From f1c5013cb27477cd7cda853ebbd6c88806e8a230 Mon Sep 17 00:00:00 2001 From: Valentin Nechayev Date: Fri, 25 Jun 2021 21:31:30 +0300 Subject: [PATCH] Fix generating authentication response with long strings Connection attributes shall be encoded using lenenc-str approach for a separate string and the whole section. --- pymysql/connections.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/pymysql/connections.py b/pymysql/connections.py index b525014ca..00605dd9b 100644 --- a/pymysql/connections.py +++ b/pymysql/connections.py @@ -898,10 +898,10 @@ def _request_authentication(self): connect_attrs = b"" for k, v in self._connect_attrs.items(): k = k.encode("utf-8") - connect_attrs += struct.pack("B", len(k)) + k + connect_attrs += _lenenc_int(len(k)) + k v = v.encode("utf-8") - connect_attrs += struct.pack("B", len(v)) + v - data += struct.pack("B", len(connect_attrs)) + connect_attrs + connect_attrs += _lenenc_int(len(v)) + v + data += _lenenc_int(len(connect_attrs)) + connect_attrs self.write_packet(data) auth_packet = self._read_packet()