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
|
// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_DEVICE_REAUTH_DEVICE_AUTHENTICATOR_COMMON_H_
#define COMPONENTS_DEVICE_REAUTH_DEVICE_AUTHENTICATOR_COMMON_H_
#include "base/memory/weak_ptr.h"
#include "components/device_reauth/device_authenticator.h"
#include "components/keyed_service/core/keyed_service.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
// Helper class which keeps the last good authentication timestamp such that it
// is common per profile.
class DeviceAuthenticatorProxy : public KeyedService {
public:
DeviceAuthenticatorProxy();
~DeviceAuthenticatorProxy() override;
absl::optional<base::TimeTicks> GetLastGoodAuthTimestamp() {
return last_good_auth_timestamp_;
}
void UpdateLastGoodAuthTimestamp() {
last_good_auth_timestamp_ = base::TimeTicks::Now();
}
base::WeakPtr<DeviceAuthenticatorProxy> GetWeakPtr() {
return weak_ptr_factory_.GetWeakPtr();
}
private:
// Time of last successful re-auth. nullopt if there hasn't been an auth yet.
absl::optional<base::TimeTicks> last_good_auth_timestamp_;
// Factory for weak pointers to this class.
base::WeakPtrFactory<DeviceAuthenticatorProxy> weak_ptr_factory_{this};
};
// Used to care of the auth validity period for biometric authenticators.
class DeviceAuthenticatorCommon : public device_reauth::DeviceAuthenticator {
public:
DeviceAuthenticatorCommon(DeviceAuthenticatorProxy* proxy,
base::TimeDelta auth_validity_period,
const std::string& auth_result_histogram);
protected:
~DeviceAuthenticatorCommon() override;
// Checks whether user needs to reauthenticate.
bool NeedsToAuthenticate() const;
// Records the authentication time if the authentication was successful.
void RecordAuthenticationTimeIfSuccessful(bool success);
// Records ReauthResult::kSkipped for the `auth_result_histogram_` metric.
void RecordAuthResultSkipped();
private:
// Used to obtain/update the last successful authentication timestamp.
base::WeakPtr<DeviceAuthenticatorProxy> device_authenticator_proxy_;
// Used to calculate how much time needs to pass before the user needs to
// authenticate again.
base::TimeDelta auth_validity_period_;
// Used to record histograms compatible with the device_reauth::ReauthResult
// enum.
std::string auth_result_histogram_;
};
#endif // COMPONENTS_DEVICE_REAUTH_DEVICE_AUTHENTICATOR_COMMON_H_
|
