ERROR: --pw-skip value is bigger than max combinations on left side

[ssjtoma]

Hi all,
I'm trying to coordinate a brute-force attempt across 4 machines with --pw-skip and --pw-limit. The password I'm trying to brute-force is 8 char long so there are 6634204312890625 combinations, so machine one would go up to 1658551078222656, second from there etc.

Unfortunately when I try:
./cudaHashcat-lite64.bin --gpu-accel=320 --gpu-loops=1024 --gpu-async --pw-min=8 --pw-skip=1658551078222656 --pw-limit=3317102156445313 2aa0c885f65fa303a835d14160f64799 -1 ?l?u?s?d ?1?1?1?1?1?1?1?1

I get an error: ERROR: --pw-skip value is bigger than max combinations on left side

I checked the forum, the manual and asked on IRC for help as well, but so far no luck. If anyone has any info on this, please post it here!

Thanks!

[atom]

no sorry, it does not work this way, that simple

[ssjtoma]

no sorry, it does not work this way, that simple

OK, then my question would be how to coordinate a brute-force across multiple machines so that the machines don't perform duplicate computations? Is it possible?

[Rolf]

Simple!
Blandy was the first one to actually use it:
Say, you have a mask, -1 ?l?d ?1?1?1?1?1?1 ?1?1?1?1 .
And 4 machines with GPUs.
Then you divide the ?l?d keyspace by 4, and use something like
-1 ?l?d -2 012345678 ?2?1?1?1?1?1 ?1?1?1?1 on machine1
-1 ?l?d -2 9abcdefgh ?2?1?1?1?1?1?1 ?1?1?1?1 on machine2
etc.

Got it?

[ssjtoma]

Simple!
Blandy was the first one to actually use it:
Say, you have a mask, -1 ?l?d ?1?1?1?1?1?1 ?1?1?1?1 .
And 4 machines with GPUs.
Then you divide the ?l?d keyspace by 4, and use something like
-1 ?l?d -2 012345678 ?2?1?1?1?1?1 ?1?1?1?1 on machine1
-1 ?l?d -2 9abcdefgh ?2?1?1?1?1?1?1 ?1?1?1?1 on machine2
etc.

Got it?

Thanks, I was thinking of doing
1st machine: -1 ?l?d?s?u ?1?1?1?1?1?1?1?l
2nd machine: -1 ?l?d?s?u ?1?1?1?1?1?1?1?u
3rd machine: -1 ?l?d?s?u ?1?1?1?1?1?1?1?s
..

which is along the same line of thought =)

[Rolf]

Yep!

[mrleau]

Can you explain how to use --pw-skip and --pw-limit? From the description they seem better suited for distribution processing than using custom charset and masks.

no sorry, it does not work this way, that simple

[atom]

no, sorry. i recommend sticking to mask based distribution.