50 lines
1.4 KiB
TypeScript
50 lines
1.4 KiB
TypeScript
// Copyright 2021-2022 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import type { HsmEnclaveClient } from '@signalapp/libsignal-client';
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import { strictAssert } from '../../util/assert';
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import { CDSSocketBase, CDSSocketState } from './CDSSocketBase';
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import type { CDSSocketBaseOptionsType } from './CDSSocketBase';
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export type CDSHSocketOptionsType = Readonly<{
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enclaveClient: HsmEnclaveClient;
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}> &
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CDSSocketBaseOptionsType;
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export class CDSHSocket extends CDSSocketBase<CDSHSocketOptionsType> {
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public override async handshake(): Promise<void> {
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strictAssert(
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this.state === CDSSocketState.Open,
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'CDSH handshake called twice'
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);
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this.state = CDSSocketState.Handshake;
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// Handshake
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this.socket.sendBytes(this.options.enclaveClient.initialRequest());
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const { done, value: message } = await this.socketIterator.next();
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strictAssert(!done, 'Expected CDSH handshake response');
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this.options.enclaveClient.completeHandshake(message);
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this.state = CDSSocketState.Established;
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}
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protected override async sendRequest(
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version: number,
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request: Buffer
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): Promise<void> {
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this.socket.sendBytes(
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this.options.enclaveClient.establishedSend(
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Buffer.concat([Buffer.from([version]), request])
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)
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);
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}
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protected override async decryptResponse(
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ciphertext: Buffer
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): Promise<Buffer> {
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return this.options.enclaveClient.establishedRecv(ciphertext);
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}
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}
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