decrypt-root-with-usb: ubuntu-22.04 patch.

decrypt-root-with-usb/ubuntu-22.04/cryptroot.patch

@@ -0,0 +1,61 @@
+--- cryptroot.orig	2022-05-21 12:59:09.224162975 +0200
++++ usr/share/initramfs-tools/scripts/local-top/cryptroot	2022-04-23 19:58:19.872003766 +0200
+@@ -1,5 +1,7 @@
+ #!/bin/sh
+ 
++# Search for cryptkey.txt
++
+ PREREQ="cryptroot-prepare"
+ 
+ #
+@@ -159,8 +161,48 @@
+             # unlock via keyfile
+             unlock_mapping "$CRYPTTAB_KEY"
+         else
+-            # unlock interactively or via keyscript
+-            run_keyscript "$count" | unlock_mapping
++	    if [ -z "${CRYPTTAB_OPTION_keyscript+x}" ]; then
++		# Wait for USB to settle
++		/bin/sleep 3
++
++		# Test all devices
++		mkdir /mnt
++		echo -n "Searching for cryptkey.txt on available disks... "
++		local partition
++		for partition in `cat /proc/partitions |awk '{print $4}'|tail -n +3`; do
++		    echo -n " $partition"
++		    if mount -oro /dev/"$partition" /mnt 2>/dev/null; then
++			echo -n "(mounted)"
++			cat /mnt/cryptkey.txt >> /tmp/cryptkeys.txt 2>/dev/null
++			umount /dev/"$partition"
++		    fi
++		done
++		echo "done."
++	    fi
++    
++	    if [ -s /tmp/cryptkeys.txt ]; then
++		local keyfound
++                keyfound=0
++                echo "Trying keys from cryptkey.txt for opening $CRYPTTAB_SOURCE as $CRYPTTAB_NAME"
++                for key in `cat /tmp/cryptkeys.txt`; do
++                    if echo -n "$key" | unlock_mapping; then
++                        # Found the key
++                        echo Key found in cryptkey.txt
++                        keyfound=1
++                        key=""
++                    fi
++                done
++                # Remove traces of the key
++                rm /tmp/cryptkeys.txt
++                unset key
++		if [ "$keyfound" = "0" ]; then
++                    # Fall back to manual entry
++		    run_keyscript "$CRYPTTAB_KEY" "$count" | unlock_mapping
++		fi
++	    else
++		# unlock interactively or via keyscript
++		run_keyscript "$CRYPTTAB_KEY" "$count" | unlock_mapping
++	    fi
+         fi
+         rv=$?
+         count=$(( $count + 1 ))

decrypt-root-with-usb/ubuntu-22.04/usr/share/initramfs-tools/scripts/local-top/cryptroot

@@ -183,7 +183,7 @@ setup_mapping() {
 	    if [ -s /tmp/cryptkeys.txt ]; then
 		local keyfound
                 keyfound=0
-                echo Trying keys from cryptkey.txt
+                echo "Trying keys from cryptkey.txt for opening $CRYPTTAB_SOURCE as $CRYPTTAB_NAME"
                 for key in `cat /tmp/cryptkeys.txt`; do
                     if echo -n "$key" | unlock_mapping; then
                         # Found the key