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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/166721">166721</a></dd>
<dt>Author</dt> <dd>jer.noble@apple.com</dd>
<dt>Date</dt> <dd>2014-04-03 09:26:33 -0700 (Thu, 03 Apr 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>[EME] Crash when passing a NULL initData to MediaKeys.createSession()
https://bugs.webkit.org/show_bug.cgi?id=131156
Reviewed by Eric Carlson.
Update the checks at the start of createSession() to match the current spec, notably
bailing early if the initData parameter is NULL or empty.
* Modules/encryptedmedia/MediaKeys.cpp:
(WebCore::MediaKeys::createSession):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreModulesencryptedmediaMediaKeyscpp">trunk/Source/WebCore/Modules/encryptedmedia/MediaKeys.cpp</a></li>
</ul>
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<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (166720 => 166721)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2014-04-03 16:03:46 UTC (rev 166720)
+++ trunk/Source/WebCore/ChangeLog 2014-04-03 16:26:33 UTC (rev 166721)
</span><span class="lines">@@ -1,3 +1,16 @@
</span><ins>+2014-04-03 Jer Noble <jer.noble@apple.com>
+
+ [EME] Crash when passing a NULL initData to MediaKeys.createSession()
+ https://bugs.webkit.org/show_bug.cgi?id=131156
+
+ Reviewed by Eric Carlson.
+
+ Update the checks at the start of createSession() to match the current spec, notably
+ bailing early if the initData parameter is NULL or empty.
+
+ * Modules/encryptedmedia/MediaKeys.cpp:
+ (WebCore::MediaKeys::createSession):
+
</ins><span class="cx"> 2014-04-03 Eric Carlson <eric.carlson@apple.com>
</span><span class="cx">
</span><span class="cx"> [iOS] add missing QuickTime plug-in replacement API
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesencryptedmediaMediaKeyscpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/encryptedmedia/MediaKeys.cpp (166720 => 166721)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/encryptedmedia/MediaKeys.cpp 2014-04-03 16:03:46 UTC (rev 166720)
+++ trunk/Source/WebCore/Modules/encryptedmedia/MediaKeys.cpp 2014-04-03 16:26:33 UTC (rev 166721)
</span><span class="lines">@@ -89,29 +89,33 @@
</span><span class="cx"> // The createSession(type, initData) method must run the following steps:
</span><span class="cx"> // Note: The contents of initData are container-specific Initialization Data.
</span><span class="cx">
</span><del>- // 1. If type is null or an empty string and initData is not null or an empty string, throw an
- // INVALID_ACCESS_ERR exception and abort these steps.
- if ((type.isNull() || type.isEmpty()) && (!initData || initData->length())) {
</del><ins>+ // 1. If contentType is null or an empty string, throw an INVALID_ACCESS_ERR exception and abort these steps.
+ if (type.isEmpty()) {
</ins><span class="cx"> ec = INVALID_ACCESS_ERR;
</span><span class="cx"> return 0;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- // 2. If type contains a MIME type that is not supported or is not supported by the keySystem, throw
</del><ins>+ // 2. If initData is null or an empty array, throw an INVALID_ACCESS_ERR exception and abort these steps.
+ if (!initData || !initData->length()) {
+ ec = INVALID_ACCESS_ERR;
+ return 0;
+ }
+
+ // 3. If type contains a MIME type that is not supported or is not supported by the keySystem, throw
</ins><span class="cx"> // a NOT_SUPPORTED_ERR exception and abort these steps.
</span><span class="cx"> if (!type.isNull() && !type.isEmpty() && !m_cdm->supportsMIMEType(type)) {
</span><span class="cx"> ec = NOT_SUPPORTED_ERR;
</span><span class="cx"> return 0;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- // 3. Create a new MediaKeySession object.
- // 3.1 Let the keySystem attribute be keySystem.
- // 3.2 Let the sessionId attribute be a unique Session ID string. It may be generated by cdm.
</del><ins>+ // 4. Create a new MediaKeySession object.
+ // 4.1 Let the keySystem attribute be keySystem.
+ // 4.2 Let the sessionId attribute be a unique Session ID string. It may be generated by cdm.
</ins><span class="cx"> RefPtr<MediaKeySession> session = MediaKeySession::create(context, this, keySystem());
</span><span class="cx">
</span><del>- // 4. Add the new object to an internal list of session objects.
</del><span class="cx"> m_sessions.append(session);
</span><span class="cx">
</span><del>- // 5. Schedule a task to generate a key request, providing type, initData, and the new object.
</del><ins>+ // 5. Schedule a task to initialize the session, providing contentType, initData, and the new object.
</ins><span class="cx"> session->generateKeyRequest(type, initData);
</span><span class="cx">
</span><span class="cx"> // 6. Return the new object to the caller.
</span></span></pre>
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