73 lines
1.9 KiB
TypeScript
73 lines
1.9 KiB
TypeScript
// Copyright 2020 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { PublicKey, Fingerprint } from '@signalapp/signal-client';
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import { ConversationType } from '../state/ducks/conversations';
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export async function generateSecurityNumber(
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ourNumber: string,
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ourKey: ArrayBuffer,
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theirNumber: string,
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theirKey: ArrayBuffer
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): Promise<string> {
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const ourNumberBuf = Buffer.from(ourNumber);
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const ourKeyObj = PublicKey.deserialize(Buffer.from(ourKey));
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const theirNumberBuf = Buffer.from(theirNumber);
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const theirKeyObj = PublicKey.deserialize(Buffer.from(theirKey));
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const fingerprint = Fingerprint.new(
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5200,
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2,
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ourNumberBuf,
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ourKeyObj,
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theirNumberBuf,
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theirKeyObj
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);
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const fingerprintString = fingerprint.displayableFingerprint().toString();
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return Promise.resolve(fingerprintString);
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}
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export async function generateSecurityNumberBlock(
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contact: ConversationType
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): Promise<Array<string>> {
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const ourNumber = window.textsecure.storage.user.getNumber();
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const ourUuid = window.textsecure.storage.user.getUuid();
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const us = window.textsecure.storage.protocol.getIdentityRecord(
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ourUuid || ourNumber
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);
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const ourKey = us ? us.publicKey : null;
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const them = window.textsecure.storage.protocol.getIdentityRecord(contact.id);
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const theirKey = them ? them.publicKey : null;
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if (!ourKey) {
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throw new Error('Could not load our key');
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}
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if (!theirKey) {
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throw new Error('Could not load their key');
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}
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if (!contact.e164) {
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window.log.error(
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'generateSecurityNumberBlock: Attempted to generate security number for contact with no e164'
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);
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return [];
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}
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const securityNumber = await generateSecurityNumber(
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ourNumber,
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ourKey,
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contact.e164,
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theirKey
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);
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const chunks = [];
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for (let i = 0; i < securityNumber.length; i += 5) {
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chunks.push(securityNumber.substring(i, i + 5));
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}
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return chunks;
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}
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