14 #include "utils_crypt.h"
15 #include "utils_loop.h"
18 /* to silent gcc -Wcast-qual for const cast */
19 #define CONST_CAST(x) (x)(uintptr_t)
21 #define SECTOR_SHIFT 9
22 #define SECTOR_SIZE (1 << SECTOR_SHIFT)
23 #define DEFAULT_DISK_ALIGNMENT 1048576 /* 1MiB */
24 #define DEFAULT_MEM_ALIGNMENT 4096
26 /* private struct crypt_options flags */
28 #define CRYPT_FLAG_FREE_DEVICE (1 << 24)
29 #define CRYPT_FLAG_FREE_CIPHER (1 << 25)
31 #define CRYPT_FLAG_PRIVATE_MASK ((unsigned int)-1 << 24)
33 #define at_least(a, b) ({ __typeof__(a) __at_least = (a); (__at_least >= (b))?__at_least:(b); })
42 struct volume_key *crypt_alloc_volume_key(unsigned keylength, const char *key);
43 struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, unsigned keylength);
44 void crypt_free_volume_key(struct volume_key *vk);
46 int crypt_confirm(struct crypt_device *cd, const char *msg);
48 void set_error_va(const char *fmt, va_list va);
49 void set_error(const char *fmt, ...);
50 const char *get_error(void);
52 char *crypt_lookup_dev(const char *dev_id);
53 int crypt_sysfs_check_crypt_segment(const char *device, uint64_t offset, uint64_t size);
54 int crypt_sysfs_get_rotational(int major, int minor, int *rotational);
56 int sector_size_for_device(const char *device);
57 int device_read_ahead(const char *dev, uint32_t *read_ahead);
58 ssize_t write_blockwise(int fd, void *buf, size_t count);
59 ssize_t read_blockwise(int fd, void *_buf, size_t count);
60 ssize_t write_lseek_blockwise(int fd, char *buf, size_t count, off_t offset);
61 int device_ready(struct crypt_device *cd, const char *device, int mode);
62 int device_size(const char *device, uint64_t *size);
64 enum devcheck { DEV_OK = 0, DEV_EXCL = 1, DEV_SHARED = 2 };
65 int device_check_and_adjust(struct crypt_device *cd,
67 enum devcheck device_check,
72 void logger(struct crypt_device *cd, int class, const char *file, int line, const char *format, ...);
73 #define log_dbg(x...) logger(NULL, CRYPT_LOG_DEBUG, __FILE__, __LINE__, x)
74 #define log_std(c, x...) logger(c, CRYPT_LOG_NORMAL, __FILE__, __LINE__, x)
75 #define log_verbose(c, x...) logger(c, CRYPT_LOG_VERBOSE, __FILE__, __LINE__, x)
76 #define log_err(c, x...) do { \
77 logger(c, CRYPT_LOG_ERROR, __FILE__, __LINE__, x); \
78 set_error(x); } while(0)
80 int crypt_get_debug_level(void);
81 void debug_processes_using_device(const char *name);
83 int crypt_memlock_inc(struct crypt_device *ctx);
84 int crypt_memlock_dec(struct crypt_device *ctx);
86 void get_topology_alignment(const char *device,
87 unsigned long *required_alignment, /* bytes */
88 unsigned long *alignment_offset, /* bytes */
89 unsigned long default_alignment);
91 enum { CRYPT_RND_NORMAL = 0, CRYPT_RND_KEY = 1 };
92 int crypt_random_init(struct crypt_device *ctx);
93 int crypt_random_get(struct crypt_device *ctx, char *buf, size_t len, int quality);
94 void crypt_random_exit(void);
95 int crypt_random_default_key_rng(void);
97 int crypt_plain_hash(struct crypt_device *ctx,
98 const char *hash_name,
99 char *key, size_t key_size,
100 const char *passphrase, size_t passphrase_size);
101 int PLAIN_activate(struct crypt_device *cd,
103 struct volume_key *vk,
108 * Different methods used to erase sensitive data concerning
109 * either encrypted payload area or master key inside keyslot
113 CRYPT_WIPE_ZERO, /**< overwrite area using zero blocks */
114 CRYPT_WIPE_DISK, /**< erase disk (using Gutmann method if it is rotational disk)*/
115 CRYPT_WIPE_SSD, /**< erase solid state disk (random write) */
116 CRYPT_WIPE_RANDOM /**< overwrite area using some up to now unspecified
117 * random algorithm */
120 int crypt_wipe(const char *device,
123 crypt_wipe_type type,
126 #endif /* INTERNAL_H */