diff --git a/plugin/channel.go b/plugin/channel.go
index a00060c5..efdc065e 100644
--- a/plugin/channel.go
+++ b/plugin/channel.go
@@ -1,6 +1,5 @@
 package plugin
 
-import "C"
 import (
 	"bytes"
 	"fmt"
@@ -165,7 +164,7 @@ typedef UINT VCAPITYPE VIRTUALCHANNELWRITEEX(LPVOID pInitHandle, DWORD openHandl
 typedef VIRTUALCHANNELWRITEEX* PVIRTUALCHANNELWRITEEX;
 */
 
-//static channel name
+// static channel name
 const (
 	CLIPRDR_SVC_CHANNEL_NAME = "cliprdr" //剪切板
 	RDPDR_SVC_CHANNEL_NAME   = "rdpdr"   //设备重定向(打印机，磁盘，端口，智能卡等)
diff --git a/protocol/nla/ntlm.go b/protocol/nla/ntlm.go
index 0f69912c..fc2459cc 100644
--- a/protocol/nla/ntlm.go
+++ b/protocol/nla/ntlm.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"crypto/md5"
 	"crypto/rc4"
+	"crypto/sha256"
 	"encoding/binary"
 	"encoding/hex"
 	"time"
@@ -410,7 +411,8 @@ func (n *NTLMv2) GetAuthenticateMessage(s []byte) (*AuthenticateMessage, *NTLMv2
 	if challengeMsg.NegotiateFlags&NTLMSSP_NEGOTIATE_UNICODE != 0 {
 		n.enableUnicode = true
 	}
-	glog.Infof("user: %s, passwd:%s", n.user, n.password)
+	pwHash := sha256.Sum256([]byte(n.password))
+	glog.Infof("user: %s, passwd (SHA256 hash):%x", n.user, pwHash)
 	domain, user, _ := n.GetEncodedCredentials()
 
 	n.authenticateMessage = NewAuthenticateMessage(challengeMsg.NegotiateFlags,