dalbodeule bc961567e2 [feat](server): enhance DTLS handshake with DNS/IP-based domain validation ...

- Added `canonicalizeDomainForDNS` to normalize domain strings for DNS and DB lookups.
- Implemented `domainGateValidator` to verify if client-provided domains resolve to expected IPs (`HOP_ACME_EXPECT_IPS`) using A/AAAA DNS queries.
- Included a fallback for DB-only validation if `HOP_ACME_EXPECT_IPS` is unset or empty.
- Updated `parseExpectedIPsFromEnv` to parse and validate IP lists from environment variables.
- Marked relevant handshake enhancements in `progress.md` as completed.

2025-12-03 00:13:30 +09:00

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main.go

[feat](server): enhance DTLS handshake with DNS/IP-based domain validation

2025-12-03 00:13:30 +09:00