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[]

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<?php class Des {   /**    * 加密方法    *    * @param string $str  需要加密的内容    * @param string $key  密钥    * @param bool $toBase64 是否base64    * return string    */      public function encrypt( $str , $key , $toBase64 =true)      {          if ( $str == "" ) {              return "" ;          }    if ( $toBase64 ) {     return base64_encode (self::_des( $key , $str ,1));    }    return self::_des( $key , $str ,1);      }     /**    * 解密方法    *    * @param string $str  需要加密的内容    * @param string $key  密钥    * @param bool $toBase64 是否base64    * return string    */      public function decrypt( $str , $key , $toBase64 =true)      {          if ( $str == "" ) {              return "" ;          }    if ( $toBase64 ) {     return self::_des( $key , base64_decode ( $str ),0);    }    return self::_des( $key , $str ,0);      }        private function _des( $key , $message , $encrypt , $mode =0, $iv =null) {        $spfunction1 = array (0x1010400,0,0x10000,0x1010404,0x1010004,0x10404,0x4,0x10000,0x400,0x1010400,0x1010404,0x400,0x1000404,0x1010004,0x1000000,0x4,0x404,0x1000400,0x1000400,0x10400,0x10400,0x1010000,0x1010000,0x1000404,0x10004,0x1000004,0x1000004,0x10004,0,0x404,0x10404,0x1000000,0x10000,0x1010404,0x4,0x1010000,0x1010400,0x1000000,0x1000000,0x400,0x1010004,0x10000,0x10400,0x1000004,0x400,0x4,0x1000404,0x10404,0x1010404,0x10004,0x1010000,0x1000404,0x1000004,0x404,0x10404,0x1010400,0x404,0x1000400,0x1000400,0,0x10004,0x10400,0,0x1010004);        $spfunction2 = array (-0x7fef7fe0,-0x7fff8000,0x8000,0x108020,0x100000,0x20,-0x7fefffe0,-0x7fff7fe0,-0x7fffffe0,-0x7fef7fe0,-0x7fef8000,-0x80000000,-0x7fff8000,0x100000,0x20,-0x7fefffe0,0x108000,0x100020,-0x7fff7fe0,0,-0x80000000,0x8000,0x108020,-0x7ff00000,0x100020,-0x7fffffe0,0,0x108000,0x8020,-0x7fef8000,-0x7ff00000,0x8020,0,0x108020,-0x7fefffe0,0x100000,-0x7fff7fe0,-0x7ff00000,-0x7fef8000,0x8000,-0x7ff00000,-0x7fff8000,0x20,-0x7fef7fe0,0x108020,0x20,0x8000,-0x80000000,0x8020,-0x7fef8000,0x100000,-0x7fffffe0,0x100020,-0x7fff7fe0,-0x7fffffe0,0x100020,0x108000,0,-0x7fff8000,0x8020,-0x80000000,-0x7fefffe0,-0x7fef7fe0,0x108000);        $spfunction3 = array (0x208,0x8020200,0,0x8020008,0x8000200,0,0x20208,0x8000200,0x20008,0x8000008,0x8000008,0x20000,0x8020208,0x20008,0x8020000,0x208,0x8000000,0x8,0x8020200,0x200,0x20200,0x8020000,0x8020008,0x20208,0x8000208,0x20200,0x20000,0x8000208,0x8,0x8020208,0x200,0x8000000,0x8020200,0x8000000,0x20008,0x208,0x20000,0x8020200,0x8000200,0,0x200,0x20008,0x8020208,0x8000200,0x8000008,0x200,0,0x8020008,0x8000208,0x20000,0x8000000,0x8020208,0x8,0x20208,0x20200,0x8000008,0x8020000,0x8000208,0x208,0x8020000,0x20208,0x8,0x8020008,0x20200);        $spfunction4 = array (0x802001,0x2081,0x2081,0x80,0x802080,0x800081,0x800001,0x2001,0,0x802000,0x802000,0x802081,0x81,0,0x800080,0x800001,0x1,0x2000,0x800000,0x802001,0x80,0x800000,0x2001,0x2080,0x800081,0x1,0x2080,0x800080,0x2000,0x802080,0x802081,0x81,0x800080,0x800001,0x802000,0x802081,0x81,0,0,0x802000,0x2080,0x800080,0x800081,0x1,0x802001,0x2081,0x2081,0x80,0x802081,0x81,0x1,0x2000,0x800001,0x2001,0x802080,0x800081,0x2001,0x2080,0x800000,0x802001,0x80,0x800000,0x2000,0x802080);        $spfunction5 = array (0x100,0x2080100,0x2080000,0x42000100,0x80000,0x100,0x40000000,0x2080000,0x40080100,0x80000,0x2000100,0x40080100,0x42000100,0x42080000,0x80100,0x40000000,0x2000000,0x40080000,0x40080000,0,0x40000100,0x42080100,0x42080100,0x2000100,0x42080000,0x40000100,0,0x42000000,0x2080100,0x2000000,0x42000000,0x80100,0x80000,0x42000100,0x100,0x2000000,0x40000000,0x2080000,0x42000100,0x40080100,0x2000100,0x40000000,0x42080000,0x2080100,0x40080100,0x100,0x2000000,0x42080000,0x42080100,0x80100,0x42000000,0x42080100,0x2080000,0,0x40080000,0x42000000,0x80100,0x2000100,0x40000100,0x80000,0,0x40080000,0x2080100,0x40000100);        $spfunction6 = array (0x20000010,0x20400000,0x4000,0x20404010,0x20400000,0x10,0x20404010,0x400000,0x20004000,0x404010,0x400000,0x20000010,0x400010,0x20004000,0x20000000,0x4010,0,0x400010,0x20004010,0x4000,0x404000,0x20004010,0x10,0x20400010,0x20400010,0,0x404010,0x20404000,0x4010,0x404000,0x20404000,0x20000000,0x20004000,0x10,0x20400010,0x404000,0x20404010,0x400000,0x4010,0x20000010,0x400000,0x20004000,0x20000000,0x4010,0x20000010,0x20404010,0x404000,0x20400000,0x404010,0x20404000,0,0x20400010,0x10,0x4000,0x20400000,0x404010,0x4000,0x400010,0x20004010,0,0x20404000,0x20000000,0x400010,0x20004010);        $spfunction7 = array (0x200000,0x4200002,0x4000802,0,0x800,0x4000802,0x200802,0x4200800,0x4200802,0x200000,0,0x4000002,0x2,0x4000000,0x4200002,0x802,0x4000800,0x200802,0x200002,0x4000800,0x4000002,0x4200000,0x4200800,0x200002,0x4200000,0x800,0x802,0x4200802,0x200800,0x2,0x4000000,0x200800,0x4000000,0x200800,0x200000,0x4000802,0x4000802,0x4200002,0x4200002,0x2,0x200002,0x4000000,0x4000800,0x200000,0x4200800,0x802,0x200802,0x4200800,0x802,0x4000002,0x4200802,0x4200000,0x200800,0,0x2,0x4200802,0,0x200802,0x4200000,0x800,0x4000002,0x4000800,0x800,0x200002);        $spfunction8 = array (0x10001040,0x1000,0x40000,0x10041040,0x10000000,0x10001040,0x40,0x10000000,0x40040,0x10040000,0x10041040,0x41000,0x10041000,0x41040,0x1000,0x40,0x10040000,0x10000040,0x10001000,0x1040,0x41000,0x40040,0x10040040,0x10041000,0x1040,0,0,0x10040040,0x10000040,0x10001000,0x41040,0x40000,0x41040,0x40000,0x10041000,0x1000,0x40,0x10040040,0x1000,0x41040,0x10001000,0x40,0x10000040,0x10040000,0x10040040,0x10000000,0x40000,0x10001040,0,0x10041040,0x40040,0x10000040,0x10040000,0x10001000,0x10001040,0,0x10041040,0x41000,0x41000,0x1040,0x1040,0x40040,0x10000000,0x10041000);        $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);          $keys = self::_createKeys ( $key );        $m =0;        $len = strlen ( $message );        $chunk = 0;          $iterations = (( count ( $keys ) == 32) ? 3 : 9);        if ( $iterations == 3) { $looping = (( $encrypt ) ? array (0, 32, 2) : array (30, -2, -2));}        else { $looping = (( $encrypt ) ? array (0, 32, 2, 62, 30, -2, 64, 96, 2) : array (94, 62, -2, 32, 64, 2, 30, -2, -2));}          $message .= ( chr (0) . chr (0) . chr (0) . chr (0) . chr (0) . chr (0) . chr (0) . chr (0));          $result = "" ;        $tempresult = "" ;          if ( $mode == 1) {          $cbcleft = (ord( $iv [ $m ++]) << 24) | (ord( $iv [ $m ++]) << 16) | (ord( $iv [ $m ++]) << 8) | ord( $iv [ $m ++]);          $cbcright = (ord( $iv [ $m ++]) << 24) | (ord( $iv [ $m ++]) << 16) | (ord( $iv [ $m ++]) << 8) | ord( $iv [ $m ++]);          $m =0;        }          while ( $m < $len ) {          $left = (ord( $message [ $m ++]) << 24) | (ord( $message [ $m ++]) << 16) | (ord( $message [ $m ++]) << 8) | ord( $message [ $m ++]);          $right = (ord( $message [ $m ++]) << 24) | (ord( $message [ $m ++]) << 16) | (ord( $message [ $m ++]) << 8) | ord( $message [ $m ++]);            if ( $mode == 1) { if ( $encrypt ) { $left ^= $cbcleft ; $right ^= $cbcright ;} else { $cbcleft2 = $cbcleft ; $cbcright2 = $cbcright ; $cbcleft = $left ; $cbcright = $right ;}}            $temp = (( $left >> 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 "<br />" ; echo $decode ; ?>

另一个DES加密算法

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

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原文链接：https://www.cnblogs.com/forforever/p/12674203.html