Password Construction Location?

Hi all,

I'm trying to find where the construction of each password used to generate each guess is located in the source. I want to allow multi character insertions instead of building the password char by char. I'm aware this will likely have a detrimental effect on speed.

The whole idea is to use graphemes to construct the password and graphemes can be up to 4 characters long. Then I can use a list of graphemes as a charset.

But first step is finding where the passwords are constructed in hashcat.

Thanks