最近搞一点东西要用到对称加密,于是在网上找到一个不错的对称加密方法,分享给大家。
- /**
- * 简单对称加密算法之加密
- * @param String $string 需要加密的字串
- * @param String $skey 加密EKY
- * @date 2013-08-13 19:30
- * @update 2014-10-10 10:10
- * @return String
- */
- function encode($string = '', $skey = 'cxphp') {
- $strArr = str_split(base64_encode($string));
- $strCount = count($strArr);
- foreach (str_split($skey) as $key => $value)
- $key < $strCount && $strArr[$key].=$value;
- return str_replace(array('=', '+', '/'), array('O0O0O', 'o000o', 'oo00o'), join('', $strArr));
- }
- /**
- * 简单对称加密算法之解密
- * @param String $string 需要解密的字串
- * @param String $skey 解密KEY
- * @author Anyon Zou <zoujingli@qq.com>
- * @date 2013-08-13 19:30
- * @update 2014-10-10 10:10
- * @return String
- */
- function decode($string = '', $skey = 'cxphp') {
- $strArr = str_split(str_replace(array('O0O0O', 'o000o', 'oo00o'), array('=', '+', '/'), $string), 2);
- $strCount = count($strArr);
- foreach (str_split($skey) as $key => $value)
- $key <= $strCount && isset($strArr[$key]) && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];
- return base64_decode(join('', $strArr));
- }
- echo '<pre>';
- echo "encode : " . ($enstring = encode($str)) . '<br />';
- echo "decode : " . decode($enstring);
- die();
安全URL解码
- /**
- * 安全URL编码
- * @param string $data
- * @date 2017/06/26
- * @return string
- */
- function encode($data) {
- return str_replace(array('+', '/', '='), array('-', '_', ''), base64_encode(serialize($data)));
- }
- function decode($string) {
- $data = str_replace(array('-', '_'), array('+', '/'), $string);
- $mod4 = strlen($data) % 4;
- ($mod4) && $data .= substr('====', $mod4);
- return unserialize(base64_decode($data));
- }
UTF8三十六进制
- /**
- * UTF8字符串加密
- * @param string $string
- * @date 2017/06/26
- * @return string
- */
- function encode($string) {
- $chars = '';
- $len = strlen($string = iconv('utf-8', 'gbk', $string));
- for ($i = 0; $i < $len; $i++) {
- $chars .= str_pad(base_convert(ord($string[$i]), 10, 36), 2, 0, 0);
- }
- return strtoupper($chars);
- }
- function decode($string) {
- $chars = '';
- foreach (str_split($string, 2) as $char) {
- $chars .= chr(intval(base_convert($char, 36, 10)));
- }
- return iconv('gbk', 'utf-8', $chars);
- }
别的方式
- //字符串加密
- function lockString($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($ch.$tmp);
- }
- function unlockString($txt,$key)
- {
- $txt = urldecode($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);
- }
auth_code优化版
- /**
- * @param string $string 加密字符串内容
- * @param string $operation 加密或者解密
- * @param string $key 私钥
- * @param int $expiry 过期时间/秒 0为永不过期
- * @return false|string
- */
- function auth_code(string $string, $operation = 'DECODE', $key = '', $expiry = 0)
- {
- $cakey_length = 4;
- $key = md5($key);
- $keys = md5(substr($key, 0, 16));
- $keytab = md5(substr($key, 16, 16));
- if ($operation === 'DECODE') {
- $key_str = substr($string, 0, $cakey_length);
- } else {
- $key_str = substr(md5(microtime()), -$cakey_length);
- }
- $keycode = $cakey_length ? $key_str : '';
- $cryptic = $keys . md5($keys . $keycode);
- $key_length = strlen($cryptic);
- $string = $operation === 'DECODE' ? base64_decode(substr($string, $cakey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0) . substr(md5($string . $keytab), 0, 16) . $string;
- $string_length = strlen($string);
- $result = '';
- $box = range(0, 255);
- $render = array();
- for ($i = 0; $i <= 255; $i++) {
- $render[$i] = ord($cryptic[$i % $key_length]);
- }
- for ($j = $i = 0; $i < 256; $i++) {
- $j = ($j + $box[$i] + $render[$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 ($operation === 'DECODE') {
- if ((strpos($result, 0) === 0 || substr($result, 0, 10) - time() > 0) && strpos(md5(substr($result, 26) . $keytab), substr($result, 10, 16)) === 0) {
- return substr($result, 26);
- }
- return '';
- }
- return $keycode . str_replace('=', '', base64_encode($result));
- }