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push_opener.go
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push_opener.go
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package bertypush
import (
"context"
"encoding/base64"
"encoding/json"
"fmt"
"path"
"strings"
"time"
"github.com/gogo/protobuf/proto"
"go.uber.org/zap"
"berty.tech/berty/v2/go/internal/accountutils"
"berty.tech/berty/v2/go/internal/bertylinks"
"berty.tech/berty/v2/go/internal/logutil"
"berty.tech/berty/v2/go/internal/messengerdb"
"berty.tech/berty/v2/go/internal/messengerpayloads"
"berty.tech/berty/v2/go/pkg/accounttypes"
"berty.tech/berty/v2/go/pkg/errcode"
"berty.tech/berty/v2/go/pkg/messengertypes"
"berty.tech/berty/v2/go/pkg/pushtypes"
)
func PushDecryptStandalone(logger *zap.Logger, rootDir string, inputB64 string, ks accountutils.NativeKeystore) (*pushtypes.DecryptedPush, error) {
input, err := base64.RawURLEncoding.DecodeString(inputB64)
if err != nil {
return nil, errcode.ErrInvalidInput.Wrap(err)
}
ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
defer cancel()
rawPushData, accountData, err := PushDecrypt(ctx, rootDir, input, &PushDecryptOpts{Logger: logger, Keystore: ks})
if err != nil {
return nil, errcode.ErrPushUnableToDecrypt.Wrap(err)
}
return PushEnrich(rawPushData, accountData, logger)
}
func PushEnrich(rawPushData *messengertypes.PushReceivedData, accountData *accounttypes.AccountMetadata, logger *zap.Logger) (*pushtypes.DecryptedPush, error) {
if accountData == nil {
return nil, errcode.ErrInvalidInput.Wrap(fmt.Errorf("no account metadata specified"))
}
link, err := bertylinks.InternalLinkToMessage(accountData.AccountID, rawPushData.Interaction.ConversationPublicKey, rawPushData.Interaction.CID)
if err != nil {
logger.Error("unable to create link for interaction", logutil.PrivateString("cid", string(rawPushData.ProtocolData.Message.CID)), zap.Error(err))
link = bertylinks.LinkInternalPrefix
}
d := &pushtypes.DecryptedPush{
AccountID: accountData.AccountID,
AccountName: accountData.Name,
ConversationPublicKey: rawPushData.Interaction.ConversationPublicKey,
ConversationDisplayName: rawPushData.Interaction.Conversation.DisplayName,
MemberPublicKey: rawPushData.Interaction.MemberPublicKey,
PushType: pushtypes.DecryptedPush_Unknown,
PayloadAttrsJSON: "{}",
DeepLink: link,
AlreadyReceived: rawPushData.AlreadyReceived,
}
if rawPushData.Interaction.Member != nil {
d.MemberDisplayName = rawPushData.Interaction.Member.DisplayName
}
payloadAttrs := map[string]string{}
switch rawPushData.Interaction.Type {
case messengertypes.AppMessage_TypeUserMessage:
m := &messengertypes.AppMessage_UserMessage{}
err := proto.Unmarshal(rawPushData.Interaction.Payload, m)
if err != nil {
logger.Error("unable to unmarshal user message", logutil.PrivateString("cid", string(rawPushData.ProtocolData.Message.CID)), zap.Error(err))
break
}
if l := len(rawPushData.Interaction.Medias); l > 0 {
switch {
case !checkAllMediasHaveSameMime(rawPushData.Interaction.Medias):
d.PushType = pushtypes.DecryptedPush_Media
case strings.HasSuffix(rawPushData.Interaction.Medias[0].MimeType, "gif"):
d.PushType = pushtypes.DecryptedPush_Gif
case strings.HasPrefix(rawPushData.Interaction.Medias[0].MimeType, "image/"):
d.PushType = pushtypes.DecryptedPush_Photo
case strings.HasPrefix(rawPushData.Interaction.Medias[0].MimeType, "audio/"):
d.PushType = pushtypes.DecryptedPush_VoiceMessage
default:
d.PushType = pushtypes.DecryptedPush_Media
}
payloadAttrs["medias-count"] = fmt.Sprintf("%d", l)
break
}
if m.Body == "" {
break
}
d.PushType = pushtypes.DecryptedPush_Message
payloadAttrs["message"] = m.Body
case messengertypes.AppMessage_TypeUserReaction:
d.PushType = pushtypes.DecryptedPush_Reaction
r := &messengertypes.AppMessage_UserReaction{}
err := proto.Unmarshal(rawPushData.Interaction.Payload, r)
if err != nil {
logger.Error("unable to unmarshal reaction", logutil.PrivateString("cid", string(rawPushData.ProtocolData.Message.CID)), zap.Error(err))
break
}
payloadAttrs["reaction"] = r.Emoji
// IDEA: ignore if reaction's targeted message is not send by the user if possible (i.e. not on iOS)
case messengertypes.AppMessage_TypeGroupInvitation:
d.PushType = pushtypes.DecryptedPush_GroupInvitation
invitation := &messengertypes.AppMessage_GroupInvitation{}
err := proto.Unmarshal(rawPushData.Interaction.Payload, invitation)
if err != nil {
logger.Error("unable to unmarshal group invitation", logutil.PrivateString("cid", string(rawPushData.ProtocolData.Message.CID)), zap.Error(err))
break
}
link, err := bertylinks.UnmarshalLink(invitation.Link, nil)
if err != nil {
logger.Error("unable to unmarshal group invitation link", logutil.PrivateString("link", invitation.Link), logutil.PrivateString("cid", string(rawPushData.ProtocolData.Message.CID)), zap.Error(err))
break
}
if link.Kind != messengertypes.BertyLink_GroupV1Kind {
logger.Error("invalid group invitation link received", logutil.PrivateString("cid", string(rawPushData.ProtocolData.Message.CID)), zap.String("link-kind", link.Kind.String()))
break
}
payloadAttrs["group-name"] = link.BertyGroup.DisplayName
case messengertypes.AppMessage_TypeSetGroupInfo:
d.PushType = pushtypes.DecryptedPush_ConversationNameChanged
case messengertypes.AppMessage_TypeSetUserInfo:
// pushType = DecryptedPush_MemberNameChanged
// pushType = DecryptedPush_MemberPictureChanged
d.PushType = pushtypes.DecryptedPush_MemberDetailsChanged
// TODO: get old values
case messengertypes.AppMessage_TypeAcknowledge:
logger.Debug("received a push notification for an ack, this should not happen", logutil.PrivateString("cid", rawPushData.Interaction.CID))
case messengertypes.AppMessage_TypeReplyOptions:
d.PushType = pushtypes.DecryptedPush_ReplyOptions
default:
logger.Debug("unknown message type", zap.String("message-type", rawPushData.Interaction.Type.String()), logutil.PrivateString("cid", rawPushData.Interaction.CID))
}
if len(payloadAttrs) > 0 {
jsoned, err := json.Marshal(payloadAttrs)
if err == nil {
d.PayloadAttrsJSON = string(jsoned)
}
}
return d, nil
}
type PushDecryptOpts struct {
Logger *zap.Logger
Keystore accountutils.NativeKeystore
ExcludedAccounts []string
}
func PushDecrypt(ctx context.Context, rootDir string, input []byte, opts *PushDecryptOpts) (*messengertypes.PushReceivedData, *accounttypes.AccountMetadata, error) {
if opts == nil {
opts = &PushDecryptOpts{}
}
if opts.Logger == nil {
opts.Logger = zap.NewNop()
}
_, pushSK, err := accountutils.GetDevicePushKeyForPath(path.Join(rootDir, accountutils.DefaultPushKeyFilename), false)
if err != nil {
return nil, nil, errcode.ErrPushUnableToDecrypt.Wrap(fmt.Errorf("device has no known push key"))
}
accounts, err := accountutils.ListAccounts(rootDir, opts.Keystore, opts.Logger)
if err != nil {
return nil, nil, err
}
if len(accounts) == 0 {
return nil, nil, errcode.ErrInvalidInput.Wrap(fmt.Errorf("no accounts found"))
}
var errs []error
for _, account := range accounts {
data, err := func() (*messengertypes.PushReceivedData, error) {
var reply *messengertypes.PushReceive_Reply
ignoreAccount := false
for _, excluded := range opts.ExcludedAccounts {
if account.AccountID == excluded {
ignoreAccount = true
break
}
}
if ignoreAccount {
return nil, nil
}
accountDir, err := accountutils.GetDatastoreDir(accountutils.GetAccountDir(rootDir, account.AccountID))
if err != nil {
return nil, err
}
var storageKey []byte
if opts.Keystore != nil {
if storageKey, err = accountutils.GetOrCreateStorageKeyForAccount(opts.Keystore, account.AccountID); err != nil {
return nil, err
}
}
rootDS, err := accountutils.GetRootDatastoreForPath(accountDir, storageKey, opts.Logger)
if err != nil {
return nil, err
}
defer rootDS.Close()
db, dbCleanup, err := accountutils.GetMessengerDBForPath(accountDir, storageKey, opts.Logger)
if err != nil {
return nil, err
}
defer dbCleanup()
pushHandler, err := NewPushHandler(&PushHandlerOpts{
Logger: opts.Logger,
RootDatastore: rootDS,
PushKey: pushSK,
})
if err != nil {
return nil, errcode.ErrInternal.Wrap(fmt.Errorf("unable to initialize push handler: %w", err))
}
evtHandler := messengerpayloads.NewEventHandler(ctx, messengerdb.NewDBWrapper(db, opts.Logger), nil, messengertypes.NewPostActionsServiceNoop(), opts.Logger, nil, false)
pushReceiver := NewPushReceiver(pushHandler, evtHandler, opts.Logger)
reply, err = pushReceiver.PushReceive(ctx, input)
if err != nil {
opts.Logger.Warn("unable to decrypt push", logutil.PrivateString("account-id", account.AccountID), zap.Error(err))
return nil, err
}
return reply.Data, nil
}()
if err != nil {
errs = append(errs, err)
continue
}
if data != nil {
return data, account, nil
}
}
if len(errs) == 0 {
return nil, nil, errcode.ErrInternal.Wrap(fmt.Errorf("no account can decrypt the received push message"))
}
// only returning the first error
return nil, nil, errcode.ErrPushUnableToDecrypt.Wrap(errs[0])
}
func checkAllMediasHaveSameMime(medias []*messengertypes.Media) bool {
if len(medias) < 2 {
return true
}
firstType := medias[0].MimeType
for i := range medias {
if firstType != medias[i].MimeType {
return false
}
}
return true
}