Implement ContentSecurityPolicy on the browser-side.

content/common/content_security_policy/csp_policy_unittest.cc

+// Copyright 2017 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 "content/common/content_security_policy/csp_context.h"
+#include "content/common/content_security_policy_header.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+namespace {
+class CSPContextTest : public CSPContext {
+ public:
+  const std::string& LastConsoleMessage() { return console_message_; }
+
+ private:
+  void LogToConsole(const std::string& message) override {
+    console_message_ = message;
+  }
+  std::string console_message_;
+};
+
+CSPPolicy ParsePolicy(CSPContext* context, const std::string& value) {
+  return CSPPolicy::Parse(context,
+                          ContentSecurityPolicyHeader{
+                              value, blink::WebContentSecurityPolicyTypeEnforce,
+                              blink::WebContentSecurityPolicySourceHTTP});
+}
+
+}  // namespace
+
+TEST(CSPPolicy, ReportDuplicateDirective) {
+  {
+    CSPContextTest context;
+    CSPPolicy policy = ParsePolicy(&context,
+                                   "default-src 'self';"
+                                   "default-src 'self'");
+    const char console_message[] =
+        "Ignoring duplicate Content-Security-Policy directive 'default-src'.\n";
+    EXPECT_EQ(console_message, context.LastConsoleMessage());
+  }
+  {
+    CSPContextTest context;
+    CSPPolicy policy = ParsePolicy(&context,
+                                   "report-uri 'self';"
+                                   "report-uri 'self'");
+    const char console_message[] =
+        "Ignoring duplicate Content-Security-Policy directive 'report-uri'.\n";
+    EXPECT_EQ(console_message, context.LastConsoleMessage());
+  }
+}
+
+TEST(CSPPolicy, ReportInvalidDirectiveInMeta) {
+  CSPContextTest context;
+  CSPPolicy policy = CSPPolicy::Parse(
+      &context,
+      ContentSecurityPolicyHeader{"frame-ancestors 'self'",
+                                  blink::WebContentSecurityPolicyTypeEnforce,
+                                  blink::WebContentSecurityPolicySourceMeta});
+  const char console_message[] =
+      "Content Security Policies delivered via a <meta> element may not "
+      "contain the frame-ancestors directive.";
+  EXPECT_EQ(console_message, context.LastConsoleMessage());
+}
+
+TEST(CSPPolicy, ReportViolation) {
+  CSPContextTest context;
+
+  CSPPolicy policy = ParsePolicy(&context, "form-action www.example.com");
+  EXPECT_FALSE(policy.Allow(&context, CSPDirective::FormAction,
+                            GURL("http://www.not-example.com")));
+
+  const char console_message[] =
+      "Refused to send form data to 'http://www.not-example.com/' because it "
+      "violates the following Content Security Policy directive: \"form-action "
+      "www.example.com\"\n";
+  EXPECT_EQ(console_message, context.LastConsoleMessage());
+}
+
+TEST(CSPPolicy, DirectiveFallback) {
+  {
+    CSPContextTest context;
+    CSPPolicy policy = ParsePolicy(&context, "default-src http://a.com");
+    EXPECT_FALSE(
+        policy.Allow(&context, CSPDirective::FrameSrc, GURL("http://b.com")));
+    const char console_message[] =
+        "Refused to frame 'http://b.com/' because it violates "
+        "the following Content Security Policy directive: \"default-src "
+        "http://a.com\" Note that 'frame-src' was not explicitly "
+        "set, so 'default-src' is used as a fallback.\n";
+    EXPECT_EQ(console_message, context.LastConsoleMessage());
+    EXPECT_TRUE(
+        policy.Allow(&context, CSPDirective::FrameSrc, GURL("http://a.com")));
+  }
+  {
+    CSPContextTest context;
+    CSPPolicy policy = ParsePolicy(&context, "child-src http://a.com");
+    EXPECT_FALSE(
+        policy.Allow(&context, CSPDirective::FrameSrc, GURL("http://b.com")));
+    const char console_message[] =
+        "Refused to frame 'http://b.com/' because it violates "
+        "the following Content Security Policy directive: \"child-src "
+        "http://a.com\" Note that 'frame-src' was not explicitly "
+        "set, so 'child-src' is used as a fallback.\n";
+    EXPECT_EQ(console_message, context.LastConsoleMessage());
+    EXPECT_TRUE(
+        policy.Allow(&context, CSPDirective::FrameSrc, GURL("http://a.com")));
+  }
+  {
+    CSPContextTest context;
+    CSPPolicy policy = ParsePolicy(&context,
+                                   "frame-src http://a.com;"
+                                   "child-src http://b.com;");
+    EXPECT_TRUE(
+        policy.Allow(&context, CSPDirective::FrameSrc, GURL("http://a.com")));
+    EXPECT_FALSE(
+        policy.Allow(&context, CSPDirective::FrameSrc, GURL("http://b.com")));
+    const char console_message[] =
+        "Refused to frame 'http://b.com/' because it violates "
+        "the following Content Security Policy directive: \"frame-src "
+        "http://a.com\"\n";
+    EXPECT_EQ(console_message, context.LastConsoleMessage());
+  }
+}
+
+}  // namespace content