This is a small Windows Forms educational project demonstrating basic cryptography primitives and a local messaging UI. It is intended for learning and demonstration in a controlled environment.

Features

• Login and simple user management (stored in evilcorp.db).
• Chat UI with selectable encryption algorithms (Caesar, Affine, Hill).
• Encrypt / Decrypt tester to try algorithms and keys.
• Dashboard with Profile, Send Messages, Encrypt/Decrypt, and Attack (demo-only) sections.
• Password storage migrated to SHA-256 hashing with a migration utility (see DatabaseManager.MigratePlaintextPasswordsToHash).

Seeded accounts (for testing)

• mehdi / 234
• anis / 54321
• ramy / #esst#
• sarah / 222
• amir / 99999
• sami / 11111
• yousef / yousef123
• malik / 55555
• sonia / sonia03!#
• boulkrinate / !@samia001
• yousra / 432
• lotfi / helloworld!

Security measurements added

• Confirm dialogues on sensitive actions: logout, profile edits, and revealing stored password/hash.
• Profile edits require entering current password to authorize username/password changes.
• Registration only requires username and password; duplicate usernames are rejected.
• Passwords in the database are stored in the PasswordHash column. Depending on the project state the value may be plaintext, ROT13, or an SHA-256 hex digest — do not assume plaintext in production.
• The Reports view is embedded in the Dashboard as a guarded section (placeholder) — a PDF viewer can be added here later.

Warning

• The seeded account list and their passwords above are present in this README and the local database for demo/testing only. This is insecure for production. Remove test accounts and do not publish real credentials.

Security & Ethics

• This project is educational. Real offensive functionality (brute-force/dictionary/MITM) is disabled or removed.
• Passwords are stored as SHA-256 hashes in the database. For real applications use a slow KDF (PBKDF2/Argon2/Bcrypt) with per-user salts.

Run locally

1. Install .NET SDK (recommended .NET 8).
2. Open a terminal in the repository root.
3. Restore and build:
   • dotnet nuget locals --clear all
   • dotnet restore
   • dotnet build
4. Run:
   • dotnet run --project EvilCorp

Repository notes

• Main code is in the EvilCorp/ folder. Designer files define the Windows Forms UI.
• Database file evilcorp.db is created in the repo root on first run.

If you encounter package restore errors, try clearing local NuGet caches and ensure internet connectivity. If a package fails to restore, I can update the project to use a different provider or help fix the specific restore error.

License

• Educational/demo only.

Contact

• This project was modified by an automated assistant (GitHub Copilot) per user requests.