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[[Category:OtherOS]]
=Introduction=
=Introduction=


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=ATA and ENCDEC Keys=
=ATA and ENCDEC Keys=


''Main Article [[HDD Encryption]]''
See http://www.ps3devwiki.com/wiki/HDD_Encryption


=Device Mapper=
=Device Mapper=
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</pre>
</pre>


==dm-crypt==
==dm-crypto==


* We don't need xts_aes application anymore.
* We don't need xts_aes application anymore.
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* Implemented PS3 partition support in Linux kernel. See patch '''0035-ps3-partition.patch''' here http://gitorious.ps3dev.net/ps3linux/kernel-patches-35
* Implemented PS3 partition support in Linux kernel. See patch '''0035-ps3-partition.patch''' here http://gitorious.ps3dev.net/ps3linux/kernel-patches-35
* Use kpartx tool to reread partition table.
* Use kpartx tool to reread partition table.
==Structure==
<pre>
#define MAX_ACL_ENTRIES 8
#define MAX_PARTITIONS 8
#define MAGIC1 0x0FACE0FFULL
#define MAGIC2 0xDEADFACEULL
struct p_acl_entry {
u64 laid;
u64 rights;
};
struct d_partition {
u64 p_start;
u64 p_size;
struct p_acl_entry p_acl[MAX_ACL_ENTRIES];
};
struct disklabel {
u8 d_res1[16];
u64 d_magic1;
u64 d_magic2;
u64 d_res2;
u64 d_res3;
struct d_partition d_partitions[MAX_PARTITIONS];
u8 d_pad[0x600 - MAX_PARTITIONS * sizeof(struct d_partition)- 0x30];
};
</pre>


==kpartx==
==kpartx==
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* We need a patch which adds PS3 partition table support.
* We need a patch which adds PS3 partition table support.
* Official GIT repo: http://git.opensvc.com/multipath-tools/.git
* Official GIT repo: http://git.opensvc.com/multipath-tools/.git
* '''PS3 partition table support is upstream now, you don't have to patch it anymore !!!'''


===Patching and Building===
===Patching and Building===
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=Making Changes to cell_ext_os_area VFLASH Region=
=Making Changes to cell_ext_os_area VFLASH Region=


* Here is one of the use cases for your dumped HDD and VFLASH keys.
* It's the VFLASH region where petitboot is stored.
* Useful for OtherOS++ users.
* You will need it if you flash bad petitboot which doesn't boot and just hangs.
* You will need it if you flash bad petitboot which doesn't boot and just hangs.
* You have to connect your HDD to your PC, e.g. with SATA-2-USB adapter.
* You have to connect your HDD to your PC, e.g. with SATA-2-USB adapter.
* We will clear OtherOS boot flag and GameOS will boot again.
* We don't have to decrypt VFLASH, only HDD, because cell_ext_os_area is NOT encrypted with VFLASH key, only with HDD key.
* I tested everything myself, it's safe to use.


<pre>
<pre>
modprobe dm_mod
cell_ext_os_area starts at offset 0xe740000 on VFLASH.
insmod dm-bswap16
 
# On my PC, sdd is the PS3 HDD connected through SATA-USB adapater
 
hdd_size=`blockdev --getsize /dev/sdd`
 
echo "0 $hdd_size bswap16 /dev/sdd" | dmsetup create hdd
 
echo <your data key as hex string> <your tweak key as hex string> | xxd -r -p > hdd_key.bin
 
cryptsetup create -c aes-xts-plain64 -d ./hdd_key.bin -s 256 hdd_crypt /dev/mapper/hdd
 
kpartx-ps3 -a /dev/mapper/hdd_crypt
 
# cell_ext_os_area starts at offset 0xe740000 on VFLASH
 
# first dump os area parameters
# it begins at offset 0xe740200
 
dd if=/dev/mapper/hdd_crypt1 of=params.bin bs=1 count=512 skip=$((0xe740200))
 
# now clear the boot flag
# just make the first 4 bytes in params.bin all 0s
 
# now we write it back
 
dd of=/dev/mapper/hdd_crypt1 if=params.bin bs=1 count=512 seek=$((0xe740200))
 
sync
 
# clean up everything before disconnecting PS3 HDD
 
kpartx-ps3 -d /dev/mapper/hdd_crypt
dmsetup remove hdd_crypt
dmsetup remove hdd
 
# now GameOS should boot and you can flash a new petitboot :)
 
# you also could write new petitboot image to VFLASH :)
</pre>
</pre>


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* http://backreference.org/2010/09/25/access-partitions-in-non-disk-block-devices-with-kpartx/
* http://backreference.org/2010/09/25/access-partitions-in-non-disk-block-devices-with-kpartx/
* 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/
{{Linux}}<noinclude>[[Category:Main]]</noinclude>
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