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-rw-r--r--lib/integrity/integrity.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/lib/integrity/integrity.h b/lib/integrity/integrity.h
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+++ b/lib/integrity/integrity.h
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+/*
+ * Integrity header definition
+ *
+ * Copyright (C) 2016-2023 Milan Broz
+ *
+ * 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 _CRYPTSETUP_INTEGRITY_H
+#define _CRYPTSETUP_INTEGRITY_H
+
+#include <stdint.h>
+
+struct crypt_device;
+struct device;
+struct crypt_params_integrity;
+struct volume_key;
+struct crypt_dm_active_device;
+
+/* dm-integrity helper */
+#define SB_MAGIC "integrt"
+#define SB_VERSION_1 1
+#define SB_VERSION_2 2
+#define SB_VERSION_3 3
+#define SB_VERSION_4 4
+#define SB_VERSION_5 5
+
+#define SB_FLAG_HAVE_JOURNAL_MAC (1 << 0)
+#define SB_FLAG_RECALCULATING (1 << 1) /* V2 only */
+#define SB_FLAG_DIRTY_BITMAP (1 << 2) /* V3 only */
+#define SB_FLAG_FIXED_PADDING (1 << 3) /* V4 only */
+#define SB_FLAG_FIXED_HMAC (1 << 4) /* V5 only */
+
+struct superblock {
+ uint8_t magic[8];
+ uint8_t version;
+ int8_t log2_interleave_sectors;
+ uint16_t integrity_tag_size;
+ uint32_t journal_sections;
+ uint64_t provided_data_sectors;
+ uint32_t flags;
+ uint8_t log2_sectors_per_block;
+ uint8_t log2_blocks_per_bitmap_bit; /* V3 only */
+ uint8_t pad[2];
+ uint64_t recalc_sector; /* V2 only */
+} __attribute__ ((packed));
+
+int INTEGRITY_read_sb(struct crypt_device *cd,
+ struct crypt_params_integrity *params,
+ uint32_t *flags);
+
+int INTEGRITY_dump(struct crypt_device *cd, struct device *device, uint64_t offset);
+
+int INTEGRITY_data_sectors(struct crypt_device *cd,
+ struct device *device, uint64_t offset,
+ uint64_t *data_sectors);
+int INTEGRITY_key_size(const char *integrity);
+int INTEGRITY_tag_size(const char *integrity,
+ const char *cipher,
+ const char *cipher_mode);
+int INTEGRITY_hash_tag_size(const char *integrity);
+
+int INTEGRITY_format(struct crypt_device *cd,
+ const struct crypt_params_integrity *params,
+ struct volume_key *journal_crypt_key,
+ struct volume_key *journal_mac_key);
+
+int INTEGRITY_activate(struct crypt_device *cd,
+ const char *name,
+ const struct crypt_params_integrity *params,
+ struct volume_key *vk,
+ struct volume_key *journal_crypt_key,
+ struct volume_key *journal_mac_key,
+ uint32_t flags, uint32_t sb_flags);
+
+int INTEGRITY_create_dmd_device(struct crypt_device *cd,
+ const struct crypt_params_integrity *params,
+ struct volume_key *vk,
+ struct volume_key *journal_crypt_key,
+ struct volume_key *journal_mac_key,
+ struct crypt_dm_active_device *dmd,
+ uint32_t flags, uint32_t sb_flags);
+
+int INTEGRITY_activate_dmd_device(struct crypt_device *cd,
+ const char *name,
+ const char *type,
+ struct crypt_dm_active_device *dmd,
+ uint32_t sb_flags);
+#endif