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Use plain Mermaid diagrams again and drop the SVG images

Browse Source 
The preview problems were caused by the diagram text, which is now fixed in
every copy, so the pre-rendered SVGs (white background, harder to keep in
sync) are no longer needed. Also updates docker/docs with the fixed text.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Ryan
2026-10-25 11:31:29 +03:30
co-authored by Claude Sonnet 5.5
parent c1fcfb7b73
commit 20d69b93b7
10 changed files with 30 additions and 65 deletions
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docker/docs/sn-as-username-process.md
+15 -15
View File
@@ -118,14 +118,14 @@ sequenceDiagram
participant G as Go backend
B->>B: random Client ID, X25519 pair (b, B), nonce n1
B->>M: CONNECT anonymous, clientId=random (TLS)
B->>M: SUBSCRIBE enroll/response/<cid> (own topic only)
B->>G: enroll/request/<cid> {B, n1, mac}
G->>G: reserve <cid>, assign FN, ephemeral (s, S)
G->>G: shared = X25519(s, B); pw = HKDF(shared, salt=n1, info=label|FN)
B->>M: SUBSCRIBE enroll/response/[cid] (own topic only)
B->>G: enroll/request/[cid] [B, n1, mac]
G->>G: reserve [cid], assign FN, ephemeral (s, S)
G->>G: shared = X25519(s, B), pw = HKDF(shared, salt=n1, info = label, FN)
G->>M: dynsec createClient FN, pw, clientid=FN, role board-bootstrap
G->>B: enroll/response/<cid> {FN, S, sig} (not retained)
B->>B: verify sig; shared = X25519(b, S); same pw
B->>B: persist FN + pw to flash, then reconnect as FN
G->>B: enroll/response/[cid] [FN, S, sig] (not retained)
B->>B: verify sig, shared = X25519(b, S), same pw
B->>B: persist FN and pw to flash, then reconnect as FN
```
- `sig` = Ed25519 over `S || B || n1 || clientid || FN`. Binding the FN and the Client ID means a reply for another request, board or identity does not verify.
@@ -161,18 +161,18 @@ sequenceDiagram
participant G as Go backend
participant M as Mosquitto
participant B as Board (FN session)
B->>B: fresh X25519 pair (b2, B2), nonce n2, SAS = digits(hash(B2 || n2 || FN))
B->>G: board/<FN>/activation/request {B2, n2}
B->>B: fresh X25519 pair (b2, B2), nonce n2, SAS = digits(hash(B2, n2, FN))
B->>G: board/[FN]/activation/request [B2, n2]
G->>O: pending request FN, MAC label, SAS, time
O->>G: choose SN, enter activation code, confirm SAS matches the board
G->>G: DB: ACTIVATING (FN, SN, generation g+1), unique constraint
G->>G: ephemeral (s2, S2); shared2; pw_sn = HKDF(shared2, salt=n2, info=label|SN|g+1)
G->>G: DB: ACTIVATING (FN, SN, next generation), unique constraint
G->>G: ephemeral (s2, S2), shared2, pw_sn = HKDF(shared2, salt=n2, info = label, SN, generation)
G->>M: dynsec create or update client SN: pw_sn, role vending-device, clientid = FN
G->>B: board/<FN>/activation/response {SN, g+1, S2, sig}
B->>B: verify sig, derive pw_sn, persist SN + pw_sn + generation, reconnect
G->>B: board/[FN]/activation/response [SN, next generation, S2, sig]
B->>B: verify sig, derive pw_sn, persist SN, pw_sn and generation, reconnect
B->>M: CONNECT username=SN, clientId=FN, password=pw_sn
M-->>G: first message on device/<SN>/... (or presence)
G->>G: DB: ACTIVE; disable the FN client; audit
M-->>G: first message on device/[SN]/... (or presence)
G->>G: DB: ACTIVE, disable the FN client, audit
```
### 9.3 Rules that make it safe