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Merge pull request #106 from mozilla/gcm 

Gcm
This commit is contained in:
Danny Coates 2017-07-10 12:50:18 -07:00 committed by GitHub
parent 125e6ecbdb 6aa79472bf
commit 2031158336
7 changed files with 165 additions and 108 deletions
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65
frontend/src/fileReceiver.js
View File

@ -1,12 +1,9 @@
const EventEmitter = require('events');
const { strToIv } = require('./utils');
const Raven = window.Raven;
const { hexToArray } = require('./utils');
class FileReceiver extends EventEmitter {
constructor() {
super();
this.salt = strToIv(location.pathname.slice(10, -1));
}
download() {
@ -34,11 +31,12 @@ class FileReceiver extends EventEmitter {
const blob = new Blob([this.response]);
const fileReader = new FileReader();
fileReader.onload = function() {
const meta = JSON.parse(xhr.getResponseHeader('X-File-Metadata'));
resolve({
data: this.result,
fname: xhr
.getResponseHeader('Content-Disposition')
.match(/=(.+)/)[1]
aad: meta.aad,
filename: meta.filename,
iv: meta.id
});
};
@ -54,36 +52,53 @@ class FileReceiver extends EventEmitter {
{
kty: 'oct',
k: location.hash.slice(1),
alg: 'A128CBC',
alg: 'A128GCM',
ext: true
},
{
name: 'AES-CBC'
name: 'AES-GCM'
},
true,
['encrypt', 'decrypt']
)
])
.then(([fdata, key]) => {
const salt = this.salt;
]).then(([fdata, key]) => {
return Promise.all([
window.crypto.subtle.decrypt(
{
name: 'AES-GCM',
iv: hexToArray(fdata.iv),
additionalData: hexToArray(fdata.aad)
},
key,
fdata.data
),
new Promise((resolve, reject) => {
resolve(fdata.filename);
}),
new Promise((resolve, reject) => {
resolve(hexToArray(fdata.aad));
})
]);
}).then(([decrypted, fname, proposedHash]) => {
return window.crypto.subtle.digest('SHA-256', decrypted).then(calculatedHash => {
const integrity = new Uint8Array(calculatedHash).toString() === proposedHash.toString();
if (!integrity) {
return new Promise((resolve, reject) => {
console.log('This file has been tampered with.')
reject();
})
}
return Promise.all([
window.crypto.subtle.decrypt(
{
name: 'AES-CBC',
iv: salt
},
key,
fdata.data
),
new Promise((resolve, reject) => {
resolve(fdata.fname);
resolve(decrypted);
}),
new Promise((resolve, reject) => {
resolve(fname);
})
]);
})
.catch(err => {
Raven.captureException(err);
return Promise.reject(err);
});
})
}
}

70
frontend/src/fileSender.js
View File

@ -1,5 +1,5 @@
const EventEmitter = require('events');
const { ivToStr } = require('./utils');
const { arrayToHex } = require('./utils');
const Raven = window.Raven;
@ -7,7 +7,7 @@ class FileSender extends EventEmitter {
constructor(file) {
super();
this.file = file;
this.iv = window.crypto.getRandomValues(new Uint8Array(16));
this.iv = window.crypto.getRandomValues(new Uint8Array(12));
}
static delete(fileId, token) {
@ -37,46 +37,56 @@ class FileSender extends EventEmitter {
upload() {
return Promise.all([
window.crypto.subtle.generateKey(
{
name: 'AES-CBC',
length: 128
},
true,
['encrypt', 'decrypt']
),
window.crypto.subtle
.generateKey(
{
name: 'AES-GCM',
length: 128
},
true,
['encrypt', 'decrypt']
)
.catch(err =>
console.log('There was an error generating a crypto key')
),
new Promise((resolve, reject) => {
const reader = new FileReader();
reader.readAsArrayBuffer(this.file);
reader.onload = function(event) {
resolve(new Uint8Array(this.result));
const plaintext = new Uint8Array(this.result);
window.crypto.subtle.digest('SHA-256', plaintext).then(hash => {
resolve({plaintext: plaintext, hash: new Uint8Array(hash)});
})
};
reader.onerror = function(err) {
reject(err);
};
})
])
.then(([secretKey, plaintext]) => {
.then(([secretKey, file]) => {
return Promise.all([
window.crypto.subtle.encrypt(
{
name: 'AES-CBC',
iv: this.iv
},
secretKey,
plaintext
),
window.crypto.subtle.exportKey('jwk', secretKey)
window.crypto.subtle
.encrypt(
{
name: 'AES-GCM',
iv: this.iv,
additionalData: file.hash,
tagLength: 128
},
secretKey,
file.plaintext
),
window.crypto.subtle.exportKey('jwk', secretKey),
new Promise((resolve, reject) => { resolve(file.hash) })
]);
})
.then(([encrypted, keydata]) => {
.then(([encrypted, keydata, hash]) => {
return new Promise((resolve, reject) => {
const file = this.file;
const fileId = ivToStr(this.iv);
const fileId = arrayToHex(this.iv);
const dataView = new DataView(encrypted);
const blob = new Blob([dataView], { type: file.type });
const fd = new FormData();
fd.append('fname', file.name);
fd.append('data', blob, file.name);
const xhr = new XMLHttpRequest();
@ -94,14 +104,22 @@ class FileSender extends EventEmitter {
const responseObj = JSON.parse(xhr.responseText);
resolve({
url: responseObj.url,
fileId: fileId,
fileId: responseObj.id,
secretKey: keydata.k,
deleteToken: responseObj.uuid
});
}
};
xhr.open('post', '/upload/' + fileId, true);
xhr.open('post', '/upload', true);
xhr.setRequestHeader(
'X-File-Metadata',
JSON.stringify({
aad: arrayToHex(hash),
id: fileId,
filename: file.name
})
);
xhr.send(fd);
});
})

10
frontend/src/utils.js
View File

@ -1,4 +1,4 @@
function ivToStr(iv) {
function arrayToHex(iv) {
let hexStr = '';
for (const i in iv) {
if (iv[i] < 16) {
@ -11,8 +11,8 @@ function ivToStr(iv) {
return hexStr;
}
function strToIv(str) {
const iv = new Uint8Array(16);
function hexToArray(str) {
const iv = new Uint8Array(str.length / 2);
for (let i = 0; i < str.length; i += 2) {
iv[i / 2] = parseInt(str.charAt(i) + str.charAt(i + 1), 16);
}
@ -33,7 +33,7 @@ function notify(str) {
}
module.exports = {
ivToStr,
strToIv,
arrayToHex,
hexToArray,
notify
};

41
server/portal_server.js
View File

@ -8,6 +8,7 @@ const bytes = require('bytes');
const conf = require('./config.js');
const storage = require('./storage.js');
const Raven = require('raven');
const crypto = require('crypto');
if (conf.sentry_dsn) {
Raven.config(conf.sentry_dsn).install();
@ -79,13 +80,14 @@ app.get('/assets/download/:id', (req, res) => {
}
storage
.filename(id)
.then(reply => {
.metadata(id)
.then(meta => {
storage.length(id).then(contentLength => {
res.writeHead(200, {
'Content-Disposition': 'attachment; filename=' + reply,
'Content-Disposition': 'attachment; filename=' + meta.filename,
'Content-Type': 'application/octet-stream',
'Content-Length': contentLength
'Content-Length': contentLength,
'X-File-Metadata': JSON.stringify(meta)
});
const file_stream = storage.get(id);
@ -135,21 +137,24 @@ app.post('/delete/:id', (req, res) => {
.catch(err => res.sendStatus(404));
});
app.post('/upload/:id', (req, res, next) => {
if (!validateID(req.params.id)) {
res.sendStatus(404);
return;
}
app.post('/upload', (req, res, next) => {
const newId = crypto.randomBytes(5).toString('hex');
const meta = JSON.parse(req.header('X-File-Metadata'));
meta.delete = crypto.randomBytes(10).toString('hex');
log.info('meta', meta);
req.pipe(req.busboy);
req.busboy.on('file', (fieldname, file, filename) => {
log.info('Uploading:', req.params.id);
log.info('Uploading:', newId);
const protocol = conf.env === 'production' ? 'https' : req.protocol;
const url = `${protocol}://${req.get('host')}/download/${req.params.id}/`;
storage.set(req.params.id, file, filename, url).then(linkAndID => {
res.json(linkAndID);
storage.set(newId, file, filename, meta).then(() => {
const protocol = conf.env === 'production' ? 'https' : req.protocol;
const url = `${protocol}://${req.get('host')}/download/${newId}/`;
res.json({
url,
delete: meta.delete,
id: newId
});
});
});
});
@ -171,5 +176,5 @@ app.listen(conf.listen_port, () => {
});
const validateID = route_id => {
return route_id.match(/^[0-9a-fA-F]{32}$/) !== null;
};
return route_id.match(/^[0-9a-fA-F]{10}$/) !== null;
};

73
server/storage.js
View File

@ -4,7 +4,6 @@ const s3 = new AWS.S3();
const conf = require('./config.js');
const fs = require('fs');
const path = require('path');
const crypto = require('crypto');
const mozlog = require('./log.js');
@ -27,9 +26,12 @@ if (conf.s3_bucket) {
length: awsLength,
get: awsGet,
set: awsSet,
aad: aad,
setField: setField,
delete: awsDelete,
forceDelete: awsForceDelete,
ping: awsPing
ping: awsPing,
metadata
};
} else {
module.exports = {
@ -38,12 +40,27 @@ if (conf.s3_bucket) {
length: localLength,
get: localGet,
set: localSet,
aad: aad,
setField: setField,
delete: localDelete,
forceDelete: localForceDelete,
ping: localPing
ping: localPing,
metadata
};
}
function metadata(id) {
return new Promise((resolve, reject) => {
redis_client.hgetall(id, (err, reply) => {
if (!err) {
resolve(reply);
} else {
reject(err);
}
});
});
}
function filename(id) {
return new Promise((resolve, reject) => {
redis_client.hget(id, 'filename', (err, reply) => {
@ -68,6 +85,22 @@ function exists(id) {
});
}
function setField(id, key, value) {
redis_client.hset(id, key, value);
}
function aad(id) {
return new Promise((resolve, reject) => {
redis_client.hget(id, 'aad', (err, reply) => {
if (!err) {
resolve(reply);
} else {
reject();
}
});
});
}
function localLength(id) {
return new Promise((resolve, reject) => {
try {
@ -82,24 +115,19 @@ function localGet(id) {
return fs.createReadStream(path.join(__dirname, '../static', id));
}
function localSet(id, file, filename, url) {
function localSet(newId, file, filename, meta) {
return new Promise((resolve, reject) => {
const fstream = fs.createWriteStream(path.join(__dirname, '../static', id));
const fstream = fs.createWriteStream(path.join(__dirname, '../static', newId));
file.pipe(fstream);
fstream.on('close', () => {
const uuid = crypto.randomBytes(10).toString('hex');
redis_client.hmset([id, 'filename', filename, 'delete', uuid]);
redis_client.expire(id, 86400000);
log.info('localSet:', 'Upload Finished of ' + id);
resolve({
uuid: uuid,
url: url
});
redis_client.hmset(newId, meta);
redis_client.expire(newId, 86400000);
log.info('localSet:', 'Upload Finished of ' + newId);
resolve(meta.delete);
});
fstream.on('error', () => {
log.error('localSet:', 'Failed upload of ' + id);
log.error('localSet:', 'Failed upload of ' + newId);
reject();
});
});
@ -163,10 +191,10 @@ function awsGet(id) {
}
}
function awsSet(id, file, filename, url) {
function awsSet(newId, file, filename, meta) {
const params = {
Bucket: conf.s3_bucket,
Key: id,
Key: newId,
Body: file
};
@ -176,16 +204,11 @@ function awsSet(id, file, filename, url) {
log.info('awsUploadError:', err.stack); // an error occurred
reject();
} else {
const uuid = crypto.randomBytes(10).toString('hex');
redis_client.hmset(newId, meta);
redis_client.hmset([id, 'filename', filename, 'delete', uuid]);
redis_client.expire(id, 86400000);
redis_client.expire(newId, 86400000);
log.info('awsUploadFinish', 'Upload Finished of ' + filename);
resolve({
uuid: uuid,
url: url
});
resolve(meta.delete);
}
});
});

7
test/aws.storage.test.js
View File

@ -112,11 +112,8 @@ describe('Testing Set using aws', function() {
sinon.stub(crypto, 'randomBytes').returns(buf);
s3Stub.upload.callsArgWith(1, null, {});
return storage
.set('123', {}, 'Filename.moz', 'url.com')
.then(reply => {
assert.equal(reply.uuid, buf.toString('hex'));
assert.equal(reply.url, 'url.com');
assert.notEqual(reply.uuid, null);
.set('123', {}, 'Filename.moz', {})
.then(() => {
assert(expire.calledOnce);
assert(expire.calledWith('123', 86400000));
})

7
test/local.storage.test.js
View File

@ -122,10 +122,9 @@ describe('Testing Set to local filesystem', function() {
fsStub.createWriteStream.returns({ on: stub });
return storage
.set('test', { pipe: sinon.stub() }, 'Filename.moz', 'moz.la')
.then(reply => {
assert(reply.uuid);
assert.equal(reply.url, 'moz.la');
.set('test', { pipe: sinon.stub() }, 'Filename.moz', {})
.then(() => {
assert(1);
})
.catch(err => assert.fail());
});