1 files changed, 96 insertions, 0 deletions
diff --git a/src/shared/dissect-image.h b/src/shared/dissect-image.h
new file mode 100644
index 0000000..f50b40e
--- /dev/null
+++ b/src/shared/dissect-image.h
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include <stdbool.h>
+
+#include "sd-id128.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 << 0,
+        DISSECT_IMAGE_DISCARD_ON_LOOP     = 1 << 1,  /* Turn on "discard" if on a loop device and file system supports it */
+        DISSECT_IMAGE_DISCARD             = 1 << 2,  /* Turn on "discard" if file system supports it, on all block devices */
+        DISSECT_IMAGE_DISCARD_ON_CRYPTO   = 1 << 3,  /* 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            = 1 << 4,  /* Only recognize images with GPT partition tables */
+        DISSECT_IMAGE_REQUIRE_ROOT        = 1 << 5,  /* Don't accept disks without root partition */
+        DISSECT_IMAGE_MOUNT_ROOT_ONLY     = 1 << 6,  /* Mount only the root partition */
+        DISSECT_IMAGE_MOUNT_NON_ROOT_ONLY = 1 << 7,  /* Mount only non-root partitions */
+        DISSECT_IMAGE_VALIDATE_OS         = 1 << 8,  /* Refuse mounting images that aren't identifyable as OS images */
+        DISSECT_IMAGE_NO_UDEV             = 1 << 9,  /* Don't wait for udev initializing things */
+} 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];
+
+        char *hostname;
+        sd_id128_t machine_id;
+        char **machine_info;
+        char **os_release;
+};
+
+int probe_filesystem(const char *node, char **ret_fstype);
+int dissect_image(int fd, const void *root_hash, size_t root_hash_size, DissectImageFlags flags, DissectedImage **ret);
+int dissect_image_and_warn(int fd, const char *name, 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, uid_t uid_shift, DissectImageFlags flags);
+
+int dissected_image_acquire_metadata(DissectedImage *m);
+
+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);