! Copyright (C) 2013 Fred Alger
! See http://factorcode.org/license.txt for BSD license.
-USING: arrays columns combinators generalizations grouping
-kernel locals math math.bitwise prettyprint sequences
+USING: combinators grouping kernel math math.bitwise
+prettyprint sequences
sequences.private ;
IN: crypto.aes.utils
: gb0 ( a -- a0 ) 0xff bitand ; inline
: gb2 ( a -- a2 ) -16 shift gb0 ; inline
: gb3 ( a -- a3 ) -24 shift gb0 ; inline
-#! pack 4 bytes into 32-bit unsigned int
-#! a3 is msb
+! pack 4 bytes into 32-bit unsigned int
+! a3 is msb
: >ui32 ( a0 a1 a2 a3 -- a )
[ 8 shift ] [ 16 shift ] [ 24 shift ] tri*
bitor bitor bitor 32 bits ;
-#! inverse of ui32
+! inverse of ui32
: ui32> ( word -- a0 a1 a2 a3 )
[ gb0 ] keep [ gb1 ] keep [ gb2 ] keep gb3 ; inline
[ gb3 ] keep [ gb2 ] keep [ gb1 ] keep gb0 ; inline
: bytes>words ( seq -- seq )
- 4 <sliced-groups> [ <reversed> first4 >ui32 ] V{ } map-as ;
+ 4 <groups> [ <reversed> first4 >ui32 ] V{ } map-as ;
: .t ( seq -- )
reverse
} cleave .h .h .h .h ;
-#! given 4 columns, output the first diagonal, i.e.
-#! C[0,0] C[1,1] C[2,2] C[3,3]
+! given 4 columns, output the first diagonal, i.e.
+! C[0,0] C[1,1] C[2,2] C[3,3]
: first-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 )
{ [ gb3 ] [ gb2 ] [ gb1 ] [ gb0 ] } spread ;
-: (4rot) ( c0 c1 c2 c3 -- c1 c2 c3 c0 ) 4 nrot ; inline
-: second-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) (4rot) first-diag ;
-: third-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) (4rot) second-diag ;
-: fourth-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) (4rot) third-diag ;
+: second-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) roll first-diag ;
+: third-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) roll second-diag ;
+: fourth-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) roll third-diag ;
-#! given 4 columns, output the first reverse diagonal, i.e.
-#! C[0,0] C[3,1] C[2,2] C[1,3]
-:: (-rev) ( c0 c1 c2 c3 -- c0 c3 c2 c1 ) c0 c3 c2 c1 ; inline
-: -first-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) (-rev) first-diag ;
-: -second-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) (-rev) (4rot) first-diag ;
-: -third-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) (-rev) (4rot) second-diag ;
-: -fourth-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) (-rev) (4rot) third-diag ;
+! given 4 columns, output the first reverse diagonal, i.e.
+! C[0,0] C[3,1] C[2,2] C[1,3]
+: -first-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) spin first-diag ;
+: -second-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) spin roll first-diag ;
+: -third-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) spin roll second-diag ;
+: -fourth-diag ( c0 c1 c2 c3 -- a0 a1 a2 a3 ) spin roll third-diag ;
:: set-first4-unsafe ( seq a0 a1 a2 a3 -- )
a0 0 seq set-nth-unsafe
: 4th-from-end ( seq -- el )
[ length 4 - ] keep nth ;
-