生成签名时
openssl_get_privatekey
$priKey = "-----BEGIN RSA PRIVATE KEY----- " .
wordwrap($priKey, 64, " ", true) .
" -----END RSA PRIVATE KEY-----";
$res = openssl_get_privatekey($priKey);
========
验证签名时
如果上传的文件就是支付宝后台下载的公钥（不带头尾的一行字符串），
那不需要再用
openssl_get_publickey
获取一次了。。
$res = "-----BEGIN PUBLIC KEY----- " .
wordwrap($pubKey, 64, " ", true) .
" -----END PUBLIC KEY-----";
file_put_contents(HOME_DIR.'/pay_alipayqrcode_callback.txt',date("Y-m-d H:i:s")."-pubKey:"." ".var_export($res,true)." ",FILE_APPEND);
//$res = openssl_get_publickey($pubKey);不需要再获取一次了。。
openssl_get_publickey适用于文件如下格式的
格式如这样的
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----