PHP实现RSA2加密

PHP实现RSA2加密

1.

 需要开启php的 php_openssl扩展

<?php

　　/*
     * RSA2签名
     * @param array 请求的参数
     * @param string 私钥
     * return  string
     * time 2019-09-11
     * author chen
     * email 869476711@qq.com
     *
     * */
    protected function RSA2($data,$pikey){
        

        //将请求的参数进行排序
        ksort($data);//ksort()函数 根据参数的键进行升序排序
        reset($data);
        $signStr = '';
        foreach ($data as $key => $value) {
            if ($key == 'sign' || $value == '') continue;
            $signStr .= $key .'=' .$value .'&';
        }
        $signStr = substr($signStr, 0, -1);


        $res = "-----BEGIN RSA PRIVATE KEY-----
" . wordwrap($pikey, 64, "
", true) . "
-----END RSA PRIVATE KEY-----";
        // 请注意密钥 是不是有带   -----BEGIN RSA PRIVATE KEY-----   -----END RSA PRIVATE KEY-----

        $piKey = openssl_pkey_get_private($res);

        if ($piKey) {
            $res = openssl_get_privatekey($res);
            openssl_sign($signStr, $sign, $res, 'SHA256');
            $sign = base64_encode($sign);
            openssl_free_key($piKey);
            return $sign;
        }
    }