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Diffstat (limited to 'lib/internal.h')
| -rw-r--r-- | lib/internal.h | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/lib/internal.h b/lib/internal.h new file mode 100644 index 0000000..42a0c48 --- /dev/null +++ b/lib/internal.h @@ -0,0 +1,277 @@ +/* + * libcryptsetup - cryptsetup library internal + * + * Copyright (C) 2004 Jana Saout <jana@saout.de> + * Copyright (C) 2004-2007 Clemens Fruhwirth <clemens@endorphin.org> + * Copyright (C) 2009-2021 Red Hat, Inc. All rights reserved. + * Copyright (C) 2009-2021 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 <fcntl.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) + +#ifndef O_CLOEXEC +#define O_CLOEXEC 0 +#endif + +struct crypt_device; +struct luks2_reencrypt; + +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_luks2_reencrypt(struct crypt_device *cd, struct luks2_reencrypt *rh); +struct luks2_reencrypt *crypt_get_luks2_reencrypt(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); } + +static inline bool uint64_mult_overflow(uint64_t *u, uint64_t b, size_t size) +{ + *u = (uint64_t)b * size; + if ((uint64_t)(*u / size) != b) + return true; + return false; +} + +#endif /* INTERNAL_H */ |