Check for ssh public key

src/freedombone-adduser

 #!/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
     exit 4
 fi
 
-if [ $2 ]; then
-    if [ -f $SSH_PUBLIC_KEY ]; then
-        mkdir /home/$MY_USERNAME/.ssh
-        cp $SSH_PUBLIC_KEY /home/$MY_USERNAME/.ssh/authorized_keys
-        echo 'ssh public key installed'
-    else
-        if [[ $SSH_PUBLIC_KEY == "ssh-"* ]]; then
+if [ "$SSH_PUBLIC_KEY" ]; then
+    if [ ${#SSH_PUBLIC_KEY} -gt 5 ]; then
+        if [ -f $SSH_PUBLIC_KEY ]; then
             mkdir /home/$MY_USERNAME/.ssh
-            echo $SSH_PUBLIC_KEY > /home/$MY_USERNAME/.ssh/authorized_keys
+            cp $SSH_PUBLIC_KEY /home/$MY_USERNAME/.ssh/authorized_keys
             echo 'ssh public key installed'
         else
-            echo 'The second parameter does not look like an ssh key'
-            exit 5
+            if [[ $SSH_PUBLIC_KEY == "ssh-"* ]]; then
+                mkdir /home/$MY_USERNAME/.ssh
+                echo $SSH_PUBLIC_KEY > /home/$MY_USERNAME/.ssh/authorized_keys
+                echo 'ssh public key installed'
+            else
+                echo 'The second parameter does not look like an ssh key'
+                exit 5
+            fi
         fi
     fi
 fi