jwt_generator

Added

• HS256 support
  • HmacSignifier for signing JWTs with HMAC-SHA256.
  • HmacSignatureVerifier for verifying HS256 JWTs with a shared secret.
• ParsedJwt helper (generalized)
  • ParsedJwt.parse(String) moved to a generic location and exported; parses header/payload JSON and exposes signature + signingInput bytes.
• RS256 convenience
  • verifyJwtRs256(String jwt, RSAPublicKey publicKey) top-level helper that verifies an RS256 JWT with a PointyCastle public key (handles nullable modulus/exponent safely).

Changed

• RSA helpers hardened
  • Normalized Base64URL handling (padding tolerant) in verification paths.
  • Tidied error messages and kept them human-readable (JwtException, etc.).
• Examples
  • Example now shows an end-to-end RS256 flow (build + verify with public key) and an HS256 flow (shared secret).
• Project hygiene
  • Addressed analyzer lints across the new/updated files (including null-safe handling of RSAPublicKey.modulus/exponent).
  • Kept public API shape stable (no breaking changes).

Fixed

• Signature verification now correctly accepts tokens created with or without = padding (Base64URL normalization).
• Minor doc/code inconsistencies in exports (e.g., exposing parsed_jwt.dart and RS256 helpers).

Documentation

• README overhauled
  • Correct install commands (dart pub add jwt_generator, flutter pub add jwt_generator).
  • Clear guidance on RSA key generation and safe storage.
  • Complete RS256 and HS256 examples: generate → sign → verify.
• Clarified error types and typical failure modes in the docs.