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#pragma once
/***
This file is part of systemd.
Copyright 2016 Lennart Poettering
systemd 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.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdbool.h>
#include "macro.h"
typedef struct DissectedImage DissectedImage;
typedef struct DissectedPartition DissectedPartition;
typedef struct DecryptedImage DecryptedImage;
struct DissectedPartition {
bool found:1;
bool rw:1;
int partno; /* -1 if there was no partition and the images contains a file system directly */
int architecture; /* Intended architecture: either native, secondary or unset (-1). */
sd_id128_t uuid; /* Partition entry UUID as reported by the GPT */
char *fstype;
char *node;
char *decrypted_node;
char *decrypted_fstype;
};
enum {
PARTITION_ROOT,
PARTITION_ROOT_SECONDARY, /* Secondary architecture */
PARTITION_HOME,
PARTITION_SRV,
PARTITION_ESP,
PARTITION_SWAP,
PARTITION_ROOT_VERITY, /* verity data for the PARTITION_ROOT partition */
PARTITION_ROOT_SECONDARY_VERITY, /* verity data for the PARTITION_ROOT_SECONDARY partition */
_PARTITION_DESIGNATOR_MAX,
_PARTITION_DESIGNATOR_INVALID = -1
};
static inline int PARTITION_VERITY_OF(int p) {
if (p == PARTITION_ROOT)
return PARTITION_ROOT_VERITY;
if (p == PARTITION_ROOT_SECONDARY)
return PARTITION_ROOT_SECONDARY_VERITY;
return _PARTITION_DESIGNATOR_INVALID;
}
typedef enum DissectImageFlags {
DISSECT_IMAGE_READ_ONLY = 1,
DISSECT_IMAGE_DISCARD_ON_LOOP = 2, /* Turn on "discard" if on a loop device and file system supports it */
DISSECT_IMAGE_DISCARD = 4, /* Turn on "discard" if file system supports it, on all block devices */
DISSECT_IMAGE_DISCARD_ON_CRYPTO = 8, /* Turn on "discard" also on crypto devices */
DISSECT_IMAGE_DISCARD_ANY = DISSECT_IMAGE_DISCARD_ON_LOOP |
DISSECT_IMAGE_DISCARD |
DISSECT_IMAGE_DISCARD_ON_CRYPTO,
DISSECT_IMAGE_GPT_ONLY = 16, /* Only recognize images with GPT partition tables */
DISSECT_IMAGE_REQUIRE_ROOT = 32, /* Don't accept disks without root partition */
} DissectImageFlags;
struct DissectedImage {
bool encrypted:1;
bool verity:1; /* verity available and usable */
bool can_verity:1; /* verity available, but not necessarily used */
DissectedPartition partitions[_PARTITION_DESIGNATOR_MAX];
};
int dissect_image(int fd, const void *root_hash, size_t root_hash_size, DissectImageFlags flags, DissectedImage **ret);
DissectedImage* dissected_image_unref(DissectedImage *m);
DEFINE_TRIVIAL_CLEANUP_FUNC(DissectedImage*, dissected_image_unref);
int dissected_image_decrypt(DissectedImage *m, const char *passphrase, const void *root_hash, size_t root_hash_size, DissectImageFlags flags, DecryptedImage **ret);
int dissected_image_decrypt_interactively(DissectedImage *m, const char *passphrase, const void *root_hash, size_t root_hash_size, DissectImageFlags flags, DecryptedImage **ret);
int dissected_image_mount(DissectedImage *m, const char *dest, DissectImageFlags flags);
DecryptedImage* decrypted_image_unref(DecryptedImage *p);
DEFINE_TRIVIAL_CLEANUP_FUNC(DecryptedImage*, decrypted_image_unref);
int decrypted_image_relinquish(DecryptedImage *d);
const char* partition_designator_to_string(int i) _const_;
int partition_designator_from_string(const char *name) _pure_;
int root_hash_load(const char *image, void **ret, size_t *ret_size);
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