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注册 2006-5-1
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这些ＰＨＰ函数如何转成ＪＳ的．？
#---------rc4----------------------
# usage: prepare_key($the_key);
# rc4($the_message);
$keystate=array();
$keyx;
$keyy;
function prepare_key($the_key) {
global $keystate, $keyx, $keyy;
$key = $the_key;
$keyary=array();
$index;
$jump;
$temp;
$keylen;
$keylen = strlen($key);
for ($index = 0; $index <= 255; $index++) {
$keyary[$index] = Ord(substr($key, $index%$keylen, 1));
}
for ($index = 0; $index <= 255; $index++) {
$keystate[$index] = $index;
}
$jump = 0;
for ($index = 0; $index <= 255; $index++) {
$jump = ($jump + $keystate[$index] + $keyary[$index])%256;
$temp = $keystate[$index];
$keystate[$index] = $keystate[$jump];
$keystate[$jump] = $temp;
}
$keyx = 0;
$keyy = 0;
}
function rc4($the_message) {
global $keystate, $keyx, $keyy;
$message = $the_message;
$RC4;
$index;
$jump;
$temp;
$y;
$t;
$x;
$index = $keyx;
$jump = $keyy;
$RC4 = "";
for ($x = 0; $x < strlen($message); $x++) {
$index = ($index + 1)%256;
$jump = ($jump + $keystate[$index])%256;
$t = ($keystate[$index] + $keystate[$jump])%256;
$temp = $keystate[$index];
$keystate[$index] = $keystate[$jump];
$keystate[$jump] = $temp;
$y = $keystate[$t];
$RC4 .= Chr(Ord(substr($message, $x, 1))^$y);
}
$keyx = $index;
$keyy = $jump;
return($RC4);
}
#---------xtea---------------------
# usage: xteaencode($the_message, $the_key);
# xteadecode($the_message, $the_key);
function xteaplus($a, $b) {
$ret;
if ($b > 0 && $a > 2147483647 - $b) {
$ret = -2147483648 + ($a - (2147483647 - $b)) - 1;
return($ret);
}
if ($b < 0 && $a < -2147483648 - $b) {
$ret = 2147483647-(-2147483648 - $b - $a) + 1;
return($ret);
}
$ret = $a + $b;
return($ret);
}
function xteaencode($the_message, $the_key) {
$message = $the_message;
$key = $the_key;
if (strlen($message) != 8 || strlen($key) != 16) { return(""); }
$k=array();
for ($i=0; $i<4; $i++) {
$k[$i] = 0;
for ($x=0; $x<4; $x++) {
$k[$i] <<= 8;
$k[$i] |= Ord(substr($key, $i*4+$x, 1));
}
}
$v=array();
for ($i=0; $i<2; $i++) {
$v[$i] = 0;
for ($x=0; $x<4; $x++) {
$v[$i] <<= 8;
$v[$i] |= Ord(substr($message, $i*4+$x, 1));
}
}
$y=$v[0];
$z=$v[1];
$sum=0;
$delta=-1640531527;
$n=32;
while($n-->0) {
$y = xteaplus($y, xteaplus(($z << 4 ^ ($z >> 5 & 0x07ffffff)), $z) ^ xteaplus($sum, $k[$sum&3]));
$sum = xteaplus($sum, $delta);
$z = xteaplus($z, xteaplus(($y << 4 ^ ($y >> 5 & 0x07ffffff)), $y) ^ xteaplus($sum, $k[($sum>>11) & 3]));
}
$v[0] = $y; $v[1] = $z;
$ret = "";
for ($i=0; $i<2; $i++) {
for ($x=0; $x<4; $x++) {
$ret .= Chr(($v[$i]>>(24-$x*8))&0xff);
}
}
return($ret);
}
function xteadecode($the_message, $the_key) {
$message = $the_message;
$key = $the_key;
if (strlen($message) != 8 || strlen($key) != 16) { return(""); }
$k=array();
for ($i=0; $i<4; $i++) {
$k[$i] = 0;
for ($x=0; $x<4; $x++) {
$k[$i] <<= 8;
$k[$i] |= Ord(substr($key, $i*4+$x, 1));
}
}
$v=array();
for ($i=0; $i<2; $i++) {
$v[$i] = 0;
for ($x=0; $x<4; $x++) {
$v[$i] <<= 8;
$v[$i] |= Ord(substr($message, $i*4+$x, 1));
}
}
$y=$v[0];
$z=$v[1];
$sum=-957401312;
$delta=-1640531527;
$n=32;
while($n-->0) {
$z = xteaplus($z, -(xteaplus(($y << 4 ^ ($y >> 5 & 0x07ffffff)), $y) ^ xteaplus($sum, $k[($sum>>11) & 3])));
$sum = xteaplus($sum, -$delta);
$y = xteaplus($y, -(xteaplus(($z << 4 ^ ($z >> 5 & 0x07ffffff)), $z) ^ xteaplus($sum, $k[$sum&3])));
}
$v[0] = $y; $v[1] = $z;
$ret = "";
for ($i=0; $i<2; $i++) {
for ($x=0; $x<4; $x++) {
$ret .= Chr(($v[$i]>>(24-$x*8))&0xff);
}
}
return($ret);
}
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