bare-operating-system/packages/bare-os-seeder/kernel/bin/trustctl

/* BARE_OS_BIN_API 1.0.0 — bump when staged /bin script semantics change (see developer guide). */
/** Shared helpers for drive-resident /bin scripts (prepended before each command). */
function bareStdin(ctx) {
  return typeof ctx.shellStdin === 'string' ? ctx.shellStdin : ''
}

/** @param {number} mode @param {'file' | 'directory' | 'symlink'} type */
function bareFormatModeString(mode, type) {
  const typeChar = type === 'directory' ? 'd' : type === 'symlink' ? 'l' : '-'
  const perm = mode & 0o777
  const r = (bit) => (perm & bit ? 'r' : '-')
  const w = (bit) => (perm & bit ? 'w' : '-')
  const x = (bit) => (perm & bit ? 'x' : '-')
  return (
    typeChar +
    r(0o400) +
    w(0o200) +
    x(0o100) +
    r(0o040) +
    w(0o020) +
    x(0o010) +
    r(0o004) +
    w(0o002) +
    x(0o001)
  )
}

/** @param {number} mtimeMs @param {number} [nowMs] */
function bareFormatLsMtime(mtimeMs, nowMs) {
  const now = nowMs != null ? nowMs : Date.now()
  const d = new Date(mtimeMs)
  const months = [
    'Jan',
    'Feb',
    'Mar',
    'Apr',
    'May',
    'Jun',
    'Jul',
    'Aug',
    'Sep',
    'Oct',
    'Nov',
    'Dec'
  ]
  const mon = months[d.getMonth()]
  const day = String(d.getDate()).padStart(2, ' ')
  const sixMo = 180 * 24 * 3600 * 1000
  if (Math.abs(now - mtimeMs) > sixMo) {
    const yr = String(d.getFullYear()).padStart(4, ' ')
    return mon + ' ' + day + '  ' + yr
  }
  const hh = String(d.getHours()).padStart(2, '0')
  const mm = String(d.getMinutes()).padStart(2, '0')
  return mon + ' ' + day + ' ' + hh + ':' + mm
}

/** @param {number} size */
function barePosixBlocks(size) {
  return Math.ceil(Number(size) / 512) || 0
}

/**
 * Raw stdout for NUL/binary when **`process.stdout.write`** is missing.
 * If **`ctx.bareOsBinWrite(Uint8Array|string)`** is set (tests / host), use it.
 * @param {Record<string, unknown>} ctx
 * @param {string | Uint8Array} chunk
 * @returns {boolean}
 */
function bareOsEmitRaw(ctx, chunk) {
  if (typeof ctx.bareOsBinWrite === 'function') {
    const b4 = ctx.b4a
    const u8 =
      typeof chunk === 'string'
        ? b4 && typeof b4.from === 'function'
          ? b4.from(chunk)
          : new TextEncoder().encode(chunk)
        : chunk
    ctx.bareOsBinWrite(u8 instanceof Uint8Array ? u8 : new Uint8Array(u8))
    return true
  }
  const w = globalThis.process?.stdout?.write
  if (typeof w === 'function') {
    w.call(globalThis.process.stdout, chunk)
    return true
  }
  return false
}

function bareOsTrustPolicyPath() {
  return '/etc/bare-os/trust.policy.json'
}

async function bareOsTrustReadPolicy(ctx) {
  const doc = await bareP2pReadJson(ctx, bareOsTrustPolicyPath())
  if (!doc || typeof doc !== 'object') {
    return {
      schema: 1,
      signerPins: [],
      relayPolicy: { mode: 'consent-required' },
      encryptionPolicy: { mode: 'per-space-keys', rotationDays: 30 }
    }
  }
  if (!Array.isArray(doc.signerPins)) doc.signerPins = []
  return doc
}

async function run(ctx, argv) {
  const argv0 = argv[0] || 'trustctl'
  const parsed = bareP2pParseCommonFlags(argv.slice(1))
  const args = parsed.rest
  const opt = parsed.opt
  if (opt.help || args.length === 0) {
    ctx.console.log(
      bareP2pHelpText(
        argv0,
        'Inspect and edit trust roots, signer pins, and encryption policy.',
        argv0 + ' status | inspect TARGET | pin add KEY | pin rm KEY | policy show',
        ['status', 'pin add <signerKey> --yes', 'inspect pear://<key>'],
        ['appctl', 'peerctl']
      )
    )
    if (args.length === 0) ctx.exitCode = 1
    return
  }
  const sub = String(args[0] || '').trim()
  const policy = await bareOsTrustReadPolicy(ctx)
  if (sub === 'status' || (sub === 'policy' && String(args[1] || '') === 'show')) {
    bareP2pPrint(ctx, policy, opt)
    return
  }
  if (sub === 'inspect') {
    const target = String(args[1] || '').trim()
    if (!target) {
      bareP2pError(ctx, argv0, 'inspect requires TARGET', argv0 + ' inspect pear://<key>', opt)
      return
    }
    const out = {
      schema: 1,
      target,
      accepted: true,
      reasons: ['no deny rule matched', 'signer pin enforcement delegated to boot policy when enabled'],
      crossRefs: ['/proc/bare_os/pear_trust.json', '/proc/bare_os/security_posture.json']
    }
    bareP2pPrint(ctx, out, opt)
    return
  }
  if (sub === 'pin') {
    const action = String(args[1] || '').trim()
    const key = String(args[2] || '').trim()
    if ((action !== 'add' && action !== 'rm') || !key) {
      bareP2pError(ctx, argv0, 'pin requires add|rm KEY', argv0 + ' pin add <KEY>', opt)
      return
    }
    if (!opt.yes) {
      bareP2pError(ctx, argv0, 'confirmation required (pass --yes)', argv0 + ' pin ' + action + ' ' + key + ' --yes', opt)
      return
    }
    if (action === 'add' && !policy.signerPins.includes(key)) {
      policy.signerPins.push(key)
    }
    if (action === 'rm') {
      policy.signerPins = policy.signerPins.filter((x) => x !== key)
    }
    if (opt.dryRun) {
      bareP2pPrint(ctx, { ok: true, dryRun: true, signerPins: policy.signerPins }, opt)
      return
    }
    const ok = await bareP2pWriteJson(ctx, bareOsTrustPolicyPath(), policy)
    if (!ok) {
      bareP2pError(ctx, argv0, 'failed writing trust policy', 'check VFS write access', opt)
      return
    }
    bareP2pPrint(ctx, { ok: true, signerPins: policy.signerPins }, opt)
    return
  }
  const sug = bareP2pSuggestSubcommand(sub, ['status', 'inspect', 'pin', 'policy'])
  bareP2pError(
    ctx,
    argv0,
    'unsupported subcommand' + (sug ? ' (did you mean ' + sug + '?)' : ''),
    argv0 + ' --help',
    opt
  )
}