need help with sha512 - Printable Version

need help with sha512 - Printable Version

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need help with sha512 - Gelle - 07-08-2012

Before I'll start testing all my pw's I want to get used in this programm.

So I tryed the examples in cudaHashcat-lite64 and there were no problems.
After this I imagined a pw with 8 chars and only small letters and numbers and I generated a sha512hash with cain's HashCalculator to test this one, but I did not succeed.

My Hash:

Quote:25F047A2BCE22366FBEBAD14EDC14E9BE33CA57FECE7F806253D76686E60D0884C7A38CC5845DDD4C55C495749EE1DC16B938BB739D99FE3966BA0F734E73294

My batch:

Code:
cd C:\Users\Gelle\Desktop\oclHashcat-lite-0.10

cudaHashcat-lite64 -m 1700 25F047A2BCE22366FBEBAD14EDC14E9BE33CA57FECE7F806253D76686E60D0884C7A38CC5845DDD4C55C495749EE1DC16B938BB739D99FE3966BA0F734E73294 -1 ?l?d ?1?1?1?1?1?1?1?1

pause

and the output:

Code:
C:\Users\Gelle\Desktop\oclHashcat-lite-0.10>cudaHashcat-lite64 -m 1700 25F047A2B

CE22366FBEBAD14EDC14E9BE33CA57FECE7F806253D76686E60D0884C7A38CC5845DDD4C55C49574

9EE1DC16B938BB739D99FE3966BA0F734E73294 -1 ?l?d ?1?1?1?1?1?1?1?1

cudaHashcat-lite v0.10 by atom starting...

Password lengths range: 1 - 55

Watchdog: Temperature abort trigger set to 90c

Watchdog: Temperature retain trigger set to 80c

Device #1: GeForce GTX 275, 896MB, 1404Mhz, 30MCU

[s]tatus [p]ause [r]esume [q]uit => ERROR: cuLaunchKernel() 701

C:\Users\Gelle\Desktop\oclHashcat-lite-0.10>pause

DrÃ¼cken Sie eine beliebige Taste . . .

I don't want you to crack my hash, because it's imagined anyway, but it would be nice if you can tell me, what I was doing wrong.

RE: need help with sha512 - epixoip - 07-08-2012

Command is fine. Problem is cuLaunchKernel() returned 701, which is CUDA_ERROR_LAUNCH_OUT_OF_RESOURCES. You might be able to get it to run with a lower -n value.

RE: need help with sha512 - Gelle - 07-08-2012

Code:
cd C:\Users\Gelle\Desktop\oclHashcat-lite-0.10

cudaHashcat-lite64 -m 1700 -n 8 

25F047A2BCE22366FBEBAD14EDC14E9BE33CA57FECE7F806253D76686E60D0884C7A3

8CC5845DDD4C55C495749EE1DC16B938BB739D99FE3966BA0F734E73294 -1 ?l?d 

?1?1?1?1?1?1?1?1

pause

I tryed -n 1, 8, 40, 160
I read a value of 80 is default.
nv dirver is the latest one
also tryed different loops and gpu-async in some different compinations

Code:
cd C:\Users\Gelle\Desktop\oclHashcat-lite-0.10

cudaHashcat-lite64 -m 1700 -n 80 --gpu-loops=128 --gpu-async 25F047A2BCE22366FBEBAD14EDC14E9BE33CA57FECE7F806253D76686E60D0884C7A38CC5845DDD4C55C495749EE1DC16B938BB739D99FE3966BA0F734E73294 -1 ?l?d ?1?1?1?1?1?1?1?1

pause

System:
Q9400 @3,2
GTX275

RE: need help with sha512 - epixoip - 07-08-2012

probably time to upgrade then.

RE: need help with sha512 - Gelle - 07-08-2012

You mean Hardware, aren't you?
Software is up to date.

But I do not understand, why there is no problem with normal md5 and on the other side sha512 isn't working.

RE: need help with sha512 - epixoip - 07-08-2012

yes, i mean hardware. the problem is sha512 requires much more vram than the other hash types, hence the out of resources error.

RE: need help with sha512 - Gelle - 07-08-2012

Wel, didn't thaught 896MB won't be enough, but actually they are.

There is one other question I have:
I read something about the sha hashes, stored in linux's shadow file. I use the same pw on all my systems. Whereas I cracked my win-pw in some seconds I had no luck with my linux system (but its the same pw).

As I understand, the sha512 hash on linux is salted and converted in a non hex string. Can I just convert this salted non hex string to a hex-string (with cain's hexconverter) and use hashcat on this string, or isn't this working.

Maybe you can tell me a tutorial on how to convert linux hash strings

Thanks

PS: I was quiet fascinated on how hashcat cracked th win-pw within seconds wheras cain's cpu based brute-force ist still working. I compared the speed's and found out that gpu based cracking is up to 150 times faster on my system.

RE: need help with sha512 - epixoip - 07-08-2012

sha512 hashes in linux shadow file is actually sha512crypt, not raw sha512.

RE: need help with sha512 - Gelle - 07-08-2012

well but is there a way to work with this hash? Can you decrypt this sha512crypt to a normal sha512hash?

RE: need help with sha512 - undeath - 07-08-2012

no. crypt uses PBKDF2.