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// Copyright (c) 2012 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/permissions/permissions_api.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/extensions/api/permissions/permissions_api_helpers.h"
#include "chrome/browser/extensions/extension_prefs.h"
#include "chrome/browser/extensions/permissions_updater.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/extensions/api/permissions.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/extensions/permissions/permissions_data.h"
#include "extensions/common/error_utils.h"
#include "extensions/common/permissions/permission_message_provider.h"
#include "extensions/common/permissions/permissions_info.h"
#include "extensions/common/url_pattern_set.h"
#include "url/gurl.h"
namespace extensions {
using api::permissions::Permissions;
namespace Contains = api::permissions::Contains;
namespace GetAll = api::permissions::GetAll;
namespace Remove = api::permissions::Remove;
namespace Request = api::permissions::Request;
namespace helpers = permissions_api_helpers;
namespace {
const char kCantRemoveRequiredPermissionsError[] =
"You cannot remove required permissions.";
const char kNotInOptionalPermissionsError[] =
"Optional permissions must be listed in extension manifest.";
const char kNotWhitelistedError[] =
"The optional permissions API does not support '*'.";
const char kUserGestureRequiredError[] =
"This function must be called during a user gesture";
enum AutoConfirmForTest {
DO_NOT_SKIP = 0,
PROCEED,
ABORT
};
AutoConfirmForTest auto_confirm_for_tests = DO_NOT_SKIP;
bool ignore_user_gesture_for_tests = false;
} // namespace
bool PermissionsContainsFunction::RunImpl() {
scoped_ptr<Contains::Params> params(Contains::Params::Create(*args_));
EXTENSION_FUNCTION_VALIDATE(params);
scoped_refptr<PermissionSet> permissions = helpers::UnpackPermissionSet(
params->permissions,
ExtensionPrefs::Get(GetProfile())->AllowFileAccess(extension_->id()),
&error_);
if (!permissions.get())
return false;
results_ = Contains::Results::Create(
GetExtension()->GetActivePermissions()->Contains(*permissions.get()));
return true;
}
bool PermissionsGetAllFunction::RunImpl() {
scoped_ptr<Permissions> permissions =
helpers::PackPermissionSet(GetExtension()->GetActivePermissions().get());
results_ = GetAll::Results::Create(*permissions);
return true;
}
bool PermissionsRemoveFunction::RunImpl() {
scoped_ptr<Remove::Params> params(Remove::Params::Create(*args_));
EXTENSION_FUNCTION_VALIDATE(params);
scoped_refptr<PermissionSet> permissions = helpers::UnpackPermissionSet(
params->permissions,
ExtensionPrefs::Get(GetProfile())->AllowFileAccess(extension_->id()),
&error_);
if (!permissions.get())
return false;
const Extension* extension = GetExtension();
// Make sure they're only trying to remove permissions supported by this API.
APIPermissionSet apis = permissions->apis();
for (APIPermissionSet::const_iterator i = apis.begin();
i != apis.end(); ++i) {
if (!i->info()->supports_optional()) {
error_ = ErrorUtils::FormatErrorMessage(
kNotWhitelistedError, i->name());
return false;
}
}
// Make sure we don't remove any required pemissions.
const PermissionSet* required =
PermissionsData::GetRequiredPermissions(extension);
scoped_refptr<PermissionSet> intersection(
PermissionSet::CreateIntersection(permissions.get(), required));
if (!intersection->IsEmpty()) {
error_ = kCantRemoveRequiredPermissionsError;
return false;
}
PermissionsUpdater(GetProfile())
.RemovePermissions(extension, permissions.get());
results_ = Remove::Results::Create(true);
return true;
}
// static
void PermissionsRequestFunction::SetAutoConfirmForTests(bool should_proceed) {
auto_confirm_for_tests = should_proceed ? PROCEED : ABORT;
}
// static
void PermissionsRequestFunction::SetIgnoreUserGestureForTests(
bool ignore) {
ignore_user_gesture_for_tests = ignore;
}
PermissionsRequestFunction::PermissionsRequestFunction() {}
void PermissionsRequestFunction::InstallUIProceed() {
PermissionsUpdater perms_updater(GetProfile());
perms_updater.AddPermissions(GetExtension(), requested_permissions_.get());
results_ = Request::Results::Create(true);
SendResponse(true);
Release(); // Balanced in RunImpl().
}
void PermissionsRequestFunction::InstallUIAbort(bool user_initiated) {
SendResponse(true);
Release(); // Balanced in RunImpl().
}
PermissionsRequestFunction::~PermissionsRequestFunction() {}
bool PermissionsRequestFunction::RunImpl() {
results_ = Request::Results::Create(false);
if (!user_gesture() &&
!ignore_user_gesture_for_tests &&
extension_->location() != Manifest::COMPONENT) {
error_ = kUserGestureRequiredError;
return false;
}
scoped_ptr<Request::Params> params(Request::Params::Create(*args_));
EXTENSION_FUNCTION_VALIDATE(params);
requested_permissions_ = helpers::UnpackPermissionSet(
params->permissions,
ExtensionPrefs::Get(GetProfile())->AllowFileAccess(extension_->id()),
&error_);
if (!requested_permissions_.get())
return false;
// Make sure they're only requesting permissions supported by this API.
APIPermissionSet apis = requested_permissions_->apis();
for (APIPermissionSet::const_iterator i = apis.begin();
i != apis.end(); ++i) {
if (!i->info()->supports_optional()) {
error_ = ErrorUtils::FormatErrorMessage(
kNotWhitelistedError, i->name());
return false;
}
}
// The requested permissions must be defined as optional in the manifest.
if (!PermissionsData::GetOptionalPermissions(GetExtension())
->Contains(*requested_permissions_.get())) {
error_ = kNotInOptionalPermissionsError;
return false;
}
// We don't need to prompt the user if the requested permissions are a subset
// of the granted permissions set.
scoped_refptr<const PermissionSet> granted = ExtensionPrefs::Get(
GetProfile())->GetGrantedPermissions(GetExtension()->id());
if (granted.get() && granted->Contains(*requested_permissions_.get())) {
PermissionsUpdater perms_updater(GetProfile());
perms_updater.AddPermissions(GetExtension(), requested_permissions_.get());
results_ = Request::Results::Create(true);
SendResponse(true);
return true;
}
// Filter out the granted permissions so we only prompt for new ones.
requested_permissions_ = PermissionSet::CreateDifference(
requested_permissions_.get(), granted.get());
AddRef(); // Balanced in InstallUIProceed() / InstallUIAbort().
// We don't need to show the prompt if there are no new warnings, or if
// we're skipping the confirmation UI. All extension types but INTERNAL
// are allowed to silently increase their permission level.
bool has_no_warnings =
PermissionMessageProvider::Get()->GetWarningMessages(
requested_permissions_, GetExtension()->GetType()).empty();
if (auto_confirm_for_tests == PROCEED || has_no_warnings ||
extension_->location() == Manifest::COMPONENT) {
InstallUIProceed();
} else if (auto_confirm_for_tests == ABORT) {
// Pretend the user clicked cancel.
InstallUIAbort(true);
} else {
CHECK_EQ(DO_NOT_SKIP, auto_confirm_for_tests);
install_ui_.reset(new ExtensionInstallPrompt(GetAssociatedWebContents()));
install_ui_->ConfirmPermissions(
this, GetExtension(), requested_permissions_.get());
}
return true;
}
} // namespace extensions
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