PHP 常见加密方式【PHP教程】

概述1.方法<?phpfunctionencryptDecrypt($key,$string,$decrypt){if($decrypt){$decrypted=rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256,md5($key),base64_decode($string),MCRYPT_MODE_CBC,md5(md5($key))),"12");retur 1.方法

<?PHP  function encryptDecrypt($key, $string, $decrypt){       if($decrypt){           $decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($string), MCRYPT_MODE_CBC, md5(md5($key))), \"12\");           return $decrypted;       }else{           $encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key))));           return $encrypted;       }   }   //加密:\"z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=\"  echo encryptDecrypt(\'password\', \'Helloweba欢迎您\',0);   //解密:\"Helloweba欢迎您\"  echo encryptDecrypt(\'password\', \'z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=\',1);  ?>  

2.方法

<?PHP  //加密函数  function lock_url($txt,$key=\'liiu\'){      $chars = \"ABCDEFGHIJKLMnopQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+\";      $nh = rand(0,64);      $ch = $chars[$nh];      $mdKey = md5($key.$ch);      $mdKey = substr($mdKey,$nh%8, $nh%8+7);      $txt = base64_encode($txt);      $tmp = \'\';      $i=0;$j=0;$k = 0;      for ($i=0; $i<strlen($txt); $i++) {          $k = $k == strlen($mdKey) ? 0 : $k;          $j = ($nh+strpos($chars,$txt[$i])+ord($mdKey[$k++]))%64;          $tmp .= $chars[$j];      }      return urlencode($ch.$tmp);  }  //解密函数  function unlock_url($txt,$key=\'liiu\'){      $txt = urldecode($txt);      $chars = \"ABCDEFGHIJKLMnopQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+\";      $ch = $txt[0];      $nh = strpos($chars,$ch);      $mdKey = md5($key.$ch);      $mdKey = substr($mdKey,$nh%8, $nh%8+7);      $txt = substr($txt,1);      $tmp = \'\';      $i=0;$j=0; $k = 0;      for ($i=0; $i<strlen($txt); $i++) {          $k = $k == strlen($mdKey) ? 0 : $k;          $j = strpos($chars,$txt[$i])-$nh - ord($mdKey[$k++]);          while ($j<0) $j+=64;          $tmp .= $chars[$j];      }      return base64_decode($tmp);  }  ?>  

3.方法

<?PHP  //改进后的算法  //加密函数  function lock_url($txt,$key=\'str\'){      $txt = $txt.$key;      $chars = \"ABCDEFGHIJKLMnopQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+\";      $nh = rand(0,64);      $ch = $chars[$nh];      $mdKey = md5($key.$ch);      $mdKey = substr($mdKey,$nh%8, $nh%8+7);      $txt = base64_encode($txt);      $tmp = \'\';      $i=0;$j=0;$k = 0;      for ($i=0; $i<strlen($txt); $i++) {          $k = $k == strlen($mdKey) ? 0 : $k;          $j = ($nh+strpos($chars,$txt[$i])+ord($mdKey[$k++]))%64;          $tmp .= $chars[$j];      }      return urlencode(base64_encode($ch.$tmp));  }  //解密函数  function unlock_url($txt,$key=\'str\'){      $txt = base64_decode(urldecode($txt));      $chars = \"ABCDEFGHIJKLMnopQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+\";      $ch = $txt[0];      $nh = strpos($chars,$ch);      $mdKey = md5($key.$ch);      $mdKey = substr($mdKey,$nh%8, $nh%8+7);      $txt = substr($txt,1);      $tmp = \'\';      $i=0;$j=0; $k = 0;      for ($i=0; $i<strlen($txt); $i++) {          $k = $k == strlen($mdKey) ? 0 : $k;          $j = strpos($chars,$txt[$i])-$nh - ord($mdKey[$k++]);          while ($j<0) $j+=64;          $tmp .= $chars[$j];      }      return trim(base64_decode($tmp),$key);  }  ?> 

4.方法

<?PHP  function passport_encrypt($txt, $key = \'liiu\') {       srand((double)microtime() * 1000000);       $encrypt_key = md5(rand(0, 32000));       $ctr = 0;       $tmp = \'\';       for($i = 0;$i < strlen($txt); $i++) {       $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;       $tmp .= $encrypt_key[$ctr].($txt[$i] ^ $encrypt_key[$ctr++]);       }       return urlencode(base64_encode(passport_key($tmp, $key)));   }   function passport_decrypt($txt, $key = \'liiu\') {       $txt = passport_key(base64_decode(urldecode($txt)), $key);       $tmp = \'\';       for($i = 0;$i < strlen($txt); $i++) {       $md5 = $txt[$i];       $tmp .= $txt[++$i] ^ $md5;       }       return $tmp;   }   function passport_key($txt, $encrypt_key) {       $encrypt_key = md5($encrypt_key);       $ctr = 0;       $tmp = \'\';       for($i = 0; $i < strlen($txt); $i++) {       $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;       $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];       }       return $tmp;   }   $txt = \"1\";   $key = \"testkey\";   $encrypt = passport_encrypt($txt,$key);   $decrypt = passport_decrypt($encrypt,$key);   echo $encrypt.\"<br>\";   echo $decrypt.\"<br>\";   ?>   

5.方法

<?PHP  //函数authcode($string, $operation, $key, $expiry)中的$string：字符串，明文或密文；$operation：DECODE表示解密，其它表示加密；$key：密匙；$expiry：密文有效期。  function authcode($string, $operation = \'DECODE\', $key = \'\', $expiry = 0) {         // 动态密匙长度，相同的明文会生成不同密文就是依靠动态密匙         $ckey_length = 4;         // 密匙         $key = md5($key ? $key : $GLOBALS[\'discuz_auth_key\']);         // 密匙a会参与加解密         $keya = md5(substr($key, 0, 16));         // 密匙b会用来做数据完整性验证         $keyb = md5(substr($key, 16, 16));         // 密匙c用于变化生成的密文         $keyc = $ckey_length ? ($operation == \'DECODE\' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : \'\';         // 参与运算的密匙         $cryptkey = $keya.md5($keya.$keyc);         $key_length = strlen($cryptkey);         // 明文，前10位用来保存时间戳，解密时验证数据有效性，10到26位用来保存$keyb(密匙b)，       //解密时会通过这个密匙验证数据完整性         // 如果是解码的话，会从第$ckey_length位开始，因为密文前$ckey_length位保存 动态密匙，以保证解密正确         $string = $operation == \'DECODE\' ? base64_decode(substr($string, $ckey_length)) :  sprintf(\'%010d\', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;         $string_length = strlen($string);         $result = \'\';         $Box = range(0, 255);         $rndkey = array();         // 产生密匙簿         for($i = 0; $i <= 255; $i++) {             $rndkey[$i] = ord($cryptkey[$i % $key_length]);         }         // 用固定的算法，打乱密匙簿，增加随机性，好像很复杂，实际上对并不会增加密文的强度         for($j = $i = 0; $i < 256; $i++) {             $j = ($j + $Box[$i] + $rndkey[$i]) % 256;             $tmp = $Box[$i];             $Box[$i] = $Box[$j];             $Box[$j] = $tmp;         }         // 核心加解密部分         for($a = $j = $i = 0; $i < $string_length; $i++) {             $a = ($a + 1) % 256;             $j = ($j + $Box[$a]) % 256;             $tmp = $Box[$a];             $Box[$a] = $Box[$j];             $Box[$j] = $tmp;             // 从密匙簿得出密匙进行异或，再转成字符             $result .= chr(ord($string[$i]) ^ ($Box[($Box[$a] + $Box[$j]) % 256]));         }         if($operation == \'DECODE\') {            // 验证数据有效性，请看未加密明文的格式             if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) &&  substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {                 return substr($result, 26);             } else {                 return \'\';             }         } else {             // 把动态密匙保存在密文里，这也是为什么同样的明文，生产不同密文后能解密的原因             // 因为加密后的密文可能是一些特殊字符，复制过程可能会丢失，所以用base64编码             return $keyc.str_replace(\'=\', \'\', base64_encode($result));         }     }   $str = \'abcdef\';   $key = \'www.helloweba.com\';   echo authcode($str,\'ENCODE\',$key,0); //加密   $str = \'56f4yER1DI2WTzWMqsfPpS9hwyoJnFP2MpC8SOhRrxO7BOk\';   echo authcode($str,\'DECODE\',$key,0); //解密   ?> 

6.方法

<?PHP  //函数encrypt($string,$operation,$key)中$string：需要加密解密的字符串；$operation：判断是加密还是解密，E表示加密，D表示解密；$key：密匙。  function encrypt($string,$operation,$key=\'\'){       $key=md5($key);       $key_length=strlen($key);         $string=$operation==\'D\'?base64_decode($string):substr(md5($string.$key),0,8).$string;       $string_length=strlen($string);       $rndkey=$Box=array();       $result=\'\';       for($i=0;$i<=255;$i++){              $rndkey[$i]=ord($key[$i%$key_length]);           $Box[$i]=$i;       }       for($j=$i=0;$i<256;$i++){           $j=($j+$Box[$i]+$rndkey[$i])%256;           $tmp=$Box[$i];           $Box[$i]=$Box[$j];           $Box[$j]=$tmp;       }       for($a=$j=$i=0;$i<$string_length;$i++){           $a=($a+1)%256;           $j=($j+$Box[$a])%256;           $tmp=$Box[$a];           $Box[$a]=$Box[$j];           $Box[$j]=$tmp;           $result.=chr(ord($string[$i])^($Box[($Box[$a]+$Box[$j])%256]));       }       if($operation==\'D\'){           if(substr($result,0,8)==substr(md5(substr($result,8).$key),0,8)){               return substr($result,8);           }else{               return\'\';           }       }else{           return str_replace(\'=\',\'\',base64_encode($result));       }   }   $str = \'abc\';   $key = \'www.helloweba.com\';   $token = encrypt($str, \'E\', $key);   echo \'加密:\'.encrypt($str, \'E\', $key);   echo \'解密：\'.encrypt($str, \'D\', $key);  ?>  

7.方法

<?PHP/** * DES加密解密 */class Mcrypt{    public function __construct(){}    function getSKey($msg) {        if(!$msg) {            dIE(\'请输入参数值\');        }        /* 打开加密算法和模式 */        $td = mcrypt_module_open(\'des\', \'\', \'ecb\', \'\');        /* 创建初始向量，并且检测密钥长度。 windows 平台请使用 MCRYPT_RAND。 */        $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_DEV_RANDOM);        $ks = mcrypt_enc_get_key_size($td);        /* 创建密钥 */        $key = substr(md5($msg), 0, $ks);        /* 并且关闭模块 */        mcrypt_module_close($td);        return $key;    }    /**     *     * 加密函数     * 算法：des     * 加密模式：ecb     * 补齐方法：PKCS5     *     * @param unkNown_type $input     */    public function encryptDesEcbPKCS5($input, $key)    {        $size = mcrypt_get_block_size(\'des\', \'ecb\');        $input = $this->pkcs5_pad($input, $size);        $td = mcrypt_module_open(\'des\', \'\', \'ecb\', \'\');        //获取密钥的最大长度        $ks = mcrypt_enc_get_key_size($td);        $key = substr($key, 0, $ks);        //加密向量值        $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);        //$iv =0;        $tmp = mcrypt_generic_init($td, $key, $iv);        $data = mcrypt_generic ($td, $input);        mcrypt_generic_deinit($td);        mcrypt_module_close($td);        return $data;    }    /**     * 解密函数     * 算法：des     * 加密模式：ecb     * 补齐方法：PKCS5     * @param unkNown_type $input     */    public function decryptDesEcbPKCS5($input, $key)    {        $size = mcrypt_get_block_size(\'des\', \'ecb\');        $td = mcrypt_module_open(\'des\', \'\', \'ecb\', \'\');        /*获取密钥的最大长度*/        $ks = mcrypt_enc_get_key_size($td);        $key = substr($key, 0, $ks);        $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);        mcrypt_generic_init($td, $key, $iv);        $data = mdecrypt_generic($td, $input);        mcrypt_generic_deinit($td);        mcrypt_module_close($td);        $data = $this->pkcs5_unpad($data, $size);        return $data;    }    private function pkcs5_pad($text, $blocksize)    {        $pad = $blocksize - (strlen($text) % $blocksize);        return $text . str_repeat(chr($pad), $pad);    }    private function pkcs5_unpad($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);    }}

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