sshd key length checking

gistfile1.txt

# check authorized keys
while read line; do if [ "$(echo $line | wc -c)" -gt 20 ]; then echo $line > /tmp/key; ssh-keygen -l -f /tmp/key; else continue; fi; done < .ssh/authorized_keys ; rm /tmp/key >/dev/null

# check local keys
for i in .ssh/*.pub; do ssh-keygen -l -f $i; done

# check sshd host keys
for i in /etc/ssh/*.pub; do ssh-keygen -l -f $i; done



# generate new rsa host key
ssh-keygen -f /etc/ssh/ssh_host_rsa_key -N '' -t rsa -b 4096