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// Copyright 2021 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.
module crosapi.mojom;
// Status returned by a successful call to QueryWindowStatus.
struct ContentProtectionWindowStatus {
// The type of connected output links, which is a bit-mask of the LinkType
// values.
uint32 link_mask@0;
// The type of enabled protections, which is a bit-mask of the ProtectionType
// values.
uint32 protection_mask@1;
// Returned by a successful call to ChallengePlatform. The structure mirrors the
// CdmDocumentService interface to avoid unnecessary conversions.
struct ChallengePlatformResult {
// The data signed by the platform.
string signed_data;
// The signature of the signed data block.
string signed_data_signature;
// The device specific certificate for the requested service.
string platform_key_certificate;
// This interface is implemented by Ash-Chrome.
// This allows Lacros to support content protection.
// The bitfields in this struct use [Stable] enums defined in
// media/mojo/mojom/output_protection.mojom.
// The input parameter |window_id| should be obtained from
// PlatformWindow::GetWindowUniqueId(). A typical format might be:
// "org.chromium.lacros.9A82A161B2A0B9BADF75E9BB958B9FCB"
// Note that the Window abstraction, and its corresponding |window_id| are
// communicated over Wayland IPC. There's no synchronization between Wayland and
// Crosapi, so it's technically possible for Lacros to create a window, and
// then call one of these methods, but for Ash to not yet know about the
// |window_id|. As such, a failure in one of these methods is not considered
// irrecoverable -- it's possible that calling the method again at a later point
// in time will result in success.
[Stable, Uuid="e3020766-dd9b-4cfe-b387-8ed677212b50"]
interface ContentProtection {
// Returns content-protection related status for a window. Returns null on
// failure.
QueryWindowStatus@0(string window_id) =>
(ContentProtectionWindowStatus? status);
// Enables content protection for a window.
// - desired_protection_mask: The desired protection methods, which
// is a bit-mask of the ProtectionType values.
// - success: True when the protection request has been made. This may be
// before the protection have actually been applied. Call
// QueryWindowStatus() to get protection status. False if it failed to make
// the protection request, and in this case there is no need to call
// QueryStatus().
EnableWindowProtection@1(string window_id, uint32 desired_protection_mask) =>
(bool success);
// Returns the system hash in hex encoded ascii. This may return an empty
// string on error.
// This intentionally mirrors the existing SystemSaltGetter API to avoid
// unnecessary conversions on both sides of the crosapi interface.
GetSystemSalt@2() => (string salt);
// Allows authorized services to verify that the underlying platform is
// trusted. An example of a trusted platform is a Chrome OS device in
// verified boot mode. This can be used for protected content playback.
// Input parameters:
// - |service_id|: the service ID for the |challenge|.
// - |challenge|: the challenge data.
// The input parameters mirror the CdmDocumentService interface to avoid
// unnecessary conversions.
// Returns null on failure.
ChallengePlatform@3(string service_id, string challenge) =>
(ChallengePlatformResult? result);
// Returns true if Verified Access is enabled in settings, false otherwise.
IsVerifiedAccessEnabled@4() => (bool enabled);