new_sdk_wu/www/new_sdk/extend/LdzfPay/Api/Common/RSACryptUtil.php

<?php
namespace LdzfPay\Api\Common;

use LdzfPay\Api\Common\Logger;
use LdzfPay\UmfPayService\UmfService;
use think\Config;

/**
 * RSA加解密工具类
 */
class RSACryptUtil {
    /**
     * 使用公钥对明文字符串进行加密
     * @param $data 	string 明文
     * @return string   string 密文
     */
    public static function encrypt($data) {
        // $log = new Logger ();
        //$cert_file = UmfService::$publicKeyPath;
        //$log->logInfo("[UMF SDK]公钥文件绝对路径 ".$cert_file);
        //if(!file_exists($cert_file)){
        //	$log->logInfo("[UMF SDK]传入的公钥文件不存在,公钥文件绝对路径 ".$cert_file);
        //	die("[UMF SDK]传入的公钥文件不存在,公钥文件绝对路径 ".$cert_file);
        //}
        $cert_file = Config::get('ldys_pay')['public_file'];
        $fp = fopen($cert_file,"r");
        $public_key = fread($fp,8192);
        // $public_key = UMF_PUBLIC_KEY;
        fclose($fp);
        $public_key = openssl_get_publickey($public_key);
        openssl_public_encrypt($data,$crypttext,$public_key);
        $encryptDate = base64_encode($crypttext);
        //$log->logInfo ( "[UMF SDK]敏感信息加密前明文: " . $data);
        // $log->logInfo ( "[UMF SDK]敏感信息加密后密文: " . $encryptDate);
        return $encryptDate;
    }

    /**
     * @param $data		string 密文
     * @param $merId	string 商户号
     * @return string	string 明文
     */
    public function decrypt($data,$merId) {
        // $log = new Logger ();
        $priv_key_file = UmfService::$privateKeyPath[$merId];
        // $log->logInfo("[UMF SDK]私钥文件绝对路径 ".$priv_key_file);
        if(!file_exists($priv_key_file)){
            // $log->logInfo("[UMF SDK]传入的私钥文件不存在,私钥文件绝对路径 ".$priv_key_file);
            die("[UMF SDK]传入的私钥文件不存在,私钥文件绝对路径 ".$priv_key_file);
        }
        $fp = fopen($priv_key_file,"r");
        $private_key = fread($fp,8192);
        fclose ($fp);
        $private_key = openssl_get_privatekey($private_key);
        openssl_private_decrypt(base64_decode($data), $decrypted, $private_key);
        $decryptDate = iconv("GBK", "UTF-8", $decrypted);
        // $log->logInfo ( "[UMF SDK]敏感信息解密前密文: " . $data);
        //$log->logInfo ( "[UMF SDK]敏感信息解密后明文: " . $decryptDate);
        return $decryptDate;
    }
}