dopc1

Netscape公司提供的安全套接字层

#!/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);
    }

sub HPERM_OP2
    {
    local(*a,*t,$n,$m)=@_;
    local(@x,@y,$i);

    @z=&shift(*a,16-$n);
    @z=&xor(*a,*z);
    @z=&and(*z,$m);
    @a=&xor(*a,*z);
    @z=&shift(*z,$n-16);
    @a=&xor(*a,*z);
    }

sub HPERM_OP
        {
        local(*a,*t,$n,$m)=@_;
        local(@x,@y,$i);

        for ($i=0; $i<16; $i++)
                {
                $x[$i]=$a[$i];
                $y[$i]=$a[16+$i];
                }
        @z=&shift(*x,-$n);
        @z=&xor(*y,*z);
        @z=&and(*z,$m);
        @y=&xor(*y,*z);
        @z=&shift(*z,$n);
        @x=&xor(*x,*z);
        for ($i=0; $i<16; $i++)
                {
                $a[$i]=$x[$i];
                $a[16+$i]=$y[$i];
                }
        }

@L=@l;
@R=@r;

    print "---\n"; &printit(@R);
&PERM_OP(*R,*L,*T,4,0x0f0f0f0f);
    print "---\n"; &printit(@R);
&HPERM_OP2(*L,*T,-2,0xcccc0000);
&HPERM_OP2(*R,*T,-2,0xcccc0000);
    print "---\n"; &printit(@R);
&PERM_OP(*R,*L,*T,1,0x55555555);
    print "---\n"; &printit(@R);
&PERM_OP(*L,*R,*T,8,0x00ff00ff);
    print "---\n"; &printit(@R);
&PERM_OP(*R,*L,*T,1,0x55555555);
    print "---\n"; &printit(@R);
#   &printit(@L);
    &printit(@R);
print <<"EOF";
==============================
63  55  47  39  31  23  15   7  
62  54  46  38  30  22  14   6  
61  53  45  37  29  21  13   5  
60  52  44  36  --  --  --  --  

57  49  41  33  25  17   9   1  
58  50  42  34  26  18  10   2  
59  51  43  35  27  19  11   3  
28  20  12   4  --  --  --  --  
EOF
exit(1);
@A=&and(*R,0x000000ff);
@A=&shift(*A,16);
@B=&and(*R,0x0000ff00);
@C=&and(*R,0x00ff0000);
@C=&shift(*C,-16);
@D=&and(*L,0xf0000000);
@D=&shift(*D,-4);
@A=&or(*A,*B);
@B=&or(*D,*C);
@R=&or(*A,*B);
@L=&and(*L,0x0fffffff);

    &printit(@L);
    &printit(@R);