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236 lines
8.1 KiB
236 lines
8.1 KiB
// Every official fixture of testdata/ through the formats: the PRELUDE, the
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// sections and header_binding of each .dkc, its PUBLIC_HEADER and its
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// CONTROL_CBOR, decoded and written back to the same bytes, the profile and
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// the round time of its DateKey, P = rule(L), and in format 3 the frame of
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// BODY, the security area and the place of the head and of the files; and
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// each .dkk, whose capsule_digest is the SHA-256 of its .dkc. The values are
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// those of the records <name>.json and <name>.dkk.json, which Go wrote.
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@TestOn('vm')
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library;
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import 'dart:convert';
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import 'dart:io';
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import 'dart:typed_data';
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import 'package:datekeys/src/accesskey.dart';
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import 'package:datekeys/src/body.dart';
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import 'package:datekeys/src/bytes.dart';
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import 'package:datekeys/src/control.dart';
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import 'package:datekeys/src/datekey.dart';
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import 'package:datekeys/src/digest.dart';
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import 'package:datekeys/src/errors.dart';
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import 'package:datekeys/src/extension.dart';
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import 'package:datekeys/src/framing.dart';
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import 'package:datekeys/src/header.dart';
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import 'package:datekeys/src/padding.dart';
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import 'package:datekeys/src/profile.dart';
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import 'package:test/test.dart';
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typedef Json = Map<String, Object?>;
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Json readJson(String path) => jsonDecode(File(path).readAsStringSync()) as Json;
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Uint8List readBytes(String path) => File(path).readAsBytesSync();
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/// The extensions of a record, as `{critical, id, version, data}`.
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List<Object?> recordExtensions(Object? v) => [
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for (final e in ((v as List<Object?>?) ?? const []).cast<Json>())
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[e['critical'], e['id'], e['version'], e['data']],
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];
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List<Object?> extensionsOf(List<Extension> critical, List<Extension> non) => [
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for (final (c, list) in [(true, critical), (false, non)])
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for (final e in list)
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[c, e.id, e.version, e.data == null ? null : toHex(e.data!)],
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];
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String codeOf(void Function() body) {
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try {
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body();
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return 'ok';
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} on DateKeysException catch (e) {
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return e.code.code;
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}
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}
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void main() {
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final names =
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Directory('testdata/fixtures')
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.listSync()
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.map((f) => f.uri.pathSegments.last)
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.where((n) => n.endsWith('.dkc'))
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.map((n) => n.substring(0, n.length - 4))
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.toList()
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..sort();
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final keys =
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Directory('testdata/fixtures')
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.listSync()
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.map((f) => f.uri.pathSegments.last)
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.where((n) => n.endsWith('.dkk'))
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.toList()
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..sort();
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test('there are the 26 capsules and the 6 access keys of spec §67, §68', () {
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expect(names, hasLength(26));
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expect(keys, hasLength(6));
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});
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for (final name in names) {
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test(name, () {
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final r = readJson('testdata/fixtures/$name.json');
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final dkc = readBytes('testdata/fixtures/$name.dkc');
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expect(toHex(capsuleDigest(dkc)), r['sha256']);
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// The frame.
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final format = CapsuleFormat.fromVersion(r['format']! as int)!;
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final prelude = parsePrelude(dkc.sublist(0, dkcPreludeSize));
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expect(prelude.format, format);
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expect(toHex(preludeBytes(prelude)), r['prelude']);
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final s = splitCapsule(dkc);
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expect(s.prelude, prelude);
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expect(toHex(s.preludeBytes), r['prelude']);
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expect(toHex(s.publicHeader), r['public_header']);
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expect(s.sealedControl, hasLength(prelude.sealedControlLen));
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expect(s.payload.length, dkc.length - payloadOffset(prelude));
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expect(
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toHex(headerBinding(s.preludeBytes, s.publicHeader)),
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r['header_binding'],
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);
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// PUBLIC_HEADER, its profile and its round.
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final h = decodeHeader(s.publicHeader);
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expect(
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[h.capsuleIdHex, compactDateKey(h.dateKey), h.policy.label],
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[r['capsule_id'], r['datekey'], r['access_policy']],
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);
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expect(
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extensionsOf(h.critical, h.noncritical),
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recordExtensions(r['header_extensions']),
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);
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expect(toHex(encodeHeader(h)), r['public_header']);
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final p = defaultRegistry().lookup(h.dateKey.profileId)!;
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validateDateKey(h.dateKey, p);
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expect(formatRfc3339(unlockAt(h.dateKey, p)!), r['unlock_at']);
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// CONTROL_CBOR, in its format and in no other.
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final control = decodeControl(
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fromHex(r['control_cbor']! as String),
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format,
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);
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expect(
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[toHex(control.headerBinding), toHex(control.payloadIdentity)],
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[r['header_binding'], r['payload_identity']],
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);
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expect(
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extensionsOf(control.critical, control.noncritical),
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recordExtensions(r['control_extensions']),
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);
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expect(toHex(encodeControl(control, format)), r['control_cbor']);
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for (final other in CapsuleFormat.values.where((f) => f != format)) {
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expect(
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codeOf(
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() => decodeControl(fromHex(r['control_cbor']! as String), other),
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),
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'ERR_UNSUPPORTED_VERSION',
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);
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}
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final plaintext = readBytes('testdata/fixtures/${r['plaintext_file']}');
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if (!format.isPadded) {
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expect([control.payloadLength, control.padding], [null, null]);
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expect(r.containsKey('padding'), isFalse);
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expect(plaintext.length, r['payload_length']);
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return;
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}
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final l = control.payloadLength!;
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final rule = control.padding!;
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expect([l, rule.code], [r['payload_length'], r['padding']]);
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final padded = paddedLength(l, rule);
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expect(padded, r['padded_length']);
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expect(plaintext.length, l);
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// The plaintext of PAYLOAD_AGE is the content and zeros up to P.
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final check = PaddingCheck(l, padded);
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final content = BytesBuilder()
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..add(check.add(plaintext))
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..add(check.add(Uint8List(padded - l)));
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check.close();
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expect(content.takeBytes(), plaintext);
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if (format != CapsuleFormat.format3) return;
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// BODY: its frame, the security area, the head and the files.
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final frame = parseBodyFrame(plaintext.sublist(0, bodyFrameSize), l);
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expect(frame.areaLen, r['area_len']);
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final area = plaintext.sublist(
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bodyFrameSize,
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bodyFrameSize + frame.areaLen,
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);
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checkArea(area, frame.securityLen);
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expect(toHex(area.sublist(0, frame.securityLen)), r['security_cbor']);
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final headStart = bodyFrameSize + frame.areaLen;
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expect(
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toHex(plaintext.sublist(headStart, headStart + frame.headLen)),
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r['head_cbor'],
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);
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expect(headStart + frame.headLen, r['content_offset']);
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final files = (r['files'] as List<Object?>?) ?? const [];
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expect(
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contentLength(frame, l),
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[
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0,
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for (final f in files) (f! as Json)['size']! as int,
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].reduce((a, b) => a + b),
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);
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});
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}
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for (final key in keys) {
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test(key, () {
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final r = readJson('testdata/fixtures/$key.json');
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final raw = readBytes('testdata/fixtures/$key');
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expect(toHex(capsuleDigest(raw)), r['sha256']);
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final k = decodeAccessKey(raw);
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expect(
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[
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toHex(k.credentialId),
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toHex(k.capsuleId),
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k.type,
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toHex(k.material),
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k.verification == null ? null : toHex(k.verification!.capsuleDigest),
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],
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[
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r['credential_id'],
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r['capsule_id'],
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r['access_type'],
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r['access_material'],
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r['capsule_digest'],
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],
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);
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expect(
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extensionsOf(k.critical, k.noncritical),
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recordExtensions(r['extensions']),
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);
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checkAccessKeyMaterial(k);
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// capsule_digest is the SHA-256 of the exact bytes of its .dkc, and its
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// capsule_id that of the header of that capsule.
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final dkc = readBytes('testdata/fixtures/${r['capsule']}');
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checkCapsuleDigest(capsuleDigest(dkc), k.verification!.capsuleDigest);
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expect(
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decodeHeader(splitCapsule(dkc).publicHeader).capsuleId,
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k.capsuleId,
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);
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expect(
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codeOf(
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() => checkCapsuleDigest(
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capsuleDigest(raw),
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k.verification!.capsuleDigest,
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),
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),
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'ERR_ACCESS_INVALID',
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);
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expect(toHex(encodeAccessKey(k)), toHex(raw));
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k.wipe();
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expect(k.material.every((b) => b == 0), isTrue);
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});
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}
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}
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