password_engine 1.0.0

A comprehensive and extensible password generation library for Dart and Flutter

Changelog

1.0.0

• Initial release of password_engine.
• Core Features:
  • Flexible password generation with configurable character sets (uppercase, lowercase, numbers, special characters) and length (default to 16 characters).
  • Advanced architecture built around the Strategy pattern, allowing injection of custom generation algorithms.
  • Fluent PasswordGeneratorConfigBuilder for strict, safe, and immutable configuration management.
• Security & Validation:
  • Built-in PasswordStrengthEstimator using pool-based entropy estimation (L × log₂(N)) to evaluate password strength.
  • Pluggable IPasswordNormalizer interface with a passthrough default — inject a custom normalizer for Unicode normalization or whitespace handling.
  • PasswordValidator and ConfigAwarePasswordValidator to enforce rigorous rules (e.g., minimum 16 characters, 4 disjoint types).
  • Advanced PolicyAwarePasswordStrategy ensuring the outcome explicitly respects numeric thresholds (e.g., "at least 2 letters, 3 symbols").
• Interactive Feedback:
  • estimateFeedback() method coupled with PasswordFeedbackContext for UI-layer password meters and suggestions.
• Configuration:
  • Comprehensive PasswordGeneratorConfig and CharacterSetProfile.
  • Configurable exclusion of ambiguous characters.