ios_examiner.py: another AssertionError

GoogleCodeExporter commented 9 years ago

What steps will reproduce the problem?
1. NAND acquisition (successful)
2. python python_scripts/ios_examiner.py iphone4_nand.bin iphone4.plist

What is the expected output? What do you see instead?

Instead of ios_examiner shell, I get this:

Loading device information from iphone4.plist
Device model: iPhone 4 GSM
UDID: **hidden**
ECID: **hidden**
Serial number: **hidden**
key835: **hidden**
key89B: **hidden**
Chip id 0x3295ee98 banks per CE physical 2
NAND geometry : 32GB (4 CEs (2 physical banks/CE) of 8200 blocks of 128 pages 
of 8192 bytes data, 12 bytes metdata)
Image size matches expected size, looks ok
Searching for special pages...
Found  special pages in CE 0
NANDDRIVERSIGN not found, assuming metadata withening = 1
Effaceable generation 22
Effaceable CRC OK
Found effaceable lockers in ce 1 block 1 page 96
Lockers : BAG1, DONE, Dkey, LwVM
DEVICEUNIQUEINFO not found
Using VSVFL
VSVFL context open OK
ftlCtrlBlock not found, restore needed
Found cached FTL restore information
LwVM header CRC OK
FAIL, block 0 not marked as used
Traceback (most recent call last):
  File "python_scripts/ios_examiner.py", line 366, in <module>
    main()
  File "python_scripts/ios_examiner.py", line 363, in main
    ExaminerShell(image).cmdloop("")
  File "python_scripts/ios_examiner.py", line 87, in __init__
    self.system = image.getPartitionVolume(0)
  File "/Volumes/Medien2012 1/iphone-dataprotection/python_scripts/nand/nand.py", line 319, in getPartitionVolume
    return HFSVolume(bdev)
  File "/Volumes/HD/iphone-dataprotection/python_scripts/hfs/hfs.py", line 117, in __init__
    self.extentsTree = ExtentsOverflowTree(self.extentsFile)
  File "/Volumes/HD/iphone-dataprotection/python_scripts/hfs/btree.py", line 242, in __init__
    super(ExtentsOverflowTree,self).__init__(file, HFSPlusExtentKey, HFSPlusExtentRecord)
  File "/Volumes/HD/iphone-dataprotection/python_scripts/hfs/btree.py", line 15, in __init__
    assert btnode.kind == kBTHeaderNode
AssertionError

What version of the product are you using? On what operating system?
OS X version : 10.8.2 (12C60)
XCode version : 4.5.2 (4G2008a)
Tools revision : 930139479d08+ tip 

Please provide any additional information below.

When running ios_examiner.py without parameters the first time, there was no 
error.

Original issue reported on code.google.com by stefan.b...@web.de on 14 Jan 2013 at 12:46

GoogleCodeExporter commented 9 years ago

OK, can you post the output of ios_examiner.py without parameters, and also the 
first 0x600 bytes of the nand dump. This is most likely related to a bug in the 
dumper  which is not fixed yet (issue 72).

Original comment by jean.sig...@gmail.com on 14 Jan 2013 at 3:16

Changed state: Accepted

GoogleCodeExporter commented 9 years ago

OK, the command without parameters: 

python python_scripts/ios_examiner.py 

generates the following output: 

Connecting to device : **hidden**
Device model: iPhone 4 GSM
UDID: **hidden**
ECID: **hidden**
Serial number: **hidden**
key835: **hidden**
key89B: **hidden**
Chip id 0x3295ee98 banks per CE physical 2
NAND geometry : 32GB (4 CEs (2 physical banks/CE) of 8200 blocks of 128 pages 
of 8192 bytes data, 12 bytes metdata)
Searching for special pages...
Found DEVICEUNIQUEINFO, NANDDRIVERSIGN, DEVICEINFOBBT special pages in CE 0
NAND signature 0x43313131 flags 0x10005 withening=1, epoch=1
Effaceable generation 22
Effaceable CRC OK
Found effaceable lockers in ce 1 block 1 page 96
Lockers : BAG1, DONE, Dkey, LwVM
Found DEVICEUNIQUEINFO, serial number=**hidden**
Using VSVFL
VSVFL context open OK
YaFTL context OK, version=CX01 maxIndexUsn=143945 context usn=143945
LwVM header CRC OK
cprotect version : 4 (iOS 5)
iOS version:  5.1.1
Keybag state: locked
(iPhone4-data) / 

As for the nand dump,  the first 0x600 bytes are these: 

hexdump -C iphone4_nand.bin

00000000  6e 64 72 47 00 00 00 00  00 00 00 00 06 00 00 00  |ndrG............|
00000010  07 00 00 00 ff 5c 49 19  4a 94 e8 2a ec 58 55 62  |.....\I.J..*.XUb|
00000020  b6 18 00 00 3b 00 00 00  02 00 00 00 98 00 00 00  |....;...........|
00000030  02 00 00 00 78 02 00 00  01 00 00 00 b7 03 00 00  |....x...........|
00000040  03 00 00 00 fa 03 00 00  03 00 00 00 fc 03 00 00  |................|
00000050  03 00 00 00 fd 03 00 00  00 00 00 00 3c 04 00 00  |............<...|
00000060  00 00 00 00 3e 04 00 00  00 00 00 00 7f 04 00 00  |....>...........|
00000070  02 00 00 00 d4 05 00 00  03 00 00 00 7d 06 00 00  |............}...|
00000080  01 00 00 00 17 07 00 00  01 00 00 00 89 08 00 00  |................|
00000090  02 00 00 00 b5 08 00 00  02 00 00 00 b7 08 00 00  |................|
000000a0  02 00 00 00 0f 09 00 00  02 00 00 00 f3 09 00 00  |................|
000000b0  02 00 00 00 20 0b 00 00  01 00 00 00 24 0b 00 00  |.... .......$...|
000000c0  01 00 00 00 26 0b 00 00  02 00 00 00 fb 0b 00 00  |....&...........|
000000d0  02 00 00 00 ff 0b 00 00  01 00 00 00 9a 0c 00 00  |................|
000000e0  01 00 00 00 55 0d 00 00  01 00 00 00 57 0d 00 00  |....U.......W...|
000000f0  01 00 00 00 59 0d 00 00  01 00 00 00 5b 0d 00 00  |....Y.......[...|
00000100  01 00 00 00 5d 0d 00 00  01 00 00 00 6d 0d 00 00  |....].......m...|
00000110  01 00 00 00 78 0d 00 00  01 00 00 00 ac 0d 00 00  |....x...........|
00000120  02 00 00 00 45 0e 00 00  02 00 00 00 47 0e 00 00  |....E.......G...|
00000130  00 00 00 00 9a 0e 00 00  01 00 00 00 e0 0e 00 00  |................|
00000140  01 00 00 00 45 0f 00 00  03 00 00 00 63 0f 00 00  |....E.......c...|
00000150  03 00 00 00 21 10 00 00  01 00 00 00 c4 10 00 00  |....!...........|
00000160  01 00 00 00 c6 10 00 00  03 00 00 00 5b 11 00 00  |............[...|
00000170  00 00 00 00 ec 12 00 00  02 00 00 00 0a 13 00 00  |................|
00000180  03 00 00 00 17 13 00 00  01 00 00 00 65 13 00 00  |............e...|
00000190  01 00 00 00 67 13 00 00  01 00 00 00 86 13 00 00  |....g...........|
000001a0  00 00 00 00 8a 13 00 00  01 00 00 00 94 13 00 00  |................|
000001b0  01 00 00 00 96 13 00 00  00 00 00 00 87 14 00 00  |................|
000001c0  01 00 00 00 0b 15 00 00  00 00 00 00 3c 15 00 00  |............<...|
000001d0  01 00 00 00 43 16 00 00  00 00 00 00 b9 17 00 00  |....C...........|
000001e0  02 00 00 00 cb 17 00 00  02 00 00 00 d9 17 00 00  |................|
000001f0  01 00 00 00 8d 18 00 00  03 00 00 00 b6 18 00 00  |................|
00000200  00 00 00 00 00 00 00 00  01 00 00 00 04 00 00 00  |................|
00000210  08 20 00 00 80 00 00 00  10 00 00 00 c0 01 00 00  |. ..............|
00000220  00 00 00 00 fe ca ad de  00 00 00 00 00 00 00 00  |................|
00000230  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000240  00 00 00 00 00 00 00 00  00 00 00 00 00 00 56 67  |..............Vg|
00000250  00 00 00 00 7b ee d3 7b  64 c5 d9 51 c5 fd 3e 61  |....{..{d..Q..>a|
00000260  14 2b f7 0b 73 7b 44 11  5a 3e 96 42 c5 82 03 0a  |.+..s{D.Z>.B....|
00000270  5e b1 f2 08 4b 23 32 1a  79 d3 0f 3b 63 2f eb 68  |^...K#2.y..;c/.h|
00000280  3b 81 62 49 70 df b6 60  64 ee a5 06 24 06 33 14  |;.bIp..`d...$.3.|
00000290  11 ca ff 7f 9e 70 27 1a  09 11 ea 71 dc 59 0f 10  |.....p'....q.Y..|
000002a0  aa e0 b7 7f d4 5b eb 06  ac d9 6d 6f f2 11 42 09  |.....[....mo..B.|
000002b0  1b 5e 88 00 10 21 27 76  af a8 04 4c 3b 70 16 17  |.^...!'v...L;p..|
000002c0  33 7e e1 14 cd e7 22 32  e3 0e de 74 50 c5 eb 68  |3~...."2...tP..h|
000002d0  48 d6 f6 2d 47 d4 b7 46  15 c3 2a 4a 5c 01 ee 39  |H..-G..F..*J\..9|
000002e0  bb 4f fc 57 6f 01 c1 0c  22 84 f1 43 19 01 ef 60  |.O.Wo..."..C...`|
000002f0  ba 24 f3 26 9b 57 01 7f  7d 30 da 49 f5 a5 55 70  |.$.&.W..}0.I..Up|
00000300  0b 37 b8 5f e1 1e 80 50  1a ac 88 04 1c 01 b8 5f  |.7._...P......._|
00000310  7f 8f a7 6a 23 bd 72 76  f8 5a c7 6f 29 70 5f 6a  |...j#.rv.Z.o)p_j|
00000320  f8 18 5e 7d a4 34 35 5f  1b 82 a1 73 13 77 e6 7d  |..^}.45_...s.w.}|
00000330  b5 55 5c 55 ca 2a a6 3f  4e e7 fc 14 e8 d3 3d 6a  |.U\U.*.?N.....=j|
00000340  98 12 c9 71 32 f6 da 09  38 99 29 53 e0 e8 bf 1f  |...q2...8.)S....|
00000350  79 ca 92 50 4d 5c 54 1d  3d ea ad 59 34 1a 8f 28  |y..PM\T.=..Y4..(|
00000360  bc 5d 15 2a 5f 6e 9f 1d  4e 1b 7e 09 77 82 08 51  |.].*_n..N.~.w..Q|
00000370  fa c5 a0 1c cb 4b 58 53  6c 28 5e 41 05 fd 58 7c  |.....KXSl(^A..X||
00000380  ac 6a d8 23 86 d4 e6 45  21 fe 10 5c 2b fa 7f 0e  |.j.#...E!..\+...|
00000390  aa 91 59 3c 1a 59 d8 4b  55 6a df 78 a2 aa b7 39  |..Y<.Y.KUj.x...9|
000003a0  be 8d 0d 2b 70 ec 80 6c  b5 21 9e 37 73 e3 69 00  |...+p..l.!.7s.i.|
000003b0  3b 17 27 2c 04 09 9b 4c  5c b7 a7 6a d3 29 f0 1d  |;.',...L\..j.)..|
000003c0  36 ff 75 56 94 50 d1 3d  b3 12 b0 3d af c9 08 27  |6.uV.P.=...=...'|
000003d0  e2 ac 25 5b f0 fc 5d 17  e4 e3 97 4f 9e 0a 3b 05  |..%[..]....O..;.|
000003e0  4f 6b fd 34 32 ff 15 59  15 8d 43 56 49 31 9e 51  |Ok.42..Y..CVI1.Q|
000003f0  fd 4a 6e 2c 82 b5 a1 17  4e 2e f7 4d a9 b5 46 50  |.Jn,....N..M..FP|
00000400  74 6f 6f 62 00 00 00 00  01 00 00 00 00 00 00 00  |toob............|
00000410  67 6f 6c 70 01 00 00 00  01 00 00 00 00 00 00 00  |golp............|
00000420  6d 72 76 6e 02 00 00 00  06 00 00 00 00 00 00 00  |mrvn............|
00000430  6d 72 69 66 08 00 00 00  08 00 00 00 00 00 00 00  |mrif............|
00000440  73 79 73 66 10 00 00 00  f8 1f 00 00 00 00 00 00  |sysf............|
00000450  67 66 63 73 00 00 00 00  00 00 00 00 01 00 00 00  |gfcs............|
00000460  67 61 69 64 00 00 00 00  00 00 00 00 01 00 00 00  |gaid............|
00000470  74 62 62 66 00 00 00 00  00 00 00 00 01 00 00 00  |tbbf............|
00000480  65 6e 6f 6e 84 4d 7b 59  7f 9e 81 0f 2d d4 c7 57  |enon.M{Y....-..W|
00000490  65 6e 6f 6e d4 64 1b 63  76 e7 b5 78 47 6e 48 75  |enon.d.cv..xGnHu|
000004a0  65 6e 6f 6e 32 de 0d 1a  1c 8c 96 65 ec 3d 26 46  |enon2......e.=&F|
000004b0  65 6e 6f 6e c4 d3 d4 73  30 2e 6f 74 f6 8a de 6f  |enon...s0.ot...o|
000004c0  65 6e 6f 6e 23 e8 c0 49  85 36 d5 14 6c 85 0f 23  |enon#..I.6..l..#|
000004d0  65 6e 6f 6e b2 ec 06 3f  07 48 59 3b 04 23 aa 6c  |enon...?.HY;.#.l|
000004e0  65 6e 6f 6e ec 3b 41 25  0b 0b 18 17 b9 28 93 57  |enon.;A%.....(.W|
000004f0  65 6e 6f 6e ba a8 cc 11  86 ab 32 4d c3 ac 07 3f  |enon......2M...?|
00000500  65 6e 6f 6e 05 4a b4 5c  f1 80 cf 16 ec 5d 69 1c  |enon.J.\.....]i.|
00000510  65 6e 6f 6e 67 68 85 0f  33 cc b1 11 b7 fb 22 2e  |enongh..3.....".|
00000520  65 6e 6f 6e 50 58 48 77  a3 39 49 74 e3 d2 a0 4f  |enonPXHw.9It...O|
00000530  65 6e 6f 6e d3 67 b8 68  d9 5d 7f 3f 34 5a e0 2a  |enon.g.h.].?4Z.*|
00000540  65 6e 6f 6e 5e 94 54 54  a0 df ef 4d f2 d5 23 21  |enon^.TT...M..#!|
00000550  65 6e 6f 6e a8 27 49 09  f6 f8 cd 0d 05 b1 d7 52  |enon.'I........R|
00000560  65 6e 6f 6e 01 04 e6 24  be d9 6a 2a b4 c1 aa 0b  |enon...$..j*....|
00000570  65 6e 6f 6e 44 85 9d 77  78 6e b2 4a fa a2 fa 21  |enonD..wxn.J...!|
00000580  65 6e 6f 6e 69 ef 81 61  e6 00 64 3e 23 7e 21 14  |enoni..a..d>#~!.|
00000590  65 6e 6f 6e 1a cd 15 50  da 79 44 42 69 9e 9a 1a  |enon...P.yDBi...|
000005a0  65 6e 6f 6e 7e b3 8d 36  4c 71 3b 6a 7e 51 7b 32  |enon~..6Lq;j~Q{2|
000005b0  65 6e 6f 6e 25 cf ba 29  b3 ab 5b 5d 48 6b bf 51  |enon%..)..[]Hk.Q|
000005c0  65 6e 6f 6e 53 8b 4b 2b  3a 41 e3 72 94 e4 6a 11  |enonS.K+:A.r..j.|
000005d0  65 6e 6f 6e 31 3a b1 00  99 95 42 64 90 16 1f 63  |enon1:....Bd...c|
000005e0  65 6e 6f 6e 57 6f ad 0e  44 d8 c9 6e ee ea 49 5c  |enonWo..D..n..I\|
000005f0  65 6e 6f 6e bc 46 7c 39  e9 8d 44 7e e5 c3 9c 5a  |enon.F|9..D~...Z|
00000600  6c 55 73 c0 ce f0 f9 17  88 96 8c a9 dc ea 01 b7  |lUs.............|
00000610  a8 89 fd 7a 3b 2c 69 d5  ae c3 47 4f aa a0 b2 15  |...z;,i...GO....|
...

Original comment by stefan.b...@web.de on 14 Jan 2013 at 9:09

GoogleCodeExporter commented 9 years ago

sorry for the delay, the patch that should fix your issue is there :
https://code.google.com/p/iphone-dataprotection/issues/detail?id=95#c8
you'll have to reacquire the image, as the dumper code was incorrect and 
"missed" half of the data when reading.

Original comment by jean.sig...@gmail.com on 1 Apr 2013 at 9:37

GoogleCodeExporter commented 9 years ago

This fixes the AssertionError, thanks!  

However, when rerunning ios_examiner.py on the new nand dump, the following 
error occurs, resembling issue 72. Here is the output: 

Loading device information from iphone4.plist
Device model: iPhone 4 GSM
UDID: **hidden**
ECID: **hidden**
Serial number: **hidden**
key835: **hidden**
key89B: **hidden**
Chip id 0x3295ee98 banks per CE physical 2
NAND geometry : 32GB (4 CEs (2 physical banks/CE) of 8200 blocks of 128 pages 
of 8192 bytes data, 12 bytes metdata)
Image size matches expected size, looks ok
Searching for special pages...
Found DEVICEUNIQUEINFO, NANDDRIVERSIGN, DEVICEINFOBBT special pages in CE 0
NAND signature 0x43313131 flags 0x10005 withening=1, epoch=1
Effaceable generation 22
Effaceable CRC OK
Found effaceable lockers in ce 1 block 1 page 96
Lockers : BAG1, DONE, Dkey, LwVM
Found DEVICEUNIQUEINFO, serial number=**hidden**
Using VSVFL
Traceback (most recent call last):
  File "python_scripts/ios_examiner.py", line 366, in <module>
    main()
  File "python_scripts/ios_examiner.py", line 361, in main
    image = NAND(nandimagename, device_infos)
  File "/Volumes/Medien2012 4/iphone-dataprotection_030413/python_scripts/nand/nand.py", line 125, in __init__
    self.vfl = VSVFL(self)
  File "/Volumes/Medien2012 4/iphone-dataprotection_030413/python_scripts/nand/vsvfl.py", line 86, in __init__
    raise Exception("Unable to find VSVFL context for CE %d" % ce)
Exception: Unable to find VSVFL context for CE 0

The new nand dump now looks like: 

hexdump -C iphone4_nand.bin

00000000  6e 64 72 47 00 00 00 00  00 00 00 00 06 00 00 00  |ndrG............|
00000010  07 00 00 00 ff 5c 49 19  4a 94 e8 2a ec 58 55 62  |.....\I.J..*.XUb|
00000020  b6 18 00 00 3b 00 00 00  02 00 00 00 98 00 00 00  |....;...........|
00000030  02 00 00 00 78 02 00 00  01 00 00 00 b7 03 00 00  |....x...........|
00000040  03 00 00 00 fa 03 00 00  03 00 00 00 fc 03 00 00  |................|
00000050  03 00 00 00 fd 03 00 00  00 00 00 00 3c 04 00 00  |............<...|
00000060  00 00 00 00 3e 04 00 00  00 00 00 00 7f 04 00 00  |....>...........|
00000070  02 00 00 00 d4 05 00 00  03 00 00 00 7d 06 00 00  |............}...|
00000080  01 00 00 00 17 07 00 00  01 00 00 00 89 08 00 00  |................|
00000090  02 00 00 00 b5 08 00 00  02 00 00 00 b7 08 00 00  |................|
000000a0  02 00 00 00 0f 09 00 00  02 00 00 00 f3 09 00 00  |................|
000000b0  02 00 00 00 20 0b 00 00  01 00 00 00 24 0b 00 00  |.... .......$...|
000000c0  01 00 00 00 26 0b 00 00  02 00 00 00 fb 0b 00 00  |....&...........|
000000d0  02 00 00 00 ff 0b 00 00  01 00 00 00 9a 0c 00 00  |................|
000000e0  01 00 00 00 55 0d 00 00  01 00 00 00 57 0d 00 00  |....U.......W...|
000000f0  01 00 00 00 59 0d 00 00  01 00 00 00 5b 0d 00 00  |....Y.......[...|
00000100  01 00 00 00 5d 0d 00 00  01 00 00 00 6d 0d 00 00  |....].......m...|
00000110  01 00 00 00 78 0d 00 00  01 00 00 00 ac 0d 00 00  |....x...........|
00000120  02 00 00 00 45 0e 00 00  02 00 00 00 47 0e 00 00  |....E.......G...|
00000130  00 00 00 00 9a 0e 00 00  01 00 00 00 e0 0e 00 00  |................|
00000140  01 00 00 00 45 0f 00 00  03 00 00 00 63 0f 00 00  |....E.......c...|
00000150  03 00 00 00 21 10 00 00  01 00 00 00 c4 10 00 00  |....!...........|
00000160  01 00 00 00 c6 10 00 00  03 00 00 00 5b 11 00 00  |............[...|
00000170  00 00 00 00 ec 12 00 00  02 00 00 00 0a 13 00 00  |................|
00000180  03 00 00 00 17 13 00 00  01 00 00 00 65 13 00 00  |............e...|
00000190  01 00 00 00 67 13 00 00  01 00 00 00 86 13 00 00  |....g...........|
000001a0  00 00 00 00 8a 13 00 00  01 00 00 00 94 13 00 00  |................|
000001b0  01 00 00 00 96 13 00 00  00 00 00 00 87 14 00 00  |................|
000001c0  01 00 00 00 0b 15 00 00  00 00 00 00 3c 15 00 00  |............<...|
000001d0  01 00 00 00 43 16 00 00  00 00 00 00 b9 17 00 00  |....C...........|
000001e0  02 00 00 00 cb 17 00 00  02 00 00 00 d9 17 00 00  |................|
000001f0  01 00 00 00 8d 18 00 00  03 00 00 00 b6 18 00 00  |................|
00000200  00 00 00 00 00 00 00 00  01 00 00 00 04 00 00 00  |................|
00000210  08 20 00 00 80 00 00 00  10 00 00 00 c0 01 00 00  |. ..............|
00000220  00 00 00 00 fe ca ad de  00 00 00 00 00 00 00 00  |................|
00000230  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000240  00 00 00 00 00 00 00 00  00 00 00 00 00 00 56 67  |..............Vg|
00000250  00 00 00 00 7b ee d3 7b  64 c5 d9 51 c5 fd 3e 61  |....{..{d..Q..>a|
00000260  14 2b f7 0b 73 7b 44 11  5a 3e 96 42 c5 82 03 0a  |.+..s{D.Z>.B....|
00000270  5e b1 f2 08 4b 23 32 1a  79 d3 0f 3b 63 2f eb 68  |^...K#2.y..;c/.h|
00000280  3b 81 62 49 70 df b6 60  64 ee a5 06 24 06 33 14  |;.bIp..`d...$.3.|
00000290  11 ca ff 7f 9e 70 27 1a  09 11 ea 71 dc 59 0f 10  |.....p'....q.Y..|
000002a0  aa e0 b7 7f d4 5b eb 06  ac d9 6d 6f f2 11 42 09  |.....[....mo..B.|
000002b0  1b 5e 88 00 10 21 27 76  af a8 04 4c 3b 70 16 17  |.^...!'v...L;p..|
000002c0  33 7e e1 14 cd e7 22 32  e3 0e de 74 50 c5 eb 68  |3~...."2...tP..h|
000002d0  48 d6 f6 2d 47 d4 b7 46  15 c3 2a 4a 5c 01 ee 39  |H..-G..F..*J\..9|
000002e0  bb 4f fc 57 6f 01 c1 0c  22 84 f1 43 19 01 ef 60  |.O.Wo..."..C...`|
000002f0  ba 24 f3 26 9b 57 01 7f  7d 30 da 49 f5 a5 55 70  |.$.&.W..}0.I..Up|
00000300  0b 37 b8 5f e1 1e 80 50  1a ac 88 04 1c 01 b8 5f  |.7._...P......._|
00000310  7f 8f a7 6a 23 bd 72 76  f8 5a c7 6f 29 70 5f 6a  |...j#.rv.Z.o)p_j|
00000320  f8 18 5e 7d a4 34 35 5f  1b 82 a1 73 13 77 e6 7d  |..^}.45_...s.w.}|
00000330  b5 55 5c 55 ca 2a a6 3f  4e e7 fc 14 e8 d3 3d 6a  |.U\U.*.?N.....=j|
00000340  98 12 c9 71 32 f6 da 09  38 99 29 53 e0 e8 bf 1f  |...q2...8.)S....|
00000350  79 ca 92 50 4d 5c 54 1d  3d ea ad 59 34 1a 8f 28  |y..PM\T.=..Y4..(|
00000360  bc 5d 15 2a 5f 6e 9f 1d  4e 1b 7e 09 77 82 08 51  |.].*_n..N.~.w..Q|
00000370  fa c5 a0 1c cb 4b 58 53  6c 28 5e 41 05 fd 58 7c  |.....KXSl(^A..X||
00000380  ac 6a d8 23 86 d4 e6 45  21 fe 10 5c 2b fa 7f 0e  |.j.#...E!..\+...|
00000390  aa 91 59 3c 1a 59 d8 4b  55 6a df 78 a2 aa b7 39  |..Y<.Y.KUj.x...9|
000003a0  be 8d 0d 2b 70 ec 80 6c  b5 21 9e 37 73 e3 69 00  |...+p..l.!.7s.i.|
000003b0  3b 17 27 2c 04 09 9b 4c  5c b7 a7 6a d3 29 f0 1d  |;.',...L\..j.)..|
000003c0  36 ff 75 56 94 50 d1 3d  b3 12 b0 3d af c9 08 27  |6.uV.P.=...=...'|
000003d0  e2 ac 25 5b f0 fc 5d 17  e4 e3 97 4f 9e 0a 3b 05  |..%[..]....O..;.|
000003e0  4f 6b fd 34 32 ff 15 59  15 8d 43 56 49 31 9e 51  |Ok.42..Y..CVI1.Q|
000003f0  fd 4a 6e 2c 82 b5 a1 17  4e 2e f7 4d a9 b5 46 50  |.Jn,....N..M..FP|
00000400  74 6f 6f 62 00 00 00 00  01 00 00 00 00 00 00 00  |toob............|
00000410  67 6f 6c 70 01 00 00 00  01 00 00 00 00 00 00 00  |golp............|
00000420  6d 72 76 6e 02 00 00 00  06 00 00 00 00 00 00 00  |mrvn............|
00000430  6d 72 69 66 08 00 00 00  08 00 00 00 00 00 00 00  |mrif............|
00000440  73 79 73 66 10 00 00 00  f8 1f 00 00 00 00 00 00  |sysf............|
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...

Original comment by stefan.b...@web.de on 5 Apr 2013 at 8:29

GoogleCodeExporter commented 9 years ago

yes this is the same issue. can you apply the following patch, run ios_examiner 
on the nand image and also without parameters with the ramdisk connected and 
post both outputs ? thanks a lot.

Original comment by jean.sig...@gmail.com on 7 Apr 2013 at 11:29

Attachments:

vsvfl_debug.patch

GoogleCodeExporter commented 9 years ago

here are the two outputs:

Original comment by stefan.b...@web.de on 8 Apr 2013 at 7:28

Attachments:

GoogleCodeExporter commented 9 years ago

ok, can you put nand_debug.py in the python_scripts folder, run it (with 
ramdisk attached) and post the output. then, apply the nand_dump_test1.patch, 
rebuild the ramdisk and re-run nand_debug.py and see if the output is different.
i'm still in the dark about this bug so expect a lot a back and forth. thanks 
again for your time.

Original comment by jean.sig...@gmail.com on 8 Apr 2013 at 12:07

Attachments:

GoogleCodeExporter commented 9 years ago

I am happy to interate. Here we go:

Original comment by stefan.b...@web.de on 8 Apr 2013 at 4:50

Attachments:

GoogleCodeExporter commented 9 years ago

ok, can you re-run nand_debug.py and repost the output, just to check if some 
part of the output is random or not (use the ramdisk version with the 
nand_dump_test1 patch even though i dont think it has any effect).
also, attached is another script to run as well.
thanks a lot.

Original comment by jean.sig...@gmail.com on 8 Apr 2013 at 5:48

Attachments:

nand_debug2.py

GoogleCodeExporter commented 9 years ago

here is a simple rerun of nand_debug.py with the nand_dump_test1.patch'ed 
ramdisk (nand_debug_out3_afterpatch.txt) and a run of nand_debug2.py on the 
same ramdisk (nand_debug2_out.txt):

Original comment by stefan.b...@web.de on 8 Apr 2013 at 8:52

Attachments:

GoogleCodeExporter commented 9 years ago

this is the weirdest bug ...
here is another test script (nand_debug3.py), if it says checksum OK : False 
then uncomment the time.sleep statement and try again to see if this changes 
anything.
also if you could run again nand_debug.py twice in a row and post both outputs.
at this point i still have no idea how to fix this, it looks like when reading 
sequentially at the time it gets to the 16th block (the first that does not 
uses "bootloader mode"), the current read data somehow gets corrupted by the 
previous : random stripes of FFs appear starting at offset 0x600, (which is the 
effective size of the last bootloader page, hence my "corruption theory"), all 
of this without any ecc error code from the kernel.
anyway thanks again for your help.

Original comment by jean.sig...@gmail.com on 8 Apr 2013 at 9:58

Attachments:

nand_debug3.py

GoogleCodeExporter commented 9 years ago

I'm stuck at the moment as entering DFU model fails (screen with empty progress 
bar below apple at first, now fails with black screen after multiple tries; 
iphone appears to work fine as standalone, but is not recognized as a device by 
redsn0w/iTunes/iPhoto any more); any idea?

Original comment by stefan.b...@web.de on 9 Apr 2013 at 9:25

GoogleCodeExporter commented 9 years ago

thats odd, no USB at all ? when yo say empty progress bar below apple, you mean 
when booting the ramdisk with redsn0w ? if the device is jailbroken and you can 
ssh into it through wifi try looking at the syslog see if theres any indication 
about the usb issue.

Original comment by jean.sig...@gmail.com on 10 Apr 2013 at 8:23

GoogleCodeExporter commented 9 years ago

DFU ok again, i got errors as in issue 84, rebuilding the ramdisk made them 
disappear. 
Here now comes the output of nand_debug3.py, checksum OK: TRUE in both cases; 
also, two consecutive runs of the old nand_debug.py: first run 
(nand_debug_out3a.txt)
left the iphone with indefinite prompting of "Abort dump". An immediate rerun 
of 
the script therefore didn't work (nand_debug_out3b.txt), after reboot through 
ssh
and remounting the ramdisk nand_debug.py yielded a slightly different output 
(nand_debug_out3a.txt).

nand_debug_out3b.txt
nand_debug_out3c.txt

Original comment by stefan.b...@web.de on 10 Apr 2013 at 1:18

Attachments:

GoogleCodeExporter commented 9 years ago

Hi Jean, have you made any progress in understanding this bug? Anything else I 
can help with? Best, Stefan

Original comment by stefan.b...@web.de on 26 Apr 2013 at 6:46

GoogleCodeExporter commented 9 years ago

i still havent quite figured it out. i will write another script soon for you 
to test : it will acquire a new image (with the faulty method), then read each 
page individually and compare it with the dump, to see if this weird error 
happens only on a limited set of pages.

Original comment by jean.sig...@gmail.com on 26 Apr 2013 at 8:53

GoogleCodeExporter commented 9 years ago

ok, here is the script. you have to boot the ramdisk, acquire a new image with 
the ios_examiner nand_dump command (using the same ramdisk as before). Then, 
without rebooting the device run the script :

python nand_check_image.py nand_image plist_file

It will read each page from the image and compare it with the version read 
using the "read single page proxy" that gives the correct results. This might 
take a long time. When it is done, you can post the nand_diff.txt file that 
will be created. If the script output many xxx_yyy lines (say more than 100), 
you can interrupt the script and post that output instead of waiting for the 
full image to be analyzed.
Thanks again.

Original comment by jean.sig...@gmail.com on 9 May 2013 at 11:33

Attachments:

nand_check_image.py

GoogleCodeExporter commented 9 years ago

OK, here are the first few hundred lines of the output of the script: 
python python_scripts/nand_check_image.py iphone4_nand.bin iphone4.plist

It generates many xxx_yyy lines in the output, and generates one file 
xxx_yyy.bin for each line which prevents the script from finishing after a 
while.

Original comment by stefan.b...@web.de on 29 May 2013 at 8:19

Attachments:

output.txt

GoogleCodeExporter commented 9 years ago

ok, so the iphone4_nand.bin was acquired right before running the script right ?
can you post the 2_19456.bin file ?

i've posted another patch here
https://code.google.com/p/iphone-dataprotection/issues/detail?id=72#c32
but seeing the results you posted i'm not sure it will work now :(
thanks

Original comment by jean.sig...@gmail.com on 29 May 2013 at 9:10

GoogleCodeExporter commented 9 years ago

yes, the iphone4_nand.bin was acquired right before running the script. I 
cannot post the 2_19456.bin as I deleted the millions of .bin files to unclog 
my file system. Would you like me to do a redump to get you that file?

Original comment by stefan.b...@web.de on 29 May 2013 at 12:45

GoogleCodeExporter commented 9 years ago

don't bother, if you can try the patch in the last comment in issue 72.
thanks.

Original comment by jean.sig...@gmail.com on 29 May 2013 at 5:37

GoogleCodeExporter commented 9 years ago

Guys help me I bought I phone 5c legitimate gys. Probles is wen I reformat d 
thing asking for a icloud acout . Unfortunately I cannot longer contact the 
owner. Its not jail broken yet. Is there a free way to activate this phone?

Original comment by bushyh...@gmail.com on 14 Feb 2015 at 6:30

learntofly83 / iphone-dataprotection

ios_examiner.py: another AssertionError #86