Mount encrypted ChromeOS partition in Chrubuntu

I have a Samsung Chromebook 2, and was using crouton to run linux in a chroot next to ChromeOS and ran out of SDD space. I opened gparted, and it told me that the GPT table was in the wrong place and that there were ~500 megs of unpartitioned space at the end of the drive. I decided to take the MicroSD card out of my Android phone and flash Chrubuntu on to it, and make a backup. I was stupid and put the backup in the ~/Downloads folder, which is encrypted with some kind of encryption related to my Google password. I then booted Chrubuntu from the SD card and moved the partition table and expanded the stateful partition to allow for more space. I then rebooted, but the Chromebook firmware didn't like the new partition layout. Normally I would just use a USB recovery stick, but I really want to get the SD card backup back because my a lot of my Android apps have stopped working because of the absence of the SD card. Also, I have a few files stored in the Downloads folder that I would like to recover. Looking at the Chromium project page, it seems that they are encrypted with some multi-layer mess of encryption involving ecryptfs. I mounted the stateful partition from Chrubuntu and found a file in the root called encrypted.block and encrypted.key. This is where my knowledge stops. I can't seem to find out how to mount the encrypted.block file, but I believe that it has something to do with my google password. The encrypted.key file just shows up as two lines of

�^�7��,3Y^�k^Y

in nano. I think that the password has something to do with my google password hash, but I can't seem to figure out what. Can someone help me to recover the data? EDIT: Just to clarify, the problem is that I can't figure out how to mount the partition. I know it has something to do with my Google password, which I know, but I am not sure how to derive the encrypted partition password from it.