Apple-2gs-SW
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65816-crypto
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Use operations on bytes to rotate by multiples of 8 in SHA-256.

This commit is contained in:
Stephen Heumann 2017-07-03 15:07:58 -05:00
parent 64fc1e62bb
commit 6940f1fef4
1 changed files with 40 additions and 4 deletions
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44
sha256.macros
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@ -229,7 +229,16 @@
; compute the rest of the message schedule (W_16 to W_63)
&i seta (&part-1)*16
.loop2
ROTR4MOVE_w temp1,&i-15,7
lda_w &i-15,1
sta temp1
lda_w &i-15,-1
and #$FF00
sta temp1+2
lda_w &i-15,3
and #$00FF
ora temp1+2
sta temp1+2
ROTL4 temp1,1
lda_w &i-15
sta temp2+2
lda_w &i-15,2
@ -252,7 +261,16 @@
sta temp2
ROTR4 temp2,1
ROTR4MOVE temp3,temp2,2
ROTL4MOVE temp4,temp2,7
lda temp2+1
sta temp4+2
lda temp2-1
and #$FF00
sta temp4
lda temp2+3
and #$00FF
ora temp4
sta temp4
ROTR4 temp4,1
lda temp4
eor temp3
eor temp2
@ -299,9 +317,27 @@
BlockLoopIter &a,&b,&c,&d,&e,&f,&g,&h,&iter
; Sigma_1 computation
ROTR4MOVE temp1,&e,6
lda &e+1
sta temp1
lda &e-1
and #$FF00
sta temp1+2
lda &e+3
and #$00FF
ora temp1+2
sta temp1+2
ROTL4 temp1,2
ROTR4MOVE temp2,temp1,5
ROTR4MOVE temp3,&e,25
lda &e+1
sta temp3+2
lda &e-1
and #$FF00
sta temp3
lda &e+3
and #$00FF
ora temp3
sta temp3
ROTR4 temp3,1
lda temp1
eor temp2
eor temp3