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+--- Thread: which is the correct salt file format? (/thread-943.html)
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which is the correct salt file format? - tlc - 02-21-2012
Hi,
I have a single password (00000000) and its' corresponding SHA256 hash (CAE201A8B791CA25B81B04876CACD62897883EE4C1907D2BD51D5671FEEC7562) and I am trying to find the salt. I expect that the salt is 8 bytes long and that each byte can vary from 00 to 09. So I have generated a salt file consisting in 8 byte combinations of 00-09 values. Examples:
0000000000000000
0000000000000001
0000000000000002
....
0107010003000207
0107010003000208
0107010003000209
.....and so on
Next, I fire up the hashcat command (trying to feed the salts to the single hash):
Code:
./hashcat-cli32.bin --bf-cs-buf=0 --bf-pw-min=8 --bf-pw-max=8 -m 1400 --salt-file=salt.txt --attack-mode=3 hash.txtbut I notice that the salts are NOT used:
Code:
Initializing hashcat v0.38 by atom with 8 threads and 32mb segment-size...
NOTE: press enter for status-screen
Added hashes from file ../cod.txt: 1 (1 salts)
Activating quick-digest mode for single-hash
Charset...: 0
Length....: 8
Index.....: 0/1 (segment), 1 (words), 0 (bytes)
Recovered.: 0/1 hashes, 0/1 salts
Speed/sec.: - plains, - words
Progress..: 1/1 (100.00%)
Running...: --:--:--:--
Estimated.: --:--:--:--
Started: Tue Feb 21 13:24:54 2012
Stopped: Tue Feb 21 13:24:55 2012Wham am I doing wrong and how can I feed the salt file to the program?
Also how can I tell the program the format for the password and salt? (salt-password or password-salt)
Regards,
Cristian
RE: which is the correct salt file format? - atom - 02-21-2012
Is the salt left or right side of the plaintext?
RE: which is the correct salt file format? - mastercracker - 02-21-2012
The quick answer is probably that since the mode 1400 don't use salts, the salt file does not get loaded and used. As for a solution for this, you could try oclHashcat-plus with rules that prepend or append your salts. However the problem would be the length so I don't have a real solution.
RE: which is the correct salt file format? - tlc - 02-21-2012
@atom: the plaintext represents only the salts (each per row):
Code:
root@tlc2:/root/samsung_xcover $ head -4 salt.txt
0000000000000000
0000000000000001
0000000000000002
0000000000000003am I making a mistake here?
@mastercracker: the problem is that I don't possess a compatible GPU that would enable the use of oclHashcat... so I have to do it using hashcat...
thank you for your fast answers!
RE: which is the correct salt file format? - atom - 02-21-2012
you said something about 8 byte salts but each line of your salt.txt has 16 byte.
please also not that hashcat is not able to do hex-salts - only oclHashcat-* can do that.
RE: which is the correct salt file format? - tlc - 02-21-2012
Yes, I used the hex format for the salt file (two characters for one byte). I didn't know that it does not work with hashcat...
Is there any way in which I could feed "binary" salts to hashcat? (more like a hybrid text-binary file, in which each line consists of 8 bytes with 0 to 9 ASCII values in it).
thank you
RE: which is the correct salt file format? - atom - 02-21-2012
only 1 to 9
RE: which is the correct salt file format? - tlc - 02-22-2012
Thank you.
To verify that I understood you right, could you tell me if my statements are correct (inside the following image)?
http://s13.postimage.org/z9uro03mf/binary_salts.jpg
RE: which is the correct salt file format? - atom - 02-22-2012
looks good
RE: which is the correct salt file format? - tlc - 02-23-2012
Ok. I borrowed an AMD HD 5550 video card, so now I can use oclHashcat.
Please advise how the proper command line should look in order to crack this one:
- a SHA256 hash (such as CAE201A8B791CA25B81B04876CACD62897883EE4C1907D2BD51D5671FEEC7562)
- with an appended salt of Hex value 00 00 00 00 00 00 00 00 (8 bytes with 0 ASCII value)
- with decimal charset
- password length: 8 chars
How should I specify the above-mentioned salt to the program? I can only find the --hex-salt option, but no parameter to feed the salt...
thank you