PHP實現RSA2加密

PHP實現RSA2加密

 

1.

 需要開啟php的 php_openssl擴展

<?php

　　/*
     * RSA2簽名
     * @param array 請求的參數
     * @param string 私鑰
     * return  string
     * time 2019-09-11
     * author chen
     * email [e-mail]
     *
     * */
    protected function RSA2($data,$pikey){
        

        //將請求的參數進行排序
        ksort($data);//ksort()函數 根據參數的鍵進行升序排序
        reset($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-----";
        // 請注意密鑰 是不是有帶   -----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;
        }
    }