I'm trying to make a script that will unzip a password protected file, the password being the name of the file that I will get when unzipping

Eg.

• file1.zip contains file2.zip and its password is file2.
• file2.zip contains file3.zip and its password is file3

How do I unzip file1.zip, and read the name of file2.zip so it can be entered in the script?

Here's a screenshot of the command line:

root@kaliVM:~/Desktop# unzip 49805.zip  
Archive:  49805.zip  
[49805.zip]  13811.zip password:  

I just need Bash to read that output in order to know the new password (In this case the password is 13811).

Here's what I've done so far

#!/bin/bash

echo First zip name:
read firstfile


pw=$(zipinfo -1 $firstfile | cut -d. -f1)
nextfile=$(zipinfo -1 $firstfile)
unzip -P $pw $firstfile

rm $firstfile
nextfile=$firstfile

Now how can I make it do the loop?