74 lines
2.1 KiB
TypeScript
74 lines
2.1 KiB
TypeScript
/*
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Copyright 2023 New Vector Ltd
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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import { BaseKeyProvider, createKeyMaterialFromBuffer } from "livekit-client";
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import { logger } from "matrix-js-sdk/src/logger";
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import {
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MatrixRTCSession,
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MatrixRTCSessionEvent,
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} from "matrix-js-sdk/src/matrixrtc/MatrixRTCSession";
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export class MatrixKeyProvider extends BaseKeyProvider {
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private rtcSession?: MatrixRTCSession;
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public constructor() {
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super({ ratchetWindowSize: 0 });
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}
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public setRTCSession(rtcSession: MatrixRTCSession): void {
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if (this.rtcSession) {
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this.rtcSession.off(
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MatrixRTCSessionEvent.EncryptionKeyChanged,
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this.onEncryptionKeyChanged,
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);
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}
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this.rtcSession = rtcSession;
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this.rtcSession.on(
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MatrixRTCSessionEvent.EncryptionKeyChanged,
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this.onEncryptionKeyChanged,
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);
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// The new session could be aware of keys of which the old session wasn't,
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// so emit a key changed event.
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for (const [
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participant,
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encryptionKeys,
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] of this.rtcSession.getEncryptionKeys()) {
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for (const [index, encryptionKey] of encryptionKeys.entries()) {
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this.onEncryptionKeyChanged(encryptionKey, index, participant);
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}
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}
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}
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private onEncryptionKeyChanged = async (
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encryptionKey: Uint8Array,
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encryptionKeyIndex: number,
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participantId: string,
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): Promise<void> => {
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this.onSetEncryptionKey(
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await createKeyMaterialFromBuffer(encryptionKey),
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participantId,
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encryptionKeyIndex,
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);
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logger.debug(
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`Sent new key to livekit room=${this.rtcSession?.room.roomId} participantId=${participantId} encryptionKeyIndex=${encryptionKeyIndex}`,
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);
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};
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}
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