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pvpgn-hash/perl/pvpgnhash.pl
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#!/usr/bin/perl | |
use strict; | |
# http://forum.sources.ru/index.php?showtopic=225504 | |
{ | |
no strict; | |
sub str2blks_pvpgn { my ($str) = @_; | |
$nblk = ((length($str) + 8) >> 6) + 1; | |
for($i=0; $i < $nblk * 16; $i++) {$blks[$i] = 0;} | |
for($i=0; $i < length($str); $i++) { | |
$blks[$i >> 2] |= ord(substr($str, $i, 1)) << ( ($i % 4) * 8); | |
} | |
return @blks; | |
} | |
sub safe_add { my ($x, $y) = @_; | |
$lsw = ($x & 0xFFFF) + ($y & 0xFFFF); | |
$msw = ($x >> 16) + ($y >> 16) + ($lsw >> 16); | |
return ($msw << 16) | ($lsw & 0xFFFF); | |
} | |
sub safe_not { my ( $num ) = @_; | |
$lsw = (~($num & 0xFFFF)) & 0xFFFF; | |
$msw = (~($num >> 16)) & 0xFFFF; | |
return ($msw << 16) | $lsw; | |
} | |
sub safe_rol { my ( $num, $amt ) = @_; | |
$leftmask = 0xffff | (0xffff << 16); | |
$leftmask <<= 32 - $amt; | |
$rightmask = 0xffff | (0xffff << 16); | |
$rightmask <<= $amt; | |
$rightmask = safe_not($rightmask); | |
$remains = $num & $leftmask; | |
$remains >>= 32 - $amt; | |
$remains &= $rightmask; | |
$res = ($num << $amt) | $remains; | |
return $res; | |
} | |
sub ft { my ($t, $b, $c, $d) = @_; | |
($t < 20) and return ($b & $c) | ((safe_not($b)) & $d); | |
($t < 40) and return $d ^ $c ^ $b; | |
($t < 60) and return ($c & $b) | ($d & $c) | ($d & $b); | |
return $d ^ $c ^ $b; | |
} | |
sub kt { my ($t) = @_; | |
if ($t < 20) { | |
return 0x5a82 << 16 | 0x7999; | |
} elsif ($t < 40) { | |
return 0x6ed9 << 16 | 0xeba1; | |
} elsif ($t < 60) { | |
return 0x8f1b << 16 | 0xbcdc; | |
} else { | |
return 0xca62 << 16 | 0xc1d6; | |
} | |
} | |
sub pvpgn_hash { my ($str) = @_; | |
@x = str2blks_pvpgn($str); | |
$a = 0x6745 << 16 | 0x2301; | |
$b = 0xefcd << 16 | 0xab89; | |
$c = 0x98ba << 16 | 0xdcfe; | |
$d = 0x1032 << 16 | 0x5476; | |
$e = 0xc3d2 << 16 | 0xe1f0; | |
for($i = 0; $i < scalar(@x); $i += 16) { | |
$olda = $a; | |
$oldb = $b; | |
$oldc = $c; | |
$oldd = $d; | |
$olde = $e; | |
for($j = 0; $j < 16; $j++) { | |
$w[$j] = $x[$i+$j]; | |
} | |
for($j = 0; $j < 64; $j++) { | |
$ww = $w[$j] ^ $w[$j+8] ^ $w[$j+2] ^ $w[$j+13]; | |
$w[$j+16] = 1 << ($ww%32); | |
} | |
for($j = 0; $j < 80; $j++) { | |
if ($j<20) | |
{ | |
$t = safe_add(safe_add(safe_rol($a, 5), ft($j, $b, $c, $d)), safe_add(safe_add($e, $w[$j]), kt($j))); | |
} | |
else | |
{ | |
$t = safe_add(safe_add(safe_rol($t, 5), ft($j, $b, $c, $d)), safe_add(safe_add($e, $w[$j]), kt($j))); | |
} | |
$e = $d; | |
$d = $c; | |
$c = safe_rol($b, 30); | |
$b = $a; | |
$a = $t; | |
} | |
$a = safe_add($t, $olda); | |
$b = safe_add($b, $oldb); | |
$c = safe_add($c, $oldc); | |
$d = safe_add($d, $oldd); | |
$e = safe_add($e, $olde); | |
} | |
return sprintf("%08x%08x%08x%08x%08x",$a,$b,$c,$d,$e); | |
} | |
} |