Python Data.getName方法代码示例

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import getName [as 别名]
    def _registerPrefixHelper(
      self, registeredPrefixId, prefix, onInterest, onRegisterFailed, flags,
      wireFormat):
        """
        Do the work of registerPrefix to register with NDNx once we have an
        _ndndId.

        :param int registeredPrefixId: The
          _RegisteredPrefix.getNextRegisteredPrefixId() which registerPrefix got
          so it could return it to the caller. If this is 0, then don't add to
          _registeredPrefixTable (assuming it has already been done).
        """
        # Create a ForwardingEntry.
        # Note: ndnd ignores any freshness that is larger than 3600 seconds and
        #   sets 300 seconds instead. To register "forever", (=2000000000 sec),
        #   the freshness period must be omitted.
        forwardingEntry = ForwardingEntry()
        forwardingEntry.setAction("selfreg")
        forwardingEntry.setPrefix(prefix)
        forwardingEntry.setForwardingFlags(flags)
        content = forwardingEntry.wireEncode(wireFormat)

        # Set the ForwardingEntry as the content of a Data packet and sign.
        data = Data()
        data.setContent(content)
        # Set the name to a random value so that each request is unique.
        nonce = bytearray(4)
        for i in range(len(nonce)):
            nonce[i] = _systemRandom.randint(0, 0xff)
        data.getName().append(nonce)
        # The ndnd ignores the signature, so set to blank values.
        data.getSignature().getKeyLocator().setType(
          KeyLocatorType.KEY_LOCATOR_DIGEST)
        data.getSignature().getKeyLocator().setKeyData(
          Blob(bytearray(32), False))
        data.getSignature().setSignature(Blob(bytearray(128), False))
        encodedData = data.wireEncode(wireFormat)

        # Create an interest where the name has the encoded Data packet.
        interestName = Name().append("ndnx").append(self._ndndId).append(
          "selfreg").append(encodedData)

        interest = Interest(interestName)
        interest.setInterestLifetimeMilliseconds(4000.0)
        interest.setScope(1)
        encodedInterest = interest.wireEncode(wireFormat)

        if registeredPrefixId != 0:
            # Save the onInterest callback and send the registration interest.
            self._registeredPrefixTable.append(Node._RegisteredPrefix(
              registeredPrefixId, prefix, onInterest))

        response = Node._RegisterResponse(
          self, prefix, onInterest, onRegisterFailed, flags, wireFormat, False)
        self.expressInterest(
          interest, response.onData, response.onTimeout, wireFormat)

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import getName [as 别名]
    def _broadcastSyncState(self, digest, syncMessage):
        """
        Make a data packet with the syncMessage and with name
        applicationBroadcastPrefix_ + digest. Sign and send.

        :param str digest: The root digest as a hex string for the data packet
          name.
        :param sync_state_pb2.SyncState syncMessage:
        """
        data = Data(self._applicationBroadcastPrefix)
        data.getName().append(digest)
        # TODO: Check if this works in Python 3.
        data.setContent(Blob(syncMessage.SerializeToString()))
        self._keyChain.sign(data, self._certificateName)
        self._contentCache.add(data)

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import getName [as 别名]
    def onReceivedElement(self, element):
        """
        This is called by the transport's ElementReader to process an
        entire received Data or Interest element.

        :param element: The bytes of the incoming element.
        :type element: An array type with int elements
        """
        # First, decode as Interest or Data.
        interest = None
        data = None
        decoder = TlvDecoder(element)
        if decoder.peekType(Tlv.Interest, len(element)):
            interest = Interest()
            interest.wireDecode(element, TlvWireFormat.get())
        elif decoder.peekType(Tlv.Data, len(element)):
            data = Data()
            data.wireDecode(element, TlvWireFormat.get())

        # Now process as Interest or Data.
        if interest != None:
            # Call all interest filter callbacks which match.
            for i in range(len(self._interestFilterTable)):
                entry = self._interestFilterTable[i]
                if entry.getFilter().doesMatch(interest.getName()):
                    includeFilter = True
                    # Use getcallargs to test if onInterest accepts 5 args.
                    try:
                        inspect.getcallargs(entry.getOnInterest(),
                          None, None, None, None, None)
                    except TypeError:
                        # Assume onInterest is old-style with 4 arguments.
                        includeFilter = False

                    if includeFilter:
                        try:
                            entry.getOnInterest()(
                              entry.getFilter().getPrefix(), interest,
                              entry.getFace(), entry.getInterestFilterId(),
                              entry.getFilter())
                        except:
                            logging.exception("Error in onInterest")
                    else:
                        # Old-style onInterest without the filter argument. We
                        # still pass a Face instead of Transport since Face also
                        # has a send method.
                        try:
                            entry.getOnInterest()(
                              entry.getFilter().getPrefix(), interest,
                              entry.getFace(), entry.getInterestFilterId())
                        except:
                            logging.exception("Error in onInterest")
        elif data != None:
            pendingInterests = self._extractEntriesForExpressedInterest(
              data.getName())
            for pendingInterest in pendingInterests:
                try:
                    pendingInterest.getOnData()(pendingInterest.getInterest(), data)
                except:
                    logging.exception("Error in onData")

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import getName [as 别名]
    def onReceivedElement(self, element):
        """
        This is called by the transport's ElementReader to process an
        entire received Data or Interest element.

        :param element: The bytes of the incoming element.
        :type element: An array type with int elements
        """
        # The type codes for TLV Interest and Data packets are chosen to not
        #   conflict with the first byte of a binary XML packet, so we canjust
        #   look at the first byte.
        if not (element[0] == Tlv.Interest or element[0] == Tlv.Data):
            # Ignore non-TLV elements.
            return

        # First, decode as Interest or Data.
        interest = None
        data = None
        decoder = TlvDecoder(element)
        if decoder.peekType(Tlv.Interest, len(element)):
            interest = Interest()
            interest.wireDecode(element, TlvWireFormat.get())
        elif decoder.peekType(Tlv.Data, len(element)):
            data = Data()
            data.wireDecode(element, TlvWireFormat.get())

        # Now process as Interest or Data.
        if interest != None:
            entry = self._getEntryForRegisteredPrefix(interest.getName())
            if entry != None:
                entry.getOnInterest()(
                  entry.getPrefix(), interest, self._transport,
                  entry.getRegisteredPrefixId())
        elif data != None:
            pendingInterests = self._extractEntriesForExpressedInterest(
              data.getName())
            for pendingInterest in pendingInterests:
                pendingInterest.getOnData()(pendingInterest.getInterest(), data)

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import getName [as 别名]
    def _makeAndPublishCkData(self, onError):
        """
        Make a CK Data packet for _ckName encrypted by the KEK in _kekData and
        insert it in the _storage.

        :param onError: On failure, this calls onError(errorCode, message) where
          errorCode is from EncryptError.ErrorCode, and message is an error
          string.
        :type onError: function object
        :return: True on success, else False.
        :rtype: bool
        """
        try:
            kek = PublicKey(self._kekData.getContent())

            content = EncryptedContent()
            content.setPayload(kek.encrypt
              (Blob(self._ckBits, False), EncryptAlgorithmType.RsaOaep))

            ckData = Data(
              Name(self._ckName).append(EncryptorV2.NAME_COMPONENT_ENCRYPTED_BY)
               .append(self._kekData.getName()))
            ckData.setContent(content.wireEncodeV2())
            # FreshnessPeriod can serve as a soft access control for revoking access.
            ckData.getMetaInfo().setFreshnessPeriod(
              EncryptorV2.DEFAULT_CK_FRESHNESS_PERIOD_MS)
            self._keyChain.sign(ckData, self._ckDataSigningInfo)
            self._storage.insert(ckData)

            logging.getLogger(__name__).info("Publishing CK data: " +
              ckData.getName().toUri())
            return True
        except Exception as ex:
            onError(EncryptError.ErrorCode.EncryptionFailure,
              "Failed to encrypt generated CK with KEK " +
              self._kekData.getName().toUri())
            return False

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import getName [as 别名]
class DataValidationState(ValidationState):
    """
    Create a DataValidationState for the Data packet. The caller must ensure
    that the state instance is valid until the validation finishes (i.e., until
    validateCertificateChain() and validateOriginalPacket() have been called).

    :param Data data: The Date packet being validated, which is copied.
    :param successCallback: This calls successCallback(data) to report a
      successful Data validation.
    :type successCallback: function object
    :param failureCallback: This calls failureCallback(data, error) to report a
      failed Data validation, where error is a ValidationError.
    :type failureCallback: function object
    """
    def __init__(self, data, successCallback, failureCallback):
        super(DataValidationState, self).__init__()

        # Make a copy.
        self._data = Data(data)
        self._successCallback = successCallback
        self._failureCallback = failureCallback

        if self._successCallback == None:
            raise ValueError("The successCallback is None")
        if self._failureCallback == None:
            raise ValueError("The failureCallback is None")

    def fail(self, error):
        """
        Call the failure callback.

        :param ValidationError error:
        """
        logging.getLogger(__name__).info("" + str(error))
        try:
            self._failureCallback(self._data, error)
        except:
            logging.exception("Error in failureCallback")

        self.setOutcome(False)

    def getOriginalData(self):
        """
        Get the original Data packet being validated which was given to the
        constructor.

        :return: The original Data packet.
        :rtype: Data
        """
        return self._data

    def _verifyOriginalPacket(self, trustedCertificate):
        """
        Verify the signature of the original packet. This is only called by the
        Validator class.

        :param CertificateV2 trustedCertificate: The certificate that signs the
          original packet.
        """
        if VerificationHelpers.verifyDataSignature(self._data, trustedCertificate):
            logging.getLogger(__name__).info("OK signature for data `" +
              self._data.getName().toUri() + "`")
            try:
                self._successCallback(self._data)
            except:
                logging.exception("Error in successCallback")

            self.setOutcome(True)
        else:
          self.fail(ValidationError(ValidationError.INVALID_SIGNATURE,
            "Invalid signature of data `" + self._data.getName().toUri() + "`"))

    def _bypassValidation(self):
        """
        Call the success callback of the original packet without signature
        validation. This is only called by the Validator class.
        """
        logging.getLogger(__name__).info("Signature verification bypassed for data `" +
          self._data.getName().toUri() + "`")
        try:
            self._successCallback(self._data)
        except:
            logging.exception("Error in successCallback")

        self.setOutcome(True)

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import getName [as 别名]
    def _registerPrefixHelper(
      self, registeredPrefixId, prefix, onInterest, onRegisterFailed, flags,
      wireFormat, face):
        """
        Do the work of registerPrefix to register with NDNx once we have an
        _ndndId.

        :param int registeredPrefixId: The getNextEntryId() which registerPrefix
          got so it could return it to the caller. If this is 0, then don't add
          to _registeredPrefixTable (assuming it has already been done).
        """
        if not WireFormat.ENABLE_NDNX:
            # We can get here if the command signing info is set, but running NDNx.
            raise RuntimeError(
              "registerPrefix with NDNx is deprecated. To enable while you upgrade your code to use NFD, set WireFormat.ENABLE_NDNX = True")

        # Create a ForwardingEntry.
        # Note: ndnd ignores any freshness that is larger than 3600 seconds and
        #   sets 300 seconds instead. To register "forever", (=2000000000 sec),
        #   the freshness period must be omitted.
        forwardingEntry = ForwardingEntry()
        forwardingEntry.setAction("selfreg")
        forwardingEntry.setPrefix(prefix)
        forwardingEntry.setForwardingFlags(flags)
        content = forwardingEntry.wireEncode(wireFormat)

        # Set the ForwardingEntry as the content of a Data packet and sign.
        data = Data()
        data.setContent(content)
        # Set the name to a random value so that each request is unique.
        nonce = bytearray(4)
        for i in range(len(nonce)):
            nonce[i] = _systemRandom.randint(0, 0xff)
        data.getName().append(nonce)
        # The ndnd ignores the signature, so set to blank values.
        data.getSignature().getKeyLocator().setType(
          KeyLocatorType.KEY_LOCATOR_DIGEST)
        data.getSignature().getKeyLocator().setKeyData(
          Blob(bytearray(32), False))
        data.getSignature().setSignature(Blob(bytearray(128), False))
        encodedData = data.wireEncode(wireFormat)

        # Create an interest where the name has the encoded Data packet.
        interestName = Name().append("ndnx").append(self._ndndId).append(
          "selfreg").append(encodedData)

        interest = Interest(interestName)
        interest.setInterestLifetimeMilliseconds(4000.0)
        interest.setScope(1)

        if registeredPrefixId != 0:
            interestFilterId = 0
            if onInterest != None:
                # registerPrefix was called with the "combined" form that includes
                # the callback, so add an InterestFilterEntry.
                interestFilterId = self.getNextEntryId()
                self.setInterestFilter(
                  interestFilterId, InterestFilter(prefix), onInterest, face)

            self._registeredPrefixTable.append(Node._RegisteredPrefix(
              registeredPrefixId, prefix, interestFilterId))

        # Send the registration interest.
        response = Node._RegisterResponse(
          self, prefix, onInterest, onRegisterFailed, flags, wireFormat, False,
          face)
        self.expressInterest(
          self.getNextEntryId(), interest, response.onData, response.onTimeout,
          wireFormat, face)

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import getName [as 别名]
    def onReceivedElement(self, element):
        """
        This is called by the transport's ElementReader to process an
        entire received Data or Interest element.

        :param element: The bytes of the incoming element.
        :type element: An array type with int elements
        """
        # The type codes for TLV Interest and Data packets are chosen to not
        #   conflict with the first byte of a binary XML packet, so we canjust
        #   look at the first byte.
        if not (element[0] == Tlv.Interest or element[0] == Tlv.Data):
            # Ignore non-TLV elements.
            # Assume it is Binary XML.
            if not WireFormat.ENABLE_NDNX:
                raise RuntimeError(
                  "BinaryXmlWireFormat (NDNx) is deprecated. To enable while you upgrade your network to use NDN-TLV, set WireFormat.ENABLE_NDNX = True")

            return

        # First, decode as Interest or Data.
        interest = None
        data = None
        decoder = TlvDecoder(element)
        if decoder.peekType(Tlv.Interest, len(element)):
            interest = Interest()
            interest.wireDecode(element, TlvWireFormat.get())
        elif decoder.peekType(Tlv.Data, len(element)):
            data = Data()
            data.wireDecode(element, TlvWireFormat.get())

        # Now process as Interest or Data.
        if interest != None:
            # Call all interest filter callbacks which match.
            for i in range(len(self._interestFilterTable)):
                entry = self._interestFilterTable[i]
                if entry.getFilter().doesMatch(interest.getName()):
                    includeFilter = True
                    # Use getcallargs to test if onInterest accepts 5 args.
                    try:
                        inspect.getcallargs(entry.getOnInterest(),
                          None, None, None, None, None)
                    except TypeError:
                        # Assume onInterest is old-style with 4 arguments.
                        includeFilter = False

                    if includeFilter:
                        entry.getOnInterest()(
                          entry.getFilter().getPrefix(), interest,
                          entry.getFace(), entry.getInterestFilterId(),
                          entry.getFilter())
                    else:
                        # Old-style onInterest without the filter argument. We
                        # still pass a Face instead of Transport since Face also
                        # has a send method.
                        entry.getOnInterest()(
                          entry.getFilter().getPrefix(), interest,
                          entry.getFace(), entry.getInterestFilterId())
        elif data != None:
            pendingInterests = self._extractEntriesForExpressedInterest(
              data.getName())
            for pendingInterest in pendingInterests:
                pendingInterest.getOnData()(pendingInterest.getInterest(), data)