1 Commits

Author	SHA1	Message	Date
Chris Chen	85bf329d93	Add Line webhook signature verification helper ... Implements LineSignature.IsValid() using HMAC-SHA256 + FixedTimeEquals to prevent timing attacks; includes xUnit tests for valid, tampered, and null/empty header cases. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>	2026-06-23 19:07:01 -07:00