payment/app/Helper/Efps/Signer.php

<?php

namespace App\Helper\Efps;

use App\Exception\BusinessException;
use App\Helper\StringHelper;

class Signer
{
    protected static $env = 'prod';

    private static function getConfig($key)
    {
        $config = Config::get(self::$env);
        return $config ? ($config[$key] ?? null) : null;
    }

    public static function sign($data) {
        $certs = [];
        openssl_pkcs12_read(
            file_get_contents(self::getConfig('privateKeyFilePath')),
            $certs,
            self::getConfig('privateKeyPassword')
        ); //其中password为你的证书密码

        if (empty($certs)) {
            throw new BusinessException('请检查RSA私钥配置');
        }

        openssl_sign($data, $sign, $certs['pkey'],OPENSSL_ALGO_SHA256);
        $sign = base64_encode($sign);
        return $sign;
    }

    public static function verify($data, $sign) {

        //读取公钥文件
        $pubKey = file_get_contents(self::getConfig('publicKeyFilePath'));

        $res = openssl_get_publickey($pubKey);

        if (empty($res)) {
            throw new BusinessException('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

        $result = (bool)openssl_verify($data, base64_decode($sign), $res, OPENSSL_ALGO_SHA256);
        // 释放资源
        openssl_free_key($res);

        return $result;
    }

    public static function publicEncrypt($data)
    {
        //读取公钥文件
        $pubKey = file_get_contents(self::getConfig('publicKeyFilePath'));

        $res = openssl_get_publickey($pubKey);

        if (empty($res)) {
            throw new BusinessException('RSA公钥错误, 请检查公钥文件格式是否正确');
        }
        $crypttext = "";
        openssl_public_encrypt($data,$crypttext, $res);
        openssl_free_key($res);

        return(base64_encode($crypttext));
    }
}