PasswordGenerator

1. Overview

The PasswordGenerator.cpp file is a Password generator implementation in BastionGuard.

Generates passwords from unambiguous character sets, guarantees representation of each enabled class, fills the remaining length, and shuffles the result.

The documentation below is generated from the supplied source and covers its API surface, runtime responsibilities, data flow, filesystem or command interactions, concurrency model, and security considerations.

2. Source Inventory

  • Original path: password_manager/PasswordGenerator.cpp
  • Language: C++
  • Source type: .cpp
  • Line count: 94
  • SHA-256: 48c45118181a1bebfb881d7d95026f610e47cba8a8f962a6f2a601487b7be1d3

3. Dependencies

The file declares the following compile-time dependencies:

Project

  • PasswordGenerator.hpp

C/C++ Runtime

  • random
  • stdexcept
  • vector
  • algorithm

4. Types and Public Contract

No standalone class, structure, or enumeration is declared directly in this file.

5. API and Method Inventory

The following functions or methods are implemented in this file:

  • PasswordGenerator::randomFrom(const std::string& charset) – Chooses one character from a supplied character set.

6. Functional Architecture

Generation Algorithm

  • Omits visually ambiguous characters such as uppercase I/O, lowercase l/o, and digits 0/1.
  • Adds one character from each enabled class before filling the remaining positions.
  • Automatically increases the requested length when it is smaller than the number of enabled classes.
  • Shuffles the final string so mandatory class characters do not remain in predictable positions.

Randomness

  • Uses thread-local std::random_device to seed std::mt19937.
  • Throws when no character class is enabled or when an empty character set reaches the internal selector.

7. Operational Flow

  1. Build the combined character set from enabled categories.
  2. Insert at least one character from every enabled category.
  3. Fill the remaining requested length from the combined set.
  4. Shuffle the completed password before returning it.

8. Filesystem and External Command Surface

No hard-coded absolute filesystem path is declared directly in this file.

Commands or Security Primitives Referenced

  • sh

9. Concurrency and Lifecycle

The file contains no explicit worker-thread or callback-lifetime mechanism.

10. Security Considerations

  • Password metadata and encrypted secrets are separated, reducing accidental exposure through the index file.
  • Cleartext passwords exist in process memory while the vault is unlocked and during import/export workflows.
  • CSV import and export files are unencrypted and must be handled as sensitive data.
  • Background callbacks must not outlive their owning GTK objects.
  • The implementation uses std::mt19937; a dedicated cryptographic random generator would provide a stronger password-generation primitive.

11. Implementation Considerations

  • The implementation should remain synchronized with the matching header declarations.

12. Licensing and Branding

The source is distributed under the GNU General Public License version 3.

The source header identifies BastionGuard™ as a trademark and states that the name and branding are not licensed under the GPL.

The software is provided without warranty, including implied warranties of merchantability or fitness for a particular purpose.

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