A2osX/LIB/LIBCRYPT.S.txt

NEW
  AUTO 3,1
				.LIST OFF	
				.OP	65C02
				.OR	$2000
				.TF lib/libcrypt
*--------------------------------------
				.INB inc/macros.i
				.INB inc/a2osx.i
				.INB inc/libcrypt.i
*--------------------------------------
				.DUMMY
				.OR ZPLIB
ZS.START
ZPCtxPtr		.BS 2
ZPDataPtr		.BS 2
ZPHashPtr		.BS 2
ZPChunkLen		.BS 2

MD4.ABCD
MD5.ABCD
MD4.A
MD5.A			.BS 4					Chunk Level,A,B,C,D
MD4.B
MD5.B			.BS 4
MD4.C
MD5.C			.BS 4
MD4.D
MD5.D			.BS 4

MD4.F1
MD5.F1			.BS 4
MD4.F2
MD5.F2			.BS 4

ZS.END			.ED
*--------------------------------------
* DWORD Macros : Do NOT disturb carry with cpx, cpy...
*--------------------------------------
				.MA	ADC32
				ldy #3
				ldx #0
				clc
:1				lda ]1,x
				adc ]2,x
				sta ]3,x
				inx
				dey
				bpl :1
				.EM
*--------------------------------------
				.MA	AND32
				ldx #3
:1				lda ]1,x
				and ]2,x
				sta ]3,x
				dex
				bpl :1
				.EM
*--------------------------------------
				.MA	ORA32
				ldx #3
:1				lda ]1,x
				ora ]2,x
				sta ]3,x
				dex
				bpl :1
				.EM
*--------------------------------------
				.MA	EOR32
				ldx #3
:1				lda ]1,x
				eor ]2,x
				sta ]3,x
				dex
				bpl :1
				.EM
*--------------------------------------
				.MA	NOT32
				ldx #3
:1				lda ]1,x
				eor #$FF
				sta ]2,x
				dex
				bpl :1
				.EM
*--------------------------------------
				.MA	MOV32
				ldx #3
:1				lda ]1,x
				sta ]2,x
				dex
				bpl :1
				.EM
*--------------------------------------
				.MA	ROL32x
:2				lda ]1+3
				rol
				rol ]1
				rol ]1+1
				rol ]1+2
				rol ]1+3
				dex
				bne :2
				.EM
*--------------------------------------
*			File Header (16 Bytes)
*--------------------------------------
CS.START		cld
				jmp (.1,x)
				.DA #$61				6502,Level 1 (65c02)
				.DA #1					BIN Layout Version 1
				.DA 0
				.DA CS.END-CS.START
				.DA 0
				.DA 0
				.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1				.DA LIB.LOAD
				.DA LIB.UNLOAD
				.DA MD4
				.DA MD4Init
				.DA MD4Update
				.DA MD4Finalize
				.DA HMACMD5
*--------------------------------------
J.MD4.XXXX		.DA MD4.0015
				.DA MD4.1631
				.DA MD4.3247
J.MD5.XXXX		.DA MD5.0015
				.DA MD5.1631
				.DA MD5.3247
				.DA MD5.4863
L.HMACMD5.IPAD	.DA HMACMD5.IPAD
L.HMACMD5.OPAD	.DA HMACMD5.OPAD
				.DA 0
*--------------------------------------
LIB.LOAD
LIB.UNLOAD		clc
				rts
*/--------------------------------------
* ## MD4
* Return MD4 Hash for input String
* # C
* `void MD4 (const char* str, char* digest);`
* # ASM
* `>PUSHW str`
* `>PUSHW digest`
* `>LIBCALL hLIBCRYPT,LIBCRYPT.MD4`
* ## RETURN VALUE
* CC
*\--------------------------------------
MD4				>PULLW ZPHashPtr
				>PULLYA
				>STYA ZPDataPtr
				>SYSCALL2 strlen
				>STYA ZPDataLen
.1				jsr MDxInit.I
				bcs .9

				pha						save MD4 Context hMem

				jsr MD4Update.I
				jsr MDxFinalize.I

				pla
				>SYSCALL2 FreeMem		Free MD4 Context
				clc
.9				rts
*/--------------------------------------
* ## MD4Init
* Initialize a MD4 computation
* # C
* `hMD4 MD4init();`
* # ASM
* `>LIBCALL hLIBCRYPT,LIBCRYPT.MD4Init`
* ## RETURN VALUE
* A = hMem To S.MD4
*\--------------------------------------
MD4Init			
MDxInit.I		>LDYAI S.MD4
				>SYSCALL2 getmem
				bcs MDxInit.9

				>STYA ZPCtxPtr

MD5Reset.I		ldy #0

.1				lda MD4.ABCDINIT,y
				sta (ZPCtxPtr),y
				iny
				cpy #S.MD4.BITCOUNT
				bne .1

				lda #0

.2				sta	(ZPCtxPtr),y
				iny
				cpy #S.MD4				Includes S.MD4/5.FINALIZED Flag
				bne .2

				txa
				clc
MDxInit.9		rts
*/--------------------------------------
* ## MD4Update
* Add Data to MD4 computation
* # C
* `void MD4update (hMD4 MD4, char* data, int len);`
* # ASM
* `>PUSHB MD4`
* `>PUSHW data`
* `>PUSHW len`
* `>hLIBCRYPT,LIBCRYPT.MD4Update`
* ## RETURN VALUE
*\--------------------------------------
MD4Update		>PULLW ZPDataLen		get LEN
				>PULLW ZPDataPtr		get DATA

				>PULLA
				>SYSCALL2 GetMemPtr	get MD5 Context
				>STYA ZPCtxPtr

MD4Update.I		clc
				.HS B0					BCS
				
MD5Update.I		sec

				ror MD.MODE
				
				ldy #S.MD4.FINALIZED
				lda (ZPCtxPtr),y
				beq .1

				sec
				rts

.1				lda ZPDataLen+1			More than 256 Bytes remaining to hash ?
				bne .3					yes

				lda ZPDataLen
				bne .2					Len = O ? 

				clc						All data processed
				rts

.2				cmp #64					More than 64 Bytes remaining to hash ?
				bcc .50					yes

.3				lda #64

.50				sta ZPChunkLen			Save Chunk Len
				jsr MDxUpdateBitCnt

				ldy #0

.51				lda (ZPDataPtr),y		Load Buffer with data
				sta MD4.BUFFER64,y
				iny
				cpy ZPChunkLen
				bne .51

				cpy #64					Full 64 Bytes DATA ?
				beq .58
* Append "$80" & Padding & original size
			
				lda #$80				no, Append $80
.52				sta MD5.BUFFER64,y

				asl
*				lda #0

				iny						Pad with 0 to 64 
				cpy #64
				bcc .52

				ldy #S.MD4.EXTRABIT		Mark MD5 Context as Appended
				ror
*				lda #$80
				sta (ZPCtxPtr),y
				lda ZPChunkLen
				cmp #56					Enough room for BITCOUNT ?
				bcs .58					no

				jsr MDxAppendBitCnt

.58				jsr MDxTransform

				jsr MDxUpdateABCD0

.8				lda ZPDataLen			Substract Bytes processed from LEN
				sec
				sbc ZPChunkLen			get back chunk Len
				sta ZPDataLen
				bcs .81

				dec ZPDataLen+1

.81				lda ZPDataPtr			Add Bytes processed to DATA
				clc
				adc ZPChunkLen
				sta ZPDataPtr
				bcc .1

				inc ZPDataPtr+1
				bra .1
*/--------------------------------------
* ## MD4Finalize
* # C
* `void MD4finalize (hMD4 MD4, char* digest);`
* # ASM
* `>PUSHB MD4`
* `>PUSHW digest`
* `>LIBCALL hLIBCRYPT,LIBCRYPT.MD4Finalize`
* ## RETURN VALUE
*\--------------------------------------
MD4Finalize		>PULLW ZPHashPtr
				>PULLA
				pha
				>SYSCALL2 GetMemPtr
				>STYA ZPCtxPtr			get MD5 Context

				jsr MDxFinalize.I

				pla
				>SYSCALL2 FreeMem
				rts

MDxFinalize.I	ldy #S.MD4.FINALIZED

				lda (ZPCtxPtr),y
				bne .11

				jsr MDxExtraChunk

.11				ldy #0

.1				lda (ZPCtxPtr),y
				lsr
				lsr
				lsr
				lsr
				tax
				lda MD4.DIGITS,x
				jsr .7

				lda (ZPCtxPtr),y
				and #$0F
				tax
				lda MD4.DIGITS,x
				jsr .7

				iny
				cpy #16
				bne .1

				lda #0
				sta (ZPHashPtr)
				clc
				rts

.7				sta (ZPHashPtr)
				inc ZPHashPtr
				bne MDxFinalize.RTS

				inc ZPHashPtr+1

MDxFinalize.RTS	rts
*/--------------------------------------
* ## HMACMD5
* Return HMACMD5 Hash for input String
* # C
* `void HMACMD5(const char* str, const char* key, char* digest);`
* # ASM
* `>PUSHW str`
* `>PUSHW key`
* `>PUSHW digest`
* `>LIBCALL hLIBCRYPT,LIBCRYPT.HMACMD5`
* ## RETURN VALUE
* CC
*\--------------------------------------
* https://github.com/fab13n/org.eclipse.mihini/blob/master/libs/hmac-md5/hmac_rfc2104/hmac-md5.c
*--------------------------------------
HMACMD5			>PULLW ZPHashPtr
				>PULLW ZPDataPtr
				>PULLW HMAC.DTemp

				jsr MDxInit.I
				bcs MDxFinalize.RTS
			
				pha

				>LDYA ZPDataPtr
				>SYSCALL2 strlen
				>STYA ZPDataLen
				cpy #65
				bcs .2

				tay
				beq .4

.2				>PUSHW ZPHashPtr
				jsr MD5Update.I
				jsr MDxFinalize.I

				>PULLW ZPHashPtr
				>LDYA ZPCtxPtr
				>STYA ZPDataPtr

				lda #16
				sta ZPDataLen

.4				ldy #0

.5				lda #$36
				cpy ZPDataLen
				bcs .6

				eor (ZPDataPtr),y

.6				sta HMACMD5.IPAD,y
				eor #$6A				#$36 eor #$5C
				sta HMACMD5.OPAD,y
				iny
				cpy #64
				bne .5

				stz HMACMD5.IPAD+64
				stz HMACMD5.OPAD+64

				jsr MD5Reset.I

				>LDYA L.HMACMD5.IPAD
				>STYA ZPDataPtr
				>LDYAI 64
				>STYA ZPDataLen
				>PUSHW ZPHashPtr
				jsr MD5Update.I

				>LDYA HMAC.DTemp
				>STYA ZPDataPtr
				>SYSCALL2 strlen
				>STYA ZPDataLen
				jsr MD5Update.I

				jsr MDxFinalize.I

				>PULLW ZPHashPtr

				ldy #0

.8				lda (ZPCtxPtr),y
				sta HMACMD5.IPAD,y
				iny
				cpy #16
				bne .8

				jsr MD5Reset.I

				>LDYA L.HMACMD5.OPAD
				>STYA ZPDataPtr
				>LDYAI 64
				>STYA ZPDataLen
				jsr MD5Update.I

				>LDYA L.HMACMD5.IPAD
				>STYA ZPDataPtr

				ldy #16
				sty ZPDataLen
				jsr MD5Update.I

				jsr MDxFinalize.I
				
				pla
				>SYSCALL2 FreeMem

				rts
*--------------------------------------
* https://waterjuiceweb.wordpress.com/aes/
*--------------------------------------
*			PRIVATE
*--------------------------------------
* MDxAppendBitCount
*  In :
*   ZPCtxPtr = MD4 Context
*--------------------------------------
MDxAppendBitCnt	ldx #56
				ldy #S.MD4.BITCOUNT		Append 8 Bytes of BITCOUNT

.1				lda (ZPCtxPtr),y
				sta MD4.BUFFER64,x
				inx
				iny
				cpy #S.MD4.BITCOUNT+8
				bne .1

				ldy #S.MD4.FINALIZED	Mark MD5 Context as Finalized
				lda #$80
				sta (ZPCtxPtr),y
				rts
*--------------------------------------
* MDxUpdateBitCnt
*  In :
*   CL = Size (in bytes) to add to MDx context
*   ZPCtxPtr = MDx Context
*--------------------------------------
MDxUpdateBitCnt	stz ZPChunkLen+1
				lda ZPChunkLen
				asl
				rol ZPChunkLen+1
				asl						times 8 to get bit count
				rol ZPChunkLen+1
				asl
				rol ZPChunkLen+1
				clc
				ldy #S.MD4.BITCOUNT
				adc (ZPCtxPtr),y
				sta (ZPCtxPtr),y
				iny
				lda ZPChunkLen+1
				adc (ZPCtxPtr),y
				sta (ZPCtxPtr),y
				bcc .8

.1				iny
				lda (ZPCtxPtr),y
				inc
				sta (ZPCtxPtr),y
				bne .8

				cpy #7
				bne .1

.8				rts
*--------------------------------------
* MDxExtraChunk
*  In : 
*   ZPCtxPtr = MDx Context
*--------------------------------------
MDxExtraChunk	ldy #S.MD4.FINALIZED
				lda #$80
				sta (ZPCtxPtr),y		Mark MD5 Context as "finalized"
				ldx #0
				ldy #S.MD4.EXTRABIT		Extra Bit already appended ?
				lda (ZPCtxPtr),y
				bne .1

				lda #$80
				sta MD4.BUFFER64		Add extra bit to buffer
				sta (ZPCtxPtr),y		Mark Extrabit added
				inx

.1				stz MD5.BUFFER64,x		pad with "0"...
				inx
				cpx #56
				bne .1					...until room for bitcount

				jsr MDxAppendBitCnt
				jsr MDxTransform
*--------------------------------------
* MDxUpdateABCD0
*  In: 
*   ZPCtxPtr = MDx Context
*--------------------------------------
MDxUpdateABCD0	ldy #0

.1				clc						ADC32 A+A0->A0, B, C, D.... 

.2				lda MD4.ABCD,y
				adc (ZPCtxPtr),y
				sta (ZPCtxPtr),y
				iny
				tya
				and #3
				bne .2

				cpy #16
				bne .1

				rts
*--------------------------------------
MDxTransform	bit MD.MODE
				bpl MD4Transform
				
				jmp MD5Transform
*--------------------------------------
* MD4Transform 
*  In: 
*   ZPCtxPtr = MD4 Context
*   512 Bits Padded chunk in MD4.BUFFER64
*  Out:
*   Updated MD4.ABCD
* https://tools.ietf.org/html/rfc1320	MD4
*--------------------------------------
MD4Transform	ldy #15					init ABCD Chunk with Context ABCD0

.1				lda (ZPCtxPtr),y
				sta MD4.ABCD,y
				dey
				bpl .1

				stz MD4.i				Start Proceed 0 to 47 bytes
				lda #0					lda MD4.i

.2				lsr
				lsr
				lsr
				and #6
				cmp #6
				bne .3
				lda #0

.3				tax

				jsr MD4.XXXX

				inc MD5.i
				lda MD5.i
				cmp #48
				bne .2

				rts
*--------------------------------------
MD4.XXXX		jmp (J.MD4.XXXX,x)
*--------------------------------------
MD4.0015		>NOT32 MD4.B,MD4.F2
				>AND32 MD4.B,MD4.C,MD4.F1
				>AND32 MD4.F2,MD4.D,MD4.F2
				>ORA32 MD4.F1,MD4.F2,MD4.F
				bra MD4.XXXX.END
*--------------------------------------
MD4.1631		>AND32 MD4.B,MD4.C,MD4.F1
				>AND32 MD4.B,MD4.D,MD4.F2
				>ORA32 MD4.F1,MD4.F2,MD4.F1
				>AND32 MD4.C,MD4.D,MD4.F2
				>ORA32 MD4.F1,MD4.F2,MD4.F
				bra MD4.XXXX.END
*--------------------------------------
MD4.3247		>EOR32 MD4.B,MD4.C,MD4.F
				>EOR32 MD4.F,MD4.D,MD4.F
*--------------------------------------
MD4.XXXX.END	>MOV32 MD4.D,MD4.DTemp
				>MOV32 MD4.C,MD4.D
				>MOV32 MD4.B,MD4.C
				>ADC32 MD4.A,MD4.F,MD4.B
				lda MD4.i
				lsr
				lsr
				and #$0C
				beq .3

				tay

				ldx #0
				clc

.1				lda MD4.K-4,y 			ADC32 MD4.K[i],MD4.F,MD4.F
				adc MD4.B,x
				sta MD4.B,x
				iny
				inx
				txa
				eor #4					DO NOT DISTURB carry with cpx !!!
				bne .1

.3				tax
				ldy MD4.i
				lda MD4.g,y
				asl
				asl
				tay

				clc

.2				lda MD4.BUFFER64,y		ADC32 M[g],MD4.F,MD4.F
				adc MD4.B,x
				sta MD4.B,x
				iny
				inx
				txa
				eor #4					DO NOT DISTURB carry with cpx !!!
				bne .2

				ldy MD4.i
				ldx MD4.s,y				get s[i] in x

				>ROL32x MD4.B
				>MOV32 MD4.DTemp,MD4.A
				rts
*--------------------------------------
* MD5Transform 
*  In: 
*   ZPCtxPtr = MD5 Context
*   512 Bits Padded chunk in MD5.BUFFER64
*  Out:
*   Updated MD5.ABCD
* https://tools.ietf.org/html/rfc1321	MD5
*--------------------------------------
MD5Transform	ldy #15					init ABCD Chunk with Context ABCD0

.1				lda (ZPCtxPtr),y
				sta MD5.ABCD,y
				dey
				bpl .1

				stz MD5.i				Start Proceed 0 to 63 bytes
				lda #0					lda MD5.i

.2				lsr
				lsr
				lsr
				and #6
				tax

				jsr MD5.XXXX

				inc MD5.i
				lda MD5.i
				cmp #64
				bne .2

				rts
*--------------------------------------
MD5.XXXX		jmp (J.MD5.XXXX,x)
*--------------------------------------
MD5.0015		>NOT32 MD5.B,MD5.F2
				>AND32 MD5.B,MD5.C,MD5.F1
				>AND32 MD5.F2,MD5.D,MD5.F2
				>ORA32 MD5.F1,MD5.F2,MD5.F
				bra MD5.XXXX.END
*--------------------------------------
MD5.1631		>NOT32 MD5.D,MD5.F2
				>AND32 MD5.D,MD5.B,MD5.F1
				>AND32 MD5.F2,MD5.C,MD5.F2
				>ORA32 MD5.F1,MD5.F2,MD5.F
				bra MD5.XXXX.END
*--------------------------------------
MD5.3247		>EOR32 MD5.B,MD5.C,MD5.F
				>EOR32 MD5.F,MD5.D,MD5.F
				bra MD5.XXXX.END
*--------------------------------------
MD5.4863		>NOT32 MD5.D,MD5.F1
				>ORA32 MD5.F1,MD5.B,MD5.F2
				>EOR32 MD5.F2,MD5.C,MD5.F
*--------------------------------------
MD5.XXXX.END	>MOV32 MD5.D,MD5.DTemp
				>MOV32 MD5.C,MD5.D
				>MOV32 MD5.B,MD5.C
				>ADC32 MD5.A,MD5.F,MD5.F
				lda MD5.i
				asl
				asl
				tay

				ldx #0
				clc

.1				lda MD5.K,y 			ADC32 MD5.K[i],MD5.F,MD5.F
				adc MD5.F,x
				sta MD5.F,x
				iny
				inx
				txa
				eor #4					DO NOT DISTURB carry with cpx !!!
				bne .1

				tax
				ldy MD5.i
				lda MD5.g,y
				asl
				asl
				tay

				clc

.2				lda MD5.BUFFER64,y		ADC32 M[g],MD5.F,MD5.F
				adc MD5.F,x
				sta MD5.F,x
				iny
				inx
				txa
				eor #4					DO NOT DISTURB carry with cpx !!!
				bne .2

				ldy MD5.i
				ldx MD5.s,y				get s[i] in x

				>ROL32x MD5.F
				>ADC32 MD5.B,MD5.F,MD5.B
				>MOV32 MD5.DTemp,MD5.A
				rts
*--------------------------------------
CS.END
MD4.ABCDINIT	.HS 01234567.89ABCDEF.FEDCBA98.76543210
*--------------------------------------
MD4.s			.DA #3,#7,#11,#19,#3,#7,#11,#19,#3,#7,#11,#19,#3,#7,#11,#19
				.DA #3,#5,#9,#13,#3,#5,#9,#13,#3,#5,#9,#13,#3,#5,#9,#13
				.DA #3,#9,#11,#15,#3,#9,#11,#15,#3,#9,#11,#15,#3,#9,#11,#15
*--------------------------------------
MD4.g			.DA #0,#1,#2,#3,#4,#5,#6,#7,#8,#9,#10,#11,#12,#13,#14,#15
				.DA #0,#4,#8,#12,#1,#5,#9,#13,#2,#6,#10,#14,#3,#7,#11,#15
				.DA #0,#8,#4,#12,#2,#10,#6,#14,#1,#9,#5,#13,#3,#11,#7,#15
*--------------------------------------
MD4.K			.HS 9979825A.A1EBD96E
*--------------------------------------
MD5.s			.DA #7,#12,#17,#22,#7,#12,#17,#22,#7,#12,#17,#22,#7,#12,#17,#22
				.DA #5,#9,#14,#20,#5,#9,#14,#20,#5,#9,#14,#20,#5,#9,#14,#20
				.DA #4,#11,#16,#23,#4,#11,#16,#23,#4,#11,#16,#23,#4,#11,#16,#23
				.DA #6,#10,#15,#21,#6,#10,#15,#21,#6,#10,#15,#21,#6,#10,#15,#21
*--------------------------------------
MD5.g			.DA #0,#1,#2,#3,#4,#5,#6,#7,#8,#9,#10,#11,#12,#13,#14,#15
				.DA #1,#6,#11,#0,#5,#10,#15,#4,#9,#14,#3,#8,#13,#2,#7,#12
				.DA #5,#8,#11,#14,#1,#4,#7,#10,#13,#0,#3,#6,#9,#12,#15,#2
				.DA #0,#7,#14,#5,#12,#3,#10,#1,#8,#15,#6,#13,#4,#11,#2,#9
*--------------------------------------
MD5.K			.HS 78A46AD7.56B7C7E8.DB702024.EECEBDC1
				.HS AF0F7CF5.2AC68747.134630A8.019546FD
				.HS D8988069.AFF7448B.B15BFFFF.BED75C89
				.HS 2211906B.937198FD.8E4379A6.2108B449
				.HS 62251EF6.40B340C0.515A5E26.AAC7B6E9
				.HS 5D102FD6.53144402.81E6A1D8.C8FBD3E7
				.HS E6CDE121.D60737C3.870DD5F4.ED145A45
				.HS 05E9E3A9.F8A3EFFC.D9026F67.8A4C2A8D
				.HS 4239FAFF.81F67187.22619D6D.0C38E5FD
				.HS 44EABEA4.A9CFDE4B.604BBBF6.70BCBFBE
				.HS C67E9B28.FA27A1EA.8530EFD4.051D8804
				.HS 39D0D4D9.E599DBE6.F87CA21F.6556ACC4
				.HS 442229F4.97FF2A43.A72394AB.39A093FC
				.HS C3595B65.92CC0C8F.7DF4EFFF.D15D8485
				.HS 4F7EA86F.E0E62CFE.144301A3.A111084E
				.HS 827E53F7.35F23ABD.BBD2D72A.91D386EB
*--------------------------------------
MD4.DIGITS		.AS "0123456789abcdef"
*--------------------------------------
ZPDataLen		.BS 2

MD.MODE			.BS 1

MD4.DTemp
MD5.DTemp		.BS 4
MD4.F
MD5.F			.BS 4
MD4.i
MD5.i			.BS 1
MD4.BUFFER64
MD5.BUFFER64	.BS 64
HMAC.DTemp		.BS 4
HMACMD5.IPAD	.BS 65
HMACMD5.OPAD	.BS 65
*--------------------------------------
MAN
SAVE usr/src/lib/libcrypt.s
ASM