Master keydrive exports keys to file

src/freedombone-keydrive

@@ -134,7 +134,49 @@ if [[ $MASTER_DRIVE == "yes" || $MASTER_DRIVE == "y" || $MASTER_DRIVE == "1" ]];
       rm -rf $USB_MOUNT
       exit 73025
   fi
+
+  # export the gpg key and backup key as text
+  # so that it may be imported at the beginning of new installs
+  USER_EMAIL_ADDRESS=$MY_USERNAME@$HOSTNAME
+  GPG_ID=$(gpg --list-keys $USER_EMAIL_ADDRESS | sed -n '2p' | sed 's/^[ \t]*//')
+  GPG_BACKUP_ID=$(gpg --list-keys "(backup key)" | sed -n '2p' | sed 's/^[ \t]*//')
+
+  gpgerrstr=$'error'
+  gpgkey=$(gpg --armor --export $GPG_ID)
+  if [[ "$gpgkey" == *"$gpgerrstr"* ]]; then
+      echo $'Problem exporting public gpg key'
+      echo "$gpgkey"
+      exit 735282
+  fi
+  gpgprivkey=$(gpg --armor --export-secret-key $GPG_ID)
+  if [[ "$gpgprivkey" == *"$gpgerrstr"* ]]; then
+      echo $'Problem exporting private gpg key'
+      echo "$gpgprivkey"
+      gpgprivkey=
+      exit 629362
+  fi
+
+  backupgpgkey=$(gpg --armor --export $GPG_BACKUP_ID)
+  if [[ "$gpgkey" == *"$gpgerrstr"* ]]; then
+      echo $'Problem exporting public gpg key'
+      echo "$gpgkey"
+      exit 735282
+  fi
+  backupgpgprivkey=$(gpg --armor --export-secret-key $GPG_BACKUP_ID)
+  if [[ "$gpgprivkey" == *"$gpgerrstr"* ]]; then
+      echo $'Problem exporting private gpg key'
+      echo "$gpgprivkey"
+      gpgprivkey=
+      exit 629362
+  fi
+
+  echo "$gpgkey" > $USB_MOUNT/.mastergpgkey
+  echo "$gpgprivkey" >> $USB_MOUNT/.mastergpgkey
+  echo "$backupgpgkey" > $USB_MOUNT/.backupgpgkey
+  echo "$backupgpgprivkey" >> $USB_MOUNT/.backupgpgkey
+
   cp -rf /home/$MY_USERNAME/.gnupg $USB_MOUNT
+
   if [ -d /etc/letsencrypt ]; then
       cp -rf /etc/letsencrypt $USB_MOUNT
       echo $"LetsEncrypt keys copied to $USB_DRIVE"

src/freedombone-utils-keys

@@ -119,6 +119,19 @@ function interactive_gpg_from_usb {
             cp -r $USB_MOUNT/letsencrypt/* /etc/letsencrypt
         fi
 
+        if [ -f $USB_MOUNT/.mastergpgkey && -f $USB_MOUNT/.backupgpgkey ]; then
+            # Recovering keys from file rather than just copying the gnupg
+            # directory may help to avoid problems during upgrades/reinstalls
+            su -c "gpg --allow-secret-key-import --import $USB_MOUNT/.mastergpgkey" - $MY_USERNAME
+            su -c "gpg --allow-secret-key-import --import $USB_MOUNT/.backupgpgkey" - $MY_USERNAME
+            if [ -d /home/$MY_USERNAME/.gnupg ]; then
+                chmod 700 /home/$MY_USERNAME/.gnupg
+                chmod -R 600 /home/$MY_USERNAME/.gnupg/*
+                chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.gnupg
+            fi
+            dialog --title $"Recover Encryption Keys" \
+                   --msgbox $"GPG Keyring loaded to $HOME_DIR from master keydrive" 6 70
+        else
             if [ -d $USB_MOUNT/.gnupg ]; then
                 if [ ! -d $HOME_DIR/.gnupg ]; then
                     mkdir $HOME_DIR/.gnupg
@@ -134,6 +147,7 @@ function interactive_gpg_from_usb {
                 fi
                 cp -r $USB_MOUNT/.gnupg_fragments/* $HOME_DIR/.gnupg_fragments
             fi
+        fi
 
         if [[ $SSH_IMPORTED == "no" ]]; then
             if [ -d $USB_MOUNT/.ssh ]; then