62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
// SPDX-License-Identifier: LGPL-2.1-or-later
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/*
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* Generic wrapper for storage functions
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* (experimental only)
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*
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* Copyright (C) 2018-2024 Ondrej Kozina
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*/
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#ifndef _UTILS_STORAGE_WRAPPERS_H
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#define _UTILS_STORAGE_WRAPPERS_H
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#include <stdint.h>
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#include <sys/types.h>
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struct crypt_storage_wrapper;
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struct device;
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struct volume_key;
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struct crypt_device;
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#define DISABLE_USPACE (1 << 0)
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#define DISABLE_KCAPI (1 << 1)
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#define DISABLE_DMCRYPT (1 << 2)
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#define OPEN_READONLY (1 << 3)
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#define LARGE_IV (1 << 4)
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typedef enum {
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NONE = 0,
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USPACE,
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DMCRYPT
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} crypt_storage_wrapper_type;
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int crypt_storage_wrapper_init(struct crypt_device *cd,
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struct crypt_storage_wrapper **cw,
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struct device *device,
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uint64_t data_offset,
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uint64_t iv_start,
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int sector_size,
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const char *cipher,
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struct volume_key *vk,
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uint32_t flags);
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void crypt_storage_wrapper_destroy(struct crypt_storage_wrapper *cw);
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/* !!! when doing 'read' or 'write' all offset values are RELATIVE to data_offset !!! */
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ssize_t crypt_storage_wrapper_read(struct crypt_storage_wrapper *cw,
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off_t offset, void *buffer, size_t buffer_length);
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ssize_t crypt_storage_wrapper_read_decrypt(struct crypt_storage_wrapper *cw,
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off_t offset, void *buffer, size_t buffer_length);
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ssize_t crypt_storage_wrapper_decrypt(struct crypt_storage_wrapper *cw,
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off_t offset, void *buffer, size_t buffer_length);
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ssize_t crypt_storage_wrapper_write(struct crypt_storage_wrapper *cw,
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off_t offset, void *buffer, size_t buffer_length);
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ssize_t crypt_storage_wrapper_encrypt_write(struct crypt_storage_wrapper *cw,
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off_t offset, void *buffer, size_t buffer_length);
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ssize_t crypt_storage_wrapper_encrypt(struct crypt_storage_wrapper *cw,
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off_t offset, void *buffer, size_t buffer_length);
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int crypt_storage_wrapper_datasync(const struct crypt_storage_wrapper *cw);
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crypt_storage_wrapper_type crypt_storage_wrapper_get_type(const struct crypt_storage_wrapper *cw);
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#endif
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