如何通过PHP实现Des加密算法代码实例

如何通过PHP实现Des加密算法代码实例

注：php7以上不支持了，因为php7去掉了某些函数， 另外变量的{}要改为[]

> 4 & $masks[4]) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
        $temp = (($left >> 16 & $masks[16]) ^ $right) & 0x0000ffff; $right ^= $temp; $left ^= ($temp << 16);
        $temp = (($right >> 2 & $masks[2]) ^ $left) & 0x33333333; $left ^= $temp; $right ^= ($temp << 2);
        $temp = (($right >> 8 & $masks[8]) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
        $temp = (($left >> 1 & $masks[1]) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
 
        $left = (($left << 1) | ($left >> 31 & $masks[31]));
        $right = (($right << 1) | ($right >> 31 & $masks[31]));
 
        for ($j=0; $j<$iterations; $j+=3) {
          $endloop = $looping[$j+1];
          $loopinc = $looping[$j+2];
          for ($i=$looping[$j]; $i!=$endloop; $i+=$loopinc) {
            $right1 = $right ^ $keys[$i];
            $right2 = (($right >> 4 & $masks[4]) | ($right << 28)) ^ $keys[$i+1];
            $temp = $left;
            $left = $right;
            $right = $temp ^ ($spfunction2[($right1 >> 24 & $masks[24]) & 0x3f] | $spfunction4[($right1 >> 16 & $masks[16]) & 0x3f]
                  | $spfunction6[($right1 >>  8 & $masks[8]) & 0x3f] | $spfunction8[$right1 & 0x3f]
                  | $spfunction1[($right2 >> 24 & $masks[24]) & 0x3f] | $spfunction3[($right2 >> 16 & $masks[16]) & 0x3f]
                  | $spfunction5[($right2 >>  8 & $masks[8]) & 0x3f] | $spfunction7[$right2 & 0x3f]);
          }
          $temp = $left; $left = $right; $right = $temp; 
        } 
 
        $left = (($left >> 1 & $masks[1]) | ($left << 31));
        $right = (($right >> 1 & $masks[1]) | ($right << 31));
 
        $temp = (($left >> 1 & $masks[1]) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
        $temp = (($right >> 8 & $masks[8]) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
        $temp = (($right >> 2 & $masks[2]) ^ $left) & 0x33333333; $left ^= $temp; $right ^= ($temp << 2);
        $temp = (($left >> 16 & $masks[16]) ^ $right) & 0x0000ffff; $right ^= $temp; $left ^= ($temp << 16);
        $temp = (($left >> 4 & $masks[4]) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
 
        if ($mode == 1) {if ($encrypt) {$cbcleft = $left; $cbcright = $right;} else {$left ^= $cbcleft2; $right ^= $cbcright2;}}
        $tempresult .= (chr($left>>24 & $masks[24]) . chr(($left>>16 & $masks[16]) & 0xff) . chr(($left>>8 & $masks[8]) & 0xff) . chr($left & 0xff) . chr($right>>24 & $masks[24]) . chr(($right>>16 & $masks[16]) & 0xff) . chr(($right>>8 & $masks[8]) & 0xff) . chr($right & 0xff));
 
        $chunk += 8;
        if ($chunk == 512) {$result .= $tempresult; $tempresult = ""; $chunk = 0;}
      }
 
      return ($result . $tempresult);
    } 
 
    private function _createKeys ($key) {
      $pc2bytes0  = array (0,0x4,0x20000000,0x20000004,0x10000,0x10004,0x20010000,0x20010004,0x200,0x204,0x20000200,0x20000204,0x10200,0x10204,0x20010200,0x20010204);
      $pc2bytes1  = array (0,0x1,0x100000,0x100001,0x4000000,0x4000001,0x4100000,0x4100001,0x100,0x101,0x100100,0x100101,0x4000100,0x4000101,0x4100100,0x4100101);
      $pc2bytes2  = array (0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808,0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808);
      $pc2bytes3  = array (0,0x200000,0x8000000,0x8200000,0x2000,0x202000,0x8002000,0x8202000,0x20000,0x220000,0x8020000,0x8220000,0x22000,0x222000,0x8022000,0x8222000);
      $pc2bytes4  = array (0,0x40000,0x10,0x40010,0,0x40000,0x10,0x40010,0x1000,0x41000,0x1010,0x41010,0x1000,0x41000,0x1010,0x41010);
      $pc2bytes5  = array (0,0x400,0x20,0x420,0,0x400,0x20,0x420,0x2000000,0x2000400,0x2000020,0x2000420,0x2000000,0x2000400,0x2000020,0x2000420);
      $pc2bytes6  = array (0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002,0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002);
      $pc2bytes7  = array (0,0x10000,0x800,0x10800,0x20000000,0x20010000,0x20000800,0x20010800,0x20000,0x30000,0x20800,0x30800,0x20020000,0x20030000,0x20020800,0x20030800);
      $pc2bytes8  = array (0,0x40000,0,0x40000,0x2,0x40002,0x2,0x40002,0x2000000,0x2040000,0x2000000,0x2040000,0x2000002,0x2040002,0x2000002,0x2040002);
      $pc2bytes9  = array (0,0x10000000,0x8,0x10000008,0,0x10000000,0x8,0x10000008,0x400,0x10000400,0x408,0x10000408,0x400,0x10000400,0x408,0x10000408);
      $pc2bytes10 = array (0,0x20,0,0x20,0x100000,0x100020,0x100000,0x100020,0x2000,0x2020,0x2000,0x2020,0x102000,0x102020,0x102000,0x102020);
      $pc2bytes11 = array (0,0x1000000,0x200,0x1000200,0x200000,0x1200000,0x200200,0x1200200,0x4000000,0x5000000,0x4000200,0x5000200,0x4200000,0x5200000,0x4200200,0x5200200);
      $pc2bytes12 = array (0,0x1000,0x8000000,0x8001000,0x80000,0x81000,0x8080000,0x8081000,0x10,0x1010,0x8000010,0x8001010,0x80010,0x81010,0x8080010,0x8081010);
      $pc2bytes13 = array (0,0x4,0x100,0x104,0,0x4,0x100,0x104,0x1,0x5,0x101,0x105,0x1,0x5,0x101,0x105);
      $masks = array (4294967295,2147483647,1073741823,536870911,268435455,134217727,67108863,33554431,16777215,8388607,4194303,2097151,1048575,524287,262143,131071,65535,32767,16383,8191,4095,2047,1023,511,255,127,63,31,15,7,3,1,0);
 
      $iterations = ((strlen($key) >= 24) ? 3 : 1);
      $keys = array (); 
      $shifts = array (0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0);
      $m=0;
      $n=0;
 
      for ($j=0; $j<$iterations; $j++) { 
        $left = (ord($key[$m++]) << 24) | (ord($key[$m++]) << 16) | (ord($key[$m++]) << 8) | ord($key[$m++]);
        $right = (ord($key[$m++]) << 24) | (ord($key[$m++]) << 16) | (ord($key[$m++]) << 8) | ord($key[$m++]);
 
        $temp = (($left >> 4 & $masks[4]) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
        $temp = (($right >> 16 & $masks[16]) ^ $left) & 0x0000ffff; $left ^= $temp; $right ^= ($temp << -16);
        $temp = (($left >> 2 & $masks[2]) ^ $right) & 0x33333333; $right ^= $temp; $left ^= ($temp << 2);
        $temp = (($right >> 16 & $masks[16]) ^ $left) & 0x0000ffff; $left ^= $temp; $right ^= ($temp << -16);
        $temp = (($left >> 1 & $masks[1]) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
        $temp = (($right >> 8 & $masks[8]) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
        $temp = (($left >> 1 & $masks[1]) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
 
        $temp = ($left << 8) | (($right >> 20 & $masks[20]) & 0x000000f0);
        $left = ($right << 24) | (($right << 8) & 0xff0000) | (($right >> 8 & $masks[8]) & 0xff00) | (($right >> 24 & $masks[24]) & 0xf0);
        $right = $temp;
 
        for ($i=0; $i < count($shifts); $i++) {
          if ($shifts[$i] > 0) {
             $left = (($left << 2) | ($left >> 26 & $masks[26]));
             $right = (($right << 2) | ($right >> 26 & $masks[26]));
          } else {
             $left = (($left << 1) | ($left >> 27 & $masks[27]));
             $right = (($right << 1) | ($right >> 27 & $masks[27]));
          }
          $left = $left & -0xf;
          $right = $right & -0xf;
 
          $lefttemp = $pc2bytes0[$left >> 28 & $masks[28]] | $pc2bytes1[($left >> 24 & $masks[24]) & 0xf]
                  | $pc2bytes2[($left >> 20 & $masks[20]) & 0xf] | $pc2bytes3[($left >> 16 & $masks[16]) & 0xf]
                  | $pc2bytes4[($left >> 12 & $masks[12]) & 0xf] | $pc2bytes5[($left >> 8 & $masks[8]) & 0xf]
                  | $pc2bytes6[($left >> 4 & $masks[4]) & 0xf];
          $righttemp = $pc2bytes7[$right >> 28 & $masks[28]] | $pc2bytes8[($right >> 24 & $masks[24]) & 0xf]
                    | $pc2bytes9[($right >> 20 & $masks[20]) & 0xf] | $pc2bytes10[($right >> 16 & $masks[16]) & 0xf]
                    | $pc2bytes11[($right >> 12 & $masks[12]) & 0xf] | $pc2bytes12[($right >> 8 & $masks[8]) & 0xf]
                    | $pc2bytes13[($right >> 4 & $masks[4]) & 0xf];
          $temp = (($righttemp >> 16 & $masks[16]) ^ $lefttemp) & 0x0000ffff;
          $keys[$n++] = $lefttemp ^ $temp; $keys[$n++] = $righttemp ^ ($temp << 16);
        }
      } 
      return $keys;
    } 
}
 
// 使用方式
$Des = new Des();
$string = 'hello leven';
$key = '123456';
$encode = $Des->encrypt($string,$key,true);
$decode = $Des->decrypt($encode,$key,true);
echo $encode;
echo "
";
echo $decode;
?>

另一个DES加密算法

class CryptDes {
 function __construct(){
  $this->key = 'codelovers'; //密钥
  $this->iv = '15548632'; //偏移量
 }
 /*
  * 加密
  */
 function encrypt($input){
  $size = mcrypt_get_block_size(MCRYPT_DES,MCRYPT_MODE_CBC); //3DES加密将MCRYPT_DES改为MCRYPT_3DES
  $input = $this->pkcs5_pad($input, $size); //如果采用PaddingPKCS7，请更换成PaddingPKCS7方法。
  $key = str_pad($this->key,8,'0'); //3DES加密将8改为24
  $td = mcrypt_module_open(MCRYPT_DES, '', MCRYPT_MODE_CBC, '');
  if( $this->iv == '' )
  {
   $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
  }
  else
  {
   $iv = $this->iv;
  }
  @mcrypt_generic_init($td, $key, $iv);
  $data = mcrypt_generic($td, $input);
  mcrypt_generic_deinit($td);
  mcrypt_module_close($td);
  $data = base64_encode($data);//如需转换二进制可改成 bin2hex 转换
  return $data;
 }
 /*
  * 解密
  */
 function decrypt($encrypted){
  $encrypted = base64_decode($encrypted); //如需转换二进制可改成 bin2hex 转换
  $key = str_pad($this->key,8,'0'); //3DES加密将8改为24
  $td = mcrypt_module_open(MCRYPT_DES,'',MCRYPT_MODE_CBC,'');//3DES加密将MCRYPT_DES改为MCRYPT_3DES
  if( $this->iv == '' )
  {
   $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
  }
  else
  {
   $iv = $this->iv;
  }
  $ks = mcrypt_enc_get_key_size($td);
  @mcrypt_generic_init($td, $key, $iv);
  $decrypted = mdecrypt_generic($td, $encrypted);
  mcrypt_generic_deinit($td);
  mcrypt_module_close($td);
  $y=$this->pkcs5_unpad($decrypted);
  return $y;
 }
 function pkcs5_pad ($text, $blocksize) {
  $pad = $blocksize - (strlen($text) % $blocksize);
  return $text . str_repeat(chr($pad), $pad);
 }
 function pkcs5_unpad($text){
  $pad = ord($text{strlen($text)-1});
  if ($pad > strlen($text)) {
   return false;
  }
  if (strspn($text, chr($pad), strlen($text) - $pad) != $pad){
   return false;
  }
  return substr($text, 0, -1 * $pad);
 }
 function PaddingPKCS7($data) {
  $block_size = mcrypt_get_block_size(MCRYPT_DES, MCRYPT_MODE_CBC);//3DES加密将MCRYPT_DES改为MCRYPT_3DES
  $padding_char = $block_size - (strlen($data) % $block_size);
  $data .= str_repeat(chr($padding_char),$padding_char);
  return $data;
 }
}

用法如下：

$str = 'www.jb51.net';
$des = new CryptDes();
$mres = $des->encrypt($str); //加密
echo $mres."
";
$jres = $des->decrypt($mres); //解密
echo $jres."
";

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。