65816-crypto/aes.asm

	case	on
	mcopy	aes.macros

	align	256
tables	privdata
Sbox	anop		; forward s-box
	dc h'63 7c 77 7b f2 6b 6f c5 30 01 67 2b fe d7 ab 76'
	dc h'ca 82 c9 7d fa 59 47 f0 ad d4 a2 af 9c a4 72 c0'
	dc h'b7 fd 93 26 36 3f f7 cc 34 a5 e5 f1 71 d8 31 15'
	dc h'04 c7 23 c3 18 96 05 9a 07 12 80 e2 eb 27 b2 75'
	dc h'09 83 2c 1a 1b 6e 5a a0 52 3b d6 b3 29 e3 2f 84'
	dc h'53 d1 00 ed 20 fc b1 5b 6a cb be 39 4a 4c 58 cf'
	dc h'd0 ef aa fb 43 4d 33 85 45 f9 02 7f 50 3c 9f a8'
	dc h'51 a3 40 8f 92 9d 38 f5 bc b6 da 21 10 ff f3 d2'
	dc h'cd 0c 13 ec 5f 97 44 17 c4 a7 7e 3d 64 5d 19 73'
	dc h'60 81 4f dc 22 2a 90 88 46 ee b8 14 de 5e 0b db'
	dc h'e0 32 3a 0a 49 06 24 5c c2 d3 ac 62 91 95 e4 79'
	dc h'e7 c8 37 6d 8d d5 4e a9 6c 56 f4 ea 65 7a ae 08'
	dc h'ba 78 25 2e 1c a6 b4 c6 e8 dd 74 1f 4b bd 8b 8a'
	dc h'70 3e b5 66 48 03 f6 0e 61 35 57 b9 86 c1 1d 9e'
	dc h'e1 f8 98 11 69 d9 8e 94 9b 1e 87 e9 ce 55 28 df'
	dc h'8c a1 89 0d bf e6 42 68 41 99 2d 0f b0 54 bb 16'

InvSbox	anop		; inverse s-box
	dc h'52 09 6a d5 30 36 a5 38 bf 40 a3 9e 81 f3 d7 fb'
	dc h'7c e3 39 82 9b 2f ff 87 34 8e 43 44 c4 de e9 cb'
	dc h'54 7b 94 32 a6 c2 23 3d ee 4c 95 0b 42 fa c3 4e'
	dc h'08 2e a1 66 28 d9 24 b2 76 5b a2 49 6d 8b d1 25'
	dc h'72 f8 f6 64 86 68 98 16 d4 a4 5c cc 5d 65 b6 92'
	dc h'6c 70 48 50 fd ed b9 da 5e 15 46 57 a7 8d 9d 84'
	dc h'90 d8 ab 00 8c bc d3 0a f7 e4 58 05 b8 b3 45 06'
	dc h'd0 2c 1e 8f ca 3f 0f 02 c1 af bd 03 01 13 8a 6b'
	dc h'3a 91 11 41 4f 67 dc ea 97 f2 cf ce f0 b4 e6 73'
	dc h'96 ac 74 22 e7 ad 35 85 e2 f9 37 e8 1c 75 df 6e'
	dc h'47 f1 1a 71 1d 29 c5 89 6f b7 62 0e aa 18 be 1b'
	dc h'fc 56 3e 4b c6 d2 79 20 9a db c0 fe 78 cd 5a f4'
	dc h'1f dd a8 33 88 07 c7 31 b1 12 10 59 27 80 ec 5f'
	dc h'60 51 7f a9 19 b5 4a 0d 2d e5 7a 9f 93 c9 9c ef'
	dc h'a0 e0 3b 4d ae 2a f5 b0 c8 eb bb 3c 83 53 99 61'
	dc h'17 2b 04 7e ba 77 d6 26 e1 69 14 63 55 21 0c 7d'

Xtime2Sbox anop		; combined Xtimes2[Sbox[]]
	dc h'c6 f8 ee f6 ff d6 de 91 60 02 ce 56 e7 b5 4d ec'
	dc h'8f 1f 89 fa ef b2 8e fb 41 b3 5f 45 23 53 e4 9b'
	dc h'75 e1 3d 4c 6c 7e f5 83 68 51 d1 f9 e2 ab 62 2a'
	dc h'08 95 46 9d 30 37 0a 2f 0e 24 1b df cd 4e 7f ea'
	dc h'12 1d 58 34 36 dc b4 5b a4 76 b7 7d 52 dd 5e 13'
	dc h'a6 b9 00 c1 40 e3 79 b6 d4 8d 67 72 94 98 b0 85'
	dc h'bb c5 4f ed 86 9a 66 11 8a e9 04 fe a0 78 25 4b'
	dc h'a2 5d 80 05 3f 21 70 f1 63 77 af 42 20 e5 fd bf'
	dc h'81 18 26 c3 be 35 88 2e 93 55 fc 7a c8 ba 32 e6'
	dc h'c0 19 9e a3 44 54 3b 0b 8c c7 6b 28 a7 bc 16 ad'
	dc h'db 64 74 14 92 0c 48 b8 9f bd 43 c4 39 31 d3 f2'
	dc h'd5 8b 6e da 01 b1 9c 49 d8 ac f3 cf ca f4 47 10'
	dc h'6f f0 4a 5c 38 57 73 97 cb a1 e8 3e 96 61 0d 0f'
	dc h'e0 7c 71 cc 90 06 f7 1c c2 6a ae 69 17 99 3a 27'
	dc h'd9 eb 2b 22 d2 a9 07 33 2d 3c 15 c9 87 aa 50 a5'
	dc h'03 59 09 1a 65 d7 84 d0 82 29 5a 1e 7b a8 6d 2c'

Xtime3Sbox anop		; combined Xtimes3[Sbox[]]
	dc h'a5 84 99 8d 0d bd b1 54 50 03 a9 7d 19 62 e6 9a'
	dc h'45 9d 40 87 15 eb c9 0b ec 67 fd ea bf f7 96 5b'
	dc h'c2 1c ae 6a 5a 41 02 4f 5c f4 34 08 93 73 53 3f'
	dc h'0c 52 65 5e 28 a1 0f b5 09 36 9b 3d 26 69 cd 9f'
	dc h'1b 9e 74 2e 2d b2 ee fb f6 4d 61 ce 7b 3e 71 97'
	dc h'f5 68 00 2c 60 1f c8 ed be 46 d9 4b de d4 e8 4a'
	dc h'6b 2a e5 16 c5 d7 55 94 cf 10 06 81 f0 44 ba e3'
	dc h'f3 fe c0 8a ad bc 48 04 df c1 75 63 30 1a 0e 6d'
	dc h'4c 14 35 2f e1 a2 cc 39 57 f2 82 47 ac e7 2b 95'
	dc h'a0 98 d1 7f 66 7e ab 83 ca 29 d3 3c 79 e2 1d 76'
	dc h'3b 56 4e 1e db 0a 6c e4 5d 6e ef a6 a8 a4 37 8b'
	dc h'32 43 59 b7 8c 64 d2 e0 b4 fa 07 25 af 8e e9 18'
	dc h'd5 88 6f 72 24 f1 c7 51 23 7c 9c 21 dd dc 86 85'
	dc h'90 42 c4 aa d8 05 01 12 a3 5f f9 d0 91 58 27 b9'
	dc h'38 13 b3 33 bb 70 89 a7 b6 22 92 20 49 ff 78 7a'
	dc h'8f f8 80 17 da 31 c6 b8 c3 b0 77 11 cb fc d6 3a'

;Xtime2	anop
;	dc h'00 02 04 06 08 0a 0c 0e 10 12 14 16 18 1a 1c 1e'
;	dc h'20 22 24 26 28 2a 2c 2e 30 32 34 36 38 3a 3c 3e'
;	dc h'40 42 44 46 48 4a 4c 4e 50 52 54 56 58 5a 5c 5e'
;	dc h'60 62 64 66 68 6a 6c 6e 70 72 74 76 78 7a 7c 7e'
;	dc h'80 82 84 86 88 8a 8c 8e 90 92 94 96 98 9a 9c 9e'
;	dc h'a0 a2 a4 a6 a8 aa ac ae b0 b2 b4 b6 b8 ba bc be'
;	dc h'c0 c2 c4 c6 c8 ca cc ce d0 d2 d4 d6 d8 da dc de'
;	dc h'e0 e2 e4 e6 e8 ea ec ee f0 f2 f4 f6 f8 fa fc fe'
;	dc h'1b 19 1f 1d 13 11 17 15 0b 09 0f 0d 03 01 07 05'
;	dc h'3b 39 3f 3d 33 31 37 35 2b 29 2f 2d 23 21 27 25'
;	dc h'5b 59 5f 5d 53 51 57 55 4b 49 4f 4d 43 41 47 45'
;	dc h'7b 79 7f 7d 73 71 77 75 6b 69 6f 6d 63 61 67 65'
;	dc h'9b 99 9f 9d 93 91 97 95 8b 89 8f 8d 83 81 87 85'
;	dc h'bb b9 bf bd b3 b1 b7 b5 ab a9 af ad a3 a1 a7 a5'
;	dc h'db d9 df dd d3 d1 d7 d5 cb c9 cf cd c3 c1 c7 c5'
;	dc h'fb f9 ff fd f3 f1 f7 f5 eb e9 ef ed e3 e1 e7 e5'

Xtime9	anop
	dc h'00 09 12 1b 24 2d 36 3f 48 41 5a 53 6c 65 7e 77'
	dc h'90 99 82 8b b4 bd a6 af d8 d1 ca c3 fc f5 ee e7'
	dc h'3b 32 29 20 1f 16 0d 04 73 7a 61 68 57 5e 45 4c'
	dc h'ab a2 b9 b0 8f 86 9d 94 e3 ea f1 f8 c7 ce d5 dc'
	dc h'76 7f 64 6d 52 5b 40 49 3e 37 2c 25 1a 13 08 01'
	dc h'e6 ef f4 fd c2 cb d0 d9 ae a7 bc b5 8a 83 98 91'
	dc h'4d 44 5f 56 69 60 7b 72 05 0c 17 1e 21 28 33 3a'
	dc h'dd d4 cf c6 f9 f0 eb e2 95 9c 87 8e b1 b8 a3 aa'
	dc h'ec e5 fe f7 c8 c1 da d3 a4 ad b6 bf 80 89 92 9b'
	dc h'7c 75 6e 67 58 51 4a 43 34 3d 26 2f 10 19 02 0b'
	dc h'd7 de c5 cc f3 fa e1 e8 9f 96 8d 84 bb b2 a9 a0'
	dc h'47 4e 55 5c 63 6a 71 78 0f 06 1d 14 2b 22 39 30'
	dc h'9a 93 88 81 be b7 ac a5 d2 db c0 c9 f6 ff e4 ed'
	dc h'0a 03 18 11 2e 27 3c 35 42 4b 50 59 66 6f 74 7d'
	dc h'a1 a8 b3 ba 85 8c 97 9e e9 e0 fb f2 cd c4 df d6'
	dc h'31 38 23 2a 15 1c 07 0e 79 70 6b 62 5d 54 4f 46'

XtimeB	anop
	dc h'00 0b 16 1d 2c 27 3a 31 58 53 4e 45 74 7f 62 69'
	dc h'b0 bb a6 ad 9c 97 8a 81 e8 e3 fe f5 c4 cf d2 d9'
	dc h'7b 70 6d 66 57 5c 41 4a 23 28 35 3e 0f 04 19 12'
	dc h'cb c0 dd d6 e7 ec f1 fa 93 98 85 8e bf b4 a9 a2'
	dc h'f6 fd e0 eb da d1 cc c7 ae a5 b8 b3 82 89 94 9f'
	dc h'46 4d 50 5b 6a 61 7c 77 1e 15 08 03 32 39 24 2f'
	dc h'8d 86 9b 90 a1 aa b7 bc d5 de c3 c8 f9 f2 ef e4'
	dc h'3d 36 2b 20 11 1a 07 0c 65 6e 73 78 49 42 5f 54'
	dc h'f7 fc e1 ea db d0 cd c6 af a4 b9 b2 83 88 95 9e'
	dc h'47 4c 51 5a 6b 60 7d 76 1f 14 09 02 33 38 25 2e'
	dc h'8c 87 9a 91 a0 ab b6 bd d4 df c2 c9 f8 f3 ee e5'
	dc h'3c 37 2a 21 10 1b 06 0d 64 6f 72 79 48 43 5e 55'
	dc h'01 0a 17 1c 2d 26 3b 30 59 52 4f 44 75 7e 63 68'
	dc h'b1 ba a7 ac 9d 96 8b 80 e9 e2 ff f4 c5 ce d3 d8'
	dc h'7a 71 6c 67 56 5d 40 4b 22 29 34 3f 0e 05 18 13'
	dc h'ca c1 dc d7 e6 ed f0 fb 92 99 84 8f be b5 a8 a3' 

XtimeD	anop
	dc h'00 0d 1a 17 34 39 2e 23 68 65 72 7f 5c 51 46 4b'
	dc h'd0 dd ca c7 e4 e9 fe f3 b8 b5 a2 af 8c 81 96 9b'
	dc h'bb b6 a1 ac 8f 82 95 98 d3 de c9 c4 e7 ea fd f0'
	dc h'6b 66 71 7c 5f 52 45 48 03 0e 19 14 37 3a 2d 20'
	dc h'6d 60 77 7a 59 54 43 4e 05 08 1f 12 31 3c 2b 26'
	dc h'bd b0 a7 aa 89 84 93 9e d5 d8 cf c2 e1 ec fb f6'
	dc h'd6 db cc c1 e2 ef f8 f5 be b3 a4 a9 8a 87 90 9d'
	dc h'06 0b 1c 11 32 3f 28 25 6e 63 74 79 5a 57 40 4d'
	dc h'da d7 c0 cd ee e3 f4 f9 b2 bf a8 a5 86 8b 9c 91'
	dc h'0a 07 10 1d 3e 33 24 29 62 6f 78 75 56 5b 4c 41'
	dc h'61 6c 7b 76 55 58 4f 42 09 04 13 1e 3d 30 27 2a'
	dc h'b1 bc ab a6 85 88 9f 92 d9 d4 c3 ce ed e0 f7 fa'
	dc h'b7 ba ad a0 83 8e 99 94 df d2 c5 c8 eb e6 f1 fc'
	dc h'67 6a 7d 70 53 5e 49 44 0f 02 15 18 3b 36 21 2c'
	dc h'0c 01 16 1b 38 35 22 2f 64 69 7e 73 50 5d 4a 47'
	dc h'dc d1 c6 cb e8 e5 f2 ff b4 b9 ae a3 80 8d 9a 97' 

XtimeE	anop
	dc h'00 0e 1c 12 38 36 24 2a 70 7e 6c 62 48 46 54 5a'
	dc h'e0 ee fc f2 d8 d6 c4 ca 90 9e 8c 82 a8 a6 b4 ba'
	dc h'db d5 c7 c9 e3 ed ff f1 ab a5 b7 b9 93 9d 8f 81'
	dc h'3b 35 27 29 03 0d 1f 11 4b 45 57 59 73 7d 6f 61'
	dc h'ad a3 b1 bf 95 9b 89 87 dd d3 c1 cf e5 eb f9 f7'
	dc h'4d 43 51 5f 75 7b 69 67 3d 33 21 2f 05 0b 19 17'
	dc h'76 78 6a 64 4e 40 52 5c 06 08 1a 14 3e 30 22 2c'
	dc h'96 98 8a 84 ae a0 b2 bc e6 e8 fa f4 de d0 c2 cc'
	dc h'41 4f 5d 53 79 77 65 6b 31 3f 2d 23 09 07 15 1b'
	dc h'a1 af bd b3 99 97 85 8b d1 df cd c3 e9 e7 f5 fb'
	dc h'9a 94 86 88 a2 ac be b0 ea e4 f6 f8 d2 dc ce c0'
	dc h'7a 74 66 68 42 4c 5e 50 0a 04 16 18 32 3c 2e 20'
	dc h'ec e2 f0 fe d4 da c8 c6 9c 92 80 8e a4 aa b8 b6'
	dc h'0c 02 10 1e 34 3a 28 26 7c 72 60 6e 44 4a 58 56'
	dc h'37 39 2b 25 0f 01 13 1d 47 49 5b 55 7f 71 63 6d'
	dc h'd7 d9 cb c5 ef e1 f3 fd a7 a9 bb b5 9f 91 83 8d'

Rcon	anop
	dc h'01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	dc h'02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	dc h'04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	dc h'08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	dc h'10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	dc h'20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	dc h'40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	dc h'80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	dc h'1b 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	dc h'36 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00'
	end

state1	gequ	0
state2	gequ	16
keysize	gequ	32
rk	gequ	33


* Callable from C, with state structure pointer on stack.
aes_expandkey128 start
	phb
	plx
	ply
	tdc
	pld
	plb
	plb
	phy
	phx
	plb
	pha
	jsl	ExpandKey128
	pld
	rtl
	end


* Call with DP = AES state structure (with key expanded),
*           DP = bank containing AES tables.
ExpandKey128 start
	using	tables

	ldx	#16
	clc

top	anop
	ShortRegs
	
	ldy	rk-3,x
	lda	Sbox,y
	eor	Rcon-16,x
	eor	rk-16,x
	sta	rk,x
	
	ldy	rk-2,x
	lda	Sbox,y
	eor	rk+1-16,x
	sta	rk+1,x
	
	ldy	rk-1,x
	lda	Sbox,y
	eor	rk+2-16,x
	sta	rk+2,x
	
	ldy	rk-4,x
	lda	Sbox,y
	eor	rk+3-16,x
	sta	rk+3,x

	LongRegs

	lda	rk+0,x
	eor	rk+0+4-16,x
	sta	rk+0+4,x
	eor	rk+4+4-16,x
	sta	rk+4+4,x
	eor	rk+8+4-16,x
	sta	rk+8+4,x
	
	lda	rk+2,x
	eor	rk+2+4-16,x
	sta	rk+2+4,x
	eor	rk+6+4-16,x
	sta	rk+6+4,x
	eor	rk+10+4-16,x
	sta	rk+10+4,x

	txa
	adc	#16
	tax
	cmp	#16*12
	blt	top
	rtl
	end


* Callable from C, with state structure pointer on stack.
aes_encrypt start
	phb
	plx
	ply
	tdc
	pld
	plb
	plb
	phy
	phx
	plb
	pha
	jsl	AES_ENCRYPT
	pld
	rtl
	end


* Call with DP = AES state structure (with key expanded),
*           DP = bank containing AES tables.
AES_ENCRYPT start
	using	tables

	AddInitialRoundKey

	ShortRegs

	NormalRound 1
	NormalRound 2
	NormalRound 3
	NormalRound 4
	NormalRound 5
	NormalRound 6
	NormalRound 7
	NormalRound 8
	NormalRound 9

	FinalRound 10
	
	LongRegs

	rtl
	end