usblukskey

Get the key for LUKS/dm-crypt from any one of several possible sources (e.g. USB, Passphrase)

How to install

1. make and make install (the latter as root)
2. Copy the example files from the doc directory and change them to meet Your setup (descriptions are in the example files)
3. Generate a new initrd with update-initramfs -u (as root)
4. That's it! It should work now!