7 files changed, 104 insertions, 0 deletions
diff --git a/dom/security/nsCSPContext.cpp b/dom/security/nsCSPContext.cpp
index 815c7734d..0a3e20305 100644
--- a/dom/security/nsCSPContext.cpp
+++ b/dom/security/nsCSPContext.cpp
@@ -343,6 +343,20 @@ nsCSPContext::GetBlockAllMixedContent(bool *outBlockAllMixedContent)
 }
 
 NS_IMETHODIMP
+nsCSPContext::GetEnforcesFrameAncestors(bool *outEnforcesFrameAncestors)
+{
+  *outEnforcesFrameAncestors = false;
+  for (uint32_t i = 0; i < mPolicies.Length(); i++) {
+    if (!mPolicies[i]->getReportOnlyFlag() &&
+        mPolicies[i]->hasDirective(nsIContentSecurityPolicy::FRAME_ANCESTORS_DIRECTIVE)) {
+      *outEnforcesFrameAncestors = true;
+      return NS_OK;
+    }
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
 nsCSPContext::GetReferrerPolicy(uint32_t* outPolicy, bool* outIsSet)
 {
   *outIsSet = false;
diff --git a/dom/security/test/csp/file_ignore_xfo.html b/dom/security/test/csp/file_ignore_xfo.html
new file mode 100644
index 000000000..6746a3adb
--- /dev/null
+++ b/dom/security/test/csp/file_ignore_xfo.html
@@ -0,0 +1,10 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Bug 1024557: Ignore x-frame-options if CSP with frame-ancestors exists</title>
+</head>
+<body>
+<div id="cspmessage">Ignoring XFO because of CSP</div>
+</body>
+</html>
diff --git a/dom/security/test/csp/file_ignore_xfo.html^headers^ b/dom/security/test/csp/file_ignore_xfo.html^headers^
new file mode 100644
index 000000000..e93f9e3ec
--- /dev/null
+++ b/dom/security/test/csp/file_ignore_xfo.html^headers^
@@ -0,0 +1,3 @@
+Content-Security-Policy: frame-ancestors http://mochi.test:8888
+X-Frame-Options: deny
+Cache-Control: no-cache
diff --git a/dom/security/test/csp/file_ro_ignore_xfo.html b/dom/security/test/csp/file_ro_ignore_xfo.html
new file mode 100644
index 000000000..85e7f0092
--- /dev/null
+++ b/dom/security/test/csp/file_ro_ignore_xfo.html
@@ -0,0 +1,10 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Bug 1024557: Ignore x-frame-options if CSP with frame-ancestors exists</title>
+</head>
+<body>
+<div id="cspmessage">Ignoring XFO because of CSP_RO</div>
+</body>
+</html>
+\ No newline at end of file
diff --git a/dom/security/test/csp/file_ro_ignore_xfo.html^headers^ b/dom/security/test/csp/file_ro_ignore_xfo.html^headers^
new file mode 100644
index 000000000..ab8366f06
--- /dev/null
+++ b/dom/security/test/csp/file_ro_ignore_xfo.html^headers^
@@ -0,0 +1,3 @@
+Content-Security-Policy-Report-Only: frame-ancestors http://mochi.test:8888
+X-Frame-Options: deny
+Cache-Control: no-cache
diff --git a/dom/security/test/csp/mochitest.ini b/dom/security/test/csp/mochitest.ini
index 8add999c3..535109752 100644
--- a/dom/security/test/csp/mochitest.ini
+++ b/dom/security/test/csp/mochitest.ini
@@ -206,6 +206,10 @@ support-files =
   file_iframe_srcdoc.sjs
   file_iframe_sandbox_srcdoc.html
   file_iframe_sandbox_srcdoc.html^headers^
+  file_ignore_xfo.html
+  file_ignore_xfo.html^headers^
+  file_ro_ignore_xfo.html
+  file_ro_ignore_xfo.html^headers^
 
 [test_base-uri.html]
 [test_blob_data_schemes.html]
@@ -298,3 +302,4 @@ tags = mcb
 support-files =
   file_sandbox_allow_scripts.html
   file_sandbox_allow_scripts.html^headers^
+[test_ignore_xfo.html]
diff --git a/dom/security/test/csp/test_ignore_xfo.html b/dom/security/test/csp/test_ignore_xfo.html
new file mode 100644
index 000000000..fb3aadc6c
--- /dev/null
+++ b/dom/security/test/csp/test_ignore_xfo.html
@@ -0,0 +1,59 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Bug 1024557: Ignore x-frame-options if CSP with frame-ancestors exists</title>
+  <!-- Including SimpleTest.js so we can use waitForExplicitFinish !-->
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<iframe style="width:100%;" id="csp_testframe"></iframe>
+<iframe style="width:100%;" id="csp_ro_testframe"></iframe>
+
+<script class="testbody" type="text/javascript">
+
+/*
+ * We load two frames using:
+ *   x-frame-options: deny
+ * where the first frame uses a csp and the second a csp_ro including frame-ancestors.
+ * We make sure that xfo is ignored for regular csp but not for csp_ro.
+ */
+
+SimpleTest.waitForExplicitFinish();
+
+var testcounter = 0;
+function checkFinished() {
+  testcounter++;
+  if (testcounter < 2) {
+  	return;
+  }
+  SimpleTest.finish();
+}
+
+// 1) test XFO with CSP
+var csp_testframe = document.getElementById("csp_testframe");
+csp_testframe.onload = function() {
+  var msg = csp_testframe.contentWindow.document.getElementById("cspmessage");
+  is(msg.innerHTML, "Ignoring XFO because of CSP", "Loading frame with with XFO and CSP");
+  checkFinished();
+}
+csp_testframe.onerror = function() {
+  ok(false, "sanity: should not fire onerror for csp_testframe");
+}
+csp_testframe.src = "file_ignore_xfo.html";
+
+// 2) test XFO with CSP_RO
+var csp_ro_testframe = document.getElementById("csp_ro_testframe");
+csp_ro_testframe.onload = function() {
+  var msg = csp_ro_testframe.contentWindow.document.getElementById("cspmessage");
+  is(msg, null, "Blocking frame with with XFO and CSP_RO");
+  checkFinished();
+}
+csp_ro_testframe.onerror = function() {
+  ok(false, "sanity: should not fire onerror for csp_ro_testframe");
+}
+csp_ro_testframe.src = "file_ro_ignore_xfo.html";
+
+</script>
+</body>
+</html>