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
|
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
#pragma once
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "parquet/encryption/encryption.h"
#include "parquet/schema.h"
namespace parquet {
namespace encryption {
class AesEncryptor;
} // namespace encryption
class FileEncryptionProperties;
class ColumnEncryptionProperties;
class PARQUET_EXPORT Encryptor {
public:
Encryptor(encryption::AesEncryptor* aes_encryptor, const std::string& key,
const std::string& file_aad, const std::string& aad,
::arrow::MemoryPool* pool);
const std::string& file_aad() { return file_aad_; }
void UpdateAad(const std::string& aad) { aad_ = aad; }
::arrow::MemoryPool* pool() { return pool_; }
int CiphertextSizeDelta();
int Encrypt(const uint8_t* plaintext, int plaintext_len, uint8_t* ciphertext);
bool EncryptColumnMetaData(
bool encrypted_footer,
const std::shared_ptr<ColumnEncryptionProperties>& column_encryption_properties) {
// if column is not encrypted then do not encrypt the column metadata
if (!column_encryption_properties || !column_encryption_properties->is_encrypted())
return false;
// if plaintext footer then encrypt the column metadata
if (!encrypted_footer) return true;
// if column is not encrypted with footer key then encrypt the column metadata
return !column_encryption_properties->is_encrypted_with_footer_key();
}
private:
encryption::AesEncryptor* aes_encryptor_;
std::string key_;
std::string file_aad_;
std::string aad_;
::arrow::MemoryPool* pool_;
};
class InternalFileEncryptor {
public:
explicit InternalFileEncryptor(FileEncryptionProperties* properties,
::arrow::MemoryPool* pool);
std::shared_ptr<Encryptor> GetFooterEncryptor();
std::shared_ptr<Encryptor> GetFooterSigningEncryptor();
std::shared_ptr<Encryptor> GetColumnMetaEncryptor(const std::string& column_path);
std::shared_ptr<Encryptor> GetColumnDataEncryptor(const std::string& column_path);
void WipeOutEncryptionKeys();
private:
FileEncryptionProperties* properties_;
std::map<std::string, std::shared_ptr<Encryptor>> column_data_map_;
std::map<std::string, std::shared_ptr<Encryptor>> column_metadata_map_;
std::shared_ptr<Encryptor> footer_signing_encryptor_;
std::shared_ptr<Encryptor> footer_encryptor_;
std::vector<encryption::AesEncryptor*> all_encryptors_;
// Key must be 16, 24 or 32 bytes in length. Thus there could be up to three
// types of meta_encryptors and data_encryptors.
std::unique_ptr<encryption::AesEncryptor> meta_encryptor_[3];
std::unique_ptr<encryption::AesEncryptor> data_encryptor_[3];
::arrow::MemoryPool* pool_;
std::shared_ptr<Encryptor> GetColumnEncryptor(const std::string& column_path,
bool metadata);
encryption::AesEncryptor* GetMetaAesEncryptor(ParquetCipher::type algorithm,
size_t key_len);
encryption::AesEncryptor* GetDataAesEncryptor(ParquetCipher::type algorithm,
size_t key_len);
int MapKeyLenToEncryptorArrayIndex(int key_len);
};
} // namespace parquet
|
