Editing HDD Encryption/Decryption

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[[Category:OtherOS]]
[[Category:Linux]]
=Introduction=
=Introduction=
* The goal is to mount a PS3 HDD on a FreeBSD PC (or FreeBSD PS3) and do changes to it without ENCDEC device.
* And learn the cool FreeBSD GEOM framework as well :)
* Everything was tested by me on FreeBSD 9.1.


=GEOM bswap16=
=GEOM bswap16=
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* Swaps bytes in every 16-bit word
* Swaps bytes in every 16-bit word
* Similar to dm-bswap16 on Linux.
* Similar to dm-bswap16 on Linux.
* The kernel module needs a user-space GEOM counterpart,  a shared library which is loaded and used by '''geom''' application to send commands to the kernel part.
* The kernel module needs a user-space GEOM counterpart,  a shred library which is loaded and used by geom application
to send commands to the kernel part.


http://gitorious.ps3dev.net/ps3freebsd/geom-bswap16
http://gitorious.ps3dev.net/ps3freebsd/geom-bswap16
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*
*
00100000
00100000
geom bswap16 destroy md0.bswap16
mdconfig -d -u 0
</pre>
</pre>


=GEOM geli=
=GEOM geli=
* Problem: how to set masterkey in GELI ?
* GEOM geli is a wrong approach and won't work. We need a new GEOM class for PS3 HDD decryption !!!
=GEOM AES-XTS=
* Use opencrypto framework for AES-XTS algorithm.
* The kernel module needs a user-space GEOM counterpart,  a shared library which is loaded and used by '''geom''' application to send commands to the kernel part.
http://gitorious.ps3dev.net/ps3freebsd/geom-aes-xts
http://gitorious.ps3dev.net/ps3freebsd/geom-aes-xts-lib
==Test==
<pre>
# UI shared library for GEOM AES-XTS
cp geom_aes_xts.so /lib/geom
# Load kernel module
kldload geom_aes_xts.ko
mdconfig -a -t vnode -f  ~/ps3da_enc.bin -u 1
geom bswap16 create md1
echo <your data key as hex string> <your tweak key as hex string> | xxd -r -p > hdd_key.bin
geom aes_xts create -k hdd_key.bin /dev/md1.bswap1
ls -l /dev/md1.bswap1.aes_xts
sudo dd if=/dev/md1.bswap16.aes_xts bs=512 count=1 | hexdump -C
00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000010  00 00 00 00 0f ac e0 ff  00 00 00 00 de ad fa ce  |................|
00000020  00 00 00 00 00 00 00 03  00 00 00 00 00 00 00 02  |................|
00000030  00 00 00 00 00 00 00 08  00 00 00 00 00 08 00 00  |................|
00000040  10 70 00 00 01 00 00 01  00 00 00 00 00 00 00 0b  |.p..............|
00000050  10 70 00 00 02 00 00 01  00 00 00 00 00 00 00 03  |.p..............|
00000060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000000c0  00 00 00 00 00 08 00 10  00 00 00 00 03 9a 8b 2d  |...............-|
000000d0  10 70 00 00 01 00 00 01  00 00 00 00 00 00 00 03  |.p..............|
000000e0  10 70 00 00 02 00 00 01  00 00 00 00 00 00 00 03  |.p..............|
000000f0  10 20 00 00 03 00 00 01  00 00 00 00 00 00 00 03  |. ..............|
00000100  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000150  00 00 00 00 03 a2 8b 45  00 00 00 00 00 3f ff f8  |.......E.....?..|
00000160  10 70 00 00 01 00 00 01  00 00 00 00 00 00 00 03  |.p..............|
00000170  10 70 00 00 02 00 00 01  00 00 00 00 00 00 00 03  |.p..............|
00000180  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000001e0  00 00 00 00 03 e2 8b 46  00 00 00 00 19 39 ce 0c  |.......F.....9..|
000001f0  10 70 00 00 02 00 00 01  00 00 00 00 00 00 00 03  |.p..............|
00000200
</pre>
=GEOM part PS3=
* Alternative: Parse the PS3 partition table manually and use '''gnop''' GEOM to create regions
* But GEOM '''part''' is cooler because it does it automatically and we want to learn how to implement GEOM classes.


=Links=
=Links=


* https://www.dan.me.uk/blog/2012/05/05/full-disk-encryption-in-freebsd-9-x-well-almost/
* https://www.dan.me.uk/blog/2012/05/05/full-disk-encryption-in-freebsd-9-x-well-almost/
{{BSD}}<noinclude>[[Category:Main]]</noinclude>
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