Load key fragments from multiple USB drives

src/freedombone

@@ -3819,7 +3819,7 @@ function backup_to_friends_servers {
       echo '        if [ $REMOTE_DOMAIN ]; then' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
       echo "            cd /home/$MY_USERNAME/.gnupg_fragments" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
       echo '            no_of_shares=$(ls -afq keyshare* | wc -l)' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
-      echo '            no_of_shares=$((no_of_fragments - 2))' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+      echo '            no_of_shares=$((no_of_shares - 2))' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
       echo '            if [[ ${no_of_shares} > 0 ]]; then' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
       echo '                # Pick a share index based on the domain name' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
       echo '                # This ensures that the same share is always given to the same domain' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME

src/freedombone-config

@@ -271,12 +271,53 @@ function interactive_gpg_from_remote {
   return 0
 }
 
-function interactive_gpg_from_usb {
+function reconstruct_key {
-  dialog --title "Encryption keys" --msgbox 'Plug in a USB drive containing a copy of your .gnupg directory' 6 70
+    if [ ! -d /home/$MY_USERNAME/.gnupg_fragments ]; then
+        return
+    fi
+    cd /home/$MY_USERNAME/.gnupg_fragments
+    no_of_shares=$(ls -afq keyshare* | wc -l)
+    no_of_shares=$((no_of_shares - 2))
+    if [[ ${no_of_shares} < 4 ]]; then
+        dialog --title "Encryption keys" --msgbox 'Not enough fragments to reconstruct the key' 6 70
+        exit 7348
+    fi
+    gfcombine /home/$MY_USERNAME/.gnupg_fragments/keyshare*
+    if [ ! "$?" = "0" ]; then
+        dialog --title "Encryption keys" --msgbox 'Unable to reconstruct the key' 6 70
+        exit 7348
+    fi
 
+    KEYS_FILE=/home/$MY_USERNAME/.gnupg_fragments/keyshare.asc
+    if [ ! -f $KEYS_FILE ]; then
+        dialog --title "Encryption keys" --msgbox 'Unable to reconstruct the key' 6 70
+    fi
+
+    su -c "gpg --allow-secret-key-import --import $KEYS_FILE" - $MY_USERNAME
+    if [ ! "$?" = "0" ]; then
+        echo 'Unable to import gpg key'
+        shred -zu $KEYS_FILE
+        rm -rf /home/$MY_USERNAME/.tempgnupg
+        exit 9654
+    fi
+
+    dialog --title "Encryption keys" --msgbox 'Key has been reconstructed' 6 70
+}
+
+function interactive_gpg_from_usb {
+  dialog --title "Encryption keys" --msgbox 'Plug in a USB drive containing a copy of your full key or key fragment' 6 70
+
+  GPG_LOADING="yes"
+  GPG_CTR=0
+  while [[ $GPG_LOADING == "yes" ]]
+  do
       if [[ $INSTALLING_ON_BBB == "yes" ]]; then
           GPG_USB_DRIVE='/dev/sda1'
           if [ ! -b $GPG_USB_DRIVE ]; then
+              if [[ ${GPG_CTR} > 0 ]]; then
+                  reconstruct_key
+                  return 0
+              fi
               dialog --title "Encryption keys" --msgbox 'No USB drive found' 6 30
               exit 739836
           fi
@@ -287,6 +328,10 @@ function interactive_gpg_from_usb {
               if [ ! -b $GPG_USB_DRIVE ]; then
                   GPG_USB_DRIVE='/dev/sdd1'
                   if [ ! -b $GPG_USB_DRIVE ]; then
+                      if [[ ${GPG_CTR} > 0 ]]; then
+                          reconstruct_key
+                          return 0
+                      fi
                       dialog --title "Encryption keys" --msgbox 'No USB drive found' 6 30
                       exit 27852
                   fi
@@ -310,19 +355,39 @@ function interactive_gpg_from_usb {
       fi
       mount $GPG_USB_DRIVE $GPG_USB_MOUNT
       if [ ! "$?" = "0" ]; then
-      dialog --title "Encryption keys" --msgbox "There was a problem mounting the USB drive to $GPG_USB_MOUNT" 6 70
+          if [[ ${GPG_CTR} > 0 ]]; then
+              rm -rf $GPG_USB_MOUNT
+              reconstruct_key
+              return 0
+          fi
+          dialog --title "Encryption keys" \
+                 --msgbox "There was a problem mounting the USB drive to $GPG_USB_MOUNT" 6 70
           rm -rf $GPG_USB_MOUNT
           exit 74393
       fi
 
       if [ ! -d $GPG_USB_MOUNT/.gnupg ]; then
-      dialog --title "Encryption keys" --msgbox "The directory $GPG_USB_MOUNT/.gnupg was not found" 6 70
+          if [ ! -d $GPG_USB_MOUNT/.gnupg_fragments ]; then
+              if [[ ${GPG_CTR} > 0 ]]; then
+                  umount $GPG_USB_MOUNT
+                  rm -rf $GPG_USB_MOUNT
+                  reconstruct_key
+                  return 0
+              fi
+              dialog --title "Encryption keys" \
+                     --msgbox "The directory $GPG_USB_MOUNT/.gnupg or $GPG_USB_MOUNT/.gnupg_fragments was not found" 6 70
               umount $GPG_USB_MOUNT
               rm -rf $GPG_USB_MOUNT
               exit 723814
           fi
+      fi
 
+      if [ -d $GPG_USB_MOUNT/.gnupg ]; then
           cp -r $GPG_USB_MOUNT/.gnupg /home/$(grep 'MY_USERNAME' temp.cfg | awk -F '=' '{print $2}')
+          GPG_LOADING="no"
+      else
+          cp -r $GPG_USB_MOUNT/.gnupg_fragments /home/$(grep 'MY_USERNAME' temp.cfg | awk -F '=' '{print $2}')
+      fi
 
       if [ -d $GPG_USB_MOUNT/.ssh ]; then
           cp $GPG_USB_MOUNT/.ssh/* /home/$(grep 'MY_USERNAME' temp.cfg | awk -F '=' '{print $2}')/.ssh
@@ -330,6 +395,12 @@ function interactive_gpg_from_usb {
 
       umount $GPG_USB_MOUNT
       rm -rf $GPG_USB_MOUNT
+      if [[ $GPG_LOADING == "yes" ]]; then
+          dialog --title "Encryption keys" \
+                 --msgbox "Now remove the USB drive. Insert the next drive containing a key fragment, or select Ok to finish" 6 70
+      fi
+      GPG_CTR=$((GPG_CTR + 1))
+  done
 }
 
 function interactive_gpg {
@@ -342,7 +413,7 @@ function interactive_gpg {
       dialog --backtitle "Freedombone Configuration" \
           --radiolist "GPG/PGP keys for your system:" 13 70 3 \
           1 "Generate new keys (new user)" on \
-          2 "Import keys from a USB drive" off \
+          2 "Import keys from USB drive/s" off \
           3 "Retrieve keys from friends servers" off 2> $data
       sel=$?
       case $sel in

src/freedombone-recoverkey

@@ -154,13 +154,11 @@ su -c "gpg --allow-secret-key-import --import $KEYS_FILE" - $MY_USERNAME
 if [ ! "$?" = "0" ]; then
     echo 'Unable to import gpg key'
     shred -zu $KEYS_FILE
-    rm -rf /home/$MY_USERNAME/.tempgnupg
     exit 3682
 fi
 shred -zu $KEYS_FILE
 chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.gnupg
 chmod -R 600 /home/$MY_USERNAME/.gnupg
-rm -rf /home/$MY_USERNAME/.tempgnupg
 
 echo 'GPG key was recovered'