Removing ssh keys via the user control panel

src/freedombone-controlpanel-user

 function add_ssh_key {
     data=$(tempfile 2>/dev/null)
     trap "rm -f $data" 0 1 2 5 15
-    dialog --title $"Add your ssh public key" \
+    dialog --title $"Add an ssh key for logging in" \
            --backtitle $"Freedombone User Control Panel" \
-           --inputbox $"This will allow you to log into Freedombone if you have an ssh key on your system, and provides much stronger security than simply using a login password.\n\nWARNING: If you make any mistakes here then you may not be able to log in and will need to get the administrator to clear your ssh authorized_keys file." 15 60 2>$data
+           --inputbox $"This will allow you to log into ${PROJECT_NAME} if you have an ssh key on your system, and provides much stronger security than simply using a login password.\n\nWARNING: If you make any mistakes here then you may not be able to log in and will need to get the administrator to clear your ssh authorized_keys file." 15 60 2>$data
     sel=$?
     case $sel in
         0)
 }
 
 function remove_ssh_key {
+    data=$(tempfile 2>/dev/null)
+    trap "rm -f $data" 0 1 2 5 15
+    dialog --title $"Remove an ssh key for logging in" \
+           --backtitle $"Freedombone User Control Panel" \
+           --inputbox $"Enter the ssh public key which is to be removed. This can be just the address at the end.\n\nWARNING: If you make any mistakes here then you may not be able to log in and will need to get the administrator to clear your ssh authorized_keys file." 15 60 2>$data
+    sel=$?
+    case $sel in
+        0)
+            SSH_PUBLIC_KEY=$(<$data)
+            if [ ${#SSH_PUBLIC_KEY} -gt 5 ]; then
+                if [ -f /home/$USER/.ssh/authorized_keys ]; then
+                    sed -i "s|.*${SSH_PUBLIC_KEY}.*||g" /home/$USER/.ssh/authorized_keys
+                    dialog --title $"Remove an ssh public key" \
+                           --backtitle $"Freedombone User Control Panel" \
+                           --msgbox $"The ssh key has been removed" 6 50
+                fi
+            fi
+            ;;
+    esac
 }
 
 function menu_encryption_keys {