Cloud EC2 to Brute WPA2 with crunch

[Str8fe]

Hey all,

So I have read some articles about cracking WPA/2 using cloud EC2 instance from Amazon. I decided to give a wack at my own router to test it's proficiency. I have my current key set at 10 characters.. so was going to use crunch 10 10 but let's say I have my wife set the password to an unknown character amount not exceeding 20. Could I then use crunch 20 20 and pipe it through hoping it will spit out a 14 character password or a password <=20?
I'm not too familiar with this, does setting crunch at 10 10 or 20 20 ect.. mean they only check that char amount exactly? I'm still going to use cloud to test against the 10 char password but I was just curious.

TIA,
Str8fe

[TAPE]

No,

To check all possiblities from 10 characters upto 20 characters it would be 10 20 ;

./crunch 10 20 -f charset.lst mixalpha-numeric-all-space | blah blah

[Str8fe]

Hey Tape!
I often check out your forum! You have written some amazing stuff, thanks!
Thanks also for the quick reply!