Summary of PHP source code encryption methods

'); $contents = substr($contents, $headerPos + 5, $footerPos - $headerPos); $encode = base64_encode(gzdeflate($contents)); // 开始编码 $encode = '"; return file_put_contents($filename, $encode); } return false; } //调用函数 $filename = 'dam.php'; encode_file_contents($filename); echo "OK,加密完成！" ?>

\'.$'.$q1.'($'.$q3.'($'.$q4.'($'.$q2.',$'.$q5.'*2),$'.$q4.'($'.$q2.',$'.$q5.',$'.$q5.'),$'.$q4.'($'.$q2.',0,$'.$q5.'))));').'"));'; $s = ''; //echo $s; // 生成 加密后的PHP文件 $fpp1 = fopen('temp_'.$filename, 'w'); fwrite($fpp1, $s) or die('写文件错误'); ?>

setIter(32); } function setIter($n_iter) { $this->n_iter = $n_iter; } function getIter() { return $this->n_iter; } function encrypt($data, $key) { $n = $this->_resize($data, 4); $data_long[0] = $n; $n_data_long = $this->_str2long(1, $data, $data_long); $n = count($data_long); if (($n & 1) == 1) { $data_long[$n] = chr(0); $n_data_long++; } $this->_resize($key, 16, true); if ( '' == $key ) $key = '0000000000000000'; $n_key_long = $this->_str2long(0, $key, $key_long); $enc_data = ''; $w = array(0, 0); $j = 0; $k = array(0, 0, 0, 0); for ($i = 0; $i < $n_data_long; ++$i) { if ($j + 4 <= $n_key_long) { $k[0] = $key_long[$j]; $k[1] = $key_long[$j + 1]; $k[2] = $key_long[$j + 2]; $k[3] = $key_long[$j + 3]; } else { $k[0] = $key_long[$j % $n_key_long]; $k[1] = $key_long[($j + 1) % $n_key_long]; $k[2] = $key_long[($j + 2) % $n_key_long]; $k[3] = $key_long[($j + 3) % $n_key_long]; } $j = ($j + 4) % $n_key_long; $this->_encipherLong($data_long[$i], $data_long[++$i], $w, $k); $enc_data .= $this->_long2str($w[0]); $enc_data .= $this->_long2str($w[1]); } return $enc_data; } function decrypt($enc_data, $key) { $n_enc_data_long = $this->_str2long(0, $enc_data, $enc_data_long); $this->_resize($key, 16, true); if ( '' == $key ) $key = '0000000000000000'; $n_key_long = $this->_str2long(0, $key, $key_long); $data = ''; $w = array(0, 0); $j = 0; $len = 0; $k = array(0, 0, 0, 0); $pos = 0; for ($i = 0; $i < $n_enc_data_long; $i += 2) { if ($j + 4 <= $n_key_long) { $k[0] = $key_long[$j]; $k[1] = $key_long[$j + 1]; $k[2] = $key_long[$j + 2]; $k[3] = $key_long[$j + 3]; } else { $k[0] = $key_long[$j % $n_key_long]; $k[1] = $key_long[($j + 1) % $n_key_long]; $k[2] = $key_long[($j + 2) % $n_key_long]; $k[3] = $key_long[($j + 3) % $n_key_long]; } $j = ($j + 4) % $n_key_long; $this->_decipherLong($enc_data_long[$i], $enc_data_long[$i + 1], $w, $k); if (0 == $i) { $len = $w[0]; if (4 <= $len) { $data .= $this->_long2str($w[1]); } else { $data .= substr($this->_long2str($w[1]), 0, $len % 4); } } else { $pos = ($i - 1) * 4; if ($pos + 4 <= $len) { $data .= $this->_long2str($w[0]); if ($pos + 8 <= $len) { $data .= $this->_long2str($w[1]); } elseif ($pos + 4 < $len) { $data .= substr($this->_long2str($w[1]), 0, $len % 4); } } else { $data .= substr($this->_long2str($w[0]), 0, $len % 4); } } } return $data; } function _encipherLong($y, $z, &$w, &$k) { $sum = (integer) 0; $delta = 0x9E3779B9; $n = (integer) $this->n_iter; while ($n-- > 0) { $y = $this->_add($y, $this->_add($z << 4 ^ $this->_rshift($z, 5), $z) ^ $this->_add($sum, $k[$sum & 3])); $sum = $this->_add($sum, $delta); $z = $this->_add($z, $this->_add($y << 4 ^ $this->_rshift($y, 5), $y) ^ $this->_add($sum, $k[$this->_rshift($sum, 11) & 3])); } $w[0] = $y; $w[1] = $z; } function _decipherLong($y, $z, &$w, &$k) { $sum = 0xC6EF3720; $delta = 0x9E3779B9; $n = (integer) $this->n_iter; while ($n-- > 0) { $z = $this->_add($z, -($this->_add($y << 4 ^ $this->_rshift($y, 5), $y) ^ $this->_add($sum, $k[$this->_rshift($sum, 11) & 3]))); $sum = $this->_add($sum, -$delta); $y = $this->_add($y, -($this->_add($z << 4 ^ $this->_rshift($z, 5), $z) ^ $this->_add($sum, $k[$sum & 3]))); } $w[0] = $y; $w[1] = $z; } function _resize(&$data, $size, $nonull = false) { $n = strlen($data); $nmod = $n % $size; if ( 0 == $nmod ) $nmod = $size; if ($nmod > 0) { if ($nonull) { for ($i = $n; $i < $n - $nmod + $size; ++$i) { $data[$i] = $data[$i % $n]; } } else { for ($i = $n; $i < $n - $nmod + $size; ++$i) { $data[$i] = chr(0); } } } return $n; } function _hex2bin($str) { $len = strlen($str); return pack('H' . $len, $str); } function _str2long($start, &$data, &$data_long) { $n = strlen($data); $tmp = unpack('N*', $data); $j = $start; foreach ($tmp as $value) $data_long[$j++] = $value; return $j; } function _long2str($l) { return pack('N', $l); } function _rshift($integer, $n) { if (0xffffffff < $integer || -0xffffffff > $integer) { $integer = fmod($integer, 0xffffffff + 1); } if (0x7fffffff < $integer) { $integer -= 0xffffffff + 1.0; } elseif (-0x80000000 > $integer) { $integer += 0xffffffff + 1.0; } if (0 > $integer) { $integer &= 0x7fffffff; $integer >>= $n; $integer |= 1 << (31 - $n); } else { $integer >>= $n; } return $integer; } function _add($i1, $i2) { $result = 0.0; foreach (func_get_args() as $value) { if (0.0 > $value) { $value -= 1.0 + 0xffffffff; } $result += $value; } if (0xffffffff < $result || -0xffffffff > $result) { $result = fmod($result, 0xffffffff + 1); } if (0x7fffffff < $result) { $result -= 0xffffffff + 1.0; } elseif (-0x80000000 > $result) { $result += 0xffffffff + 1.0; } return $result; } } ?> 使用方法参考如下： // 加密过程 view sourceprint? $text_file = S_ROOT . './456.php'; $str = @file_get_contents($text_file); require_once S_ROOT . "./text_auth.php"; $text_auth = new text_auth(64); $str = $text_auth->encrypt($str, "qianyunlai.com"); $filename = S_ROOT . './789.php'; // 加密后的文本为二进制，普通的文本编辑器无法正常查看 file_put_contents($filename, $str); // 解密过程 view sourceprint ?01 $text_file = S_ROOT . './789.php'; $str = @file_get_contents($text_file); require_once S_ROOT . "./text_auth.php"; $text_auth = new text_auth(64); $str = $text_auth->decrypt($str, "qianyunlai.com"); $filename = S_ROOT . './456.php'; file_put_contents($filename, $str);