<?php
namespace Payment\Utils; class Rc4Encrypt { protected $key; public function __construct($key) { $this->key = $key; } public function setKey($key) { $this->key = $key; } public function encrypt($data) { $cipher = $box[] = $key[] = ''; $pwd_length = strlen($this->key); $data_length = strlen($data); for ($i = 0; $i < 256; $i++) { $key[$i] = ord($this->key[$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]) ^ $k); } return strtoupper(StrUtil::String2Hex($cipher)); } } 