Part 3.4: Is policy list subsumed under subsuming policy?

third_party/WebKit/Source/core/frame/csp/SourceListDirectiveTest.cpp

 // Copyright 2015 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.
 
 #include "core/frame/csp/SourceListDirective.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/csp/CSPSource.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "platform/network/ResourceRequest.h"
@@ skipping 724 matching lines @@
     for (const auto& sources : test.sourcesB) {
       SourceListDirective* member = new SourceListDirective(
           test.isScriptSrc ? "script-src" : "style-src", sources, cspB);
       vectorB.append(member);
     }
 
     EXPECT_EQ(A.subsumes(vectorB), test.expected);
   }
 }
 
+TEST_F(SourceListDirectiveTest, SubsumesOtherAllowAttributes) {
+  struct TestCase {
+    bool isScriptSrc;
+    String sourcesA;
+    std::vector<String> sourcesB;
+    bool expected;
+  } cases[] = {
+      // A or policiesB contain `unsafe-eval`.
+      {false,
+       "http://example1.com/foo/ 'self' 'unsafe-inline' 'strict-dynamic' "
+       "'unsafe-eval'",
+       {"http://example1.com/foo/bar.html 'unsafe-eval'"},
+       true},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-eval'",
+       {"http://example1.com/foo/ 'unsafe-inline'"},
+       false},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-eval'",
+       {"http://example1.com/foo/ 'unsafe-inline' 'unsafe-eval'"},
+       false},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-eval'",
+       {"http://example1.com/foo/ 'unsafe-eval'",
+        "http://example1.com/foo/bar 'self' unsafe-eval'",
+        "http://non-example.com/foo/ 'unsafe-eval' 'self'"},
+       true},
+      {true,
+       "http://example1.com/foo/ 'self'",
+       {"http://example1.com/foo/ 'unsafe-eval'"},
+       false},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-inline'",
+       {"http://example1.com/foo/ 'unsafe-eval'",
+        "http://example1.com/foo/bar 'self' 'unsafe-eval'",
+        "http://non-example.com/foo/ 'unsafe-eval' 'self'"},
+       false},
+      // A or policiesB contain `unsafe-hashed-attributes`.
+      {false,
+       "http://example1.com/foo/ 'self' 'unsafe-inline' 'unsafe-eval' "
+       "'strict-dynamic' "
+       "'unsafe-hashed-attributes'",
+       {"http://example1.com/foo/bar.html 'unsafe-hashed-attributes'"},
+       true},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-hashed-attributes'",
+       {"http://example1.com/foo/ 'unsafe-inline'"},
+       false},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-hashed-attributes'",
+       {"http://example1.com/foo/ 'unsafe-inline' 'unsafe-hashed-attributes'"},
+       false},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-eval' "
+       "'unsafe-hashed-attributes'",
+       {"http://example1.com/foo/ 'unsafe-eval' 'unsafe-hashed-attributes'",
+        "http://example1.com/foo/bar 'self' 'unsafe-hashed-attributes'",
+        "http://non-example.com/foo/ 'unsafe-hashed-attributes' 'self'"},
+       true},
+      {true,
+       "http://example1.com/foo/ 'self'",
+       {"http://example1.com/foo/ 'unsafe-hashed-attributes'"},
+       false},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-inline'",
+       {"http://example1.com/foo/ 'unsafe-hashed-attributes'",
+        "http://example1.com/foo/bar 'self' 'unsafe-hashed-attributes'",
+        "https://example1.com/foo/bar 'unsafe-hashed-attributes' 'self'"},
+       false},
+      // A or policiesB contain `strict-dynamic`. Note that `strict-dynamic`
+      // only is effective for `script-src` directives.
+      {false,
+       "http://example1.com/foo/ 'self' 'unsafe-eval'",
+       {"http://example1.com/foo/bar.html 'strict-dynamic'"},
+       true},
+      {false,
+       "http://example1.com/foo/ 'self' 'strict-dynamic'",
+       {"http://example1.com/foo/bar.html 'strict-dynamic'"},
+       true},
+      {true,
+       "http://example1.com/foo/ 'self' 'strict-dynamic'",
+       {"http://example1.com/foo/ 'unsafe-inline'"},
+       false},
+      {true,
+       "http://example1.com/foo/ 'self' 'strict-dynamic'",
+       {"http://example1.com/foo/ 'unsafe-inline' 'strict-dynamic'"},
+       true},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-eval' 'strict-dynamic'",
+       {"http://example1.com/foo/ 'unsafe-eval' 'unsafe-inline' "
+        "'strict-dynamic'",
+        "http://example1.com/foo/bar 'unsafe-inline' 'strict-dynamic'",
+        "http://non-example.com/foo/ 'strict-dynamic' 'unsafe-inline'"},
+       true},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-eval'",
+       {"http://example1.com/foo/ 'strict-dynamic'"},
+       false},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-inline'",
+       {"http://example1.com/foo/ 'strict-dynamic'",
+        "http://example1.com/foo/bar 'self' 'strict-dynamic'",
+        "https://example1.com/foo/bar 'strict-dynamic' 'self'"},
+       true},

[Mike West, 2016/11/30 10:12:53]

Why is this true?

The group of sources looks like it boils down to something like
`https://example1.com/foo/bar 'strict-dynamic'`. That allows a different set of
sources than `http://example1.com/foo/ 'self' 'unsafe-inline'`, as
`'strict-dynamic'` means that  a script loaded from
`https://example1.com/foo/bar/script.js` could load
`https://evil.com/script.js`.

+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-inline' 'nonce-yay'",
+       {"http://example1.com/foo/ 'strict-dynamic'",
+        "http://example1.com/foo/bar 'self' 'strict-dynamic'",
+        "https://example1.com/foo/bar 'strict-dynamic' 'self'"},
+       false},
+      {true,
+       "http://example1.com/foo/ 'self' 'unsafe-inline' 'nonce-yay' "
+       "'strict-dynamic'",
+       {"http://example1.com/foo/ 'strict-dynamic'",
+        "http://example1.com/foo/bar 'self' 'strict-dynamic'",
+        "https://example1.com/foo/bar 'strict-dynamic' 'self'"},
+       true},
+  };
+
+  for (const auto& test : cases) {
+    SourceListDirective A(test.isScriptSrc ? "script-src" : "style-src",
+                          test.sourcesA, csp.get());
+    ContentSecurityPolicy* cspB =
+        SetUpWithOrigin("https://another.test/image.png");
+
+    HeapVector<Member<SourceListDirective>> vectorB;
+    for (const auto& sources : test.sourcesB) {
+      SourceListDirective* member = new SourceListDirective(
+          test.isScriptSrc ? "script-src" : "style-src", sources, cspB);
+      vectorB.append(member);
+    }
+
+    EXPECT_EQ(A.subsumes(vectorB), test.expected);
+  }
+}
+
 }  // namespace blink