+++ /dev/null
-/* aes_dec-asm.S */
-/*
- This file is part of the AVR-Crypto-Lib.
- Copyright (C) 2008, 2009 Daniel Otte (daniel.otte@rub.de)
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-/**
- * \file aes_dec-asm.S
- * \email daniel.otte@rub.de
- * \author Daniel Otte
- * \date 2009-01-10
- * \license GPLv3 or later
- *
- */
-
-#include "avr-asm-macros.S"
-A = 28
-B = 29
-P = 0
-xREDUCER = 25
-
-.global aes256_dec
-aes256_dec:
- ldi r20, 14
- rjmp aes_decrypt_core
-
-.global aes192_dec
-aes192_dec:
- ldi r20, 12
- rjmp aes_decrypt_core
-
-.global aes128_dec
-aes128_dec:
- ldi r20, 10
-
-
-/*
- void aes_decrypt_core(aes_cipher_state_t* state, const aes_genctx_t* ks, uint8_t rounds)
-*/
-T0= 2
-T1= 3
-T2= 4
-T3= 5
-T4 = 6
-T5 = 7
-ST00 = 8
-ST01 = 9
-ST02 = 10
-ST03 = 11
-ST10 = 12
-ST11 = 13
-ST12 = 14
-ST13 = 15
-ST20 = 16
-ST21 = 17
-ST22 = 18
-ST23 = 19
-ST30 = 20
-ST31 = 21
-ST32 = 22
-ST33 = 23
-CTR = 24
-/*
- * param state: r24:r25
- * param ks: r22:r23
- * param rounds: r20
- */
-.global aes_decrypt_core
-aes_decrypt_core:
- push_range 2, 17
- push r28
- push r29
- push r24
- push r25
- movw r26, r22
- movw r30, r24
- mov CTR, r20
- inc r20
- swap r20 /* r20*16 */
- add r26, r20
- adc r27, r1
- clt
- .irp param, ST00, ST01, ST02, ST03, ST10, ST11, ST12, ST13, ST20, ST21, ST22, ST23, ST30, ST31, ST32, ST33
- ld \param, Z+
- .endr
-
- ldi xREDUCER, 0x1b /* load reducer */
-
-
- .irp param, ST33, ST32, ST31, ST30, ST23, ST22, ST21, ST20, ST13, ST12, ST11, ST10, ST03, ST02, ST01, ST00
- ld r0, -X
- eor \param, r0
- .endr
-1:
- dec CTR
- brne 2f
- set
-2:
- ldi r31, hi8(aes_invsbox)
- /* substitute and invShift */
- .irp param, ST00, ST10, ST20, ST30
- mov r30, \param
- lpm \param, Z
- .endr
- mov r30, ST31
- lpm T0, Z
- mov r30, ST21
- lpm ST31, Z
- mov r30, ST11
- lpm ST21, Z
- mov r30, ST01
- lpm ST11, Z
- mov ST01, T0
-
- mov r30, ST32
- lpm T0, Z
- mov r30, ST22
- lpm T1,Z
- mov r30, ST12
- lpm ST32, Z
- mov r30, ST02
- lpm ST22, Z
- mov ST12, T0
- mov ST02, T1
-
- mov r30, ST03
- lpm T0, Z
- mov r30, ST13
- lpm ST03, Z
- mov r30, ST23
- lpm ST13, Z
- mov r30, ST33
- lpm ST23, Z
- mov ST33, T0
-
- /* key addition */
- .irp param, ST33, ST32, ST31, ST30, ST23, ST22, ST21, ST20, ST13, ST12, ST11, ST10, ST03, ST02, ST01, ST00
- ld r0, -X
- eor \param, r0
- .endr
- brtc 2f
-exit:
- pop r31
- pop r30
- st Z+, ST00
- st Z+, ST01
- st Z+, ST02
- st Z+, ST03
- st Z+, ST10
- st Z+, ST11
- st Z+, ST12
- st Z+, ST13
- st Z+, ST20
- st Z+, ST21
- st Z+, ST22
- st Z+, ST23
- st Z+, ST30
- st Z+, ST31
- st Z+, ST32
- st Z+, ST33
- pop r29
- pop r28
- pop_range 2, 17
- ret
-2:
- /* inv column (row) mixing*/
- /* invMixCol (Row) 1 */
- /* preparing */
- ldi r31, hi8(lut_gf256mul_0x09)
- mov T0, ST03
- eor T0, ST02 ; T0 = t
- mov T1, ST00
- eor T1, ST01 ; T1 = u
- mov r30, T0
- eor r30, T1
- lpm T2, Z ; T2 = v'
-
- ldi r31, hi8(lut_gf256mul_0x04)
- mov r30, ST02
- eor r30, ST00
- lpm T3, Z
- eor T3, T2; T3 = w
-
- mov r30, ST03
- eor r30, ST01
- lpm P, Z ; T2 = v
- eor T2, P
-
- /* now the big move */
- mov T4, ST00
- eor T4, ST03
- lsl T4
- brcc 3f
- eor T4, xREDUCER
-3: eor T4, T2
- eor ST03, T4
-
- mov T4, ST02
- eor T4, ST01
- lsl T4
- brcc 3f
- eor T4, xREDUCER
-3: eor T4, T2
- eor ST01, T4
-
- lsl T0
- brcc 3f
- eor T0, xREDUCER
-3: eor T0, T3
- eor ST02, T0
-
- lsl T1
- brcc 3f
- eor T1, xREDUCER
-3: eor T1, T3
- eor ST00, T1
-
- /* invMixCol (Row) 2 */
- /* preparing */
- ldi r31, hi8(lut_gf256mul_0x09)
- mov T0, ST13
- eor T0, ST12 ; T0 = t
- mov T1, ST10
- eor T1, ST11 ; T1 = u
- mov r30, T0
- eor r30, T1
-
- lpm T2, Z ; T2 = v'
-
- ldi r31, hi8(lut_gf256mul_0x04)
- mov r30, ST12
- eor r30, ST10
- lpm T3, Z
- eor T3, T2; T3 = w
-
- mov r30, ST13
- eor r30, ST11
- lpm P, Z
- eor T2, P ; T2 = v
-
- /* now the big move */
- mov T4, ST10
- eor T4, ST13
- lsl T4
- brcc 3f
- eor T4, xREDUCER
-3: eor T4, T2
- eor ST13, T4
-
- mov T4, ST12
- eor T4, ST11
- lsl T4
- brcc 3f
- eor T4, xREDUCER
-3: eor T4, T2
- eor ST11, T4
-
- lsl T0
- brcc 3f
- eor T0, xREDUCER
-3: eor T0, T3
- eor ST12, T0
-
- lsl T1
- brcc 3f
- eor T1, xREDUCER
-3: eor T1, T3
- eor ST10, T1
-
- /* invMixCol (Row) 2 */
- /* preparing */
- ldi r31, hi8(lut_gf256mul_0x09)
- mov T0, ST23
- eor T0, ST22 ; T0 = t
- mov T1, ST20
- eor T1, ST21 ; T1 = u
- mov r30, T0
- eor r30, T1
-
- lpm T2, Z ; T2 = v'
-
- ldi r31, hi8(lut_gf256mul_0x04)
- mov r30, ST22
- eor r30, ST20
- lpm T3, Z
- eor T3, T2; T3 = w
-
- mov r30, ST23
- eor r30, ST21
- lpm P, Z
- eor T2, P ; T2 = v
-
- /* now the big move */
- mov T4, ST20
- eor T4, ST23
- lsl T4
- brcc 3f
- eor T4, xREDUCER
-3: eor T4, T2
- eor ST23, T4
-
- mov T4, ST22
- eor T4, ST21
- lsl T4
- brcc 3f
- eor T4, xREDUCER
-3: eor T4, T2
- eor ST21, T4
-
- lsl T0
- brcc 3f
- eor T0, xREDUCER
-3: eor T0, T3
- eor ST22, T0
-
- lsl T1
- brcc 3f
- eor T1, xREDUCER
-3: eor T1, T3
- eor ST20, T1
-
- /* invMixCol (Row) 3 */
- /* preparing */
- ldi r31, hi8(lut_gf256mul_0x09)
- mov T0, ST33
- eor T0, ST32 ; T0 = t
- mov T1, ST30
- eor T1, ST31 ; T1 = u
- mov r30, T0
- eor r30, T1
-
- lpm T2, Z ; T2 = v'
-
- ldi r31, hi8(lut_gf256mul_0x04)
- mov r30, ST32
- eor r30, ST30
- lpm T3, Z
- eor T3, T2; T3 = w
-
- mov r30, ST33
- eor r30, ST31
- lpm P, Z
- eor T2, P ; T2 = v
-
- /* now the big move */
- mov T4, ST30
- eor T4, ST33
- lsl T4
- brcc 3f
- eor T4, xREDUCER
-3: eor T4, T2
- eor ST33, T4
-
- mov T4, ST32
- eor T4, ST31
- lsl T4
- brcc 3f
- eor T4, xREDUCER
-3: eor T4, T2
- eor ST31, T4
-
- lsl T0
- brcc 3f
- eor T0, xREDUCER
-3: eor T0, T3
- eor ST32, T0
-
- lsl T1
- brcc 3f
- eor T1, xREDUCER
-3: eor T1, T3
- eor ST30, T1
-
- rjmp 1b
-
-.balign 256
-
-lut_gf256mul_0x09:
-.byte 0x00, 0x09, 0x12, 0x1B, 0x24, 0x2D, 0x36, 0x3F
-.byte 0x48, 0x41, 0x5A, 0x53, 0x6C, 0x65, 0x7E, 0x77
-.byte 0x90, 0x99, 0x82, 0x8B, 0xB4, 0xBD, 0xA6, 0xAF
-.byte 0xD8, 0xD1, 0xCA, 0xC3, 0xFC, 0xF5, 0xEE, 0xE7
-.byte 0x3B, 0x32, 0x29, 0x20, 0x1F, 0x16, 0x0D, 0x04
-.byte 0x73, 0x7A, 0x61, 0x68, 0x57, 0x5E, 0x45, 0x4C
-.byte 0xAB, 0xA2, 0xB9, 0xB0, 0x8F, 0x86, 0x9D, 0x94
-.byte 0xE3, 0xEA, 0xF1, 0xF8, 0xC7, 0xCE, 0xD5, 0xDC
-.byte 0x76, 0x7F, 0x64, 0x6D, 0x52, 0x5B, 0x40, 0x49
-.byte 0x3E, 0x37, 0x2C, 0x25, 0x1A, 0x13, 0x08, 0x01
-.byte 0xE6, 0xEF, 0xF4, 0xFD, 0xC2, 0xCB, 0xD0, 0xD9
-.byte 0xAE, 0xA7, 0xBC, 0xB5, 0x8A, 0x83, 0x98, 0x91
-.byte 0x4D, 0x44, 0x5F, 0x56, 0x69, 0x60, 0x7B, 0x72
-.byte 0x05, 0x0C, 0x17, 0x1E, 0x21, 0x28, 0x33, 0x3A
-.byte 0xDD, 0xD4, 0xCF, 0xC6, 0xF9, 0xF0, 0xEB, 0xE2
-.byte 0x95, 0x9C, 0x87, 0x8E, 0xB1, 0xB8, 0xA3, 0xAA
-.byte 0xEC, 0xE5, 0xFE, 0xF7, 0xC8, 0xC1, 0xDA, 0xD3
-.byte 0xA4, 0xAD, 0xB6, 0xBF, 0x80, 0x89, 0x92, 0x9B
-.byte 0x7C, 0x75, 0x6E, 0x67, 0x58, 0x51, 0x4A, 0x43
-.byte 0x34, 0x3D, 0x26, 0x2F, 0x10, 0x19, 0x02, 0x0B
-.byte 0xD7, 0xDE, 0xC5, 0xCC, 0xF3, 0xFA, 0xE1, 0xE8
-.byte 0x9F, 0x96, 0x8D, 0x84, 0xBB, 0xB2, 0xA9, 0xA0
-.byte 0x47, 0x4E, 0x55, 0x5C, 0x63, 0x6A, 0x71, 0x78
-.byte 0x0F, 0x06, 0x1D, 0x14, 0x2B, 0x22, 0x39, 0x30
-.byte 0x9A, 0x93, 0x88, 0x81, 0xBE, 0xB7, 0xAC, 0xA5
-.byte 0xD2, 0xDB, 0xC0, 0xC9, 0xF6, 0xFF, 0xE4, 0xED
-.byte 0x0A, 0x03, 0x18, 0x11, 0x2E, 0x27, 0x3C, 0x35
-.byte 0x42, 0x4B, 0x50, 0x59, 0x66, 0x6F, 0x74, 0x7D
-.byte 0xA1, 0xA8, 0xB3, 0xBA, 0x85, 0x8C, 0x97, 0x9E
-.byte 0xE9, 0xE0, 0xFB, 0xF2, 0xCD, 0xC4, 0xDF, 0xD6
-.byte 0x31, 0x38, 0x23, 0x2A, 0x15, 0x1C, 0x07, 0x0E
-.byte 0x79, 0x70, 0x6B, 0x62, 0x5D, 0x54, 0x4F, 0x46
-
-lut_gf256mul_0x04:
-.byte 0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C
-.byte 0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C
-.byte 0x40, 0x44, 0x48, 0x4C, 0x50, 0x54, 0x58, 0x5C
-.byte 0x60, 0x64, 0x68, 0x6C, 0x70, 0x74, 0x78, 0x7C
-.byte 0x80, 0x84, 0x88, 0x8C, 0x90, 0x94, 0x98, 0x9C
-.byte 0xA0, 0xA4, 0xA8, 0xAC, 0xB0, 0xB4, 0xB8, 0xBC
-.byte 0xC0, 0xC4, 0xC8, 0xCC, 0xD0, 0xD4, 0xD8, 0xDC
-.byte 0xE0, 0xE4, 0xE8, 0xEC, 0xF0, 0xF4, 0xF8, 0xFC
-.byte 0x1B, 0x1F, 0x13, 0x17, 0x0B, 0x0F, 0x03, 0x07
-.byte 0x3B, 0x3F, 0x33, 0x37, 0x2B, 0x2F, 0x23, 0x27
-.byte 0x5B, 0x5F, 0x53, 0x57, 0x4B, 0x4F, 0x43, 0x47
-.byte 0x7B, 0x7F, 0x73, 0x77, 0x6B, 0x6F, 0x63, 0x67
-.byte 0x9B, 0x9F, 0x93, 0x97, 0x8B, 0x8F, 0x83, 0x87
-.byte 0xBB, 0xBF, 0xB3, 0xB7, 0xAB, 0xAF, 0xA3, 0xA7
-.byte 0xDB, 0xDF, 0xD3, 0xD7, 0xCB, 0xCF, 0xC3, 0xC7
-.byte 0xFB, 0xFF, 0xF3, 0xF7, 0xEB, 0xEF, 0xE3, 0xE7
-.byte 0x36, 0x32, 0x3E, 0x3A, 0x26, 0x22, 0x2E, 0x2A
-.byte 0x16, 0x12, 0x1E, 0x1A, 0x06, 0x02, 0x0E, 0x0A
-.byte 0x76, 0x72, 0x7E, 0x7A, 0x66, 0x62, 0x6E, 0x6A
-.byte 0x56, 0x52, 0x5E, 0x5A, 0x46, 0x42, 0x4E, 0x4A
-.byte 0xB6, 0xB2, 0xBE, 0xBA, 0xA6, 0xA2, 0xAE, 0xAA
-.byte 0x96, 0x92, 0x9E, 0x9A, 0x86, 0x82, 0x8E, 0x8A
-.byte 0xF6, 0xF2, 0xFE, 0xFA, 0xE6, 0xE2, 0xEE, 0xEA
-.byte 0xD6, 0xD2, 0xDE, 0xDA, 0xC6, 0xC2, 0xCE, 0xCA
-.byte 0x2D, 0x29, 0x25, 0x21, 0x3D, 0x39, 0x35, 0x31
-.byte 0x0D, 0x09, 0x05, 0x01, 0x1D, 0x19, 0x15, 0x11
-.byte 0x6D, 0x69, 0x65, 0x61, 0x7D, 0x79, 0x75, 0x71
-.byte 0x4D, 0x49, 0x45, 0x41, 0x5D, 0x59, 0x55, 0x51
-.byte 0xAD, 0xA9, 0xA5, 0xA1, 0xBD, 0xB9, 0xB5, 0xB1
-.byte 0x8D, 0x89, 0x85, 0x81, 0x9D, 0x99, 0x95, 0x91
-.byte 0xED, 0xE9, 0xE5, 0xE1, 0xFD, 0xF9, 0xF5, 0xF1
-.byte 0xCD, 0xC9, 0xC5, 0xC1, 0xDD, 0xD9, 0xD5, 0xD1
-
projects / avr-crypto-lib.git / blobdiff