hostapd配置wifi热点wpa密码后，连接提示密码错误

问题描述

• 用手机wifi连接开发板配置好密码的hostapd热点，要么连接不上提示密码错误；要么用一会VNC后，断开连接。

问题解决

• 在hostapd.conf的配置文件中，添加如下选项：

wpa_pairwise=TKIP CCMP

• 然后重新连接，发现问题解决，wifi不再断开连接，也不提示密码错误。

思考

• 根据hostapd官方文档的内容：

# Set of accepted cipher suites (encryption algorithms) for pairwise keys
# (unicast packets). This is a space separated list of algorithms:
# CCMP = AES in Counter mode with CBC-MAC (CCMP-128)
# TKIP = Temporal Key Integrity Protocol
# CCMP-256 = AES in Counter mode with CBC-MAC with 256-bit key
# GCMP = Galois/counter mode protocol (GCMP-128)
# GCMP-256 = Galois/counter mode protocol with 256-bit key
# Group cipher suite (encryption algorithm for broadcast and multicast frames)
# is automatically selected based on this configuration. If only CCMP is
# allowed as the pairwise cipher, group cipher will also be CCMP. Otherwise,
# TKIP will be used as the group cipher. The optional group_cipher parameter can
# be used to override this automatic selection.
#
# (dot11RSNAConfigPairwiseCiphersTable)
# Pairwise cipher for WPA (v1) (default: TKIP)
#wpa_pairwise=TKIP CCMP
# Pairwise cipher for RSN/WPA2 (default: use wpa_pairwise value)
#rsn_pairwise=CCMP

• 大概是加密算法的配置，猜测是未配置传递密钥的加密算法，导致无法正确解密手机端传递的wifi密码。