This repository has been archived by the owner on Jun 12, 2022. It is now read-only.
-
-
Notifications
You must be signed in to change notification settings - Fork 27
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat(integrity): full Subresource Integrity support (#10)
Fixes: #7
- Loading branch information
Showing
5 changed files
with
171 additions
and
20 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,8 +1,128 @@ | ||
| 'use strict' | ||
|
|
||
| const Buffer = require('safe-buffer').Buffer | ||
|
|
||
| const ssri = require('ssri') | ||
| const test = require('tap').test | ||
| const tnock = require('./util/tnock') | ||
|
|
||
| const CACHE = require('./util/test-dir')(__filename) | ||
| const CONTENT = Buffer.from('hello, world!', 'utf8') | ||
| const INTEGRITY = ssri.fromData(CONTENT) | ||
| const HOST = 'https://make-fetch-happen-safely.npm' | ||
|
|
||
| const fetch = require('..').defaults({retry: false}) | ||
|
|
||
| test('basic integrity verification', t => { | ||
| const srv = tnock(t, HOST) | ||
| srv.get('/wowsosafe').reply(200, CONTENT) | ||
| srv.get('/wowsobad').reply(200, Buffer.from('pwnd')) | ||
| const safetch = fetch.defaults({ | ||
| integrity: INTEGRITY | ||
| }) | ||
| return safetch(`${HOST}/wowsosafe`).then(res => { | ||
| return res.buffer() | ||
| }).then(buf => { | ||
| t.deepEqual(buf, CONTENT, 'good content passed scrutiny 👍🏼') | ||
| return safetch(`${HOST}/wowsobad`).then(res => { | ||
| return res.buffer() | ||
| }).then(buf => { | ||
| throw new Error(`bad data: ${buf.toString('utf8')}`) | ||
| }).catch(err => { | ||
| t.equal(err.code, 'EBADCHECKSUM', 'content failed checksum!') | ||
| }) | ||
| }) | ||
| }) | ||
|
|
||
| test('picks the "best" algorithm', t => { | ||
| const integrity = ssri.fromData(CONTENT, { | ||
| algorithms: ['md5', 'sha384', 'sha1', 'sha256'] | ||
| }) | ||
| integrity['md5'][0].digest = 'badc0ffee' | ||
| integrity['sha1'][0].digest = 'badc0ffee' | ||
| const safetch = fetch.defaults({integrity}) | ||
| const srv = tnock(t, HOST) | ||
| srv.get('/good').times(3).reply(200, CONTENT) | ||
| srv.get('/bad').reply(200, 'pwnt') | ||
| return safetch(`${HOST}/good`).then(res => res.buffer()).then(buf => { | ||
| t.deepEqual(buf, CONTENT, 'data passed integrity check') | ||
| return safetch(`${HOST}/bad`).then(res => { | ||
| return res.buffer() | ||
| }).then(buf => { | ||
| throw new Error(`bad data: ${buf.toString('utf8')}`) | ||
| }).catch(err => { | ||
| t.equal(err.code, 'EBADCHECKSUM', 'content validated with either sha256 or sha384 (likely the latter)') | ||
| }) | ||
| }).then(() => { | ||
| // invalidate sha384. sha256 is still valid, in theory | ||
| integrity['sha384'][0].digest = 'pwnt' | ||
| return safetch(`${HOST}/good`).then(res => { | ||
| return res.buffer() | ||
| }).then(buf => { | ||
| throw new Error(`bad data: ${buf.toString('utf8')}`) | ||
| }).catch(err => { | ||
| t.equal(err.code, 'EBADCHECKSUM', 'strongest algorithm (sha384) treated as authoritative -- sha256 not used') | ||
| }) | ||
| }).then(() => { | ||
| // remove bad sha384 altogether. sha256 remains valid | ||
| delete integrity['sha384'] | ||
| return safetch(`${HOST}/good`).then(res => res.buffer()) | ||
| }).then(buf => { | ||
| t.deepEqual(buf, CONTENT, 'data passed integrity check with sha256') | ||
| }) | ||
| }) | ||
|
|
||
| test('supports multiple hashes per algorithm', t => { | ||
| const ALTCONTENT = Buffer.from('alt-content is like content but not really') | ||
| const integrity = ssri.fromData(CONTENT, { | ||
| algorithms: ['md5', 'sha384', 'sha1', 'sha256'] | ||
| }).concat(ssri.fromData(ALTCONTENT, { | ||
| algorithms: ['sha384'] | ||
| })) | ||
| const safetch = fetch.defaults({integrity}) | ||
| const srv = tnock(t, HOST) | ||
| srv.get('/main').reply(200, CONTENT) | ||
| srv.get('/alt').reply(200, ALTCONTENT) | ||
| srv.get('/bad').reply(200, 'nope') | ||
| return safetch(`${HOST}/main`).then(res => res.buffer()).then(buf => { | ||
| t.deepEqual(buf, CONTENT, 'main content validated against sha384') | ||
| return safetch(`${HOST}/alt`).then(res => res.buffer()) | ||
| }).then(buf => { | ||
| t.deepEqual(buf, ALTCONTENT, 'alt content validated against sha384') | ||
| return safetch(`${HOST}/bad`).then(res => res.buffer()).then(buf => { | ||
| throw new Error(`bad data: ${buf.toString('utf8')}`) | ||
| }).catch(err => { | ||
| t.equal(err.code, 'EBADCHECKSUM', 'only the two valid contents pass') | ||
| }) | ||
| }) | ||
| }) | ||
|
|
||
| test('basic integrity verification') | ||
| test('picks the "best" algorithm') | ||
| test('fails with EBADCHECKSUM if integrity fails') | ||
| test('checks integrity on cache fetch too') | ||
| test('checks integrity on cache fetch too', t => { | ||
| const srv = tnock(t, HOST) | ||
| srv.get('/test').reply(200, CONTENT) | ||
| const safetch = fetch.defaults({ | ||
| cacheManager: CACHE, | ||
| integrity: INTEGRITY, | ||
| cache: 'must-revalidate' | ||
| }) | ||
| return safetch(`${HOST}/test`).then(res => res.buffer()).then(buf => { | ||
| t.deepEqual(buf, CONTENT, 'good content passed scrutiny 👍🏼') | ||
| srv.get('/test').reply(200, 'nope') | ||
| return safetch(`${HOST}/test`).then(res => res.buffer()).then(buf => { | ||
| throw new Error(`bad data: ${buf.toString('utf8')}`) | ||
| }).catch(err => { | ||
| t.equal(err.code, 'EBADCHECKSUM', 'cached content failed checksum!') | ||
| }) | ||
| }).then(() => { | ||
| srv.get('/test').reply(200, 'nope') | ||
| return safetch(`${HOST}/test`, { | ||
| // try to use local cached version | ||
| cache: 'force-cache', | ||
| integrity: {algorithm: 'sha512', digest: 'doesnotmatch'} | ||
| }).then(res => res.buffer()).then(buf => { | ||
| throw new Error(`bad data: ${buf.toString('utf8')}`) | ||
| }).catch(err => { | ||
| t.equal(err.code, 'EBADCHECKSUM', 'cached content failed checksum!') | ||
| }) | ||
| }) | ||
| }) |