Corrupted luks partition, help needed

Panagiotis Malakoudis <malakudi@xxxxxxxxx> · Thu, 3 Jun 2010 18:32:08 +0300

I have a luks partition which was corrupted by failed disk i/o. 
Examining the partition, the first 512 bytes of the LUKS header is 
correct, then there is a corruption which I am not really sure how many 
sectors affected. Giving the correct key always returns: "No key 
available with this passphrase.". Since the first 512 bytes are correct,
 I guess all key information is unharmed. Is there a way to decrypt the 
partition, even loosing some sectors of data?

Various logs follow:
cryptsetup luksDump /dev/sdd3
LUKS header
 information for /dev/sdd3

Version:           1
Cipher name:  
     aes
Cipher mode:       cbc-essiv:sha256
Hash spec:         
sha1

Payload offset:    2056
MK bits:           256
MK digest:         
8a 87 ad 0e a4 39 ce cd 26 68 a3 e4 59 90 1c c9 d7 bc d1 e7 
MK 
salt:           28 b2 e9 f6 dc 6a 15 34 a4 e5 e4 b2 fa de e1 68 

     fd af 95 61 27 29 87 72 c8 f7 8f 9c 0f 61 54 bf 

MK iterations:     10
UUID:              ca429424-f599-48f5-8c91-0a1a724e912f

Key
 Slot 0: ENABLED
    Iterations:             93533

Salt:                   45 fb 1e 03 3d 4e 4f c0 81 bd 1f 62 2c 2b e4 2c 

                              46 11 57 a6 c3 83 a5 7c 82 de a6 9c 88 a1 
70 a4 
    Key material offset:    8
    AF stripes:            
    4000
Key Slot 1: DISABLED
Key Slot 2: DISABLED
Key Slot 3: 
DISABLED

Key Slot 4: DISABLED
Key Slot 5: DISABLED
Key Slot 6: DISABLED
Key
 Slot 7: DISABLED

00000000  4c 55 4b 53 ba be 00 01  61 65 73 00 00 00 00 00  |LUKS....aes.....|
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000020  00 00 00 00 00 00 00 00  63 62 63 2d 65 73 73 69  |........cbc-essi|

00000030  76 3a 73 68 61 32 35 36  00 00 00 00 00 00 00 00  |v:sha256........|
00000040  00 00 00 00 00 00 00 00  73 68 61 31 00 00 00 00  |........sha1....|
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

00000060  00 00 00 00 00 00 00 00  00 00 08 08 00 00 00 20  |............... |
00000070  8a 87 ad 0e a4 39 ce cd  26 68 a3 e4 59 90 1c c9  |.....9..&h..Y...|
00000080  d7 bc d1 e7 28 b2 e9 f6  dc 6a 15 34 a4 e5 e4 b2  |....(....j.4....|

00000090  fa de e1 68 fd af 95 61  27 29 87 72 c8 f7 8f 9c  |...h...a').r....|
000000a0  0f 61 54 bf 00 00 00 0a  63 61 34 32 39 34 32 34  |.aT.....ca429424|
000000b0  2d 66 35 39 39 2d 34 38  66 35 2d 38 63 39 31 2d  |-f599-48f5-8c91-|

000000c0  30 61 31 61 37 32 34 65  39 31 32 66 00 00 00 00  |0a1a724e912f....|
000000d0  00 ac 71 f3 00 01 6d 5d  45 fb 1e 03 3d 4e 4f c0  |..q...m]E...=NO.|
000000e0  81 bd 1f 62 2c 2b e4 2c  46 11 57 a6 c3 83 a5 7c  |...b,+.,F.W....||

000000f0  82 de a6 9c 88 a1 70 a4  00 00 00 08 00 00 0f a0  |......p.........|
00000100  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000110  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

00000120  00 00 00 00 00 00 00 00  00 00 01 08 00 00 0f a0  |................|
00000130  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000140  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

00000150  00 00 00 00 00 00 00 00  00 00 02 08 00 00 0f a0  |................|
00000160  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000170  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

00000180  00 00 00 00 00 00 00 00  00 00 03 08 00 00 0f a0  |................|
00000190  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

000001b0  00 00 00 00 00 00 00 00  00 00 04 08 00 00 0f a0  |................|
000001c0  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

000001e0  00 00 00 00 00 00 00 00  00 00 05 08 00 00 0f a0  |................|
000001f0  00 00 de ad 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000200  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

00000210  00 00 00 00 00 00 00 00  00 00 06 08 00 00 0f a0  |................|
00000220  00 00 de ad 00 00 00 00  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 07 08 00 00 0f a0  |................|

this shouldn't be here, so this is where corruption starts!!!!

00000250  13 8e 3c 67 f5 3e 82 c4  12 d4 8f e6 31 9b 84 89  |..<g.>......1...|

00000260  27 79 e1 f5 1a e3 15 5e  94 a1 c3 6e b0 57 33 8e  |'y.....^...n.W3.|
00000270  b0 58 bb 21 f9 c3 10 11  59 d0 28 1e a6 7b f2 ce  |.X.!....Y.(..{..|
00000280  7c b3 2e d6 51 0f 68 d0  df 83 e4 52 3e 3b ad 2f  ||...Q.h....R>;./|

00000290  c6 05 8d a5 92 a2 a2 8a  bc c6 4f 22 a4 a6 a9 dc  |..........O"....|
000002a0  3b 1d 41 85 41 7f 5d e9  60 6f f2 e1 b3 a5 99 c3  |;.A.A.].`o......|
000002b0  31 f7 d9 64 cc e6 42 43  ad b7 5f 62 ca fa a8 dd  |1..d..BC.._b....|

000002c0  fd bc 45 8b 2a 98 7d c2  0f 4b 07 a3 1a 08 1b 45  |..E.*.}..K.....E|
000002d0  91 9e 3d fe 24 de 72 91  fe e9 5c 99 c9 d8 0c 71  |..=.$.r...\....q|
000002e0  32 e8 cb df 01 67 4f dc  72 fe a8 d5 57 f2 4c 2b  |2....gO.r...W.L+|

000002f0  46 4a 9c 08 d4 ba 3a 3e  78 7a e6 ca b4 e8 5f a4  |FJ....:>xz...._.|
00000300  61 4f 87 0c 79 e8 dc 13  e9 65 92 ed 9d f4 f7 3c  |aO..y....e.....<|
00000310  9f d6 35 eb 10 7a ab 72  a7 c6 05 91 2e 44 60 f2  |..5..z.r.....D`.|

00000320  9a 0e f2 b1 b2 93 1b ba  49 c6 c4 98 cf 31 ec 28  |........I....1.(|
00000330  27 99 2c 3a 2f 74 6f 95  40 3b a8 1c f8 18 3e 27  |'.,:/to.@;....>'|
00000340  79 12 ad 79 f6 8f df 58  3d 1a 6c c5 e0 c4 8c f6  |y..y...X=.l.....|

00000350  7b c1 3d e4 9a 34 15 43  39 48 e0 25 e8 e5 53 f2  |{.=..4.C9H.%..S.|
00000360  80 0c a9 7e 45 59 e0 ef  0a 0f d4 f3 03 ce 1a 23  |...~EY.........#|
00000370  e7 72 b9 c2 aa 86 bd ad  c9 f5 f9 cf 54 8e 4a 5d  |.r..........T.J]|

00000380  35 db f0 5f 93 f1 84 10  f9 bc 1f ab 59 49 0b d7  |5.._........YI..|
00000390  30 ca 9f 00 59 7c 49 b2  1d e7 81 ec eb 72 72 2d  |0...Y|I......rr-|
000003a0  ac 05 ca d5 8d 8a 2f 8a  e0 4c f2 1d b6 7d 9e eb  |....../..L...}..|

000003b0  26 d0 c7 ce c0 b0 65 23  2f 63 04 d1 1b 5f 98 8d  |&.....e#/c..._..|
000003c0  02 3a be 57 4f 96 a2 b4  e1 cb e3 83 e5 b4 fc 49  |.:.WO..........I|
000003d0  fe 30 6a e6 2e 19 76 1e  30 28 63 9d e2 83 67 51  |.0j...v.0(c...gQ|

000003e0  29 93 02 1f 3c 81 a5 f7  34 af 03 a6 a5 ed 10 1a  |)...<...4.......|
000003f0  f5 64 f2 5c 75 67 3e 05  e2 9b 60 b2 b6 c3 73 38  |.d.\ug>...`...s8|
00000400

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