <ard.biesheuvel@linaro.org>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/linkage.h>
|
2017-07-24 13:28:19 +03:00
|
|
|
#include <asm/cache.h>
|
2017-01-11 19:41:53 +03:00
|
|
|
|
|
|
|
.text
|
|
|
|
.align 5
|
|
|
|
|
|
|
|
rk .req r0
|
|
|
|
rounds .req r1
|
|
|
|
in .req r2
|
|
|
|
out .req r3
|
2017-01-13 11:33:26 +03:00
|
|
|
ttab .req ip
|
2017-01-11 19:41:53 +03:00
|
|
|
|
|
|
|
t0 .req lr
|
|
|
|
t1 .req r2
|
|
|
|
t2 .req r3
|
|
|
|
|
|
|
|
.macro __select, out, in, idx
|
|
|
|
.if __LINUX_ARM_ARCH__ < 7
|
|
|
|
and \out, \in, #0xff << (8 * \idx)
|
|
|
|
.else
|
|
|
|
ubfx \out, \in, #(8 * \idx), #8
|
|
|
|
.endif
|
|
|
|
.endm
|
|
|
|
|
2017-07-24 13:28:19 +03:00
|
|
|
.macro __load, out, in, idx, sz, op
|
2017-01-11 19:41:53 +03:00
|
|
|
.if __LINUX_ARM_ARCH__ < 7 && \idx > 0
|
2017-07-24 13:28:19 +03:00
|
|
|
ldr\op \out, [ttab, \in, lsr #(8 * \idx) - \sz]
|
2017-01-11 19:41:53 +03:00
|
|
|
.else
|
2017-07-24 13:28:19 +03:00
|
|
|
ldr\op \out, [ttab, \in, lsl #\sz]
|
2017-01-11 19:41:53 +03:00
|
|
|
.endif
|
|
|
|
.endm
|
|
|
|
|
2017-07-24 13:28:19 +03:00
|
|
|
.macro __hround, out0, out1, in0, in1, in2, in3, t3, t4, enc, sz, op
|
2017-01-11 19:41:53 +03:00
|
|
|
__select \out0, \in0, 0
|
|
|
|
__select t0, \in1, 1
|
2017-07-24 13:28:19 +03:00
|
|
|
__load \out0, \out0, 0, \sz, \op
|
|
|
|
__load t0, t0, 1, \sz, \op
|
2017-01-11 19:41:53 +03:00
|
|
|
|
|
|
|
.if \enc
|
|
|
|
__select \out1, \in1, 0
|
|
|
|
__select t1, \in2, 1
|
|
|
|
.else
|
|
|
|
__select \out1, \in3, 0
|
|
|
|
__select t1, \in0, 1
|
|
|
|
.endif
|
2017-07-24 13:28:19 +03:00
|
|
|
__load \out1, \out1, 0, \sz, \op
|
2017-01-11 19:41:53 +03:00
|
|
|
__select t2, \in2, 2
|
2017-07-24 13:28:19 +03:00
|
|
|
__load t1, t1, 1, \sz, \op
|
|
|
|
__load t2, t2, 2, \sz, \op
|
2017-01-11 19:41:53 +03:00
|
|
|
|
|
|
|
eor \out0, \out0, t0, ror #24
|
|
|
|
|
|
|
|
__select t0, \in3, 3
|
|
|
|
.if \enc
|
|
|
|
__select \t3, \in3, 2
|
|
|
|
__select \t4, \in0, 3
|
|
|
|
.else
|
|
|
|
__select \t3, \in1, 2
|
|
|
|
__select \t4, \in2, 3
|
|
|
|
.endif
|
2017-07-24 13:28:19 +03:00
|
|
|
__load \t3, \t3, 2, \sz, \op
|
|
|
|
__load t0, t0, 3, \sz, \op
|
|
|
|
__load \t4, \t4, 3, \sz, \op
|
2017-01-11 19:41:53 +03:00
|
|
|
|
|
|
|
eor \out1, \out1, t1, ror #24
|
|
|
|
eor \out0, \out0, t2, ror #16
|
|
|
|
ldm rk!, {t1, t2}
|
|
|
|
eor \out1, \out1, \t3, ror #16
|
|
|
|
eor \out0, \out0, t0, ror #8
|
|
|
|
eor \out1, \out1, \t4, ror #8
|
|
|
|
eor \out0, \out0, t1
|
|
|
|
eor \out1, \out1, t2
|
|
|
|
.endm
|
|
|
|
|
2017-07-24 13:28:19 +03:00
|
|
|
.macro fround, out0, out1, out2, out3, in0, in1, in2, in3, sz=2, op
|
|
|
|
__hround \out0, \out1, \in0, \in1, \in2, \in3, \out2, \out3, 1, \sz, \op
|
|
|
|
__hround \out2, \out3, \in2, \in3, \in0, \in1, \in1, \in2, 1, \sz, \op
|
2017-01-11 19:41:53 +03:00
|
|
|
.endm
|
|
|
|
|
2017-07-24 13:28:19 +03:00
|
|
|
.macro iround, out0, out1, out2, out3, in0, in1, in2, in3, sz=2, op
|
|
|
|
__hround \out0, \out1, \in0, \in3, \in2, \in1, \out2, \out3, 0, \sz, \op
|
|
|
|
__hround \out2, \out3, \in2, \in1, \in0, \in3, \in1, \in0, 0, \sz, \op
|
2017-01-11 19:41:53 +03:00
|
|
|
.endm
|
|
|
|
|
|
|
|
.macro __rev, out, in
|
|
|
|
.if __LINUX_ARM_ARCH__ < 6
|
|
|
|
lsl t0, \in, #24
|
|
|
|
and t1, \in, #0xff00
|
|
|
|
and t2, \in, #0xff0000
|
|
|
|
orr \out, t0, \in, lsr #24
|
|
|
|
orr \out, \out, t1, lsl #8
|
|
|
|
orr \out, \out, t2, lsr #8
|
|
|
|
.else
|
|
|
|
rev \out, \in
|
|
|
|
.endif
|
|
|
|
.endm
|
|
|
|
|
|
|
|
.macro __adrl, out, sym, c
|
|
|
|
.if __LINUX_ARM_ARCH__ < 7
|
|
|
|
ldr\c \out, =\sym
|
|
|
|
.else
|
|
|
|
movw\c \out, #:lower16:\sym
|
|
|
|
movt\c \out, #:upper16:\sym
|
|
|
|
.endif
|
|
|
|
.endm
|
|
|
|
|
2017-07-24 13:28:19 +03:00
|
|
|
.macro do_crypt, round, ttab, ltab, bsz
|
2017-01-11 19:41:53 +03:00
|
|
|
push {r3-r11, lr}
|
|
|
|
|
|
|
|
ldr r4, [in]
|
|
|
|
ldr r5, [in, #4]
|
|
|
|
ldr r6, [in, #8]
|
|
|
|
ldr r7, [in, #12]
|
|
|
|
|
|
|
|
ldm rk!, {r8-r11}
|
|
|
|
|
|
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
|
|
__rev r4, r4
|
|
|
|
__rev r5, r5
|
|
|
|
__rev r6, r6
|
|
|
|
__rev r7, r7
|
|
|
|
#endif
|
|
|
|
|
|
|
|
eor r4, r4, r8
|
|
|
|
eor r5, r5, r9
|
|
|
|
eor r6, r6, r10
|
|
|
|
eor r7, r7, r11
|
|
|
|
|
2017-01-13 11:33:26 +03:00
|
|
|
__adrl ttab, \ttab
|
2017-01-11 19:41:53 +03:00
|
|
|
|
|
|
|
tst rounds, #2
|
|
|
|
bne 1f
|
|
|
|
|
|
|
|
0: \round r8, r9, r10, r11, r4, r5, r6, r7
|
|
|
|
\round r4, r5, r6, r7, r8, r9, r10, r11
|
|
|
|
|
|
|
|
1: subs rounds, rounds, #4
|
|
|
|
\round r8, r9, r10, r11, r4, r5, r6, r7
|
2017-07-24 13:28:19 +03:00
|
|
|
bls 2f
|
2017-01-11 19:41:53 +03:00
|
|
|
\round r4, r5, r6, r7, r8, r9, r10, r11
|
2017-07-24 13:28:19 +03:00
|
|
|
b 0b
|
|
|
|
|
|
|
|
2: __adrl ttab, \ltab
|
|
|
|
\round r4, r5, r6, r7, r8, r9, r10, r11, \bsz, b
|
2017-01-11 19:41:53 +03:00
|
|
|
|
|
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
|
|
__rev r4, r4
|
|
|
|
__rev r5, r5
|
|
|
|
__rev r6, r6
|
|
|
|
__rev r7, r7
|
|
|
|
#endif
|
|
|
|
|
|
|
|
ldr out, [sp]
|
|
|
|
|
|
|
|
str r4, [out]
|
|
|
|
str r5, [out, #4]
|
|
|
|
str r6, [out, #8]
|
|
|
|
str r7, [out, #12]
|
|
|
|
|
|
|
|
pop {r3-r11, pc}
|
|
|
|
|
|
|
|
.align 3
|
|
|
|
.ltorg
|
|
|
|
.endm
|
|
|
|
|
2018-02-12 16:52:37 +03:00
|
|
|
ENTRY(__aes_arm_encrypt)
|
|
|
|
do_crypt fround, crypto_ft_tab, crypto_ft_tab + 1, 2
|
|
|
|
ENDPROC(__aes_arm_encrypt)
|
|
|
|
|
|
|
|
.align 5
|
|
|
|
ENTRY(__aes_arm_decrypt)
|
|
|
|
do_crypt iround, crypto_it_tab, __aes_arm_inverse_sbox, 0
|
|
|
|
ENDPROC(__aes_arm_decrypt)
|
|
|
|
|
|
|
|
.section ".rodata", "a"
|
2017-07-24 13:28:19 +03:00
|
|
|
.align L1_CACHE_SHIFT
|
|
|
|
.type __aes_arm_inverse_sbox, %object
|
|
|
|
__aes_arm_inverse_sbox:
|
|
|
|
.byte 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38
|
|
|
|
.byte 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb
|
|
|
|
.byte 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87
|
|
|
|
.byte 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb
|
|
|
|
.byte 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d
|
|
|
|
.byte 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e
|
|
|
|
.byte 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2
|
|
|
|
.byte 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25
|
|
|
|
.byte 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16
|
|
|
|
.byte 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92
|
|
|
|
.byte 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda
|
|
|
|
.byte 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84
|
|
|
|
.byte 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a
|
|
|
|
.byte 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06
|
|
|
|
.byte 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02
|
|
|
|
.byte 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b
|
|
|
|
.byte 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea
|
|
|
|
.byte 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73
|
|
|
|
.byte 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85
|
|
|
|
.byte 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e
|
|
|
|
.byte 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89
|
|
|
|
.byte 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b
|
|
|
|
.byte 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20
|
|
|
|
.byte 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4
|
|
|
|
.byte 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31
|
|
|
|
.byte 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f
|
|
|
|
.byte 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d
|
|
|
|
.byte 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef
|
|
|
|
.byte 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0
|
|
|
|
.byte 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61
|
|
|
|
.byte 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26
|
|
|
|
.byte 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
|
|
|
|
.size __aes_arm_inverse_sbox, . - __aes_arm_inverse_sbox
|