前言
这个支付接口的加密方式是rsa密钥形式。比其他的一般是md5形式稍微麻烦一点。
rsa加密代码
代码语言：javascript复制 //组织签名串
$kq_all_para=$this->param_ck_null($return_url,"pageUrl");
$kq_all_para.=$this->param_ck_null($notify_url,'bgUrl');
$kq_all_para.=$this->param_ck_null($MerchantNo,'merchantAcctId');
$kq_all_para.=$this->param_ck_null($terminalId,'terminalId');
$kq_all_para.=$this->param_ck_null($customerId,'customerId');
$kq_all_para.=$this->param_ck_null($mref,'orderId');
$kq_all_para.=$this->param_ck_null($amountcents,'orderAmount');
$kq_all_para.=$this->param_ck_null($orderTime,'orderTime');
$kq_all_para.=$this->param_ck_null($product_desc,'productDesc');
$kq_all_para.=$this->param_ck_null($ext1,'ext1');
$kq_all_para.=$this->param_ck_null($ext2,'ext2');
$kq_all_para.=$this->param_ck_null($deviceType,'deviceType');
$kq_all_para.=$this->param_ck_null($payType,'payType');
$kq_all_para=substr($kq_all_para,0,strlen($kq_all_para)-1);
//获取私钥
$fp = fopen(__DIR__."/"."10020230621.key", "r");
$priv_key = fread($fp, filesize(__DIR__."/".'10020230621.key'));
fclose($fp);
$pkeyid = openssl_get_privatekey($priv_key);
// compute signature
openssl_sign($kq_all_para, $signMsg, $pkeyid,OPENSSL_ALGO_SHA1);
// free the key from memory
openssl_free_key($pkeyid);
$checksum = base64_encode($signMsg);
$Body["signMsg"] = $checksum;param_ck_null函数
代码语言：javascript复制用来拼接加密字符串函数
//拼接字符串
public function param_ck_null($kq_va,$kq_na) {
if($kq_va == ""){
$kq_va="";
}else{
return $kq_va=$kq_na.'='.$kq_va.'&';
}
}
