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Diffstat (limited to 'src/librbd/crypto/luks/LoadRequest.h')
-rw-r--r-- | src/librbd/crypto/luks/LoadRequest.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/librbd/crypto/luks/LoadRequest.h b/src/librbd/crypto/luks/LoadRequest.h new file mode 100644 index 000000000..60ed9a4a4 --- /dev/null +++ b/src/librbd/crypto/luks/LoadRequest.h @@ -0,0 +1,71 @@ +// -*- 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 |