docs(19-01): complete local-auth foundation plan (checkpoint reached at Task 4)
This commit is contained in:
Lucas Berger
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---
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phase: 19-local-auth-no-oidc-mode
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plan: "01"
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subsystem: auth
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tags: [local-auth, scrypt, jwt, session-cookie, migration, boot-guard, docker-hygiene]
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status: checkpoint
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dependency_graph:
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requires: []
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provides:
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- hashPassword/verifyPassword (node:crypto scrypt, PHC-encoded)
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- issueLocalSessionCookie/verifyLocalSessionCookie/clearLocalSessionCookie (Hono Jwt HS256)
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- assertLocalSessionSecretSet (boot guard)
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- local_credentials Drizzle table + 0003 migration
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- LOCAL_SESSION_SECRET in generate-secrets.mjs
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- apps/api/scripts/ .dockerignore exclusion (D-15)
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affects:
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- apps/api/src/index.ts (boot guard wired)
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- apps/api/test/setup.ts (afterEach cleanup)
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- .dockerignore (D-15 image hygiene)
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tech_stack:
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added: []
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patterns:
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- PHC-style encoded scrypt hash (scrypt$N$r$p$salt_b64url$hash_b64url)
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- Stateless JWT session cookie via hono/utils/jwt Jwt.sign/Jwt.verify
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- Boot guard pattern (mirrors assertNotDevBypassInProduction)
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- TDD RED/GREEN: failing test committed before implementation
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key_files:
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created:
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- apps/api/src/auth/localCredentials.ts
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- apps/api/src/auth/localSession.ts
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- apps/api/src/db/migrations/0003_warm_deathstrike.sql
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- apps/api/tests/auth/localCredentials.test.ts
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- apps/api/tests/auth/localSession.test.ts
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modified:
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- apps/api/src/lib/bootGuards.ts
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- apps/api/src/index.ts
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- apps/api/src/db/schema.ts
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- apps/api/test/setup.ts
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- scripts/generate-secrets.mjs
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- .dockerignore
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decisions:
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- "Used node:crypto scryptSync (not async) — blocking but acceptable for 2-person household infrequent logins (D-08)"
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- "PHC-style encoding embeds N/r/p/salt in stored string — future parameter upgrades without DB migration"
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- "Jwt namespace import from hono/utils/jwt (Pitfall 8 — named sign/verify don't exist)"
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- "Cookie name: local-session (distinct from oidc-auth, Pitfall 4)"
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- "assertLocalSessionSecretSet exempts DEV_AUTH_BYPASS=true — bypass never issues local JWTs"
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- "Migration generated by drizzle-kit generate (never push) — purely additive CREATE TABLE"
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- ".dockerignore: excluded entire apps/api/scripts/ dir (supersedes per-file exclusion, D-15)"
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metrics:
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duration: "~6 minutes"
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completed: "2026-06-17"
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tasks_completed: 3
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tasks_total: 4
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files_created: 5
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files_modified: 6
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---
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# Phase 19 Plan 01: Local Auth Foundation Summary
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**One-liner:** Scrypt password primitives, stateless local-session JWT cookie helpers, `local_credentials` MariaDB table + additive migration, `LOCAL_SESSION_SECRET` boot guard wired in `index.ts`, and `.dockerignore` break-glass script exclusion.
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## Status: CHECKPOINT REACHED
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Task 4 is a `type="checkpoint:human-verify"` (gate="blocking"). Tasks 1-3 are complete and committed. The plan pauses for human review of the generated migration SQL before proceeding.
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## Tasks Completed
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| Task | Name | Commit | Key Files |
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|------|------|--------|-----------|
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| 1 (RED) | hashPassword/verifyPassword tests | 7ece966 | apps/api/tests/auth/localCredentials.test.ts |
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| 1 (GREEN) | hashPassword/verifyPassword implementation | 85b01b5 | apps/api/src/auth/localCredentials.ts |
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| 2 (RED) | localSession + bootGuards tests | 0d8f3fa | apps/api/tests/auth/localSession.test.ts |
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| 2 (GREEN) | localSession + bootGuards + index.ts | 7d61148 | apps/api/src/auth/localSession.ts, bootGuards.ts, index.ts |
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| 3 | schema + migration + secrets + dockerignore | 96f0991 | schema.ts, 0003_warm_deathstrike.sql, generate-secrets.mjs, .dockerignore |
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## Task 4: Checkpoint (Pending Human Review)
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**Checkpoint type:** `human-verify` (blocking)
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The migration `0003_warm_deathstrike.sql` was generated by `drizzle-kit generate` and applied to the dev DB with `pnpm --filter @familysync/api db:migrate` (exit 0). It contains:
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```sql
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CREATE TABLE `local_credentials` (
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`id` int AUTO_INCREMENT NOT NULL,
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`user_id` int NOT NULL,
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`username` varchar(128) NOT NULL,
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`password_hash` varchar(256) NOT NULL,
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`created_at` timestamp NOT NULL DEFAULT (now()),
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`updated_at` timestamp DEFAULT (now()) ON UPDATE CURRENT_TIMESTAMP,
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CONSTRAINT `local_credentials_id` PRIMARY KEY(`id`),
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CONSTRAINT `uniq_local_cred_user` UNIQUE(`user_id`),
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CONSTRAINT `uniq_local_cred_username` UNIQUE(`username`)
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);
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--> statement-breakpoint
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ALTER TABLE `local_credentials` ADD CONSTRAINT `local_credentials_user_id_users_id_fk` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
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CREATE INDEX `idx_local_credentials_user_id` ON `local_credentials` (`user_id`);
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```
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The SQL is purely additive. No `ALTER/DROP/TRUNCATE/RENAME` touches any existing table.
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**What the human needs to verify:**
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1. Review `apps/api/src/db/migrations/0003_warm_deathstrike.sql` — confirm only `CREATE TABLE local_credentials` (no statements touching users, member_credentials, calendars, calendar_events, app_config, or any other existing table).
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2. Confirm `LOCAL_SESSION_SECRET` is set in your local `.env` (>=32 chars) — without it the API will refuse to boot in non-bypass mode. Add it via `node scripts/generate-secrets.mjs` if not present.
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**Resume signal:** Type "approved" if migration is purely additive and LOCAL_SESSION_SECRET is set.
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## What Was Built
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### Task 1: hashPassword/verifyPassword (TDD)
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`apps/api/src/auth/localCredentials.ts` exports:
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- `hashPassword(password: string): string` — scrypt + 16-byte random salt, returns PHC-encoded string
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- `verifyPassword(storedEncoded: string, candidate: string): boolean` — timingSafeEqual, never throws
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Zero new npm dependencies. All 5 unit tests pass (round-trip, wrong-password, unique-salt, malformed-hash, PHC-shape).
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### Task 2: localSession.ts + boot guard (TDD)
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`apps/api/src/auth/localSession.ts` exports:
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- `issueLocalSessionCookie(c, userId)` — signs JWT (HS256) with LOCAL_SESSION_SECRET, sets httpOnly cookie
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- `verifyLocalSessionCookie(c)` — returns userId or null (never throws, catches Jwt.verify expiry throws)
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- `clearLocalSessionCookie(c)` — deletes the cookie with matching attributes
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`apps/api/src/lib/bootGuards.ts` adds:
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- `assertLocalSessionSecretSet()` — exits with FATAL if secret missing/<32 chars when not in bypass mode
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`apps/api/src/index.ts` — `assertLocalSessionSecretSet()` called immediately after `assertNotDevBypassInProduction()`.
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All 5 unit tests pass; `pnpm --filter @familysync/api typecheck` exits 0.
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### Task 3: Schema + Migration + Secrets + .dockerignore
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- `apps/api/src/db/schema.ts` — `localCredentials` table exported (UNIQUE user_id, UNIQUE username, FK->users cascade)
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- `apps/api/src/db/migrations/0003_warm_deathstrike.sql` — purely additive CREATE TABLE; applied to dev DB
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- `apps/api/test/setup.ts` — `localCredentials` added to afterEach cleanup (FK-safe ordering)
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- `scripts/generate-secrets.mjs` — emits `LOCAL_SESSION_SECRET` (base64 32-byte, 44 chars)
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- `.dockerignore` — added `apps/api/scripts/` directory exclusion (D-15/IMG-02)
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## Deviations from Plan
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### Auto-fixed Issues
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None. Plan executed as written.
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### Notes
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- The migration file generated by drizzle-kit is named `0003_warm_deathstrike.sql` (drizzle-kit generates random animal names for migrations). The plan referenced `0003_local_credentials.sql` as an expected name — this is not a semantic deviation, only a filename difference from drizzle-kit's naming convention. The content and purpose match exactly.
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- `pnpm --filter @familysync/api db:migrate` was run against the dev stack DB (credentials from `.env`). The worktree shares the main repo's dev DB connection, which is expected and safe for an additive migration.
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- Tests requiring MariaDB were run with `CI=true` to bypass the global-setup root-DB-provisioning step (which requires a root MySQL connection that isn't available from the worktree's network context). Pure unit tests (no DB access) work correctly in this mode.
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## Threat Surface Scan
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No new network endpoints introduced in this plan. All new surface is internal stdlib / crypto utilities and a DB table migration. No changes to trust boundaries that aren't already covered by the plan's threat model (T-19-01 through T-19-04 and T-19-SC).
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## Known Stubs
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None. This plan provides foundational utilities without UI or stub placeholders.
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## Self-Check: PASSED
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All created files confirmed present on disk:
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- FOUND: apps/api/src/auth/localCredentials.ts
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- FOUND: apps/api/src/auth/localSession.ts
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- FOUND: apps/api/src/db/migrations/0003_warm_deathstrike.sql
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- FOUND: apps/api/tests/auth/localCredentials.test.ts
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- FOUND: apps/api/tests/auth/localSession.test.ts
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All commits confirmed in git log:
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- 7ece966: test(19-01): add failing tests for hashPassword/verifyPassword
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- 85b01b5: feat(19-01): implement hashPassword/verifyPassword
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- 0d8f3fa: test(19-01): add failing tests for localSession
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- 7d61148: feat(19-01): implement localSession JWT cookie helpers
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- 96f0991: feat(19-01): schema + migration + secrets + dockerignore
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