mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-09-20 02:12:29 +00:00
108 lines
2.8 KiB
Go
108 lines
2.8 KiB
Go
// Copyright (c) 2021 Tulir Asokan
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package whatsmeow
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import (
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"bytes"
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"context"
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"crypto/hmac"
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"crypto/rand"
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"crypto/sha256"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"net/http"
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"net/url"
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"go.mau.fi/whatsmeow/socket"
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"go.mau.fi/whatsmeow/util/cbcutil"
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)
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// UploadResponse contains the data from the attachment upload, which can be put into a message to send the attachment.
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type UploadResponse struct {
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URL string
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DirectPath string
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MediaKey []byte
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FileEncSHA256 []byte
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FileSHA256 []byte
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FileLength uint64
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}
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// Upload uploads the given attachment to WhatsApp servers.
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func (cli *Client) Upload(ctx context.Context, plaintext []byte, appInfo MediaType) (resp UploadResponse, err error) {
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resp.FileLength = uint64(len(plaintext))
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resp.MediaKey = make([]byte, 32)
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_, err = rand.Read(resp.MediaKey)
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if err != nil {
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return
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}
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plaintextSHA256 := sha256.Sum256(plaintext)
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resp.FileSHA256 = plaintextSHA256[:]
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iv, cipherKey, macKey, _ := getMediaKeys(resp.MediaKey, appInfo)
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var ciphertext []byte
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ciphertext, err = cbcutil.Encrypt(cipherKey, iv, plaintext)
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if err != nil {
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err = fmt.Errorf("failed to encrypt file: %w", err)
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return
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}
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h := hmac.New(sha256.New, macKey)
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h.Write(iv)
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h.Write(ciphertext)
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dataToUpload := append(ciphertext, h.Sum(nil)[:10]...)
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fileEncSHA256 := sha256.Sum256(dataToUpload)
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resp.FileEncSHA256 = fileEncSHA256[:]
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err = cli.refreshMediaConn(false)
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if err != nil {
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err = fmt.Errorf("failed to refresh media connections: %w", err)
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return
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}
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token := base64.URLEncoding.EncodeToString(resp.FileEncSHA256)
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q := url.Values{
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"auth": []string{cli.mediaConn.Auth},
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"token": []string{token},
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}
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mmsType := mediaTypeToMMSType[appInfo]
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uploadURL := url.URL{
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Scheme: "https",
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Host: cli.mediaConn.Hosts[0].Hostname,
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Path: fmt.Sprintf("/mms/%s/%s", mmsType, token),
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RawQuery: q.Encode(),
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}
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var req *http.Request
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req, err = http.NewRequestWithContext(ctx, http.MethodPost, uploadURL.String(), bytes.NewReader(dataToUpload))
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if err != nil {
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err = fmt.Errorf("failed to prepare request: %w", err)
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return
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}
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req.Header.Set("Origin", socket.Origin)
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req.Header.Set("Referer", socket.Origin+"/")
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var httpResp *http.Response
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httpResp, err = http.DefaultClient.Do(req)
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if err != nil {
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err = fmt.Errorf("failed to execute request: %w", err)
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} else if httpResp.StatusCode != http.StatusOK {
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err = fmt.Errorf("upload failed with status code %d", httpResp.StatusCode)
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} else if err = json.NewDecoder(httpResp.Body).Decode(&resp); err != nil {
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err = fmt.Errorf("failed to parse upload response: %w", err)
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}
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if httpResp != nil {
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_ = httpResp.Body.Close()
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}
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return
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}
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