drop.chapril.org-firefoxsend/test/frontend/frontend.test.js

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const FileSender = window.FileSender;
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const FileReceiver = window.FileReceiver;
const FakeFile = window.FakeFile;
const assert = window.assert;
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const server = window.server;
const hexToArray = window.hexToArray;
const arrayToHex = window.arrayToHex;
const sinon = window.sinon;
let file;
let encryptedIV;
let fileHash;
let secretKey;
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let originalBlob;
describe('File Sender', function() {
before(function() {
server.respondImmediately = true;
server.respondWith(
'POST',
'/upload',
function(request) {
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const reader = new FileReader();
reader.readAsArrayBuffer(request.requestBody.get('data'));
reader.onload = function(event) {
file = this.result;
}
const responseObj = JSON.parse(request.requestHeaders['X-File-Metadata']);
request.respond(
200,
{'Content-Type': 'application/json'},
JSON.stringify({url: 'some url',
id: responseObj.id,
delete: responseObj.delete})
)
}
)
})
it('Should get a loading event emission', function() {
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const file = new FakeFile('hello_world.txt', ['This is some data.'])
const fs = new FileSender(file);
let testLoading = true;
fs.on('loading', isStillLoading => {
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assert(!(!testLoading && isStillLoading));
testLoading = isStillLoading;
})
return fs.upload()
.then(info => {
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assert(info);
assert(!testLoading);
})
.catch(err => {
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console.log(err, err.stack);
assert.fail();
});
})
it('Should get a hashing event emission', function() {
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const file = new FakeFile('hello_world.txt', ['This is some data.'])
const fs = new FileSender(file);
let testHashing = true;
fs.on('hashing', isStillHashing => {
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assert(!(!testHashing && isStillHashing));
testHashing = isStillHashing;
})
return fs.upload()
.then(info => {
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assert(info);
assert(!testHashing);
})
.catch(err => {
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console.log(err, err.stack);
assert.fail();
});
})
it('Should get a encrypting event emission', function() {
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const file = new FakeFile('hello_world.txt', ['This is some data.'])
const fs = new FileSender(file);
let testEncrypting = true;
fs.on('encrypting', isStillEncrypting => {
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assert(!(!testEncrypting && isStillEncrypting));
testEncrypting = isStillEncrypting;
})
return fs.upload()
.then(info => {
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assert(info);
assert(!testEncrypting);
})
.catch(err => {
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console.log(err, err.stack);
assert.fail();
});
})
it('Should encrypt a file properly', function(done) {
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const newFile = new FakeFile('hello_world.txt', ['This is some data.'])
const fs = new FileSender(newFile);
fs.upload().then(info => {
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const key = info.secretKey;
secretKey = info.secretKey;
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const IV = info.fileId;
encryptedIV = info.fileId;
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const readRaw = new FileReader;
readRaw.onload = function(event) {
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const rawArray = new Uint8Array(this.result);
originalBlob = rawArray;
window.crypto.subtle.digest('SHA-256', rawArray).then(hash => {
fileHash = hash;
window.crypto.subtle.importKey(
'jwk',
{
kty: 'oct',
k: key,
alg: 'A128GCM',
ext: true,
},
{
name: 'AES-GCM'
},
true,
['encrypt', 'decrypt']
)
.then(cryptoKey => {
window.crypto.subtle.encrypt(
{
name: 'AES-GCM',
iv: hexToArray(IV),
additionalData: hash,
tagLength: 128
},
cryptoKey,
rawArray
)
.then(encrypted => {
assert(new Uint8Array(encrypted).toString() ===
new Uint8Array(file).toString());
done();
})
})
})
}
readRaw.readAsArrayBuffer(newFile);
})
})
});
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describe('File Receiver', function() {
class FakeXHR {
constructor() {
this.response = file;
this.status = 200;
}
static setup() {
FakeXHR.prototype.open = sinon.spy();
FakeXHR.prototype.send = function () {
this.onload();
}
FakeXHR.prototype.originalXHR = window.XMLHttpRequest;
FakeXHR.prototype.getResponseHeader = function () {
return JSON.stringify({
aad: arrayToHex(new Uint8Array(fileHash)),
filename: 'hello_world.txt',
id: encryptedIV
})
}
window.XMLHttpRequest = FakeXHR;
}
static restore() {
// originalXHR is a sinon FakeXMLHttpRequest, since
// fakeServer.create() is called in frontend.bundle.js
window.XMLHttpRequest.prototype.originalXHR.restore();
}
}
const cb = function(done) {
if (file === undefined ||
encryptedIV === undefined ||
fileHash === undefined ||
secretKey === undefined) {
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assert.fail('Please run file sending tests before trying to receive the files.');
done();
}
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FakeXHR.setup();
done();
}
before(cb)
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after(function() {
FakeXHR.restore();
})
it('Should decrypt properly', function() {
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const fr = new FileReceiver();
location.hash = secretKey;
return fr.download().then(([decrypted, name]) => {
assert(name);
assert(new Uint8Array(decrypted).toString() ===
new Uint8Array(originalBlob).toString())
}).catch(err => {
console.log(err, err.stack);
assert.fail();
})
})
it('Should emit decrypting events', function() {
const fr = new FileReceiver();
location.hash = secretKey;
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let testDecrypting = true;
fr.on('decrypting', isStillDecrypting => {
assert(!(!testDecrypting && isStillDecrypting));
testDecrypting = isStillDecrypting;
});
fr.on('safe', isSafe => {
assert(isSafe);
})
return fr.download().then(([decrypted, name]) => {
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assert(decrypted);
assert(name);
assert(!testDecrypting);
}).catch(err => {
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console.log(err, err.stack);
assert.fail();
})
})
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it('Should emit hashing events', function() {
const fr = new FileReceiver();
location.hash = secretKey;
let testHashing = true;
fr.on('hashing', isStillHashing => {
assert(!(!testHashing && isStillHashing));
testHashing = isStillHashing;
});
fr.on('safe', isSafe => {
assert(isSafe);
})
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return fr.download().then(([decrypted, name]) => {
assert(decrypted);
assert(name);
assert(!testHashing);
}).catch(err => {
assert.fail();
})
})
it('Should catch fraudulent checksums', function(done) {
// Use the secret key and file hash of the previous file to encrypt,
// which has a different hash than this one (different strings).
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const newFile = new FakeFile('hello_world.txt',
['This is some data, with a changed hash.'])
const readRaw = new FileReader();
readRaw.onload = function(event) {
const plaintext = new Uint8Array(this.result);
window.crypto.subtle.importKey(
'jwk',
{
kty: 'oct',
k: secretKey,
alg: 'A128GCM',
ext: true
},
{
name: 'AES-GCM'
},
true,
['encrypt', 'decrypt']
)
.then(key => {
// The file hash used here is the hash of the fake
// file from the previous test; it's a phony checksum.
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return window.crypto.subtle.encrypt(
{
name: 'AES-GCM',
iv: hexToArray(encryptedIV),
additionalData: fileHash,
tagLength: 128
},
key,
plaintext
)
})
.then(encrypted => {
file = encrypted;
const fr = new FileReceiver();
location.hash = secretKey;
fr.on('unsafe', isUnsafe => {
assert(isUnsafe)
})
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fr.on('safe', () => {
// This event should not be emitted.
assert.fail();
})
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fr.download().then(() => {
assert.fail();
done();
}).catch(err => {
assert(1);
done();
})
})
}
readRaw.readAsArrayBuffer(newFile);
})
it('Should not decrypt with an incorrect checksum', function() {
FakeXHR.prototype.getResponseHeader = function () {
return JSON.stringify({
aad: 'some_bad_hashz',
filename: 'hello_world.txt',
id: encryptedIV
})
}
const fr = new FileReceiver();
location.hash = secretKey;
return fr.download().then(([decrypted, name]) => {
assert(decrypted);
assert(name);
assert.fail();
}).catch(err => {
assert(1);
})
})
})