分享几种PHP加密/解密的方法+附带代码

分享几种PHP加密/解密的方法+附带代码 PHP教程 第1张

正文:

分享六种PHP加密的方法,大家可以去学习一下思路,很多在线PHP加密的平台也基本是 使用了这些思路,废话不多说,直接看代码吧。

第一种:

<?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', 'iyuanmas欢迎您',0); 
//解密:"iyuanmas欢迎您" 
echo encryptDecrypt('password', 'z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=',1); 
?>

第二种:

<?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); 
} 
?>

第三种:

<?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); 
} 

?>

第四种:

<?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>"; 

?>

第五种:

<?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'; 
$key = 'www.iyuanmas.com'; 
echo authcode($str,'ENCODE',$key,0); //加密 
$str = '56f4yER1DI2WTzWMqsfPpS9hwyoJnFP2MpC8SOhRrxO7BOk'; 
echo authcode($str,'DECODE',$key,0); //解密 
?>

第六种:

<?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.iyuanmas.com'; 
$token = encrypt($str, 'E', $key); 
echo '加密:'.encrypt($str, 'E', $key); 
echo '解密:'.encrypt($str, 'D', $key); 
?>

本文结束