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


* spuisofs is a Linux virtual filesystem which allows you to execute isolated SPU modules from user-space.
* spuisofs is a Linux virtual filesystem which allows you to execute isolated SPU modules from user-space.
* spuisofs can execute only isolated SPU modules which are decrypted by isoldr.
* spuisofs can execute only isolated SPU modules which are decrypted by isoldr.
* I used this driver e.g. to dump my EID0 key and my ATA keys.
* GIT repo: http://gitorious.ps3dev.net/ps3linux/spuisofs
=Features=
* MFC data segment faults are handled by the driver. That means you do not have to worry about it.
* Large data buffers which can be used for data exchange between SPU and PPU.
* Data buffers are not physically continuous which eliminates the RAM allocation problem.
* Full access to all SPU registers from user-space.
=Mounting=
<pre>
glevand@debian:~$ sudo mount -t spuisofs none /mnt
</pre>
=Filesystem Layout=
<pre>
glevand@debian:~$ ls -l /mnt
total 0
-rw-rw-rw- 1 root root 1048576 Aug 16 11:10 app
-rw-rw-rw- 1 root root 1048576 Aug 16 11:10 arg1
-rw-rw-rw- 1 root root 1048576 Aug 16 11:10 arg2
--w--w--w- 1 root root      0 Aug 16 11:10 cont
-r--r--r-- 1 root root      0 Aug 16 11:10 info
-rw-rw-rw- 1 root root  262144 Aug 16 11:10 ls
-rw-rw-rw- 1 root root  131072 Aug 16 11:10 priv2
-rw-rw-rw- 1 root root  131072 Aug 16 11:10 problem
--w--w--w- 1 root root      24 Aug 16 11:10 run
-r--r--r-- 1 root root    4096 Aug 16 11:10 shadow
glevand@debian:~$ cat /mnt/info
arg1 d000000003b9d000
arg2 d000000003c9e000
</pre>


=Dumping EID0 Key with spuisofs=
=Dumping EID0 Key with spuisofs=


* I modified aim_spu_module.self to dump EID0 IV and key with my spuisofs.
* I modified aim_spu_module.self to dump EID0 IV and key with my spuisofs.
* Encrypt EID0 key seed1 with the dumped IV and key and you will get your EID0 AES-CBC-128 key.
* Use the computed EID0 key and the dumped IV to decrypt EID0 data at offset 0x20 of size 0xC0.
* Encrypt EID0 key seed2 with the dumped IV and key and you will get your EID0 AES-CBC-128 key.
* Use the computed EID0 key and the dumped IV to decrypt EID0 data at offset 0x7A0 of size 0xC0.
* dump_eid0_key.tar.gz: http://www.multiupload.nl/T3ZFSG057P
* See also http://www.ps3devwiki.com/wiki/Making_Isolated_SPU_Modules_and_Loaders
==EID0 Key Seed==
Seed1:
<pre>
2E D7 CE 8D 1D 55 45 45 85 BF 6A 32 81 CD 03 AF
</pre>
Seed2:
<pre>
30 B0 39 5D C5 83 5A AA 3A 79 86 B4 4A FA E6 84
</pre>


==SPU Program==
==SPU Program==
Line 176: Line 122:
==Result==
==Result==


* aes_cbc.tar.gz: http://www.multiupload.nl/CKP5KCW2BL
TODO
* aes_cmac_omac1.tar.gz: http://www.multiupload.nl/6TRC2LJQ4W
 
<pre>
[glevand@arch dump_eid0_key]$ ./dump_eid0_key ../dump_eid0_key.self ../eid0
spuisofs found at /mnt
arg1 kernel virtual address d000000000722000
shadow: spe_execution_status 7
priv2: puint_mb_R 2
shadow: spe_execution_status b
problem: spu_status_R 6660082
[glevand@arch dump_eid0_key]$ hexdump -C /mnt/arg1
...
Here are your EID0 key and IV
At offset 0x10 is EID0 IV (16 bytes)
At offset 0x20 is EID0 key (32 bytes)
...
</pre>
 
<pre>
glevand@debian:~$ hexdump -C eid0_seed1.bin
00000000  2e d7 ce 8d 1d 55 45 45  85 bf 6a 32 81 cd 03 af  |.....UEE..j2....|
00000010
glevand@debian:~$ cat ./eid0_seed1.bin | ./aes_cbc/aes_cbc -i 00000000000000000000000000000000 -k <dumped key> | hexdump -C
...
Here is you EID0 key
...
 
glevand@debian:~$ hexdump -C eid0_seed2.bin
00000000  30 b0 39 5d c5 83 5a aa  3a 79 86 b4 4a fa e6 84  |0.9]..Z.:y..J...|
00000010
glevand@debian:~$ cat ./eid0_seed2.bin | ./aes_cbc/aes_cbc -i 00000000000000000000000000000000 -k <dumped key> | hexdump -C
...
Here is you EID0 key
...
 
glevand@debian:~$ cat ./ps3/eid0 | dd bs=1 skip=$((0x20)) count=$((0xc0)) | \
    ./aes_cbc/aes_cbc -d -i <dumped IV> -k <your EID0 key1> | hexdump -C
...
Here is your decrypted EID0
At offset 0xA8 is CMAC-OMAC1 (16 bytes)
...
 
glevand@debian:~$ cat ./ps3/eid0 | dd bs=1 skip=$((0x20)) count=$((0xc0)) | \
    ./aes_cbc/aes_cbc -d -i <dumped IV> -k <your EID0 key1> | dd bs=1 count=$((0xa8)) | \
    ./aes_omac1_cmac/aes_omac1_cmac -k <your EID0 key1> | hexdump -C
...
Here is CMAC-OMAC1 which should match data at offset 0xA8
...
 
glevand@debian:~$ cat ./ps3/eid0 | dd bs=1 skip=$((0x7a0)) count=$((0xc0)) | \
    ./aes_cbc/aes_cbc -d -i <dumped IV> -k <your EID0 key2> | hexdump -C
...
Here is your decrypted EID0
At offset 0xA8 is CMAC-OMAC1 (16 bytes)
...
 
glevand@debian:~$ cat ./ps3/eid0 | dd bs=1 skip=$((0x7a0)) count=$((0xc0)) | \
    ./aes_cbc/aes_cbc -d -i <dumped IV> -k <your EID0 key2>| dd bs=1 count=$((0xa8)) | \
    ./aes_omac1_cmac/aes_omac1_cmac -k <your EID0 key2> | hexdump -C
...
Here is CMAC-OMAC1 which should match data at offset 0xA8
...
</pre>
 
=Dumping EID2 Key with spuisofs=
 
* I modified fdm_spu_module.self to dump EID2 key and IV.
* fdm_spu_module.self is a very simple isolated SPU module, it just decrypts EID2 and writes the reult to PPU memory buffer.
* EID2 is encrypted with AES-CBC-256.
* Use the dumped IV and key to decrypt EID2.
* dump_eid2_key.tar.gz: http://www.multiupload.nl/D5GKYOZRAU
 
==Information about EID2==
 
* EID2 has 2 blocks: type 1 (P-block) and type 2 (S-block).
* At offset 0 you will find the header of size 0x20.
* Type 1 block starts at offset 0x20 and the size of the block is at offset 0x0 in the header (2 bytes).
* Type 2 block starts at offset 0x20 + sizeof block1 and the size of the block is at offset 0x2 in the header (2 bytes).
* Note that EID2 have another encryption level, it can be decrypted with DES, key and IV can be found in the leaked JIG kernel.
 
==SPU Program==
 
<pre>
/*
* Dump EID2 IV and key to EA with MFC
*
* Copyright (C) 2012 glevand <[email protected]>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published
* by the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
 
.text
 
start:
 
ila $2, 0x3dfa0
lr $sp, $2
 
ila $80, 0x3e000
lr $81, $3
 
stqd $7, 0($80)
stqd $8, 0x10($80) # store EID2 IV
stqd $9, 0x20($80) # store upper 16bytes of EID2 key
stqd $10, 0x30($80) # store lower 16bytes of EID2 key
stqd $11, 0x40($80)
stqd $12, 0x50($80)
 
lr $3, $80
lr $4, $81
il $5, 0x60
il $6, 0x7
il $7, 0x20
brsl $lr, 0x10 # mfc_dma_xfer
 
il $3, 0x7
brsl $lr, 0x28 # mfc_dma_wait
 
stop 0x666 # our evil stop code :)
 
/*
* r3 - LSA
* r4 - EA
* r5 - size
* r6 - tag
* r7 - cmd
*/
mfc_dma_xfer:
 
wrch $ch16, $3
wrch $ch17, $4
shlqbyi $4, $4, 4
wrch $ch18, $4
wrch $ch19, $5
wrch $ch20, $6
wrch $ch21, $7
 
bi $lr
 
/*
* r3 - tag
*/
mfc_dma_wait:
 
il $2, 0
nop $127
hbra 2f, 1f
wrch $ch23, $2
 
1:
 
rchcnt $2, $ch23
ceqi $2, $2, 1
nop $127
nop $127
nop $127
nop $127
nop $127
 
2:
 
brz $2, 1b
hbr 3f, $lr
rdch $2, $ch24
il $2, 1
shl $2, $2, $3
wrch $ch22, $2
il $2, 2
wrch $ch23, $2
rdch $2, $ch24
nop $127
 
3:
 
bi $lr
</pre>
 
==Result==
 
<pre>
glevand@debian:~/dump_eid2_key$ ./dump_eid2_key ../dump_eid2_key.self ../ps3/eid2
spuisofs found at /mnt
arg1 kernel virtual address d0000000035d3000
shadow: spe_execution_status 7
priv2: puint_mb_R 2
shadow: spe_execution_status b
problem: spu_status_R 6660082
glevand@debian:~/dump_eid2_key$ hexdump -C /mnt/arg1
...
Here is your EID2 IV and key
At offset 0x10 is EID2 IV (16 bytes)
At offset 0x20 is EID2 key (32 bytes)
...
</pre>
 
=More Examples=
 
See here:
* http://gitorious.ps3dev.net/ps3linux/aim
* http://gitorious.ps3dev.net/ps3linux/spp_verifier
 
 
 
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