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Diffstat (limited to 'lib/utils_storage_wrappers.h')
| -rw-r--r-- | lib/utils_storage_wrappers.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/lib/utils_storage_wrappers.h b/lib/utils_storage_wrappers.h new file mode 100644 index 0000000..ec55ec2 --- /dev/null +++ b/lib/utils_storage_wrappers.h @@ -0,0 +1,75 @@ +/* + * Generic wrapper for storage functions + * (experimental only) + * + * Copyright (C) 2018-2021, Ondrej Kozina + * + * This file is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This file is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this file; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef _UTILS_STORAGE_WRAPPERS_H +#define _UTILS_STORAGE_WRAPPERS_H + +#include <stdint.h> +#include <sys/types.h> + +struct crypt_storage_wrapper; +struct device; +struct volume_key; +struct crypt_device; + +#define DISABLE_USPACE (1 << 0) +#define DISABLE_KCAPI (1 << 1) +#define DISABLE_DMCRYPT (1 << 2) +#define OPEN_READONLY (1 << 3) +#define LARGE_IV (1 << 4) + +typedef enum { + NONE = 0, + USPACE, + DMCRYPT +} crypt_storage_wrapper_type; + +int crypt_storage_wrapper_init(struct crypt_device *cd, + struct crypt_storage_wrapper **cw, + struct device *device, + uint64_t data_offset, + uint64_t iv_start, + int sector_size, + const char *cipher, + struct volume_key *vk, + uint32_t flags); + +void crypt_storage_wrapper_destroy(struct crypt_storage_wrapper *cw); + +/* !!! when doing 'read' or 'write' all offset values are RELATIVE to data_offset !!! */ +ssize_t crypt_storage_wrapper_read(struct crypt_storage_wrapper *cw, + off_t offset, void *buffer, size_t buffer_length); +ssize_t crypt_storage_wrapper_read_decrypt(struct crypt_storage_wrapper *cw, + off_t offset, void *buffer, size_t buffer_length); +ssize_t crypt_storage_wrapper_decrypt(struct crypt_storage_wrapper *cw, + off_t offset, void *buffer, size_t buffer_length); + +ssize_t crypt_storage_wrapper_write(struct crypt_storage_wrapper *cw, + off_t offset, void *buffer, size_t buffer_length); +ssize_t crypt_storage_wrapper_encrypt_write(struct crypt_storage_wrapper *cw, + off_t offset, void *buffer, size_t buffer_length); +ssize_t crypt_storage_wrapper_encrypt(struct crypt_storage_wrapper *cw, + off_t offset, void *buffer, size_t buffer_length); + +int crypt_storage_wrapper_datasync(const struct crypt_storage_wrapper *cw); + +crypt_storage_wrapper_type crypt_storage_wrapper_get_type(const struct crypt_storage_wrapper *cw); +#endif |