WIP: Support non-standard images

[wcampbell0x2a]

• Support non standard images. Read and Write!
• Add Kind for including endian and version information
• Add Kind: LE_V4_0 for linux kernel and upstream squashfs-tools support
• Add Kind: BE_V4_0 for custom vendor firmware
• Add Kind: AVM_BE_V4_0 for Fritz!OS firmware support. Added because it's interesting, as they kept some of it still BE.
• Change lookup table from u32 to u64. This was working in LE, but is
  very wrong for LE!

See #72

[wcampbell0x2a]

@qkaiser do you know why the fragment table is broken from this unblob test image?

[qkaiser]

@qkaiser do you know why the fragment table is broken from this unblob test image?

It's a non-standard image built by our fork of sasquatch to create SquashFS v4 in big-endian (see https://github.com/onekey-sec/sasquatch/). Not sure why the fragment table would be broken.

[wcampbell0x2a]

@qkaiser do you know why the fragment table is broken from this unblob test image?

It's a non-standard image built by our fork of sasquatch to create SquashFS v4 in big-endian (see https://github.com/onekey-sec/sasquatch/). Not sure why the fragment table would be broken.

I currently don't see a mksquashfs in that repo. At least the Makefile build system doesn't build it.

Also getting an error when using that fork with this test bin?

(4.5.1-sasquatch) $ ./sasquatch -be squashfs_v4.bin
Reading a different endian SQUASHFS filesystem on squashfs_v4.bin
FATAL ERROR: Block size too small.  File system is corrupt.

[qkaiser]

I'll investigate and get back to you. May take a few days :)

[wcampbell0x2a]

I'll investigate and get back to you. May take a few days :)

All good! I figured it out :)