| /* |
| * libcryptsetup - cryptsetup library internal |
| * |
| * Copyright (C) 2004, Jana Saout <jana@saout.de> |
| * Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org> |
| * Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved. |
| * Copyright (C) 2009-2012, 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 <unistd.h> |
| #include <inttypes.h> |
| |
| #include "nls.h" |
| #include "bitops.h" |
| #include "utils_crypt.h" |
| #include "utils_loop.h" |
| #include "utils_dm.h" |
| #include "utils_fips.h" |
| #include "crypto_backend.h" |
| |
| #include "libcryptsetup.h" |
| |
| /* to silent gcc -Wcast-qual for const cast */ |
| #define CONST_CAST(x) (x)(uintptr_t) |
| |
| #define SECTOR_SHIFT 9 |
| #define SECTOR_SIZE (1 << SECTOR_SHIFT) |
| #define DEFAULT_DISK_ALIGNMENT 1048576 /* 1MiB */ |
| #define DEFAULT_MEM_ALIGNMENT 4096 |
| #define MAX_ERROR_LENGTH 512 |
| |
| #define at_least(a, b) ({ __typeof__(a) __at_least = (a); (__at_least >= (b))?__at_least:(b); }) |
| |
| struct crypt_device; |
| |
| struct volume_key { |
| size_t keylength; |
| char key[]; |
| }; |
| |
| struct volume_key *crypt_alloc_volume_key(unsigned keylength, const char *key); |
| struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, unsigned keylength); |
| void crypt_free_volume_key(struct volume_key *vk); |
| |
| /* Device backend */ |
| struct device; |
| int device_alloc(struct device **device, const char *path); |
| void device_free(struct device *device); |
| const char *device_path(const struct device *device); |
| const char *device_block_path(const struct device *device); |
| void device_topology_alignment(struct device *device, |
| unsigned long *required_alignment, /* bytes */ |
| unsigned long *alignment_offset, /* bytes */ |
| unsigned long default_alignment); |
| int device_block_size(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 device *device, int flags); |
| |
| enum devcheck { DEV_OK = 0, DEV_EXCL = 1, DEV_SHARED = 2 }; |
| 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, unsigned int block); |
| |
| /* 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); |
| |
| ssize_t write_blockwise(int fd, int bsize, void *buf, size_t count); |
| ssize_t read_blockwise(int fd, int bsize, void *_buf, size_t count); |
| ssize_t write_lseek_blockwise(int fd, int bsize, char *buf, size_t count, off_t offset); |
| |
| unsigned crypt_getpagesize(void); |
| int init_crypto(struct crypt_device *ctx); |
| |
| void logger(struct crypt_device *cd, int class, const char *file, int line, const char *format, ...) __attribute__ ((format (printf, 5, 6))); |
| #define log_dbg(x...) logger(NULL, 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_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 *ctx, |
| 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); |
| |
| /** |
| * Different methods used to erase sensitive data concerning |
| * either encrypted payload area or master key inside keyslot |
| * area |
| */ |
| typedef enum { |
| CRYPT_WIPE_ZERO, /**< overwrite area using zero blocks */ |
| CRYPT_WIPE_DISK, /**< erase disk (using Gutmann method if it is rotational disk)*/ |
| CRYPT_WIPE_SSD, /**< erase solid state disk (random write) */ |
| CRYPT_WIPE_RANDOM /**< overwrite area using some up to now unspecified |
| * random algorithm */ |
| } crypt_wipe_type; |
| |
| int crypt_wipe(struct device *device, |
| uint64_t offset, |
| uint64_t sectors, |
| crypt_wipe_type type, |
| int flags); |
| |
| #endif /* INTERNAL_H */ |