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move sha2 state to a tuple

db4
Doug Coleman 2009-05-08 17:18:43 -05:00
parent 0fe5aaf5f8
commit 3292ceaf46
1 changed files with 22 additions and 14 deletions
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36
basis/checksums/sha2/sha2.factor
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@ -8,7 +8,7 @@ IN: checksums.sha2
<PRIVATE
SYMBOLS: H word-size block-size ;
SYMBOL: sha2
CONSTANT: a 0
CONSTANT: b 1
@ -89,7 +89,7 @@ CONSTANT: K-256
[ [ bitand ] [ bitor ] 2bi ] dip bitand bitor ;
: prepare-message-schedule ( seq -- w-seq )
word-size get <sliced-groups> [ be> ] map block-size get 0 pad-tail
sha2 get word-size>> <sliced-groups> [ be> ] map sha2 get block-size>> 0 pad-tail
16 64 [a,b) over '[ _ process-M-256 ] each ;
: slice3 ( n seq -- a b c )
@ -98,7 +98,7 @@ CONSTANT: K-256
: T1 ( W n H -- T1 )
[
[ swap nth ] keep
K-256 nth +
sha2 get K>> nth +
] dip
[ e swap slice3 ch w+ ]
[ e swap nth S1-256 w+ ]
@ -126,7 +126,7 @@ CONSTANT: K-256
[ T2 ]
[ update-H ] tri
] with each
] keep H get [ w+ ] 2map H set ;
] keep sha2 get H>> [ w+ ] 2map sha2 get (>>H) ;
: pad-initial-bytes ( string -- padded-string )
dup [
@ -141,12 +141,12 @@ CONSTANT: K-256
: byte-array>sha2 ( byte-array -- string )
pad-initial-bytes
block-size get <sliced-groups>
sha2 get block-size>> <sliced-groups>
[
prepare-message-schedule
block-size get H get clone process-chunk
sha2 get [ block-size>> ] [ H>> clone ] bi process-chunk
] each
H get 4 seq>byte-array ;
sha2 get H>> 4 seq>byte-array ;
PRIVATE>
@ -154,11 +154,19 @@ SINGLETON: sha-256
INSTANCE: sha-256 checksum
M: sha-256 checksum-bytes
drop [
initial-H-256 H set
4 word-size set
64 block-size set
byte-array>sha2
TUPLE: sha2-state K H word-size block-size ;
] with-scope ;
TUPLE: sha-256-state < sha2-state ;
: <sha-256-state> ( -- sha2-state )
sha-256-state new
K-256 >>K
initial-H-256 >>H
4 >>word-size
64 >>block-size ;
M: sha-256 checksum-bytes
drop
<sha-256-state> sha2 [
byte-array>sha2
] with-variable ;