forked from friendica/friendica-addons
404 lines
8.2 KiB
PHP
404 lines
8.2 KiB
PHP
|
<?php
|
||
|
|
/** @package php-gpg::GPG */
|
||
|
|
|
||
|
|
/** assign globals */
|
||
|
|
global $bs;
|
||
|
|
global $bx2;
|
||
|
|
global $bm;
|
||
|
|
global $bx;
|
||
|
|
global $bd;
|
||
|
|
global $bdm;
|
||
|
|
|
||
|
|
$bs = 28;
|
||
|
|
$bx2 = 1 << $bs;
|
||
|
|
$bm = $bx2 - 1;
|
||
|
|
$bx = $bx2 >> 1;
|
||
|
|
$bd = $bs >> 1;
|
||
|
|
$bdm = (1 << $bd) - 1;
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function mpi2b($s)
|
||
|
|
{
|
||
|
|
global $bs;
|
||
|
|
global $bx2;
|
||
|
|
global $bm;
|
||
|
|
global $bx;
|
||
|
|
global $bd;
|
||
|
|
global $bdm;
|
||
|
|
|
||
|
|
$bn = 1;
|
||
|
|
$r = array(0);
|
||
|
|
$rn = 0;
|
||
|
|
$sb = 256;
|
||
|
|
$c = 0;
|
||
|
|
$sn = strlen($s);
|
||
|
|
if($sn < 2) {
|
||
|
|
echo("string too short, not a MPI");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
$len = ($sn - 2) * 8;
|
||
|
|
$bits = ord($s[0]) * 256 + ord($s[1]);
|
||
|
|
if ($bits > $len || $bits < $len - 8) {
|
||
|
|
echo("not a MPI, bits = $bits, len = $len");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ($n = 0; $n < $len; $n++) {
|
||
|
|
if (($sb <<= 1) > 255) {
|
||
|
|
$sb = 1; $c = ord($s[--$sn]);
|
||
|
|
}
|
||
|
|
if ($bn > $bm) {
|
||
|
|
$bn = 1;
|
||
|
|
$r[++$rn]=0;
|
||
|
|
}
|
||
|
|
if ($c & $sb) $r[$rn] |= $bn;
|
||
|
|
$bn <<= 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $r;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function b2mpi($b)
|
||
|
|
{
|
||
|
|
global $bs;
|
||
|
|
global $bx2;
|
||
|
|
global $bm;
|
||
|
|
global $bx;
|
||
|
|
global $bd;
|
||
|
|
global $bdm;
|
||
|
|
|
||
|
|
$bn = 1;
|
||
|
|
$bc = 0;
|
||
|
|
$r = array(0);
|
||
|
|
$rb = 1;
|
||
|
|
$rn = 0;
|
||
|
|
$bits = count($b) * $bs;
|
||
|
|
$n = 0;
|
||
|
|
$rr = "";
|
||
|
|
|
||
|
|
for ($n = 0; $n < $bits; $n++) {
|
||
|
|
if ($b[$bc] & $bn) $r[$rn] |= $rb;
|
||
|
|
if(($rb <<= 1) > 255) {
|
||
|
|
$rb = 1; $r[++$rn]=0;
|
||
|
|
}
|
||
|
|
if (($bn <<= 1) > $bm) {
|
||
|
|
$bn=1; $bc++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
while ($rn && $r[$rn]==0) $rn--;
|
||
|
|
|
||
|
|
$bn=256;
|
||
|
|
for($bits = 8; $bits > 0; $bits--) if ($r[$rn] & ($bn >>= 1)) break;
|
||
|
|
$bits += $rn * 8;
|
||
|
|
|
||
|
|
$rr .= chr($bits / 256 ) . chr($bits % 256);
|
||
|
|
if ($bits) for($n = $rn; $n >= 0; $n--) $rr .= chr($r[$n]);
|
||
|
|
|
||
|
|
return $rr;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function bmodexp($xx, $y, $m) {
|
||
|
|
global $bs;
|
||
|
|
global $bx2;
|
||
|
|
global $bm;
|
||
|
|
global $bx;
|
||
|
|
global $bd;
|
||
|
|
global $bdm;
|
||
|
|
|
||
|
|
$r = array(1);
|
||
|
|
$an = 0;
|
||
|
|
$a = 0;
|
||
|
|
$x = array_merge((array)$xx);
|
||
|
|
$n = count($m) * 2;
|
||
|
|
$mu = array_fill(0, $n + 1, 0);
|
||
|
|
|
||
|
|
$mu[$n--] = 1;
|
||
|
|
for(; $n >= 0; $n--) $mu[$n] = 0;
|
||
|
|
$dd = new bdiv($mu, $m);
|
||
|
|
$mu = $dd->q;
|
||
|
|
|
||
|
|
for($n = 0; $n < count($y); $n++) {
|
||
|
|
for ($a = 1, $an = 0; $an < $bs; $an++, $a <<= 1) {
|
||
|
|
if ($y[$n] & $a) $r = bmod2(bmul($r, $x), $m, $mu);
|
||
|
|
$x = bmod2(bmul($x, $x), $m, $mu);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $r;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function simplemod($i, $m) // returns the mod where m < 2^bd
|
||
|
|
{
|
||
|
|
$c = 0;
|
||
|
|
$v = 0;
|
||
|
|
for ($n = count($i) - 1; $n >= 0; $n--)
|
||
|
|
{
|
||
|
|
$v = $i[$n];
|
||
|
|
$c = (($v >> $bd) + ($c << $bd)) % $m;
|
||
|
|
$c = (($v & $bdm) + ($c << $bd)) % $m;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $c;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function bmod($p, $m) // binary modulo
|
||
|
|
{
|
||
|
|
global $bdm;
|
||
|
|
|
||
|
|
if (count($m) == 1) {
|
||
|
|
if(count($p) == 1) return array($p[0] % $m[0]);
|
||
|
|
if($m[0] < $bdm) return array(simplemod($p, $m[0]));
|
||
|
|
}
|
||
|
|
|
||
|
|
$r = new bdiv($p, $m);
|
||
|
|
return $r->mod;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function bmod2($x, $m, $mu) {
|
||
|
|
$xl = count($x) - (count($m) << 1);
|
||
|
|
if ($xl > 0) return bmod2(array_concat(array_slice($x, 0, $xl), bmod2(array_slice($x, $xl), $m, $mu)), $m, $mu);
|
||
|
|
|
||
|
|
$ml1 = count($m) + 1;
|
||
|
|
$ml2 = count($m) - 1;
|
||
|
|
$rr = 0;
|
||
|
|
|
||
|
|
$q3 = array_slice(bmul(array_slice($x, $ml2), $mu), $ml1);
|
||
|
|
$r1 = array_slice($x, 0, $ml1);
|
||
|
|
$r2 = array_slice(bmul($q3, $m), 0, $ml1);
|
||
|
|
|
||
|
|
$r = bsub($r1, $r2);
|
||
|
|
if (count($r) == 0) {
|
||
|
|
$r1[$ml1] = 1;
|
||
|
|
$r = bsub($r1, $r2);
|
||
|
|
}
|
||
|
|
for ($n = 0;; $n++) {
|
||
|
|
$rr = bsub($r, $m);
|
||
|
|
if(count($rr) == 0) break;
|
||
|
|
$r = $rr;
|
||
|
|
if($n >= 3) return bmod2($r, $m, $mu);
|
||
|
|
}
|
||
|
|
|
||
|
|
return $r;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function toppart($x, $start, $len) {
|
||
|
|
global $bx2;
|
||
|
|
|
||
|
|
$n = 0;
|
||
|
|
while ($start >= 0 && $len-- > 0) $n = $n * $bx2 + $x[$start--];
|
||
|
|
|
||
|
|
return $n;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function zeros($n) {
|
||
|
|
$r = array_fill(0, $n, 0);
|
||
|
|
while ($n-- > 0) $r[$n] = 0;
|
||
|
|
return $r;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @package verysimple::Encryption
|
||
|
|
*/
|
||
|
|
class bdiv {
|
||
|
|
var $q;
|
||
|
|
var $mod;
|
||
|
|
function bdiv($x, $y)
|
||
|
|
{
|
||
|
|
global $bs;
|
||
|
|
global $bx2;
|
||
|
|
global $bm;
|
||
|
|
global $bx;
|
||
|
|
global $bd;
|
||
|
|
global $bdm;
|
||
|
|
|
||
|
|
$n = count($x) - 1;
|
||
|
|
$t = count($y) - 1;
|
||
|
|
$nmt = $n - $t;
|
||
|
|
|
||
|
|
if ($n < $t || $n == $t && ($x[$n] < $y[$n] || $n > 0 && $x[$n] == $y[$n] && $x[$n - 1] < $y[$n - 1])) {
|
||
|
|
$this->q = array(0);
|
||
|
|
$this->mod = array($x);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($n == $t && toppart($x, $t, 2) / toppart($y, $t, 2) < 4) {
|
||
|
|
$qq = 0;
|
||
|
|
$xx = 0;
|
||
|
|
for(;;) {
|
||
|
|
$xx = bsub($x, $y);
|
||
|
|
if(count($xx) == 0) break;
|
||
|
|
$x = $xx; $qq++;
|
||
|
|
}
|
||
|
|
$this->q = array($qq);
|
||
|
|
$this->mod = $x;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
$shift2 = floor(log($y[$t]) / M_LN2) + 1;
|
||
|
|
$shift = $bs - $shift2;
|
||
|
|
if ($shift) {
|
||
|
|
$x = array_merge((array)$x); $y = array_merge((array)$y);
|
||
|
|
for($i = $t; $i > 0; $i--) $y[$i] = (($y[$i] << $shift) & $bm) | ($y[$i - 1] >> $shift2);
|
||
|
|
$y[0] = ($y[0] << $shift) & $bm;
|
||
|
|
if($x[$n] & (($bm << $shift2) & $bm)) {
|
||
|
|
$x[++$n] = 0; $nmt++;
|
||
|
|
}
|
||
|
|
for($i = $n; $i > 0; $i--) $x[$i] = (($x[$i] << $shift) & $bm) | ($x[$i - 1] >> $shift2);
|
||
|
|
$x[0] = ($x[0] << $shift) & $bm;
|
||
|
|
}
|
||
|
|
|
||
|
|
$i = 0;
|
||
|
|
$j = 0;
|
||
|
|
$x2 = 0;
|
||
|
|
$q = zeros($nmt + 1);
|
||
|
|
$y2 = array_merge(zeros($nmt), (array)$y);
|
||
|
|
for (;;) {
|
||
|
|
$x2 = bsub($x, $y2);
|
||
|
|
if(count($x2) == 0) break;
|
||
|
|
$q[$nmt]++;
|
||
|
|
$x = $x2;
|
||
|
|
}
|
||
|
|
|
||
|
|
$yt = $y[$t];
|
||
|
|
$top =toppart($y, $t, 2);
|
||
|
|
for ($i = $n; $i > $t; $i--) {
|
||
|
|
$m = $i - $t - 1;
|
||
|
|
if ($i >= count($x)) $q[$m] = 1;
|
||
|
|
else if($x[$i] == $yt) $q[$m] = $bm;
|
||
|
|
else $q[$m] = floor(toppart($x, $i, 2) / $yt);
|
||
|
|
|
||
|
|
$topx = toppart($x, $i, 3);
|
||
|
|
while ($q[$m] * $top > $topx) $q[$m]--;
|
||
|
|
|
||
|
|
$y2 = array_slice($y2, 1);
|
||
|
|
$x2 = bsub($x, bmul(array($q[$m]), $y2));
|
||
|
|
if (count($x2) == 0) {
|
||
|
|
$q[$m]--;
|
||
|
|
$x2 =bsub($x, bmul(array($q[m]), $y2));
|
||
|
|
}
|
||
|
|
$x = $x2;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($shift) {
|
||
|
|
for($i = 0; $i < count($x) - 1; $i++) $x[$i] = ($x[$i] >> $shift) | (($x[$i + 1] << $shift2) & $bm);
|
||
|
|
$x[count($x) - 1] >>= $shift;
|
||
|
|
}
|
||
|
|
$n = count($q);
|
||
|
|
while ($n > 1 && $q[$n - 1] == 0) $n--;
|
||
|
|
$this->q = array_slice($q, 0, $n);
|
||
|
|
$n = count($x);
|
||
|
|
while ($n > 1 && $x[$n - 1] == 0) $n--;
|
||
|
|
$this->mod = array_slice($x, 0, $n);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function bsub($a, $b) {
|
||
|
|
global $bs;
|
||
|
|
global $bx2;
|
||
|
|
global $bm;
|
||
|
|
global $bx;
|
||
|
|
global $bd;
|
||
|
|
global $bdm;
|
||
|
|
|
||
|
|
$al = count($a);
|
||
|
|
$bl = count($b);
|
||
|
|
|
||
|
|
if ($bl > $al) return array();
|
||
|
|
if ($bl == $al) {
|
||
|
|
if($b[$bl - 1] > $a[$bl - 1]) return array();
|
||
|
|
if($bl == 1) return array($a[0] - $b[0]);
|
||
|
|
}
|
||
|
|
|
||
|
|
$r = array_fill(0, $al, 0);
|
||
|
|
$c = 0;
|
||
|
|
|
||
|
|
for ($n = 0; $n < $bl; $n++) {
|
||
|
|
$c += $a[$n] - $b[$n];
|
||
|
|
$r[$n] = $c & $bm;
|
||
|
|
$c >>= $bs;
|
||
|
|
}
|
||
|
|
for (; $n < $al; $n++) {
|
||
|
|
$c += $a[$n];
|
||
|
|
$r[$n] = $c & $bm;
|
||
|
|
$c >>= $bs;
|
||
|
|
}
|
||
|
|
if ($c) return array();
|
||
|
|
|
||
|
|
if ($r[$n - 1]) return $r;
|
||
|
|
while ($n > 1 && $r[$n - 1] == 0) $n--;
|
||
|
|
|
||
|
|
return array_slice($r, 0, $n);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
*/
|
||
|
|
function bmul($a, $b) {
|
||
|
|
global $bs;
|
||
|
|
global $bx2;
|
||
|
|
global $bm;
|
||
|
|
global $bx;
|
||
|
|
global $bd;
|
||
|
|
global $bdm;
|
||
|
|
|
||
|
|
$b = array_merge((array)$b, array(0));
|
||
|
|
$al = count($a);
|
||
|
|
$bl = count($b);
|
||
|
|
$n = 0;
|
||
|
|
$nn = 0;
|
||
|
|
$aa = 0;
|
||
|
|
$c = 0;
|
||
|
|
$m = 0;
|
||
|
|
$g = 0;
|
||
|
|
$gg = 0;
|
||
|
|
$h = 0;
|
||
|
|
$hh = 0;
|
||
|
|
$ghh = 0;
|
||
|
|
$ghhb = 0;
|
||
|
|
|
||
|
|
$r = zeros($al + $bl + 1);
|
||
|
|
|
||
|
|
for ($n = 0; $n < $al; $n++) {
|
||
|
|
$aa = $a[$n];
|
||
|
|
if ($aa) {
|
||
|
|
$c = 0;
|
||
|
|
$hh = $aa >> $bd; $h = $aa & $bdm;
|
||
|
|
$m = $n;
|
||
|
|
for ($nn = 0; $nn < $bl; $nn++, $m++) {
|
||
|
|
$g = $b[$nn]; $gg = $g >> $bd; $g = $g & $bdm;
|
||
|
|
$ghh = $g * $hh + $h * $gg;
|
||
|
|
$ghhb = $ghh >> $bd; $ghh &= $bdm;
|
||
|
|
$c += $r[$m] + $h * $g + ($ghh << $bd);
|
||
|
|
$r[$m] = $c & $bm;
|
||
|
|
$c = ($c >> $bs) + $gg * $hh + $ghhb;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$n = count($r);
|
||
|
|
|
||
|
|
if ($r[$n - 1]) return $r;
|
||
|
|
while ($n > 1 && $r[$n - 1] == 0) $n--;
|
||
|
|
|
||
|
|
return array_slice($r, 0, $n);
|
||
|
|
}
|
||
|
|
|
||
|
|
?>
|