Update EME browser tests to include EME WD

chrome/test/data/media/encrypted_media_utils.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var keySystem = QueryString.keySystem;
 var mediaFile = QueryString.mediaFile;
 var mediaType = QueryString.mediaType || 'video/webm; codecs="vorbis, vp8"';
 var useMSE = QueryString.useMSE == 1;
+var usePrefixedEME = QueryString.usePrefixedEME == 1;
 var forceInvalidResponse = QueryString.forceInvalidResponse == 1;
 var sessionToLoad = QueryString.sessionToLoad;
 var licenseServerURL = QueryString.licenseServerURL;
 // Maximum license request attempts that the media element can make to get a
 // valid license response from the license server.
 // This is used to avoid server boot up delays since there is no direct way
 // to know if it is ready crbug.com/339289.
 var MAX_LICENSE_REQUEST_ATTEMPTS = 3;
 // Delay in ms between retries to get a license from license server.
 var LICENSE_REQUEST_RETRY_DELAY_MS = 3000;
@@ skipping 25 matching lines @@
 function hasPrefix(msg, prefix) {
   if (msg.length < prefix.length)
     return false;
   for (var i = 0; i < prefix.length; ++i) {
     if (String.fromCharCode(msg[i]) != prefix[i])
       return false;
   }
   return true;
 }
 
+// JWK routines copied from third_party/WebKit/LayoutTests/media/

[shadi1, 2014/03/06 18:27:49]

s/JWK/JSON Web Key (JWK) 

+//   encrypted-media/encrypted-media-utils.js
+//
+// Encodes data (Uint8Array) into base64 string without trailing '='.
+// TODO: Update once the EME spec is updated to say base64url encoding.

[xhwang, 2014/03/06 16:36:53]

TODO(jrummell)

[jrummell, 2014/03/06 18:26:03]

Done.

+function base64Encode(data)
+{

[xhwang, 2014/03/06 16:36:53]

Nit: Layout test uses 

function foo
{
}

style. But this test uses

function foo {
}

I don't know what's the style rule for JS code in Chromium. But better be
consistent.

[ddorwin, 2014/03/06 18:11:10]

Hmm. This is copied from Blink as noted on line 55, so I think it's better left
this way. WDYT?

[shadi1, 2014/03/06 18:18:41]

I think that unless we are always keeping layout test version and this version
in sync we should reformat. 

[xhwang, 2014/03/06 18:20:57]

We need to keep the functionality of these two versions in sync. About the
format, I don't know. Either way is fine to me :)

[jrummell, 2014/03/06 18:26:03]

Made consistent with rest of file. Also updated leading spaces.

[shadi1, 2014/03/06 18:27:49]

What about adding comments 
// Start of copy of JWK helper functions
....
// End of copy of JWK helper functions

+    var result = btoa(String.fromCharCode.apply(null, data));
+    return result.replace(/=+$/g, '');
+}
+
+// Creates a JWK from raw key ID and key.
+function createJWK(keyId, key)
+{
+    var jwk = "{\"kty\":\"oct\",\"kid\":\"";
+    jwk += base64Encode(keyId);
+    jwk += "\",\"k\":\"";
+    jwk += base64Encode(key);
+    jwk += "\"}";
+    return jwk;
+}
+
+// Creates a JWK Set from an array of JWK(s).
+function createJWKSet()
+{
+    var jwkSet = "{\"keys\":[";
+    for (var i = 0; i < arguments.length; i++) {
+        if (i != 0)
+            jwkSet += ",";
+        jwkSet += arguments[i];
+    }
+    jwkSet += "]}";
+    return jwkSet;
+}
+
 function isHeartbeatMessage(msg) {
   return hasPrefix(msg, HEART_BEAT_HEADER);
 }
 
 function isFileIOTestMessage(msg) {
   return hasPrefix(msg, FILE_IO_TEST_RESULT_HEADER);
 }
 
 function loadEncryptedMediaFromURL(video) {
-  return loadEncryptedMedia(video, mediaFile, keySystem, KEY, useMSE);
+  return loadEncryptedMedia(video, mediaFile, keySystem, KEY, useMSE,
+                            usePrefixedEME);
 }
 
 function loadEncryptedMedia(video, mediaFile, keySystem, key, useMSE,
-                            appendSourceCallbackFn) {
+                            usePrefixedEME, appendSourceCallbackFn) {
   var keyRequested = false;
   var sourceOpened = false;
+  var mediaKeys;
+  var mediaKeySession;
   // Add properties to enable verification that events occurred.
   video.receivedKeyAdded = false;
   video.receivedHeartbeat = false;
   video.isHeartbeatExpected = keySystem === EXTERNAL_CLEAR_KEY_KEY_SYSTEM;
   video.receivedKeyMessage = false;
 
   if (!(video && mediaFile && keySystem && key)) {
     failTest('Missing parameters in loadEncryptedMedia().');
     return;
   }
 
+  // Shared by prefixed and unprefixed EME.
   function onNeedKey(e) {
     if (keyRequested)
       return;
     keyRequested = true;
     console.log('onNeedKey', e);
 
     var initData = sessionToLoad ? stringToUint8Array(
         PREFIXED_API_LOAD_SESSION_HEADER + sessionToLoad) : e.initData;
     try {
-      video.webkitGenerateKeyRequest(keySystem, initData);
+      if (usePrefixedEME) {
+        video.webkitGenerateKeyRequest(keySystem, initData);
+      } else {
+        mediaKeySession = mediaKeys.createSession(e.contentType, initData);
+        mediaKeySession.addEventListener('message', onMessage);
+        mediaKeySession.addEventListener('error', function() {
+            setResultInTitle("KeyError");
+        });
+        mediaKeySession.addEventListener('ready', onReady);
+      }
     }
     catch(error) {
       setResultInTitle(error.name);
     }
   }
 
+  // Prefixed EME callbacks.
   function onKeyAdded(e) {
     e.target.receivedKeyAdded = true;
   }
 
   function onKeyMessage(message) {
     video.receivedKeyMessage = true;
+
     if (!message.keySystem || message.keySystem != keySystem) {
       failTest('Message with unexpected keySystem: ' + message.keySystem);
       return;
     }
 
     if (!message.sessionId) {
       failTest('Message without a sessionId: ' + message.sessionId);
       return;
     }
 
+    processMessage(message, message.keySystem, message.defaultURL);
+  }
+
+  // Unprefixed EME callbacks.
+  function onReady(e) {
+  }
+
+  function onMessage(message) {
+    processMessage(message, keySystem, message.destinationURL);
+  }
+
+  // Shared by prefixed and unprefixed EME.
+  function processMessage(message, keySystem, url) {
+    video.receivedKeyMessage = true;
+
     if (!message.message) {
       failTest('Message without a message content: ' + message.message);
       return;
     }
 
     if (isHeartbeatMessage(message.message)) {
-      console.log('onKeyMessage - heartbeat', message);
-      message.target.receivedHeartbeat = true;
-      verifyHeartbeatMessage(message);
+      console.log('processMessage - heartbeat', message);
+      video.receivedHeartbeat = true;
+      verifyHeartbeatMessage(keySystem, url);
       return;
     }
 
     if (isFileIOTestMessage(message.message)) {
-      var success = getFileIOTestResult(message);
-      console.log('onKeyMessage - CDM file IO test: ' +
+      var success = getFileIOTestResult(keySystem, message);
+      console.log('processMessage - CDM file IO test: ' +
                   (success ? 'Success' : 'Fail'));
       if (success)
         setResultInTitle("FILEIOTESTSUCCESS");
       else
         setResultInTitle("FAILED");
       return;
     }
 
     // For FileIOTest key system, no need to start playback.
-    if (message.keySystem == EXTERNAL_CLEAR_KEY_FILE_IO_TEST_KEY_SYSTEM)
+    if (keySystem == EXTERNAL_CLEAR_KEY_FILE_IO_TEST_KEY_SYSTEM)
       return;
 
     // No tested key system returns defaultURL in for key request messages.

[xhwang, 2014/03/06 16:36:53]

shadi: Is this also true for Widevine?

[shadi1, 2014/03/06 18:18:41]

Yes. The policies used by the test license server do not have a default URL
value. If that changes, then this would fail. 

Since we just landed the test license server we can start to test this. However,
I think we should create specific policy test cases for that.

-    if (message.defaultURL) {
-      failTest('Message unexpectedly has defaultURL: ' + message.defaultURL);
+    if (url) {
+      failTest('Message unexpectedly has URL: ' + url);
       return;
     }
 
-    // When loading a session, no need to call webkitAddKey().
+    // When loading a session, no need to call update()/webkitAddKey().
     if (sessionToLoad)
       return;
 
-    console.log('onKeyMessage - key request', message);
+    console.log('processMessage - key request', message);
     if (forceInvalidResponse) {
-      console.log('Forcing an invalid onKeyMessage response.');
+      console.log('processMessage - Forcing an invalid response.');
       var invalidData = new Uint8Array([0xAA]);
-      video.webkitAddKey(keySystem, invalidData, invalidData);
+      if (usePrefixedEME) {
+        video.webkitAddKey(keySystem, invalidData, invalidData);
+      } else {
+        var jwkSet = stringToUint8Array(
+            createJWKSet(createJWK(invalidData, invalidData)));
+        mediaKeySession.update(jwkSet);

[xhwang, 2014/03/06 16:36:53]

Does the invalid response have to be a valid JWK set? e.g. Can we just
update(invalidData)?

[jrummell, 2014/03/06 18:26:03]

Done.

+      }
       return;
     }
     // Check if should send request to locally running license server.
     if (licenseServerURL) {
       requestLicense(message);
       return;
     }
-    console.log('Respond to onKeyMessage with test key.');
+    console.log('processMessage - Respond with test key.');
     var initData = message.message;
     if (mediaType.indexOf('mp4') != -1)
       initData = KEY_ID; // Temporary hack for Clear Key in v0.1.
-    video.webkitAddKey(keySystem, key, initData);
+    if (usePrefixedEME) {
+      video.webkitAddKey(keySystem, key, initData);
+    } else {
+      var jwkSet = stringToUint8Array(createJWKSet(createJWK(initData, key)));
+      mediaKeySession.update(jwkSet);
+    }
   }
 
-  function verifyHeartbeatMessage(message) {
+  function verifyHeartbeatMessage(keySystem, url) {
     String.prototype.startsWith = function(prefix) {
       return this.indexOf(prefix) === 0;
     }
 
     function isExternalClearKey(keySystem) {
       return keySystem == EXTERNAL_CLEAR_KEY_KEY_SYSTEM ||
              keySystem.startsWith(EXTERNAL_CLEAR_KEY_KEY_SYSTEM + '.');
     }
 
     // Only External Clear Key sends a HEARTBEAT message.
-    if (!isExternalClearKey(message.keySystem)) {
-      failTest('Unexpected heartbeat from ' + message.keySystem);
+    if (!isExternalClearKey(keySystem)) {
+      failTest('Unexpected heartbeat from ' + keySystem);
       return;
     }
 
-    if (message.defaultURL != EXTERNAL_CLEAR_KEY_HEARTBEAT_URL) {
-      failTest('Heartbeat message with unexpected defaultURL: ' +
-               message.defaultURL);
+    if (url != EXTERNAL_CLEAR_KEY_HEARTBEAT_URL) {
+      failTest('Heartbeat message with unexpected URL: ' + url);
       return;
     }
   }
 
-  function getFileIOTestResult(e) {
+  function getFileIOTestResult(keySystem, e) {
     // Only External Clear Key sends a FILEIOTESTRESULT message.
-    if (e.keySystem != EXTERNAL_CLEAR_KEY_FILE_IO_TEST_KEY_SYSTEM) {
-      failTest('Unexpected CDM file IO test result from ' + e.keySystem);
+    if (keySystem != EXTERNAL_CLEAR_KEY_FILE_IO_TEST_KEY_SYSTEM) {
+      failTest('Unexpected CDM file IO test result from ' + keySystem);
       return false;
     }
 
     // The test result is either '0' or '1' appended to the header.
     if (e.message.length != FILE_IO_TEST_RESULT_HEADER.length + 1)
       return false;
 
     var result_index = FILE_IO_TEST_RESULT_HEADER.length;
     return String.fromCharCode(e.message[result_index]) == 1;
   }
 
-  video.addEventListener('webkitneedkey', onNeedKey);
-  video.addEventListener('webkitkeymessage', onKeyMessage);
-  video.addEventListener('webkitkeyerror', function() {
-      setResultInTitle("KeyError");
-  });
-  video.addEventListener('webkitkeyadded', onKeyAdded);
+  if (usePrefixedEME) {
+    video.addEventListener('webkitneedkey', onNeedKey);
+    video.addEventListener('webkitkeymessage', onKeyMessage);
+    video.addEventListener('webkitkeyerror', function() {
+        setResultInTitle("KeyError");
+    });
+    video.addEventListener('webkitkeyadded', onKeyAdded);
+  } else {
+    video.addEventListener('needkey', onNeedKey);
+  }
   installTitleEventHandler(video, 'error');
 
   if (useMSE) {
     var mediaSource = loadMediaSource(mediaFile, mediaType,
                                       appendSourceCallbackFn);
     video.src = window.URL.createObjectURL(mediaSource);
   } else {
     video.src = mediaFile;
   }
+  if (!usePrefixedEME) {
+    mediaKeys = new MediaKeys(keySystem);
+    video.setMediaKeys(mediaKeys);
+  }
 }
 
 function getInitDataFromKeyId(keyID) {
   var init_key_id = new Uint8Array(keyID.length);
   for(var i = 0; i < keyID.length; i++) {
     init_key_id[i] = keyID.charCodeAt(i);
   }
   return init_key_id;
 }
 
@@ skipping 47 matching lines @@
     return false;
   var http = new XMLHttpRequest();
   http.open('HEAD', url, false);
   try {
     http.send();
     return http.status != 404;
   } catch (e) {
     return false;
   }
 }