RSA 生成 sha1WithRSA 签名

 //生成 sha1WithRSA 签名
 public function genSign($toSign, $privateKey){




 $key = openssl_get_privatekey($privateKey);
 $this->WriteLog($this->FileName,"key:".$key);
 openssl_sign($toSign, $signature, $key);
 openssl_free_key($key);
 $sign = base64_encode($signature);
 return $sign;
 }
$privateKey 为私钥格式。