X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fsetup.c;h=38ec6d5958c8ef6c74ee6df3bd5f7be668845a0f;hb=ecf993834cfdfc3ff9e3584845ffce9a5b967184;hp=9519e99105aaaaa1b27f9bd7088a637fcf141263;hpb=312d8eca7342fb7de37f9124fb73119018a94523;p=platform%2Fupstream%2Fcryptsetup.git diff --git a/lib/setup.c b/lib/setup.c index 9519e99..38ec6d5 100644 --- a/lib/setup.c +++ b/lib/setup.c @@ -1,3 +1,24 @@ +/* + * libcryptsetup - cryptsetup library + * + * Copyright (C) 2004, Christophe Saout + * Copyright (C) 2004-2007, Clemens Fruhwirth + * Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + #include #include #include @@ -7,12 +28,17 @@ #include "libcryptsetup.h" #include "luks.h" +#include "loopaes.h" +#include "verity.h" +#include "tcrypt.h" #include "internal.h" struct crypt_device { char *type; - char *device; + struct device *device; + struct device *metadata_device; + struct volume_key *volume_key; uint64_t timeout; uint64_t iteration_time; @@ -29,6 +55,24 @@ struct crypt_device { 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; + unsigned int verity_root_hash_size; + char *verity_uuid; + + /* used in CRYPT_TCRYPT */ + struct crypt_params_tcrypt tcrypt_params; + struct tcrypt_phdr tcrypt_hdr; /* callbacks definitions */ void (*log)(int level, const char *msg, void *usrptr); @@ -37,8 +81,15 @@ struct crypt_device { void *confirm_usrptr; int (*password)(const char *msg, char *buf, size_t length, void *usrptr); void *password_usrptr; + + /* last error message */ + char error[MAX_ERROR_LENGTH]; }; +/* Global error */ +/* FIXME: not thread safe, remove this later */ +static char global_error[MAX_ERROR_LENGTH] = {0}; + /* Log helper */ static void (*_default_log)(int level, const char *msg, void *usrptr) = NULL; static int _debug_level = 0; @@ -48,19 +99,40 @@ void crypt_set_debug_level(int level) _debug_level = level; } -int crypt_get_debug_level() +int crypt_get_debug_level(void) { return _debug_level; } +static void crypt_set_error(struct crypt_device *cd, const char *error) +{ + size_t size = strlen(error); + + /* Set global error, ugly hack... */ + strncpy(global_error, error, MAX_ERROR_LENGTH - 2); + if (size < MAX_ERROR_LENGTH && global_error[size - 1] == '\n') + global_error[size - 1] = '\0'; + + /* Set error string per context */ + if (cd) { + strncpy(cd->error, error, MAX_ERROR_LENGTH - 2); + if (size < MAX_ERROR_LENGTH && cd->error[size - 1] == '\n') + cd->error[size - 1] = '\0'; + } +} + void crypt_log(struct crypt_device *cd, int level, const char *msg) { if (cd && cd->log) cd->log(level, msg, cd->log_usrptr); else if (_default_log) _default_log(level, msg, NULL); + + if (level == CRYPT_LOG_ERROR) + crypt_set_error(cd, msg); } +__attribute__((format(printf, 5, 6))) void logger(struct crypt_device *cd, int level, const char *file, int line, const char *format, ...) { @@ -69,7 +141,7 @@ void logger(struct crypt_device *cd, int level, const char *file, va_start(argp, format); - if (vasprintf(&target, format, argp) > 0) { + if (vasprintf(&target, format, argp) > 0 ) { if (level >= 0) { crypt_log(cd, level, target); #ifdef CRYPT_DEBUG @@ -85,51 +157,75 @@ void logger(struct crypt_device *cd, int level, const char *file, free(target); } -/* - * Password processing behaviour matrix of process_key - * - * from binary file: check if there is sufficently large key material - * interactive & from fd: hash if requested, otherwise crop or pad with '0' - */ -static char *process_key(struct crypt_device *cd, const char *hash_name, - const char *key_file, size_t key_size, - const char *pass, size_t passLen) +static const char *mdata_device_path(struct crypt_device *cd) { - char *key; + return device_path(cd->metadata_device ?: cd->device); +} - if (!key_size) - return NULL; - - key = crypt_safe_alloc(key_size); - memset(key, 0, key_size); - - /* key is coming from binary file */ - if (key_file && strcmp(key_file, "-")) { - if(passLen < key_size) { - log_err(cd, _("Cannot not read %d bytes from key file %s.\n"), - key_size, key_file); - crypt_safe_free(key); - return NULL; - } - memcpy(key, pass, key_size); - return key; +/* internal only */ +struct device *crypt_metadata_device(struct crypt_device *cd) +{ + return cd->metadata_device ?: cd->device; +} + +struct device *crypt_data_device(struct crypt_device *cd) +{ + return cd->device; +} + +int init_crypto(struct crypt_device *ctx) +{ + int r; + + crypt_fips_libcryptsetup_check(ctx); + + r = crypt_random_init(ctx); + if (r < 0) { + log_err(ctx, _("Cannot initialize crypto RNG backend.\n")); + return r; } - /* key is coming from tty, fd or binary stdin */ + r = crypt_backend_init(ctx); + if (r < 0) + log_err(ctx, _("Cannot initialize crypto backend.\n")); + + log_dbg("Crypto backend (%s) initialized.", crypt_backend_version()); + return r; +} + +static int process_key(struct crypt_device *cd, const char *hash_name, + size_t key_size, const char *pass, size_t passLen, + struct volume_key **vk) +{ + int r; + + if (!key_size) + return -EINVAL; + + *vk = crypt_alloc_volume_key(key_size, NULL); + if (!*vk) + return -ENOMEM; + if (hash_name) { - if (hash(NULL, hash_name, key, key_size, pass, passLen) < 0) { - log_err(cd, _("Key processing error (using hash algorithm %s).\n"), - hash_name); - crypt_safe_free(key); - return NULL; + r = crypt_plain_hash(cd, hash_name, (*vk)->key, key_size, pass, passLen); + if (r < 0) { + if (r == -ENOENT) + log_err(cd, _("Hash algorithm %s not supported.\n"), + hash_name); + else + log_err(cd, _("Key processing error (using hash %s).\n"), + hash_name); + crypt_free_volume_key(*vk); + *vk = NULL; + return -EINVAL; } } else if (passLen > key_size) { - memcpy(key, pass, key_size); + memcpy((*vk)->key, pass, key_size); } else { - memcpy(key, pass, passLen); + memcpy((*vk)->key, pass, passLen); } - return key; + return 0; } static int isPLAIN(const char *type) @@ -142,6 +238,21 @@ static int isLUKS(const char *type) return (type && !strcmp(CRYPT_LUKS1, type)); } +static int isLOOPAES(const char *type) +{ + return (type && !strcmp(CRYPT_LOOPAES, type)); +} + +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) { @@ -169,268 +280,90 @@ static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot) return 0; } -static int verify_other_keyslot(struct crypt_device *cd, - const char *key_file, - int keyIndex) -{ - struct volume_key *vk = NULL; - crypt_keyslot_info ki; - int openedIndex, r; - char *password = NULL; - unsigned int passwordLen; - - r = crypt_get_key(_("Enter any remaining LUKS passphrase: "), - &password, &passwordLen, 0, key_file, cd->timeout, - cd->password_verify, cd); - if(r < 0) - goto out; - - ki = crypt_keyslot_status(cd, keyIndex); - if (ki == CRYPT_SLOT_ACTIVE) /* Not last slot */ - LUKS_keyslot_set(&cd->hdr, keyIndex, 0); - - openedIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, - password, passwordLen, - &cd->hdr, &vk, cd); - - if (ki == CRYPT_SLOT_ACTIVE) - LUKS_keyslot_set(&cd->hdr, keyIndex, 1); - - if (openedIndex < 0) - r = -EPERM; - else - log_verbose(cd, _("Key slot %d verified.\n"), openedIndex); -out: - crypt_free_volume_key(vk); - crypt_safe_free(password); - return r; -} - -static int find_keyslot_by_passphrase(struct crypt_device *cd, - const char *key_file, - char *message) +/* + * compares UUIDs returned by device-mapper (striped by cryptsetup) and uuid in header + */ +static int crypt_uuid_cmp(const char *dm_uuid, const char *hdr_uuid) { - struct volume_key *vk = NULL; - char *password = NULL; - unsigned int passwordLen; - int r; - - r = crypt_get_key(message,&password,&passwordLen, 0, key_file, - cd->timeout, cd->password_verify, cd); - if (r < 0) - goto out; + int i, j; + char *str; - r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, - passwordLen, &cd->hdr, &vk, cd); -out: - crypt_free_volume_key(vk); - crypt_safe_free(password); - return r; -} + if (!dm_uuid || !hdr_uuid) + return -EINVAL; -static int device_check_and_adjust(struct crypt_device *cd, - const char *device, - int open_exclusive, - uint64_t *size, - uint64_t *offset, - int *read_only) -{ - int r, real_readonly; - uint64_t real_size; + str = strchr(dm_uuid, '-'); + if (!str) + return -EINVAL; - if (!device) - return -ENOTBLK; + for (i = 0, j = 1; hdr_uuid[i]; i++) { + if (hdr_uuid[i] == '-') + continue; - r = get_device_infos(device, open_exclusive, &real_readonly, &real_size); - if (r < 0) { - if (r == -EBUSY) - log_err(cd, _("Cannot use device %s which is in use " - "(already mapped or mounted).\n"), - device); - else - log_err(cd, _("Cannot get info about device %s.\n"), - device); - return r; - } + if (!str[j] || str[j] == '-') + return -EINVAL; - if (!*size) { - *size = real_size; - if (!*size) { - log_err(cd, _("Device %s has zero size.\n"), device); - return -ENOTBLK; - } - if (*size < *offset) { - log_err(cd, _("Device %s is too small.\n"), device); + if (str[j] != hdr_uuid[i]) return -EINVAL; - } - *size -= *offset; + j++; } - if (real_readonly) - *read_only = 1; - - log_dbg("Calculated device size is %" PRIu64 " sectors (%s), offset %" PRIu64 ".", - *size, *read_only ? "RO" : "RW", *offset); return 0; } -static int luks_remove_helper(struct crypt_device *cd, - int key_slot, - const char *other_key_file, - const char *key_file, - int verify) +int PLAIN_activate(struct crypt_device *cd, + const char *name, + struct volume_key *vk, + uint64_t size, + uint32_t flags) { - crypt_keyslot_info ki; - int r = -EINVAL; - - if (key_slot == CRYPT_ANY_SLOT) { - key_slot = find_keyslot_by_passphrase(cd, key_file, - _("Enter LUKS passphrase to be deleted: ")); - if(key_slot < 0) { - r = -EPERM; - goto out; + int r; + char *dm_cipher = NULL; + enum devcheck device_check; + struct crypt_dm_active_device dmd = { + .target = DM_CRYPT, + .uuid = crypt_get_uuid(cd), + .size = size, + .flags = flags, + .data_device = crypt_data_device(cd), + .u.crypt = { + .cipher = NULL, + .vk = vk, + .offset = crypt_get_data_offset(cd), + .iv_offset = crypt_get_iv_offset(cd), } + }; - log_std(cd, _("Key slot %d selected for deletion.\n"), key_slot); - } - - ki = crypt_keyslot_status(cd, key_slot); - if (ki == CRYPT_SLOT_INVALID) { - log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"), - key_slot, LUKS_NUMKEYS - 1); - r = -EINVAL; - goto out; - } - if (ki <= CRYPT_SLOT_INACTIVE) { - log_err(cd, _("Key %d not active. Can't wipe.\n"), key_slot); - r = -EINVAL; - goto out; - } - - if (ki == CRYPT_SLOT_ACTIVE_LAST && cd->confirm && - !(cd->confirm(_("This is the last keyslot." - " Device will become unusable after purging this key."), - cd->confirm_usrptr))) { - r = -EINVAL; - goto out; - } - - if(verify) - r = verify_other_keyslot(cd, other_key_file, key_slot); + if (dmd.flags & CRYPT_ACTIVATE_SHARED) + device_check = DEV_SHARED; else - r = 0; - - if (!r) - r = crypt_keyslot_destroy(cd, key_slot); -out: - return (r < 0) ? r : 0; -} - -static int create_device_helper(struct crypt_device *cd, - const char *name, - const char *hash, - const char *cipher, - const char *cipher_mode, - const char *key_file, - const char *key, - unsigned int keyLen, - int key_size, - uint64_t size, - uint64_t skip, - uint64_t offset, - const char *uuid, - int read_only, - unsigned int flags, - int reload) -{ - crypt_status_info ci; - char *dm_cipher = NULL; - char *processed_key = NULL; - int r; - - if (!name) - return -EINVAL; - - ci = crypt_status(cd, name); - if (ci == CRYPT_INVALID) - return -EINVAL; - - if (reload && ci < CRYPT_ACTIVE) - return -EINVAL; - - if (!reload && ci >= CRYPT_ACTIVE) { - log_err(cd, _("Device %s already exists.\n"), name); - return -EEXIST; - } - - if (key_size < 0 || key_size > 1024) { - log_err(cd, _("Invalid key size %d.\n"), key_size); - return -EINVAL; - } + device_check = DEV_EXCL; - r = device_check_and_adjust(cd, cd->device, !reload, &size, &offset, &read_only); + r = device_block_adjust(cd, dmd.data_device, device_check, + dmd.u.crypt.offset, &dmd.size, &dmd.flags); if (r) return r; - if (cipher_mode && asprintf(&dm_cipher, "%s-%s", cipher, cipher_mode) < 0) + if (crypt_get_cipher_mode(cd)) + r = asprintf(&dm_cipher, "%s-%s", crypt_get_cipher(cd), crypt_get_cipher_mode(cd)); + else + r = asprintf(&dm_cipher, "%s", crypt_get_cipher(cd)); + if (r < 0) return -ENOMEM; - processed_key = process_key(cd, hash, key_file, key_size, key, keyLen); - if (!processed_key) { - r = -ENOENT; - goto out; - } - - r = dm_create_device(name, cd->device, dm_cipher ?: cipher, cd->type, uuid, size, skip, offset, - key_size, processed_key, read_only, reload); -out: - free(dm_cipher); - crypt_safe_free(processed_key); - return r; -} - -static int open_from_hdr_and_vk(struct crypt_device *cd, - struct volume_key *vk, - const char *name, - uint32_t flags) -{ - uint64_t size, offset; - char *cipher; - int read_only, no_uuid, r; + dmd.u.crypt.cipher = dm_cipher; + log_dbg("Trying to activate PLAIN device %s using cipher %s.", + name, dmd.u.crypt.cipher); - size = 0; - offset = crypt_get_data_offset(cd); - read_only = flags & CRYPT_ACTIVATE_READONLY; - no_uuid = flags & CRYPT_ACTIVATE_NO_UUID; + r = dm_create_device(cd, name, CRYPT_PLAIN, &dmd, 0); - r = device_check_and_adjust(cd, cd->device, 1, &size, &offset, &read_only); - if (r) - return r; + // FIXME + if (!cd->plain_uuid && dm_query_device(cd, name, DM_ACTIVE_UUID, &dmd) >= 0) + cd->plain_uuid = CONST_CAST(char*)dmd.uuid; - if (asprintf(&cipher, "%s-%s", crypt_get_cipher(cd), - crypt_get_cipher_mode(cd)) < 0) - r = -ENOMEM; - else - r = dm_create_device(name, cd->device, cipher, cd->type, - no_uuid ? NULL : crypt_get_uuid(cd), - size, 0, offset, vk->keylength, vk->key, - read_only, 0); - free(cipher); + free(dm_cipher); return r; } -static void log_wrapper(int level, const char *msg, void *usrptr) -{ - void (*xlog)(int level, char *msg) = usrptr; - xlog(level, (char *)msg); -} - -static int yesDialog_wrapper(const char *msg, void *usrptr) -{ - int (*xyesDialog)(char *msg) = usrptr; - return xyesDialog((char*)msg); -} - int crypt_confirm(struct crypt_device *cd, const char *msg) { if (!cd || !cd->confirm) @@ -440,33 +373,41 @@ int crypt_confirm(struct crypt_device *cd, const char *msg) } static int key_from_terminal(struct crypt_device *cd, char *msg, char **key, - unsigned int *key_len, int force_verify) + 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->device) < 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(MAX_TTY_PASSWORD_LEN); + *key = crypt_safe_alloc(DEFAULT_PASSPHRASE_SIZE_MAX); if (!*key) { r = -ENOMEM; goto out; } - r = cd->password(msg, *key, MAX_TTY_PASSWORD_LEN, cd->password_usrptr); + r = cd->password(msg, *key, DEFAULT_PASSPHRASE_SIZE_MAX, + cd->password_usrptr); if (r < 0) { crypt_safe_free(*key); *key = NULL; } else *key_len = r; } else - r = crypt_get_key(msg, key, key_len, 0, NULL, cd->timeout, + r = crypt_get_key(msg, key, key_len, 0, 0, NULL, cd->timeout, (force_verify || cd->password_verify), cd); out: free(prompt); @@ -477,8 +418,8 @@ static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslo struct volume_key **vk) { char *passphrase_read = NULL; - unsigned int passphrase_size_read; - int r = -EINVAL, tries = cd->tries; + size_t passphrase_size_read; + int r = -EINVAL, eperm = 0, tries = cd->tries; *vk = NULL; do { @@ -487,11 +428,16 @@ static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslo r = key_from_terminal(cd, NULL, &passphrase_read, &passphrase_size_read, 0); + /* Continue if it is just passphrase verify mismatch */ + if (r == -EPERM) + continue; if(r < 0) goto out; - r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read, + r = LUKS_open_key_with_hdr(keyslot, passphrase_read, passphrase_size_read, &cd->hdr, vk, cd); + if (r == -EPERM) + eperm = 1; crypt_safe_free(passphrase_read); passphrase_read = NULL; } while (r == -EPERM && (--tries > 0)); @@ -499,6 +445,10 @@ out: if (r < 0) { crypt_free_volume_key(*vk); *vk = NULL; + + /* Report wrong passphrase if at least one try failed */ + if (eperm && r == -EPIPE) + r = -EPERM; } crypt_safe_free(passphrase_read); @@ -506,61 +456,14 @@ out: } static int key_from_file(struct crypt_device *cd, char *msg, - char **key, unsigned int *key_len, - const char *key_file, size_t key_size) + char **key, size_t *key_len, + const char *key_file, size_t key_offset, + size_t key_size) { - return crypt_get_key(msg, key, key_len, key_size, key_file, + return crypt_get_key(msg, key, key_len, key_offset, key_size, key_file, cd->timeout, 0, cd); } -static int _crypt_init(struct crypt_device **cd, - const char *type, - struct crypt_options *options, - int load, int need_dm) -{ - int init_by_name, r; - - /* if it is plain device and mapping table is being reloaded - initialize it by name*/ - init_by_name = (type && !strcmp(type, CRYPT_PLAIN) && load); - - /* Some of old API calls do not require DM in kernel, - fake initialisation by initialise it with kernel_check disabled */ - if (!need_dm) - (void)dm_init(NULL, 0); - if (init_by_name) - r = crypt_init_by_name(cd, options->name); - else - r = crypt_init(cd, options->device); - if (!need_dm) - dm_exit(); - - if (r) - return -EINVAL; - - crypt_set_log_callback(*cd, log_wrapper, options->icb->log); - crypt_set_confirm_callback(*cd, yesDialog_wrapper, options->icb->yesDialog); - - crypt_set_timeout(*cd, options->timeout); - crypt_set_password_retry(*cd, options->tries); - crypt_set_iterarion_time(*cd, options->iteration_time ?: 1000); - crypt_set_password_verify(*cd, options->flags & CRYPT_FLAG_VERIFY); - - if (load && !init_by_name) - r = crypt_load(*cd, type, NULL); - - if (!r && type && !(*cd)->type) { - (*cd)->type = strdup(type); - if (!(*cd)->type) - r = -ENOMEM; - } - - if (r) - crypt_free(*cd); - - return r; -} - void crypt_set_log_callback(struct crypt_device *cd, void (*log)(int level, const char *msg, void *usrptr), void *usrptr) @@ -589,438 +492,321 @@ void crypt_set_password_callback(struct crypt_device *cd, cd->password_usrptr = usrptr; } -/* OPTIONS: name, cipher, device, hash, key_file, key_size, key_slot, - * offset, size, skip, timeout, tries, passphrase_fd (ignored), - * flags, icb */ -static int crypt_create_and_update_device(struct crypt_options *options, int update) +static void _get_error(char *error, char *buf, size_t size) { - struct crypt_device *cd = NULL; - char *key = NULL; - unsigned int keyLen; - int r; - - r = _crypt_init(&cd, CRYPT_PLAIN, options, 0, 1); - if (r) - return r; - - r = crypt_get_key(_("Enter passphrase: "), &key, &keyLen, options->key_size, - options->key_file, cd->timeout, cd->password_verify, cd); - if (!r) - r = create_device_helper(cd, options->name, options->hash, - options->cipher, NULL, options->key_file, key, keyLen, - options->key_size, options->size, options->skip, - options->offset, NULL, options->flags & CRYPT_FLAG_READONLY, - options->flags, update); - - crypt_safe_free(key); - crypt_free(cd); - return r; + if (!buf || size < 1) + error[0] = '\0'; + else if (*error) { + strncpy(buf, error, size - 1); + buf[size - 1] = '\0'; + error[0] = '\0'; + } else + buf[0] = '\0'; } -int crypt_create_device(struct crypt_options *options) +void crypt_last_error(struct crypt_device *cd, char *buf, size_t size) { - return crypt_create_and_update_device(options, 0); + if (cd) + return _get_error(cd->error, buf, size); } -int crypt_update_device(struct crypt_options *options) +/* Deprecated global error interface */ +void crypt_get_error(char *buf, size_t size) { - return crypt_create_and_update_device(options, 1); + return _get_error(global_error, buf, size); } -/* OPTIONS: name, size, icb */ -int crypt_resize_device(struct crypt_options *options) +const char *crypt_get_dir(void) { - struct crypt_device *cd = NULL; - char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL; - char *type = NULL; - uint64_t size, skip, offset; - int key_size, read_only, r; + return dm_get_dir(); +} - log_dbg("Resizing device %s to %" PRIu64 " sectors.", options->name, options->size); +int crypt_init(struct crypt_device **cd, const char *device) +{ + struct crypt_device *h = NULL; + int r; - if (dm_init(NULL, 1) < 0) - return -ENOSYS; + if (!cd) + return -EINVAL; - r = dm_query_device(options->name, &device, &size, &skip, &offset, - &cipher, &key_size, &key, &read_only, NULL, &uuid); - if (r < 0) { - log_err(NULL, _("Device %s is not active.\n"), options->name); - goto out; - } + log_dbg("Allocating crypt device %s context.", device); - /* Try to determine type of device from UUID */ - type = CRYPT_PLAIN; - if (uuid) { - if (!strncmp(uuid, CRYPT_PLAIN, strlen(CRYPT_PLAIN))) { - type = CRYPT_PLAIN; - free (uuid); - uuid = NULL; - } else if (!strncmp(uuid, CRYPT_LUKS1, strlen(CRYPT_LUKS1))) - type = CRYPT_LUKS1; - } + if (!(h = malloc(sizeof(struct crypt_device)))) + return -ENOMEM; - if (!options->device) - options->device = device; + memset(h, 0, sizeof(*h)); - r = _crypt_init(&cd, type, options, 1, 1); - if (r) - goto out; + r = device_alloc(&h->device, device); + if (r < 0) + goto bad; - size = options->size; - r = device_check_and_adjust(cd, device, 0, &size, &offset, &read_only); - if (r) - goto out; + dm_backend_init(); - r = dm_create_device(options->name, device, cipher, type, - crypt_get_uuid(cd), size, skip, offset, - key_size, key, read_only, 1); -out: - crypt_safe_free(key); - free(cipher); - if (options->device == device) - options->device = NULL; - free(device); - free(uuid); - crypt_free(cd); - dm_exit(); + h->iteration_time = 1000; + h->password_verify = 0; + h->tries = 3; + h->rng_type = crypt_random_default_key_rng(); + *cd = h; + return 0; +bad: + device_free(h->device); + free(h); return r; } -/* OPTIONS: name, icb */ -int crypt_query_device(struct crypt_options *options) +static int crypt_check_data_device_size(struct crypt_device *cd) { - int read_only, r; - - log_dbg("Query device %s.", options->name); + int r; + uint64_t size, size_min; - if (dm_init(NULL, 1) < 0) - return -ENOSYS; + /* Check data device size, require at least one sector */ + size_min = crypt_get_data_offset(cd) << SECTOR_SHIFT ?: SECTOR_SIZE; - r = dm_status_device(options->name); + r = device_size(cd->device, &size); if (r < 0) - goto out; - - r = dm_query_device(options->name, (char **)&options->device, &options->size, - &options->skip, &options->offset, (char **)&options->cipher, - &options->key_size, NULL, &read_only, NULL, NULL); - if (r >= 0) { - if (read_only) - options->flags |= CRYPT_FLAG_READONLY; - - options->flags |= CRYPT_FLAG_FREE_DEVICE; - options->flags |= CRYPT_FLAG_FREE_CIPHER; + return r; - r = 1; + if (size < size_min) { + log_err(cd, _("Header detected but device %s is too small.\n"), + device_path(cd->device)); + return -EINVAL; } -out: - if (r == -ENODEV) - r = 0; - dm_exit(); return r; } -/* OPTIONS: name, icb */ -int crypt_remove_device(struct crypt_options *options) +int crypt_set_data_device(struct crypt_device *cd, const char *device) { - struct crypt_device *cd = NULL; + struct device *dev = NULL; int r; - r = crypt_init_by_name(&cd, options->name); - if (r == 0) - r = crypt_deactivate(cd, options->name); + log_dbg("Setting ciphertext data device to %s.", device ?: "(none)"); - crypt_free(cd); - return r; + if (!isLUKS(cd->type) && !isVERITY(cd->type)) { + log_err(cd, _("This operation is not supported for this device type.\n")); + return -EINVAL; + } -} + /* metadata device must be set */ + if (!cd->device || !device) + return -EINVAL; -/* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot - * new_key_file, iteration_time, timeout, flags, icb */ -int crypt_luksFormat(struct crypt_options *options) -{ - char cipherName[LUKS_CIPHERNAME_L]; - char cipherMode[LUKS_CIPHERMODE_L]; - char *password=NULL; - unsigned int passwordLen; - struct crypt_device *cd = NULL; - struct crypt_params_luks1 cp = { - .hash = options->hash, - .data_alignment = options->align_payload - }; - int r; - - r = crypt_parse_name_and_mode(options->cipher, cipherName, cipherMode); - if(r < 0) { - log_err(cd, _("No known cipher specification pattern detected.\n")); - return r; - } - - if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1))) + r = device_alloc(&dev, device); + if (r < 0) return r; - if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) { - log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"), - options->key_slot, LUKS_NUMKEYS - 1); - r = -EINVAL; - goto out; - } - - r = crypt_get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0, - options->new_key_file, cd->timeout, cd->password_verify, cd); + if (!cd->metadata_device) { + cd->metadata_device = cd->device; + } else + device_free(cd->device); - if(r < 0) - goto out; + cd->device = dev; - r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode, - NULL, NULL, options->key_size, &cp); - if (r < 0) - goto out; - - /* Add keyslot using internally stored volume key generated during format */ - r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0, - password, passwordLen); -out: - crypt_free(cd); - crypt_safe_free(password); - return (r < 0) ? r : 0; + return crypt_check_data_device_size(cd); } -/* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */ -int crypt_luksOpen(struct crypt_options *options) +static int _crypt_load_luks1(struct crypt_device *cd, int require_header, int repair) { - struct crypt_device *cd = NULL; - uint32_t flags = 0; + struct luks_phdr hdr; int r; - if (!options->name) - return -EINVAL; - - r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1); - if (r) + r = init_crypto(cd); + if (r < 0) return r; - if (options->flags & CRYPT_FLAG_READONLY) - flags |= CRYPT_ACTIVATE_READONLY; - - if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS) - flags |= CRYPT_ACTIVATE_NO_UUID; - - if (options->key_file) - r = crypt_activate_by_keyfile(cd, options->name, - CRYPT_ANY_SLOT, options->key_file, options->key_size, - flags); - else - r = crypt_activate_by_passphrase(cd, options->name, - CRYPT_ANY_SLOT, options->passphrase, - options->passphrase ? strlen(options->passphrase) : 0, - flags); - - crypt_free(cd); - return (r < 0) ? r : 0; -} - -/* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */ -int crypt_luksKillSlot(struct crypt_options *options) -{ - struct crypt_device *cd = NULL; - int r; - - r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1); - if (r) + r = LUKS_read_phdr(&hdr, require_header, repair, cd); + if (r < 0) return r; - r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL, - options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY); + if (!cd->type && !(cd->type = strdup(CRYPT_LUKS1))) + return -ENOMEM; + + memcpy(&cd->hdr, &hdr, sizeof(hdr)); - crypt_free(cd); - return (r < 0) ? r : 0; + return r; } -/* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */ -int crypt_luksRemoveKey(struct crypt_options *options) +static int _crypt_load_tcrypt(struct crypt_device *cd, struct crypt_params_tcrypt *params) { - struct crypt_device *cd = NULL; int r; - r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1); - if (r) + r = init_crypto(cd); + if (r < 0) return r; - r = luks_remove_helper(cd, CRYPT_ANY_SLOT, options->key_file, options->new_key_file, - options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY); - - crypt_free(cd); - return (r < 0) ? r : 0; -} + memcpy(&cd->tcrypt_params, params, sizeof(*params)); + r = TCRYPT_read_phdr(cd, &cd->tcrypt_hdr, &cd->tcrypt_params); -/* OPTIONS: device, new_key_file, key_file, key_slot, flags, - iteration_time, timeout, icb */ -int crypt_luksAddKey(struct crypt_options *options) -{ - struct crypt_device *cd = NULL; - int r = -EINVAL; + cd->tcrypt_params.passphrase = NULL; + cd->tcrypt_params.passphrase_size = 0; + cd->tcrypt_params.keyfiles = NULL; + cd->tcrypt_params.keyfiles_count = 0; - r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1); - if (r) + if (r < 0) return r; - if (options->key_file || options->new_key_file) - r = crypt_keyslot_add_by_keyfile(cd, options->key_slot, - options->key_file, 0, - options->new_key_file, 0); - else - r = crypt_keyslot_add_by_passphrase(cd, options->key_slot, - NULL, 0, NULL, 0); + if (!cd->type && !(cd->type = strdup(CRYPT_TCRYPT))) + return -ENOMEM; - crypt_free(cd); - return (r < 0) ? r : 0; + return r; } -/* OPTIONS: device, icb */ -int crypt_luksUUID(struct crypt_options *options) +static int _crypt_load_verity(struct crypt_device *cd, struct crypt_params_verity *params) { - struct crypt_device *cd = NULL; - char *uuid; int r; + size_t sb_offset = 0; - r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0); - if (r) + r = init_crypto(cd); + if (r < 0) return r; - uuid = (char *)crypt_get_uuid(cd); - log_std(cd, uuid ?: ""); - log_std(cd, "\n"); - crypt_free(cd); - return 0; -} - -/* OPTIONS: device, icb */ -int crypt_isLuks(struct crypt_options *options) -{ - struct crypt_device *cd = NULL; - int r; + if (params && params->flags & CRYPT_VERITY_NO_HEADER) + return -EINVAL; - log_dbg("Check device %s for LUKS header.", options->device); + if (params) + sb_offset = params->hash_area_offset; - r = init_crypto(cd); + r = VERITY_read_sb(cd, sb_offset, &cd->verity_uuid, &cd->verity_hdr); if (r < 0) return r; - r = crypt_init(&cd, options->device); - if (r < 0) - return -EINVAL; - - /* Do print fail here, no need to crypt_load() */ - r = LUKS_read_phdr(cd->device, &cd->hdr, 0, cd) ? -EINVAL : 0; + if (params) + cd->verity_hdr.flags = params->flags; - crypt_free(cd); - return r; -} + /* Hash availability checked in sb load */ + cd->verity_root_hash_size = crypt_hash_size(cd->verity_hdr.hash_name); + if (cd->verity_root_hash_size > 4096) + return -EINVAL; -/* OPTIONS: device, icb */ -int crypt_luksDump(struct crypt_options *options) -{ - struct crypt_device *cd = NULL; - int r; + if (!cd->type && !(cd->type = strdup(CRYPT_VERITY))) + return -ENOMEM; - r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0); - if(r < 0) + if (params && params->data_device && + (r = crypt_set_data_device(cd, params->data_device)) < 0) return r; - r = crypt_dump(cd); - - crypt_free(cd); - return 0; + return r; } -void crypt_get_error(char *buf, size_t size) +static int _init_by_name_crypt(struct crypt_device *cd, const char *name) { - const char *error = get_error(); + struct crypt_dm_active_device dmd = {}; + char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN]; + int key_nums, r; - if (!buf || size < 1) - set_error(NULL); - else if (error) { - strncpy(buf, error, size - 1); - buf[size - 1] = '\0'; - set_error(NULL); - } else - buf[0] = '\0'; -} + 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; -void crypt_put_options(struct crypt_options *options) -{ - if (options->flags & CRYPT_FLAG_FREE_DEVICE) { - free((char *)options->device); - options->device = NULL; - options->flags &= ~CRYPT_FLAG_FREE_DEVICE; - } - if (options->flags & CRYPT_FLAG_FREE_CIPHER) { - free((char *)options->cipher); - options->cipher = NULL; - options->flags &= ~CRYPT_FLAG_FREE_CIPHER; + 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; + + 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); + } + } else if (isLOOPAES(cd->type)) { + cd->loopaes_uuid = dmd.uuid ? strdup(dmd.uuid) : NULL; + cd->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); + /* 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; + } + } else if (isLUKS(cd->type)) { + 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."); + free(cd->type); + cd->type = NULL; + r = 0; + goto out; + } + /* check whether UUIDs match each other */ + r = crypt_uuid_cmp(dmd.uuid, cd->hdr.uuid); + if (r < 0) { + log_dbg("LUKS device header uuid: %s mismatches DM returned uuid %s", + cd->hdr.uuid, dmd.uuid); + free(cd->type); + cd->type = NULL; + r = 0; + goto out; + } + } } +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.uuid); + return r; } -const char *crypt_get_dir(void) -{ - return dm_get_dir(); -} - -///////////////////////////////// -// -// New API -// - -int crypt_init(struct crypt_device **cd, const char *device) +static int _init_by_name_verity(struct crypt_device *cd, const char *name) { - struct crypt_device *h = NULL; - - if (!cd) - return -EINVAL; - - log_dbg("Allocating crypt device %s context.", device); - - if (device && !device_ready(NULL, device, O_RDONLY)) - return -ENOTBLK; - - if (!(h = malloc(sizeof(struct crypt_device)))) - return -ENOMEM; - - memset(h, 0, sizeof(*h)); + struct crypt_params_verity params = {}; + struct crypt_dm_active_device dmd = { + .target = DM_VERITY, + .u.verity.vp = ¶ms, + }; + int r; - if (device) { - h->device = strdup(device); - if (!h->device) { - free(h); - return -ENOMEM; - } - } else - h->device = NULL; + 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 (dm_init(h, 1) < 0) { - free(h); - return -ENOSYS; + if (isVERITY(cd->type)) { + cd->verity_uuid = dmd.uuid ? strdup(dmd.uuid) : NULL; + cd->verity_hdr.flags = CRYPT_VERITY_NO_HEADER; //FIXME + 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; + cd->metadata_device = dmd.u.verity.hash_device; } - - h->iteration_time = 1000; - h->password_verify = 0; - h->tries = 3; - h->rng_type = crypt_random_default_key_rng(); - *cd = h; - return 0; +out: + device_free(dmd.data_device); + free(CONST_CAST(void*)dmd.uuid); + return r; } -int crypt_init_by_name(struct crypt_device **cd, const char *name) +int crypt_init_by_name_and_header(struct crypt_device **cd, + const char *name, + const char *header_device) { crypt_status_info ci; - struct crypt_active_device cad; - char *device = NULL, *cipher_full = NULL, *device_uuid = NULL; - char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN]; - char *key = NULL; - int key_size = 0, r; - + struct crypt_dm_active_device dmd; + int r; log_dbg("Allocating crypt device context by device %s.", name); @@ -1033,71 +819,74 @@ int crypt_init_by_name(struct crypt_device **cd, const char *name) return -ENODEV; } - r = dm_query_device(name, &device, &cad.size, &cad.iv_offset, &cad.offset, - &cipher_full, &key_size, &key, NULL, NULL, - &device_uuid); + r = dm_query_device(NULL, name, DM_ACTIVE_DEVICE | DM_ACTIVE_UUID, &dmd); if (r < 0) goto out; - /* Underlying device disappeared but mapping still active */ - if (!device) - log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"), - name); - *cd = NULL; - r = crypt_init(cd, device); + + if (header_device) { + r = crypt_init(cd, header_device); + } else { + r = crypt_init(cd, device_path(dmd.data_device)); + + /* Underlying device disappeared but mapping still active */ + if (!dmd.data_device || r == -ENOTBLK) + log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"), + name); + + /* Underlying device is not readable but crypt mapping exists */ + if (r == -ENOTBLK) { + device_free(dmd.data_device); + dmd.data_device = NULL; + r = crypt_init(cd, NULL); + } + } + if (r < 0) goto out; - /* Try to initialise basic parameters from active device */ - if (device_uuid) { - if (!strncmp(CRYPT_PLAIN, device_uuid, sizeof(CRYPT_PLAIN)-1)) { + if (dmd.uuid) { + if (!strncmp(CRYPT_PLAIN, dmd.uuid, sizeof(CRYPT_PLAIN)-1)) (*cd)->type = strdup(CRYPT_PLAIN); - (*cd)->plain_uuid = strdup(device_uuid); - (*cd)->plain_hdr.hash = NULL; /* no way to get this */ - (*cd)->plain_hdr.offset = cad.offset; - (*cd)->plain_hdr.skip = cad.iv_offset; - (*cd)->volume_key = crypt_alloc_volume_key(key_size, key); - if (!(*cd)->volume_key) { - r = -ENOMEM; - goto out; - } - - r = crypt_parse_name_and_mode(cipher_full, cipher, cipher_mode); - if (!r) { - (*cd)->plain_cipher = strdup(cipher); - (*cd)->plain_cipher_mode = strdup(cipher_mode); - } - } else if (!strncmp(CRYPT_LUKS1, device_uuid, sizeof(CRYPT_LUKS1)-1)) { - if (device) { - if (crypt_load(*cd, CRYPT_LUKS1, NULL) < 0 || - crypt_volume_key_verify(*cd, key, key_size) < 0) { - log_dbg("LUKS device header does not match active device."); - goto out; - } - - (*cd)->volume_key = crypt_alloc_volume_key(key_size, key); - if (!(*cd)->volume_key) { - r = -ENOMEM; - goto out; - } - } - } + else if (!strncmp(CRYPT_LOOPAES, dmd.uuid, sizeof(CRYPT_LOOPAES)-1)) + (*cd)->type = strdup(CRYPT_LOOPAES); + else if (!strncmp(CRYPT_LUKS1, dmd.uuid, sizeof(CRYPT_LUKS1)-1)) + (*cd)->type = strdup(CRYPT_LUKS1); + else if (!strncmp(CRYPT_VERITY, dmd.uuid, sizeof(CRYPT_VERITY)-1)) + (*cd)->type = strdup(CRYPT_VERITY); + 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, device_path(dmd.data_device)); + if (r < 0) + goto out; + } + + /* Try to initialise basic parameters from active device */ + + if (dmd.target == DM_CRYPT) + r = _init_by_name_crypt(*cd, name); + else if (dmd.target == DM_VERITY) + r = _init_by_name_verity(*cd, name); out: if (r < 0) { crypt_free(*cd); *cd = NULL; } - crypt_safe_free(key); - free(device); - free(cipher_full); - free(device_uuid); + device_free(dmd.data_device); + free(CONST_CAST(void*)dmd.uuid); return r; } +int crypt_init_by_name(struct crypt_device **cd, const char *name) +{ + return crypt_init_by_name_and_header(cd, name, NULL); +} + static int _crypt_format_plain(struct crypt_device *cd, const char *cipher, const char *cipher_mode, @@ -1115,6 +904,10 @@ static int _crypt_format_plain(struct crypt_device *cd, return -EINVAL; } + if (!(cd->type = strdup(CRYPT_PLAIN))) + return -ENOMEM; + + cd->plain_key_size = volume_key_size; cd->volume_key = crypt_alloc_volume_key(volume_key_size, NULL); if (!cd->volume_key) return -ENOMEM; @@ -1130,6 +923,7 @@ static int _crypt_format_plain(struct crypt_device *cd, cd->plain_hdr.offset = params ? params->offset : 0; cd->plain_hdr.skip = params ? params->skip : 0; + cd->plain_hdr.size = params ? params->size : 0; if (!cd->plain_cipher || !cd->plain_cipher_mode) return -ENOMEM; @@ -1149,11 +943,14 @@ static int _crypt_format_luks1(struct crypt_device *cd, unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT; unsigned long alignment_offset = 0; - if (!cd->device) { + 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); @@ -1163,36 +960,191 @@ static int _crypt_format_luks1(struct crypt_device *cd, if(!cd->volume_key) return -ENOMEM; - if (params && params->data_alignment) + if (params && params->data_device) { + cd->metadata_device = cd->device; + cd->device = NULL; + if (device_alloc(&cd->device, params->data_device) < 0) + return -ENOMEM; required_alignment = params->data_alignment * SECTOR_SIZE; - else - get_topology_alignment(cd->device, &required_alignment, + } else if (params && params->data_alignment) { + required_alignment = params->data_alignment * SECTOR_SIZE; + } else + device_topology_alignment(cd->device, + &required_alignment, &alignment_offset, DEFAULT_DISK_ALIGNMENT); + /* 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->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); + cd->iteration_time, &cd->PBKDF2_per_sec, + cd->metadata_device ? 1 : 0, cd); if(r < 0) return r; /* Wipe first 8 sectors - fs magic numbers etc. */ - r = wipe_device_header(cd->device, 8); + 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"), - cd->device); - 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"), - cd->device); + mdata_device_path(cd)); + + return r; + } + + r = LUKS_write_phdr(&cd->hdr, cd); + + return r; +} + +static int _crypt_format_loopaes(struct crypt_device *cd, + const char *cipher, + const char *uuid, + size_t volume_key_size, + struct crypt_params_loopaes *params) +{ + if (!crypt_metadata_device(cd)) { + log_err(cd, _("Can't format LOOPAES without device.\n")); + return -EINVAL; + } + + if (volume_key_size > 1024) { + log_err(cd, _("Invalid key size.\n")); + return -EINVAL; + } + + if (!(cd->type = strdup(CRYPT_LOOPAES))) + return -ENOMEM; + + cd->loopaes_key_size = volume_key_size; + + cd->loopaes_cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER); + + if (uuid) + cd->loopaes_uuid = strdup(uuid); + + if (params && params->hash) + cd->loopaes_hdr.hash = strdup(params->hash); + + cd->loopaes_hdr.offset = params ? params->offset : 0; + cd->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, hash_size; + uint64_t data_device_size; + + if (!crypt_metadata_device(cd)) { + log_err(cd, _("Can't format VERITY without device.\n")); + return -EINVAL; + } + + if (!params || !params->data_device) + return -EINVAL; + + 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); + if (r) + return r; + if (!params->data_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; + } else + cd->verity_hdr.data_size = params->data_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->verity_root_hash_size = hash_size; + + cd->verity_root_hash = malloc(cd->verity_root_hash_size); + if (!cd->verity_root_hash) + return -ENOMEM; + cd->verity_hdr.flags = params->flags; + if (!(cd->verity_hdr.hash_name = strdup(params->hash_name))) + return -ENOMEM; + 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; + if (!(cd->verity_hdr.salt = malloc(params->salt_size))) + return -ENOMEM; + + if (params->salt) + memcpy(CONST_CAST(char*)cd->verity_hdr.salt, params->salt, + params->salt_size); + else + r = crypt_random_get(cd, CONST_CAST(char*)cd->verity_hdr.salt, + params->salt_size, CRYPT_RND_SALT); + if (r) return r; + + if (params->flags & CRYPT_VERITY_CREATE_HASH) { + r = VERITY_create(cd, &cd->verity_hdr, + cd->verity_root_hash, cd->verity_root_hash_size); + if (r) + return r; } - r = LUKS_write_phdr(cd->device, &cd->hdr, cd); + if (!(params->flags & CRYPT_VERITY_NO_HEADER)) { + if (uuid) + cd->verity_uuid = strdup(uuid); + else { + r = VERITY_UUID_generate(cd, &cd->verity_uuid); + if (r) + return r; + } + r = VERITY_write_sb(cd, cd->verity_hdr.hash_area_offset, + cd->verity_uuid, + &cd->verity_hdr); + } return r; } @@ -1207,11 +1159,16 @@ int crypt_format(struct crypt_device *cd, { int r; - log_dbg("Formatting device %s as type %s.", cd->device ?: "(none)", cd->type ?: "(none)"); - if (!type) return -EINVAL; + if (cd->type) { + log_dbg("Context already formatted as %s.", cd->type); + return -EINVAL; + } + + log_dbg("Formatting device %s as type %s.", mdata_device_path(cd) ?: "(none)", type); + r = init_crypto(cd); if (r < 0) return r; @@ -1222,16 +1179,18 @@ int crypt_format(struct crypt_device *cd, else if (isLUKS(type)) r = _crypt_format_luks1(cd, cipher, cipher_mode, uuid, volume_key, volume_key_size, params); + else if (isLOOPAES(type)) + r = _crypt_format_loopaes(cd, cipher, uuid, volume_key_size, params); + else if (isVERITY(type)) + 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; } @@ -1239,33 +1198,69 @@ int crypt_format(struct crypt_device *cd, return r; } -int crypt_load(struct crypt_device *cd, - const char *requested_type, - void *params) +int crypt_load(struct crypt_device *cd, + const char *requested_type, + void *params) +{ + int r; + + log_dbg("Trying to load %s crypt type from device %s.", + requested_type ?: "any", mdata_device_path(cd) ?: "(none)"); + + if (!crypt_metadata_device(cd)) + return -EINVAL; + + if (!requested_type || isLUKS(requested_type)) { + if (cd->type && !isLUKS(cd->type)) { + log_dbg("Context is already initialised to type %s", cd->type); + return -EINVAL; + } + + r = _crypt_load_luks1(cd, 1, 0); + } else if (isVERITY(requested_type)) { + if (cd->type && !isVERITY(cd->type)) { + log_dbg("Context is already initialised to type %s", cd->type); + 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; + + return r; +} + +int crypt_repair(struct crypt_device *cd, + const char *requested_type, + void *params __attribute__((unused))) { - struct luks_phdr hdr; int r; - log_dbg("Trying to load %s crypt type from device %s.", - requested_type ?: "any", cd->device ?: "(none)"); + log_dbg("Trying to repair %s crypt type from device %s.", + requested_type ?: "any", mdata_device_path(cd) ?: "(none)"); - if (!cd->device) + if (!crypt_metadata_device(cd)) return -EINVAL; if (requested_type && !isLUKS(requested_type)) return -EINVAL; - r = init_crypto(cd); + + /* Load with repair */ + r = _crypt_load_luks1(cd, 1, 1); if (r < 0) return r; - r = LUKS_read_phdr(cd->device, &hdr, 1, cd); - - if (!r) { - memcpy(&cd->hdr, &hdr, sizeof(hdr)); - cd->type = strdup(requested_type); - if (!cd->type) - r = -ENOMEM; + /* 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; @@ -1273,47 +1268,48 @@ int crypt_load(struct crypt_device *cd, int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size) { - char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL; - uint64_t size, skip, offset; - int key_size, read_only, r; + struct crypt_dm_active_device dmd; + int r; /* Device context type must be initialised */ if (!cd->type || !crypt_get_uuid(cd)) return -EINVAL; - r = dm_query_device(name, &device, &size, &skip, &offset, - &cipher, &key_size, &key, &read_only, NULL, &uuid); + log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size); + + 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) { log_err(NULL, _("Device %s is not active.\n"), name); - goto out; + return -EINVAL; } - if (!uuid) { + if (!dmd.uuid || dmd.target != DM_CRYPT) { r = -EINVAL; goto out; } - r = device_check_and_adjust(cd, device, 0, &new_size, &offset, &read_only); + r = device_block_adjust(cd, dmd.data_device, DEV_OK, + dmd.u.crypt.offset, &new_size, &dmd.flags); if (r) goto out; - if (new_size == size) { + if (new_size == dmd.size) { log_dbg("Device has already requested size %" PRIu64 - " sectors.", size); + " sectors.", dmd.size); r = 0; - goto out; + } else { + dmd.size = new_size; + r = dm_create_device(cd, name, cd->type, &dmd, 1); } - - log_dbg("Resizing device %s to %" PRIu64 " sectors.", name, new_size); - - r = dm_create_device(name, device, cipher, cd->type, - crypt_get_uuid(cd), new_size, skip, offset, - key_size, key, read_only, 1); out: - crypt_safe_free(key); - free(cipher); - free(device); - free(uuid); + if (dmd.target == DM_CRYPT) { + crypt_free_volume_key(dmd.u.crypt.vk); + free(CONST_CAST(void*)dmd.u.crypt.cipher); + } + free(CONST_CAST(void*)dmd.data_device); + free(CONST_CAST(void*)dmd.uuid); return r; } @@ -1327,19 +1323,19 @@ int crypt_set_uuid(struct crypt_device *cd, const char *uuid) if (uuid && !strncmp(uuid, cd->hdr.uuid, sizeof(cd->hdr.uuid))) { log_dbg("UUID is the same as requested (%s) for device %s.", - uuid, cd->device); + uuid, mdata_device_path(cd)); return 0; } if (uuid) - log_dbg("Requested new UUID change to %s for %s.", uuid, cd->device); + log_dbg("Requested new UUID change to %s for %s.", uuid, mdata_device_path(cd)); else - log_dbg("Requested new UUID refresh for %s.", cd->device); + 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(cd->device, &cd->hdr, uuid, cd); + return LUKS_hdr_uuid_set(&cd->hdr, uuid, cd); } int crypt_header_backup(struct crypt_device *cd, @@ -1356,9 +1352,9 @@ int crypt_header_backup(struct crypt_device *cd, return r; log_dbg("Requested header backup of device %s (%s) to " - "file %s.", cd->device, requested_type, backup_file); + "file %s.", mdata_device_path(cd), requested_type, backup_file); - return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd); + return LUKS_hdr_backup(backup_file, &cd->hdr, cd); } int crypt_header_restore(struct crypt_device *cd, @@ -1370,34 +1366,45 @@ int crypt_header_restore(struct crypt_device *cd, if (requested_type && !isLUKS(requested_type)) return -EINVAL; - /* Some hash functions need initialized gcrypt library */ r = init_crypto(cd); if (r < 0) return r; log_dbg("Requested header restore to device %s (%s) from " - "file %s.", cd->device, requested_type, backup_file); + "file %s.", mdata_device_path(cd), requested_type, backup_file); - return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd); + return LUKS_hdr_restore(backup_file, &cd->hdr, cd); } void crypt_free(struct crypt_device *cd) { if (cd) { - log_dbg("Releasing crypt device %s context.", cd->device); + 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); + device_free(cd->device); + device_free(cd->metadata_device); free(cd->type); /* used in plain device only */ - free((char*)cd->plain_hdr.hash); + 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); + free(cd->verity_uuid); + free(cd); } } @@ -1406,38 +1413,41 @@ int crypt_suspend(struct crypt_device *cd, const char *name) { crypt_status_info ci; - int r, suspended = 0; + int r; log_dbg("Suspending volume %s.", name); + if (!cd || !isLUKS(cd->type)) { + log_err(cd, _("This operation is supported only for LUKS device.\n")); + r = -EINVAL; + goto out; + } + ci = crypt_status(NULL, name); if (ci < CRYPT_ACTIVE) { log_err(cd, _("Volume %s is not active.\n"), name); return -EINVAL; } - if (!cd && dm_init(NULL, 1) < 0) - return -ENOSYS; + dm_backend_init(); - r = dm_query_device(name, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, &suspended, NULL); + r = dm_status_suspended(cd, name); if (r < 0) goto out; - if (suspended) { + if (r) { log_err(cd, _("Volume %s is already suspended.\n"), name); r = -EINVAL; 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; } @@ -1448,7 +1458,7 @@ int crypt_resume_by_passphrase(struct crypt_device *cd, size_t passphrase_size) { struct volume_key *vk = NULL; - int r, suspended = 0; + int r; log_dbg("Resuming volume %s.", name); @@ -1458,25 +1468,24 @@ int crypt_resume_by_passphrase(struct crypt_device *cd, goto out; } - r = dm_query_device(name, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, &suspended, NULL); + r = dm_status_suspended(cd, name); if (r < 0) return r; - if (!suspended) { + if (!r) { log_err(cd, _("Volume %s is not suspended.\n"), name); return -EINVAL; } if (passphrase) { - r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase, - passphrase_size, &cd->hdr, &vk, cd); + r = LUKS_open_key_with_hdr(keyslot, passphrase, passphrase_size, + &cd->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) @@ -1488,16 +1497,17 @@ out: return r < 0 ? r : keyslot; } -int crypt_resume_by_keyfile(struct crypt_device *cd, - const char *name, - int keyslot, - const char *keyfile, - size_t keyfile_size) +int crypt_resume_by_keyfile_offset(struct crypt_device *cd, + const char *name, + int keyslot, + const char *keyfile, + size_t keyfile_size, + size_t keyfile_offset) { struct volume_key *vk = NULL; char *passphrase_read = NULL; - unsigned int passphrase_size_read; - int r, suspended = 0; + size_t passphrase_size_read; + int r; log_dbg("Resuming volume %s.", name); @@ -1507,12 +1517,11 @@ int crypt_resume_by_keyfile(struct crypt_device *cd, goto out; } - r = dm_query_device(name, NULL, NULL, NULL, NULL, - NULL, NULL, NULL, NULL, &suspended, NULL); + r = dm_status_suspended(cd, name); if (r < 0) return r; - if (!suspended) { + if (!r) { log_err(cd, _("Volume %s is not suspended.\n"), name); return -EINVAL; } @@ -1521,17 +1530,18 @@ int crypt_resume_by_keyfile(struct crypt_device *cd, return -EINVAL; r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read, - &passphrase_size_read, keyfile, keyfile_size); + &passphrase_size_read, keyfile, keyfile_offset, + keyfile_size); if (r < 0) goto out; - r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read, + r = LUKS_open_key_with_hdr(keyslot, passphrase_read, passphrase_size_read, &cd->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: @@ -1540,6 +1550,16 @@ out: return r < 0 ? r : keyslot; } +int crypt_resume_by_keyfile(struct crypt_device *cd, + const char *name, + int keyslot, + const char *keyfile, + size_t keyfile_size) +{ + return crypt_resume_by_keyfile_offset(cd, name, keyslot, + keyfile, keyfile_size, 0); +} + // slot manipulation int crypt_keyslot_add_by_passphrase(struct crypt_device *cd, int keyslot, // -1 any @@ -1550,7 +1570,7 @@ int crypt_keyslot_add_by_passphrase(struct crypt_device *cd, { struct volume_key *vk = NULL; char *password = NULL, *new_password = NULL; - unsigned int passwordLen, new_passwordLen; + size_t passwordLen, new_passwordLen; int r; log_dbg("Adding new keyslot, existing passphrase %sprovided," @@ -1577,7 +1597,7 @@ 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(cd->device, CRYPT_ANY_SLOT, passphrase, + r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, passphrase, passphrase_size, &cd->hdr, &vk, cd); } else { /* Passphrase not provided, ask first and use it to unlock existing keyslot */ @@ -1586,7 +1606,7 @@ int crypt_keyslot_add_by_passphrase(struct crypt_device *cd, if (r < 0) goto out; - r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, + r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password, passwordLen, &cd->hdr, &vk, cd); crypt_safe_free(password); } @@ -1595,7 +1615,7 @@ int crypt_keyslot_add_by_passphrase(struct crypt_device *cd, goto out; if (new_passphrase) { - new_password = (char *)new_passphrase; + new_password = CONST_CAST(char*)new_passphrase; new_passwordLen = new_passphrase_size; } else { r = key_from_terminal(cd, _("Enter new passphrase for key slot: "), @@ -1604,7 +1624,7 @@ int crypt_keyslot_add_by_passphrase(struct crypt_device *cd, goto out; } - r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen, + r = LUKS_set_key(keyslot, new_password, new_passwordLen, &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd); if(r < 0) goto out; @@ -1616,16 +1636,18 @@ out: return r ?: keyslot; } -int crypt_keyslot_add_by_keyfile(struct crypt_device *cd, +int crypt_keyslot_add_by_keyfile_offset(struct crypt_device *cd, int keyslot, const char *keyfile, size_t keyfile_size, + size_t keyfile_offset, const char *new_keyfile, - size_t new_keyfile_size) + size_t new_keyfile_size, + size_t new_keyfile_offset) { struct volume_key *vk = NULL; - char *password = NULL; unsigned int passwordLen; - char *new_password = NULL; unsigned int new_passwordLen; + char *password = NULL; size_t passwordLen; + char *new_password = NULL; size_t new_passwordLen; int r; log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.", @@ -1654,14 +1676,14 @@ int crypt_keyslot_add_by_keyfile(struct crypt_device *cd, if (keyfile) r = key_from_file(cd, _("Enter any passphrase: "), &password, &passwordLen, - keyfile, keyfile_size); + keyfile, keyfile_offset, keyfile_size); else r = key_from_terminal(cd, _("Enter any passphrase: "), &password, &passwordLen, 0); if (r < 0) goto out; - r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen, + r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password, passwordLen, &cd->hdr, &vk, cd); } @@ -1671,14 +1693,14 @@ int crypt_keyslot_add_by_keyfile(struct crypt_device *cd, if (new_keyfile) r = key_from_file(cd, _("Enter new passphrase for key slot: "), &new_password, &new_passwordLen, new_keyfile, - new_keyfile_size); + new_keyfile_offset, new_keyfile_size); else r = key_from_terminal(cd, _("Enter new passphrase for key slot: "), &new_password, &new_passwordLen, 1); if (r < 0) goto out; - r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen, + r = LUKS_set_key(keyslot, new_password, new_passwordLen, &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd); out: crypt_safe_free(password); @@ -1687,6 +1709,18 @@ out: return r < 0 ? r : keyslot; } +int crypt_keyslot_add_by_keyfile(struct crypt_device *cd, + int keyslot, + const char *keyfile, + size_t keyfile_size, + const char *new_keyfile, + size_t new_keyfile_size) +{ + return crypt_keyslot_add_by_keyfile_offset(cd, keyslot, + keyfile, keyfile_size, 0, + new_keyfile, new_keyfile_size, 0); +} + int crypt_keyslot_add_by_volume_key(struct crypt_device *cd, int keyslot, const char *volume_key, @@ -1696,7 +1730,7 @@ int crypt_keyslot_add_by_volume_key(struct crypt_device *cd, { struct volume_key *vk = NULL; int r = -EINVAL; - char *new_password = NULL; unsigned int new_passwordLen; + char *new_password = NULL; size_t new_passwordLen; log_dbg("Adding new keyslot %d using volume key.", keyslot); @@ -1732,7 +1766,7 @@ int crypt_keyslot_add_by_volume_key(struct crypt_device *cd, passphrase_size = new_passwordLen; } - r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size, + r = LUKS_set_key(keyslot, passphrase, passphrase_size, &cd->hdr, vk, cd->iteration_time, &cd->PBKDF2_per_sec, cd); out: crypt_safe_free(new_password); @@ -1762,7 +1796,7 @@ int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot) return -EINVAL; } - return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd); + return LUKS_del_key(keyslot, &cd->hdr, cd); } // activation/deactivation of device mapping @@ -1776,6 +1810,7 @@ int crypt_activate_by_passphrase(struct crypt_device *cd, crypt_status_info ci; struct volume_key *vk = NULL; char *read_passphrase = NULL; + size_t passphraseLen = 0; int r; log_dbg("%s volume %s [keyslot %d] using %spassphrase.", @@ -1794,25 +1829,30 @@ int crypt_activate_by_passphrase(struct crypt_device *cd, /* plain, use hashed passphrase */ if (isPLAIN(cd->type)) { + if (!name) + return -EINVAL; + if (!passphrase) { r = key_from_terminal(cd, NULL, &read_passphrase, - &passphrase_size, 0); + &passphraseLen, 0); if (r < 0) goto out; passphrase = read_passphrase; + passphrase_size = passphraseLen; } - r = create_device_helper(cd, name, cd->plain_hdr.hash, - cd->plain_cipher, cd->plain_cipher_mode, - NULL, passphrase, passphrase_size, - cd->volume_key->keylength, 0, - cd->plain_hdr.skip, cd->plain_hdr.offset, - cd->plain_uuid, - flags & CRYPT_ACTIVATE_READONLY, 0, 0); + + r = process_key(cd, cd->plain_hdr.hash, + cd->plain_key_size, + passphrase, passphrase_size, &vk); + if (r < 0) + goto out; + + r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags); keyslot = 0; } else if (isLUKS(cd->type)) { /* provided passphrase, do not retry */ if (passphrase) { - r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase, + r = LUKS_open_key_with_hdr(keyslot, passphrase, passphrase_size, &cd->hdr, &vk, cd); } else r = volume_key_by_terminal_passphrase(cd, keyslot, &vk); @@ -1820,7 +1860,7 @@ int crypt_activate_by_passphrase(struct crypt_device *cd, if (r >= 0) { keyslot = r; if (name) - r = open_from_hdr_and_vk(cd, vk, name, flags); + r = LUKS1_activate(cd, name, vk, flags); } } else r = -EINVAL; @@ -1831,27 +1871,24 @@ out: return r < 0 ? r : keyslot; } -int crypt_activate_by_keyfile(struct crypt_device *cd, +int crypt_activate_by_keyfile_offset(struct crypt_device *cd, const char *name, int keyslot, const char *keyfile, size_t keyfile_size, + size_t keyfile_offset, uint32_t flags) { crypt_status_info ci; struct volume_key *vk = NULL; char *passphrase_read = NULL; - unsigned int passphrase_size_read; + size_t passphrase_size_read; + unsigned int key_count = 0; int r; log_dbg("Activating volume %s [keyslot %d] using keyfile %s.", name ?: "", keyslot, keyfile ?: "[none]"); - if (!isLUKS(cd->type)) { - log_err(cd, _("This operation is supported only for LUKS device.\n")); - return -EINVAL; - } - if (name) { ci = crypt_status(NULL, name); if (ci == CRYPT_INVALID) @@ -1865,24 +1902,71 @@ int crypt_activate_by_keyfile(struct crypt_device *cd, if (!keyfile) return -EINVAL; - r = key_from_file(cd, _("Enter passphrase: "), &passphrase_read, - &passphrase_size_read, keyfile, keyfile_size); - if (r < 0) - goto out; + if (isPLAIN(cd->type)) { + if (!name) + return -EINVAL; - r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read, - passphrase_size_read, &cd->hdr, &vk, cd); - if (r < 0) - goto out; + r = key_from_file(cd, _("Enter passphrase: "), + &passphrase_read, &passphrase_size_read, + keyfile, keyfile_offset, keyfile_size); + if (r < 0) + goto out; + + r = process_key(cd, cd->plain_hdr.hash, + cd->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); + } 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(keyslot, passphrase_read, + passphrase_size_read, &cd->hdr, &vk, cd); + if (r < 0) + goto out; + keyslot = r; + + if (name) { + r = LUKS1_activate(cd, name, vk, flags); + if (r < 0) + goto out; + } + r = keyslot; + } else if (isLOOPAES(cd->type)) { + r = key_from_file(cd, NULL, &passphrase_read, &passphrase_size_read, + keyfile, keyfile_offset, keyfile_size); + if (r < 0) + goto out; + r = LOOPAES_parse_keyfile(cd, &vk, cd->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, + key_count, vk, flags); + } else + r = -EINVAL; - keyslot = r; - if (name) - r = open_from_hdr_and_vk(cd, vk, name, flags); out: crypt_safe_free(passphrase_read); crypt_free_volume_key(vk); - return r < 0 ? r : keyslot; + return r; +} + +int crypt_activate_by_keyfile(struct crypt_device *cd, + const char *name, + int keyslot, + const char *keyfile, + size_t keyfile_size, + uint32_t flags) +{ + return crypt_activate_by_keyfile_offset(cd, name, keyslot, keyfile, + keyfile_size, 0, flags); } int crypt_activate_by_volume_key(struct crypt_device *cd, @@ -1892,29 +1976,10 @@ int crypt_activate_by_volume_key(struct crypt_device *cd, uint32_t flags) { crypt_status_info ci; - struct volume_key *vk; - int r; - - log_dbg("Activating volume %s by volume key.", name); - - /* use key directly, no hash */ - if (isPLAIN(cd->type)) { - if (!volume_key || !volume_key_size || !cd->volume_key || - volume_key_size != cd->volume_key->keylength) { - log_err(cd, _("Incorrect volume key specified for plain device.\n")); - return -EINVAL; - } - - return create_device_helper(cd, name, NULL, - cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size, - cd->volume_key->keylength, 0, cd->plain_hdr.skip, - cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0); - } + struct volume_key *vk = NULL; + int r = -EINVAL; - if (!isLUKS(cd->type)) { - log_err(cd, _("Device type is not properly initialised.\n")); - return -EINVAL; - } + log_dbg("Activating volume %s by volume key.", name ?: "[none]"); if (name) { ci = crypt_status(NULL, name); @@ -1926,26 +1991,69 @@ int crypt_activate_by_volume_key(struct crypt_device *cd, } } - /* If key is not provided, try to use internal key */ - if (!volume_key) { - if (!cd->volume_key) { - log_err(cd, _("Volume key does not match the volume.\n")); + /* use key directly, no hash */ + if (isPLAIN(cd->type)) { + if (!name) + return -EINVAL; + + if (!volume_key || !volume_key_size || volume_key_size != cd->plain_key_size) { + log_err(cd, _("Incorrect volume key specified for plain device.\n")); return -EINVAL; } - volume_key_size = cd->volume_key->keylength; - volume_key = cd->volume_key->key; - } - vk = crypt_alloc_volume_key(volume_key_size, volume_key); - if (!vk) - return -ENOMEM; - r = LUKS_verify_volume_key(&cd->hdr, vk); + vk = crypt_alloc_volume_key(volume_key_size, volume_key); + if (!vk) + return -ENOMEM; - if (r == -EPERM) - log_err(cd, _("Volume key does not match the volume.\n")); + r = PLAIN_activate(cd, name, vk, cd->plain_hdr.size, flags); + } else if (isLUKS(cd->type)) { + /* If key is not provided, try to use internal key */ + if (!volume_key) { + if (!cd->volume_key) { + log_err(cd, _("Volume key does not match the volume.\n")); + return -EINVAL; + } + volume_key_size = cd->volume_key->keylength; + volume_key = cd->volume_key->key; + } - if (!r && name) - r = open_from_hdr_and_vk(cd, vk, name, flags); + vk = crypt_alloc_volume_key(volume_key_size, volume_key); + if (!vk) + return -ENOMEM; + r = LUKS_verify_volume_key(&cd->hdr, vk); + + if (r == -EPERM) + log_err(cd, _("Volume key does not match the volume.\n")); + + if (!r && name) + r = LUKS1_activate(cd, name, vk, flags); + } else if (isVERITY(cd->type)) { + /* volume_key == root hash */ + if (!volume_key || !volume_key_size) { + log_err(cd, _("Incorrect root hash specified for verity device.\n")); + return -EINVAL; + } + + r = VERITY_activate(cd, name, volume_key, volume_key_size, + &cd->verity_hdr, CRYPT_ACTIVATE_READONLY); + + if (r == -EPERM) { + free(cd->verity_root_hash); + cd->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); + } + } else if (isTCRYPT(cd->type)) { + if (!name) + return -EINVAL; + r = TCRYPT_activate(cd, name, &cd->tcrypt_hdr, + &cd->tcrypt_params, flags); + } else + log_err(cd, _("Device type is not properly initialised.\n")); crypt_free_volume_key(vk); @@ -1961,16 +2069,13 @@ 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: - r = dm_remove_device(name, 0, 0); - break; case CRYPT_BUSY: - log_err(cd, _("Device %s is busy.\n"), name); - r = -EBUSY; + r = dm_remove_device(cd, name, 0, 0); break; case CRYPT_INACTIVE: log_err(cd, _("Device %s is not active.\n"), name); @@ -1982,7 +2087,7 @@ int crypt_deactivate(struct crypt_device *cd, const char *name) } if (!cd) - dm_exit(); + dm_backend_exit(); return r; } @@ -1994,9 +2099,14 @@ int crypt_volume_key_get(struct crypt_device *cd, const char *passphrase, size_t passphrase_size) { - struct volume_key *vk; - char *processed_key = NULL; - int r, key_len; + struct volume_key *vk = NULL; + unsigned key_len; + int r = -EINVAL; + + if (crypt_fips_mode()) { + log_err(cd, "Function not available in FIPS mode.\n"); + return -EACCES; + } key_len = crypt_get_volume_key_size(cd); if (key_len > *volume_key_size) { @@ -2005,33 +2115,24 @@ int crypt_volume_key_get(struct crypt_device *cd, } if (isPLAIN(cd->type) && cd->plain_hdr.hash) { - processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len, - passphrase, passphrase_size); - if (!processed_key) { + r = process_key(cd, cd->plain_hdr.hash, key_len, + passphrase, passphrase_size, &vk); + if (r < 0) log_err(cd, _("Cannot retrieve volume key for plain device.\n")); - return -EINVAL; - } - memcpy(volume_key, processed_key, key_len); - *volume_key_size = key_len; - crypt_safe_free(processed_key); - return 0; - } - - if (isLUKS(cd->type)) { - r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase, + } else if (isLUKS(cd->type)) { + r = LUKS_open_key_with_hdr(keyslot, passphrase, passphrase_size, &cd->hdr, &vk, cd); - if (r >= 0) { - memcpy(volume_key, vk->key, vk->keylength); - *volume_key_size = vk->keylength; - } + } else + log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)"); - crypt_free_volume_key(vk); - return r; + if (r >= 0) { + memcpy(volume_key, vk->key, vk->keylength); + *volume_key_size = vk->keylength; } - log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)"); - return -EINVAL; + crypt_free_volume_key(vk); + return r; } int crypt_volume_key_verify(struct crypt_device *cd, @@ -2072,11 +2173,15 @@ void crypt_set_password_retry(struct crypt_device *cd, int tries) cd->tries = tries; } -void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms) +void crypt_set_iteration_time(struct crypt_device *cd, uint64_t iteration_time_ms) { log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms); cd->iteration_time = iteration_time_ms; } +void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms) +{ + crypt_set_iteration_time(cd, iteration_time_ms); +} void crypt_set_password_verify(struct crypt_device *cd, int password_verify) { @@ -2112,13 +2217,13 @@ 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; @@ -2132,22 +2237,18 @@ crypt_status_info crypt_status(struct crypt_device *cd, const char *name) return CRYPT_INACTIVE; } -static void hexprintICB(struct crypt_device *cd, char *d, int n) +static void hexprint(struct crypt_device *cd, const char *d, int n, const char *sep) { int i; for(i = 0; i < n; i++) - log_std(cd, "%02hhx ", (char)d[i]); + log_std(cd, "%02hhx%s", (const char)d[i], sep); } -int crypt_dump(struct crypt_device *cd) +static int _luks_dump(struct crypt_device *cd) { int i; - if (!isLUKS(cd->type)) { //FIXME - log_err(cd, _("This operation is supported only for LUKS device.\n")); - return -EINVAL; - } - log_std(cd, "LUKS header information for %s\n\n", cd->device); + log_std(cd, "LUKS header information for %s\n\n", mdata_device_path(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); @@ -2155,12 +2256,12 @@ int crypt_dump(struct crypt_device *cd) 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, "MK digest: \t"); - hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE); + hexprint(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE, " "); log_std(cd, "\n"); log_std(cd, "MK salt: \t"); - hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2); + hexprint(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2, " "); log_std(cd, "\n \t"); - hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2); + hexprint(cd, cd->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); @@ -2170,11 +2271,11 @@ int crypt_dump(struct crypt_device *cd) log_std(cd, "\tIterations: \t%d\n", cd->hdr.keyblock[i].passwordIterations); log_std(cd, "\tSalt: \t"); - hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt, - LUKS_SALTSIZE/2); + hexprint(cd, cd->hdr.keyblock[i].passwordSalt, + LUKS_SALTSIZE/2, " "); log_std(cd, "\n\t \t"); - hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt + - LUKS_SALTSIZE/2, LUKS_SALTSIZE/2); + hexprint(cd, cd->hdr.keyblock[i].passwordSalt + + LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " "); log_std(cd, "\n"); log_std(cd, "\tKey material offset:\t%d\n", @@ -2185,10 +2286,43 @@ int crypt_dump(struct crypt_device *cd) else log_std(cd, "Key Slot %d: DISABLED\n", i); } + return 0; +} +static int _verity_dump(struct crypt_device *cd) +{ + log_std(cd, "VERITY header information for %s\n", mdata_device_path(cd)); + log_std(cd, "UUID: \t%s\n", cd->verity_uuid ?: ""); + 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, "Salt: \t"); + if (cd->verity_hdr.salt_size) + hexprint(cd, cd->verity_hdr.salt, cd->verity_hdr.salt_size, ""); + else + log_std(cd, "-"); + log_std(cd, "\n"); + if (cd->verity_root_hash) { + log_std(cd, "Root hash: \t"); + hexprint(cd, cd->verity_root_hash, cd->verity_root_hash_size, ""); + log_std(cd, "\n"); + } return 0; } +int crypt_dump(struct crypt_device *cd) +{ + if (isLUKS(cd->type)) + return _luks_dump(cd); + else if (isVERITY(cd->type)) + return _verity_dump(cd); + + log_err(cd, _("Dump operation is not supported for this device type.\n")); + return -EINVAL; +} + const char *crypt_get_cipher(struct crypt_device *cd) { if (isPLAIN(cd->type)) @@ -2197,6 +2331,9 @@ const char *crypt_get_cipher(struct crypt_device *cd) if (isLUKS(cd->type)) return cd->hdr.cipherName; + if (isLOOPAES(cd->type)) + return cd->loopaes_cipher; + return NULL; } @@ -2208,6 +2345,9 @@ const char *crypt_get_cipher_mode(struct crypt_device *cd) if (isLUKS(cd->type)) return cd->hdr.cipherMode; + if (isLOOPAES(cd->type)) + return cd->loopaes_cipher_mode; + return NULL; } @@ -2219,22 +2359,39 @@ const char *crypt_get_uuid(struct crypt_device *cd) if (isPLAIN(cd->type)) return cd->plain_uuid; + if (isLOOPAES(cd->type)) + return cd->loopaes_uuid; + + if (isVERITY(cd->type)) + return cd->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) && cd->volume_key) - return cd->volume_key->keylength; + if (isPLAIN(cd->type)) + return cd->plain_key_size; if (isLUKS(cd->type)) return cd->hdr.keyBytes; + if (isLOOPAES(cd->type)) + return cd->loopaes_key_size; + + if (isVERITY(cd->type)) + return cd->verity_root_hash_size; + return 0; } @@ -2246,6 +2403,35 @@ uint64_t crypt_get_data_offset(struct crypt_device *cd) if (isLUKS(cd->type)) return cd->hdr.payloadOffset; + if (isLOOPAES(cd->type)) + return cd->loopaes_hdr.offset; + + if (isTCRYPT(cd->type)) { // FIXME: system vol. + if (!cd->tcrypt_hdr.d.mk_offset) + return 1; + return (cd->tcrypt_hdr.d.mk_offset / cd->tcrypt_hdr.d.sector_size); + } + + return 0; +} + +uint64_t crypt_get_iv_offset(struct crypt_device *cd) +{ + if (isPLAIN(cd->type)) + return cd->plain_hdr.skip; + + if (isLUKS(cd->type)) + return 0; + + if (isLOOPAES(cd->type)) + return cd->loopaes_hdr.skip; + + if (isTCRYPT(cd->type)) { + if (!cd->tcrypt_hdr.d.mk_offset) + return 0; + return (cd->tcrypt_hdr.d.mk_offset / cd->tcrypt_hdr.d.sector_size); + } + return 0; } @@ -2267,23 +2453,60 @@ 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->hdr, keyslot, offset, length); +} + const char *crypt_get_type(struct crypt_device *cd) { return cd->type; } -int crypt_get_active_device(struct crypt_device *cd, +int crypt_get_verity_info(struct crypt_device *cd, + struct crypt_params_verity *vp) +{ + if (!isVERITY(cd->type) || !vp) + return -EINVAL; + + vp->data_device = device_path(cd->device); + vp->hash_device = mdata_device_path(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; + return 0; +} + +int crypt_get_active_device(struct crypt_device *cd __attribute__((unused)), const char *name, struct crypt_active_device *cad) { - int r, readonly; + struct crypt_dm_active_device dmd; + int r; - r = dm_query_device(name, NULL, &cad->size, &cad->iv_offset, &cad->offset, - NULL, NULL, NULL, &readonly, NULL, NULL); + r = dm_query_device(cd, name, 0, &dmd); if (r < 0) return r; - cad->flags = readonly ? CRYPT_ACTIVATE_READONLY : 0; + 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; + cad->size = dmd.size; + cad->flags = dmd.flags; return 0; }