Tripcodes

How are tripcodes generated?

some kind of hashing algorithm

>>2
wow, thanks for the extremely specific description

excellent post!

>>3
no problem

Are you writing a textboard software?

>>5
no, I want to write a tripcode finder

I know there are plenty of good ones already, but I want to write my own

>>6
The algorithm is:
1. convert the input to Shift JIS. (you can skip that if you don't need japanese tripcodes)
2. Generate the salt as follows:
- Take the second and third characters of the string obtained by appending H.. to the end of the input.
- Replace any characters not between . and z with ..
- Replace any of the characters in :;<=>?@[\]^_` with the corresponding character from ABCDEFGabcdef
3. Call the crypt() function with the input and salt.
4. Return the last 10 characters.

You need the old Unix crypt function (DES), see man 3 crypt.

shiichan's code:
$salt = strtr(preg_replace("/[^\.-z]/",".",substr($trip."H.",1,2)),":;<=>?@[\]^_`","ABCDEFGabcdef");
$trip = substr(crypt($trip, $salt),-10);

>>7

(you can skip that if you don't need japanese tripcodes)

wrong, some japanese input leads to non-japanese output

i.e. if you want a tripcode like !hurrdurr123 or whatever, the input might actually need to be something like #cませAe^7FQ

I know that because I used to use MTY back in the day for hardware-accelerated tripcode finding

but thanks for the rest of the info

hi

>>9
hello

>>9
check my dubs

>>11
checked