Credential Playground

Overview

This is a mock UNIX shell with a user management system written in rust. I built it as an educational project to better understand password and user management. The shell features extendable permission based commands, secure user operations, and hash + salt secret storage.

Details

Auth Library

The authentication library provides:

• Hand-rolled Hashing
  • Custom SHA256-iter implementation (Educational only, not for production use)
  • OS-based salt generation for use in hashes
• Credential Database
  • Database for storing, loading, and saving hashed passwords in a /etc/passwd styled format
  • Methods for CRUD password operations + hashed comparisons
  • Secure input on the commandline

Interactive Shell

The REPL shell is managed by an environment struct that holds user information, the command registry, and the credentials backend. Commands are extensible by design, with a standard structure for permissions, calling convention, and help messages. Commands have permission levels that enforce access control for logged out, user, and root.

Supported Commands