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一个双向加密解密法(php)

WBOY
Release: 2016-06-21 09:16:07
Original
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加密|解密

基于进制转换的


//made by huyang @2005-01-20||11-04-06
##用n进位制到m进位制
##0~9A-Z,最多可理解为36进制范围
print'

加密解密法';
class carry
  {
    function carry($n,$m)
      {
 $this->n=$n;
 $this->m=$m;
 $this->chn['0']=0;
 $this->chn['1']=1;
 $this->chn['2']=2;
 $this->chn['3']=3;
 $this->chn['4']=4;
        $this->chn['5']=5;
        $this->chn['6']=6;
        $this->chn['7']=7;
        $this->chn['8']=8;
        $this->chn['9']=9;
        $this->chn['A']=10;
        $this->chn['B']=11;
        $this->chn['C']=12;
        $this->chn['D']=13;
        $this->chn['E']=14;
        $this->chn['F']=15;
        $this->chn['G']=16;
        $this->chn['H']=17;
        $this->chn['I']=18;
        $this->chn['J']=19;
        $this->chn['K']=20;
        $this->chn['L']=21;
        $this->chn['M']=22;
        $this->chn['N']=23;
        $this->chn['O']=24;
        $this->chn['P']=25;
        $this->chn['Q']=26;
        $this->chn['R']=27;
        $this->chn['S']=28;
        $this->chn['T']=29;
        $this->chn['U']=30;
        $this->chn['V']=31;
        $this->chn['W']=32;
        $this->chn['X']=33;
        $this->chn['Y']=34;
        $this->chn['Z']=35;
        $this->cn[0]='0';
        $this->cn[1]='1';
        $this->cn[2]='2';
        $this->cn[3]='3';
        $this->cn[4]='4';
        $this->cn[5]='5';
        $this->cn[6]='6';
        $this->cn[7]='7';
        $this->cn[8]='8';
        $this->cn[9]='9';
        $this->cn[10]='A';
        $this->cn[11]='B';
        $this->cn[12]='C';
        $this->cn[13]='D';
        $this->cn[14]='E';
        $this->cn[15]='F';
        $this->cn[16]='G';
        $this->cn[17]='H';
        $this->cn[18]='I';
        $this->cn[19]='J';
        $this->cn[20]='K';
        $this->cn[21]='L';
        $this->cn[22]='M';
        $this->cn[23]='N';
        $this->cn[24]='O';
        $this->cn[25]='P';
        $this->cn[26]='Q';
        $this->cn[27]='R';
        $this->cn[28]='S';
        $this->cn[29]='T';
        $this->cn[30]='U';
        $this->cn[31]='V';
        $this->cn[32]='W';
        $this->cn[33]='X';
        $this->cn[34]='Y';
        $this->cn[35]='Z';
      }
    function check1($a)
      {
 if(ereg("[0-9]",$a))
   if($a>=2)
     if($a       return true;
 return false;
      }
    function check2($a)
      {
 $la=0;
 for($j=0;$j   {
     if($this->chn[substr($a,$j,1)]>=$this->n)
       $la=1;
     if($la)
       break;
   }
 if($la)
   return false;
 else
   return true;
      }
    function toDEC($a)//$n->十进制
      {
 if($this->n==10)
   return $a;
 else
   {
     $a=strrev($a);
     $k=0;
     for($i=0;$i       {
  $k+=$this->chn[substr($a,$i,1)]*pow($this->n,$i);
       }
     return $k;
   }
      }
    function gethigh($a)
      {
 if($a   return 1;
 else
   {
     for($i=0;$i       {
  if(pow($this->m,$i)>$a)
    break;
       }
     return $i;
   }
      }
    function toM($a)//十进制->$m
      {
 $a1=$this->gethigh($a);
 $res="";
 for($i=1;$i   {
     $u=($a-$a%pow($this->m,($a1-$i)))/(pow($this->m,($a1-$i)));
     $a-=$u*pow($this->m,($a1-$i));
     $res.=$this->cn[$u];
   }
 return $res;
      }
    function get($a)
      {
 if(!$this->n)$this->n=10;
 if(!$this->m)$this->m=10;
 if(($this->check1($this->n))&&($this->check1($this->m)))
   {
     if(ereg("[0-9A-Z]",$a))
       {
  if($this->check2($a))
    {
      return $this->toM($this->toDEC($a));
    }
  else
    return false;
       }
     else
       return false;
   }
 else
   return false;
      }
  }
class han
  {
    function han()
      {
 for($i=0;$i   {
     $this->hu1[$i]=$i;
     $this->hu2[$i]=$i;
   }
 for($i=10;$i   {
     $this->hu1[$i]=chr($i+55);
     $this->hu2[chr($i+55)]=$i;
   }
 for($i=36;$i   {
     $this->hu1[$i]=chr($i+61);
     $this->hu2[chr($i+61)]=$i;
   }
 $this->hu1[62]=chr(42);
 $this->hu1[63]=chr(43);
 $this->hu2[chr(42)]=62;
 $this->hu2[chr(43)]=63;
      }
    function tocode($str)//将一组字符转变成为代码0~65536
      {
 $huyang1=new carry(10,33);
 $j=0;
        for($i=0;$i   {
            $p=ord(substr($str,$i,1));
            if($p>160)
       {
                $q=ord(substr($str,++$i,1));
                $p=$p*256+$q;
              }
            else
       $p=255*256+$p;
     $ret.=$huyang1->get($p);
     $j++;
          }
        return $ret;
      }
    function getcode($str)
      {
 $huyang=new carry(33,10);
 $res="";
 for($i=0;$i   {
     $a=$huyang->get(substr($str,($i*4),4));
     $a2=$a%256;
     $a1=($a-$a2)/256;
     if($a1==255)
       $res.=chr($a2);
     else
       $res.=chr($a1).chr($a2);
   }
 return $res;
      }
    function encode($str)
      {
 $res="";
 $huyang=new carry(35,7);
 $huyang1=new carry(8,10);
 $str1=$this->tocode($str);
 $k=ceil(strlen($str1)/3);
 for($i=0;$i   {
     $word=$this->hu1[rand(0,61)];
     $res1=$huyang1->get($huyang->get(substr($str1,($i*3),3)));
     $res11=($res1-$res1%(64*64))/(64*64);
     $res1-=$res11*64*64;
     $res12=($res1-$res1%64)/64;
     $res1-=$res12*64;
     $res13=$res1;
     if($i==($k-1))
       {
  if($res11!=0)
    {
      $res.=$this->hu1[$res11].$this->hu1[$res12].$this->hu1[$res13].$word;
    }
  elseif($res12!=0)
    {
                    $res.=$this->hu1[$res12].$this->hu1[$res13].$word;
    }
  elseif($res13!=0)
    {
                    $res.=$this->hu1[$res13].$word;
    }
       }
     else
       $res.=$this->hu1[$res11].$this->hu1[$res12].$this->hu1[$res13].$word;
   }
 return trim($res);
      }
    function discode($str)
      {
 $len=ceil(strlen($str)/4);
 $res="";
 $a=strlen($str)-4*($len-1);
 for($i=0;$i   {
     if($i!=($len-1))
       {
         $res1=substr($str,$i*4,1);
         $res2=substr($str,($i*4+1),1);
         $res3=substr($str,($i*4+2),1);
         $res11=$this->hu2[$res1];
         $res12=$this->hu2[$res2];
         $res13=$this->hu2[$res3];
         $res14=$res11*64*64+$res12*64+$res13;
         $res.=" ".$res14;
       }
     else
       {
  if($a%4==0)
    {
                    $res1=substr($str,$i*4,1);
             $res2=substr($str,($i*4+1),1);
             $res3=substr($str,($i*4+2),1);
                    $res11=$this->hu2[$res1];
             $res12=$this->hu2[$res2];
             $res13=$this->hu2[$res3];
             $res14=$res11*64*64+$res12*64+$res13;
             $res.=" ".$res14;
    }
  elseif($a%4==2)
    {
                    $res1=substr($str,$i*4,1);
             $res11=$this->hu2[$res1];
             $res14=$res11;
             $res.=" ".$res14;
    }
  elseif($a%4==3)
    {
                    $res1=substr($str,$i*4,1);
             $res2=substr($str,($i*4+1),1);
             $res11=$this->hu2[$res1];
             $res12=$this->hu2[$res2];
             $res14=$res11*64+$res12;
             $res.=" ".$res14;
    }
       }
   }
 return trim($res);
      }
    function decode($str)
      {
 $str=$this->discode($str);
 $a=explode(" ",$str);
 $res="";
 $huyang=new carry(7,35);
 $huyang1=new carry(10,8);
 for($i=0;$i   {
            //$res.=$huyang->get($a[$i]);
            if($i==(count($a)-1))
       $res.=$huyang->get($huyang1->get($a[$i]));
     else
       {
  $b=$huyang->get($huyang1->get($a[$i]));
  if(strlen($b)==0)
    $res.="000";
  elseif(strlen($b)==1)
    $res.="00".$b;
  elseif(strlen($b)==2)
    $res.="0".$b;
  else
    $res.=$b;
       }
   }
 return $this->getcode($res);
      }
  }
$s=microtime();
$st=explode(' ',$s);
$st1=$st[0];
$st2=$st[1];
$huyang=new han;
$str=$_POST['str'];
if(!$str)$str="请输入查询语句!!";
$len=strlen($str);
if($submit)
  $a=$huyang->encode($str);
if($submit1)
  $a=$huyang->decode($str);
$a=str_replace("\\","\",$a);
$a=str_replace("\\"","\"",$a);
$a=str_replace("\\'","\'",$a);
$s=microtime();
$st=explode(' ',$s);
$sta=$st[0];
$stb=$st[1];
$ss1=$sta-$st1;
$ss2=$stb-$st2;
$cus=$ss1+$ss2;
$cus1=$cus/$len;
?>

 
 
     
     
   
   
     
     
   
   
     
     
   
 
耗费时间/字长-(平均耗时)
原始语句
结果

 


 


       




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