status-go/protocol/message_validator.go

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package protocol
import (
"errors"
"fmt"
"strconv"
"strings"
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"github.com/status-im/status-go/protocol/protobuf"
"github.com/status-im/status-go/protocol/v1"
)
const maxChatMessageTextLength = 4096
const maxStatusMessageText = 128
// maxWhisperDrift is how many milliseconds we allow the clock value to differ
// from whisperTimestamp
const maxWhisperFutureDriftMs uint64 = 120000
func validateClockValue(clock uint64, whisperTimestamp uint64) error {
if clock == 0 {
return errors.New("clock can't be 0")
}
if clock > whisperTimestamp && clock-whisperTimestamp > maxWhisperFutureDriftMs {
return errors.New("clock value too high")
}
return nil
}
func ValidateMembershipUpdateMessage(message *protocol.MembershipUpdateMessage, timeNowMs uint64) error {
for _, e := range message.Events {
if err := validateClockValue(e.ClockValue, timeNowMs); err != nil {
return err
}
}
return nil
}
func ValidateStatusUpdate(message protobuf.StatusUpdate) error {
if message.Clock == 0 {
return errors.New("clock can't be 0")
}
if message.StatusType == protobuf.StatusUpdate_UNKNOWN_STATUS_TYPE {
return errors.New("unknown status type")
}
if len([]rune(message.CustomText)) > maxStatusMessageText {
return fmt.Errorf("custom text shouldn't be longer than %d", maxStatusMessageText)
}
return nil
}
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func ValidateEditMessage(message protobuf.EditMessage) error {
if message.Clock == 0 {
return errors.New("clock can't be 0")
}
if len(message.ChatId) == 0 {
return errors.New("chat-id can't be empty")
}
if len(message.MessageId) == 0 {
return errors.New("message-id can't be empty")
}
if message.MessageType == protobuf.MessageType_UNKNOWN_MESSAGE_TYPE || message.MessageType == protobuf.MessageType_SYSTEM_MESSAGE_PRIVATE_GROUP {
return errors.New("unknown message type")
}
return ValidateText(message.Text)
}
func ValidateDeleteMessage(message protobuf.DeleteMessage) error {
if len(message.ChatId) == 0 {
return errors.New("chat-id can't be empty")
}
if len(message.MessageId) == 0 {
return errors.New("message-id can't be empty")
}
if message.MessageType == protobuf.MessageType_UNKNOWN_MESSAGE_TYPE || message.MessageType == protobuf.MessageType_SYSTEM_MESSAGE_PRIVATE_GROUP {
return errors.New("unknown message type")
}
return nil
}
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func ValidateDeleteForMeMessage(message protobuf.DeleteForMeMessage) error {
if len(message.MessageId) == 0 {
return errors.New("message-id can't be empty")
}
return nil
}
func ValidateReceivedPairInstallation(message *protobuf.PairInstallation, whisperTimestamp uint64) error {
if err := validateClockValue(message.Clock, whisperTimestamp); err != nil {
return err
}
if len(strings.TrimSpace(message.Name)) == 0 {
return errors.New("name can't be empty")
}
if len(strings.TrimSpace(message.DeviceType)) == 0 {
return errors.New("device type can't be empty")
}
if len(strings.TrimSpace(message.InstallationId)) == 0 {
return errors.New("installationId can't be empty")
}
return nil
}
func ValidateReceivedSendTransaction(message *protobuf.SendTransaction, whisperTimestamp uint64) error {
if err := validateClockValue(message.Clock, whisperTimestamp); err != nil {
return err
}
if len(strings.TrimSpace(message.TransactionHash)) == 0 {
return errors.New("transaction hash can't be empty")
}
if message.Signature == nil {
return errors.New("signature can't be nil")
}
return nil
}
func ValidateReceivedRequestAddressForTransaction(message *protobuf.RequestAddressForTransaction, whisperTimestamp uint64) error {
if err := validateClockValue(message.Clock, whisperTimestamp); err != nil {
return err
}
if len(strings.TrimSpace(message.Value)) == 0 {
return errors.New("value can't be empty")
}
_, err := strconv.ParseFloat(message.Value, 64)
if err != nil {
return err
}
return nil
}
func ValidateReceivedRequestTransaction(message *protobuf.RequestTransaction, whisperTimestamp uint64) error {
if err := validateClockValue(message.Clock, whisperTimestamp); err != nil {
return err
}
if len(strings.TrimSpace(message.Value)) == 0 {
return errors.New("value can't be empty")
}
if len(strings.TrimSpace(message.Address)) == 0 {
return errors.New("address can't be empty")
}
_, err := strconv.ParseFloat(message.Value, 64)
if err != nil {
return err
}
return nil
}
func ValidateReceivedAcceptRequestAddressForTransaction(message *protobuf.AcceptRequestAddressForTransaction, whisperTimestamp uint64) error {
if err := validateClockValue(message.Clock, whisperTimestamp); err != nil {
return err
}
if len(message.Id) == 0 {
return errors.New("messageID can't be empty")
}
if len(strings.TrimSpace(message.Address)) == 0 {
return errors.New("address can't be empty")
}
return nil
}
func ValidateReceivedDeclineRequestAddressForTransaction(message *protobuf.DeclineRequestAddressForTransaction, whisperTimestamp uint64) error {
if err := validateClockValue(message.Clock, whisperTimestamp); err != nil {
return err
}
if len(message.Id) == 0 {
return errors.New("messageID can't be empty")
}
return nil
}
func ValidateReceivedDeclineRequestTransaction(message *protobuf.DeclineRequestTransaction, whisperTimestamp uint64) error {
if err := validateClockValue(message.Clock, whisperTimestamp); err != nil {
return err
}
if len(message.Id) == 0 {
return errors.New("messageID can't be empty")
}
return nil
}
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func ValidateText(text string) error {
if len(strings.TrimSpace(text)) == 0 {
return errors.New("text can't be empty")
}
if len([]rune(text)) > maxChatMessageTextLength {
return fmt.Errorf("text shouldn't be longer than %d", maxChatMessageTextLength)
}
return nil
}
func ValidateReceivedChatMessage(message *protobuf.ChatMessage, whisperTimestamp uint64) error {
if err := validateClockValue(message.Clock, whisperTimestamp); err != nil {
return err
}
if message.Timestamp == 0 {
return errors.New("timestamp can't be 0")
}
if message.ContentType != protobuf.ChatMessage_DISCORD_MESSAGE && (message.ContentType != protobuf.ChatMessage_IMAGE || message.Text != "") {
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if err := ValidateText(message.Text); err != nil {
return err
}
}
if len(message.ChatId) == 0 {
return errors.New("chatId can't be empty")
}
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if message.MessageType == protobuf.MessageType_UNKNOWN_MESSAGE_TYPE || message.MessageType == protobuf.MessageType_SYSTEM_MESSAGE_PRIVATE_GROUP {
return errors.New("unknown message type")
}
switch message.ContentType {
case protobuf.ChatMessage_UNKNOWN_CONTENT_TYPE:
return errors.New("unknown content type")
case protobuf.ChatMessage_TRANSACTION_COMMAND:
return errors.New("can't receive request address for transaction from others")
case protobuf.ChatMessage_STICKER:
if message.Payload == nil {
return errors.New("no sticker content")
}
sticker := message.GetSticker()
if sticker == nil {
return errors.New("no sticker content")
}
if len(sticker.Hash) == 0 {
return errors.New("sticker hash not set")
}
case protobuf.ChatMessage_IMAGE:
if message.Payload == nil {
return errors.New("no image content")
}
image := message.GetImage()
if image == nil {
return errors.New("no image content")
}
if len(image.Payload) == 0 {
return errors.New("image payload empty")
}
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if image.Type == protobuf.ImageType_UNKNOWN_IMAGE_TYPE {
return errors.New("image type unknown")
}
}
if message.ContentType == protobuf.ChatMessage_AUDIO {
if message.Payload == nil {
return errors.New("no audio content")
}
audio := message.GetAudio()
if audio == nil {
return errors.New("no audio content")
}
if len(audio.Payload) == 0 {
return errors.New("audio payload empty")
}
if audio.Type == protobuf.AudioMessage_UNKNOWN_AUDIO_TYPE {
return errors.New("audio type unknown")
}
}
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if err := ValidateDisplayName(&message.DisplayName); err != nil {
return err
}
return nil
}
func ValidateReceivedEmojiReaction(emoji *protobuf.EmojiReaction, whisperTimestamp uint64) error {
if err := validateClockValue(emoji.Clock, whisperTimestamp); err != nil {
return err
}
if len(emoji.MessageId) == 0 {
return errors.New("message-id can't be empty")
}
if len(emoji.ChatId) == 0 {
return errors.New("chat-id can't be empty")
}
if emoji.Type == protobuf.EmojiReaction_UNKNOWN_EMOJI_REACTION_TYPE {
return errors.New("unknown emoji reaction type")
}
if emoji.MessageType == protobuf.MessageType_UNKNOWN_MESSAGE_TYPE {
return errors.New("unknown message type")
}
return nil
}
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func ValidateReceivedGroupChatInvitation(invitation *protobuf.GroupChatInvitation) error {
if len(invitation.ChatId) == 0 {
return errors.New("chat-id can't be empty")
}
return nil
}