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-   -   Is this firmware a XOR encryption? how to decrypted it and unpack it? (https://www.linuxquestions.org/questions/linux-embedded-and-single-board-computer-78/is-this-firmware-a-xor-encryption-how-to-decrypted-it-and-unpack-it-4175440925/)

chinabenjamin66 12-11-2012 02:04 AM
Is this firmware a XOR encryption? how to decrypted it and unpack it?
 
Hello friends,



It is a firmware of TOUCHLET 4,3" Pocket-Media-Tablet "PMT-43.WiFi" mit Android 2.3.

Code:
root@vm:# file ePDKv100.img
ePDKv100.img: data
root@vm:# hexdump -C ePDKv100.img | more
00000000  2a 99 a2 80 46 d0 63 98  24 a2 62 04 93 1e 03 95  |*...F.c.$.b.....|
00000010  ed 17 c6 69 48 88 f0 53  10 d6 c6 74 17 16 86 fc  |...iH..S...t....|
00000020  14 4a d3 68 69 c3 4d a3  a2 9b 3c ae 35 59 90 1b  |.J.hi.M...<.5Y..|
00000030  a0 99 c6 20 f3 c4 b5 b0  5e 2c 23 67 8f 44 cb 5f  |... ....^,#g.D._|
00000040  bd b3 af 19 7d 3c 55 5b  63 62 5d 20 43 7a 37 2c  |....}<U[cb] Cz7,|
00000050  00 a1 44 e9 90 39 e4 91  40 f1 a4 59 10 c9 84 41  |..D..9..@..Y...A|
00000060  00 c1 84 49 10 d9 a4 71  40 11 e4 b9 90 69 44 21  |...I...q@....iD!|
00000070  00 e1 c4 a9 90 79 64 51  40 31 24 19 10 09 04 01  |.....ydQ@1$.....|
00000080  00 01 04 09 10 19 24 31  40 51 64 79 90 a9 c4 e1  |......$1@Qdy....|
00000090  00 21 44 69 90 b9 e4 11  40 71 a4 d9 10 49 84 c1  |.!Di....@q...I..|
000000a0  00 41 84 c9 10 59 a4 f1  40 91 e4 39 90 e9 44 a1  |.A...Y..@..9..D.|
000000b0  00 61 c4 29 90 f9 64 d1  40 b1 24 99 10 89 04 81  |.a.)..d.@.$.....|
000000c0  00 81 04 89 10 99 24 b1  40 d1 64 f9 90 29 c4 61  |......$.@.d..).a|
000000d0  00 a1 44 e9 90 39 e4 91  40 f1 a4 59 10 c9 84 41  |..D..9..@..Y...A|
000000e0  00 c1 84 49 10 d9 a4 71  40 11 e4 b9 90 69 44 21  |...I...q@....iD!|
000000f0  00 e1 c4 a9 90 79 64 51  40 31 24 19 10 09 04 01  |.....ydQ@1$.....|
00000100  00 01 04 09 10 19 24 31  40 51 64 79 90 a9 c4 e1  |......$1@Qdy....|
00000110  00 21 44 69 90 b9 e4 11  40 71 a4 d9 10 49 84 c1  |.!Di....@q...I..|
00000120  00 41 84 c9 10 59 a4 f1  40 91 e4 39 90 e9 44 a1  |.A...Y..@..9..D.|
00000130  00 61 c4 29 90 f9 64 d1  40 b1 24 99 10 89 04 81  |.a.)..d.@.$.....|
00000140  00 81 04 89 10 99 24 b1  40 d1 64 f9 90 29 c4 61  |......$.@.d..).a|
00000150  00 a1 44 e9 90 39 e4 91  40 f1 a4 59 10 c9 84 41  |..D..9..@..Y...A|
00000160  00 c1 84 49 10 d9 a4 71  40 11 e4 b9 90 69 44 21  |...I...q@....iD!|
00000170  00 e1 c4 a9 90 79 64 51  40 31 24 19 10 09 04 01  |.....ydQ@1$.....|
00000180  00 01 04 09 10 19 24 31  40 51 64 79 90 a9 c4 e1  |......$1@Qdy....|
00000190  00 21 44 69 90 b9 e4 11  40 71 a4 d9 10 49 84 c1  |.!Di....@q...I..|
000001a0  00 41 84 c9 10 59 a4 f1  40 91 e4 39 90 e9 44 a1  |.A...Y..@..9..D.|
You can download it from this link:
http://pan.baidu.com/share/link?shar...&uk=1997156502

Any ideas will be appreciated.

unSpawn 12-11-2012 05:34 AM
Quote:
Originally Posted by chinabenjamin66 (Post 4846765)
Is this firmware a XOR encryption?
Generally speaking you could compare entropy and histograms and use tools like xortool xor-analyze.


Quote:
Originally Posted by chinabenjamin66 (Post 4846765)
how to decrypted it and unpack it?
Depending on the license the product and or firmware are provided under that may or may not be a topic suitable for LQ. Please clarify.

*I also strongly suggest you only link to official download pages for firmware and not use free file hosting providers. That way vendor information should be clear without having to ask for it and there should be no question about the accessibility and validity of these files.


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