mirror of
https://github.com/stoatchat/livekit-protocol.git
synced 2026-07-01 22:04:52 -04:00
Mathew Kamkar
86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
// Copyright 2023 LiveKit, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package webhook
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import (
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"crypto/sha256"
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"crypto/subtle"
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"encoding/base64"
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"io"
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"net/http"
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"google.golang.org/protobuf/encoding/protojson"
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"github.com/livekit/protocol/auth"
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"github.com/livekit/protocol/livekit"
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)
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// Receive reads and verifies incoming webhook is signed with key/secret pair
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// closes body after reading
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func Receive(r *http.Request, provider auth.KeyProvider) ([]byte, error) {
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defer r.Body.Close()
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data, err := io.ReadAll(r.Body)
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if err != nil {
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return nil, err
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}
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authToken := r.Header.Get(authHeader)
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if authToken == "" {
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return nil, ErrNoAuthHeader
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}
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v, err := auth.ParseAPIToken(authToken)
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if err != nil {
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return nil, err
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}
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secret := provider.GetSecret(v.APIKey())
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if secret == "" {
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return nil, ErrSecretNotFound
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}
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claims, err := v.Verify(secret)
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if err != nil {
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return nil, err
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}
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// verify checksum
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sha := sha256.Sum256(data)
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hash := base64.StdEncoding.EncodeToString(sha[:])
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if subtle.ConstantTimeCompare([]byte(claims.Sha256), []byte(hash)) != 1 {
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return nil, ErrInvalidChecksum
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}
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return data, nil
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}
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// ReceiveWebhookEvent reads and verifies incoming webhook, and returns a parsed WebhookEvent
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func ReceiveWebhookEvent(r *http.Request, provider auth.KeyProvider) (*livekit.WebhookEvent, error) {
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data, err := Receive(r, provider)
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if err != nil {
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return nil, err
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}
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unmarshalOpts := protojson.UnmarshalOptions{
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DiscardUnknown: true,
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AllowPartial: true,
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}
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event := livekit.WebhookEvent{}
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if err = unmarshalOpts.Unmarshal(data, &event); err != nil {
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return nil, err
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}
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return &event, nil
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}
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