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// 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/schema.h"
namespace parquet {
namespace encryption {
class AesDecryptor;
class AesEncryptor;
} // namespace encryption
class FileDecryptionProperties;
class PARQUET_EXPORT Decryptor {
public:
Decryptor(encryption::AesDecryptor* decryptor, const std::string& key,
const std::string& file_aad, const std::string& aad,
::arrow::MemoryPool* pool);
const std::string& file_aad() const { return file_aad_; }
void UpdateAad(const std::string& aad) { aad_ = aad; }
::arrow::MemoryPool* pool() { return pool_; }
int CiphertextSizeDelta();
int Decrypt(const uint8_t* ciphertext, int ciphertext_len, uint8_t* plaintext);
private:
encryption::AesDecryptor* aes_decryptor_;
std::string key_;
std::string file_aad_;
std::string aad_;
::arrow::MemoryPool* pool_;
};
class InternalFileDecryptor {
public:
explicit InternalFileDecryptor(FileDecryptionProperties* properties,
const std::string& file_aad,
ParquetCipher::type algorithm,
const std::string& footer_key_metadata,
::arrow::MemoryPool* pool);
std::string& file_aad() { return file_aad_; }
std::string GetFooterKey();
ParquetCipher::type algorithm() { return algorithm_; }
std::string& footer_key_metadata() { return footer_key_metadata_; }
FileDecryptionProperties* properties() { return properties_; }
void WipeOutDecryptionKeys();
::arrow::MemoryPool* pool() { return pool_; }
std::shared_ptr<Decryptor> GetFooterDecryptor();
std::shared_ptr<Decryptor> GetFooterDecryptorForColumnMeta(const std::string& aad = "");
std::shared_ptr<Decryptor> GetFooterDecryptorForColumnData(const std::string& aad = "");
std::shared_ptr<Decryptor> GetColumnMetaDecryptor(
const std::string& column_path, const std::string& column_key_metadata,
const std::string& aad = "");
std::shared_ptr<Decryptor> GetColumnDataDecryptor(
const std::string& column_path, const std::string& column_key_metadata,
const std::string& aad = "");
private:
FileDecryptionProperties* properties_;
// Concatenation of aad_prefix (if exists) and aad_file_unique
std::string file_aad_;
std::map<std::string, std::shared_ptr<Decryptor>> column_data_map_;
std::map<std::string, std::shared_ptr<Decryptor>> column_metadata_map_;
std::shared_ptr<Decryptor> footer_metadata_decryptor_;
std::shared_ptr<Decryptor> footer_data_decryptor_;
ParquetCipher::type algorithm_;
std::string footer_key_metadata_;
std::vector<encryption::AesDecryptor*> all_decryptors_;
/// Key must be 16, 24 or 32 bytes in length. Thus there could be up to three
// types of meta_decryptors and data_decryptors.
std::unique_ptr<encryption::AesDecryptor> meta_decryptor_[3];
std::unique_ptr<encryption::AesDecryptor> data_decryptor_[3];
::arrow::MemoryPool* pool_;
std::shared_ptr<Decryptor> GetFooterDecryptor(const std::string& aad, bool metadata);
std::shared_ptr<Decryptor> GetColumnDecryptor(const std::string& column_path,
const std::string& column_key_metadata,
const std::string& aad,
bool metadata = false);
encryption::AesDecryptor* GetMetaAesDecryptor(size_t key_size);
encryption::AesDecryptor* GetDataAesDecryptor(size_t key_size);
int MapKeyLenToDecryptorArrayIndex(int key_len);
};
} // namespace parquet
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