openkylin
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cryptsetup
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cryptsetup/lib/internal.h

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/*
* libcryptsetup - cryptsetup library internal
*
* Copyright (C) 2004 Jana Saout <jana@saout.de>
* Copyright (C) 2004-2007 Clemens Fruhwirth <clemens@endorphin.org>
* Copyright (C) 2009-2019 Red Hat, Inc. All rights reserved.
* Copyright (C) 2009-2019 Milan Broz
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef INTERNAL_H
#define INTERNAL_H
#include <stdint.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <inttypes.h>
#include "nls.h"
#include "bitops.h"
#include "utils_blkid.h"
#include "utils_crypt.h"
#include "utils_loop.h"
#include "utils_dm.h"
#include "utils_fips.h"
#include "utils_keyring.h"
#include "utils_io.h"
#include "crypto_backend.h"
#include "utils_storage_wrappers.h"
#include "libcryptsetup.h"
/* to silent gcc -Wcast-qual for const cast */
#define CONST_CAST(x) (x)(uintptr_t)
#define SHIFT_4K 12
#define SECTOR_SHIFT 9
#define SECTOR_SIZE (1 << SECTOR_SHIFT)
#define MAX_SECTOR_SIZE 4096 /* min page size among all platforms */
#define DEFAULT_DISK_ALIGNMENT 1048576 /* 1MiB */
#define DEFAULT_MEM_ALIGNMENT 4096
#define LOG_MAX_LEN 4096
#define MAX_DM_DEPS 32
#define CRYPT_SUBDEV "SUBDEV" /* prefix for sublayered devices underneath public crypt types */
#define at_least(a, b) ({ __typeof__(a) __at_least = (a); (__at_least >= (b))?__at_least:(b); })
#define MISALIGNED(a, b) ((a) & ((b) - 1))
#define MISALIGNED_4K(a) MISALIGNED((a), 1 << SHIFT_4K)
#define MISALIGNED_512(a) MISALIGNED((a), 1 << SECTOR_SHIFT)
#define NOTPOW2(a) MISALIGNED((a), (a))
#ifndef ARRAY_SIZE
# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#endif
#define MOVE_REF(x, y) \
do { \
typeof (x) *_px = &(x), *_py = &(y); \
*_px = *_py; \
*_py = NULL; \
} while (0)
struct crypt_device;
struct luks2_reenc_context;
struct volume_key {
int id;
size_t keylength;
const char *key_description;
struct volume_key *next;
char key[];
};
struct volume_key *crypt_alloc_volume_key(size_t keylength, const char *key);
struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, size_t keylength);
void crypt_free_volume_key(struct volume_key *vk);
int crypt_volume_key_set_description(struct volume_key *key, const char *key_description);
void crypt_volume_key_set_id(struct volume_key *vk, int id);
int crypt_volume_key_get_id(const struct volume_key *vk);
void crypt_volume_key_add_next(struct volume_key **vks, struct volume_key *vk);
struct volume_key *crypt_volume_key_next(struct volume_key *vk);
struct volume_key *crypt_volume_key_by_id(struct volume_key *vk, int id);
struct crypt_pbkdf_type *crypt_get_pbkdf(struct crypt_device *cd);
int init_pbkdf_type(struct crypt_device *cd,
const struct crypt_pbkdf_type *pbkdf,
const char *dev_type);
int verify_pbkdf_params(struct crypt_device *cd,
const struct crypt_pbkdf_type *pbkdf);
int crypt_benchmark_pbkdf_internal(struct crypt_device *cd,
struct crypt_pbkdf_type *pbkdf,
size_t volume_key_size);
const char *crypt_get_cipher_spec(struct crypt_device *cd);
/* Device backend */
struct device;
int device_alloc(struct crypt_device *cd, struct device **device, const char *path);
int device_alloc_no_check(struct device **device, const char *path);
void device_close(struct crypt_device *cd, struct device *device);
void device_free(struct crypt_device *cd, struct device *device);
const char *device_path(const struct device *device);
const char *device_dm_name(const struct device *device);
const char *device_block_path(const struct device *device);
void device_topology_alignment(struct crypt_device *cd,
struct device *device,
unsigned long *required_alignment, /* bytes */
unsigned long *alignment_offset, /* bytes */
unsigned long default_alignment);
size_t device_block_size(struct crypt_device *cd, struct device *device);
int device_read_ahead(struct device *device, uint32_t *read_ahead);
int device_size(struct device *device, uint64_t *size);
int device_open(struct crypt_device *cd, struct device *device, int flags);
int device_open_excl(struct crypt_device *cd, struct device *device, int flags);
void device_release_excl(struct crypt_device *cd, struct device *device);
void device_disable_direct_io(struct device *device);
int device_is_identical(struct device *device1, struct device *device2);
int device_is_rotational(struct device *device);
size_t device_alignment(struct device *device);
int device_direct_io(const struct device *device);
int device_fallocate(struct device *device, uint64_t size);
void device_sync(struct crypt_device *cd, struct device *device);
int device_check_size(struct crypt_device *cd,
struct device *device,
uint64_t req_offset, int falloc);
int device_open_locked(struct crypt_device *cd, struct device *device, int flags);
int device_read_lock(struct crypt_device *cd, struct device *device);
int device_write_lock(struct crypt_device *cd, struct device *device);
void device_read_unlock(struct crypt_device *cd, struct device *device);
void device_write_unlock(struct crypt_device *cd, struct device *device);
bool device_is_locked(struct device *device);
enum devcheck { DEV_OK = 0, DEV_EXCL = 1 };
int device_check_access(struct crypt_device *cd,
struct device *device,
enum devcheck device_check);
int device_block_adjust(struct crypt_device *cd,
struct device *device,
enum devcheck device_check,
uint64_t device_offset,
uint64_t *size,
uint32_t *flags);
size_t size_round_up(size_t size, size_t block);
int create_or_reload_device(struct crypt_device *cd, const char *name,
const char *type, struct crypt_dm_active_device *dmd);
int create_or_reload_device_with_integrity(struct crypt_device *cd, const char *name,
const char *type, struct crypt_dm_active_device *dmd,
struct crypt_dm_active_device *dmdi);
/* Receive backend devices from context helpers */
struct device *crypt_metadata_device(struct crypt_device *cd);
struct device *crypt_data_device(struct crypt_device *cd);
int crypt_confirm(struct crypt_device *cd, const char *msg);
char *crypt_lookup_dev(const char *dev_id);
int crypt_dev_is_rotational(int major, int minor);
int crypt_dev_is_partition(const char *dev_path);
char *crypt_get_partition_device(const char *dev_path, uint64_t offset, uint64_t size);
char *crypt_get_base_device(const char *dev_path);
uint64_t crypt_dev_partition_offset(const char *dev_path);
int lookup_by_disk_id(const char *dm_uuid);
int lookup_by_sysfs_uuid_field(const char *dm_uuid, size_t max_len);
int crypt_uuid_cmp(const char *dm_uuid, const char *hdr_uuid);
size_t crypt_getpagesize(void);
unsigned crypt_cpusonline(void);
uint64_t crypt_getphysmemory_kb(void);
int init_crypto(struct crypt_device *ctx);
void logger(struct crypt_device *cd, int level, const char *file, int line, const char *format, ...) __attribute__ ((format (printf, 5, 6)));
#define log_dbg(c, x...) logger(c, CRYPT_LOG_DEBUG, __FILE__, __LINE__, x)
#define log_std(c, x...) logger(c, CRYPT_LOG_NORMAL, __FILE__, __LINE__, x)
#define log_verbose(c, x...) logger(c, CRYPT_LOG_VERBOSE, __FILE__, __LINE__, x)
#define log_err(c, x...) logger(c, CRYPT_LOG_ERROR, __FILE__, __LINE__, x)
int crypt_get_debug_level(void);
int crypt_memlock_inc(struct crypt_device *ctx);
int crypt_memlock_dec(struct crypt_device *ctx);
int crypt_metadata_locking_enabled(void);
int crypt_random_init(struct crypt_device *ctx);
int crypt_random_get(struct crypt_device *ctx, char *buf, size_t len, int quality);
void crypt_random_exit(void);
int crypt_random_default_key_rng(void);
int crypt_plain_hash(struct crypt_device *cd,
const char *hash_name,
char *key, size_t key_size,
const char *passphrase, size_t passphrase_size);
int PLAIN_activate(struct crypt_device *cd,
const char *name,
struct volume_key *vk,
uint64_t size,
uint32_t flags);
void *crypt_get_hdr(struct crypt_device *cd, const char *type);
void crypt_set_reenc_context(struct crypt_device *cd, struct luks2_reenc_context *rh);
struct luks2_reenc_context *crypt_get_reenc_context(struct crypt_device *cd);
int onlyLUKS2(struct crypt_device *cd);
int onlyLUKS2mask(struct crypt_device *cd, uint32_t mask);
int crypt_wipe_device(struct crypt_device *cd,
struct device *device,
crypt_wipe_pattern pattern,
uint64_t offset,
uint64_t length,
size_t wipe_block_size,
int (*progress)(uint64_t size, uint64_t offset, void *usrptr),
void *usrptr);
/* Internal integrity helpers */
const char *crypt_get_integrity(struct crypt_device *cd);
int crypt_get_integrity_key_size(struct crypt_device *cd);
int crypt_get_integrity_tag_size(struct crypt_device *cd);
int crypt_key_in_keyring(struct crypt_device *cd);
void crypt_set_key_in_keyring(struct crypt_device *cd, unsigned key_in_keyring);
int crypt_volume_key_load_in_keyring(struct crypt_device *cd, struct volume_key *vk);
int crypt_use_keyring_for_vk(struct crypt_device *cd);
void crypt_drop_keyring_key_by_description(struct crypt_device *cd, const char *key_description, key_type_t ktype);
void crypt_drop_keyring_key(struct crypt_device *cd, struct volume_key *vks);
static inline uint64_t version(uint16_t major, uint16_t minor, uint16_t patch, uint16_t release)
{
return (uint64_t)release | ((uint64_t)patch << 16) | ((uint64_t)minor << 32) | ((uint64_t)major << 48);
}
int kernel_version(uint64_t *kversion);
int crypt_serialize_lock(struct crypt_device *cd);
void crypt_serialize_unlock(struct crypt_device *cd);
bool crypt_string_in(const char *str, char **list, size_t list_size);
int crypt_strcmp(const char *a, const char *b);
int crypt_compare_dm_devices(struct crypt_device *cd,
const struct crypt_dm_active_device *src,
const struct crypt_dm_active_device *tgt);
static inline void *crypt_zalloc(size_t size) { return calloc(1, size); }
#endif /* INTERNAL_H */
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