eb6c689f0916a5fbd2fc1dfd005b2ce418e8bf29
3 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 Joseph Doherty
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3b09297b27 |
[M5] live-probe iteration 1 — major wire-byte reconciliation fixes
First live-test cycle against AVEVA on this box. Comparing the .NET
probe's `--dump-messages` XML output against our NBFX-encoded
envelope surfaced six structural bugs in the F25 envelope/operations
layer. All fixed; tests passing (702 workspace).
Fixes (all backed by the .NET dump as ground truth):
1. **`mustUnderstand` attribute name** — NBFS dict id was 116
(`MustUnderstand`, capital-M, a different SOAP token); SOAP 1.2
spec uses lowercase `mustUnderstand` at id 0. Sending the wrong
one triggered a WCF parse fault that surfaced as TCP RST.
2. **Missing `<a:MessageID>` header** — WCF's default binding
requires MessageID for two-way operations. We now auto-generate
`urn:uuid:<v4>` per envelope via a small inline `make_random_uuid_v4`
helper (no `uuid` crate dep).
3. **Missing `<a:ReplyTo>` anonymous header** — WCF's
BinaryMessageEncoder always emits `<a:ReplyTo><a:Address>...
addressing/anonymous</a:Address></a:ReplyTo>` for two-way ops.
4. **ConnectionValidator field names + namespace** — we were
emitting PascalCase `<ConnectionId>` etc. .NET's WCF
DataContractSerializer uses the private backing-field names
(`<connectionIdField xmlns="...ASBContract">guid</connectionIdField>`)
per `[DataMember(Name = "fooField")]`. Added the
`xmlns:i="...XMLSchema-instance"` declaration WCF emits
alongside (even when no `i:nil` is used). Decoder now accepts
both PascalCase (legacy tests) and DataContract field names.
5. **`<ASBIData>` over-wrapping** — we were emitting
`<Items><ASBIData>{bytes}</ASBIData></Items>`. .NET's
`AsbDataCustomSerializer.WriteStartObject` (`AsbContracts.cs:
1561-1572`) REPLACES the field's outer element with `<ASBIData>`
directly — there's no `<Items>` wrapper on the wire. Fixed by
collapsing `BodyField::AsbiDataElement` to emit just `<ASBIData>`
without the named outer element. The `name` field is retained
for self-documentation.
6. **`collect_asbidata_payloads` API** — was keyed by field name
(`Status` / `Values`); now positional (`payloads[0]`,
`payloads.get(1)`) since the wrapper element is gone. All seven
response decoders updated.
Plus tooling for the live-probe loop:
* `tools/Get-AsbPassphrase.ps1` — DPAPI loader that auto-discovers
the solution name + reads the sharedsecret + decrypts it. Sets
$env:MX_ASB_PASSPHRASE / MX_ASB_HOST / MX_ASB_VIA / MX_LIVE.
Lowercase via-host (WCF SMSvcHost is case-sensitive on the URL
host segment).
* `examples/asb-preamble-probe.rs` — diagnostic that connects,
runs the preamble, captures the PreambleAck, then sends a
synthetic ConnectRequest and dumps both directions as hex. Used
to bisect the wire-byte deltas above.
* `examples/asb-subscribe.rs` port default fixed (5074 → 808 —
WCF's NetTcpPortSharing/SMSvcHost listener confirmed via
Get-NetTCPConnection).
**Status**: preamble + PreambleAck round-trip works end-to-end
against the live AVEVA install (verified via probe). The
post-preamble Connect SOAP envelope still gets TCP RST'd — the six
structural fixes above are necessary but not yet sufficient. Next
iteration needs binary wire capture (Wireshark + Npcap loopback,
or a TCP-relay middleman) to compare the .NET probe's BinaryMessageEncoder
output byte-for-byte with ours and find the remaining delta(s).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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|
Joseph Doherty
|
25dbd8d3bd |
[M5] mxaccess-asb: F25 step 1 — SOAP envelope codec
First slice of F25. Provides the building blocks the per-operation
request/response codecs and the network loop will compose:
* `actions` module — IASBIDataV2 action strings (all 14 operations,
verbatim from `AsbContracts.cs:14-58`).
* `ConnectionValidator` — SOAP header struct mirroring
`AsbContracts.cs:65-117`. `from_signed(&SignedValidator)` converts
F23's MAC + IV to base64 for the wire, matching .NET's
`BinaryWriter`-via-`XmlSerializer` shape.
* `SoapEnvelope` + `encode_envelope` — assembles the NBFX token
stream: `s:Envelope` → `s:Header` → `a:Action s:mustUnderstand="1"`
→ optional `h:ConnectionValidator` → `s:Body` → caller-supplied
body tokens. Uses static-dictionary IDs for the SOAP/WS-Addressing
tokens via F22's `lookup_static`.
* `decode_envelope` — pulls action + validator + body tokens back
out of received bytes. Tolerant of header ordering.
* Mixed-endian GUID format/parse (`format_uuid` / `parse_uuid`) that
mirrors .NET's `Guid.ToString("D")` byte order so connection-id
round-trip matches the wire exactly.
9 new unit tests cover:
* Round-trip with and without validator.
* `from_signed` base64 encoding of MAC + IV.
* `format_uuid` produces the correct .NET-mixed-endian hex string.
* GUID round-trip through string formatter.
* Action string presence in the encoded byte stream.
* Decoder tolerance of envelopes without an Action header.
* Validator round-trip through full encode → decode.
* Lint-style guard that all 14 action constants are URIs ending `In`.
Stubbed for next F25 iteration: per-operation request/response
struct codecs (`ConnectRequest`, `RegisterItemsRequest`, etc.) +
`AsbClient` network loop.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Joseph Doherty
|
fe2a6db786 |
Initial project state: .NET reference, design, Rust port (M0+M1), evidence
rust / build / test / clippy / fmt (push) Has been cancelled
Layout:
- src/ .NET 10 x64 reference: MxNativeCodec, MxNativeClient,
MxAsbClient, probes, tests, harnesses. Executable spec.
- design/ Architectural plan for the Rust port (M0–M6), error
model, protocol invariants, risks (R1–R16), adversarial
review log (review.md).
- rust/ Rust workspace. M0 skeleton + M1 codec parity.
mxaccess-codec: 215 unit tests + 2 cross-implementation
parity tests (byte-identical against .NET reference).
Other crates are M0 stubs awaiting M2+.
- captures/ Frida + netsh + pcap evidence per CLAUDE.md
("captures are evidence, not throwaway logs").
- analysis/ Decompiled C# (frida/proxy/decompiled-*),
Ghidra exports for native DLLs (`exports/` only —
working state at `projects/` and AVEVA's input
binaries at `input/` are gitignored).
- docs/ Reverse-engineering reference docs.
- tools/ Setup-LiveProbeEnv.ps1 (Infisical credential fetcher),
Compute-Crc.ps1 (.NET parity helper).
- .github/workflows/ Rust CI: fmt + build + test + clippy on Windows.
- LICENSE MIT (Joseph Doherty, 2026).
Verified:
- cargo test --workspace → 217 passed (215 unit + 2 .NET parity), 0 failed
- cargo clippy --workspace -- -D warnings → clean
- cargo fmt --all -- --check → clean
- cargo publish --dry-run -p mxaccess-codec → packages cleanly
Excluded from history (see .gitignore):
- **/bin, **/obj, **/target — build artifacts
- analysis/ghidra/projects/ — Ghidra working state (regenerable)
- analysis/ghidra/input/ — AVEVA proprietary DLLs (vendor IP)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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