103 lines
2.9 KiB
TypeScript
103 lines
2.9 KiB
TypeScript
// Copyright 2024 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { Aci } from '@signalapp/libsignal-client';
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import {
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groupSendEndorsementsDataSchema,
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type GroupSendEndorsementsData,
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} from '../types/GroupSendEndorsements';
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import { strictAssert } from './assert';
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import {
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GroupSecretParams,
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GroupSendEndorsementsResponse,
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ServerPublicParams,
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} from './zkgroup';
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import { fromAciObject } from '../types/ServiceId';
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import * as log from '../logging/log';
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import type { GroupV2MemberType } from '../model-types';
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export function decodeGroupSendEndorsementResponse({
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groupId,
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groupSendEndorsementResponse,
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groupSecretParamsBase64,
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groupMembersV2,
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}: {
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groupId: string;
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groupSendEndorsementResponse: Uint8Array;
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groupSecretParamsBase64: string;
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groupMembersV2: ReadonlyArray<GroupV2MemberType>;
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}): GroupSendEndorsementsData {
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const idForLogging = `groupV2(${groupId})`;
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strictAssert(
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groupSendEndorsementResponse != null,
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'Missing groupSendEndorsementResponse'
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);
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strictAssert(
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groupSendEndorsementResponse.byteLength > 0,
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'Received empty groupSendEndorsementResponse'
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);
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const response = new GroupSendEndorsementsResponse(
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Buffer.from(groupSendEndorsementResponse)
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);
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const expiration = response.getExpiration().getTime();
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const localUser = Aci.parseFromServiceIdString(
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window.textsecure.storage.user.getCheckedAci()
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);
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const groupSecretParams = new GroupSecretParams(
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Buffer.from(groupSecretParamsBase64, 'base64')
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);
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const serverPublicParams = new ServerPublicParams(
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Buffer.from(window.getServerPublicParams(), 'base64')
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);
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const groupMembers = groupMembersV2.map(member => {
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return Aci.parseFromServiceIdString(member.aci);
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});
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const receivedEndorsements = response.receiveWithServiceIds(
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groupMembers,
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localUser,
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groupSecretParams,
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serverPublicParams
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);
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const { combinedEndorsement, endorsements } = receivedEndorsements;
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strictAssert(
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endorsements.length === groupMembers.length,
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`Member endorsements must match input array (expected: ${groupMembers.length}, actual: ${endorsements.length})`
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);
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log.info(
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`decodeGroupSendEndorsementResponse: Received endorsements (group: ${idForLogging}, expiration: ${expiration}, members: ${groupMembers.length})`
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);
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const groupEndorsementData: GroupSendEndorsementsData = {
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combinedEndorsement: {
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groupId,
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expiration,
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endorsement: combinedEndorsement.getContents(),
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},
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memberEndorsements: groupMembers.map((groupMember, index) => {
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const endorsement = endorsements.at(index);
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strictAssert(
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endorsement != null,
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`Missing endorsement at index ${index}`
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);
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return {
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groupId,
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memberAci: fromAciObject(groupMember),
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expiration,
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endorsement: endorsement.getContents(),
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};
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}),
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};
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return groupSendEndorsementsDataSchema.parse(groupEndorsementData);
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}
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