333 lines
7.6 KiB
PHP
333 lines
7.6 KiB
PHP
<?php
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/**
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* Created by PhpStorm.
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* User: dingran
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* Date: 2020/3/2
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* Time: 下午2:19
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*/
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namespace app\common\services;
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class ApiSign
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{
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/** 请求网关 */
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private $gateway = '';
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/** 密钥 */
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private $key;
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/** 平台标识码 */
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private $unique_code;
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/** 请求的参数 */
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private $parameters;
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private $sign_type = 'MD5';
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public function __construct()
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{
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}
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public function setGateWay($gateWay)
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{
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$this->gateway = $gateWay;
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return $this;
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}
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public function setKey($key)
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{
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$this->key = $key;
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return $this;
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}
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public function setUniqueCode($code)
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{
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$this->unique_code = $code;
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return $this;
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}
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public function setSignType($signType)
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{
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$this->sign_type = $signType;
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return $this;
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}
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/**
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*获取参数值
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*/
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function getParameter($parameter) {
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return isset($this->parameters[$parameter]) ? $this->parameters[$parameter] : '';
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}
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/**
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*设置参数值
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*/
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function setParameter($parameter, $parameterValue) {
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$this->parameters[$parameter] = $parameterValue;
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}
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/**
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* 一次性设置参数
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*/
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function setReqParams($post, $filterField = null){
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if($filterField !== null){
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forEach($filterField as $k=>$v){
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unset($post[$v]);
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}
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}
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//判断是否存在空值，空值不提交
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forEach($post as $k=>$v){
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if(empty($v)){
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unset($post[$k]);
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}
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}
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$this->parameters = $post;
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}
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/**
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*获取所有请求的参数
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*@return array
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*/
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function getAllParameters() {
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return $this->parameters;
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}
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/**
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* 取得链接
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*/
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public function getLink()
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{
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$para = $this->buildRequestPara();
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return $this->gateway . '?' . $this->createLinkstringUrlencode($para);
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}
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/**
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* 验证消息是否是合法消息
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*/
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public function verify()
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{
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// 判断请求是否为空
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if (empty($_POST) && empty($_GET)) {
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return false;
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}
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$data = $_POST ?: $_GET;
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$this->setReqParams($data);
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// 生成签名结果
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$is_sign = $this->getSignVeryfy($data['sign']);
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if ($is_sign) {
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return true;
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} else {
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return false;
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}
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}
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/**
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* 生成要请求的参数数组
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* @param $para_temp 请求前的参数数组
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* @return 要请求的参数数组
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*/
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private function buildRequestPara()
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{
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//除去待签名参数数组中的空值和签名参数
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$para_filter = $this->paraFilter();
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//对待签名参数数组排序
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$para_sort = $this->argSort($para_filter);
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//生成签名结果
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$mysign = $this->buildRequestMysign($para_sort);
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//签名结果与签名方式加入请求提交参数组中
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$para_sort['sign'] = $mysign;
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return $para_sort;
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}
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/**
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* 生成签名
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* @param $para_temp 请求前的参数数组
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* @return 签名
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*/
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public function generateSign()
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{
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//除去待签名参数数组中的空值和签名参数
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$para_filter = $this->paraFilter();
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//对待签名参数数组排序
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$para_sort = $this->argSort($para_filter);
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//生成签名结果
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$mysign = $this->buildRequestMysign($para_sort);
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return $mysign;
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}
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/**
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* 除去数组中的空值和签名参数
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* @param $para 签名参数组
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* return 去掉空值与签名参数后的新签名参数组
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*/
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private function paraFilter()
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{
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$para_filter = array();
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foreach($this->parameters as $k => $v) {
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if("" != $v && "sign" != $k) {
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$para_filter[$k] = $v;
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}
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}
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return $para_filter;
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}
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/**
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* 对数组排序
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* @param $para 排序前的数组
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* return 排序后的数组
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*/
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private function argSort($para)
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{
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ksort($para);
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reset($para);
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return $para;
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}
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/**
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* 生成签名结果
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* @param $para_sort 已排序要签名的数组
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* return 签名结果字符串
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*/
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private function buildRequestMysign($para_sort)
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{
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//把数组所有元素，按照“参数=参数值”的模式用“&”字符拼接成字符串
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$prestr = $this->createLinkstring($para_sort);
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$mysign = '';
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switch (strtoupper(trim($this->sign_type))) {
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case 'MD5':
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$mysign = $this->md5Sign($prestr, $this->key);
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break;
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default:
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$mysign = '';
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}
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return $mysign;
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}
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/**
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* 把数组所有元素，按照“参数=参数值”的模式用“&”字符拼接成字符串
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* @param $para 需要拼接的数组
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* return 拼接完成以后的字符串
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*/
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private function createLinkstring($para)
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{
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$arg = '';
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foreach ($para as $key => $val) {
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$arg .= $key . '=' . urlencode($val) . '&';
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}
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//去掉最后一个&字符
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$arg = substr($arg, 0, count($arg) - 2);
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//如果存在转义字符，那么去掉转义
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if (get_magic_quotes_gpc()) {
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$arg = stripslashes($arg);
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}
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return $arg;
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}
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/**
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* 把数组所有元素，按照“参数=参数值”的模式用“&”字符拼接成字符串，并对字符串做urlencode编码
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* @param $para 需要拼接的数组
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* return 拼接完成以后的字符串
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*/
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private function createLinkstringUrlencode($para)
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{
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$arg = '';
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foreach ($para as $key => $val) {
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$arg .= $key . '=' . urlencode($val) . '&';
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}
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//去掉最后一个&字符
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$arg = substr($arg, 0, count($arg) - 2);
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//如果存在转义字符，那么去掉转义
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if (get_magic_quotes_gpc()) {
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$arg = stripslashes($arg);
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}
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return $arg;
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}
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/**
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* 签名字符串
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* @param $prestr 需要签名的字符串
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* @param $key 私钥
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* return 签名结果
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*/
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private function md5Sign($prestr, $key)
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{
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$prestr = $prestr . $key;
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return md5($prestr);
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}
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/**
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* 验证签名
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* @param $prestr 需要签名的字符串
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* @param $sign 签名结果
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* @param $key 私钥
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* return 签名结果
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*/
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private function md5Verify($prestr, $sign, $key)
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{
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$prestr = $prestr . $key;
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$mysgin = md5($prestr);
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if ($mysgin == $sign) {
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return true;
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} else {
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return false;
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}
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}
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/**
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* 获取返回时的签名验证结果
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* @param $para_temp 通知返回来的参数数组
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* @param $sign 返回的签名结果
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* @return bool 签名验证结果
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*/
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public function getSignVeryfy($sign)
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{
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//除去待签名参数数组中的空值和签名参数
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$para_filter = $this->paraFilter();
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//对待签名参数数组排序
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$para_sort = $this->argSort($para_filter);
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//把数组所有元素，按照“参数=参数值”的模式用“&”字符拼接成字符串
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$prestr = $this->createLinkstring($para_sort);
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$is_sgin = false;
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$key = $this->unique_code ? $this->key.$this->unique_code : $this->key;
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switch (strtoupper(trim($this->sign_type))) {
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case 'MD5':
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$is_sgin = $this->md5Verify($prestr, $sign, $key);
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break;
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default:
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$is_sgin = false;
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}
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return $is_sgin;
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}
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} |