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
|
// 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 COMPONENTS_SYNC_TEST_FAKE_CRYPTOGRAPHER_H_
#define COMPONENTS_SYNC_TEST_FAKE_CRYPTOGRAPHER_H_
#include <memory>
#include <set>
#include <string>
#include <vector>
#include "base/notreached.h"
#include "components/sync/engine/nigori/cryptographer.h"
namespace syncer {
// An implementation of Cryptographer that encrypts data by trivially combining
// the input with the encryption key identifier. Multiple keys can be made
// available to the class via AddEncryptionKey(), and data encrypted with any
// of the available keys can be decrypted. The concept of "key name" is simply
// the string identifier used when adding the key.
class FakeCryptographer : public Cryptographer {
public:
static std::unique_ptr<FakeCryptographer> FromSingleDefaultKey(
const std::string& key_name);
FakeCryptographer();
~FakeCryptographer() override;
FakeCryptographer(const FakeCryptographer&) = delete;
FakeCryptographer& operator=(const FakeCryptographer&) = delete;
// `key_name` is a string able to identify the key consistently. It must not
// be empty.
void AddEncryptionKey(const std::string& key_name);
// `key_name` must have been previously added. Once this is called, `key_name`
// will be the return value of GetDefaultEncryptionKeyName();
void SelectDefaultEncryptionKey(const std::string& key_name);
void ClearDefaultEncryptionKey();
const CrossUserSharingPublicPrivateKeyPair& GetCrossUserSharingKeyPair(
uint32_t version) const;
// Cryptographer implementation.
bool CanEncrypt() const override;
bool CanDecrypt(const sync_pb::EncryptedData& encrypted) const override;
std::string GetDefaultEncryptionKeyName() const override;
bool EncryptString(const std::string& decrypted,
sync_pb::EncryptedData* encrypted) const override;
bool DecryptToString(const sync_pb::EncryptedData& encrypted,
std::string* decrypted) const override;
std::optional<std::vector<uint8_t>> AuthEncryptForCrossUserSharing(
base::span<const uint8_t> plaintext,
base::span<const uint8_t> recipient_public_key) const override;
std::optional<std::vector<uint8_t>> AuthDecryptForCrossUserSharing(
base::span<const uint8_t> encrypted_data,
base::span<const uint8_t> sender_public_key,
const uint32_t recipient_key_version) const override;
private:
std::set<std::string> known_key_names_;
// The state with no default key is encoded with an empty string.
std::string default_key_name_;
CrossUserSharingPublicPrivateKeyPair cross_user_sharing_key_pair_ =
CrossUserSharingPublicPrivateKeyPair::GenerateNewKeyPair();
};
} // namespace syncer
#endif // COMPONENTS_SYNC_TEST_FAKE_CRYPTOGRAPHER_H_
|
