<?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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