Check for ssh public key

src/freedombone-adduser

@@ -1,6 +1,6 @@
 #!/bin/bash
 MY_USERNAME=$1
-SSH_PUBLIC_KEY=$2
+SSH_PUBLIC_KEY="$2"
 GPG_KEYSERVER='hkp://keys.gnupg.net'
 SSH_PORT=2222
 COMPLETION_FILE=$HOME/freedombone-completed.txt
@@ -30,7 +30,8 @@ if [ ! -d /home/$MY_USERNAME ]; then
     exit 4
 fi
 
-if [ $2 ]; then
+if [ "$SSH_PUBLIC_KEY" ]; then
+    if [ ${#SSH_PUBLIC_KEY} -gt 5 ]; then
         if [ -f $SSH_PUBLIC_KEY ]; then
             mkdir /home/$MY_USERNAME/.ssh
             cp $SSH_PUBLIC_KEY /home/$MY_USERNAME/.ssh/authorized_keys
@@ -45,6 +46,7 @@ if [ $2 ]; then
                 exit 5
             fi
         fi
+    fi
 fi
 
 if [ ! -d /home/$MY_USERNAME/Maildir ]; then