/// <summary> /// Validates ActivityInformation structure by itself. This function does not touch database and does not validate /// anything that depends on the context. /// </summary> /// <param name="Activity">Description of the activity to validate.</param> /// <param name="OwnerIdentityPublicKey">Public key of the activity's owner identity.</param> /// <param name="MessageBuilder">Network message builder of the client who sent this activity description.</param> /// <param name="RequestMessage">Full request message from client.</param> /// <param name="ErrorPrefix">Prefix to add to the validation error details.</param> /// <param name="ErrorResponse">If the function fails, this is filled with error response message that is ready to be sent to the client.</param> /// <returns>true if the activity information is valid, false otherwise.</returns> public static bool ValidateActivityInformation(ActivityInformation Activity, byte[] OwnerIdentityPublicKey, ProxMessageBuilder MessageBuilder, ProxProtocolMessage RequestMessage, string ErrorPrefix, out ProxProtocolMessage ErrorResponse) { log.Trace("()"); bool res = false; ErrorResponse = null; string details = null; if (Activity == null) { Activity = new ActivityInformation(); } if (Activity.ProfileServerContact == null) { Activity.ProfileServerContact = new ServerContactInfo(); } SemVer version = new SemVer(Activity.Version); // Currently only supported version is 1.0.0. if (!version.Equals(SemVer.V100)) { log.Debug("Unsupported version '{0}'.", version); details = "version"; } if (details == null) { uint activityId = Activity.Id; // 0 is not a valid activity identifier. if (activityId == 0) { log.Debug("Invalid activity ID '{0}'.", activityId); details = "id"; } } if (details == null) { byte[] pubKey = Activity.OwnerPublicKey.ToByteArray(); bool pubKeyValid = (0 < pubKey.Length) && (pubKey.Length <= ProtocolHelper.MaxPublicKeyLengthBytes) && ByteArrayComparer.Equals(OwnerIdentityPublicKey, pubKey); if (!pubKeyValid) { log.Debug("Invalid public key '{0}' does not match identity public key '{1}'.", pubKey.ToHex(), OwnerIdentityPublicKey.ToHex()); details = "ownerPublicKey"; } } if (details == null) { ServerContactInfo sci = Activity.ProfileServerContact; bool networkIdValid = sci.NetworkId.Length == ProtocolHelper.NetworkIdentifierLength; IPAddress ipAddress = IPAddressExtensions.IpFromBytes(sci.IpAddress.ToByteArray()); bool ipAddressValid = (ipAddress != null) && (Config.Configuration.TestModeEnabled || !ipAddress.IsReservedOrLocal()); bool portValid = (1 <= sci.PrimaryPort) && (sci.PrimaryPort <= 65535); if (!networkIdValid || !ipAddressValid || !portValid) { log.Debug("Profile server contact's network ID is {0}, IP address is {1}, port is {2}.", networkIdValid ? "valid" : "invalid", ipAddressValid ? "valid" : "invalid", portValid ? "valid" : "invalid"); if (!networkIdValid) { details = "profileServerContact.networkId"; } else if (!ipAddressValid) { details = "profileServerContact.ipAddress"; } else if (!portValid) { details = "profileServerContact.primaryPort"; } } } if (details == null) { string activityType = Activity.Type; if (activityType == null) { activityType = ""; } int byteLen = Encoding.UTF8.GetByteCount(activityType); bool activityTypeValid = (0 < byteLen) && (byteLen <= ProxMessageBuilder.MaxActivityTypeLengthBytes); if (!activityTypeValid) { log.Debug("Activity type too long or zero length ({0} bytes, limit is {1}).", byteLen, ProxMessageBuilder.MaxActivityTypeLengthBytes); details = "type"; } } if (details == null) { GpsLocation locLat = new GpsLocation(Activity.Latitude, 0); GpsLocation locLong = new GpsLocation(0, Activity.Longitude); if (!locLat.IsValid()) { log.Debug("Latitude '{0}' is not a valid GPS latitude value.", Activity.Latitude); details = "latitude"; } else if (!locLong.IsValid()) { log.Debug("Longitude '{0}' is not a valid GPS longitude value.", Activity.Longitude); details = "longitude"; } } if (details == null) { uint precision = Activity.Precision; bool precisionValid = (0 <= precision) && (precision <= ProxMessageBuilder.MaxLocationPrecision); if (!precisionValid) { log.Debug("Precision '{0}' is not an integer between 0 and {1}.", precision, ProxMessageBuilder.MaxLocationPrecision); details = "precision"; } } if (details == null) { DateTime?startTime = ProtocolHelper.UnixTimestampMsToDateTime(Activity.StartTime); DateTime?expirationTime = ProtocolHelper.UnixTimestampMsToDateTime(Activity.ExpirationTime); if (startTime == null) { log.Debug("Invalid activity start time timestamp '{0}'.", Activity.StartTime); details = "startTime"; } else if (expirationTime == null) { log.Debug("Invalid activity expiration time timestamp '{0}'.", Activity.ExpirationTime); details = "expirationTime"; } else { if (startTime > expirationTime) { log.Debug("Activity expiration time has to be greater than or equal to its start time."); details = "expirationTime"; } else if (expirationTime.Value > DateTime.UtcNow.AddHours(ActivityBase.MaxActivityLifeTimeHours)) { log.Debug("Activity expiration time {0} is more than {1} hours in the future.", expirationTime.Value.ToString("yyyy-MM-dd HH:mm:ss"), ActivityBase.MaxActivityLifeTimeHours); details = "expirationTime"; } } } if (details == null) { string extraData = Activity.ExtraData; if (extraData == null) { extraData = ""; } // Extra data is semicolon separated 'key=value' list, max ActivityBase.MaxActivityExtraDataLengthBytes bytes long. int byteLen = Encoding.UTF8.GetByteCount(extraData); if (byteLen > ProxMessageBuilder.MaxActivityExtraDataLengthBytes) { log.Debug("Extra data too large ({0} bytes, limit is {1}).", byteLen, ProxMessageBuilder.MaxActivityExtraDataLengthBytes); details = "extraData"; } } if (details == null) { res = true; } else { ErrorResponse = MessageBuilder.CreateErrorInvalidValueResponse(RequestMessage, ErrorPrefix + details); } log.Trace("(-):{0}", res); return(res); }