Yii 2.0 支付宝支付扩展 [ 2.0 版本 ]

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018-12-07
 * Time: 3:05 PM
 * Author: 王称意
 * QQ/Email: 984008813/wondely@126.com
 */
namespace  app\service;

class AliPay {

    public $gatewayUrl = 'https://openapi.alipay.com/gateway.do';

    public $postCharset = "UTF-8";

    public $fileCharset = "UTF-8";

    public $rsaPrivateKeyFilePath = '';

    public $rsaPrivateKey = '';

    public $alipayPublicKey = '';

    public $alipayrsaPublicKey = '';

    public $signType = "RSA2";

    public $version = '1.0';

    public $format = 'json';

    public $alipay_sdk = 'alipay-sdk-php-20180705';

    public function pageExecute($params)
    {

    }

    public  function buildRequestForm($para_temp) {

        $sHtml = "<form id='alipaysubmit' name='alipaysubmit' action='".$this->gatewayUrl."?charset=".trim($this->postCharset)."' method='POST'>";
       foreach($para_temp as $key=>$val) {
            if (false === $this->checkEmpty($val)) {
                $val = $this->characet($val, $this->postCharset);
                $val = str_replace("'","&apos;",$val);
                //$val = str_replace("\"","&quot;",$val);
                $sHtml.= "<input type='hidden' name='".$key."' value='".$val."'/>";
            }
        }

        //submit按钮控件请不要含有name属性
        $sHtml = $sHtml."<input type='submit' value='ok' style='display:none;''></form>";

        $sHtml = $sHtml."<script>document.forms['alipaysubmit'].submit();</script>";

        return $sHtml;
    }

    public function checkEmpty($value) {
        if (!isset($value))
            return true;
        if ($value === null)
            return true;
        if (trim($value) === "")
            return true;

        return false;
    }

    public function getSignContent($params) {
        ksort($params);
        $stringToBeSigned = "";
        $i = 0;
        foreach ($params as $k => $v) {
            if (false === $this->checkEmpty($v) && "@" != substr($v, 0, 1)) {
                // 转换成目标字符集
                $v = $this->characet($v, $this->postCharset);
                if ($i == 0) {
                    $stringToBeSigned .= "$k" . "=" . "$v";
                } else {
                    $stringToBeSigned .= "&" . "$k" . "=" . "$v";
                }
                $i++;
            }
        }

        unset ($k, $v);
        return $stringToBeSigned;
    }

    /**
     * 转换字符集编码
     * @param $data
     * @param $targetCharset
     * @return string
     */
    public function characet($data, $targetCharset) {
        if(!empty($data)) {
            $fileType = $this->fileCharset;
            if (strcasecmp($fileType, $targetCharset) != 0) {
                $data = mb_convert_encoding($data, $targetCharset, $fileType);
                //$data = iconv($fileType, $targetCharset.'//IGNORE', $data);
            }
        }
        return $data;
    }

    public function generateSign($params, $signType = "RSA") {
        return $this->sign($this->getSignContent($params), $signType);
    }

    public function sign($data, $signType = "RSA") {
        if($this->checkEmpty($this->rsaPrivateKeyFilePath)){
            $priKey=$this->rsaPrivateKey;
            $res = "-----BEGIN RSA PRIVATE KEY-----\n" .
                wordwrap($priKey, 64, "\n", true) .
                "\n-----END RSA PRIVATE KEY-----";
        }else {
            $priKey = file_get_contents($this->rsaPrivateKeyFilePath);
            $res = openssl_get_privatekey($priKey);
        }

        ($res) or die('您使用的私钥格式错误，请检查RSA私钥配置');

        if ("RSA2" == $signType) {
            openssl_sign($data, $sign, $res, OPENSSL_ALGO_SHA256);
        } else {
            openssl_sign($data, $sign, $res);
        }

        if(!$this->checkEmpty($this->rsaPrivateKeyFilePath)){
            openssl_free_key($res);
        }
        $sign = base64_encode($sign);
        return $sign;
    }

    /** rsaCheckV1 & rsaCheckV2
     *  验证签名
     *  在使用本方法前，必须初始化AopClient且传入公钥参数。
     *  公钥是否是读取字符串还是读取文件，是根据初始化传入的值判断的。
     **/
    public function rsaCheckV1($params, $rsaPublicKeyFilePath,$signType='RSA') {
        $sign = $params['sign'];
        $params['sign_type'] = null;
        $params['sign'] = null;
        return $this->verify($this->getSignContent($params), $sign, $rsaPublicKeyFilePath,$signType);
    }

    public function rsaCheckV2($params, $rsaPublicKeyFilePath, $signType='RSA') {
        $sign = $params['sign'];
        $params['sign'] = null;
        return $this->verify($this->getSignContent($params), $sign, $rsaPublicKeyFilePath, $signType);
    }

    public function verify($data, $sign, $rsaPublicKeyFilePath, $signType = 'RSA') {

        if($this->checkEmpty($this->alipayPublicKey)){

            $pubKey= $this->alipayrsaPublicKey;
            $res = "-----BEGIN PUBLIC KEY-----\n" .
                wordwrap($pubKey, 64, "\n", true) .
                "\n-----END PUBLIC KEY-----";
        }else {
            //读取公钥文件
            $pubKey = file_get_contents($rsaPublicKeyFilePath);
            //转换为openssl格式密钥
            $res = openssl_get_publickey($pubKey);
        }

        ($res) or die('支付宝RSA公钥错误。请检查公钥文件格式是否正确');

        //调用openssl内置方法验签，返回bool值

        $result = FALSE;
        if ("RSA2" == $signType) {
            $result = (openssl_verify($data, base64_decode($sign), $res, OPENSSL_ALGO_SHA256)===1);
        } else {
            $result = (openssl_verify($data, base64_decode($sign), $res)===1);
        }

        if(!$this->checkEmpty($this->alipayPublicKey)) {
            //释放资源
            openssl_free_key($res);
        }

        return $result;
    }

}