1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
// Copyright 2013 The Chromium Authors
// 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/command_line.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/metrics/user_metrics.h"
#include "base/strings/string_split.h"
#include "build/build_config.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/pref_names.h"
#include "components/content_settings/browser/page_specific_content_settings.h"
#include "components/permissions/permission_util.h"
#include "components/prefs/pref_service.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "media/base/media_switches.h"
#include "net/base/url_util.h"
#include "services/network/public/mojom/permissions_policy/permissions_policy_feature.mojom.h"
#if BUILDFLAG(IS_CHROMEOS)
#include <utility>
#include "ash/constants/ash_switches.h"
#include "base/metrics/histogram_macros.h"
#include "chromeos/ash/components/settings/cros_settings.h"
#include "chromeos/ash/components/settings/cros_settings_names.h"
#include "chromeos/dbus/constants/dbus_switches.h"
#include "components/permissions/permission_request.h"
#include "components/permissions/permission_uma_util.h"
#include "components/permissions/request_type.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/user_prefs/user_prefs.h"
#endif
#if !(BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_WIN) || BUILDFLAG(IS_CHROMEOS))
#error This file currently only supports Chrome OS, Android and Windows.
#endif
ProtectedMediaIdentifierPermissionContext::
ProtectedMediaIdentifierPermissionContext(
content::BrowserContext* browser_context)
: permissions::ContentSettingPermissionContextBase(
browser_context,
ContentSettingsType::PROTECTED_MEDIA_IDENTIFIER,
network::mojom::PermissionsPolicyFeature::kEncryptedMedia) {}
ProtectedMediaIdentifierPermissionContext::
~ProtectedMediaIdentifierPermissionContext() = default;
ContentSetting
ProtectedMediaIdentifierPermissionContext::GetContentSettingStatusInternal(
content::RenderFrameHost* render_frame_host,
const GURL& requesting_origin,
const GURL& embedding_origin) const {
DVLOG(1) << __func__ << ": (" << requesting_origin.spec() << ", "
<< embedding_origin.spec() << ")";
if (!requesting_origin.is_valid() || !embedding_origin.is_valid() ||
!IsProtectedMediaIdentifierEnabled(
Profile::FromBrowserContext(browser_context()))) {
return CONTENT_SETTING_BLOCK;
}
ContentSetting content_setting = permissions::
ContentSettingPermissionContextBase::GetContentSettingStatusInternal(
render_frame_host, requesting_origin, embedding_origin);
DCHECK(content_setting == CONTENT_SETTING_ALLOW ||
#if BUILDFLAG(IS_ANDROID)
content_setting == CONTENT_SETTING_ASK ||
#endif
content_setting == CONTENT_SETTING_BLOCK);
// For automated testing of protected content - having a prompt that
// requires user intervention is problematic. If the domain has been
// allowlisted as safe - suppress the request and allow.
if (content_setting != CONTENT_SETTING_ALLOW &&
IsOriginAllowed(requesting_origin)) {
content_setting = CONTENT_SETTING_ALLOW;
}
return content_setting;
}
bool ProtectedMediaIdentifierPermissionContext::IsOriginAllowed(
const GURL& origin) {
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
const std::string allowlist = command_line.GetSwitchValueASCII(
switches::kUnsafelyAllowProtectedMediaIdentifierForDomain);
for (const std::string& domain : base::SplitString(
allowlist, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY)) {
if (origin.DomainIs(domain)) {
return true;
}
}
return false;
}
void ProtectedMediaIdentifierPermissionContext::UpdateTabContext(
const permissions::PermissionRequestID& id,
const GURL& requesting_frame,
bool allowed) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// WebContents may have gone away.
content_settings::PageSpecificContentSettings* content_settings =
content_settings::PageSpecificContentSettings::GetForFrame(
id.global_render_frame_host_id());
if (content_settings) {
content_settings->OnProtectedMediaIdentifierPermissionSet(
requesting_frame.DeprecatedGetOriginAsURL(), allowed);
}
}
// TODO(xhwang): We should consolidate the "protected content" related pref
// across platforms.
// static
bool ProtectedMediaIdentifierPermissionContext::
IsProtectedMediaIdentifierEnabled(Profile* profile) {
#if BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_WIN)
// Identifier is not allowed in incognito or guest mode.
if (profile != nullptr &&
(profile->IsOffTheRecord() || profile->IsGuestSession())) {
DVLOG(1) << "Protected media identifier disabled in incognito or guest "
"mode.";
return false;
}
#if BUILDFLAG(IS_CHROMEOS)
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(chromeos::switches::kSystemDevMode) &&
!command_line->HasSwitch(switches::kAllowRAInDevMode)) {
DVLOG(1) << "Protected media identifier disabled in dev mode.";
return false;
}
// This could be disabled by the device policy or by a switch in content
// settings.
bool attestation_enabled = true;
if (!ash::CrosSettings::Get()->GetBoolean(
ash::kAttestationForContentProtectionEnabled, &attestation_enabled)) {
attestation_enabled = false;
}
if (!attestation_enabled) {
DVLOG(1) << "Protected media identifier disabled by the user or by device "
"policy.";
return false;
}
#endif // BUILDFLAG(IS_CHROMEOS)
#endif // BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_WIN)
return true;
}
|
