RSA数据加密解密

<?php
//定义常量
        define("INVOICE_PRINT_URL", '');
        define("MERCHANT_ID", '');
        define("MERCHANT_SECRET", '');
        define("PLATFORM_PUBLIC_KEY", '');
        define("MERCHANT_PUBLIC_KEY", '');
        define("MERCHANT_PRIVATE_KEY", $'');
        define("ACCOUNT_VALUE", '');

        const KEYSIZE = 2048;//密钥长度

<?php

    /**
     * @FuncName:getPlatformPublicKey
     * @Description 获取平台公钥
     * @User ZHaoGuiBin
     * @Date 2020-08-17 8:29
     * @return false|resource
     */
    private static function getPlatformPublicKey()
    {
        return openssl_pkey_get_public(PLATFORM_PUBLIC_KEY);
    }


    /**
     * @FuncName:getMerchantPrivateKey
     * @Description 获取商户私钥
     * @User ZHaoGuiBin
     * @Date 2020-08-17 8:29
     * @return false|resource
     */
    private static function getMerchantPrivateKey()
    {
        return openssl_pkey_get_private(MERCHANT_PRIVATE_KEY);
    }

        /**
     * @FuncName:getMerchantPublicKey
     * @Description 获取商户公钥
     * @User ZHaoGuiBin
     * @Date 2020-08-17 8:29
     * @return false|resource
     */
    private static function getMerchantPublicKey()
    {
        return openssl_pkey_get_public(MERCHANT_PUBLIC_KEY);
    }

        /**
     * @FuncName:sslPublicEncrypt
     * @Description 公钥加密数据
     * @User ZHaoGuiBin
     * @Date 2020-08-14 10:42
     * @param $source_data
     * @return array
     */
    private static function sslPublicEncrypt($source_data)
    {

        if (!$source_data) {
            return ['code' => 500, 'message' => '加密数据为空'];
        }

        $data = "";
        $key = self::getPlatformPublicKey();

        if (!$key) {
            return ['code' => 500, 'message' => '平台密钥不正确，请检查平台密钥配置'];
        }

        $dataArray = str_split($source_data, self::KEYSIZE / 8 - 11); //加密最长长度为(self::KEYSIZE / 8 - 11)

        foreach ($dataArray as $value) {
            $res = openssl_public_encrypt($value, $encryptedTemp, $key);
            if (!$res) {
                return ['code' => 500, 'message' => '加密失败，请重试'];
            }
            $data .= $encryptedTemp;
        }

        openssl_free_key($key);
        return ['code' => 200, 'message' => base64_encode($data)];
    }

        /**
     * @FuncName:sslPrivateDecrypt
     * @Description 私钥解密
     * @User ZHaoGuiBin
     * @Date 2020-08-14 10:56
     * @param $encryptData
     * @return array
     */
    private static function sslPrivateDecrypt($encryptData)
    {

        if (!$encryptData) {
            return ['code' => 500, 'message' => '没有解密数据'];
        }

        $decrypted = "";
        $decodeStr = base64_decode($encryptData);
        $key = self::getMerchantPrivateKey();
        if (!$key) {
            return ['code' => 500, 'message' => '获取密钥失败，请联系管理员处理'];
        }

        $enArray = str_split($decodeStr, self::KEYSIZE / 8);

        foreach ($enArray as $va) {
            $decryptedTemp = "";
            $res = openssl_private_decrypt($va, $decryptedTemp, $key, OPENSSL_PKCS1_PADDING);
            if (!$res) {
                return ['code' => 500, 'message' => '加密失败，请联系管理员处理'];
            }
            $decrypted .= $decryptedTemp;
        }
        openssl_free_key($key);
        return ['code' => 200, 'message' => $decrypted];
    }