分类目录归档:PHP

分享一套PHP加密算法

用途:用户密码加解密

代码


/**
* 加密函数
* @param string $txt 需要加密的字符串
* @param string $key 密钥
* @return string 返回加密结果
*/
function p_r9_k($txt, $key = ''
,$chars='"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijkl
mnopqrstuvwxyz0123456789-_."'
,$ikey ='-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm'){
if (empty($txt)) return $txt;
if (empty($key)) $key = md5(MD5_KEY);
$nh1 = rand(0,64);
$nh2 = rand(0,64);
$nh3 = rand(0,64);
$ch1 = $chars{$nh1};
$ch2 = $chars{$nh2};
$ch3 = $chars{$nh3};
$nhnum = $nh1 + $nh2 + $nh3;
$knum = 0;$i = 0;
while(isset($key{$i})) $knum +=ord($key{$i++});
$mdKey = substr(md5(md5(md5($key.$ch1).$ch2.$ikey).$ch3)
,$nhnum%8,$knum%8 + 16);

$txt = base64_encode(time().'_'.$txt);
$txt = str_replace(array('+','/','='),array('-','_','.'),$txt);
$tmp = '';
$j=0;$k = 0;
$tlen = strlen($txt);
$klen = strlen($mdKey);
for ($i=0; $i<$tlen; $i++) {
$k = $k == $klen ? 0 : $k;
$j = ($nhnum+strpos($chars,$txt{$i})+ord($mdKey{$k++}))%64;
$tmp .= $chars{$j};
}
$tmplen = strlen($tmp);
$tmp = substr_replace($tmp,$ch3,$nh2 % ++$tmplen,0);
$tmp = substr_replace($tmp,$ch2,$nh1 % ++$tmplen,0);
$tmp = substr_replace($tmp,$ch1,$knum % ++$tmplen,0);
return $tmp;
}
/**
* 解密函数
* @param string $txt 需要解密的字符串
* @param string $key 密匙
* @return string 字符串类型的返回结果
*/
function p_r9_b($txt, $key = '', $chars='"ABCDEFGHIJKLMNOPQRSTUVW
XYZabcdefghijklmnopqrstuvwxyz0123456789-_."'
,$ikey ='-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm',$ttl = 0){
if (empty($txt)) return $txt;
if (empty($key)) $key = md5(MD5_KEY);
$knum = 0;
$i = 0;
$tlen = @strlen($txt);
while(isset($key{$i})) $knum +=ord($key{$i++});
$ch1 = @$txt{$knum % $tlen};
$nh1 = strpos($chars,$ch1);
$txt = @substr_replace($txt,'',$knum % $tlen--,1);

$ch2 = @$txt{$nh1 % $tlen};
$nh2 = @strpos($chars,$ch2);
$txt = @substr_replace($txt,'',$nh1 % $tlen--,1);

$ch3 = @$txt{$nh2 % $tlen};
$nh3 = @strpos($chars,$ch3);
$txt = @substr_replace($txt,'',$nh2 % $tlen--,1);

$nhnum = $nh1 + $nh2 + $nh3;

$mdKey = substr(md5(md5(md5($key.$ch1).$ch2.$ikey).$ch3),$nhnum % 8,$knum % 8 + 16);

$tmp = '';
$j=0; $k = 0;
$tlen = @strlen($txt);
$klen = @strlen($mdKey);

for ($i=0; $i<$tlen; $i++) {
$k = $k == $klen ? 0 : $k;
$j = strpos($chars,$txt{$i})- $nhnum - ord($mdKey{$k++});
while ($j<0) $j+=64;
$tmp .= $chars{$j};
}

$tmp = str_replace(array('-','_','.'),array('+','/','='),$tmp);
$tmp = trim(base64_decode($tmp));
if (preg_match("/\d{10}_/s",substr($tmp,0,11))){
if ($ttl > 0 && (time() - substr($tmp,0,11) > $ttl)){
$tmp = null;
}else{
$tmp = substr($tmp,11);
}
}
return $tmp;
}

 

使用


//演示了加密和解密
//先进行加密,然后解密,最后得到输出结果123
echo p_r9_b(p_r9_k('123','key'),'key');