diff options
Diffstat (limited to 'crypto/des/doIP')
| -rw-r--r-- | crypto/des/doIP | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/crypto/des/doIP b/crypto/des/doIP new file mode 100644 index 0000000000..18cf231303 --- /dev/null +++ b/crypto/des/doIP @@ -0,0 +1,46 @@ +#!/usr/local/bin/perl + +@l=( + 0, 1, 2, 3, 4, 5, 6, 7, + 8, 9,10,11,12,13,14,15, + 16,17,18,19,20,21,22,23, + 24,25,26,27,28,29,30,31 + ); +@r=( + 32,33,34,35,36,37,38,39, + 40,41,42,43,44,45,46,47, + 48,49,50,51,52,53,54,55, + 56,57,58,59,60,61,62,63 + ); + +require 'shifts.pl'; + +sub PERM_OP + { + local(*a,*b,*t,$n,$m)=@_; + + @z=&shift(*a,-$n); + @z=&xor(*b,*z); + @z=&and(*z,$m); + @b=&xor(*b,*z); + @z=&shift(*z,$n); + @a=&xor(*a,*z); + } + + +@L=@l; +@R=@r; +&PERM_OP(*R,*L,*T,4,0x0f0f0f0f); +&PERM_OP(*L,*R,*T,16,0x0000ffff); +&PERM_OP(*R,*L,*T,2,0x33333333); +&PERM_OP(*L,*R,*T,8,0x00ff00ff); +&PERM_OP(*R,*L,*T,1,0x55555555); + &printit(@L); + &printit(@R); +&PERM_OP(*R,*L,*T,1,0x55555555); +&PERM_OP(*L,*R,*T,8,0x00ff00ff); +&PERM_OP(*R,*L,*T,2,0x33333333); +&PERM_OP(*L,*R,*T,16,0x0000ffff); +&PERM_OP(*R,*L,*T,4,0x0f0f0f0f); + &printit(@L); + &printit(@R); |