~~~ /** * 加密函數 * @param string $txt 需要加密的字符串 * @return string 返回加密結果 */ function encrypt($txt) { if (!file_exists(ROOT_PATH . '/config/install.lock')) { @touch(ROOT_PATH . '/config/install.lock'); } $key = filectime(ROOT_PATH . '/config/install.lock'); if (empty($txt)) return $txt; if (empty($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; } ~~~ ~~~ /** * 解密函數 * @param string $txt 需要解密的字符串 * @return string 字符串類型的返回結果 */ function decrypt($txt, $ttl = 0) { if (empty($txt)) return $txt; $key = filectime(ROOT_PATH . '/config/install.lock'); if (empty($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); } } return $tmp; } ~~~