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
|
// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_ATTESTATION_ATTESTATION_FLOW_ADAPTIVE_H_
#define CHROMEOS_ASH_COMPONENTS_ATTESTATION_ATTESTATION_FLOW_ADAPTIVE_H_
#include <memory>
#include <optional>
#include <string>
#include "base/component_export.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chromeos/ash/components/attestation/attestation_flow.h"
#include "chromeos/ash/components/attestation/attestation_flow_factory.h"
#include "chromeos/ash/components/attestation/attestation_flow_status_reporter.h"
#include "chromeos/ash/components/attestation/attestation_flow_type_decider.h"
#include "chromeos/ash/components/dbus/attestation/interface.pb.h"
#include "chromeos/ash/components/dbus/constants/attestation_constants.h"
#include "components/account_id/account_id.h"
namespace ash {
namespace attestation {
// An attestation flow that adaptively chooses the preferred attestation flow
// object to perform the attestation flow, and falls back to the legacy
// attestation if the default (platform-side integrated) attestation flow fails.
class COMPONENT_EXPORT(CHROMEOS_ASH_COMPONENTS_ATTESTATION)
AttestationFlowAdaptive : public AttestationFlow {
public:
explicit AttestationFlowAdaptive(std::unique_ptr<ServerProxy> server_proxy);
// A constructor that injects the type decider and the factory. Used for
// testing.
AttestationFlowAdaptive(
std::unique_ptr<ServerProxy> server_proxy,
std::unique_ptr<AttestationFlowTypeDecider> type_decider,
std::unique_ptr<AttestationFlowFactory> factory);
~AttestationFlowAdaptive() override;
void GetCertificate(
AttestationCertificateProfile certificate_profile,
const AccountId& account_id,
const std::string& request_origin,
bool force_new_key,
::attestation::KeyType key_crypto_type,
const std::string& key_name,
const std::optional<AttestationFlow::CertProfileSpecificData>&
profile_specific_data,
CertificateCallback callback) override;
private:
// The collection of parameters of `GetCertificate()` except for the callback.
struct GetCertificateParams;
// Called when the validity of the default attestation flow is checked.
// Performs actions for verbosity, e.g., logging, before invoking
// `StartGetCertificate()`.
void OnCheckAttestationFlowType(
const GetCertificateParams& params,
std::unique_ptr<AttestationFlowStatusReporter> status_reporter,
CertificateCallback callback,
bool is_integrated_flow_possible);
// Starts the default attestation flow if valid, otherwise just use the
// fallback flow.
void StartGetCertificate(
const GetCertificateParams& params,
std::unique_ptr<AttestationFlowStatusReporter> status_reporter,
CertificateCallback callback,
bool is_default_flow_valid);
// Initialize the factory if needed. This can be called multiple times. This
// function is designed to be idempotent.
void InitializeAttestationFlowFactory();
// Called when the default attestation flow returns the result. Runs
// `callback` if the flow succeeds; otherwise, try the fallback.
void OnGetCertificateWithDefaultFlow(
const GetCertificateParams& params,
std::unique_ptr<AttestationFlowStatusReporter> status_reporter,
CertificateCallback callback,
AttestationStatus status,
const std::string& pem_certificate_chain);
// Called when the fallback flow returns the result.
void OnGetCertificateWithFallbackFlow(
std::unique_ptr<AttestationFlowStatusReporter> status_reporter,
CertificateCallback callback,
AttestationStatus status,
const std::string& pem_certificate_chain);
// If `true`, the `InitializeAttestationFlowFactory()` performs no-ops.
bool is_attestation_flow_initialized_ = false;
// `ServerProxy` object passed during construction. Used by the type decider
// to gather proxy information, and the attestation flow factory to
// initialize.
std::unique_ptr<ServerProxy> server_proxy_;
// Owened by either `server_proxy_` or `attestation_flow_factory_`.
const raw_ptr<ServerProxy, DanglingUntriaged> raw_server_proxy_;
// `AttestationFlowTypeDecider` object that decides which attestation flow
// type we can use.
std::unique_ptr<AttestationFlowTypeDecider> attestation_flow_type_decider_;
// The factory that creates the attestation flow objects.
std::unique_ptr<AttestationFlowFactory> attestation_flow_factory_;
base::WeakPtrFactory<AttestationFlowAdaptive> weak_factory_{this};
};
} // namespace attestation
} // namespace ash
#endif // CHROMEOS_ASH_COMPONENTS_ATTESTATION_ATTESTATION_FLOW_ADAPTIVE_H_
|
