Add managed policies for Native Messaging

chrome/browser/extensions/api/messaging/native_messaging_policy_handler.cc

+// 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.
+
+#include "chrome/browser/extensions/api/messaging/native_messaging_policy_handler.h"
+
+#include "base/logging.h"
+#include "base/prefs/pref_value_map.h"
+#include "chrome/browser/extensions/api/messaging/native_messaging_host_manifest.h"
+#include "chrome/browser/extensions/external_policy_loader.h"
+#include "chrome/common/pref_names.h"
+#include "components/policy/core/browser/policy_error_map.h"
+#include "components/policy/core/common/policy_map.h"
+#include "grit/component_strings.h"
+#include "policy/policy_constants.h"
+
+namespace extensions {
+
+NativeMessagingHostListPolicyHandler::NativeMessagingHostListPolicyHandler(
+    const char* policy_name,
+    const char* pref_path,
+    bool allow_wildcards)
+    : policy::TypeCheckingPolicyHandler(policy_name, base::Value::TYPE_LIST),
+      pref_path_(pref_path),
+      allow_wildcards_(allow_wildcards) {}
+
+NativeMessagingHostListPolicyHandler::~NativeMessagingHostListPolicyHandler() {}
+
+bool NativeMessagingHostListPolicyHandler::CheckPolicySettings(
+    const policy::PolicyMap& policies,
+    policy::PolicyErrorMap* errors) {
+  return CheckAndGetList(policies, errors, NULL);
+}
+
+void NativeMessagingHostListPolicyHandler::ApplyPolicySettings(
+    const policy::PolicyMap& policies,
+    PrefValueMap* prefs) {
+  scoped_ptr<base::ListValue> list;
+  policy::PolicyErrorMap errors;
+  if (CheckAndGetList(policies, &errors, &list) && list)
+    prefs->SetValue(pref_path(), list.release());
+}
+
+const char* NativeMessagingHostListPolicyHandler::pref_path() const {
+  return pref_path_;
+}
+
+bool NativeMessagingHostListPolicyHandler::CheckAndGetList(
+    const policy::PolicyMap& policies,
+    policy::PolicyErrorMap* errors,
+    scoped_ptr<base::ListValue>* names) {
+  const base::Value* value = NULL;
+  if (!CheckAndGetValue(policies, errors, &value))
+    return false;
+
+  if (!value)
+    return true;
+
+  const base::ListValue* list_value = NULL;
+  if (!value->GetAsList(&list_value)) {
+    NOTREACHED();
+    return false;
+  }
+
+  // Filter the list, rejecting any invalid native messaging host names.
+  scoped_ptr<base::ListValue> filtered_list(new base::ListValue());
+  for (base::ListValue::const_iterator entry(list_value->begin());
+       entry != list_value->end(); ++entry) {
+    std::string name;
+    if (!(*entry)->GetAsString(&name)) {
+      errors->AddError(policy_name(),
+                       entry - list_value->begin(),
+                       IDS_POLICY_TYPE_ERROR,
+                       ValueTypeToString(base::Value::TYPE_STRING));
+      continue;
+    }
+    if (!(allow_wildcards_ && name == "*") &&
+        !NativeMessagingHostManifest::IsValidName(name)) {
+      errors->AddError(policy_name(),
+                       entry - list_value->begin(),
+                       IDS_POLICY_VALUE_FORMAT_ERROR);
+      continue;
+    }
+    filtered_list->Append(new base::StringValue(name));
+  }
+
+  if (names)
+    *names = filtered_list.Pass();
+
+  return true;
+}
+
+}  // namespace extensions