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// 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/media/protected_media_identifier_permission_context.h"
#include "base/prefs/pref_service.h"
#include "chrome/browser/content_settings/tab_specific_content_settings.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "components/content_settings/core/common/permission_request_id.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/web_contents.h"
#if defined(OS_CHROMEOS)
#include <utility>
#include "chrome/browser/chromeos/attestation/platform_verification_dialog.h"
#include "chrome/browser/chromeos/settings/cros_settings.h"
#include "chromeos/settings/cros_settings_names.h"
#include "ui/views/widget/widget.h"
using chromeos::attestation::PlatformVerificationDialog;
using chromeos::attestation::PlatformVerificationFlow;
#endif
ProtectedMediaIdentifierPermissionContext::
ProtectedMediaIdentifierPermissionContext(Profile* profile)
: PermissionContextBase(profile,
CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER)
#if defined(OS_CHROMEOS)
,
weak_factory_(this)
#endif
{
}
ProtectedMediaIdentifierPermissionContext::
~ProtectedMediaIdentifierPermissionContext() {
}
void ProtectedMediaIdentifierPermissionContext::RequestPermission(
content::WebContents* web_contents,
const PermissionRequestID& id,
const GURL& requesting_origin,
bool user_gesture,
const BrowserPermissionCallback& callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
GURL embedding_origin = web_contents->GetLastCommittedURL().GetOrigin();
if (!requesting_origin.is_valid() || !embedding_origin.is_valid() ||
!IsProtectedMediaIdentifierEnabled()) {
NotifyPermissionSet(id, requesting_origin, embedding_origin, callback,
false /* persist */, CONTENT_SETTING_BLOCK);
return;
}
#if defined(OS_CHROMEOS)
// On ChromeOS, we don't use PermissionContextBase::RequestPermission() which
// uses the standard permission infobar/bubble UI. See http://crbug.com/454847
// Instead, we check the content setting and show the existing platform
// verification UI.
// TODO(xhwang): Remove when http://crbug.com/454847 is fixed.
ContentSetting content_setting =
GetPermissionStatus(requesting_origin, embedding_origin);
if (content_setting == CONTENT_SETTING_ALLOW ||
content_setting == CONTENT_SETTING_BLOCK) {
NotifyPermissionSet(id, requesting_origin, embedding_origin, callback,
false /* persist */, content_setting);
return;
}
// Since the dialog is modal, we only support one prompt per |web_contents|.
// Reject the new one if there is already one pending. See
// http://crbug.com/447005
if (pending_requests_.count(web_contents)) {
callback.Run(CONTENT_SETTING_DEFAULT);
return;
}
views::Widget* widget = PlatformVerificationDialog::ShowDialog(
web_contents, requesting_origin,
base::Bind(&ProtectedMediaIdentifierPermissionContext::
OnPlatformVerificationResult,
weak_factory_.GetWeakPtr(), web_contents, id,
requesting_origin, embedding_origin, callback));
pending_requests_.insert(
std::make_pair(web_contents, std::make_pair(widget, id)));
#else
PermissionContextBase::RequestPermission(web_contents, id, requesting_origin,
user_gesture, callback);
#endif
}
ContentSetting ProtectedMediaIdentifierPermissionContext::GetPermissionStatus(
const GURL& requesting_origin,
const GURL& embedding_origin) const {
if (!IsProtectedMediaIdentifierEnabled())
return CONTENT_SETTING_BLOCK;
return PermissionContextBase::GetPermissionStatus(requesting_origin,
embedding_origin);
}
void ProtectedMediaIdentifierPermissionContext::CancelPermissionRequest(
content::WebContents* web_contents,
const PermissionRequestID& id) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
#if defined(OS_CHROMEOS)
PendingRequestMap::iterator request = pending_requests_.find(web_contents);
if (request == pending_requests_.end() || !request->second.second.Equals(id))
return;
// Close the |widget_|. OnPlatformVerificationResult() will be fired
// during this process, but since |web_contents| is removed from
// |pending_requests_|, the callback will simply be dropped.
views::Widget* widget = request->second.first;
pending_requests_.erase(request);
widget->Close();
#else
PermissionContextBase::CancelPermissionRequest(web_contents, id);
#endif
}
void ProtectedMediaIdentifierPermissionContext::UpdateTabContext(
const PermissionRequestID& id,
const GURL& requesting_frame,
bool allowed) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// WebContents may have gone away.
TabSpecificContentSettings* content_settings =
TabSpecificContentSettings::Get(id.render_process_id(),
id.render_view_id());
if (content_settings) {
content_settings->OnProtectedMediaIdentifierPermissionSet(
requesting_frame.GetOrigin(), allowed);
}
}
// TODO(xhwang): We should consolidate the "protected content" related pref
// across platforms.
bool ProtectedMediaIdentifierPermissionContext::
IsProtectedMediaIdentifierEnabled() const {
bool enabled = false;
#if defined(OS_ANDROID)
enabled = profile()->GetPrefs()->GetBoolean(
prefs::kProtectedMediaIdentifierEnabled);
#endif
#if defined(OS_CHROMEOS)
// This could be disabled by the device policy.
bool enabled_for_device = false;
enabled = chromeos::CrosSettings::Get()->GetBoolean(
chromeos::kAttestationForContentProtectionEnabled,
&enabled_for_device) &&
enabled_for_device &&
profile()->GetPrefs()->GetBoolean(prefs::kEnableDRM);
#endif
DVLOG_IF(1, !enabled)
<< "Protected media identifier disabled by the user or by device policy.";
return enabled;
}
#if defined(OS_CHROMEOS)
void ProtectedMediaIdentifierPermissionContext::OnPlatformVerificationResult(
content::WebContents* web_contents,
const PermissionRequestID& id,
const GURL& requesting_origin,
const GURL& embedding_origin,
const BrowserPermissionCallback& callback,
chromeos::attestation::PlatformVerificationFlow::ConsentResponse response) {
// The request may have been canceled. Drop the callback in that case.
PendingRequestMap::iterator request = pending_requests_.find(web_contents);
if (request == pending_requests_.end())
return;
DCHECK(request->second.second.Equals(id));
pending_requests_.erase(request);
ContentSetting content_setting = CONTENT_SETTING_DEFAULT;
bool persist = false; // Whether the ContentSetting should be saved.
switch (response) {
case PlatformVerificationFlow::CONSENT_RESPONSE_NONE:
content_setting = CONTENT_SETTING_DEFAULT;
persist = false;
break;
case PlatformVerificationFlow::CONSENT_RESPONSE_ALLOW:
content_setting = CONTENT_SETTING_ALLOW;
persist = true;
break;
case PlatformVerificationFlow::CONSENT_RESPONSE_DENY:
content_setting = CONTENT_SETTING_BLOCK;
persist = true;
break;
}
NotifyPermissionSet(
id, requesting_origin, embedding_origin, callback,
persist, content_setting);
}
#endif
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