From d216d26eb1635115052a1563cda7545be275752a Mon Sep 17 00:00:00 2001
From: Mrs4s <1844812067@qq.com>
Date: Mon, 25 Jan 2021 03:53:20 +0800
Subject: [PATCH] fix protocol.

---
 client/builders.go | 2 +-
 client/client.go   | 1 +
 client/decoders.go | 4 +++-
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/client/builders.go b/client/builders.go
index ef11bf4c..c3c292c5 100644
--- a/client/builders.go
+++ b/client/builders.go
@@ -222,7 +222,7 @@ func (c *QQClient) buildRequestTgtgtNopicsigPacket() (uint16, []byte) {
 		}))
 		w.Write(tlv.T147(16, []byte(c.version.SortVersionName), c.version.ApkSign))
 		w.Write(tlv.T177(c.version.BuildTime, c.version.SdkVersion))
-		w.Write(tlv.T400(c.g, c.Uin, SystemDeviceInfo.Guid, []byte("stMNokHgxZUGhsYp"), 1, 16, c.t403))
+		w.Write(tlv.T400(c.g, c.Uin, SystemDeviceInfo.Guid, c.dpwd, 1, 16, c.t403))
 		w.Write(tlv.T187(SystemDeviceInfo.MacAddress))
 		w.Write(tlv.T188(SystemDeviceInfo.AndroidId))
 		w.Write(tlv.T194(SystemDeviceInfo.IMSIMd5))
diff --git a/client/client.go b/client/client.go
index 8f9b7811..f2c123d7 100644
--- a/client/client.go
+++ b/client/client.go
@@ -57,6 +57,7 @@ type QQClient struct {
 	retryTimes      int
 	version         *versionInfo
 
+	dpwd             []byte
 	syncCookie       []byte
 	pubAccountCookie []byte
 	msgCtrlBuf       []byte
diff --git a/client/decoders.go b/client/decoders.go
index e42ed6cf..8d3a6137 100644
--- a/client/decoders.go
+++ b/client/decoders.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"github.com/Mrs4s/MiraiGo/client/pb/cmd0x6ff"
 	"github.com/Mrs4s/MiraiGo/client/pb/profilecard"
+	"github.com/Mrs4s/MiraiGo/utils"
 	"net"
 	"strconv"
 	"strings"
@@ -40,8 +41,9 @@ func decodeLoginResponse(c *QQClient, _ uint16, payload []byte) (interface{}, er
 	reader.ReadUInt16()
 	m := reader.ReadTlvMap(2)
 	if m.Exists(0x402) {
+		c.dpwd = []byte(utils.RandomString(16))
 		c.t402 = m[0x402]
-		h := md5.Sum(append(append(SystemDeviceInfo.Guid, []byte("stMNokHgxZUGhsYp")...), c.t402...))
+		h := md5.Sum(append(append(SystemDeviceInfo.Guid, c.dpwd...), c.t402...))
 		c.g = h[:]
 	}
 	if t == 0 { // login success