hostapd – Not enough entropy in /dev/random

[mskotis]

Hi
I’m trying to run hostapd with WPA2-PSK configuration. It starts correctly, but complains about not enough entropy in /dev/random and every connection attempt fails with the same entropy error.


root@mtcdt:/home/mtadm# hostapd /etc/hostapd.conf
Configuration file: /etc/hostapd.conf
nl80211: Could not re-add multicast membership for vendor events: -2 (No such file or directory)
Using interface wlan0 with hwaddr 00:e0:4c:03:74:d1 and ssid "alracnet"
random: Only 15/20 bytes of strong random data available from /dev/random
random: Not enough entropy pool available for secure operations
WPA: Not enough entropy in random pool for secure operations - update keys later when the first station connects
wlan0: interface state UNINITIALIZED->ENABLED
wlan0: AP-ENABLED
...
random: Cannot read from /dev/random: Resource temporarily unavailable
random: Got 0/6 bytes from /dev/random
random: Only 14/20 bytes of strong random data available from /dev/random
random: Not enough entropy pool available for secure operations
WPA: Not enough entropy in random pool to proceed - reject first 4-way handshake
...


One solution to this problem would probably be to install haveged daemon, but it’s not available in opkg repositories.

I also tried to pass an argument to hostapd to change random file to /dev/urandom, but it gives an error and falls back to /dev/random.

root@mtcdt:/home/mtadm# hostapd -dd -e /dev/urandom /etc/hostapd.conf
random: Invalid entropy file /dev/urandom
random: Trying to read entropy from /dev/random


Could anyone point me the direction to solve the problem please?

Best regards

[Author]

Posts