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Bug 1071482 - Make content encrypted via EME inaccessible from JS APIs. r=roc

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This commit is contained in:
Chris Pearce 2014-10-28 13:21:12 +13:00
parent 7b3091e9ac
commit 59e6c47221
8 changed files with 209 additions and 2 deletions
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19
dom/html/HTMLMediaElement.cpp
View File

@ -1792,7 +1792,11 @@ HTMLMediaElement::CaptureStreamInternal(bool aFinishWhenEnded)
if (!window) {
return nullptr;
}
#ifdef MOZ_EME
if (ContainsRestrictedContent()) {
return nullptr;
}
#endif
OutputMediaStream* out = mOutputStreams.AppendElement();
#ifdef DEBUG
// Estimate hints based on the type of the media element
@ -3997,10 +4001,21 @@ HTMLMediaElement::GetMediaKeys() const
return mMediaKeys;
}
bool
HTMLMediaElement::ContainsRestrictedContent()
{
return GetMediaKeys() != nullptr;
}
already_AddRefed<Promise>
HTMLMediaElement::SetMediaKeys(mozilla::dom::MediaKeys* aMediaKeys,
ErrorResult& aRv)
{
if (MozAudioCaptured()) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
nsCOMPtr<nsIGlobalObject> global =
do_QueryInterface(OwnerDoc()->GetInnerWindow());
if (!global) {
@ -4035,6 +4050,8 @@ HTMLMediaElement::SetMediaKeys(mozilla::dom::MediaKeys* aMediaKeys,
if (mDecoder) {
mDecoder->SetCDMProxy(mMediaKeys->GetCDMProxy());
}
// Update the same-origin status.
NotifyDecoderPrincipalChanged();
}
promise->MaybeResolve(JS::UndefinedHandleValue);
return promise.forget();

1
dom/html/HTMLMediaElement.h
View File

@ -550,6 +550,7 @@ public:
// in the URL bar of the browser window.
already_AddRefed<nsIPrincipal> GetTopLevelPrincipal();
bool ContainsRestrictedContent();
#endif // MOZ_EME
bool MozAutoplayEnabled() const

6
dom/media/test/eme.js
View File

@ -150,6 +150,10 @@ function SetupEME(test, token, params)
{
var v = document.createElement("video");
var onSetKeysFail = (params && params.onSetKeysFail)
? params.onSetKeysFail
: bail(token + " Failed to set MediaKeys on <video> element");
v.addEventListener("encrypted", function(ev) {
info(token + " got encrypted event");
MediaKeys.create(KEYSYSTEM_TYPE).then(function(mediaKeys) {
@ -167,7 +171,7 @@ function SetupEME(test, token, params)
session.generateRequest(ev.initDataType, ev.initData).then(function() {
}, bail(token + " Failed to initialise MediaKeySession"));
}, bail(token + " Failed to set MediaKeys on <video> element"));
}, onSetKeysFail);
});
return v;

4
dom/media/test/mochitest.ini
View File

@ -361,8 +361,12 @@ skip-if = (toolkit == 'android' && processor == 'x86') #x86 only bug 914439
[test_defaultMuted.html]
[test_delay_load.html]
skip-if = buildapp == 'b2g' && toolkit != 'gonk' # bug 1082984
[test_eme_canvas_blocked.html]
skip-if = buildapp == 'b2g' || toolkit == 'android' || e10s # bug 1043403, bug 1057908
[test_eme_playback.html]
skip-if = buildapp == 'b2g' || toolkit == 'android' || e10s # bug 1043403, bug 1057908
[test_eme_stream_capture_blocked.html]
skip-if = buildapp == 'b2g' || toolkit == 'android' || e10s # bug 1043403, bug 1057908
[test_error_in_video_document.html]
skip-if = toolkit == 'android' # bug 608634
[test_error_on_404.html]

67
dom/media/test/test_eme_canvas_blocked.html Normal file
View File

@ -0,0 +1,67 @@
<!DOCTYPE HTML>
<html>
<head>
<title>Test Encrypted Media Extensions</title>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
<script type="text/javascript" src="manifest.js"></script>
<script type="text/javascript" src="eme.js"></script>
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">
var manager = new MediaTestManager;
function startTest(test, token)
{
manager.started(token);
var sessions = [];
var v = SetupEME(test, token);
v.preload = "auto"; // Required due to "canplay" not firing for MSE unless we do this.
v.addEventListener("canplay", function(ev) {
var video = ev.target;
var canvas = document.createElement("canvas");
canvas.width = video.videoWidth;
canvas.height = video.videoHeight;
document.body.appendChild(canvas);
var ctx = canvas.getContext("2d");
var threwError = false;
try {
ctx.drawImage(video, 0, 0);
} catch (ex) {
threwError = true;
}
ok(threwError, token + " - Should throw an error when trying to draw EME video to canvas.");
manager.finished(token);
});
v.addEventListener("error", bail(token + " got error event"));
LoadTest(test, v);
}
function beginTest() {
manager.runTests(gEMETests, startTest);
}
var prefs = [
[ "media.mediasource.enabled", true ],
[ "media.mediasource.ignore_codecs", true ],
];
if (/Linux/.test(navigator.userAgent) ||
!document.createElement('video').canPlayType("video/mp4")) {
// XXX remove once we have mp4 PlatformDecoderModules on all platforms.
prefs.push([ "media.fragmented-mp4.exposed", true ]);
prefs.push([ "media.fragmented-mp4.use-blank-decoder", true ]);
}
SimpleTest.waitForExplicitFinish();
SpecialPowers.pushPrefEnv({ "set" : prefs }, beginTest);
</script>
</pre>
</body>
</html>

102
dom/media/test/test_eme_stream_capture_blocked.html Normal file
View File

@ -0,0 +1,102 @@
<!DOCTYPE HTML>
<html>
<head>
<title>Test Encrypted Media Extensions</title>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
<script type="text/javascript" src="manifest.js"></script>
<script type="text/javascript" src="eme.js"></script>
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">
var manager = new MediaTestManager;
function startTest(test, token)
{
// Three cases:
// 1. setting MediaKeys on an element captured by MediaElementSource should fail, and
// 2. creating a MediaElementSource on a media element with a MediaKeys should fail, and
// 3. capturing a media element with mozCaptureStream that has a MediaKeys should fail.
// Case 1. setting MediaKeys on an element captured by MediaElementSource should fail.
var case1token = token + "_case1";
var setKeysFailed = function() {
ok(true, case1token + " setMediaKeys failed as expected.");
manager.finished(case1token);
};
var v1 = SetupEME(test, case1token, { onSetKeysFail: setKeysFailed });
var context = new AudioContext();
var node = context.createMediaElementSource(v1);
v1.preload = "auto"; // Required due to "canplay" not firing for MSE unless we do this.
v1.addEventListener("error", bail(case1token + " got error event"));
v1.addEventListener("canplay", function(ev) {
ok(false, case1token + " should never reach canplay, as setMediaKeys should fail");
});
manager.started(case1token);
LoadTest(test, v1);
// Case 2. creating a MediaElementSource on a media element with a MediaKeys should fail.
var case2token = token + "_case2";
var v2 = SetupEME(test, case2token);
v2.preload = "auto"; // Required due to "canplay" not firing for MSE unless we do this.
v2.addEventListener("error", bail(case2token + " got error event"));
v2.addEventListener("canplay", function(ev) {
ok(true, case2token + " should reach canplay");
var threw = false;
try {
var context = new AudioContext();
var node = context.createMediaElementSource(v2);
} catch (e) {
threw = true;
}
ok(threw, "Should throw an error creating a MediaElementSource on an EME video.");
manager.finished(case2token);
});
manager.started(case2token);
LoadTest(test, v2);
// Case 3. capturing a media element with mozCaptureStream that has a MediaKeys should fail.
var case3token = token + "_case3";
var v3 = SetupEME(test, case3token);
v3.preload = "auto"; // Required due to "canplay" not firing for MSE unless we do this.
v3.addEventListener("error", bail(case3token + " got error event"));
v3.addEventListener("canplay", function(ev) {
ok(true, case3token + " should reach canplay");
var threw = false;
try {
var stream = v3.mozCaptureStreamUntilEnded();
} catch (e) {
threw = true;
}
ok(threw, "Should throw an error calling mozCaptureStreamUntilEnded an EME video.");
manager.finished(case3token);
});
manager.started(case3token);
LoadTest(test, v3);
}
function beginTest() {
manager.runTests(gEMETests, startTest);
}
var prefs = [
[ "media.mediasource.enabled", true ],
[ "media.mediasource.ignore_codecs", true ],
];
if (/Linux/.test(navigator.userAgent) ||
!document.createElement('video').canPlayType("video/mp4")) {
// XXX remove once we have mp4 PlatformDecoderModules on all platforms.
prefs.push([ "media.fragmented-mp4.exposed", true ]);
prefs.push([ "media.fragmented-mp4.use-blank-decoder", true ]);
}
SimpleTest.waitForExplicitFinish();
SpecialPowers.pushPrefEnv({ "set" : prefs }, beginTest);
</script>
</pre>
</body>
</html>

6
dom/media/webaudio/AudioContext.cpp
View File

@ -285,6 +285,12 @@ AudioContext::CreateMediaElementSource(HTMLMediaElement& aMediaElement,
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
#ifdef MOZ_EME
if (aMediaElement.ContainsRestrictedContent()) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
#endif
nsRefPtr<DOMMediaStream> stream = aMediaElement.MozCaptureStream(aRv);
if (aRv.Failed()) {
return nullptr;

6
layout/base/nsLayoutUtils.cpp
View File

@ -6092,6 +6092,12 @@ nsLayoutUtils::SurfaceFromElement(HTMLVideoElement* aElement,
NS_WARN_IF_FALSE((aSurfaceFlags & SFE_PREFER_NO_PREMULTIPLY_ALPHA) == 0, "We can't support non-premultiplied alpha for video!");
#ifdef MOZ_EME
if (aElement->ContainsRestrictedContent()) {
return result;
}
#endif
uint16_t readyState;
if (NS_SUCCEEDED(aElement->GetReadyState(&readyState)) &&
(readyState == nsIDOMHTMLMediaElement::HAVE_NOTHING ||