Is it possible to direct users to a certain post based on a password entered on the home page?

I’d like to be able to have a workflow that works like so:

1. Create a post and assign it a password
2. Have a single-field form on the home page
3. User enters password on home page, and is sent to the corresponding post

Does anyone know if this is possible?

Yes, but you’ll need to hold the details of how a password maps to a post.

So:

• store mappings somewhere, easiest as a hash/key-value pair (password->post_id)
• get password from field
• determine post_id, and construct the URL
• use wp_redirect() to redirect the user.