Lands M2 wave 1 — three pure-Rust modules under crates/mxaccess-rpc with
60 unit tests. Each is a 1:1 port of one .NET reference file:
- ntlm.rs (1137 LoC, 19 tests) — `ManagedNtlmClientContext.cs`. NTLMv2
challenge/response, Type1/Type3 builders, sign() with RC4-sealed checksum
and per-call sequence advance. Manual `Debug` impl that hides credentials;
not Clone (rc4 0.2 cipher state is non-Clone). Pure-Rust crypto via
hmac/md-5/md4/rc4 v0.2/rand v0.8 (rc4 0.2 chosen per design/review.md:78).
- pdu.rs (1573 LoC, 33 tests) — `DceRpcPdu.cs` + auth-trailer types from
`DceRpcAuthentication.cs`. Bind/AlterContext/Auth3/Request/Response/Fault
PDUs, NDR20 transfer syntax, auth_value with 4-byte alignment padding,
preserved-byte fields per CLAUDE.md unknown-bytes rule.
- objref.rs (~470 LoC, 11 tests including a 366-byte captured OBJREF
round-trip) — `ComObjRef.cs`. MEOW signature, OXID/OID/IPID, dual-string
array with printable-ASCII escaping and security-binding boundary.
ComObjRefProvider.cs deferred (windows-rs Win32 wrapper — see F6).
Every wire-byte claim cites src/MxNativeClient/<file>.cs:LINE per
CLAUDE.md "no fabricated protocol behaviour" rule.
Test count delta: 217 → 277 (+60)
Open followups touched: F1–F8 (new — see design/followups.md)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Joseph Doherty
95bd218183