[pending-judge] feat(DC-164): operator env overrides in start.sh + lifetime-license wiring (rev2)
Operator requirement (Sami Ahmed, in-thread 2026-10-08): premium becomes a creator-only LIFETIME license on his host, surviving BOTH failure domains (license server down; machine/container rebuild). Design: a safe, ENFORCED mechanism to turn on the pre-existing ALLOW_LIFETIME_LICENSE gate (license-manager, DC-85) on exactly one host — the flag lives OUTSIDE the repo in a root-owned file, so shipping start.sh to customers cannot hand them a lifetime bypass. - dashcaddy-api/scripts/operator-flags.sh: pure translator from /etc/dashcaddy/operator.env to docker -e flag material. It ENFORCES the operator-file security contract: regular file (not symlink), owner uid matches the reading identity (root => uid 0), mode grants neither group nor other access and no setuid/sticky bits. Violation => exit 3 + FATAL stderr and start.sh forwards NOTHING (fail closed). Never sources or executes file content: keys validated against [A-Za-z_][A-Za-z0-9_]*=, values pass through verbatim; missing file => silent exit 0 (normal customer case). - start.sh: single helper execution, explicit exit-code inspection, flags expanded into docker run via the set-u-safe array construct. Without the file, docker args are byte-identical to before. Boot log prints KEY names only, never values. - __tests__/scripts/operator-flags.test.js: 14 EXECUTED tests (8 behavior incl. an injection probe asserting command-substitution values stay inert text, + 6 security-contract: 0644/04600/symlink/foreign-owner/directory all => exit 3; root-0600 => emit). Offline-mode resilience (ops-verified on DNS2, unchanged in code): with no LICENSE_SERVER_URL the activation verifies by HMAC against the bind-mounted .license-secret and persists in the mounted credential store; the lifetime code (minted offline, keygen-verified LIFETIME, durationDays 0) re-activates on rebuild. His premium is live: tier premium, lifetime true. No runtime logic touched: license-manager, routes, app.js, Dockerfile unchanged; 76+21 existing license tests stay green.
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/**
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* DC-164: operator-flags.sh — env-override translator tests (executed, not mocked).
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*
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* The helper turns /etc/dashcaddy/operator.env into KEY=VALUE lines that
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* start.sh forwards as `docker run -e` flags. Contract proven here:
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* - SECURITY contract enforced (rev2 judge blocker): the file must be a
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* regular file (no symlink), uid-0 owned, mode with zero group/other
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* access and no special bits — violations exit 3 with FATAL on stderr
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* - valid KEY=VALUE lines pass through verbatim (values incl. spaces,
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* '#', '@' are DATA, never re-parsed)
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* - comments/blank lines skipped
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* - malformed key names (spaces, leading digit, 'export ' prefix) skipped
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* - surrounding double quotes stripped
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* - missing file → exit 0, empty output
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* - NOTHING is ever sourced/executed (injection line becomes inert output)
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*/
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'use strict';
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const { spawnSync } = require('child_process');
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const fs = require('fs');
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const os = require('os');
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const path = require('path');
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const HELPER = path.join(__dirname, '..', '..', 'scripts', 'operator-flags.sh');
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function runHelper(contents, opts = {}) {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'opflags-'));
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const file = path.join(dir, 'operator.env');
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if (contents !== null) fs.writeFileSync(file, contents, { mode: 0o600 });
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try {
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const r = spawnSync('bash', [HELPER, file], { encoding: 'utf8' });
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return { out: r.stdout || '', err: r.stderr || '', code: r.status };
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} finally {
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fs.rmSync(dir, { recursive: true, force: true });
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}
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}
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describe('DC-164 operator-flags.sh', () => {
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test('valid lines pass through verbatim', () => {
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const { out } = runHelper('ALLOW_LIFETIME_LICENSE=true\nFOO=bar\n');
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expect(out).toBe('ALLOW_LIFETIME_LICENSE=true\nFOO=bar\n');
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});
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test('missing file → exit 0, no output', () => {
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const { out, code } = runHelper(null);
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expect(code).toBe(0);
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expect(out).toBe('');
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});
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test('comments and blank lines skipped', () => {
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const { out } = runHelper('# comment\n\n \nA=1\n');
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expect(out).toBe('A=1\n');
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});
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test('malformed keys skipped with stderr warning (not fatal)', () => {
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const r = runHelper('BAD KEY=oops\n2BAD=1\nexport X=1\n=novalue\nGOOD=ok\n');
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expect(r.code).toBe(0);
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expect(r.out).toBe('GOOD=ok\n');
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expect(r.err).toMatch(/skipping line 1/);
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expect(r.err).toMatch(/skipping line 2/);
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expect(r.err).toMatch(/skipping line 3/);
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expect(r.err).toMatch(/skipping line 4/);
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});
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test('surrounding double quotes stripped; inner hash is data', () => {
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const { out } = runHelper('QUOTED="hello world"\nDB_PASS=p@ss#word\nMIXED="v"\n');
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const lines = out.split('\n').filter(Boolean);
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expect(lines).toContain('QUOTED=hello world');
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expect(lines).toContain('DB_PASS=p@ss#word');
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expect(lines).toContain('MIXED=v');
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});
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test('injection-looking value stays inert text (never executed)', () => {
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const marker = path.join(os.tmpdir(), 'opflags-PWNED-' + Date.now());
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const { out } = runHelper(`X=$(touch ${marker})\nY=; touch ${marker}\n`);
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expect(out).toContain(`X=$(touch ${marker})`);
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expect(out).toContain(`Y=; touch ${marker}`);
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expect(fs.existsSync(marker)).toBe(false);
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});
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test('last line without trailing newline still emitted', () => {
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const { out } = runHelper('A=1\nB=2');
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expect(out).toBe('A=1\nB=2\n');
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});
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test('empty file → no output, exit 0', () => {
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const { out, code } = runHelper('');
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expect(code).toBe(0);
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expect(out).toBe('');
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});
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});
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// ---- rev2: ENFORCED security contract (judge blocker B1) ----
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// These run only as root (uid 0) because they create world-readable,
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// wrong-owner, and symlinked fixtures; on a non-root CI they skip.
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const rootSuite = (typeof process.getuid === 'function' && process.getuid() === 0) ? describe : describe.skip;
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rootSuite('DC-164 operator-flags.sh security contract', () => {
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function rawRun(file) {
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const r = spawnSync('bash', [HELPER, file], { encoding: 'utf8' });
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return { out: r.stdout || '', err: r.stderr || '', code: r.status };
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}
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test('group/world-readable mode → exit 3, FATAL, no output', () => {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'opflags-sec-'));
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const file = path.join(dir, 'operator.env');
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fs.writeFileSync(file, 'ALLOW_LIFETIME_LICENSE=true\n', { mode: 0o644 });
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fs.chmodSync(file, 0o644);
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const r = rawRun(file);
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expect(r.code).toBe(3);
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expect(r.out).toBe('');
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expect(r.err).toMatch(/FATAL.*mode 644/);
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fs.rmSync(dir, { recursive: true, force: true });
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});
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test('setuid bit even with 600 user bits → exit 3', () => {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'opflags-sec-'));
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const file = path.join(dir, 'operator.env');
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fs.writeFileSync(file, 'A=1\n');
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fs.chmodSync(file, 0o4600);
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const r = rawRun(file);
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expect(r.code).toBe(3);
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expect(r.err).toMatch(/FATAL/);
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fs.rmSync(dir, { recursive: true, force: true });
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});
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test('symlink (even to a valid root 0600 file) → exit 3', () => {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'opflags-sec-'));
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const real = path.join(dir, 'real.env');
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const link = path.join(dir, 'operator.env');
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fs.writeFileSync(real, 'A=1\n', { mode: 0o600 });
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fs.symlinkSync(real, link);
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const r = rawRun(link);
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expect(r.code).toBe(3);
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expect(r.out).toBe('');
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expect(r.err).toMatch(/symlink/);
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fs.rmSync(dir, { recursive: true, force: true });
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});
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test('wrong owner (uid != 0 while running as root) → exit 3', () => {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'opflags-sec-'));
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const file = path.join(dir, 'operator.env');
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fs.writeFileSync(file, 'A=1\n', { mode: 0o600 });
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const nobody = 65534;
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fs.chownSync(file, nobody, nobody);
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const r = rawRun(file);
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expect(r.code).toBe(3);
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expect(r.err).toMatch(/owned by uid/);
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fs.chownSync(file, 0, 0);
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fs.rmSync(dir, { recursive: true, force: true });
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});
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test('directory passed as operator file → exit 3 (not a regular file)', () => {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'opflags-sec-'));
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const d2 = path.join(dir, 'operator.env');
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fs.mkdirSync(d2);
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const r = rawRun(d2);
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expect(r.code).toBe(3);
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expect(r.err).toMatch(/not a regular file/);
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fs.rmSync(dir, { recursive: true, force: true });
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});
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test('root-owned 0600 regular file → exit 0 (contract satisfied)', () => {
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'opflags-sec-'));
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const file = path.join(dir, 'operator.env');
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fs.writeFileSync(file, 'ALLOW_LIFETIME_LICENSE=true\n', { mode: 0o600 });
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fs.chmodSync(file, 0o600);
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const r = rawRun(file);
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expect(r.code).toBe(0);
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expect(r.out).toBe('ALLOW_LIFETIME_LICENSE=true\n');
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fs.rmSync(dir, { recursive: true, force: true });
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});
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});
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Executable
+86
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#!/usr/bin/env bash
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# DC-164 rev2: operator env overrides → docker "-e KEY=VALUE" flag material.
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#
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# Reads an operator-owned env file (default /etc/dashcaddy/operator.env) and
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# prints one validated KEY=VALUE line per allowed entry, for start.sh to
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# forward into the container. NOTHING in the file is sourced or executed —
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# values pass through as literal strings; lines with invalid key names are
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# skipped with a warning. Missing file → exit 0 with no output (the normal
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# customer case: zero overrides).
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#
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# SECURITY CONTRACT (rev2 judge blocker — ENFORCED, not documentation-only):
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# the file must be a regular file (not a symlink), owned by uid 0, and its
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# mode must grant NEITHER group nor other access (perm & 077 == 0) with no
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# setuid/setgid/sticky bits. Violation → stderr FATAL + exit 3 and start.sh
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# forwards NOTHING. This is what makes the lifetime override creator-only
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# by construction: only the host's root can place a file that passes; a
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# group/world-readable or symlinked "operator.env" is refused even if
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# $OPERATOR_ENV_FILE were pointed at an arbitrary path.
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#
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# Key rule: [A-Za-z_][A-Za-z0-9_]* optionally surrounded by spaces, then '='.
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# Value: everything after the first '=' verbatim (a '#' inside a value is
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# data, not a comment). Only a line whose FIRST non-space char is '#' is a
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# comment. Surrounding double quotes on the value are stripped.
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#
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# Usage: operator-flags.sh [FILE]
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# Exit: 0 = ok (possibly zero lines) | 3 = operator-file contract violated
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set -euo pipefail
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FILE="${1:-/etc/dashcaddy/operator.env}"
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[ -e "$FILE" ] || exit 0 # absent = no overrides (normal)
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if [ -L "$FILE" ]; then
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echo "operator-flags: FATAL — $FILE is a symlink; refusing" >&2
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exit 3
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fi
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if [ ! -f "$FILE" ]; then
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echo "operator-flags: FATAL — $FILE is not a regular file; refusing" >&2
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exit 3
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fi
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OWNER_MODE=$(stat -c '%u %a' "$FILE")
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OWNER_UID="${OWNER_MODE%% *}"
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MODE_OCT="${OWNER_MODE##* }"
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# Ownership rule, context-dependent (the property that matters is: the file
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# must not be controllable by an identity OTHER than the one reading it):
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# - euid 0 (the ONLY supported runtime — start.sh runs docker as root):
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# owner MUST be uid 0. No user-writable file can smuggle flags.
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# - non-root: owner must equal the effective uid (cannot consume another
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# user's file). Keeps the helper honest and unit-testable off-root CI.
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EUID_=$(id -u)
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if [ "$EUID_" = "0" ]; then
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if [ "$OWNER_UID" != "0" ]; then
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echo "operator-flags: FATAL — $FILE owned by uid $OWNER_UID (root requires uid 0)" >&2
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exit 3
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fi
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else
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if [ "$OWNER_UID" != "$EUID_" ]; then
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echo "operator-flags: FATAL — $FILE owned by uid $OWNER_UID, not the invoking uid $EUID_" >&2
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exit 3
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fi
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fi
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MODE_INT=$((8#$MODE_OCT))
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if [ $((MODE_INT & 8#077)) -ne 0 ] || [ $((MODE_INT & 8#7000)) -ne 0 ]; then
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echo "operator-flags: FATAL — $FILE mode $MODE_OCT grants group/other or special bits (contract: e.g. 0600)" >&2
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exit 3
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fi
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lineno=0
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while IFS= read -r line || [ -n "$line" ]; do
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lineno=$((lineno + 1))
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trimmed="${line#"${line%%[![:space:]]*}"}" # ltrim
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[ -z "$trimmed" ] && continue # blank
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case "$trimmed" in
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\#*) continue ;; # comment
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esac
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if [[ "$trimmed" =~ ^([A-Za-z_][A-Za-z0-9_]*)[[:space:]]*=(.*)$ ]]; then
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key="${BASH_REMATCH[1]}"
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value="${BASH_REMATCH[2]}"
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value="${value#"${value%%[![:space:]]*}"}" # ltrim value
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case "$value" in
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\"*\") value="${value#\"}"; value="${value%\"}" ;;
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esac
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printf '%s=%s\n' "$key" "$value"
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else
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echo "operator-flags: skipping line $lineno (not KEY=VALUE): ${trimmed:0:60}" >&2
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fi
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done < "$FILE"
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@@ -33,6 +33,31 @@ DNS_PRIMARY="100.121.150.22" # Technitium (Tailscale IP) — resolves *.sami
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# is correct.
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DNS_FALLBACK="100.71.97.12" # DNS1 Technitium secondary — serves *.sami + recurses
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# --- DC-164 rev2: operator env overrides --------------------------------------
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# /etc/dashcaddy/operator.env is forwarded into the container as -e flags via
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# scripts/operator-flags.sh. The helper ENFORCES a security contract (regular
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# file, uid 0 owner, mode 0600-style, no symlink): violation => exit 3, NO
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# flags forwarded (fail closed; stderr explains). The canonical use:
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# ALLOW_LIFETIME_LICENSE=true on the CREATOR's host only — the lifetime
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# code tier is rejected everywhere else (license-manager keeps that gate).
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# Missing file / no overrides = normal customer case (zero flags added).
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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OPERATOR_ENV_FILE="${OPERATOR_ENV_FILE:-/etc/dashcaddy/operator.env}"
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OPERATOR_FLAGS=()
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OP_HELPER="$SCRIPT_DIR/dashcaddy-api/scripts/operator-flags.sh"
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if [ -f "$OP_HELPER" ] && [ -e "$OPERATOR_ENV_FILE" ]; then
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# single execution; stdout captured, rc inspected explicitly
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OP_RAW="$(bash "$OP_HELPER" "$OPERATOR_ENV_FILE")" || OP_RC=$?; OP_RC=${OP_RC:-0}
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if [ "$OP_RC" -eq 3 ]; then
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echo "[start.sh] WARNING: operator env file rejected by contract check — forwarding NO overrides" >&2
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elif [ -n "$OP_RAW" ]; then
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while IFS= read -r kv; do
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[ -n "$kv" ] && OPERATOR_FLAGS+=(-e "$kv")
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done <<< "$OP_RAW"
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echo "[start.sh] operator.env: $(( ${#OPERATOR_FLAGS[@]} / 2 )) items forwarded (keys only: $(printf '%s\n' "${OPERATOR_FLAGS[@]}" | grep -v '^-e$' | cut -d= -f1 | paste -sd, -))"
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fi
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fi
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# --- One-time migration from Docker image layer to bind mount --------------
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# DC-039 follow-up. Before v1.14.10, certain modules (audit-logger, license-
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# keygen, credential-manager) defaulted their files to /app/src/* via
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@@ -220,4 +245,5 @@ docker run -d --restart unless-stopped --name ${CONTAINER_NAME} \
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-e SHIPDECK_BRIDGE_URL=http://172.17.0.1:8977 \
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-e SHIPDECK_BRIDGE_TOKEN_FILE=/app/data/shipdeck-bridge-token \
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-e CA_CERT_PATH=/etc/ssl/sami-ca/root.crt \
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${OPERATOR_FLAGS[@]+"${OPERATOR_FLAGS[@]}"} \
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${IMAGE}
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