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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_LIBRBD_CRYPTO_LUKS_LOAD_REQUEST_H
#define CEPH_LIBRBD_CRYPTO_LUKS_LOAD_REQUEST_H
#include <string_view>
#include "include/rbd/librbd.hpp"
#include "librbd/ImageCtx.h"
#include "librbd/crypto/CryptoInterface.h"
#include "librbd/crypto/luks/Header.h"
namespace librbd {
class ImageCtx;
namespace crypto {
namespace luks {
// max header size in LUKS1/2 (excl. keyslots) is 4MB
const uint64_t MAXIMUM_HEADER_SIZE = 4 * 1024 * 1024;
// default header size in LUKS2 2 X 16KB + 1 X 256KB keyslot
const uint64_t DEFAULT_INITIAL_READ_SIZE = 288 * 1024;
template <typename I>
class LoadRequest {
public:
static LoadRequest* create(
I* image_ctx, encryption_format_t format,
std::string_view passphrase,
std::unique_ptr<CryptoInterface>* result_crypto,
std::string* detected_format_name,
Context* on_finish) {
return new LoadRequest(image_ctx, format, passphrase, result_crypto,
detected_format_name, on_finish);
}
LoadRequest(I* image_ctx, encryption_format_t format,
std::string_view passphrase,
std::unique_ptr<CryptoInterface>* result_crypto,
std::string* detected_format_name, Context* on_finish);
void send();
void finish(int r);
void set_initial_read_size(uint64_t read_size);
private:
I* m_image_ctx;
encryption_format_t m_format;
std::string_view m_passphrase;
Context* m_on_finish;
ceph::bufferlist m_bl;
std::unique_ptr<CryptoInterface>* m_result_crypto;
std::string* m_detected_format_name;
uint64_t m_initial_read_size;
Header m_header;
uint64_t m_offset;
void read(uint64_t end_offset, Context* on_finish);
bool handle_read(int r);
void handle_read_header(int r);
void handle_read_keyslots(int r);
void read_volume_key();
};
} // namespace luks
} // namespace crypto
} // namespace librbd
extern template class librbd::crypto::luks::LoadRequest<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_CRYPTO_LUKS_LOAD_REQUEST_H
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