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294 lines
6.8 KiB
Perl
294 lines
6.8 KiB
Perl
#!/usr/local/bin/perl
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#
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# This is an implementation of part of the DES specification. According
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# to the code this is ported from, this code does NOT enable 2-way
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# encryption and is, hence, not a cypher and does not appear to come
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# under any export restrictions on such.
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#
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package Authen::NTLM::DES;
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use vars qw($VERSION @ISA @EXPORT);
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require Exporter;
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$VERSION = "1.02";
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@ISA = qw(Exporter);
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@EXPORT = qw(E_P16 E_P24);
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my ($loop, $loop2);
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$loop = 0;
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$loop2 = 0;
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my $perm1 = [57, 49, 41, 33, 25, 17, 9,
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1, 58, 50, 42, 34, 26, 18,
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10, 2, 59, 51, 43, 35, 27,
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19, 11, 3, 60, 52, 44, 36,
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63, 55, 47, 39, 31, 23, 15,
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7, 62, 54, 46, 38, 30, 22,
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14, 6, 61, 53, 45, 37, 29,
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21, 13, 5, 28, 20, 12, 4];
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my $perm2 = [14, 17, 11, 24, 1, 5,
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3, 28, 15, 6, 21, 10,
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23, 19, 12, 4, 26, 8,
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16, 7, 27, 20, 13, 2,
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41, 52, 31, 37, 47, 55,
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30, 40, 51, 45, 33, 48,
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44, 49, 39, 56, 34, 53,
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46, 42, 50, 36, 29, 32];
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my $perm3 = [58, 50, 42, 34, 26, 18, 10, 2,
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60, 52, 44, 36, 28, 20, 12, 4,
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62, 54, 46, 38, 30, 22, 14, 6,
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64, 56, 48, 40, 32, 24, 16, 8,
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57, 49, 41, 33, 25, 17, 9, 1,
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59, 51, 43, 35, 27, 19, 11, 3,
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61, 53, 45, 37, 29, 21, 13, 5,
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63, 55, 47, 39, 31, 23, 15, 7];
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my $perm4 = [32, 1, 2, 3, 4, 5,
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4, 5, 6, 7, 8, 9,
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8, 9, 10, 11, 12, 13,
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12, 13, 14, 15, 16, 17,
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16, 17, 18, 19, 20, 21,
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20, 21, 22, 23, 24, 25,
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24, 25, 26, 27, 28, 29,
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28, 29, 30, 31, 32, 1];
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my $perm5 = [16, 7, 20, 21, 29, 12, 28, 17,
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1, 15, 23, 26, 5, 18, 31, 10,
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2, 8, 24, 14, 32, 27, 3, 9,
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19, 13, 30, 6, 22, 11, 4, 25];
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my $perm6 = [40, 8, 48, 16, 56, 24, 64, 32,
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39, 7, 47, 15, 55, 23, 63, 31,
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38, 6, 46, 14, 54, 22, 62, 30,
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37, 5, 45, 13, 53, 21, 61, 29,
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36, 4, 44, 12, 52, 20, 60, 28,
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35, 3, 43, 11, 51, 19, 59, 27,
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34, 2, 42, 10, 50, 18, 58, 26,
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33, 1, 41, 9, 49, 17, 57, 25];
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my $sc = [1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1];
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my $sbox = [
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[
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[14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7],
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[0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8],
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[4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0],
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[15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13]
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],
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[
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[15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10],
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[3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5],
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[0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15],
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[13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9]
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],
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[
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[10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8],
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[13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1],
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[13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7],
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[1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12]
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],
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[
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[7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15],
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[13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9],
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[10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4],
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[3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14]
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],
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[
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[2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9],
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[14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6],
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[4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14],
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[11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3]
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],
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[
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[12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11],
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[10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8],
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[9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6],
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[4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13]
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],
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[
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[4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1],
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[13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6],
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[1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2],
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[6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12]
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],
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[
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[13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7],
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[1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2],
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[7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8],
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[2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11]
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]
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];
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sub E_P16
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{
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my ($p14) = @_;
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my $sp8 = [0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25];
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my $p7 = substr($p14, 0, 7);
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my $p16 = smbhash($sp8, $p7);
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$p7 = substr($p14, 7, 7);
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$p16 .= smbhash($sp8, $p7);
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return $p16;
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}
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sub E_P24
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{
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my ($p21, $c8_str) = @_;
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my @c8 = map {ord($_)} split(//, $c8_str);
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my $p24 = smbhash(\@c8, substr($p21, 0, 7));
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$p24 .= smbhash(\@c8, substr($p21, 7, 7));
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$p24 .= smbhash(\@c8, substr($p21, 14, 7));
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}
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sub permute
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{
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my ($out, $in, $p, $n) = @_;
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my $i;
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foreach $i (0..($n-1))
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{
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$out->[$i] = $in->[$p->[$i]-1];
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}
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}
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sub lshift
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{
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my ($d, $count, $n) = @_;
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my (@out, $i);
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foreach $i (0..($n-1))
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{
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$out[$i] = $d->[($i+$count)%$n];
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}
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foreach $i (0..($n-1))
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{
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$d->[$i] = $out[$i];
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}
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}
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sub xor
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{
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my ($out, $in1, $in2, $n) = @_;
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my $i;
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foreach $i (0..($n-1))
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{
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$out->[$i] = $in1->[$i]^$in2->[$i];
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}
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}
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sub dohash
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{
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my ($out, $in, $key) = @_;
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my ($i, $j, $k, @pk1, @c, @d, @cd,
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@ki, @pd1, @l, @r, @rl);
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&permute(\@pk1, $key, $perm1, 56);
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foreach $i (0..27)
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{
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$c[$i] = $pk1[$i];
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$d[$i] = $pk1[$i+28];
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}
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foreach $i (0..15)
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{
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my @array;
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&lshift(\@c, $sc->[$i], 28);
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&lshift(\@d, $sc->[$i], 28);
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@cd = (@c, @d);
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&permute(\@array, \@cd, $perm2, 48);
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$ki[$i] = \@array;
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}
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&permute(\@pd1, $in, $perm3, 64);
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foreach $j (0..31)
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{
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$l[$j] = $pd1[$j];
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$r[$j] = $pd1[$j+32];
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}
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foreach $i (0..15)
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{
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local (@er, @erk, @b, @cb, @pcb, @r2);
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permute(\@er, \@r, $perm4, 48);
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&xor(\@erk, \@er, $ki[$i], 48);
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foreach $j (0..7)
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{
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foreach $k (0..5)
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{
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$b[$j][$k] = $erk[$j*6+$k];
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}
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}
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foreach $j (0..7)
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{
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local ($m, $n);
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$m = ($b[$j][0]<<1) | $b[$j][5];
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$n = ($b[$j][1]<<3) | ($b[$j][2]<<2) | ($b[$j][3]<<1) | $b[$j][4];
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foreach $k (0..3)
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{
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$b[$j][$k] = ($sbox->[$j][$m][$n] & (1<<(3-$k)))? 1: 0;
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}
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}
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foreach $j (0..7)
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{
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foreach $k (0..3)
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{
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$cb[$j*4+$k] = $b[$j][$k];
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}
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}
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&permute(\@pcb, \@cb, $perm5, 32);
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&xor(\@r2, \@l, \@pcb, 32);
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foreach $j (0..31)
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{
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$l[$j] = $r[$j];
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$r[$j] = $r2[$j];
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}
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}
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@rl = (@r, @l);
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&permute($out, \@rl, $perm6, 64);
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}
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sub str_to_key
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{
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my ($str) = @_;
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my $i;
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my @key;
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my $out;
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my @str = map {ord($_)} split(//, $str);
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$key[0] = $str[0]>>1;
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$key[1] = (($str[0]&0x01)<<6) | ($str[1]>>2);
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$key[2] = (($str[1]&0x03)<<5) | ($str[2]>>3);
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$key[3] = (($str[2]&0x07)<<4) | ($str[3]>>4);
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$key[4] = (($str[3]&0x0f)<<3) | ($str[4]>>5);
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$key[5] = (($str[4]&0x1f)<<2) | ($str[5]>>6);
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$key[6] = (($str[5]&0x3f)<<1) | ($str[6]>>7);
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$key[7] = $str[6]&0x7f;
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foreach $i (0..7)
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{
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$key[$i] = 0xff&($key[$i]<<1);
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}
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return \@key;
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}
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sub smbhash
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{
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my ($in, $key) = @_;
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my $key2 = &str_to_key($key);
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my ($i, $div, $mod, @in, @outb, @inb, @keyb, @out);
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foreach $i (0..63)
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{
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$div = int($i/8); $mod = $i%8;
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$inb[$i] = ($in->[$div] & (1<<(7-($mod))))? 1: 0;
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$keyb[$i] = ($key2->[$div] & (1<<(7-($mod))))? 1: 0;
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$outb[$i] = 0;
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}
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&dohash(\@outb, \@inb, \@keyb);
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foreach $i (0..7)
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{
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$out[$i] = 0;
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}
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foreach $i (0..63)
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{
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$out[int($i/8)] |= (1<<(7-($i%8))) if ($outb[$i]);
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}
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my $out = pack("C8", @out);
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return $out;
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}
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1;
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