1 ! Copyright (C) 2006, 2008 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: kernel io io.binary io.files io.streams.byte-array math
4 math.functions math.parser namespaces splitting grouping strings
5 sequences byte-arrays locals sequences.private macros fry
6 io.encodings.binary math.bitwise checksums accessors
7 checksums.common checksums.stream combinators combinators.smart ;
11 INSTANCE: md5 stream-checksum
13 TUPLE: md5-state < checksum-state state old-state ;
15 : <md5-state> ( -- md5-state )
16 64 md5-state new-checksum-state
17 { HEX: 67452301 HEX: efcdab89 HEX: 98badcfe HEX: 10325476 }
18 [ clone >>state ] [ >>old-state ] bi ;
22 : v-w+ ( v1 v2 -- v3 ) [ w+ ] 2map ;
24 : update-md5-state ( md5-state -- )
25 [ state>> ] [ old-state>> v-w+ dup clone ] [ ] tri
26 [ (>>old-state) ] [ (>>state) ] bi ; inline
29 sin abs 32 2^ * >integer ; inline
31 :: F ( X Y Z -- FXYZ )
32 #! F(X,Y,Z) = XY v not(X) Z
33 X Y bitand X bitnot Z bitand bitor ; inline
35 :: G ( X Y Z -- GXYZ )
36 #! G(X,Y,Z) = XZ v Y not(Z)
37 X Z bitand Y Z bitnot bitand bitor ; inline
40 #! H(X,Y,Z) = X xor Y xor Z
41 bitxor bitxor ; inline
43 :: I ( X Y Z -- IXYZ )
44 #! I(X,Y,Z) = Y xor (X v not(Z))
45 Z bitnot X bitor Y bitxor ; inline
69 :: (ABCD) ( x V a b c d k s i quot -- )
70 #! a = b + ((a + F(b,c,d) + X[k] + T[i]) <<< s)
74 d V nth-unsafe quot call w+
81 MACRO: with-md5-round ( ops quot -- )
82 '[ [ _ (ABCD) ] compose ] map '[ _ 2cleave ] ;
84 : (process-md5-block-F) ( block v -- )
100 [ c d a b 14 S13 15 ]
101 [ b c d a 15 S14 16 ]
102 } [ F ] with-md5-round ; inline
104 : (process-md5-block-G) ( block v -- )
108 [ c d a b 11 S23 19 ]
111 [ d a b c 10 S22 22 ]
112 [ c d a b 15 S23 23 ]
115 [ d a b c 14 S22 26 ]
118 [ a b c d 13 S21 29 ]
121 [ b c d a 12 S24 32 ]
122 } [ G ] with-md5-round ; inline
124 : (process-md5-block-H) ( block v -- )
128 [ c d a b 11 S33 35 ]
129 [ b c d a 14 S34 36 ]
133 [ b c d a 10 S34 40 ]
134 [ a b c d 13 S31 41 ]
139 [ d a b c 12 S32 46 ]
140 [ c d a b 15 S33 47 ]
142 } [ H ] with-md5-round ; inline
144 : (process-md5-block-I) ( block v -- )
148 [ c d a b 14 S43 51 ]
150 [ a b c d 12 S41 53 ]
152 [ c d a b 10 S43 55 ]
155 [ d a b c 15 S42 58 ]
157 [ b c d a 13 S44 60 ]
159 [ d a b c 11 S42 62 ]
162 } [ I ] with-md5-round ; inline
164 M: md5-state checksum-block ( block state -- )
166 [ 4 <groups> [ le> ] map ] [ state>> ] bi* {
167 [ (process-md5-block-F) ]
168 [ (process-md5-block-G) ]
169 [ (process-md5-block-H) ]
170 [ (process-md5-block-I) ]
176 : md5-state>checksum ( md5-state -- bytes )
177 state>> [ 4 >le ] map B{ } concat-as ;
179 M: md5-state get-checksum ( md5-state -- bytes )
180 clone [ bytes>> f ] [ bytes-read>> pad-last-block ] [ ] tri
181 [ [ checksum-block ] curry each ] [ md5-state>checksum ] bi ;