From 6aef469c197a4c5d7a3a8cd766ea04fccb14ed3c Mon Sep 17 00:00:00 2001
From: huangjian <huangjian@xiaomi.com>
Date: Fri, 4 Nov 2022 20:37:04 +0800
Subject: [PATCH] nshlib:judge whether nsh login username is a valid input

Signed-off-by: huangjian <huangjian@xiaomi.com>
---
 nshlib/nsh_login.c    | 6 ++++++
 nshlib/nsh_stdlogin.c | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/nshlib/nsh_login.c b/nshlib/nsh_login.c
index 3e7e370ca..9793837c4 100644
--- a/nshlib/nsh_login.c
+++ b/nshlib/nsh_login.c
@@ -178,6 +178,12 @@ int nsh_login(FAR struct console_stdio_s *pstate)
           nsh_token(pstate, username, sizeof(username));
         }
 
+      if (username[0] == '\0')
+        {
+          i--;
+          continue;
+        }
+
 #ifdef CONFIG_NSH_PLATFORM_CHALLENGE
       platform_challenge(challenge, sizeof(challenge));
       fputs(challenge, pstate->cn_outstream);
diff --git a/nshlib/nsh_stdlogin.c b/nshlib/nsh_stdlogin.c
index d4f93f599..0ae7ae43c 100644
--- a/nshlib/nsh_stdlogin.c
+++ b/nshlib/nsh_stdlogin.c
@@ -187,6 +187,12 @@ int nsh_stdlogin(FAR struct console_stdio_s *pstate)
           nsh_stdtoken(pstate, username, sizeof(username));
         }
 
+      if (username[0] == '\0')
+        {
+          i--;
+          continue;
+        }
+
 #ifdef CONFIG_NSH_PLATFORM_CHALLENGE
       platform_challenge(challenge, sizeof(challenge));
       printf("%s", challenge);