<?php
/**
* rc4,解密方法直接再一次加密就是解密
* @param [type] $data 要加密的数据
* @param [type] $pwd 加密使用的 key
* @return [type] [description]
*/
function rc4($data, $pwd) {
$key[] = "";
$box[] = "";
$pwd_length = strlen($pwd);
$data_length = strlen($data);
$cipher = '';
for ($i = 0; $i < 256; $i++) {
$key[$i] = ord($pwd[$i % $pwd_length]);
$box[$i] = $i;
}
for ($j = $i = 0; $i < 256; $i++) {
$j = ($j + $box[$i] + $key[$i]) % 256;
$tmp = $box[$i];
$box[$i] = $box[$j];
$box[$j] = $tmp;
}
for ($a = $j = $i = 0; $i < $data_length; $i++) {
$a = ($a + 1) % 256;
$j = ($j + $box[$a]) % 256;
$tmp = $box[$a];
$box[$a] = $box[$j];
$box[$j] = $tmp;
$k = $box[(($box[$a] + $box[$j]) % 256)];
$cipher .= chr(ord($data[$i]) ^ $k);
}
return $cipher;
}
$msgkey = 'www.hackhp.com';
$enstr = base64_encode(rc4('www.hackhp.com', $msgkey));
echo "RC4 加密:";
echo "<br>";
echo $enstr;
echo "<br>";
$destr = rc4(base64_decode($enstr), $msgkey);
echo $destr;
echo "<hr>";
/**
* @FunctionName authcode
* @param [string] $string [加(解)密文本]
* @param string $operation [加/解密]
* @param string $key [密匙]
* @param int $expiry [密匙有效期]
* @return [type] [加密后的文本]
*/
function authcode($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 = 'www.hackhp.com';
$key = '123465';
$authcode = authcode($str, 'ENCODE', $key, 0); //加密
echo "authcode 加密:";
echo "<br>";
echo $authcode;
echo "<br>";
echo authcode($authcode, 'DECODE', $key); //解密
echo "<hr>";
/**
* @FunctionName 自定义加密
* @CompletionDate 2019-08-16T14:19:33+0800
* @License [BY-NC-SA/4.0/CN]
* @param string $tex [等待加密的文本]
* @param string $key [密匙]
* @param string $type [解密/加密]
* @return string [description]
*/
function encode_pass($tex, $key = '123456', $type = "encode") {
$chrArr = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
if ($type == "decode") {
if (strlen($tex) < 14) {
return false;
}
$verity_str = substr($tex, 0, 8);
$tex = substr($tex, 8);
if ($verity_str != substr(md5($tex), 0, 8)) {
//完整性验证失败
return false;
}
}
$key_b = $type == "decode" ? substr($tex, 0, 6) : $chrArr[rand() % 62] . $chrArr[rand() % 62] . $chrArr[rand() % 62] . $chrArr[rand() % 62] . $chrArr[rand() % 62] . $chrArr[rand() % 62];
$rand_key = $key_b . $key;
$rand_key = md5($rand_key);
$tex = $type == "decode" ? base64_decode(substr($tex, 6)) : $tex;
$texlen = strlen($tex);
$reslutstr = "";
for ($i = 0; $i < $texlen; $i++) {
$reslutstr .= $tex[$i] ^ $rand_key[$i % 32];
}
if ($type != "decode") {
$reslutstr = trim($key_b . base64_encode($reslutstr), "==");
$reslutstr = substr(md5($reslutstr), 0, 8) . $reslutstr;
}
return $reslutstr;
}
$str = 'www.hackhp.com';
$key = '123465';
$enpass = encode_pass($str, $key); //加密
echo "自定义加密:";
echo "<br>";
echo $enpass;
echo "<br>";
echo encode_pass($enpass, $key, 'decode'); //解密
echo "<hr>";
/*************自定义加密二***************/
/**
* @param $data 要加密的字符串
* @param $key 密钥
* @return string
*/
function encrypt($data, $key = 'encrypt') {
$key = md5($key);
$x = 0;
$len = strlen($data);
$l = strlen($key);
$char = '';
for ($i = 0; $i < $len; $i++) {
if ($x == $l) {
$x = 0;
}
$char .= $key[$x];
$x++;
}
$str = '';
for ($i = 0; $i < $len; $i++) {
$str .= chr(ord($data[$i]) + (ord($char[$i])) % 256);
}
return base64_encode($str);
}
/**
* @param $data 要解密的字符串
* @param $key 密钥
* @return string
*/
function decrypt($data, $key = 'encrypt') {
$key = md5($key);
$x = 0;
$data = base64_decode($data);
$len = strlen($data);
$l = strlen($key);
$char = '';
for ($i = 0; $i < $len; $i++) {
if ($x == $l) {
$x = 0;
}
$char .= substr($key, $x, 1);
$x++;
}
$str = '';
for ($i = 0; $i < $len; $i++) {
if (ord(substr($data, $i, 1)) < ord(substr($char, $i, 1))) {
$str .= chr((ord(substr($data, $i, 1)) + 256) - ord(substr($char, $i, 1)));
} else {
$str .= chr(ord(substr($data, $i, 1)) - ord(substr($char, $i, 1)));
}
}
return $str;
}
$str = 'www.hackhp.com';
$key = '123465';
$encode = encrypt($str);
echo "自定义加密二:";
echo "<br>";
echo $encode;
echo "<br>";
$decode = decrypt($encode);
echo $decode; // 加密字符串
echo "<hr>";
/*************自定义加密三****************/
/**
* @param $string 要加密/解密的字符串
* @param $operation 类型，E 加密；D 解密
* @param string $key 密钥
* @return mixed|string
*/
function encrypts($string, $operation, $key = 'encrypt') {
$key = md5($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 = 'www.hackhp.com';
$key = '123465';
$encode = encrypts($str, 'E');
echo "自定义加密三:";
echo "<br>";
echo $encode;
echo "<br>";
$decode = encrypts($encode, 'D');
echo $decode; // 加密字符串
echo "<hr>";
/*************自定义加密四****************/
/**
*
* @Param mixed $txt 需要加密的数据
* @param string $key 密钥
* @Return string 返回加密结果
*/
function encrypt($txt, $key = '') {
if (empty($txt)) return $txt;
if (is_array($txt)) $txt = serialize($txt);
if (empty($key)) $key = md5('MD5_KEY');
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.";
$ikey ="-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm";
$nh1 = rand(0,64);
$nh2 = rand(0,64);
$nh3 = rand(0,64);
$ch1 = $chars{$nh1};
$ch2 = $chars{$nh2};
$ch3 = $chars{$nh3};
$nhnum = $nh1 + $nh2 + $nh3;
$knum = 0;$i = 0;
while(isset($key{$i})) $knum +=ord($key{$i++});
$mdKey = substr(md5(md5(md5($key.$ch1).$ch2.$ikey).$ch3),$nhnum%8,$knum%8 + 16);
$txt = base64_encode(time().'_'.$txt);
$txt = str_replace(array('+','/','='),array('-','_','.'),$txt);
$tmp = '';
$j=0;$k = 0;
$tlen = strlen($txt);
$klen = strlen($mdKey);
for ($i=0; $i<$tlen; $i++) {
$k = $k == $klen ? 0 : $k;
$j = ($nhnum+strpos($chars,$txt{$i})+ord($mdKey{$k++}))%64;
$tmp .= $chars{$j};
}
$tmplen = strlen($tmp);
$tmp = substr_replace($tmp,$ch3,$nh2 % ++$tmplen,0);
$tmp = substr_replace($tmp,$ch2,$nh1 % ++$tmplen,0);
$tmp = substr_replace($tmp,$ch1,$knum % ++$tmplen,0);
return $tmp;
}
/**
* 解密函数
* @param string $txt 需要解密的字符串
* @param string $key 密匙
* @return string 字符串类型的返回结果
*/
function decrypt($txt, $key = '', $ttl = 0) {
if (empty($txt)) return $txt;
if (empty($key)) $key = md5('MD5_KEY');
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.";
$ikey = "-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm";
$knum = 0;$i = 0;
$tlen = @strlen($txt);
while(isset($key{$i})) $knum +=ord($key{$i++});
$ch1 = @$txt{$knum % $tlen};
$nh1 = strpos($chars,$ch1);
$txt = @substr_replace($txt,'',$knum % $tlen--,1);
$ch2 = @$txt{$nh1 % $tlen};
$nh2 = @strpos($chars,$ch2);
$txt = @substr_replace($txt,'',$nh1 % $tlen--,1);
$ch3 = @$txt{$nh2 % $tlen};
$nh3 = @strpos($chars,$ch3);
$txt = @substr_replace($txt,'',$nh2 % $tlen--,1);
$nhnum = $nh1 + $nh2 + $nh3;
$mdKey = substr(md5(md5(md5($key.$ch1).$ch2.$ikey).$ch3),$nhnum % 8,$knum % 8 + 16);
$tmp = '';
$j = 0; $k = 0;
$tlen = @strlen($txt);
$klen = @strlen($mdKey);
for ($i=0; $i<$tlen; $i++) {
$k = $k == $klen ? 0 : $k;
$j = strpos($chars,$txt{$i})-$nhnum - ord($mdKey{$k++});
while ($j<0) $j+=64;
$tmp .= $chars{$j};
}
$tmp = str_replace(array('-','_','.'),array('+','/','='),$tmp);
$tmp = trim(base64_decode($tmp));
if (preg_match("/\d{10}_/s",substr($tmp,0,11))){
if ($ttl > 0 && (time() - substr($tmp,0,11) > $ttl)){
$tmp = null;
}else{
$tmp = substr($tmp,11);
}
}
//解密出来后先反序列化看是否是一个数组信息
$res = unserialize($tmp);
if($res){
return $res;
}else{
return $tmp;
}
}
?>
评论
171条评论18045757615 Lv.1
Chrome 108.0.5359.95 
Windows 7 x64 Edition 回复
感谢楼主
，好人一生平安
云南省昭通市 联通
1 Lv.1
Chrome 111.0.0.0 
Windows 回复
很棒！
河南省驻马店市 联通
dadad Lv.1
Chrome 109.0.0.0 
Windows 回复
丢你鸽嘿
广东省佛山市南海区 联通
2546124371 Lv.1
Internet Explorer 
iPhone iOS 16.3 回复
666
广西玉林市 电信
67575 Lv.1
Chrome 87.0.4280.141 
Android 13 回复
收拾书包睡吧睡吧睡吧睡吧
广西 联通
a Lv.1
Firefox 111.0 
Windows 7 x64 Edition 回复
阿猪66
河南省郑州市 联通
优游卒岁 Lv.1
Chrome 101.0.4951.74 
Android 13 回复
你好你好
广西河池市 联通
dhrt Lv.1
Chrome 110.0.0.0 
Windows 回复
感谢楼主表情，好人一生平安感谢楼主表情，好人一生平安感谢楼主表情，好人一生平安
湖北省宜昌市 联通
yifei Lv.1
Chrome 110.0.0.0 
Windows 回复
河南省郑州市 联通
zhishi Lv.1
Chrome 110.0.0.0 
Windows 回复
感谢楼主表情，好人一生平安感谢楼主表情，好人一生平安感谢楼主表情，好人一生平安
湖北省黄石市 电信