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
|
// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/metrics/structured/key_data_prefs_delegate.h"
#include <optional>
#include <string_view>
#include <utility>
#include "base/check.h"
#include "base/logging.h"
#include "base/values.h"
#include "components/metrics/structured/lib/key_data.h"
#include "components/metrics/structured/lib/key_util.h"
#include "components/metrics/structured/lib/proto/key.pb.h"
#include "components/metrics/structured/project_validator.h"
#include "components/metrics/structured/structured_metrics_validator.h"
#include "components/prefs/scoped_user_pref_update.h"
namespace metrics::structured {
KeyDataPrefsDelegate::KeyDataPrefsDelegate(PrefService* local_state,
std::string_view pref_name)
: local_state_(local_state), pref_name_(pref_name) {
CHECK(local_state_);
CHECK(!pref_name_.empty());
LoadKeysFromPrefs();
}
KeyDataPrefsDelegate::~KeyDataPrefsDelegate() = default;
bool KeyDataPrefsDelegate::IsReady() const {
return true;
}
const KeyProto* KeyDataPrefsDelegate::GetKey(uint64_t project_name_hash) const {
CHECK(IsReady());
auto it = proto_.keys().find(project_name_hash);
if (it != proto_.keys().end()) {
return &it->second;
}
return nullptr;
}
void KeyDataPrefsDelegate::UpsertKey(uint64_t project_name_hash,
base::TimeDelta last_key_rotation,
base::TimeDelta key_rotation_period) {
KeyProto& key_proto = (*(proto_.mutable_keys()))[project_name_hash];
key_proto.set_key(util::GenerateNewKey());
key_proto.set_last_rotation(last_key_rotation.InDays());
key_proto.set_rotation_period(key_rotation_period.InDays());
UpdatePrefsByProject(project_name_hash, key_proto);
}
void KeyDataPrefsDelegate::Purge() {
// Clears in-memory keys.
proto_.mutable_keys()->clear();
// Clears persisted keys.
local_state_->ClearPref(pref_name_);
}
void KeyDataPrefsDelegate::LoadKeysFromPrefs() {
const base::Value::Dict& keys_pref = local_state_->GetDict(pref_name_);
// Use the validators to get the project name to project hash mapping.
const validator::Validators* validators = validator::Validators::Get();
auto* proto_keys = proto_.mutable_keys();
for (const auto [project_name, project_keys] : keys_pref) {
std::optional<const ProjectValidator*> project_validator =
validators->GetProjectValidator(project_name);
// Check if a project was found for the name.
if (!project_validator.has_value()) {
continue;
}
const uint64_t project_hash = (*project_validator)->project_hash();
const base::Value::Dict* value_dict = project_keys.GetIfDict();
if (!value_dict) {
LOG(ERROR) << "Key Pref value was expected to be a dict.";
continue;
}
std::optional<KeyProto> key_data =
util::CreateKeyProtoFromValue(*value_dict);
if (!key_data.has_value()) {
LOG(ERROR) << "Failed to convert pref value into key data.";
continue;
}
(*proto_keys)[project_hash] = *key_data;
}
}
void KeyDataPrefsDelegate::UpdatePrefsByProject(uint64_t project_name_hash,
const KeyProto& key_proto) {
ScopedDictPrefUpdate pref_updater(local_state_, pref_name_);
base::Value::Dict& dict = pref_updater.Get();
// Get the name of the project for |project_name_hash| to be used to store the
// keys in prefs.
const validator::Validators* validators = validator::Validators::Get();
std::optional<std::string_view> project_name =
validators->GetProjectName(project_name_hash);
if (!project_name.has_value()) {
LOG(ERROR) << "Attempting to store key for invalid project: "
<< project_name_hash;
return;
}
dict.Set(*project_name, util::CreateValueFromKeyProto(key_proto));
}
} // namespace metrics::structured
|
