-void set_error_va(const char *fmt, va_list va);
-void set_error(const char *fmt, ...);
-const char *get_error(void);
-void *safe_alloc(size_t size);
-void safe_free(void *data);
-void *safe_realloc(void *data, size_t size);
-char *safe_strdup(const char *s);
-
-struct hash_backend *get_hash_backend(const char *name);
-void put_hash_backend(struct hash_backend *backend);
-int hash(const char *backend_name, const char *hash_name,
- char *result, size_t size,
- const char *passphrase, size_t sizep);
-
-struct setup_backend *get_setup_backend(const char *name);
-void put_setup_backend(struct setup_backend *backend);
-
-void hexprint(char *d, int n);
-
-int sector_size_for_device(const char *device);
-ssize_t write_blockwise(int fd, const void *buf, size_t count);
-ssize_t read_blockwise(int fd, void *_buf, size_t count);
-ssize_t write_lseek_blockwise(int fd, const char *buf, size_t count, off_t offset);
-
-
-int get_key(char *prompt, char **key, unsigned int *passLen, int key_size,
- const char *key_file, int passphrase_fd, int timeout, int how2verify);
+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);
+
+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_sysfs_get_rotational(int major, int minor, int *rotational);
+
+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, ...);
+#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);