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.
7 * Copyright (C) 2009-2012, Milan Broz
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
37 #include "utils_crypt.h"
38 #include "utils_loop.h"
40 #include "utils_fips.h"
41 #include "crypto_backend.h"
43 #include "libcryptsetup.h"
45 /* to silent gcc -Wcast-qual for const cast */
46 #define CONST_CAST(x) (x)(uintptr_t)
48 #define SECTOR_SHIFT 9
49 #define SECTOR_SIZE (1 << SECTOR_SHIFT)
50 #define DEFAULT_DISK_ALIGNMENT 1048576 /* 1MiB */
51 #define DEFAULT_MEM_ALIGNMENT 4096
52 #define MAX_ERROR_LENGTH 512
54 #define at_least(a, b) ({ __typeof__(a) __at_least = (a); (__at_least >= (b))?__at_least:(b); })
63 struct volume_key *crypt_alloc_volume_key(unsigned keylength, const char *key);
64 struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, unsigned keylength);
65 void crypt_free_volume_key(struct volume_key *vk);
69 int device_alloc(struct device **device, const char *path);
70 void device_free(struct device *device);
71 const char *device_path(const struct device *device);
72 const char *device_block_path(const struct device *device);
73 void device_topology_alignment(struct device *device,
74 unsigned long *required_alignment, /* bytes */
75 unsigned long *alignment_offset, /* bytes */
76 unsigned long default_alignment);
77 int device_block_size(struct device *device);
78 int device_read_ahead(struct device *device, uint32_t *read_ahead);
79 int device_size(struct device *device, uint64_t *size);
81 enum devcheck { DEV_OK = 0, DEV_EXCL = 1, DEV_SHARED = 2 };
82 int device_block_adjust(struct crypt_device *cd,
83 struct device *device,
84 enum devcheck device_check,
85 uint64_t device_offset,
88 size_t size_round_up(size_t size, unsigned int block);
90 /* Receive backend devices from context helpers */
91 struct device *crypt_metadata_device(struct crypt_device *cd);
92 struct device *crypt_data_device(struct crypt_device *cd);
94 int crypt_confirm(struct crypt_device *cd, const char *msg);
96 char *crypt_lookup_dev(const char *dev_id);
97 int crypt_sysfs_get_rotational(int major, int minor, int *rotational);
99 ssize_t write_blockwise(int fd, int bsize, void *buf, size_t count);
100 ssize_t read_blockwise(int fd, int bsize, void *_buf, size_t count);
101 ssize_t write_lseek_blockwise(int fd, int bsize, char *buf, size_t count, off_t offset);
103 unsigned crypt_getpagesize(void);
104 int init_crypto(struct crypt_device *ctx);
106 void logger(struct crypt_device *cd, int class, const char *file, int line, const char *format, ...);
107 #define log_dbg(x...) logger(NULL, CRYPT_LOG_DEBUG, __FILE__, __LINE__, x)
108 #define log_std(c, x...) logger(c, CRYPT_LOG_NORMAL, __FILE__, __LINE__, x)
109 #define log_verbose(c, x...) logger(c, CRYPT_LOG_VERBOSE, __FILE__, __LINE__, x)
110 #define log_err(c, x...) logger(c, CRYPT_LOG_ERROR, __FILE__, __LINE__, x)
112 int crypt_get_debug_level(void);
114 int crypt_memlock_inc(struct crypt_device *ctx);
115 int crypt_memlock_dec(struct crypt_device *ctx);
117 int crypt_random_init(struct crypt_device *ctx);
118 int crypt_random_get(struct crypt_device *ctx, char *buf, size_t len, int quality);
119 void crypt_random_exit(void);
120 int crypt_random_default_key_rng(void);
122 int crypt_plain_hash(struct crypt_device *ctx,
123 const char *hash_name,
124 char *key, size_t key_size,
125 const char *passphrase, size_t passphrase_size);
126 int PLAIN_activate(struct crypt_device *cd,
128 struct volume_key *vk,
133 * Different methods used to erase sensitive data concerning
134 * either encrypted payload area or master key inside keyslot
138 CRYPT_WIPE_ZERO, /**< overwrite area using zero blocks */
139 CRYPT_WIPE_DISK, /**< erase disk (using Gutmann method if it is rotational disk)*/
140 CRYPT_WIPE_SSD, /**< erase solid state disk (random write) */
141 CRYPT_WIPE_RANDOM /**< overwrite area using some up to now unspecified
142 * random algorithm */
145 int crypt_wipe(struct device *device,
148 crypt_wipe_type type,
151 #endif /* INTERNAL_H */