ceph/src/librbd/crypto/luks/Header.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #ifndef CEPH_LIBRBD_CRYPTO_LUKS_HEADER_H
   5 #define CEPH_LIBRBD_CRYPTO_LUKS_HEADER_H
   6
   7 #include <libcryptsetup.h>
   8 #include "common/ceph_context.h"
   9 #include "include/buffer.h"
  10
  11 namespace librbd {
  12 namespace crypto {
  13 namespace luks {
  14
  15 class Header {
  16 public:
  17     Header(CephContext* cct);
  18     ~Header();
  19     int init();
  20
  21     int write(const ceph::bufferlist& bl);
  22     ssize_t read(ceph::bufferlist* bl);
  23
  24     int format(const char* type, const char* alg, const char* key,
  25                size_t key_size, const char* cipher_mode, uint32_t sector_size,
  26                uint32_t data_alignment, bool insecure_fast_mode);
  27     int add_keyslot(const char* passphrase, size_t passphrase_size);
  28     int load(const char* type);
  29     int read_volume_key(const char* passphrase, size_t passphrase_size,
  30                         char* volume_key, size_t* volume_key_size);
  31
  32     int get_sector_size();
  33     uint64_t get_data_offset();
  34     const char* get_cipher();
  35     const char* get_cipher_mode();
  36     const char* get_format_name();
  37
  38 private:
  39     void libcryptsetup_log(int level, const char* msg);
  40     static void libcryptsetup_log_wrapper(int level, const char* msg,
  41                                           void* header);
  42
  43     CephContext* m_cct;
  44     int m_fd;
  45     struct crypt_device *m_cd;
  46 };
  47
  48 } // namespace luks
  49 } // namespace crypto
  50 } // namespace librbd
  51
  52 #endif // CEPH_LIBRBD_CRYPTO_LUKS_HEADER_H