forked from MirrorHub/mautrix-whatsapp
Add support for encrypting preview image
This commit is contained in:
Tulir Asokan
parent
d4334f5df8
commit
9fee8a50a4
3 changed files with 58 additions and 33 deletions
2
go.mod
2
go.mod
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@ -10,7 +10,7 @@ require (
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github.com/prometheus/client_golang v1.11.0
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github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
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github.com/tidwall/gjson v1.13.0
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go.mau.fi/whatsmeow v0.0.0-20220204175019-e490de34933c
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go.mau.fi/whatsmeow v0.0.0-20220204210537-a425ddb0b16c
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golang.org/x/image v0.0.0-20211028202545-6944b10bf410
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google.golang.org/protobuf v1.27.1
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gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
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4
go.sum
4
go.sum
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@ -140,8 +140,8 @@ github.com/tidwall/sjson v1.2.4 h1:cuiLzLnaMeBhRmEv00Lpk3tkYrcxpmbU81tAY4Dw0tc=
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github.com/tidwall/sjson v1.2.4/go.mod h1:098SZ494YoMWPmMO6ct4dcFnqxwj9r/gF0Etp19pSNM=
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go.mau.fi/libsignal v0.0.0-20211109153248-a67163214910 h1:9FFhG0OmkuMau5UEaTgiUQ+7cSbtbOQ7hiWKdN8OI3I=
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go.mau.fi/libsignal v0.0.0-20211109153248-a67163214910/go.mod h1:AufGrvVh+00Nc07Jm4hTquh7yleZyn20tKJI2wCPAKg=
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go.mau.fi/whatsmeow v0.0.0-20220204175019-e490de34933c h1:AVSYHQ0N5n3buL+thypCk2jiltD+3+pUQ7oPVhC7I3w=
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go.mau.fi/whatsmeow v0.0.0-20220204175019-e490de34933c/go.mod h1:8jUjOAi3xtGubxcZgG8uSHpAdyQXBRbWAfxkctX/4y4=
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go.mau.fi/whatsmeow v0.0.0-20220204210537-a425ddb0b16c h1:hwuZ1W55J2uSwm029dREAr6crSVa+i5VsF91ltK389k=
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go.mau.fi/whatsmeow v0.0.0-20220204210537-a425ddb0b16c/go.mod h1:8jUjOAi3xtGubxcZgG8uSHpAdyQXBRbWAfxkctX/4y4=
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golang.org/x/crypto v0.0.0-20170930174604-9419663f5a44/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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@ -22,10 +22,13 @@ import (
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"encoding/json"
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"image"
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"net/http"
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"strings"
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"time"
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"github.com/tidwall/gjson"
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"google.golang.org/protobuf/proto"
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"maunium.net/go/mautrix/appservice"
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"maunium.net/go/mautrix/crypto/attachment"
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"maunium.net/go/mautrix/event"
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"maunium.net/go/mautrix/id"
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@ -34,16 +37,19 @@ import (
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)
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type BeeperLinkPreview struct {
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MatchedURL string `json:"matched_url"`
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CanonicalURL string `json:"og:url,omitempty"`
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Title string `json:"og:title,omitempty"`
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Type string `json:"og:type,omitempty"`
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Description string `json:"og:description,omitempty"`
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Image id.ContentURIString `json:"og:image,omitempty"`
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ImageWidth int `json:"og:image:width,omitempty"`
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ImageHeight int `json:"og:image:height,omitempty"`
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MatchedURL string `json:"matched_url"`
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CanonicalURL string `json:"og:url,omitempty"`
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Title string `json:"og:title,omitempty"`
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Type string `json:"og:type,omitempty"`
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Description string `json:"og:description,omitempty"`
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MatchedURLFallback string `json:"matchedUrl"`
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ImageURL id.ContentURIString `json:"og:image,omitempty"`
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ImageEncryption *event.EncryptedFileInfo `json:"beeper:image:encryption,omitempty"`
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ImageSize int `json:"matrix:image:size,omitempty"`
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ImageWidth int `json:"og:image:width,omitempty"`
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ImageHeight int `json:"og:image:height,omitempty"`
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ImageType string `json:"og:image:type,omitempty"`
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}
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func (portal *Portal) convertURLPreviewToBeeper(intent *appservice.IntentAPI, source *User, msg *waProto.ExtendedTextMessage) (output *BeeperLinkPreview) {
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@ -57,7 +63,6 @@ func (portal *Portal) convertURLPreviewToBeeper(intent *appservice.IntentAPI, so
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Title: msg.GetTitle(),
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Description: msg.GetDescription(),
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}
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output.MatchedURLFallback = output.MatchedURL
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if len(output.CanonicalURL) == 0 {
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output.CanonicalURL = output.MatchedURL
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}
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@ -73,19 +78,32 @@ func (portal *Portal) convertURLPreviewToBeeper(intent *appservice.IntentAPI, so
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thumbnailData = msg.JpegThumbnail
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}
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if thumbnailData != nil {
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mxc, err := intent.UploadBytes(thumbnailData, http.DetectContentType(thumbnailData))
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output.ImageHeight = int(msg.GetThumbnailHeight())
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output.ImageWidth = int(msg.GetThumbnailWidth())
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if output.ImageHeight == 0 || output.ImageWidth == 0 {
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src, _, err := image.Decode(bytes.NewReader(thumbnailData))
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if err == nil {
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imageBounds := src.Bounds()
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output.ImageWidth, output.ImageHeight = imageBounds.Max.X, imageBounds.Max.Y
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}
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}
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output.ImageSize = len(thumbnailData)
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output.ImageType = http.DetectContentType(thumbnailData)
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uploadData, uploadMime := thumbnailData, output.ImageType
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if portal.Encrypted {
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crypto := attachment.NewEncryptedFile()
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uploadData = crypto.Encrypt(uploadData)
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uploadMime = "application/octet-stream"
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output.ImageEncryption = &event.EncryptedFileInfo{EncryptedFile: *crypto}
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}
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resp, err := intent.UploadBytes(uploadData, uploadMime)
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if err != nil {
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portal.log.Warnfln("Failed to reupload thumbnail for link preview: %v", err)
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} else {
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output.Image = mxc.ContentURI.CUString()
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output.ImageHeight = int(msg.GetThumbnailHeight())
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output.ImageWidth = int(msg.GetThumbnailWidth())
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if output.ImageHeight == 0 || output.ImageWidth == 0 {
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src, _, err := image.Decode(bytes.NewReader(thumbnailData))
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if err == nil {
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imageBounds := src.Bounds()
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output.ImageWidth, output.ImageHeight = imageBounds.Max.X, imageBounds.Max.Y
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}
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if output.ImageEncryption != nil {
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output.ImageEncryption.URL = resp.ContentURI.CUString()
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} else {
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output.ImageURL = resp.ContentURI.CUString()
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}
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}
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}
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@ -102,16 +120,9 @@ func (portal *Portal) convertURLPreviewToWhatsApp(sender *User, evt *event.Event
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return
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}
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var preview BeeperLinkPreview
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if err := json.Unmarshal([]byte(rawPreview.Raw), &preview); err != nil {
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if err := json.Unmarshal([]byte(rawPreview.Raw), &preview); err != nil || len(preview.MatchedURL) == 0 {
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return
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}
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if len(preview.MatchedURL) == 0 {
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if len(preview.MatchedURLFallback) == 0 {
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return
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} else {
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preview.MatchedURL = preview.MatchedURLFallback
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}
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}
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dest.MatchedText = &preview.MatchedURL
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if len(preview.CanonicalURL) > 0 {
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@ -123,13 +134,27 @@ func (portal *Portal) convertURLPreviewToWhatsApp(sender *User, evt *event.Event
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if len(preview.Title) > 0 {
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dest.Title = &preview.Title
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}
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imageMXC := preview.Image.ParseOrIgnore()
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if strings.HasPrefix(preview.Type, "video.") {
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dest.PreviewType = waProto.ExtendedTextMessage_VIDEO.Enum()
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}
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imageMXC := preview.ImageURL.ParseOrIgnore()
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if preview.ImageEncryption != nil {
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imageMXC = preview.ImageEncryption.URL.ParseOrIgnore()
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}
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if !imageMXC.IsEmpty() {
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data, err := portal.MainIntent().DownloadBytes(imageMXC)
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if err != nil {
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portal.log.Errorfln("Failed to download URL preview image %s: %v", preview.Image, err)
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portal.log.Errorfln("Failed to download URL preview image %s in %s: %v", preview.ImageURL, evt.ID, err)
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return
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}
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if preview.ImageEncryption != nil {
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data, err = preview.ImageEncryption.Decrypt(data)
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if err != nil {
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portal.log.Errorfln("Failed to decrypt URL preview image in %s: %v", evt.ID, err)
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return
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}
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}
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dest.MediaKeyTimestamp = proto.Int64(time.Now().Unix())
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uploadResp, err := sender.Client.Upload(context.Background(), data, whatsmeow.MediaLinkThumbnail)
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if err != nil {
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portal.log.Errorfln("Failed to upload URL preview thumbnail in %s: %v", evt.ID, err)
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