ManyCam Pro offers a wide range of features that make it a versatile tool for various applications:
| Dependency | Details | |------------|---------| | Licensing Server | Must expose an endpoint to generate signed payloads (RSA‑2048). | | Public Key Distribution | The public key must be bundled securely; any leakage reduces tamper‑proofness. | | Legacy Users | Users on versions < 3.0 will see an “unsupported file format” message; we need a migration path. | | Regulatory | If the serial is considered a “software asset”, storing it in a plain file may conflict with certain corporate policies – encryption option mitigates this. |
Mitigation:
Most commercial software stores its activation data in the Windows Registry or encrypted binary blobs. ManyCam, however, opted for a human‑readable text file for a few practical reasons:
| Reason | Explanation | |--------|-------------| | Portability – The file can be copied to a new PC, letting power users migrate their license without re‑entering the key. | No need to reinstall or call support. | | Transparency – Users can verify that the key they entered matches what ManyCam sees. | Helpful for troubleshooting “license not recognized” errors. | | Simplicity – Developers can quickly test the licensing flow by editing a text file during QA. | Faster iteration on the activation code. | ManyCam-Pro-3.1.43.4086 Serial.txt
Security Note: The file is not encrypted, but it’s not a master key either. ManyCam validates the serial against a server‑side database, and the file also contains a checksum that prevents casual tampering. Still, treat it like any other license credential—don’t post it publicly.
| NFR | Requirement |
|-----|-------------|
| NFR‑1 | Security – No plaintext serial is ever written to disk except inside the controlled Serial.txt file. All in‑memory handling must use SecureString. |
| NFR‑2 | Performance – Import/Export must complete < 200 ms on a typical Windows 10/11 machine. |
| NFR‑3 | Localization – All UI strings must be translatable (currently EN, FR, DE, ES). |
| NFR‑4 | Accessibility – Buttons must be keyboard‑focusable and have ARIA labels. |
| NFR‑5 | Compliance – The file must not contain any PII besides the license key. |
| NFR‑6 | Scalability – The same file format will be reused for future ManyCam versions (major version number only changes). | ManyCam Pro offers a wide range of features
| # | Given | When | Then |
|---|-------|------|------|
| AC‑1 | A user places a correctly signed ManyCam‑Pro‑3.1.43.4086 Serial.txt next to the exe | The app auto‑detects it | The license becomes active, UI shows “License Valid – expires SIGNATURE) | The parser runs | UI shows ERR_FORMAT and no activation occurs. |
| AC‑3 | A user clicks Export and chooses a folder | The app writes a file with all four keys, valid signature | The file can be re‑imported on another machine with 100 % success. |
| AC‑4 | A user selects Encrypt and supplies passphrase “P@ss123” | Exported file is AES‑256‑GCM encrypted | Importing without the correct passphrase returns ERR_DECRYPT_FAIL. |
| AC‑5 | Any import or export occurs | The audit log entry is written | Log line contains timestamp, machine name, action (IMPORT/EXPORT), and result (OK/error code). |
| AC‑6 | The signature on a file is tampered (e.g., one character changed) | Import is attempted | Verification fails, UI shows ERR_SIG_INVALID. |
| AC‑7 | License is expired (Expiry < today) | Import is attempted | UI shows “License expired on
public static void Log(string action, string outcome)
var line = $"DateTime.UtcNow:O
Open the file with Notepad (Windows) or TextEdit (macOS) and you’ll see something like: Most commercial software stores its activation data in
# ManyCam Pro License File
# Generated on 2021-03-15 09:12:07 UTC
Serial=ABCD-EFGH-IJKL-MNOP-QRST
Checksum=5f2e1b9c3a8d4e6f
# End of File