X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=lib%2Fsetup.c;h=992f3c45e8fa9b1047fdecee29730d116fac2e73;hb=05af3a3383aea6bdd5050b6c5207ac3a55a3f05b;hp=5d62f6092721adb16561cfbcfd89c9e1cca9a278;hpb=697c6c9324e8b9230d271ea2a1abe2faead05542;p=platform%2Fupstream%2Fcryptsetup.git

diff --git a/lib/setup.c b/lib/setup.c
index 5d62f60..992f3c4 100644
--- a/lib/setup.c
+++ b/lib/setup.c
@@ -30,16 +30,15 @@
 #include "luks.h"
 #include "loopaes.h"
 #include "verity.h"
+#include "tcrypt.h"
 #include "internal.h"
 
 struct crypt_device {
 	char *type;
 
-	char *device;
-	char *metadata_device;
+	struct device *device;
+	struct device *metadata_device;
 
-	char *backing_file;
-	int loop_fd;
 	struct volume_key *volume_key;
 	uint64_t timeout;
 	uint64_t iteration_time;
@@ -47,28 +46,39 @@ struct crypt_device {
 	int password_verify;
 	int rng_type;
 
-	/* used in CRYPT_LUKS1 */
-	struct luks_phdr hdr;
-	uint64_t PBKDF2_per_sec;
-
-	/* used in CRYPT_PLAIN */
-	struct crypt_params_plain plain_hdr;
-	char *plain_cipher;
-	char *plain_cipher_mode;
-	char *plain_uuid;
-	unsigned int plain_key_size;
-
-	/* used in CRYPT_LOOPAES */
-	struct crypt_params_loopaes loopaes_hdr;
-	char *loopaes_cipher;
-	char *loopaes_cipher_mode;
-	char *loopaes_uuid;
-	unsigned int loopaes_key_size;
-
-	/* used in CRYPT_VERITY */
-	struct crypt_params_verity verity_hdr;
-	char *verity_root_hash;
-	uint64_t verity_root_hash_size;
+	// FIXME: private binary headers and access it properly
+	// through sub-library (LUKS1, TCRYPT)
+
+	union {
+	struct { /* used in CRYPT_LUKS1 */
+		struct luks_phdr hdr;
+		uint64_t PBKDF2_per_sec;
+	} luks1;
+	struct { /* used in CRYPT_PLAIN */
+		struct crypt_params_plain hdr;
+		char *cipher;
+		char *cipher_mode;
+		char *uuid;
+		unsigned int key_size;
+	} plain;
+	struct { /* used in CRYPT_LOOPAES */
+		struct crypt_params_loopaes hdr;
+		char *cipher;
+		char *cipher_mode;
+		char *uuid;
+		unsigned int key_size;
+	} loopaes;
+	struct { /* used in CRYPT_VERITY */
+		struct crypt_params_verity hdr;
+		char *root_hash;
+		unsigned int root_hash_size;
+		char *uuid;
+	} verity;
+	struct { /* used in CRYPT_TCRYPT */
+		struct crypt_params_tcrypt params;
+		struct tcrypt_phdr hdr;
+	} tcrypt;
+	} u;
 
 	/* callbacks definitions */
 	void (*log)(int level, const char *msg, void *usrptr);
@@ -153,12 +163,23 @@ void logger(struct crypt_device *cd, int level, const char *file,
 	free(target);
 }
 
-static const char *mdata_device(struct crypt_device *cd)
+static const char *mdata_device_path(struct crypt_device *cd)
+{
+	return device_path(cd->metadata_device ?: cd->device);
+}
+
+/* internal only */
+struct device *crypt_metadata_device(struct crypt_device *cd)
 {
 	return cd->metadata_device ?: cd->device;
 }
 
-static int init_crypto(struct crypt_device *ctx)
+struct device *crypt_data_device(struct crypt_device *cd)
+{
+	return cd->device;
+}
+
+int init_crypto(struct crypt_device *ctx)
 {
 	int r;
 
@@ -233,18 +254,23 @@ static int isVERITY(const char *type)
 	return (type && !strcmp(CRYPT_VERITY, type));
 }
 
+static int isTCRYPT(const char *type)
+{
+	return (type && !strcmp(CRYPT_TCRYPT, type));
+}
+
 /* keyslot helpers */
 static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot)
 {
 	if (*keyslot == CRYPT_ANY_SLOT) {
-		*keyslot = LUKS_keyslot_find_empty(&cd->hdr);
+		*keyslot = LUKS_keyslot_find_empty(&cd->u.luks1.hdr);
 		if (*keyslot < 0) {
 			log_err(cd, _("All key slots full.\n"));
 			return -EINVAL;
 		}
 	}
 
-	switch (LUKS_keyslot_info(&cd->hdr, *keyslot)) {
+	switch (LUKS_keyslot_info(&cd->u.luks1.hdr, *keyslot)) {
 		case CRYPT_SLOT_INVALID:
 			log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
 				*keyslot, LUKS_NUMKEYS - 1);
@@ -304,7 +330,7 @@ int PLAIN_activate(struct crypt_device *cd,
 		.uuid   = crypt_get_uuid(cd),
 		.size   = size,
 		.flags  = flags,
-		.data_device = crypt_get_device_name(cd),
+		.data_device = crypt_data_device(cd),
 		.u.crypt  = {
 			.cipher = NULL,
 			.vk     = vk,
@@ -318,8 +344,8 @@ int PLAIN_activate(struct crypt_device *cd,
 	else
 		device_check = DEV_EXCL;
 
-	r = device_check_and_adjust(cd, dmd.data_device, device_check,
-				    &dmd.size, &dmd.u.crypt.offset, &dmd.flags);
+	r = device_block_adjust(cd, dmd.data_device, device_check,
+				dmd.u.crypt.offset, &dmd.size, &dmd.flags);
 	if (r)
 		return r;
 
@@ -334,11 +360,11 @@ int PLAIN_activate(struct crypt_device *cd,
 	log_dbg("Trying to activate PLAIN device %s using cipher %s.",
 		name, dmd.u.crypt.cipher);
 
-	r = dm_create_device(name, CRYPT_PLAIN, &dmd, 0);
+	r = dm_create_device(cd, name, CRYPT_PLAIN, &dmd, 0);
 
 	// FIXME
-	if (!cd->plain_uuid && dm_query_device(name, DM_ACTIVE_UUID, &dmd) >= 0)
-		cd->plain_uuid = CONST_CAST(char*)dmd.uuid;
+	if (!cd->u.plain.uuid && dm_query_device(cd, name, DM_ACTIVE_UUID, &dmd) >= 0)
+		cd->u.plain.uuid = CONST_CAST(char*)dmd.uuid;
 
 	free(dm_cipher);
 	return r;
@@ -355,16 +381,23 @@ int crypt_confirm(struct crypt_device *cd, const char *msg)
 static int key_from_terminal(struct crypt_device *cd, char *msg, char **key,
 			      size_t *key_len, int force_verify)
 {
-	char *prompt = NULL;
+	char *prompt = NULL, *device_name;
 	int r;
 
 	*key = NULL;
-	if(!msg && asprintf(&prompt, _("Enter passphrase for %s: "),
-			    cd->backing_file ?: crypt_get_device_name(cd)) < 0)
-		return -ENOMEM;
-
-	if (!msg)
+	if(!msg) {
+		if (crypt_loop_device(crypt_get_device_name(cd)))
+			device_name = crypt_loop_backing_file(crypt_get_device_name(cd));
+		else
+			device_name = strdup(crypt_get_device_name(cd));
+		if (!device_name)
+			return -ENOMEM;
+		r = asprintf(&prompt, _("Enter passphrase for %s: "), device_name);
+		free(device_name);
+		if (r < 0)
+			return -ENOMEM;
 		msg = prompt;
+	}
 
 	if (cd->password) {
 		*key = crypt_safe_alloc(DEFAULT_PASSPHRASE_SIZE_MAX);
@@ -407,8 +440,8 @@ static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslo
 		if(r < 0)
 			goto out;
 
-		r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase_read,
-					   passphrase_size_read, &cd->hdr, vk, cd);
+		r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
+					   passphrase_size_read, &cd->u.luks1.hdr, vk, cd);
 		if (r == -EPERM)
 			eperm = 1;
 		crypt_safe_free(passphrase_read);
@@ -497,7 +530,7 @@ const char *crypt_get_dir(void)
 int crypt_init(struct crypt_device **cd, const char *device)
 {
 	struct crypt_device *h = NULL;
-	int r, readonly = 0;
+	int r;
 
 	if (!cd)
 		return -EINVAL;
@@ -508,49 +541,12 @@ int crypt_init(struct crypt_device **cd, const char *device)
 		return -ENOMEM;
 
 	memset(h, 0, sizeof(*h));
-	h->loop_fd = -1;
 
-	if (device) {
-		r = device_ready(NULL, device, O_RDONLY);
-		if (r == -ENOTBLK) {
-			h->device = crypt_loop_get_device();
-			log_dbg("Not a block device, %s%s.",
-				h->device ? "using free loop device " :
-					 "no free loop device found",
-				h->device ?: "");
-			if (!h->device) {
-				log_err(NULL, _("Cannot find a free loopback device.\n"));
-				r = -ENOSYS;
-				goto bad;
-			}
-
-			/* Keep the loop open, dettached on last close. */
-			h->loop_fd = crypt_loop_attach(h->device, device, 0, 1, &readonly);
-			if (h->loop_fd == -1) {
-				log_err(NULL, _("Attaching loopback device failed "
-					"(loop device with autoclear flag is required).\n"));
-				r = -EINVAL;
-				goto bad;
-			}
-
-			h->backing_file = crypt_loop_backing_file(h->device);
-			r = device_ready(NULL, h->device, O_RDONLY);
-		}
-		if (r < 0) {
-			r = -ENOTBLK;
-			goto bad;
-		}
-	}
-
-	if (!h->device && device && !(h->device = strdup(device))) {
-		r = -ENOMEM;
+	r = device_alloc(&h->device, device);
+	if (r < 0)
 		goto bad;
-	}
 
-	if (dm_init(h, 1) < 0) {
-		r = -ENOSYS;
-		goto bad;
-	}
+	dm_backend_init();
 
 	h->iteration_time = 1000;
 	h->password_verify = 0;
@@ -559,13 +555,7 @@ int crypt_init(struct crypt_device **cd, const char *device)
 	*cd = h;
 	return 0;
 bad:
-
-	if (h) {
-		if (h->loop_fd != -1)
-			close(h->loop_fd);
-		free(h->device);
-		free(h->backing_file);
-	}
+	device_free(h->device);
 	free(h);
 	return r;
 }
@@ -578,13 +568,13 @@ static int crypt_check_data_device_size(struct crypt_device *cd)
 	/* Check data device size, require at least one sector */
 	size_min = crypt_get_data_offset(cd) << SECTOR_SHIFT ?: SECTOR_SIZE;
 
-	r = device_size(crypt_get_device_name(cd), &size);
+	r = device_size(cd->device, &size);
 	if (r < 0)
 		return r;
 
 	if (size < size_min) {
-		log_err(cd, _("LUKS header detected but device %s is too small.\n"),
-			crypt_get_device_name(cd));
+		log_err(cd, _("Header detected but device %s is too small.\n"),
+			device_path(cd->device));
 		return -EINVAL;
 	}
 
@@ -593,7 +583,7 @@ static int crypt_check_data_device_size(struct crypt_device *cd)
 
 int crypt_set_data_device(struct crypt_device *cd, const char *device)
 {
-	char *data_device;
+	struct device *dev = NULL;
 	int r;
 
 	log_dbg("Setting ciphertext data device to %s.", device ?: "(none)");
@@ -607,19 +597,16 @@ int crypt_set_data_device(struct crypt_device *cd, const char *device)
 	if (!cd->device || !device)
 		return -EINVAL;
 
-	r = device_ready(NULL, device, O_RDONLY);
+	r = device_alloc(&dev, device);
 	if (r < 0)
 		return r;
 
-	if (!(data_device = strdup(device)))
-		return -ENOMEM;
-
-	if (!cd->metadata_device)
+	if (!cd->metadata_device) {
 		cd->metadata_device = cd->device;
-	else
-		free(cd->device);
+	} else
+		device_free(cd->device);
 
-	cd->device = data_device;
+	cd->device = dev;
 
 	return crypt_check_data_device_size(cd);
 }
@@ -633,14 +620,40 @@ static int _crypt_load_luks1(struct crypt_device *cd, int require_header, int re
 	if (r < 0)
 		return r;
 
-	r = LUKS_read_phdr(mdata_device(cd), &hdr, require_header, repair, cd);
+	r = LUKS_read_phdr(&hdr, require_header, repair, cd);
 	if (r < 0)
 		return r;
 
 	if (!cd->type && !(cd->type = strdup(CRYPT_LUKS1)))
 		return -ENOMEM;
 
-	memcpy(&cd->hdr, &hdr, sizeof(hdr));
+	memcpy(&cd->u.luks1.hdr, &hdr, sizeof(hdr));
+
+	return r;
+}
+
+static int _crypt_load_tcrypt(struct crypt_device *cd, struct crypt_params_tcrypt *params)
+{
+	int r;
+
+	r = init_crypto(cd);
+	if (r < 0)
+		return r;
+
+	memcpy(&cd->u.tcrypt.params, params, sizeof(*params));
+
+	r = TCRYPT_read_phdr(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
+
+	cd->u.tcrypt.params.passphrase = NULL;
+	cd->u.tcrypt.params.passphrase_size = 0;
+	cd->u.tcrypt.params.keyfiles = NULL;
+	cd->u.tcrypt.params.keyfiles_count = 0;
+
+	if (r < 0)
+		return r;
+
+	if (!cd->type && !(cd->type = strdup(CRYPT_TCRYPT)))
+		return -ENOMEM;
 
 	return r;
 }
@@ -654,28 +667,31 @@ static int _crypt_load_verity(struct crypt_device *cd, struct crypt_params_verit
 	if (r < 0)
 		return r;
 
-	if (params->flags & CRYPT_VERITY_NO_HEADER)
+	if (params && params->flags & CRYPT_VERITY_NO_HEADER)
 		return -EINVAL;
 
 	if (params)
 		sb_offset = params->hash_area_offset;
 
-	r = VERITY_read_sb(cd, mdata_device(cd), sb_offset, &cd->verity_hdr);
+	r = VERITY_read_sb(cd, sb_offset, &cd->u.verity.uuid, &cd->u.verity.hdr);
 	if (r < 0)
 		return r;
 
 	if (params)
-		cd->verity_hdr.flags = params->flags;
-
-	if (params && params->data_device &&
-	    (r = crypt_set_data_device(cd, params->data_device)) < 0)
-		return r;
+		cd->u.verity.hdr.flags = params->flags;
 
-	cd->verity_root_hash_size = crypt_hash_size(cd->verity_hdr.hash_name);
+	/* Hash availability checked in sb load */
+	cd->u.verity.root_hash_size = crypt_hash_size(cd->u.verity.hdr.hash_name);
+	if (cd->u.verity.root_hash_size > 4096)
+		return -EINVAL;
 
 	if (!cd->type && !(cd->type = strdup(CRYPT_VERITY)))
 		return -ENOMEM;
 
+	if (params && params->data_device &&
+	    (r = crypt_set_data_device(cd, params->data_device)) < 0)
+		return r;
+
 	return r;
 }
 
@@ -685,41 +701,42 @@ static int _init_by_name_crypt(struct crypt_device *cd, const char *name)
 	char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
 	int key_nums, r;
 
-	r = dm_query_device(name, DM_ACTIVE_DEVICE |
-				   DM_ACTIVE_UUID |
-				   DM_ACTIVE_CRYPT_CIPHER |
-				   DM_ACTIVE_CRYPT_KEYSIZE, &dmd);
+	r = dm_query_device(cd, name,
+			DM_ACTIVE_DEVICE |
+			DM_ACTIVE_UUID |
+			DM_ACTIVE_CRYPT_CIPHER |
+			DM_ACTIVE_CRYPT_KEYSIZE, &dmd);
 	if (r < 0)
 		goto out;
 
 	if (isPLAIN(cd->type)) {
-		cd->plain_uuid = dmd.uuid ? strdup(dmd.uuid) : NULL;
-		cd->plain_hdr.hash = NULL; /* no way to get this */
-		cd->plain_hdr.offset = dmd.u.crypt.offset;
-		cd->plain_hdr.skip = dmd.u.crypt.iv_offset;
-		cd->plain_key_size = dmd.u.crypt.vk->keylength;
+		cd->u.plain.uuid = dmd.uuid ? strdup(dmd.uuid) : NULL;
+		cd->u.plain.hdr.hash = NULL; /* no way to get this */
+		cd->u.plain.hdr.offset = dmd.u.crypt.offset;
+		cd->u.plain.hdr.skip = dmd.u.crypt.iv_offset;
+		cd->u.plain.key_size = dmd.u.crypt.vk->keylength;
 
 		r = crypt_parse_name_and_mode(dmd.u.crypt.cipher, cipher, NULL, cipher_mode);
 		if (!r) {
-			cd->plain_cipher = strdup(cipher);
-			cd->plain_cipher_mode = strdup(cipher_mode);
+			cd->u.plain.cipher = strdup(cipher);
+			cd->u.plain.cipher_mode = strdup(cipher_mode);
 		}
 	} else if (isLOOPAES(cd->type)) {
-		cd->loopaes_uuid = dmd.uuid ? strdup(dmd.uuid) : NULL;
-		cd->loopaes_hdr.offset = dmd.u.crypt.offset;
+		cd->u.loopaes.uuid = dmd.uuid ? strdup(dmd.uuid) : NULL;
+		cd->u.loopaes.hdr.offset = dmd.u.crypt.offset;
 
 		r = crypt_parse_name_and_mode(dmd.u.crypt.cipher, cipher,
 					      &key_nums, cipher_mode);
 		if (!r) {
-			cd->loopaes_cipher = strdup(cipher);
-			cd->loopaes_cipher_mode = strdup(cipher_mode);
+			cd->u.loopaes.cipher = strdup(cipher);
+			cd->u.loopaes.cipher_mode = strdup(cipher_mode);
 			/* version 3 uses last key for IV */
 			if (dmd.u.crypt.vk->keylength % key_nums)
 				key_nums++;
-			cd->loopaes_key_size = dmd.u.crypt.vk->keylength / key_nums;
+			cd->u.loopaes.key_size = dmd.u.crypt.vk->keylength / key_nums;
 		}
 	} else if (isLUKS(cd->type)) {
-		if (mdata_device(cd)) {
+		if (crypt_metadata_device(cd)) {
 			r = _crypt_load_luks1(cd, 0, 0);
 			if (r < 0) {
 				log_dbg("LUKS device header does not match active device.");
@@ -729,21 +746,24 @@ static int _init_by_name_crypt(struct crypt_device *cd, const char *name)
 				goto out;
 			}
 			/* check whether UUIDs match each other */
-			r = crypt_uuid_cmp(dmd.uuid, cd->hdr.uuid);
+			r = crypt_uuid_cmp(dmd.uuid, cd->u.luks1.hdr.uuid);
 			if (r < 0) {
 				log_dbg("LUKS device header uuid: %s mismatches DM returned uuid %s",
-					cd->hdr.uuid, dmd.uuid);
+					cd->u.luks1.hdr.uuid, dmd.uuid);
 				free(cd->type);
 				cd->type = NULL;
 				r = 0;
 				goto out;
 			}
 		}
+	} else if (isTCRYPT(cd->type)) {
+		r = TCRYPT_init_by_name(cd, name, &dmd, &cd->device,
+					&cd->u.tcrypt.params, &cd->u.tcrypt.hdr);
 	}
 out:
 	crypt_free_volume_key(dmd.u.crypt.vk);
+	device_free(dmd.data_device);
 	free(CONST_CAST(void*)dmd.u.crypt.cipher);
-	free(CONST_CAST(void*)dmd.data_device);
 	free(CONST_CAST(void*)dmd.uuid);
 	return r;
 }
@@ -757,35 +777,34 @@ static int _init_by_name_verity(struct crypt_device *cd, const char *name)
 	};
 	int r;
 
-	r = dm_query_device(name, DM_ACTIVE_DEVICE |
-				   DM_ACTIVE_UUID |
-				   DM_ACTIVE_VERITY_HASH_DEVICE |
-				   DM_ACTIVE_VERITY_PARAMS, &dmd);
+	r = dm_query_device(cd, name,
+				DM_ACTIVE_DEVICE |
+				DM_ACTIVE_UUID |
+				DM_ACTIVE_VERITY_HASH_DEVICE |
+				DM_ACTIVE_VERITY_PARAMS, &dmd);
 	if (r < 0)
 		goto out;
 
 	if (isVERITY(cd->type)) {
-		cd->verity_hdr.flags = CRYPT_VERITY_NO_HEADER; //FIXME
-		//cd->verity_uuid = dmd.uuid ? strdup(dmd.uuid) : NULL;
-		cd->verity_hdr.data_size = params.data_size;
-		cd->verity_root_hash_size = dmd.u.verity.root_hash_size;
-		cd->verity_root_hash = NULL;
-		cd->verity_hdr.hash_name = params.hash_name;
-		cd->verity_hdr.data_device = NULL;
-		cd->verity_hdr.hash_device = NULL;
-		cd->verity_hdr.data_block_size = params.data_block_size;
-		cd->verity_hdr.hash_block_size = params.hash_block_size;
-		cd->verity_hdr.hash_area_offset = dmd.u.verity.hash_offset;
-		cd->verity_hdr.hash_type = params.hash_type;
-		cd->verity_hdr.flags = params.flags;
-		cd->verity_hdr.salt_size = params.salt_size;
-		cd->verity_hdr.salt = params.salt;
-		if (!(cd->metadata_device = strdup(dmd.u.verity.hash_device)))
-			r = -ENOMEM;
+		cd->u.verity.uuid = dmd.uuid ? strdup(dmd.uuid) : NULL;
+		cd->u.verity.hdr.flags = CRYPT_VERITY_NO_HEADER; //FIXME
+		cd->u.verity.hdr.data_size = params.data_size;
+		cd->u.verity.root_hash_size = dmd.u.verity.root_hash_size;
+		cd->u.verity.root_hash = NULL;
+		cd->u.verity.hdr.hash_name = params.hash_name;
+		cd->u.verity.hdr.data_device = NULL;
+		cd->u.verity.hdr.hash_device = NULL;
+		cd->u.verity.hdr.data_block_size = params.data_block_size;
+		cd->u.verity.hdr.hash_block_size = params.hash_block_size;
+		cd->u.verity.hdr.hash_area_offset = dmd.u.verity.hash_offset;
+		cd->u.verity.hdr.hash_type = params.hash_type;
+		cd->u.verity.hdr.flags = params.flags;
+		cd->u.verity.hdr.salt_size = params.salt_size;
+		cd->u.verity.hdr.salt = params.salt;
+		cd->metadata_device = dmd.u.verity.hash_device;
 	}
 out:
-	free(CONST_CAST(void*)dmd.u.verity.hash_device);
-	free(CONST_CAST(void*)dmd.data_device);
+	device_free(dmd.data_device);
 	free(CONST_CAST(void*)dmd.uuid);
 	return r;
 }
@@ -809,7 +828,7 @@ int crypt_init_by_name_and_header(struct crypt_device **cd,
 		return -ENODEV;
 	}
 
-	r = dm_query_device(name, DM_ACTIVE_DEVICE | DM_ACTIVE_UUID, &dmd);
+	r = dm_query_device(NULL, name, DM_ACTIVE_DEVICE | DM_ACTIVE_UUID, &dmd);
 	if (r < 0)
 		goto out;
 
@@ -818,7 +837,7 @@ int crypt_init_by_name_and_header(struct crypt_device **cd,
 	if (header_device) {
 		r = crypt_init(cd, header_device);
 	} else {
-		r = crypt_init(cd, dmd.data_device);
+		r = crypt_init(cd, device_path(dmd.data_device));
 
 		/* Underlying device disappeared but mapping still active */
 		if (!dmd.data_device || r == -ENOTBLK)
@@ -827,7 +846,7 @@ int crypt_init_by_name_and_header(struct crypt_device **cd,
 
 		/* Underlying device is not readable but crypt mapping exists */
 		if (r == -ENOTBLK) {
-			free(CONST_CAST(void*)dmd.data_device);
+			device_free(dmd.data_device);
 			dmd.data_device = NULL;
 			r = crypt_init(cd, NULL);
 		}
@@ -845,26 +864,21 @@ int crypt_init_by_name_and_header(struct crypt_device **cd,
 			(*cd)->type = strdup(CRYPT_LUKS1);
 		else if (!strncmp(CRYPT_VERITY, dmd.uuid, sizeof(CRYPT_VERITY)-1))
 			(*cd)->type = strdup(CRYPT_VERITY);
+		else if (!strncmp(CRYPT_TCRYPT, dmd.uuid, sizeof(CRYPT_TCRYPT)-1))
+			(*cd)->type = strdup(CRYPT_TCRYPT);
 		else
 			log_dbg("Unknown UUID set, some parameters are not set.");
 	} else
 		log_dbg("Active device has no UUID set, some parameters are not set.");
 
 	if (header_device) {
-		r = crypt_set_data_device(*cd, dmd.data_device);
+		r = crypt_set_data_device(*cd, device_path(dmd.data_device));
 		if (r < 0)
 			goto out;
 	}
 
 	/* Try to initialise basic parameters from active device */
 
-	if (!(*cd)->backing_file && dmd.data_device &&
-	    crypt_loop_device(dmd.data_device) &&
-	    !((*cd)->backing_file = crypt_loop_backing_file(dmd.data_device))) {
-		r = -ENOMEM;
-		goto out;
-	}
-
 	if (dmd.target == DM_CRYPT)
 		r = _init_by_name_crypt(*cd, name);
 	else if (dmd.target == DM_VERITY)
@@ -874,7 +888,7 @@ out:
 		crypt_free(*cd);
 		*cd = NULL;
 	}
-	free(CONST_CAST(void*)dmd.data_device);
+	device_free(dmd.data_device);
 	free(CONST_CAST(void*)dmd.uuid);
 	return r;
 }
@@ -901,25 +915,28 @@ static int _crypt_format_plain(struct crypt_device *cd,
 		return -EINVAL;
 	}
 
-	cd->plain_key_size = volume_key_size;
+	if (!(cd->type = strdup(CRYPT_PLAIN)))
+		return -ENOMEM;
+
+	cd->u.plain.key_size = volume_key_size;
 	cd->volume_key = crypt_alloc_volume_key(volume_key_size, NULL);
 	if (!cd->volume_key)
 		return -ENOMEM;
 
-	cd->plain_cipher = strdup(cipher);
-	cd->plain_cipher_mode = strdup(cipher_mode);
+	cd->u.plain.cipher = strdup(cipher);
+	cd->u.plain.cipher_mode = strdup(cipher_mode);
 
 	if (uuid)
-		cd->plain_uuid = strdup(uuid);
+		cd->u.plain.uuid = strdup(uuid);
 
 	if (params && params->hash)
-		cd->plain_hdr.hash = strdup(params->hash);
+		cd->u.plain.hdr.hash = strdup(params->hash);
 
-	cd->plain_hdr.offset = params ? params->offset : 0;
-	cd->plain_hdr.skip = params ? params->skip : 0;
-	cd->plain_hdr.size = params ? params->size : 0;
+	cd->u.plain.hdr.offset = params ? params->offset : 0;
+	cd->u.plain.hdr.skip = params ? params->skip : 0;
+	cd->u.plain.hdr.size = params ? params->size : 0;
 
-	if (!cd->plain_cipher || !cd->plain_cipher_mode)
+	if (!cd->u.plain.cipher || !cd->u.plain.cipher_mode)
 		return -ENOMEM;
 
 	return 0;
@@ -937,11 +954,14 @@ static int _crypt_format_luks1(struct crypt_device *cd,
 	unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
 	unsigned long alignment_offset = 0;
 
-	if (!mdata_device(cd)) {
+	if (!crypt_metadata_device(cd)) {
 		log_err(cd, _("Can't format LUKS without device.\n"));
 		return -EINVAL;
 	}
 
+	if (!(cd->type = strdup(CRYPT_LUKS1)))
+		return -ENOMEM;
+
 	if (volume_key)
 		cd->volume_key = crypt_alloc_volume_key(volume_key_size,
 						      volume_key);
@@ -953,39 +973,50 @@ static int _crypt_format_luks1(struct crypt_device *cd,
 
 	if (params && params->data_device) {
 		cd->metadata_device = cd->device;
-		if (!(cd->device = strdup(params->data_device)))
+		cd->device = NULL;
+		if (device_alloc(&cd->device, params->data_device) < 0)
 			return -ENOMEM;
 		required_alignment = params->data_alignment * SECTOR_SIZE;
 	} else if (params && params->data_alignment) {
 		required_alignment = params->data_alignment * SECTOR_SIZE;
 	} else
-		get_topology_alignment(cd->device, &required_alignment,
+		device_topology_alignment(cd->device,
+				       &required_alignment,
 				       &alignment_offset, DEFAULT_DISK_ALIGNMENT);
 
-	r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
+	/* Check early if we cannot allocate block device for key slot access */
+	r = device_block_adjust(cd, cd->device, DEV_OK, 0, NULL, NULL);
+	if(r < 0)
+		return r;
+
+	r = LUKS_generate_phdr(&cd->u.luks1.hdr, cd->volume_key, cipher, cipher_mode,
 			       (params && params->hash) ? params->hash : "sha1",
 			       uuid, LUKS_STRIPES,
 			       required_alignment / SECTOR_SIZE,
 			       alignment_offset / SECTOR_SIZE,
-			       cd->iteration_time, &cd->PBKDF2_per_sec,
-			       cd->metadata_device, cd);
+			       cd->iteration_time, &cd->u.luks1.PBKDF2_per_sec,
+			       cd->metadata_device ? 1 : 0, cd);
 	if(r < 0)
 		return r;
 
 	/* Wipe first 8 sectors - fs magic numbers etc. */
-	r = crypt_wipe(mdata_device(cd), 0, 8 * SECTOR_SIZE, CRYPT_WIPE_ZERO, 1);
+	r = crypt_wipe(crypt_metadata_device(cd), 0, 8 * SECTOR_SIZE, CRYPT_WIPE_ZERO, 1);
 	if(r < 0) {
 		if (r == -EBUSY)
 			log_err(cd, _("Cannot format device %s which is still in use.\n"),
-				mdata_device(cd));
-		else
+				mdata_device_path(cd));
+		else if (r == -EACCES) {
+			log_err(cd, _("Cannot format device %s, permission denied.\n"),
+				mdata_device_path(cd));
+			r = -EINVAL;
+		} else
 			log_err(cd, _("Cannot wipe header on device %s.\n"),
-				mdata_device(cd));
+				mdata_device_path(cd));
 
 		return r;
 	}
 
-	r = LUKS_write_phdr(mdata_device(cd), &cd->hdr, cd);
+	r = LUKS_write_phdr(&cd->u.luks1.hdr, cd);
 
 	return r;
 }
@@ -996,7 +1027,7 @@ static int _crypt_format_loopaes(struct crypt_device *cd,
 				 size_t volume_key_size,
 				 struct crypt_params_loopaes *params)
 {
-	if (!mdata_device(cd)) {
+	if (!crypt_metadata_device(cd)) {
 		log_err(cd, _("Can't format LOOPAES without device.\n"));
 		return -EINVAL;
 	}
@@ -1006,29 +1037,33 @@ static int _crypt_format_loopaes(struct crypt_device *cd,
 		return -EINVAL;
 	}
 
-	cd->loopaes_key_size = volume_key_size;
+	if (!(cd->type = strdup(CRYPT_LOOPAES)))
+		return -ENOMEM;
+
+	cd->u.loopaes.key_size = volume_key_size;
 
-	cd->loopaes_cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER);
+	cd->u.loopaes.cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER);
 
 	if (uuid)
-		cd->loopaes_uuid = strdup(uuid);
+		cd->u.loopaes.uuid = strdup(uuid);
 
 	if (params && params->hash)
-		cd->loopaes_hdr.hash = strdup(params->hash);
+		cd->u.loopaes.hdr.hash = strdup(params->hash);
 
-	cd->loopaes_hdr.offset = params ? params->offset : 0;
-	cd->loopaes_hdr.skip = params ? params->skip : 0;
+	cd->u.loopaes.hdr.offset = params ? params->offset : 0;
+	cd->u.loopaes.hdr.skip = params ? params->skip : 0;
 
 	return 0;
 }
 
 static int _crypt_format_verity(struct crypt_device *cd,
+				 const char *uuid,
 				 struct crypt_params_verity *params)
 {
-	int r = 0;
+	int r = 0, hash_size;
 	uint64_t data_device_size;
 
-	if (!mdata_device(cd)) {
+	if (!crypt_metadata_device(cd)) {
 		log_err(cd, _("Can't format VERITY without device.\n"));
 		return -EINVAL;
 	}
@@ -1036,67 +1071,91 @@ static int _crypt_format_verity(struct crypt_device *cd,
 	if (!params || !params->data_device)
 		return -EINVAL;
 
-	/* set data device */
-	cd->type = CRYPT_VERITY;
+	if (params->hash_type > VERITY_MAX_HASH_TYPE) {
+		log_err(cd, _("Unsupported VERITY hash type %d.\n"), params->hash_type);
+		return -EINVAL;
+	}
+
+	if (VERITY_BLOCK_SIZE_OK(params->data_block_size) ||
+	    VERITY_BLOCK_SIZE_OK(params->hash_block_size)) {
+		log_err(cd, _("Unsupported VERITY block size.\n"));
+		return -EINVAL;
+	}
+
+	if (params->hash_area_offset % 512) {
+		log_err(cd, _("Unsupported VERITY hash offset.\n"));
+		return -EINVAL;
+	}
+
+	if (!(cd->type = strdup(CRYPT_VERITY)))
+		return -ENOMEM;
+
 	r = crypt_set_data_device(cd, params->data_device);
-	cd->type = NULL;
 	if (r)
 		return r;
 	if (!params->data_size) {
-		r = device_size(params->data_device, &data_device_size);
+		r = device_size(cd->device, &data_device_size);
 		if (r < 0)
 			return r;
 
-		cd->verity_hdr.data_size = data_device_size / params->data_block_size;
+		cd->u.verity.hdr.data_size = data_device_size / params->data_block_size;
 	} else
-		cd->verity_hdr.data_size = params->data_size;
-
+		cd->u.verity.hdr.data_size = params->data_size;
 
-	cd->verity_root_hash_size = crypt_hash_size(params->hash_name);
-	if (!cd->verity_root_hash_size)
+	hash_size = crypt_hash_size(params->hash_name);
+	if (hash_size <= 0) {
+		log_err(cd, _("Hash algorithm %s not supported.\n"),
+			params->hash_name);
 		return -EINVAL;
+	}
+	cd->u.verity.root_hash_size = hash_size;
+
+	cd->u.verity.root_hash = malloc(cd->u.verity.root_hash_size);
+	if (!cd->u.verity.root_hash)
+		return -ENOMEM;
 
-	cd->verity_root_hash = malloc(cd->verity_root_hash_size);
-	if (!cd->verity_root_hash)
+	cd->u.verity.hdr.flags = params->flags;
+	if (!(cd->u.verity.hdr.hash_name = strdup(params->hash_name)))
+		return -ENOMEM;
+	cd->u.verity.hdr.data_device = NULL;
+	cd->u.verity.hdr.data_block_size = params->data_block_size;
+	cd->u.verity.hdr.hash_block_size = params->hash_block_size;
+	cd->u.verity.hdr.hash_area_offset = params->hash_area_offset;
+	cd->u.verity.hdr.hash_type = params->hash_type;
+	cd->u.verity.hdr.flags = params->flags;
+	cd->u.verity.hdr.salt_size = params->salt_size;
+	if (!(cd->u.verity.hdr.salt = malloc(params->salt_size)))
 		return -ENOMEM;
 
-	cd->verity_hdr.flags = params->flags;
-	cd->verity_hdr.hash_name = strdup(params->hash_name);
-	cd->verity_hdr.data_device = NULL;
-	cd->verity_hdr.data_block_size = params->data_block_size;
-	cd->verity_hdr.hash_block_size = params->hash_block_size;
-	cd->verity_hdr.hash_area_offset = params->hash_area_offset;
-	cd->verity_hdr.hash_type = params->hash_type;
-	cd->verity_hdr.flags = params->flags;
-	cd->verity_hdr.salt_size = params->salt_size;
-	cd->verity_hdr.salt = malloc(params->salt_size);
 	if (params->salt)
-		memcpy(CONST_CAST(char*)cd->verity_hdr.salt, params->salt,
+		memcpy(CONST_CAST(char*)cd->u.verity.hdr.salt, params->salt,
 		       params->salt_size);
 	else
-		r = crypt_random_get(cd, CONST_CAST(char*)cd->verity_hdr.salt,
+		r = crypt_random_get(cd, CONST_CAST(char*)cd->u.verity.hdr.salt,
 				     params->salt_size, CRYPT_RND_SALT);
 	if (r)
-		goto out;
+		return r;
 
 	if (params->flags & CRYPT_VERITY_CREATE_HASH) {
-		r = VERITY_create(cd, &cd->verity_hdr, cd->device, mdata_device(cd),
-				  cd->verity_root_hash, cd->verity_root_hash_size);
+		r = VERITY_create(cd, &cd->u.verity.hdr,
+				  cd->u.verity.root_hash, cd->u.verity.root_hash_size);
 		if (r)
-			goto out;
+			return r;
 	}
 
-	if (!(params->flags & CRYPT_VERITY_NO_HEADER))
-		r = VERITY_write_sb(cd, mdata_device(cd),
-				    cd->verity_hdr.hash_area_offset,
-				    &cd->verity_hdr);
-out:
-	if (r) {
-		free(cd->verity_root_hash);
-		free(CONST_CAST(char*)cd->verity_hdr.hash_name);
-		free(CONST_CAST(char*)cd->verity_hdr.salt);
-	}
+	if (!(params->flags & CRYPT_VERITY_NO_HEADER)) {
+		if (uuid)
+			cd->u.verity.uuid = strdup(uuid);
+		else {
+			r = VERITY_UUID_generate(cd, &cd->u.verity.uuid);
+			if (r)
+				return r;
+		}
 
+		r = VERITY_write_sb(cd, cd->u.verity.hdr.hash_area_offset,
+				    cd->u.verity.uuid,
+				    &cd->u.verity.hdr);
+	}
 	return r;
 }
 
@@ -1119,7 +1178,7 @@ int crypt_format(struct crypt_device *cd,
 		return -EINVAL;
 	}
 
-	log_dbg("Formatting device %s as type %s.", mdata_device(cd) ?: "(none)", type);
+	log_dbg("Formatting device %s as type %s.", mdata_device_path(cd) ?: "(none)", type);
 
 	r = init_crypto(cd);
 	if (r < 0)
@@ -1134,17 +1193,15 @@ int crypt_format(struct crypt_device *cd,
 	else if (isLOOPAES(type))
 		r = _crypt_format_loopaes(cd, cipher, uuid, volume_key_size, params);
 	else if (isVERITY(type))
-		r = _crypt_format_verity(cd, params);
+		r = _crypt_format_verity(cd, uuid, params);
 	else {
-		/* FIXME: allow plugins here? */
 		log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
 		r = -EINVAL;
 	}
 
-	if (!r && !(cd->type = strdup(type)))
-		r = -ENOMEM;
-
 	if (r < 0) {
+		free(cd->type);
+		cd->type = NULL;
 		crypt_free_volume_key(cd->volume_key);
 		cd->volume_key = NULL;
 	}
@@ -1159,9 +1216,9 @@ int crypt_load(struct crypt_device *cd,
 	int r;
 
 	log_dbg("Trying to load %s crypt type from device %s.",
-		requested_type ?: "any", mdata_device(cd) ?: "(none)");
+		requested_type ?: "any", mdata_device_path(cd) ?: "(none)");
 
-	if (!mdata_device(cd))
+	if (!crypt_metadata_device(cd))
 		return -EINVAL;
 
 	if (!requested_type || isLUKS(requested_type)) {
@@ -1177,19 +1234,15 @@ int crypt_load(struct crypt_device *cd,
 			return -EINVAL;
 		}
 		r = _crypt_load_verity(cd, params);
+	} else if (isTCRYPT(requested_type)) {
+		if (cd->type && !isTCRYPT(cd->type)) {
+			log_dbg("Context is already initialised to type %s", cd->type);
+			return -EINVAL;
+		}
+		r = _crypt_load_tcrypt(cd, params);
 	} else
 		return -EINVAL;
 
-	if (r < 0)
-		return r;
-
-	/* cd->type and header must be set in context */
-	r = crypt_check_data_device_size(cd);
-	if (r < 0) {
-		free(cd->type);
-		cd->type = NULL;
-	}
-
 	return r;
 }
 
@@ -1200,9 +1253,9 @@ int crypt_repair(struct crypt_device *cd,
 	int r;
 
 	log_dbg("Trying to repair %s crypt type from device %s.",
-		requested_type ?: "any", mdata_device(cd) ?: "(none)");
+		requested_type ?: "any", mdata_device_path(cd) ?: "(none)");
 
-	if (!mdata_device(cd))
+	if (!crypt_metadata_device(cd))
 		return -EINVAL;
 
 	if (requested_type && !isLUKS(requested_type))
@@ -1235,7 +1288,7 @@ int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
 
 	log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size);
 
-	r = dm_query_device(name, DM_ACTIVE_DEVICE | DM_ACTIVE_CRYPT_CIPHER |
+	r = dm_query_device(cd, name, DM_ACTIVE_DEVICE | DM_ACTIVE_CRYPT_CIPHER |
 				  DM_ACTIVE_UUID | DM_ACTIVE_CRYPT_KEYSIZE |
 				  DM_ACTIVE_CRYPT_KEY, &dmd);
 	if (r < 0) {
@@ -1248,8 +1301,8 @@ int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
 		goto out;
 	}
 
-	r = device_check_and_adjust(cd, dmd.data_device, DEV_OK, &new_size,
-				    &dmd.u.crypt.offset, &dmd.flags);
+	r = device_block_adjust(cd, dmd.data_device, DEV_OK,
+				dmd.u.crypt.offset, &new_size, &dmd.flags);
 	if (r)
 		goto out;
 
@@ -1259,7 +1312,10 @@ int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size)
 		r = 0;
 	} else {
 		dmd.size = new_size;
-		r = dm_create_device(name, cd->type, &dmd, 1);
+		if (isTCRYPT(cd->type))
+			r = -ENOTSUP;
+		else
+			r = dm_create_device(cd, name, cd->type, &dmd, 1);
 	}
 out:
 	if (dmd.target == DM_CRYPT) {
@@ -1279,21 +1335,21 @@ int crypt_set_uuid(struct crypt_device *cd, const char *uuid)
 		return  -EINVAL;
 	}
 
-	if (uuid && !strncmp(uuid, cd->hdr.uuid, sizeof(cd->hdr.uuid))) {
+	if (uuid && !strncmp(uuid, cd->u.luks1.hdr.uuid, sizeof(cd->u.luks1.hdr.uuid))) {
 		log_dbg("UUID is the same as requested (%s) for device %s.",
-			uuid, mdata_device(cd));
+			uuid, mdata_device_path(cd));
 		return 0;
 	}
 
 	if (uuid)
-		log_dbg("Requested new UUID change to %s for %s.", uuid, mdata_device(cd));
+		log_dbg("Requested new UUID change to %s for %s.", uuid, mdata_device_path(cd));
 	else
-		log_dbg("Requested new UUID refresh for %s.", mdata_device(cd));
+		log_dbg("Requested new UUID refresh for %s.", mdata_device_path(cd));
 
 	if (!crypt_confirm(cd, _("Do you really want to change UUID of device?")))
 		return -EPERM;
 
-	return LUKS_hdr_uuid_set(mdata_device(cd), &cd->hdr, uuid, cd);
+	return LUKS_hdr_uuid_set(&cd->u.luks1.hdr, uuid, cd);
 }
 
 int crypt_header_backup(struct crypt_device *cd,
@@ -1310,9 +1366,9 @@ int crypt_header_backup(struct crypt_device *cd,
 		return r;
 
 	log_dbg("Requested header backup of device %s (%s) to "
-		"file %s.", mdata_device(cd), requested_type, backup_file);
+		"file %s.", mdata_device_path(cd), requested_type, backup_file);
 
-	return LUKS_hdr_backup(backup_file, mdata_device(cd), &cd->hdr, cd);
+	return LUKS_hdr_backup(backup_file, &cd->u.luks1.hdr, cd);
 }
 
 int crypt_header_restore(struct crypt_device *cd,
@@ -1329,43 +1385,39 @@ int crypt_header_restore(struct crypt_device *cd,
 		return r;
 
 	log_dbg("Requested header restore to device %s (%s) from "
-		"file %s.", mdata_device(cd), requested_type, backup_file);
+		"file %s.", mdata_device_path(cd), requested_type, backup_file);
 
-	return LUKS_hdr_restore(backup_file, mdata_device(cd), &cd->hdr, cd);
+	return LUKS_hdr_restore(backup_file, &cd->u.luks1.hdr, cd);
 }
 
 void crypt_free(struct crypt_device *cd)
 {
 	if (cd) {
-		log_dbg("Releasing crypt device %s context.", mdata_device(cd));
-
-		if (cd->loop_fd != -1)
-			close(cd->loop_fd);
+		log_dbg("Releasing crypt device %s context.", mdata_device_path(cd));
 
-		dm_exit();
+		dm_backend_exit();
 		crypt_free_volume_key(cd->volume_key);
 
-		free(cd->device);
-		free(cd->metadata_device);
-		free(cd->backing_file);
-		free(cd->type);
-
-		/* used in plain device only */
-		free(CONST_CAST(void*)cd->plain_hdr.hash);
-		free(cd->plain_cipher);
-		free(cd->plain_cipher_mode);
-		free(cd->plain_uuid);
-
-		/* used in loop-AES device only */
-		free(CONST_CAST(void*)cd->loopaes_hdr.hash);
-		free(cd->loopaes_cipher);
-		free(cd->loopaes_uuid);
-
-		/* used in verity device only */
-		free(CONST_CAST(void*)cd->verity_hdr.hash_name);
-		free(CONST_CAST(void*)cd->verity_hdr.salt);
-		free(cd->verity_root_hash);
+		device_free(cd->device);
+		device_free(cd->metadata_device);
+
+		if (isPLAIN(cd->type)) {
+			free(CONST_CAST(void*)cd->u.plain.hdr.hash);
+			free(cd->u.plain.cipher);
+			free(cd->u.plain.cipher_mode);
+			free(cd->u.plain.uuid);
+		} else if (isLOOPAES(cd->type)) {
+			free(CONST_CAST(void*)cd->u.loopaes.hdr.hash);
+			free(cd->u.loopaes.cipher);
+			free(cd->u.loopaes.uuid);
+		} else if (isVERITY(cd->type)) {
+			free(CONST_CAST(void*)cd->u.verity.hdr.hash_name);
+			free(CONST_CAST(void*)cd->u.verity.hdr.salt);
+			free(cd->u.verity.root_hash);
+			free(cd->u.verity.uuid);
+		}
 
+		free(cd->type);
 		free(cd);
 	}
 }
@@ -1378,7 +1430,7 @@ int crypt_suspend(struct crypt_device *cd,
 
 	log_dbg("Suspending volume %s.", name);
 
-	if (!isLUKS(cd->type)) {
+	if (!cd || !isLUKS(cd->type)) {
 		log_err(cd, _("This operation is supported only for LUKS device.\n"));
 		r = -EINVAL;
 		goto out;
@@ -1390,10 +1442,9 @@ int crypt_suspend(struct crypt_device *cd,
 		return -EINVAL;
 	}
 
-	if (!cd && dm_init(NULL, 1) < 0)
-		return -ENOSYS;
+	dm_backend_init();
 
-	r = dm_status_suspended(name);
+	r = dm_status_suspended(cd, name);
 	if (r < 0)
 		goto out;
 
@@ -1403,14 +1454,13 @@ int crypt_suspend(struct crypt_device *cd,
 		goto out;
 	}
 
-	r = dm_suspend_and_wipe_key(name);
+	r = dm_suspend_and_wipe_key(cd, name);
 	if (r == -ENOTSUP)
 		log_err(cd, "Suspend is not supported for device %s.\n", name);
 	else if (r)
 		log_err(cd, "Error during suspending device %s.\n", name);
 out:
-	if (!cd)
-		dm_exit();
+	dm_backend_exit();
 	return r;
 }
 
@@ -1431,7 +1481,7 @@ int crypt_resume_by_passphrase(struct crypt_device *cd,
 		goto out;
 	}
 
-	r = dm_status_suspended(name);
+	r = dm_status_suspended(cd, name);
 	if (r < 0)
 		return r;
 
@@ -1441,14 +1491,14 @@ int crypt_resume_by_passphrase(struct crypt_device *cd,
 	}
 
 	if (passphrase) {
-		r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase,
-					   passphrase_size, &cd->hdr, &vk, cd);
+		r = LUKS_open_key_with_hdr(keyslot, passphrase, passphrase_size,
+					   &cd->u.luks1.hdr, &vk, cd);
 	} else
 		r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
 
 	if (r >= 0) {
 		keyslot = r;
-		r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
+		r = dm_resume_and_reinstate_key(cd, name, vk->keylength, vk->key);
 		if (r == -ENOTSUP)
 			log_err(cd, "Resume is not supported for device %s.\n", name);
 		else if (r)
@@ -1480,7 +1530,7 @@ int crypt_resume_by_keyfile_offset(struct crypt_device *cd,
 		goto out;
 	}
 
-	r = dm_status_suspended(name);
+	r = dm_status_suspended(cd, name);
 	if (r < 0)
 		return r;
 
@@ -1498,13 +1548,13 @@ int crypt_resume_by_keyfile_offset(struct crypt_device *cd,
 	if (r < 0)
 		goto out;
 
-	r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase_read,
-				   passphrase_size_read, &cd->hdr, &vk, cd);
+	r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
+				   passphrase_size_read, &cd->u.luks1.hdr, &vk, cd);
 	if (r < 0)
 		goto out;
 
 	keyslot = r;
-	r = dm_resume_and_reinstate_key(name, vk->keylength, vk->key);
+	r = dm_resume_and_reinstate_key(cd, name, vk->keylength, vk->key);
 	if (r)
 		log_err(cd, "Error during resuming device %s.\n", name);
 out:
@@ -1549,7 +1599,7 @@ int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
 	if (r)
 		return r;
 
-	if (!LUKS_keyslot_active_count(&cd->hdr)) {
+	if (!LUKS_keyslot_active_count(&cd->u.luks1.hdr)) {
 		/* No slots used, try to use pre-generated key in header */
 		if (cd->volume_key) {
 			vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
@@ -1560,8 +1610,8 @@ int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
 		}
 	} else if (passphrase) {
 		/* Passphrase provided, use it to unlock existing keyslot */
-		r = LUKS_open_key_with_hdr(mdata_device(cd), CRYPT_ANY_SLOT, passphrase,
-					   passphrase_size, &cd->hdr, &vk, cd);
+		r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, passphrase,
+					   passphrase_size, &cd->u.luks1.hdr, &vk, cd);
 	} else {
 		/* Passphrase not provided, ask first and use it to unlock existing keyslot */
 		r = key_from_terminal(cd, _("Enter any passphrase: "),
@@ -1569,8 +1619,8 @@ int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
 		if (r < 0)
 			goto out;
 
-		r = LUKS_open_key_with_hdr(mdata_device(cd), CRYPT_ANY_SLOT, password,
-					   passwordLen, &cd->hdr, &vk, cd);
+		r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password,
+					   passwordLen, &cd->u.luks1.hdr, &vk, cd);
 		crypt_safe_free(password);
 	}
 
@@ -1587,8 +1637,8 @@ int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
 			goto out;
 	}
 
-	r = LUKS_set_key(mdata_device(cd), keyslot, new_password, new_passwordLen,
-			 &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
+	r = LUKS_set_key(keyslot, new_password, new_passwordLen,
+			 &cd->u.luks1.hdr, vk, cd->iteration_time, &cd->u.luks1.PBKDF2_per_sec, cd);
 	if(r < 0) goto out;
 
 	r = 0;
@@ -1599,6 +1649,67 @@ out:
 	return r ?: keyslot;
 }
 
+int crypt_keyslot_change_by_passphrase(struct crypt_device *cd,
+	int keyslot_old,
+	int keyslot_new,
+	const char *passphrase,
+	size_t passphrase_size,
+	const char *new_passphrase,
+	size_t new_passphrase_size)
+{
+	struct volume_key *vk = NULL;
+	int r = -EINVAL;
+
+	log_dbg("Changing passphrase from old keyslot %d to new %d.",
+		keyslot_old, keyslot_new);
+
+	if (!isLUKS(cd->type)) {
+		log_err(cd, _("This operation is supported only for LUKS device.\n"));
+		return -EINVAL;
+	}
+
+	r = LUKS_open_key_with_hdr(keyslot_old, passphrase, passphrase_size,
+				   &cd->u.luks1.hdr, &vk, cd);
+	if (r < 0)
+		return r;
+
+	if (keyslot_old != CRYPT_ANY_SLOT && keyslot_old != r) {
+		log_dbg("Keyslot mismatch.");
+		goto out;
+	}
+	keyslot_old = r;
+
+	if (keyslot_new == CRYPT_ANY_SLOT) {
+		keyslot_new = LUKS_keyslot_find_empty(&cd->u.luks1.hdr);
+		if (keyslot_new < 0)
+			keyslot_new = keyslot_old;
+	}
+
+	if (keyslot_old == keyslot_new) {
+		log_dbg("Key slot %d is going to be overwritten.", keyslot_old);
+		(void)crypt_keyslot_destroy(cd, keyslot_old);
+	}
+
+	r = LUKS_set_key(keyslot_new, new_passphrase, new_passphrase_size,
+			 &cd->u.luks1.hdr, vk, cd->iteration_time,
+			 &cd->u.luks1.PBKDF2_per_sec, cd);
+
+	if (keyslot_old == keyslot_new) {
+		if (r >= 0)
+			log_verbose(cd, _("Key slot %d changed.\n"), r);
+	} else {
+		if (r >= 0) {
+			log_verbose(cd, _("Replaced with key slot %d.\n"), r);
+			r = crypt_keyslot_destroy(cd, keyslot_old);
+		}
+	}
+	if (r < 0)
+		log_err(cd, _("Failed to swap new key slot.\n"));
+out:
+	crypt_free_volume_key(vk);
+	return r ?: keyslot_new;
+}
+
 int crypt_keyslot_add_by_keyfile_offset(struct crypt_device *cd,
 	int keyslot,
 	const char *keyfile,
@@ -1625,7 +1736,7 @@ int crypt_keyslot_add_by_keyfile_offset(struct crypt_device *cd,
 	if (r)
 		return r;
 
-	if (!LUKS_keyslot_active_count(&cd->hdr)) {
+	if (!LUKS_keyslot_active_count(&cd->u.luks1.hdr)) {
 		/* No slots used, try to use pre-generated key in header */
 		if (cd->volume_key) {
 			vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key);
@@ -1646,8 +1757,8 @@ int crypt_keyslot_add_by_keyfile_offset(struct crypt_device *cd,
 		if (r < 0)
 			goto out;
 
-		r = LUKS_open_key_with_hdr(mdata_device(cd), CRYPT_ANY_SLOT, password, passwordLen,
-					   &cd->hdr, &vk, cd);
+		r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password, passwordLen,
+					   &cd->u.luks1.hdr, &vk, cd);
 	}
 
 	if(r < 0)
@@ -1663,8 +1774,8 @@ int crypt_keyslot_add_by_keyfile_offset(struct crypt_device *cd,
 	if (r < 0)
 		goto out;
 
-	r = LUKS_set_key(mdata_device(cd), keyslot, new_password, new_passwordLen,
-			 &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
+	r = LUKS_set_key(keyslot, new_password, new_passwordLen,
+			 &cd->u.luks1.hdr, vk, cd->iteration_time, &cd->u.luks1.PBKDF2_per_sec, cd);
 out:
 	crypt_safe_free(password);
 	crypt_safe_free(new_password);
@@ -1710,7 +1821,7 @@ int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
 	if (!vk)
 		return -ENOMEM;
 
-	r = LUKS_verify_volume_key(&cd->hdr, vk);
+	r = LUKS_verify_volume_key(&cd->u.luks1.hdr, vk);
 	if (r < 0) {
 		log_err(cd, _("Volume key does not match the volume.\n"));
 		goto out;
@@ -1729,8 +1840,8 @@ int crypt_keyslot_add_by_volume_key(struct crypt_device *cd,
 		passphrase_size = new_passwordLen;
 	}
 
-	r = LUKS_set_key(mdata_device(cd), keyslot, passphrase, passphrase_size,
-			 &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
+	r = LUKS_set_key(keyslot, passphrase, passphrase_size,
+			 &cd->u.luks1.hdr, vk, cd->iteration_time, &cd->u.luks1.PBKDF2_per_sec, cd);
 out:
 	crypt_safe_free(new_password);
 	crypt_free_volume_key(vk);
@@ -1759,7 +1870,7 @@ int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
 		return -EINVAL;
 	}
 
-	return LUKS_del_key(mdata_device(cd), keyslot, &cd->hdr, cd);
+	return LUKS_del_key(keyslot, &cd->u.luks1.hdr, cd);
 }
 
 // activation/deactivation of device mapping
@@ -1804,19 +1915,19 @@ int crypt_activate_by_passphrase(struct crypt_device *cd,
 			passphrase_size = passphraseLen;
 		}
 
-		r = process_key(cd, cd->plain_hdr.hash,
-				cd->plain_key_size,
+		r = process_key(cd, cd->u.plain.hdr.hash,
+				cd->u.plain.key_size,
 				passphrase, passphrase_size, &vk);
 		if (r < 0)
 			goto out;
 
-		r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
+		r = PLAIN_activate(cd, name, vk, cd->u.plain.hdr.size, flags);
 		keyslot = 0;
 	} else if (isLUKS(cd->type)) {
 		/* provided passphrase, do not retry */
 		if (passphrase) {
-			r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase,
-						   passphrase_size, &cd->hdr, &vk, cd);
+			r = LUKS_open_key_with_hdr(keyslot, passphrase,
+						   passphrase_size, &cd->u.luks1.hdr, &vk, cd);
 		} else
 			r = volume_key_by_terminal_passphrase(cd, keyslot, &vk);
 
@@ -1875,20 +1986,20 @@ int crypt_activate_by_keyfile_offset(struct crypt_device *cd,
 		if (r < 0)
 			goto out;
 
-		r = process_key(cd, cd->plain_hdr.hash,
-				cd->plain_key_size,
+		r = process_key(cd, cd->u.plain.hdr.hash,
+				cd->u.plain.key_size,
 				passphrase_read, passphrase_size_read, &vk);
 		if (r < 0)
 			goto out;
 
-		r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
+		r = PLAIN_activate(cd, name, vk, cd->u.plain.hdr.size, flags);
 	} else if (isLUKS(cd->type)) {
 		r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
 			  &passphrase_size_read, keyfile, keyfile_offset, keyfile_size);
 		if (r < 0)
 			goto out;
-		r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase_read,
-					   passphrase_size_read, &cd->hdr, &vk, cd);
+		r = LUKS_open_key_with_hdr(keyslot, passphrase_read,
+					   passphrase_size_read, &cd->u.luks1.hdr, &vk, cd);
 		if (r < 0)
 			goto out;
 		keyslot = r;
@@ -1904,12 +2015,12 @@ int crypt_activate_by_keyfile_offset(struct crypt_device *cd,
 				  keyfile, keyfile_offset, keyfile_size);
 		if (r < 0)
 			goto out;
-		r = LOOPAES_parse_keyfile(cd, &vk, cd->loopaes_hdr.hash, &key_count,
+		r = LOOPAES_parse_keyfile(cd, &vk, cd->u.loopaes.hdr.hash, &key_count,
 					  passphrase_read, passphrase_size_read);
 		if (r < 0)
 			goto out;
 		if (name)
-			r = LOOPAES_activate(cd, name, cd->loopaes_cipher,
+			r = LOOPAES_activate(cd, name, cd->u.loopaes.cipher,
 					     key_count, vk, flags);
 	} else
 		r = -EINVAL;
@@ -1959,7 +2070,7 @@ int crypt_activate_by_volume_key(struct crypt_device *cd,
 		if (!name)
 			return -EINVAL;
 
-		if (!volume_key || !volume_key_size || volume_key_size != cd->plain_key_size) {
+		if (!volume_key || !volume_key_size || volume_key_size != cd->u.plain.key_size) {
 			log_err(cd, _("Incorrect volume key specified for plain device.\n"));
 			return -EINVAL;
 		}
@@ -1968,7 +2079,7 @@ int crypt_activate_by_volume_key(struct crypt_device *cd,
 		if (!vk)
 			return -ENOMEM;
 
-		r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags);
+		r = PLAIN_activate(cd, name, vk, cd->u.plain.hdr.size, flags);
 	} else if (isLUKS(cd->type)) {
 		/* If key is not provided, try to use internal key */
 		if (!volume_key) {
@@ -1983,7 +2094,7 @@ int crypt_activate_by_volume_key(struct crypt_device *cd,
 		vk = crypt_alloc_volume_key(volume_key_size, volume_key);
 		if (!vk)
 			return -ENOMEM;
-		r = LUKS_verify_volume_key(&cd->hdr, vk);
+		r = LUKS_verify_volume_key(&cd->u.luks1.hdr, vk);
 
 		if (r == -EPERM)
 			log_err(cd, _("Volume key does not match the volume.\n"));
@@ -1997,20 +2108,24 @@ int crypt_activate_by_volume_key(struct crypt_device *cd,
 			return -EINVAL;
 		}
 
-		r = VERITY_activate(cd, name, mdata_device(cd),
-				    volume_key, volume_key_size,
-				    &cd->verity_hdr, CRYPT_ACTIVATE_READONLY);
+		r = VERITY_activate(cd, name, volume_key, volume_key_size,
+				    &cd->u.verity.hdr, CRYPT_ACTIVATE_READONLY);
 
 		if (r == -EPERM) {
-			free(cd->verity_root_hash);
-			cd->verity_root_hash = NULL;
+			free(cd->u.verity.root_hash);
+			cd->u.verity.root_hash = NULL;
 		} if (!r) {
-			cd->verity_root_hash_size = volume_key_size;
-			if (!cd->verity_root_hash)
-				cd->verity_root_hash = malloc(volume_key_size);
-			if (cd->verity_root_hash)
-				memcpy(cd->verity_root_hash, volume_key, volume_key_size);
+			cd->u.verity.root_hash_size = volume_key_size;
+			if (!cd->u.verity.root_hash)
+				cd->u.verity.root_hash = malloc(volume_key_size);
+			if (cd->u.verity.root_hash)
+				memcpy(cd->u.verity.root_hash, volume_key, volume_key_size);
 		}
+	} else if (isTCRYPT(cd->type)) {
+		if (!name)
+			return 0;
+		r = TCRYPT_activate(cd, name, &cd->u.tcrypt.hdr,
+				    &cd->u.tcrypt.params, flags);
 	} else
 		log_err(cd, _("Device type is not properly initialised.\n"));
 
@@ -2028,13 +2143,16 @@ int crypt_deactivate(struct crypt_device *cd, const char *name)
 
 	log_dbg("Deactivating volume %s.", name);
 
-	if (!cd && dm_init(NULL, 1) < 0)
-		return -ENOSYS;
+	if (!cd)
+		dm_backend_init();
 
 	switch (crypt_status(cd, name)) {
 		case CRYPT_ACTIVE:
 		case CRYPT_BUSY:
-			r = dm_remove_device(name, 0, 0);
+			if (cd && isTCRYPT(cd->type))
+				r = TCRYPT_deactivate(cd, name);
+			else
+				r = dm_remove_device(cd, name, 0, 0);
 			break;
 		case CRYPT_INACTIVE:
 			log_err(cd, _("Device %s is not active.\n"), name);
@@ -2046,7 +2164,7 @@ int crypt_deactivate(struct crypt_device *cd, const char *name)
 	}
 
 	if (!cd)
-		dm_exit();
+		dm_backend_exit();
 
 	return r;
 }
@@ -2073,15 +2191,16 @@ int crypt_volume_key_get(struct crypt_device *cd,
 		return -ENOMEM;
 	}
 
-	if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
-		r = process_key(cd, cd->plain_hdr.hash, key_len,
+	if (isPLAIN(cd->type) && cd->u.plain.hdr.hash) {
+		r = process_key(cd, cd->u.plain.hdr.hash, key_len,
 				passphrase, passphrase_size, &vk);
 		if (r < 0)
 			log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
 	} else if (isLUKS(cd->type)) {
-		r = LUKS_open_key_with_hdr(mdata_device(cd), keyslot, passphrase,
-					passphrase_size, &cd->hdr, &vk, cd);
-
+		r = LUKS_open_key_with_hdr(keyslot, passphrase,
+					passphrase_size, &cd->u.luks1.hdr, &vk, cd);
+	} else if (isTCRYPT(cd->type)) {
+		r = TCRYPT_get_volume_key(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params, &vk);
 	} else
 		log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
 
@@ -2110,7 +2229,7 @@ int crypt_volume_key_verify(struct crypt_device *cd,
 	if (!vk)
 		return -ENOMEM;
 
-	r = LUKS_verify_volume_key(&cd->hdr, vk);
+	r = LUKS_verify_volume_key(&cd->u.luks1.hdr, vk);
 
 	if (r == -EPERM)
 		log_err(cd, _("Volume key does not match the volume.\n"));
@@ -2176,13 +2295,13 @@ crypt_status_info crypt_status(struct crypt_device *cd, const char *name)
 {
 	int r;
 
-	if (!cd && dm_init(NULL, 1) < 0)
-		return CRYPT_INVALID;
+	if (!cd)
+		dm_backend_init();
 
-	r = dm_status_device(name);
+	r = dm_status_device(cd, name);
 
 	if (!cd)
-		dm_exit();
+		dm_backend_exit();
 
 	if (r < 0 && r != -ENODEV)
 		return CRYPT_INVALID;
@@ -2207,40 +2326,40 @@ static int _luks_dump(struct crypt_device *cd)
 {
 	int i;
 
-	log_std(cd, "LUKS header information for %s\n\n", mdata_device(cd));
-	log_std(cd, "Version:       \t%d\n", cd->hdr.version);
-	log_std(cd, "Cipher name:   \t%s\n", cd->hdr.cipherName);
-	log_std(cd, "Cipher mode:   \t%s\n", cd->hdr.cipherMode);
-	log_std(cd, "Hash spec:     \t%s\n", cd->hdr.hashSpec);
-	log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
-	log_std(cd, "MK bits:       \t%d\n", cd->hdr.keyBytes * 8);
+	log_std(cd, "LUKS header information for %s\n\n", mdata_device_path(cd));
+	log_std(cd, "Version:       \t%d\n", cd->u.luks1.hdr.version);
+	log_std(cd, "Cipher name:   \t%s\n", cd->u.luks1.hdr.cipherName);
+	log_std(cd, "Cipher mode:   \t%s\n", cd->u.luks1.hdr.cipherMode);
+	log_std(cd, "Hash spec:     \t%s\n", cd->u.luks1.hdr.hashSpec);
+	log_std(cd, "Payload offset:\t%d\n", cd->u.luks1.hdr.payloadOffset);
+	log_std(cd, "MK bits:       \t%d\n", cd->u.luks1.hdr.keyBytes * 8);
 	log_std(cd, "MK digest:     \t");
-	hexprint(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE, " ");
+	hexprint(cd, cd->u.luks1.hdr.mkDigest, LUKS_DIGESTSIZE, " ");
 	log_std(cd, "\n");
 	log_std(cd, "MK salt:       \t");
-	hexprint(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2, " ");
+	hexprint(cd, cd->u.luks1.hdr.mkDigestSalt, LUKS_SALTSIZE/2, " ");
 	log_std(cd, "\n               \t");
-	hexprint(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " ");
+	hexprint(cd, cd->u.luks1.hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " ");
 	log_std(cd, "\n");
-	log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
-	log_std(cd, "UUID:          \t%s\n\n", cd->hdr.uuid);
+	log_std(cd, "MK iterations: \t%d\n", cd->u.luks1.hdr.mkDigestIterations);
+	log_std(cd, "UUID:          \t%s\n\n", cd->u.luks1.hdr.uuid);
 	for(i = 0; i < LUKS_NUMKEYS; i++) {
-		if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
+		if(cd->u.luks1.hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
 			log_std(cd, "Key Slot %d: ENABLED\n",i);
 			log_std(cd, "\tIterations:         \t%d\n",
-				cd->hdr.keyblock[i].passwordIterations);
+				cd->u.luks1.hdr.keyblock[i].passwordIterations);
 			log_std(cd, "\tSalt:               \t");
-			hexprint(cd, cd->hdr.keyblock[i].passwordSalt,
+			hexprint(cd, cd->u.luks1.hdr.keyblock[i].passwordSalt,
 				 LUKS_SALTSIZE/2, " ");
 			log_std(cd, "\n\t                      \t");
-			hexprint(cd, cd->hdr.keyblock[i].passwordSalt +
+			hexprint(cd, cd->u.luks1.hdr.keyblock[i].passwordSalt +
 				 LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " ");
 			log_std(cd, "\n");
 
 			log_std(cd, "\tKey material offset:\t%d\n",
-				cd->hdr.keyblock[i].keyMaterialOffset);
+				cd->u.luks1.hdr.keyblock[i].keyMaterialOffset);
 			log_std(cd, "\tAF stripes:            \t%d\n",
-				cd->hdr.keyblock[i].stripes);
+				cd->u.luks1.hdr.keyblock[i].stripes);
 		}
 		else 
 			log_std(cd, "Key Slot %d: DISABLED\n", i);
@@ -2250,21 +2369,22 @@ static int _luks_dump(struct crypt_device *cd)
 
 static int _verity_dump(struct crypt_device *cd)
 {
-	log_std(cd, "VERITY header information for %s\n", mdata_device(cd));
-	log_std(cd, "Hash type:       \t%u\n", cd->verity_hdr.hash_type);
-	log_std(cd, "Data blocks:     \t%" PRIu64 "\n", cd->verity_hdr.data_size);
-	log_std(cd, "Data block size: \t%u\n", cd->verity_hdr.data_block_size);
-	log_std(cd, "Hash block size: \t%u\n", cd->verity_hdr.hash_block_size);
-	log_std(cd, "Hash algorithm:  \t%s\n", cd->verity_hdr.hash_name);
+	log_std(cd, "VERITY header information for %s\n", mdata_device_path(cd));
+	log_std(cd, "UUID:            \t%s\n", cd->u.verity.uuid ?: "");
+	log_std(cd, "Hash type:       \t%u\n", cd->u.verity.hdr.hash_type);
+	log_std(cd, "Data blocks:     \t%" PRIu64 "\n", cd->u.verity.hdr.data_size);
+	log_std(cd, "Data block size: \t%u\n", cd->u.verity.hdr.data_block_size);
+	log_std(cd, "Hash block size: \t%u\n", cd->u.verity.hdr.hash_block_size);
+	log_std(cd, "Hash algorithm:  \t%s\n", cd->u.verity.hdr.hash_name);
 	log_std(cd, "Salt:            \t");
-	if (cd->verity_hdr.salt_size)
-		hexprint(cd, cd->verity_hdr.salt, cd->verity_hdr.salt_size, "");
+	if (cd->u.verity.hdr.salt_size)
+		hexprint(cd, cd->u.verity.hdr.salt, cd->u.verity.hdr.salt_size, "");
 	else
 		log_std(cd, "-");
 	log_std(cd, "\n");
-	if (cd->verity_root_hash) {
+	if (cd->u.verity.root_hash) {
 		log_std(cd, "Root hash:      \t");
-		hexprint(cd, cd->verity_root_hash, cd->verity_root_hash_size, "");
+		hexprint(cd, cd->u.verity.root_hash, cd->u.verity.root_hash_size, "");
 		log_std(cd, "\n");
 	}
 	return 0;
@@ -2276,6 +2396,8 @@ int crypt_dump(struct crypt_device *cd)
 		return _luks_dump(cd);
 	else if (isVERITY(cd->type))
 		return _verity_dump(cd);
+	else if (isTCRYPT(cd->type))
+		return TCRYPT_dump(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
 
 	log_err(cd, _("Dump operation is not supported for this device type.\n"));
 	return -EINVAL;
@@ -2284,13 +2406,16 @@ int crypt_dump(struct crypt_device *cd)
 const char *crypt_get_cipher(struct crypt_device *cd)
 {
 	if (isPLAIN(cd->type))
-		return cd->plain_cipher;
+		return cd->u.plain.cipher;
 
 	if (isLUKS(cd->type))
-		return cd->hdr.cipherName;
+		return cd->u.luks1.hdr.cipherName;
 
 	if (isLOOPAES(cd->type))
-		return cd->loopaes_cipher;
+		return cd->u.loopaes.cipher;
+
+	if (isTCRYPT(cd->type))
+		return cd->u.tcrypt.params.cipher;
 
 	return NULL;
 }
@@ -2298,13 +2423,16 @@ const char *crypt_get_cipher(struct crypt_device *cd)
 const char *crypt_get_cipher_mode(struct crypt_device *cd)
 {
 	if (isPLAIN(cd->type))
-		return cd->plain_cipher_mode;
+		return cd->u.plain.cipher_mode;
 
 	if (isLUKS(cd->type))
-		return cd->hdr.cipherMode;
+		return cd->u.luks1.hdr.cipherMode;
 
 	if (isLOOPAES(cd->type))
-		return cd->loopaes_cipher_mode;
+		return cd->u.loopaes.cipher_mode;
+
+	if (isTCRYPT(cd->type))
+		return cd->u.tcrypt.params.mode;
 
 	return NULL;
 }
@@ -2312,35 +2440,46 @@ const char *crypt_get_cipher_mode(struct crypt_device *cd)
 const char *crypt_get_uuid(struct crypt_device *cd)
 {
 	if (isLUKS(cd->type))
-		return cd->hdr.uuid;
+		return cd->u.luks1.hdr.uuid;
 
 	if (isPLAIN(cd->type))
-		return cd->plain_uuid;
+		return cd->u.plain.uuid;
 
 	if (isLOOPAES(cd->type))
-		return cd->loopaes_uuid;
+		return cd->u.loopaes.uuid;
+
+	if (isVERITY(cd->type))
+		return cd->u.verity.uuid;
 
 	return NULL;
 }
 
 const char *crypt_get_device_name(struct crypt_device *cd)
 {
-	return cd->device;
+	const char *path = device_block_path(cd->device);
+
+	if (!path)
+		path = device_path(cd->device);
+
+	return path;
 }
 
 int crypt_get_volume_key_size(struct crypt_device *cd)
 {
 	if (isPLAIN(cd->type))
-		return cd->plain_key_size;
+		return cd->u.plain.key_size;
 
 	if (isLUKS(cd->type))
-		return cd->hdr.keyBytes;
+		return cd->u.luks1.hdr.keyBytes;
 
 	if (isLOOPAES(cd->type))
-		return cd->loopaes_key_size;
+		return cd->u.loopaes.key_size;
 
 	if (isVERITY(cd->type))
-		return cd->verity_root_hash_size;
+		return cd->u.verity.root_hash_size;
+
+	if (isTCRYPT(cd->type))
+		return cd->u.tcrypt.params.key_size;
 
 	return 0;
 }
@@ -2348,13 +2487,16 @@ int crypt_get_volume_key_size(struct crypt_device *cd)
 uint64_t crypt_get_data_offset(struct crypt_device *cd)
 {
 	if (isPLAIN(cd->type))
-		return cd->plain_hdr.offset;
+		return cd->u.plain.hdr.offset;
 
 	if (isLUKS(cd->type))
-		return cd->hdr.payloadOffset;
+		return cd->u.luks1.hdr.payloadOffset;
 
 	if (isLOOPAES(cd->type))
-		return cd->loopaes_hdr.offset;
+		return cd->u.loopaes.hdr.offset;
+
+	if (isTCRYPT(cd->type))
+		return TCRYPT_get_data_offset(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
 
 	return 0;
 }
@@ -2362,13 +2504,16 @@ uint64_t crypt_get_data_offset(struct crypt_device *cd)
 uint64_t crypt_get_iv_offset(struct crypt_device *cd)
 {
 	if (isPLAIN(cd->type))
-		return cd->plain_hdr.skip;
+		return cd->u.plain.hdr.skip;
 
 	if (isLUKS(cd->type))
 		return 0;
 
 	if (isLOOPAES(cd->type))
-		return cd->loopaes_hdr.skip;
+		return cd->u.loopaes.hdr.skip;
+
+	if (isTCRYPT(cd->type))
+		return TCRYPT_get_iv_offset(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
 
 	return 0;
 }
@@ -2380,7 +2525,7 @@ crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
 		return CRYPT_SLOT_INVALID;
 	}
 
-	return LUKS_keyslot_info(&cd->hdr, keyslot);
+	return LUKS_keyslot_info(&cd->u.luks1.hdr, keyslot);
 }
 
 int crypt_keyslot_max(const char *type)
@@ -2391,6 +2536,17 @@ int crypt_keyslot_max(const char *type)
 	return -EINVAL;
 }
 
+int crypt_keyslot_area(struct crypt_device *cd,
+	int keyslot,
+	uint64_t *offset,
+	uint64_t *length)
+{
+	if (!isLUKS(cd->type))
+		return -EINVAL;
+
+	return LUKS_keyslot_area(&cd->u.luks1.hdr, keyslot, offset, length);
+}
+
 const char *crypt_get_type(struct crypt_device *cd)
 {
 	return cd->type;
@@ -2402,36 +2558,40 @@ int crypt_get_verity_info(struct crypt_device *cd,
 	if (!isVERITY(cd->type) || !vp)
 		return -EINVAL;
 
-	vp->data_device = cd->device;
-	vp->hash_device = mdata_device(cd);
-	vp->hash_name = cd->verity_hdr.hash_name;
-	vp->salt = cd->verity_hdr.salt;
-	vp->salt_size = cd->verity_hdr.salt_size;
-	vp->data_block_size = cd->verity_hdr.data_block_size;
-	vp->hash_block_size = cd->verity_hdr.hash_block_size;
-	vp->data_size = cd->verity_hdr.data_size;
-	vp->hash_area_offset = cd->verity_hdr.hash_area_offset;
-	vp->hash_type = cd->verity_hdr.hash_type;
-	vp->flags = cd->verity_hdr.flags & CRYPT_VERITY_NO_HEADER;
+	vp->data_device = device_path(cd->device);
+	vp->hash_device = mdata_device_path(cd);
+	vp->hash_name = cd->u.verity.hdr.hash_name;
+	vp->salt = cd->u.verity.hdr.salt;
+	vp->salt_size = cd->u.verity.hdr.salt_size;
+	vp->data_block_size = cd->u.verity.hdr.data_block_size;
+	vp->hash_block_size = cd->u.verity.hdr.hash_block_size;
+	vp->data_size = cd->u.verity.hdr.data_size;
+	vp->hash_area_offset = cd->u.verity.hdr.hash_area_offset;
+	vp->hash_type = cd->u.verity.hdr.hash_type;
+	vp->flags = cd->u.verity.hdr.flags & CRYPT_VERITY_NO_HEADER;
 	return 0;
 }
 
-int crypt_get_active_device(struct crypt_device *cd __attribute__((unused)),
-			    const char *name,
+int crypt_get_active_device(struct crypt_device *cd, const char *name,
 			    struct crypt_active_device *cad)
 {
 	struct crypt_dm_active_device dmd;
 	int r;
 
-	r = dm_query_device(name, 0, &dmd);
+	r = dm_query_device(cd, name, 0, &dmd);
 	if (r < 0)
 		return r;
 
 	if (dmd.target != DM_CRYPT && dmd.target != DM_VERITY)
 		return -ENOTSUP;
 
-	cad->offset	= dmd.u.crypt.offset;
-	cad->iv_offset	= dmd.u.crypt.iv_offset;
+	if (cd && isTCRYPT(cd->type)) {
+		cad->offset	= TCRYPT_get_data_offset(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
+		cad->iv_offset	= TCRYPT_get_iv_offset(cd, &cd->u.tcrypt.hdr, &cd->u.tcrypt.params);
+	} else {
+		cad->offset	= dmd.u.crypt.offset;
+		cad->iv_offset	= dmd.u.crypt.iv_offset;
+	}
 	cad->size	= dmd.size;
 	cad->flags	= dmd.flags;