代码演示如下:
方法一
<?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 $encrypted; } } //加密:"z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=" echo encryptDecrypt("password", "Helloweba欢迎您",0); //解密:"Helloweba欢迎您" echo encryptDecrypt("password", "z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=",1); ?>
方法二
<?php //加密函数 function lock_url($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; $i
方法三
<?php //改进后的算法 //加密函数 function lock_url($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; $i
方法四
<?php function passport_encrypt($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."
"; echo $decrypt."
"; ?>
方法五
<?php //非常给力的authcode加密函数,Discuz!经典代码(带详解) //函数authcode($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",$key,0); //解密 ?>
方法六
<?php //函数encrypt($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); ?>
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