lib/verity/verity.h

   1 /*
   2  * dm-verity volume handling
   3  *
   4  * Copyright (C) 2012, Red Hat, Inc. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #ifndef _VERITY_H
  21 #define _VERITY_H
  22
  23 #include <unistd.h>
  24 #include "config.h"
  25
  26 #define VERITY_MAX_HASH_TYPE 1
  27 #define VERITY_BLOCK_SIZE_OK(x) ((x) % 512 || (x) < 512 || \
  28                                 (x) > (512 * 1024) || (x) & ((x)-1))
  29
  30 struct crypt_device;
  31 struct crypt_params_verity;
  32
  33 int VERITY_read_sb(struct crypt_device *cd,
  34                    const char *device,
  35                    uint64_t sb_offset,
  36                    char **uuid,
  37                    struct crypt_params_verity *params);
  38
  39 int VERITY_write_sb(struct crypt_device *cd,
  40                    const char *device,
  41                    uint64_t sb_offset,
  42                    const char *uuid_string,
  43                    struct crypt_params_verity *params);
  44
  45 int VERITY_activate(struct crypt_device *cd,
  46                      const char *name,
  47                      const char *hash_device,
  48                      const char *root_hash,
  49                      size_t root_hash_size,
  50                      struct crypt_params_verity *verity_hdr,
  51                      uint32_t activation_flags);
  52
  53 int VERITY_verify(struct crypt_device *cd,
  54                 struct crypt_params_verity *verity_hdr,
  55                 const char *data_device,
  56                 const char *hash_device,
  57                 const char *root_hash,
  58                 size_t root_hash_size);
  59
  60 int VERITY_create(struct crypt_device *cd,
  61                   struct crypt_params_verity *verity_hdr,
  62                   const char *data_device,
  63                   const char *hash_device,
  64                   char *root_hash,
  65                   size_t root_hash_size);
  66
  67 uint64_t VERITY_hash_offset_block(struct crypt_params_verity *params);
  68
  69 int VERITY_UUID_generate(struct crypt_device *cd, char **uuid_string);
  70
  71 #endif