parse method

@override void parse(Uint8List content)

Implementation

@override
void parse(Uint8List content) {
  _log.sdVerbose("Parsing EF.CardAccess" + content.hex());

  var parser = ASN1Parser(content);
  if (!parser.hasNext()) {
    _log.error("Invalid structure of EF.CardAccess. No data to parse.");
    throw EfParseError(
        "Invalid structure of EF.CardAccess. No data to parse.");
  }

  ASN1Set set = parser.nextObject() as ASN1Set;

  // there are 2 structures of EF.CardAccess but second one is not required
  // - PaceInfo
  // - PACEDomainParameterInfo

  if (set.elements == null || set.elements!.length < 1) {
    _log.error(
        "Invalid structure of EF.CardAccess. More than one element in set.");
    throw EfParseError(
        "Invalid structure of EF.CardAccess. More than one element in set.");
  }

  if (set.elements![0] is! ASN1Sequence) {
    _log.error(
        "Invalid structure of EF.CardAccess. First element in set is not ASN1Sequence.");
    throw EfParseError(
        "Invalid structure of EF.CardAccess. First element in set is not ASN1Sequence.");
  }

  PaceInfo pi = PaceInfo(content: set.elements![2] as ASN1Sequence);
  _log.info("PaceInfo parsed.");

  _log.sdDebug("PaceInfo: $pi");

  paceInfo = pi;

  _log.severe(
      "PaceInfo substruct has been saved to efcardaccess member ( paceInfo )");

  //TODO: parse PACEDomainParameterInfo(9303 p11, 9.2.1)
  /*
    PACEDomainParameterInfo ::= SEQUENCE {
      protocol OBJECT IDENTIFIER(
      id-PACE-DH-GM |
      id-PACE-ECDH-GM |
      id-PACE-DH-IM |
      id-PACE-ECDH-IM |
      id-PACE-ECDH-CAM),
      domainParameter AlgorithmIdentifier,
      parameterId INTEGER OPTIONAL
    }
   */

  /*String paceOID = "id-PACE-ECDH-GM-AES-CBC-CMAC-128"; //0.4.0.127.0.7.2.2.4.2.2
  int parameterSpec = 2;
  PaceMappingType paceMappingType = PaceMappingType.GM;
  String aggrementAlgorithm = "ECDH";
  String cipherAlgorithm = "AES";
  String digestAlgorithm = "SHA-1";
  int keyLength = 128;
  String mrzKey = "PB1777140590020743305304";

  //List<int> buf = utf8.encode(mrzKey);
  Uint8List buf = Uint8List.fromList(utf8.encode(mrzKey));
  Digest sha1 = Digest("SHA-1");
  List<int> sha1Bytes = sha1.process(buf);
  String sha1Hex = sha1Bytes.map((byte) => byte.toRadixString(16).padLeft(2, '0')).join();

  var smskg = SecureMessagingSessionKeyGenerator();
  var key = await smskg.deriveKey(keySeed: hash, cipherAlgName: cipherAlg, keyLength: keyLength, nonce: null, mode: SecureMessagingSessionKeyDerivationMode.PACE_MODE, paceKeyReference: paceKeyType);
  return key;*/
}