! Copyright (C) 2006, 2008 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
-USING: kernel io io.binary io.files io.streams.byte-array math
-math.functions math.parser namespaces splitting grouping strings
-sequences byte-arrays locals sequences.private macros fry
-io.encodings.binary math.bitwise checksums
-checksums.common checksums.stream combinators ;
+USING: accessors alien.c-types alien.data byte-arrays checksums
+checksums.common combinators grouping hints kernel
+kernel.private literals math math.bitwise
+math.functions sequences sequences.private specialized-arrays ;
+SPECIALIZED-ARRAY: uint
IN: checksums.md5
-! See http://www.faqs.org/rfcs/rfc1321.html
+SINGLETON: md5
-<PRIVATE
+INSTANCE: md5 block-checksum
-SYMBOLS: a b c d old-a old-b old-c old-d ;
+TUPLE: md5-state < block-checksum-state
+{ state uint-array }
+{ old-state uint-array } ;
-: T ( N -- Y )
- sin abs 4294967296 * >integer ; foldable
+: <md5-state> ( -- md5 )
+ md5-state new-checksum-state
+ 64 >>block-size
+ uint-array{ 0x67452301 0xefcdab89 0x98badcfe 0x10325476 }
+ [ clone >>state ] [ >>old-state ] bi ;
-: initialize-md5 ( -- )
- 0 bytes-read set
- HEX: 67452301 dup a set old-a set
- HEX: efcdab89 dup b set old-b set
- HEX: 98badcfe dup c set old-c set
- HEX: 10325476 dup d set old-d set ;
+M: md5 initialize-checksum-state drop <md5-state> ;
-: update-md ( -- )
- old-a a update-old-new
- old-b b update-old-new
- old-c c update-old-new
- old-d d update-old-new ;
+<PRIVATE
-:: (ABCD) ( x a b c d k s i func -- )
- #! a = b + ((a + F(b,c,d) + X[k] + T[i]) <<< s)
- a [
- b get c get d get func call w+
- k x nth-unsafe w+
- i T w+
- s bitroll-32
- b get w+
- ] change ; inline
+: update-md5 ( md5 -- )
+ [ state>> ] [ old-state>> [ w+ ] 2map dup clone ] [ ] tri
+ [ old-state<< ] [ state<< ] bi ; inline
+
+CONSTANT: T $[
+ 80 <iota> [ sin abs 32 2^ * >integer ] uint-array{ } map-as
+]
-: F ( X Y Z -- FXYZ )
- #! F(X,Y,Z) = XY v not(X) Z
- pick bitnot bitand [ bitand ] [ bitor ] bi* ;
+:: F ( X Y Z -- FXYZ )
+ ! F(X,Y,Z) = XY v not(X) Z
+ X Y bitand X bitnot Z bitand bitor ; inline
-: G ( X Y Z -- GXYZ )
- #! G(X,Y,Z) = XZ v Y not(Z)
- dup bitnot rot bitand [ bitand ] [ bitor ] bi* ;
+:: G ( X Y Z -- GXYZ )
+ ! G(X,Y,Z) = XZ v Y not(Z)
+ X Z bitand Y Z bitnot bitand bitor ; inline
: H ( X Y Z -- HXYZ )
- #! H(X,Y,Z) = X xor Y xor Z
- bitxor bitxor ;
+ ! H(X,Y,Z) = X xor Y xor Z
+ bitxor bitxor ; inline
-: I ( X Y Z -- IXYZ )
- #! I(X,Y,Z) = Y xor (X v not(Z))
- rot swap bitnot bitor bitxor ;
+:: I ( X Y Z -- IXYZ )
+ ! I(X,Y,Z) = Y xor (X v not(Z))
+ Z bitnot X bitor Y bitxor ; inline
CONSTANT: S11 7
CONSTANT: S12 12
CONSTANT: S43 15
CONSTANT: S44 21
-MACRO: with-md5-round ( ops func -- )
- '[ [ _ (ABCD) ] compose ] map '[ _ cleave ] ;
+CONSTANT: a 0
+CONSTANT: b 1
+CONSTANT: c 2
+CONSTANT: d 3
+
+:: (ABCD) ( x state a b c d k s i quot -- )
+ ! a = b + ((a + F(b,c,d) + X[k] + T[i]) <<< s)
+ a state [
+ b state nth-unsafe
+ c state nth-unsafe
+ d state nth-unsafe quot call w+
+ k x nth-unsafe w+
+ i T nth-unsafe w+
+ s bitroll-32
+ b state nth-unsafe w+
+ ] change-nth-unsafe ; inline
-: (process-md5-block-F) ( block -- )
- {
+MACRO: with-md5-round ( ops quot -- quot )
+ '[ [ _ (ABCD) ] compose ] map '[ _ 2cleave ] ;
+
+: (process-md5-block-F) ( block state -- )
+ { uint-array uint-array } declare {
[ a b c d 0 S11 1 ]
[ d a b c 1 S12 2 ]
[ c d a b 2 S13 3 ]
[ b c d a 15 S14 16 ]
} [ F ] with-md5-round ;
-: (process-md5-block-G) ( block -- )
- {
+: (process-md5-block-G) ( block state -- )
+ { uint-array uint-array } declare {
[ a b c d 1 S21 17 ]
[ d a b c 6 S22 18 ]
[ c d a b 11 S23 19 ]
[ b c d a 12 S24 32 ]
} [ G ] with-md5-round ;
-: (process-md5-block-H) ( block -- )
- {
+: (process-md5-block-H) ( block state -- )
+ { uint-array uint-array } declare {
[ a b c d 5 S31 33 ]
[ d a b c 8 S32 34 ]
[ c d a b 11 S33 35 ]
[ b c d a 2 S34 48 ]
} [ H ] with-md5-round ;
-: (process-md5-block-I) ( block -- )
- {
+: (process-md5-block-I) ( block state -- )
+ { uint-array uint-array } declare {
[ a b c d 0 S41 49 ]
[ d a b c 7 S42 50 ]
[ c d a b 14 S43 51 ]
[ b c d a 9 S44 64 ]
} [ I ] with-md5-round ;
-: (process-md5-block) ( block -- )
- 4 <groups> [ le> ] map {
- [ (process-md5-block-F) ]
- [ (process-md5-block-G) ]
- [ (process-md5-block-H) ]
- [ (process-md5-block-I) ]
- } cleave
-
- update-md ;
-
-: process-md5-block ( str -- )
- dup length [ bytes-read [ + ] change ] keep 64 = [
- (process-md5-block)
+: byte-array>le ( byte-array -- byte-array )
+ little-endian? [
+ dup 4 <groups> [
+ [ [ 1 2 ] dip exchange-unsafe ]
+ [ [ 0 3 ] dip exchange-unsafe ] bi
+ ] each
+ ] unless ;
+
+HINTS: byte-array>le byte-array ;
+
+M: md5-state checksum-block
+ [
+ [ byte-array>le uint cast-array ] [ state>> ] bi* {
+ [ (process-md5-block-F) ]
+ [ (process-md5-block-G) ]
+ [ (process-md5-block-H) ]
+ [ (process-md5-block-I) ]
+ } 2cleave
] [
- f bytes-read get pad-last-block
- [ (process-md5-block) ] each
- ] if ;
-
-: stream>md5 ( -- )
- 64 read [ process-md5-block ] keep
- length 64 = [ stream>md5 ] when ;
+ update-md5
+ ] bi ;
-: get-md5 ( -- str )
- [ a b c d ] [ get 4 >le ] map concat >byte-array ;
+: md5>checksum ( md5 -- bytes )
+ state>> underlying>> byte-array>le ;
-PRIVATE>
+M: md5-state clone
+ call-next-method
+ [ clone ] change-state
+ [ clone ] change-old-state ;
-SINGLETON: md5
-
-INSTANCE: md5 stream-checksum
+M: md5-state get-checksum
+ clone
+ [ bytes>> f ] [ bytes-read>> pad-last-block ] [ ] tri
+ [ [ checksum-block ] curry each ] [ md5>checksum ] bi ;
-M: md5 checksum-stream ( stream -- byte-array )
- drop [ initialize-md5 stream>md5 get-md5 ] with-input-stream ;
+PRIVATE>
projects / factor.git / blobdiff