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A2osX/SYS/KERNEL.S.MD5X.txt

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Kernel 0.93++
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NEW
AUTO 3,1
*--------------------------------------
.DUMMY
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.OR ZPTMP 29 bytes
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ZS.START
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ZPCtxPtr .BS 2
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ZPDataLen .BS 2
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ZPChunkLen .BS 2
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ZS.END .ED
*--------------------------------------
* DWORD Macros : Do NOT disturb carry with cpx, cpy...
*--------------------------------------
.MA ADC32
ldx #3
ldy #0
clc
:1 lda ]1,y
adc ]2,y
sta ]3,y
iny
dex
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
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*--------------------------------------
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MD5X.Init >LDYAI S.MD5
>SYSCALL2 getmem0
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bcs .9
>STYA ZPCtxPtr
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ldy #15
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.1 lda MD5.ABCDINIT,y
sta (ZPCtxPtr),y
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dey
bpl .1
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txa
clc
.9 rts
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*--------------------------------------
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MD5X.Update ldy #S.MD5.FINALIZED
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lda (ZPCtxPtr),y
beq .1
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sec
rts
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.1 lda ZPDataLen+1 More than 256 Bytes remaining to hash ?
bne .3 yes
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lda ZPDataLen
bne .2 Len = O ?
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clc All data processed
rts
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.2 cmp #64 More than 64 Bytes remaining to hash ?
bcc .50 yes
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.3 lda #64
.50 sta ZPChunkLen Save Chunk Len
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jsr MD5UpdateBitCount
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ldy #0
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.51 jsr SHARED.TXTPTR.GetY Load Buffer with data
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sta MD5.BUFFER64,y
iny
cpy ZPChunkLen
bne .51
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cpy #64 Full 64 Bytes DATA ?
beq .58
* Append "$80" & Padding & original size
lda #$80 no, Append $80
sta MD5.BUFFER64,y
lda #0
.52 iny Pad with 0 to 64
cpy #64
beq .53
sta MD5.BUFFER64,y
bra .52
.53 ldy #S.MD5.EXTRABIT Mark MD5 Context as Appended
lda #$80
sta (ZPCtxPtr),y
lda ZPChunkLen
cmp #56 Enough room for BITCOUNT ?
bcs .58 no
jsr MD5AppendBitCount
.58 jsr MD5Transform
jsr MD5UpdateABCD0
.8 lda ZPDataLen Substract Bytes processed from LEN
sec
sbc ZPChunkLen get back chunk Len
sta ZPDataLen
bcs .81
dec ZPDataLen+1
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.81 lda TXTPTR Add Bytes processed to DATA
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clc
adc ZPChunkLen
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sta TXTPTR
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bcc .1
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inc TXTPTR+1
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bra .1
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*--------------------------------------
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MD5X.Finalize ldy #S.MD5.FINALIZED
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lda (ZPCtxPtr),y
bne .11
jsr MD5ExtraChunk
.11 ldy #S.MD5.ABCD0
.1 lda (ZPCtxPtr),y
lsr
lsr
lsr
lsr
tax
lda MD5.DIGITS,x
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jsr SHARED.FORPNT.PutNext
lda (ZPCtxPtr),y
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and #$0F
tax
lda MD5.DIGITS,x
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jsr SHARED.FORPNT.PutNext
iny
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cpy #S.MD5.ABCD0+16
bne .1
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lda #0
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jsr SHARED.FORPNT.PutNext
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clc
.9 rts
*--------------------------------------
* PRIVATE
*--------------------------------------
* MD5AppendBitCount
* In :
* ZPCtxPtr = MD5 Context
*--------------------------------------
MD5AppendBitCount
ldx #56
ldy #S.MD5.BITCOUNT Append 8 Bytes of BITCOUNT
.1 lda (ZPCtxPtr),y
sta MD5.BUFFER64,x
inx
iny
cpy #S.MD5.BITCOUNT+8
bne .1
ldy #S.MD5.FINALIZED Mark MD5 Context as Finalized
lda #$80
sta (ZPCtxPtr),y
rts
*--------------------------------------
* MD5UpdateBitCount
* In :
* CL = Size (in bytes) to add to MD5 context
* ZPCtxPtr = MD5 Context
*--------------------------------------
MD5UpdateBitCount
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.MD5.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
*--------------------------------------
* MD5ExtraChunk
* In :
* ZPCtxPtr = MD5 Context
*--------------------------------------
MD5ExtraChunk ldy #S.MD5.FINALIZED
lda #$80
sta (ZPCtxPtr),y Mark MD5 Context as "finalized"
ldx #0
ldy #S.MD5.EXTRABIT Extra Bit already appended ?
lda (ZPCtxPtr),y
bne .1
lda #$80
sta MD5.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 MD5AppendBitCount
jsr MD5Transform
*--------------------------------------
* MD5UpdateABCD0
* In:
* ZPCtxPtr = MD5 Context
*--------------------------------------
MD5UpdateABCD0 ldy #0
.1 clc ADC32 A+A0->A0, B, C, D....
.2 lda MD5.ABCD,y
adc (ZPCtxPtr),y
sta (ZPCtxPtr),y
iny
tya
and #3
bne .2
cpy #16
bne .1
rts
*--------------------------------------
* MD5Transform
* In:
* ZPCtxPtr = MD5 Context
* 512 Bits Padded chunk in MD5.BUFFER64
* Out:
* Updated MD5.ABCD
*--------------------------------------
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 (.1,x)
.1 .DA MD5.0015
.DA MD5.1631
.DA MD5.3247
.DA MD5.4863
*--------------------------------------
MD5.0015 >AND32 MD5.B,MD5.C,MD5.F1
>NOT32 MD5.B,MD5.F2
>AND32 MD5.F2,MD5.D,MD5.F2
>ORA32 MD5.F1,MD5.F2,MD5.F
jmp MD5.XXXX.END
*--------------------------------------
MD5.1631 >AND32 MD5.D,MD5.B,MD5.F1
>NOT32 MD5.D,MD5.F2
>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
ldy MD5.i
lda MD5.g,y
asl
asl
tay
ldx #0
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
MD5.ABCDINIT .HS 01234567.89ABCDEF.FEDCBA98.76543210
*--------------------------------------
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
*--------------------------------------
Kernel 0.93++
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MD5.DIGITS .AS "0123456789abcdef"
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*--------------------------------------
MD5.ABCD
MD5.A .BS 4 Chunk Level,A,B,C,D
MD5.B .BS 4
MD5.C .BS 4
MD5.D .BS 4
MD5.F1 .BS 4
MD5.F2 .BS 4
MD5.DTemp .BS 4
MD5.F .BS 4
MD5.i .BS 1
MD5.BUFFER64 .BS 64
*--------------------------------------
MAN
SAVE USR/SRC/SYS/KERNEL.S.MD5X
LOAD USR/SRC/SYS/KERNEL.S
ASM
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