44 lines
953 B
TypeScript
44 lines
953 B
TypeScript
// Copyright 2022 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { createReadStream } from 'fs';
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import { pipeline } from 'stream/promises';
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import { createHash } from 'crypto';
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import * as Errors from '../types/errors';
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export type CheckIntegrityResultType = Readonly<
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| {
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ok: true;
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error?: void;
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}
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| {
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ok: false;
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error: string;
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}
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>;
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export async function checkIntegrity(
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fileName: string,
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sha512: string
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): Promise<CheckIntegrityResultType> {
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try {
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const hash = createHash('sha512');
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await pipeline(createReadStream(fileName), hash);
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const actualSHA512 = hash.digest('base64');
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if (sha512 === actualSHA512) {
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return { ok: true };
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}
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return {
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ok: false,
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error: `Integrity check failure: expected ${sha512}, got ${actualSHA512}`,
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};
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} catch (error) {
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return {
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ok: false,
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error: Errors.toLogFormat(error),
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};
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}
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}
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