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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <cstddef>
#include <cstdint>
#include "mongo/crypto/fle_data_frames.h"
#include "mongo/shell/kms_gen.h"
#include "mongo/base/data_view.h"
#include "mongo/base/status.h"
#include "mongo/crypto/symmetric_key.h"
namespace mongo {
namespace crypto {
/**
* Constants used in the AEAD function
*/
constexpr size_t kFieldLevelEncryptionKeySize = 96;
constexpr size_t kAeadAesHmacKeySize = 64;
/**
* Returns the length of the ciphertext output given the plaintext length. Only for AEAD.
*/
size_t aeadCipherOutputLength(size_t plainTextLen);
/**
* Encrypts a dataframe object following the AEAD_AES_256_CBC_HMAC_SHA_512 encryption
* algorithm. Used for field level encryption.
*/
Status aeadEncryptDataFrame(FLEEncryptionFrame& dataframe);
/**
* Decrypts a dataframe object following the AEAD_AES_256_CBC_HMAC_SHA_512 decryption
* algorithm. Used for field level encryption.
*/
Status aeadDecryptDataFrame(FLEDecryptionFrame& dataframe);
/**
* Uses AEAD_AES_256_CBC_HMAC_SHA_512 encryption to encrypt a local datakey.
* Writes output to out.
*/
Status aeadEncryptLocalKMS(const SymmetricKey& key, ConstDataRange in, DataRange out);
/**
* Internal calls for the aeadEncryption algorithm. Only used for testing.
*/
Status aeadEncryptWithIV(ConstDataRange key,
ConstDataRange in,
ConstDataRange iv,
ConstDataRange associatedData,
ConstDataRange dataLenBitsEncodedStorage,
DataRange out);
/**
* Internal call for the aeadDecryption algorithm. Only used for testing.
*/
StatusWith<std::size_t> aeadDecrypt(const SymmetricKey& key,
ConstDataRange ciphertext,
ConstDataRange associatedData,
DataRange out);
/**
* Decrypts the cipherText using AEAD_AES_256_CBC_HMAC_SHA_512 decryption. Writes output
* to out.
*/
StatusWith<std::size_t> aeadDecryptLocalKMS(const SymmetricKey& key,
ConstDataRange cipher,
DataRange out);
} // namespace crypto
} // namespace mongo
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