2 * libcryptsetup - cryptsetup library internal
4 * Copyright (C) 2004, Christophe Saout <christophe@saout.de>
5 * Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org>
6 * Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
35 #include "utils_crypt.h"
36 #include "utils_loop.h"
38 #include "utils_fips.h"
39 #include "crypto_backend.h"
41 #include "libcryptsetup.h"
43 /* to silent gcc -Wcast-qual for const cast */
44 #define CONST_CAST(x) (x)(uintptr_t)
46 #define SECTOR_SHIFT 9
47 #define SECTOR_SIZE (1 << SECTOR_SHIFT)
48 #define DEFAULT_DISK_ALIGNMENT 1048576 /* 1MiB */
49 #define DEFAULT_MEM_ALIGNMENT 4096
50 #define MAX_ERROR_LENGTH 512
52 #define at_least(a, b) ({ __typeof__(a) __at_least = (a); (__at_least >= (b))?__at_least:(b); })
61 struct volume_key *crypt_alloc_volume_key(unsigned keylength, const char *key);
62 struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, unsigned keylength);
63 void crypt_free_volume_key(struct volume_key *vk);
65 int crypt_confirm(struct crypt_device *cd, const char *msg);
67 char *crypt_lookup_dev(const char *dev_id);
68 int crypt_sysfs_check_crypt_segment(const char *device, uint64_t offset, uint64_t size);
69 int crypt_sysfs_get_rotational(int major, int minor, int *rotational);
71 int sector_size_for_device(const char *device);
72 int device_read_ahead(const char *dev, uint32_t *read_ahead);
73 ssize_t write_blockwise(int fd, void *buf, size_t count);
74 ssize_t read_blockwise(int fd, void *_buf, size_t count);
75 ssize_t write_lseek_blockwise(int fd, char *buf, size_t count, off_t offset);
76 int device_ready(struct crypt_device *cd, const char *device, int mode);
77 int device_size(const char *device, uint64_t *size);
79 int crypt_getpagesize(void);
81 enum devcheck { DEV_OK = 0, DEV_EXCL = 1, DEV_SHARED = 2 };
82 int device_check_and_adjust(struct crypt_device *cd,
84 enum devcheck device_check,
89 void logger(struct crypt_device *cd, int class, const char *file, int line, const char *format, ...);
90 #define log_dbg(x...) logger(NULL, CRYPT_LOG_DEBUG, __FILE__, __LINE__, x)
91 #define log_std(c, x...) logger(c, CRYPT_LOG_NORMAL, __FILE__, __LINE__, x)
92 #define log_verbose(c, x...) logger(c, CRYPT_LOG_VERBOSE, __FILE__, __LINE__, x)
93 #define log_err(c, x...) logger(c, CRYPT_LOG_ERROR, __FILE__, __LINE__, x)
95 int crypt_get_debug_level(void);
96 void debug_processes_using_device(const char *name);
98 int crypt_memlock_inc(struct crypt_device *ctx);
99 int crypt_memlock_dec(struct crypt_device *ctx);
101 void get_topology_alignment(const char *device,
102 unsigned long *required_alignment, /* bytes */
103 unsigned long *alignment_offset, /* bytes */
104 unsigned long default_alignment);
106 int crypt_random_init(struct crypt_device *ctx);
107 int crypt_random_get(struct crypt_device *ctx, char *buf, size_t len, int quality);
108 void crypt_random_exit(void);
109 int crypt_random_default_key_rng(void);
111 int crypt_plain_hash(struct crypt_device *ctx,
112 const char *hash_name,
113 char *key, size_t key_size,
114 const char *passphrase, size_t passphrase_size);
115 int PLAIN_activate(struct crypt_device *cd,
117 struct volume_key *vk,
122 * Different methods used to erase sensitive data concerning
123 * either encrypted payload area or master key inside keyslot
127 CRYPT_WIPE_ZERO, /**< overwrite area using zero blocks */
128 CRYPT_WIPE_DISK, /**< erase disk (using Gutmann method if it is rotational disk)*/
129 CRYPT_WIPE_SSD, /**< erase solid state disk (random write) */
130 CRYPT_WIPE_RANDOM /**< overwrite area using some up to now unspecified
131 * random algorithm */
134 int crypt_wipe(const char *device,
137 crypt_wipe_type type,
140 #endif /* INTERNAL_H */