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);

         $res = "-----BEGIN RSA PRIVATE KEY-----\n" . wordwrap($pikey, 64, "\n", true) . "\n-----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;
         }
     }