| /* |
| * libcryptsetup - cryptsetup library |
| * |
| * Copyright (C) 2004, Jana Saout <jana@saout.de> |
| * Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org> |
| * Copyright (C) 2009-2018, Red Hat, Inc. All rights reserved. |
| * Copyright (C) 2009-2018, Milan Broz |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * 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 <string.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <sys/utsname.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| |
| #include "libcryptsetup.h" |
| #include "luks.h" |
| #include "luks2.h" |
| #include "loopaes.h" |
| #include "verity.h" |
| #include "tcrypt.h" |
| #include "integrity.h" |
| #include "internal.h" |
| |
| #define CRYPT_CD_UNRESTRICTED (1 << 0) |
| #define CRYPT_CD_QUIET (1 << 1) |
| |
| struct crypt_device { |
| char *type; |
| |
| struct device *device; |
| struct device *metadata_device; |
| |
| struct volume_key *volume_key; |
| int rng_type; |
| struct crypt_pbkdf_type pbkdf; |
| |
| /* global context scope settings */ |
| unsigned key_in_keyring:1; |
| |
| // FIXME: private binary headers and access it properly |
| // through sub-library (LUKS1, TCRYPT) |
| |
| union { |
| struct { /* used in CRYPT_LUKS1 */ |
| struct luks_phdr hdr; |
| } luks1; |
| struct { /* used in CRYPT_LUKS2 */ |
| struct luks2_hdr hdr; |
| char *cipher; /* only for compatibility, segment 0 */ |
| char *cipher_mode; /* only for compatibility, segment 0 */ |
| } luks2; |
| struct { /* used in CRYPT_PLAIN */ |
| struct crypt_params_plain hdr; |
| char *cipher; |
| char *cipher_mode; |
| unsigned int key_size; |
| } plain; |
| struct { /* used in CRYPT_LOOPAES */ |
| struct crypt_params_loopaes hdr; |
| char *cipher; |
| char *cipher_mode; |
| 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; |
| struct device *fec_device; |
| } verity; |
| struct { /* used in CRYPT_TCRYPT */ |
| struct crypt_params_tcrypt params; |
| struct tcrypt_phdr hdr; |
| } tcrypt; |
| struct { /* used in CRYPT_INTEGRITY */ |
| struct crypt_params_integrity params; |
| struct volume_key *journal_mac_key; |
| struct volume_key *journal_crypt_key; |
| } integrity; |
| struct { /* used if initialized without header by name */ |
| char *active_name; |
| /* buffers, must refresh from kernel on every query */ |
| char cipher[MAX_CIPHER_LEN]; |
| char cipher_mode[MAX_CIPHER_LEN]; |
| unsigned int key_size; |
| unsigned int veracrypt_pim; |
| } none; |
| } u; |
| |
| /* callbacks definitions */ |
| void (*log)(int level, const char *msg, void *usrptr); |
| void *log_usrptr; |
| int (*confirm)(const char *msg, void *usrptr); |
| void *confirm_usrptr; |
| }; |
| |
| /* Just to suppress redundant messages about crypto backend */ |
| static int _crypto_logged = 0; |
| |
| /* Log helper */ |
| static void (*_default_log)(int level, const char *msg, void *usrptr) = NULL; |
| static int _debug_level = 0; |
| |
| /* Library can do metadata locking */ |
| static int _metadata_locking = 1; |
| |
| /* Library scope detection for kernel keyring support */ |
| static int _kernel_keyring_supported; |
| |
| /* Library allowed to use kernel keyring for loading VK in kernel crypto layer */ |
| static int _vk_via_keyring = 1; |
| |
| void crypt_set_debug_level(int level) |
| { |
| _debug_level = level; |
| } |
| |
| int crypt_get_debug_level(void) |
| { |
| return _debug_level; |
| } |
| |
| void crypt_log(struct crypt_device *cd, int level, const char *msg) |
| { |
| if (!msg) |
| return; |
| |
| if (level < _debug_level) |
| return; |
| |
| if (cd && cd->log) |
| cd->log(level, msg, cd->log_usrptr); |
| else if (_default_log) |
| _default_log(level, msg, NULL); |
| /* Default to stdout/stderr if there is no callback. */ |
| else |
| fprintf(level == CRYPT_LOG_ERROR ? stderr : stdout, "%s", msg); |
| } |
| |
| __attribute__((format(printf, 5, 6))) |
| void logger(struct crypt_device *cd, int level, const char *file, |
| int line, const char *format, ...) |
| { |
| va_list argp; |
| char target[LOG_MAX_LEN + 2]; |
| |
| va_start(argp, format); |
| |
| if (vsnprintf(&target[0], LOG_MAX_LEN, format, argp) > 0 ) { |
| /* All verbose and error messages in tools end with EOL. */ |
| if (level == CRYPT_LOG_VERBOSE || level == CRYPT_LOG_ERROR) |
| strncat(target, "\n", LOG_MAX_LEN); |
| |
| crypt_log(cd, level, target); |
| } |
| |
| va_end(argp); |
| } |
| |
| static const char *mdata_device_path(struct crypt_device *cd) |
| { |
| return device_path(cd->metadata_device ?: cd->device); |
| } |
| |
| static const char *data_device_path(struct crypt_device *cd) |
| { |
| return device_path(cd->device); |
| } |
| |
| /* 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) |
| { |
| struct utsname uts; |
| int r; |
| |
| r = crypt_random_init(ctx); |
| if (r < 0) { |
| log_err(ctx, _("Cannot initialize crypto RNG backend.")); |
| return r; |
| } |
| |
| r = crypt_backend_init(ctx); |
| if (r < 0) |
| log_err(ctx, _("Cannot initialize crypto backend.")); |
| |
| if (!r && !_crypto_logged) { |
| log_dbg("Crypto backend (%s) initialized in cryptsetup library version %s.", |
| crypt_backend_version(), PACKAGE_VERSION); |
| if (!uname(&uts)) |
| log_dbg("Detected kernel %s %s %s.", |
| uts.sysname, uts.release, uts.machine); |
| _crypto_logged = 1; |
| } |
| |
| 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) { |
| 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."), |
| hash_name); |
| else |
| log_err(cd, _("Key processing error (using hash %s)."), |
| hash_name); |
| crypt_free_volume_key(*vk); |
| *vk = NULL; |
| return -EINVAL; |
| } |
| } else if (passLen > key_size) { |
| memcpy((*vk)->key, pass, key_size); |
| } else { |
| memcpy((*vk)->key, pass, passLen); |
| } |
| |
| return 0; |
| } |
| |
| static int isPLAIN(const char *type) |
| { |
| return (type && !strcmp(CRYPT_PLAIN, type)); |
| } |
| |
| static int isLUKS1(const char *type) |
| { |
| return (type && !strcmp(CRYPT_LUKS1, type)); |
| } |
| |
| static int isLUKS2(const char *type) |
| { |
| return (type && !strcmp(CRYPT_LUKS2, type)); |
| } |
| |
| static int isLUKS(const char *type) |
| { |
| return (isLUKS2(type) || isLUKS1(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)); |
| } |
| |
| static int isINTEGRITY(const char *type) |
| { |
| return (type && !strcmp(CRYPT_INTEGRITY, type)); |
| } |
| |
| static int _onlyLUKS(struct crypt_device *cd, uint32_t cdflags) |
| { |
| int r = 0; |
| |
| if (cd && !cd->type) { |
| if (!(cdflags & CRYPT_CD_QUIET)) |
| log_err(cd, _("Cannot determine device type. Incompatible activation of device?")); |
| r = -EINVAL; |
| } |
| |
| if (!cd || !isLUKS(cd->type)) { |
| if (!(cdflags & CRYPT_CD_QUIET)) |
| log_err(cd, _("This operation is supported only for LUKS device.")); |
| r = -EINVAL; |
| } |
| |
| if (r || (cdflags & CRYPT_CD_UNRESTRICTED) || isLUKS1(cd->type)) |
| return r; |
| |
| return LUKS2_unmet_requirements(cd, &cd->u.luks2.hdr, 0, cdflags & CRYPT_CD_QUIET); |
| } |
| |
| static int onlyLUKS(struct crypt_device *cd) |
| { |
| return _onlyLUKS(cd, 0); |
| } |
| |
| static int _onlyLUKS2(struct crypt_device *cd, uint32_t cdflags) |
| { |
| int r = 0; |
| |
| if (cd && !cd->type) { |
| if (!(cdflags & CRYPT_CD_QUIET)) |
| log_err(cd, _("Cannot determine device type. Incompatible activation of device?")); |
| r = -EINVAL; |
| } |
| |
| if (!cd || !isLUKS2(cd->type)) { |
| if (!(cdflags & CRYPT_CD_QUIET)) |
| log_err(cd, _("This operation is supported only for LUKS2 device.")); |
| r = -EINVAL; |
| } |
| |
| if (r || (cdflags & CRYPT_CD_UNRESTRICTED)) |
| return r; |
| |
| return LUKS2_unmet_requirements(cd, &cd->u.luks2.hdr, 0, cdflags & CRYPT_CD_QUIET); |
| } |
| |
| static int onlyLUKS2(struct crypt_device *cd) |
| { |
| return _onlyLUKS2(cd, 0); |
| } |
| |
| static void crypt_set_null_type(struct crypt_device *cd) |
| { |
| if (!cd->type) |
| return; |
| |
| free(cd->type); |
| cd->type = NULL; |
| cd->u.none.active_name = NULL; |
| } |
| |
| static void crypt_reset_null_type(struct crypt_device *cd) |
| { |
| if (cd->type) |
| return; |
| |
| free(cd->u.none.active_name); |
| cd->u.none.active_name = NULL; |
| } |
| |
| /* keyslot helpers */ |
| static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot) |
| { |
| crypt_keyslot_info ki; |
| |
| if (*keyslot == CRYPT_ANY_SLOT) { |
| if (isLUKS1(cd->type)) |
| *keyslot = LUKS_keyslot_find_empty(&cd->u.luks1.hdr); |
| else |
| *keyslot = LUKS2_keyslot_find_empty(&cd->u.luks2.hdr, "luks2"); |
| if (*keyslot < 0) { |
| log_err(cd, _("All key slots full.")); |
| return -EINVAL; |
| } |
| } |
| |
| if (isLUKS1(cd->type)) |
| ki = LUKS_keyslot_info(&cd->u.luks1.hdr, *keyslot); |
| else |
| ki = LUKS2_keyslot_info(&cd->u.luks2.hdr, *keyslot); |
| switch (ki) { |
| case CRYPT_SLOT_INVALID: |
| log_err(cd, _("Key slot %d is invalid, please select between 0 and %d."), |
| *keyslot, LUKS_NUMKEYS - 1); |
| return -EINVAL; |
| case CRYPT_SLOT_INACTIVE: |
| break; |
| default: |
| log_err(cd, _("Key slot %d is full, please select another one."), |
| *keyslot); |
| return -EINVAL; |
| } |
| |
| log_dbg("Selected keyslot %d.", *keyslot); |
| return 0; |
| } |
| |
| /* |
| * 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) |
| { |
| int i, j; |
| char *str; |
| |
| if (!dm_uuid || !hdr_uuid) |
| return -EINVAL; |
| |
| str = strchr(dm_uuid, '-'); |
| if (!str) |
| return -EINVAL; |
| |
| for (i = 0, j = 1; hdr_uuid[i]; i++) { |
| if (hdr_uuid[i] == '-') |
| continue; |
| |
| if (!str[j] || str[j] == '-') |
| return -EINVAL; |
| |
| if (str[j] != hdr_uuid[i]) |
| return -EINVAL; |
| j++; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * compares type of active device to provided string (only if there is no explicit type) |
| */ |
| static int crypt_uuid_type_cmp(struct crypt_device *cd, const char *type) |
| { |
| struct crypt_dm_active_device dmd = {}; |
| size_t len; |
| int r; |
| |
| /* Must user header-on-disk if we know type here */ |
| if (cd->type || !cd->u.none.active_name) |
| return -EINVAL; |
| |
| log_dbg("Checking if active device %s without header has UUID type %s.", |
| cd->u.none.active_name, type); |
| |
| r = dm_query_device(cd, cd->u.none.active_name, DM_ACTIVE_UUID, &dmd); |
| if (r < 0) |
| return r; |
| |
| r = -ENODEV; |
| len = strlen(type); |
| if (dmd.uuid && strlen(dmd.uuid) > len && |
| !strncmp(dmd.uuid, type, len) && dmd.uuid[len] == '-') |
| r = 0; |
| |
| free(CONST_CAST(void*)dmd.uuid); |
| return r; |
| } |
| |
| int PLAIN_activate(struct crypt_device *cd, |
| const char *name, |
| struct volume_key *vk, |
| uint64_t size, |
| uint32_t flags) |
| { |
| int r; |
| char *dm_cipher = NULL; |
| enum devcheck device_check; |
| struct crypt_dm_active_device dmd = { |
| .target = DM_CRYPT, |
| .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), |
| .sector_size = crypt_get_sector_size(cd), |
| } |
| }; |
| |
| if (dmd.flags & CRYPT_ACTIVATE_SHARED) |
| device_check = DEV_SHARED; |
| else |
| device_check = DEV_EXCL; |
| |
| r = device_block_adjust(cd, dmd.data_device, device_check, |
| dmd.u.crypt.offset, &dmd.size, &dmd.flags); |
| if (r) |
| return r; |
| |
| 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; |
| |
| dmd.u.crypt.cipher = dm_cipher; |
| log_dbg("Trying to activate PLAIN device %s using cipher %s.", |
| name, dmd.u.crypt.cipher); |
| |
| r = dm_create_device(cd, name, CRYPT_PLAIN, &dmd, 0); |
| |
| free(dm_cipher); |
| return r; |
| } |
| |
| int crypt_confirm(struct crypt_device *cd, const char *msg) |
| { |
| if (!cd || !cd->confirm) |
| return 1; |
| else |
| return cd->confirm(msg, cd->confirm_usrptr); |
| } |
| |
| void crypt_set_log_callback(struct crypt_device *cd, |
| void (*log)(int level, const char *msg, void *usrptr), |
| void *usrptr) |
| { |
| if (!cd) |
| _default_log = log; |
| else { |
| cd->log = log; |
| cd->log_usrptr = usrptr; |
| } |
| } |
| |
| void crypt_set_confirm_callback(struct crypt_device *cd, |
| int (*confirm)(const char *msg, void *usrptr), |
| void *usrptr) |
| { |
| if (cd) { |
| cd->confirm = confirm; |
| cd->confirm_usrptr = usrptr; |
| } |
| } |
| |
| const char *crypt_get_dir(void) |
| { |
| return dm_get_dir(); |
| } |
| |
| int crypt_init(struct crypt_device **cd, const char *device) |
| { |
| struct crypt_device *h = NULL; |
| int r; |
| |
| if (!cd) |
| return -EINVAL; |
| |
| log_dbg("Allocating context for crypt device %s.", device ?: "(none)"); |
| |
| if (!(h = malloc(sizeof(struct crypt_device)))) |
| return -ENOMEM; |
| |
| memset(h, 0, sizeof(*h)); |
| |
| r = device_alloc(&h->device, device); |
| if (r < 0) |
| goto bad; |
| |
| dm_backend_init(); |
| |
| h->rng_type = crypt_random_default_key_rng(); |
| |
| *cd = h; |
| return 0; |
| bad: |
| device_free(h->device); |
| free(h); |
| return r; |
| } |
| |
| static int crypt_check_data_device_size(struct crypt_device *cd) |
| { |
| int r; |
| uint64_t size, size_min; |
| |
| /* Check data device size, require at least header or one sector */ |
| size_min = crypt_get_data_offset(cd) << SECTOR_SHIFT ?: SECTOR_SIZE; |
| |
| r = device_size(cd->device, &size); |
| if (r < 0) |
| return r; |
| |
| if (size < size_min) { |
| log_err(cd, _("Header detected but device %s is too small."), |
| device_path(cd->device)); |
| return -EINVAL; |
| } |
| |
| return r; |
| } |
| |
| int crypt_set_data_device(struct crypt_device *cd, const char *device) |
| { |
| struct device *dev = NULL; |
| int r; |
| |
| if (!cd) |
| return -EINVAL; |
| |
| log_dbg("Setting ciphertext data device to %s.", device ?: "(none)"); |
| |
| if (!isLUKS1(cd->type) && !isLUKS2(cd->type) && !isVERITY(cd->type)) { |
| log_err(cd, _("This operation is not supported for this device type.")); |
| return -EINVAL; |
| } |
| |
| /* metadata device must be set */ |
| if (!cd->device || !device) |
| return -EINVAL; |
| |
| r = device_alloc(&dev, device); |
| if (r < 0) |
| return r; |
| |
| if (!cd->metadata_device) { |
| cd->metadata_device = cd->device; |
| } else |
| device_free(cd->device); |
| |
| cd->device = dev; |
| |
| return crypt_check_data_device_size(cd); |
| } |
| |
| /* internal only */ |
| struct crypt_pbkdf_type *crypt_get_pbkdf(struct crypt_device *cd) |
| { |
| return &cd->pbkdf; |
| } |
| |
| /* |
| * crypt_load() helpers |
| */ |
| static int _crypt_load_luks2(struct crypt_device *cd, int reload, int repair) |
| { |
| int r; |
| char tmp_cipher[MAX_CIPHER_LEN], tmp_cipher_mode[MAX_CIPHER_LEN], |
| *cipher = NULL, *cipher_mode = NULL, *type = NULL; |
| struct luks2_hdr hdr2 = {}; |
| |
| log_dbg("%soading LUKS2 header (repair %sabled).", reload ? "Rel" : "L", repair ? "en" : "dis"); |
| |
| r = LUKS2_hdr_read(cd, &hdr2, repair); |
| if (r) |
| return r; |
| |
| if (!reload && !(type = strdup(CRYPT_LUKS2))) { |
| r = -ENOMEM; |
| goto out; |
| } |
| |
| r = crypt_parse_name_and_mode(LUKS2_get_cipher(&hdr2, CRYPT_DEFAULT_SEGMENT), |
| tmp_cipher, NULL, tmp_cipher_mode); |
| if (r < 0) { |
| log_dbg("Cannot parse cipher and mode from loaded device."); |
| goto out; |
| } |
| |
| cipher = strdup(tmp_cipher); |
| cipher_mode = strdup(tmp_cipher_mode); |
| if (!cipher || !cipher_mode) { |
| r = -ENOMEM; |
| goto out; |
| } |
| |
| if (verify_pbkdf_params(cd, &cd->pbkdf)) { |
| r = init_pbkdf_type(cd, NULL, CRYPT_LUKS2); |
| if (r) |
| goto out; |
| } |
| |
| if (reload) { |
| LUKS2_hdr_free(&cd->u.luks2.hdr); |
| free(cd->u.luks2.cipher); |
| free(cd->u.luks2.cipher_mode); |
| } else |
| cd->type = type; |
| |
| r = 0; |
| memcpy(&cd->u.luks2.hdr, &hdr2, sizeof(hdr2)); |
| |
| /* Save cipher and mode, compatibility only. */ |
| cd->u.luks2.cipher = cipher; |
| cd->u.luks2.cipher_mode = cipher_mode; |
| out: |
| if (r) { |
| free(cipher); |
| free(cipher_mode); |
| free(type); |
| LUKS2_hdr_free(&hdr2); |
| } |
| /* FIXME: why? */ |
| crypt_memzero(&hdr2, sizeof(hdr2)); |
| |
| return r; |
| } |
| |
| static void _luks2_reload(struct crypt_device *cd) |
| { |
| if (!cd || !isLUKS2(cd->type)) |
| return; |
| |
| (void) _crypt_load_luks2(cd, 1, 0); |
| } |
| |
| static int _crypt_load_luks(struct crypt_device *cd, const char *requested_type, |
| int require_header, int repair) |
| { |
| struct luks_phdr hdr = {}; |
| int r, version = 0; |
| |
| r = init_crypto(cd); |
| if (r < 0) |
| return r; |
| |
| /* This will return 0 if primary LUKS2 header is damaged */ |
| if (!requested_type) |
| version = LUKS2_hdr_version_unlocked(cd, NULL); |
| |
| if (isLUKS1(requested_type) || version == 1) { |
| if (cd->type && isLUKS2(cd->type)) { |
| log_dbg("Context is already initialised to type %s", cd->type); |
| return -EINVAL; |
| } |
| |
| if (verify_pbkdf_params(cd, &cd->pbkdf)) { |
| r = init_pbkdf_type(cd, NULL, CRYPT_LUKS1); |
| if (r) |
| return r; |
| } |
| |
| r = LUKS_read_phdr(&hdr, require_header, repair, cd); |
| if (r) |
| goto out; |
| |
| if (!cd->type && !(cd->type = strdup(CRYPT_LUKS1))) { |
| r = -ENOMEM; |
| goto out; |
| } |
| |
| /* Set hash to the same as in the loaded header */ |
| if (!cd->pbkdf.hash || strcmp(cd->pbkdf.hash, hdr.hashSpec)) { |
| free(CONST_CAST(void*)cd->pbkdf.hash); |
| cd->pbkdf.hash = strdup(hdr.hashSpec); |
| if (!cd->pbkdf.hash) { |
| r = -ENOMEM; |
| goto out; |
| } |
| } |
| |
| memcpy(&cd->u.luks1.hdr, &hdr, sizeof(hdr)); |
| } else if (isLUKS2(requested_type) || version == 2 || version == 0) { |
| if (cd->type && isLUKS1(cd->type)) { |
| log_dbg("Context is already initialised to type %s", cd->type); |
| return -EINVAL; |
| } |
| |
| /* |
| * Current LUKS2 repair just overrides blkid probes |
| * and perform auto-recovery if possible. This is safe |
| * unless future LUKS2 repair code do something more |
| * sophisticated. In such case we would need to check |
| * for LUKS2 requirements and decide if it's safe to |
| * perform repair. |
| */ |
| r = _crypt_load_luks2(cd, cd->type != NULL, repair); |
| } else { |
| if (version > 2) |
| log_err(cd, _("Unsupported LUKS version %d."), version); |
| r = -EINVAL; |
| } |
| out: |
| crypt_memzero(&hdr, sizeof(hdr)); |
| |
| return r; |
| } |
| |
| static int _crypt_load_tcrypt(struct crypt_device *cd, struct crypt_params_tcrypt *params) |
| { |
| int r; |
| |
| if (!params) |
| return -EINVAL; |
| |
| 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; |
| cd->u.tcrypt.params.veracrypt_pim = 0; |
| |
| if (r < 0) |
| return r; |
| |
| if (!cd->type && !(cd->type = strdup(CRYPT_TCRYPT))) |
| return -ENOMEM; |
| |
| return r; |
| } |
| |
| static int _crypt_load_verity(struct crypt_device *cd, struct crypt_params_verity *params) |
| { |
| int r; |
| size_t sb_offset = 0; |
| |
| r = init_crypto(cd); |
| if (r < 0) |
| return r; |
| |
| if (params && params->flags & CRYPT_VERITY_NO_HEADER) |
| return -EINVAL; |
| |
| if (params) |
| sb_offset = params->hash_area_offset; |
| |
| r = VERITY_read_sb(cd, sb_offset, &cd->u.verity.uuid, &cd->u.verity.hdr); |
| if (r < 0) |
| return r; |
| |
| //FIXME: use crypt_free |
| if (!cd->type && !(cd->type = strdup(CRYPT_VERITY))) { |
| free(CONST_CAST(void*)cd->u.verity.hdr.hash_name); |
| free(CONST_CAST(void*)cd->u.verity.hdr.salt); |
| free(cd->u.verity.uuid); |
| crypt_memzero(&cd->u.verity.hdr, sizeof(cd->u.verity.hdr)); |
| return -ENOMEM; |
| } |
| |
| if (params) |
| cd->u.verity.hdr.flags = params->flags; |
| |
| /* 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 (params && params->data_device && |
| (r = crypt_set_data_device(cd, params->data_device)) < 0) |
| return r; |
| |
| if (params && params->fec_device) { |
| r = device_alloc(&cd->u.verity.fec_device, params->fec_device); |
| if (r < 0) |
| return r; |
| cd->u.verity.hdr.fec_area_offset = params->fec_area_offset; |
| cd->u.verity.hdr.fec_roots = params->fec_roots; |
| } |
| |
| return r; |
| } |
| |
| static int _crypt_load_integrity(struct crypt_device *cd, |
| struct crypt_params_integrity *params) |
| { |
| int r; |
| |
| r = init_crypto(cd); |
| if (r < 0) |
| return r; |
| |
| r = INTEGRITY_read_sb(cd, &cd->u.integrity.params); |
| if (r < 0) |
| return r; |
| |
| // FIXME: add checks for fields in integrity sb vs params |
| |
| if (params) { |
| cd->u.integrity.params.journal_watermark = params->journal_watermark; |
| cd->u.integrity.params.journal_commit_time = params->journal_commit_time; |
| cd->u.integrity.params.buffer_sectors = params->buffer_sectors; |
| // FIXME: check ENOMEM |
| if (params->integrity) |
| cd->u.integrity.params.integrity = strdup(params->integrity); |
| cd->u.integrity.params.integrity_key_size = params->integrity_key_size; |
| if (params->journal_integrity) |
| cd->u.integrity.params.journal_integrity = strdup(params->journal_integrity); |
| if (params->journal_crypt) |
| cd->u.integrity.params.journal_crypt = strdup(params->journal_crypt); |
| |
| if (params->journal_crypt_key) { |
| cd->u.integrity.journal_crypt_key = |
| crypt_alloc_volume_key(params->journal_crypt_key_size, |
| params->journal_crypt_key); |
| if (!cd->u.integrity.journal_crypt_key) |
| return -ENOMEM; |
| } |
| if (params->journal_integrity_key) { |
| cd->u.integrity.journal_mac_key = |
| crypt_alloc_volume_key(params->journal_integrity_key_size, |
| params->journal_integrity_key); |
| if (!cd->u.integrity.journal_mac_key) |
| return -ENOMEM; |
| } |
| } |
| |
| if (!cd->type && !(cd->type = strdup(CRYPT_INTEGRITY))) { |
| free(CONST_CAST(void*)cd->u.integrity.params.integrity); |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| int crypt_load(struct crypt_device *cd, |
| const char *requested_type, |
| void *params) |
| { |
| int r; |
| |
| if (!cd) |
| return -EINVAL; |
| |
| 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; |
| |
| crypt_reset_null_type(cd); |
| |
| if (!requested_type || isLUKS1(requested_type) || isLUKS2(requested_type)) { |
| if (cd->type && !isLUKS1(cd->type) && !isLUKS2(cd->type)) { |
| log_dbg("Context is already initialised to type %s", cd->type); |
| return -EINVAL; |
| } |
| |
| r = _crypt_load_luks(cd, requested_type, 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 if (isINTEGRITY(requested_type)) { |
| if (cd->type && !isINTEGRITY(cd->type)) { |
| log_dbg("Context is already initialised to type %s", cd->type); |
| return -EINVAL; |
| } |
| r = _crypt_load_integrity(cd, params); |
| } else |
| return -EINVAL; |
| |
| return r; |
| } |
| |
| /* |
| * crypt_init() helpers |
| */ |
| static int _init_by_name_crypt_none(struct crypt_device *cd) |
| { |
| struct crypt_dm_active_device dmd = {}; |
| int r; |
| |
| if (cd->type || !cd->u.none.active_name) |
| return -EINVAL; |
| |
| r = dm_query_device(cd, cd->u.none.active_name, |
| DM_ACTIVE_CRYPT_CIPHER | |
| DM_ACTIVE_CRYPT_KEYSIZE, &dmd); |
| if (r >= 0) |
| r = crypt_parse_name_and_mode(dmd.u.crypt.cipher, |
| cd->u.none.cipher, NULL, |
| cd->u.none.cipher_mode); |
| |
| if (!r) |
| cd->u.none.key_size = dmd.u.crypt.vk->keylength; |
| |
| crypt_free_volume_key(dmd.u.crypt.vk); |
| free(CONST_CAST(void*)dmd.u.crypt.cipher); |
| free(CONST_CAST(void*)dmd.u.crypt.integrity); |
| return r; |
| } |
| |
| static const char *LUKS_UUID(struct crypt_device *cd) |
| { |
| if (!cd) |
| return NULL; |
| else if (isLUKS1(cd->type)) |
| return cd->u.luks1.hdr.uuid; |
| else if (isLUKS2(cd->type)) |
| return cd->u.luks2.hdr.uuid; |
| |
| return NULL; |
| } |
| |
| static void crypt_free_type(struct crypt_device *cd) |
| { |
| if (isPLAIN(cd->type)) { |
| free(CONST_CAST(void*)cd->u.plain.hdr.hash); |
| free(cd->u.plain.cipher); |
| free(cd->u.plain.cipher_mode); |
| } else if (isLUKS2(cd->type)) { |
| LUKS2_hdr_free(&cd->u.luks2.hdr); |
| free(cd->u.luks2.cipher); |
| free(cd->u.luks2.cipher_mode); |
| } else if (isLOOPAES(cd->type)) { |
| free(CONST_CAST(void*)cd->u.loopaes.hdr.hash); |
| free(cd->u.loopaes.cipher); |
| } else if (isVERITY(cd->type)) { |
| free(CONST_CAST(void*)cd->u.verity.hdr.hash_name); |
| free(CONST_CAST(void*)cd->u.verity.hdr.data_device); |
| free(CONST_CAST(void*)cd->u.verity.hdr.hash_device); |
| free(CONST_CAST(void*)cd->u.verity.hdr.fec_device); |
| free(CONST_CAST(void*)cd->u.verity.hdr.salt); |
| free(cd->u.verity.root_hash); |
| free(cd->u.verity.uuid); |
| device_free(cd->u.verity.fec_device); |
| } else if (isINTEGRITY(cd->type)) { |
| free(CONST_CAST(void*)cd->u.integrity.params.integrity); |
| free(CONST_CAST(void*)cd->u.integrity.params.journal_integrity); |
| free(CONST_CAST(void*)cd->u.integrity.params.journal_crypt); |
| crypt_free_volume_key(cd->u.integrity.journal_crypt_key); |
| crypt_free_volume_key(cd->u.integrity.journal_mac_key); |
| } else if (!cd->type) { |
| free(cd->u.none.active_name); |
| cd->u.none.active_name = NULL; |
| } |
| |
| crypt_set_null_type(cd); |
| } |
| |
| static int _init_by_name_crypt(struct crypt_device *cd, const char *name) |
| { |
| struct crypt_dm_active_device dmd = {}, dmdi = {}; |
| char cipher[MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN]; |
| const char *namei; |
| int key_nums, r; |
| |
| 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; |
| |
| r = crypt_parse_name_and_mode(dmd.u.crypt.cipher, cipher, |
| &key_nums, cipher_mode); |
| if (r < 0) { |
| log_dbg("Cannot parse cipher and mode from active device."); |
| goto out; |
| } |
| |
| if (dmd.u.crypt.integrity && (namei = device_dm_name(dmd.data_device))) { |
| r = dm_query_device(cd, namei, DM_ACTIVE_DEVICE, &dmdi); |
| if (r < 0) |
| goto out; |
| if (dmdi.target == DM_INTEGRITY && !cd->metadata_device) { |
| device_free(cd->device); |
| cd->device = dmdi.data_device; |
| } else |
| device_free(dmdi.data_device); |
| } |
| |
| if (isPLAIN(cd->type)) { |
| 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.hdr.sector_size = dmd.u.crypt.sector_size; |
| cd->u.plain.key_size = dmd.u.crypt.vk->keylength; |
| cd->u.plain.cipher = strdup(cipher); |
| cd->u.plain.cipher_mode = strdup(cipher_mode); |
| } else if (isLOOPAES(cd->type)) { |
| cd->u.loopaes.hdr.offset = dmd.u.crypt.offset; |
| 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->u.loopaes.key_size = dmd.u.crypt.vk->keylength / key_nums; |
| } else if (isLUKS1(cd->type) || isLUKS2(cd->type)) { |
| if (crypt_metadata_device(cd)) { |
| r = _crypt_load_luks(cd, cd->type, 0, 0); |
| if (r < 0) { |
| log_dbg("LUKS device header does not match active device."); |
| crypt_set_null_type(cd); |
| r = 0; |
| goto out; |
| } |
| /* check whether UUIDs match each other */ |
| r = crypt_uuid_cmp(dmd.uuid, LUKS_UUID(cd)); |
| if (r < 0) { |
| log_dbg("LUKS device header uuid: %s mismatches DM returned uuid %s", |
| LUKS_UUID(cd), dmd.uuid); |
| crypt_free_type(cd); |
| r = 0; |
| goto out; |
| } |
| } else { |
| log_dbg("LUKS device header not available."); |
| crypt_set_null_type(cd); |
| r = 0; |
| } |
| } 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.u.crypt.integrity); |
| free(CONST_CAST(void*)dmd.uuid); |
| return r; |
| } |
| |
| static int _init_by_name_verity(struct crypt_device *cd, const char *name) |
| { |
| struct crypt_params_verity params = {}; |
| struct crypt_dm_active_device dmd = { |
| .target = DM_VERITY, |
| .u.verity.vp = ¶ms, |
| }; |
| int r, verity_type = 0; |
| |
| r = dm_query_device(cd, name, |
| DM_ACTIVE_DEVICE | |
| DM_ACTIVE_VERITY_HASH_DEVICE | |
| DM_ACTIVE_VERITY_PARAMS, &dmd); |
| if (r < 0) |
| goto out; |
| if (r > 0) |
| r = 0; |
| |
| if (isVERITY(cd->type)) { |
| cd->u.verity.uuid = NULL; // FIXME |
| 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.fec_area_offset = dmd.u.verity.fec_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->u.verity.hdr.fec_device = params.fec_device; |
| cd->u.verity.hdr.fec_roots = params.fec_roots; |
| cd->u.verity.fec_device = dmd.u.verity.fec_device; |
| cd->metadata_device = dmd.u.verity.hash_device; |
| verity_type = 1; |
| } |
| out: |
| if (!verity_type) { |
| free(CONST_CAST(void*)params.hash_name); |
| free(CONST_CAST(void*)params.salt); |
| free(CONST_CAST(void*)params.fec_device); |
| } |
| device_free(dmd.data_device); |
| return r; |
| } |
| |
| static int _init_by_name_integrity(struct crypt_device *cd, const char *name) |
| { |
| struct crypt_dm_active_device dmd = { |
| .target = DM_INTEGRITY, |
| }; |
| int r, integrity_type = 0; |
| |
| r = dm_query_device(cd, name, DM_ACTIVE_DEVICE | |
| DM_ACTIVE_CRYPT_KEY | |
| DM_ACTIVE_CRYPT_KEYSIZE | |
| DM_ACTIVE_INTEGRITY_PARAMS, &dmd); |
| if (r < 0) |
| goto out; |
| if (r > 0) |
| r = 0; |
| |
| if (isINTEGRITY(cd->type)) { |
| cd->u.integrity.params.tag_size = dmd.u.integrity.tag_size; |
| cd->u.integrity.params.sector_size = dmd.u.integrity.sector_size; |
| cd->u.integrity.params.journal_size = dmd.u.integrity.journal_size; |
| cd->u.integrity.params.journal_watermark = dmd.u.integrity.journal_watermark; |
| cd->u.integrity.params.journal_commit_time = dmd.u.integrity.journal_commit_time; |
| cd->u.integrity.params.interleave_sectors = dmd.u.integrity.interleave_sectors; |
| cd->u.integrity.params.buffer_sectors = dmd.u.integrity.buffer_sectors; |
| cd->u.integrity.params.integrity = dmd.u.integrity.integrity; |
| cd->u.integrity.params.journal_integrity = dmd.u.integrity.journal_integrity; |
| cd->u.integrity.params.journal_crypt = dmd.u.integrity.journal_crypt; |
| |
| if (dmd.u.integrity.vk) |
| cd->u.integrity.params.integrity_key_size = dmd.u.integrity.vk->keylength; |
| if (dmd.u.integrity.journal_integrity_key) |
| cd->u.integrity.params.journal_integrity_key_size = dmd.u.integrity.journal_integrity_key->keylength; |
| if (dmd.u.integrity.journal_crypt_key) |
| cd->u.integrity.params.integrity_key_size = dmd.u.integrity.journal_crypt_key->keylength; |
| integrity_type = 1; |
| } |
| out: |
| if (!integrity_type) { |
| free(CONST_CAST(void*)dmd.u.integrity.integrity); |
| free(CONST_CAST(void*)dmd.u.integrity.journal_integrity); |
| free(CONST_CAST(void*)dmd.u.integrity.journal_crypt); |
| } |
| crypt_free_volume_key(dmd.u.integrity.vk); |
| crypt_free_volume_key(dmd.u.integrity.journal_integrity_key); |
| crypt_free_volume_key(dmd.u.integrity.journal_crypt_key); |
| device_free(dmd.data_device); |
| return r; |
| } |
| |
| int crypt_init_by_name_and_header(struct crypt_device **cd, |
| const char *name, |
| const char *header_device) |
| { |
| crypt_status_info ci; |
| struct crypt_dm_active_device dmd = {}; |
| int r; |
| |
| if (!cd || !name) |
| return -EINVAL; |
| |
| log_dbg("Allocating crypt device context by device %s.", name); |
| |
| ci = crypt_status(NULL, name); |
| if (ci == CRYPT_INVALID) |
| return -ENODEV; |
| |
| if (ci < CRYPT_ACTIVE) { |
| log_err(NULL, _("Device %s is not active."), name); |
| return -ENODEV; |
| } |
| |
| r = dm_query_device(NULL, name, DM_ACTIVE_DEVICE | DM_ACTIVE_UUID, &dmd); |
| if (r < 0) |
| goto out; |
| |
| *cd = NULL; |
| |
| 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."), |
| 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; |
| |
| if (dmd.uuid) { |
| if (!strncmp(CRYPT_PLAIN, dmd.uuid, sizeof(CRYPT_PLAIN)-1)) |
| (*cd)->type = strdup(CRYPT_PLAIN); |
| 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_LUKS2, dmd.uuid, sizeof(CRYPT_LUKS2)-1)) |
| (*cd)->type = strdup(CRYPT_LUKS2); |
| 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 if (!strncmp(CRYPT_INTEGRITY, dmd.uuid, sizeof(CRYPT_INTEGRITY)-1)) |
| (*cd)->type = strdup(CRYPT_INTEGRITY); |
| 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); |
| else if (dmd.target == DM_INTEGRITY) |
| r = _init_by_name_integrity(*cd, name); |
| out: |
| if (r < 0) { |
| crypt_free(*cd); |
| *cd = NULL; |
| } else if (!(*cd)->type) { |
| /* For anonymous device (no header found) remember initialized name */ |
| (*cd)->u.none.active_name = strdup(name); |
| } |
| |
| 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); |
| } |
| |
| /* |
| * crypt_format() helpers |
| */ |
| static int _crypt_format_plain(struct crypt_device *cd, |
| const char *cipher, |
| const char *cipher_mode, |
| const char *uuid, |
| size_t volume_key_size, |
| struct crypt_params_plain *params) |
| { |
| unsigned int sector_size = params ? params->sector_size : SECTOR_SIZE; |
| |
| if (!cipher || !cipher_mode) { |
| log_err(cd, _("Invalid plain crypt parameters.")); |
| return -EINVAL; |
| } |
| |
| if (volume_key_size > 1024) { |
| log_err(cd, _("Invalid key size.")); |
| return -EINVAL; |
| } |
| |
| if (uuid) { |
| log_err(cd, _("UUID is not supported for this crypt type.")); |
| return -EINVAL; |
| } |
| |
| /* For compatibility with old params structure */ |
| if (!sector_size) |
| sector_size = SECTOR_SIZE; |
| |
| if (sector_size < SECTOR_SIZE || sector_size > MAX_SECTOR_SIZE || |
| NOTPOW2(sector_size)) { |
| log_err(cd, _("Unsupported encryption sector size.")); |
| return -EINVAL; |
| } |
| |
| 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->u.plain.cipher = strdup(cipher); |
| cd->u.plain.cipher_mode = strdup(cipher_mode); |
| |
| |
| if (params && params->hash) |
| cd->u.plain.hdr.hash = strdup(params->hash); |
| |
| 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; |
| cd->u.plain.hdr.sector_size = sector_size; |
| |
| if (!cd->u.plain.cipher || !cd->u.plain.cipher_mode) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int _crypt_format_luks1(struct crypt_device *cd, |
| const char *cipher, |
| const char *cipher_mode, |
| const char *uuid, |
| const char *volume_key, |
| size_t volume_key_size, |
| struct crypt_params_luks1 *params) |
| { |
| int r; |
| unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT; |
| unsigned long alignment_offset = 0; |
| |
| if (!cipher || !cipher_mode) |
| return -EINVAL; |
| |
| if (!crypt_metadata_device(cd)) { |
| log_err(cd, _("Can't format LUKS without device.")); |
| 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); |
| else |
| cd->volume_key = crypt_generate_volume_key(cd, volume_key_size); |
| |
| if (!cd->volume_key) |
| return -ENOMEM; |
| |
| if (verify_pbkdf_params(cd, &cd->pbkdf)) { |
| r = init_pbkdf_type(cd, NULL, CRYPT_LUKS1); |
| if (r) |
| return r; |
| } |
| |
| if (params && params->hash && strcmp(params->hash, cd->pbkdf.hash)) { |
| free(CONST_CAST(void*)cd->pbkdf.hash); |
| cd->pbkdf.hash = strdup(params->hash); |
| if (!cd->pbkdf.hash) |
| return -ENOMEM; |
| } |
| |
| 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 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); |
| |
| r = LUKS_check_cipher(cd, volume_key_size, cipher, cipher_mode); |
| if (r < 0) |
| return r; |
| |
| r = LUKS_generate_phdr(&cd->u.luks1.hdr, cd->volume_key, cipher, cipher_mode, |
| cd->pbkdf.hash, uuid, LUKS_STRIPES, |
| required_alignment / SECTOR_SIZE, |
| alignment_offset / SECTOR_SIZE, |
| cd->metadata_device ? 1 : 0, cd); |
| if (r < 0) |
| return r; |
| |
| r = device_check_access(cd, crypt_metadata_device(cd), DEV_EXCL); |
| if (r < 0) |
| return r; |
| |
| r = LUKS_wipe_header_areas(&cd->u.luks1.hdr, cd); |
| if (r < 0) { |
| log_err(cd, _("Cannot wipe header on device %s."), |
| mdata_device_path(cd)); |
| return r; |
| } |
| |
| r = LUKS_write_phdr(&cd->u.luks1.hdr, cd); |
| |
| return r; |
| } |
| |
| static int _crypt_format_luks2(struct crypt_device *cd, |
| const char *cipher, |
| const char *cipher_mode, |
| const char *uuid, |
| const char *volume_key, |
| size_t volume_key_size, |
| struct crypt_params_luks2 *params) |
| { |
| int r, integrity_key_size = 0; |
| unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT; |
| unsigned long alignment_offset = 0; |
| unsigned int sector_size = params ? params->sector_size : SECTOR_SIZE; |
| const char *integrity = params ? params->integrity : NULL; |
| |
| cd->u.luks2.hdr.jobj = NULL; |
| |
| if (!cipher || !cipher_mode) |
| return -EINVAL; |
| |
| if (!crypt_metadata_device(cd)) { |
| log_err(cd, _("Can't format LUKS without device.")); |
| return -EINVAL; |
| } |
| |
| if (sector_size < SECTOR_SIZE || sector_size > MAX_SECTOR_SIZE || |
| NOTPOW2(sector_size)) { |
| log_err(cd, _("Unsupported encryption sector size.")); |
| return -EINVAL; |
| } |
| |
| if (integrity) { |
| if (params->integrity_params) { |
| /* Standalone dm-integrity must not be used */ |
| if (params->integrity_params->integrity || |
| params->integrity_params->integrity_key_size) |
| return -EINVAL; |
| /* FIXME: journal encryption and MAC is here not yet supported */ |
| if (params->integrity_params->journal_crypt || |
| params->integrity_params->journal_integrity) |
| return -ENOTSUP; |
| } |
| if (!INTEGRITY_tag_size(cd, integrity, cipher, cipher_mode)) { |
| if (!strcmp(integrity, "none")) |
| integrity = NULL; |
| else |
| return -EINVAL; |
| } |
| integrity_key_size = INTEGRITY_key_size(cd, integrity); |
| if ((integrity_key_size < 0) || (integrity_key_size >= (int)volume_key_size)) { |
| log_err(cd, _("Volume key is too small for encryption with integrity extensions.")); |
| return -EINVAL; |
| } |
| } |
| |
| r = device_check_access(cd, crypt_metadata_device(cd), DEV_EXCL); |
| if (r < 0) |
| return r; |
| |
| if (!(cd->type = strdup(CRYPT_LUKS2))) |
| return -ENOMEM; |
| |
| if (volume_key) |
| cd->volume_key = crypt_alloc_volume_key(volume_key_size, |
| volume_key); |
| else |
| cd->volume_key = crypt_generate_volume_key(cd, volume_key_size); |
| |
| if (!cd->volume_key) |
| return -ENOMEM; |
| |
| if (params && params->pbkdf) |
| r = crypt_set_pbkdf_type(cd, params->pbkdf); |
| else if (verify_pbkdf_params(cd, &cd->pbkdf)) |
| r = init_pbkdf_type(cd, NULL, CRYPT_LUKS2); |
| |
| if (r < 0) |
| return r; |
| |
| 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 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); |
| |
| /* Save cipher and mode, compatibility only. */ |
| cd->u.luks2.cipher = strdup(cipher); |
| cd->u.luks2.cipher_mode = strdup(cipher_mode); |
| if (!cd->u.luks2.cipher || !cd->u.luks2.cipher_mode) { |
| r = -ENOMEM; |
| goto out; |
| } |
| |
| /* FIXME: we have no way how to check AEAD ciphers, |
| * only length preserving mode or authenc() composed modes */ |
| if ((!integrity || integrity_key_size) && !LUKS2_keyslot_cipher_incompatible(cd)) { |
| r = LUKS_check_cipher(cd, volume_key_size - integrity_key_size, |
| cipher, cipher_mode); |
| if (r < 0) |
| goto out; |
| } |
| |
| r = LUKS2_generate_hdr(cd, &cd->u.luks2.hdr, cd->volume_key, |
| cipher, cipher_mode, |
| integrity, uuid, |
| sector_size, |
| required_alignment, |
| alignment_offset, |
| cd->metadata_device ? 1 : 0); |
| if (r < 0) |
| goto out; |
| |
| if (params && (params->label || params->subsystem)) { |
| r = LUKS2_hdr_labels(cd, &cd->u.luks2.hdr, |
| params->label, params->subsystem, 0); |
| if (r < 0) |
| goto out; |
| } |
| |
| r = LUKS2_wipe_header_areas(cd, &cd->u.luks2.hdr); |
| if (r < 0) { |
| log_err(cd, _("Cannot wipe header on device %s."), |
| mdata_device_path(cd)); |
| goto out; |
| } |
| |
| /* Wipe integrity superblock and create integrity superblock */ |
| if (crypt_get_integrity_tag_size(cd)) { |
| r = crypt_wipe_device(cd, crypt_data_device(cd), CRYPT_WIPE_ZERO, |
| crypt_get_data_offset(cd) * SECTOR_SIZE, |
| 8 * SECTOR_SIZE, 8 * SECTOR_SIZE, NULL, NULL); |
| if (r < 0) { |
| if (r == -EBUSY) |
| log_err(cd, _("Cannot format device %s which is still in use."), |
| data_device_path(cd)); |
| else if (r == -EACCES) { |
| log_err(cd, _("Cannot format device %s, permission denied."), |
| data_device_path(cd)); |
| r = -EINVAL; |
| } else |
| log_err(cd, _("Cannot wipe header on device %s."), |
| data_device_path(cd)); |
| |
| goto out; |
| } |
| |
| r = INTEGRITY_format(cd, params ? params->integrity_params : NULL, NULL, NULL); |
| if (r) |
| log_err(cd, _("Cannot format integrity for device %s."), |
| data_device_path(cd)); |
| } |
| |
| if (r < 0) |
| goto out; |
| |
| r = LUKS2_hdr_write(cd, &cd->u.luks2.hdr); |
| if (r < 0) { |
| if (r == -EBUSY) |
| log_err(cd, _("Cannot format device %s in use."), |
| mdata_device_path(cd)); |
| else if (r == -EACCES) { |
| log_err(cd, _("Cannot format device %s, permission denied."), |
| mdata_device_path(cd)); |
| r = -EINVAL; |
| } else |
| log_err(cd, _("Cannot format device %s."), |
| mdata_device_path(cd)); |
| } |
| |
| out: |
| if (r) { |
| LUKS2_hdr_free(&cd->u.luks2.hdr); |
| free(cd->u.luks2.cipher); |
| free(cd->u.luks2.cipher_mode); |
| cd->u.luks2.cipher = NULL; |
| cd->u.luks2.cipher_mode = NULL; |
| } |
| |
| 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.")); |
| return -EINVAL; |
| } |
| |
| if (volume_key_size > 1024) { |
| log_err(cd, _("Invalid key size.")); |
| return -EINVAL; |
| } |
| |
| if (uuid) { |
| log_err(cd, _("UUID is not supported for this crypt type.")); |
| return -EINVAL; |
| } |
| |
| if (!(cd->type = strdup(CRYPT_LOOPAES))) |
| return -ENOMEM; |
| |
| cd->u.loopaes.key_size = volume_key_size; |
| |
| cd->u.loopaes.cipher = strdup(cipher ?: DEFAULT_LOOPAES_CIPHER); |
| |
| if (params && params->hash) |
| cd->u.loopaes.hdr.hash = strdup(params->hash); |
| |
| 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, hash_size; |
| uint64_t data_device_size, hash_blocks_size; |
| struct device *fec_device = NULL; |
| char *fec_device_path = NULL, *hash_name = NULL, *root_hash = NULL, *salt = NULL; |
| |
| if (!crypt_metadata_device(cd)) { |
| log_err(cd, _("Can't format VERITY without device.")); |
| 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."), 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.")); |
| return -EINVAL; |
| } |
| |
| if (MISALIGNED_512(params->hash_area_offset)) { |
| log_err(cd, _("Unsupported VERITY hash offset.")); |
| return -EINVAL; |
| } |
| |
| if (MISALIGNED_512(params->fec_area_offset)) { |
| log_err(cd, _("Unsupported VERITY FEC offset.")); |
| 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->u.verity.hdr.data_size = data_device_size / params->data_block_size; |
| } else |
| cd->u.verity.hdr.data_size = params->data_size; |
| |
| if (device_is_identical(crypt_metadata_device(cd), crypt_data_device(cd)) && |
| (cd->u.verity.hdr.data_size * params->data_block_size) > params->hash_area_offset) { |
| log_err(cd, _("Data area overlaps with hash area.")); |
| return -EINVAL; |
| } |
| |
| hash_size = crypt_hash_size(params->hash_name); |
| if (hash_size <= 0) { |
| log_err(cd, _("Hash algorithm %s not supported."), |
| params->hash_name); |
| return -EINVAL; |
| } |
| cd->u.verity.root_hash_size = hash_size; |
| |
| if (params->fec_device) { |
| fec_device_path = strdup(params->fec_device); |
| if (!fec_device_path) |
| return -ENOMEM; |
| r = device_alloc(&fec_device, params->fec_device); |
| if (r < 0) { |
| r = -ENOMEM; |
| goto err; |
| } |
| |
| hash_blocks_size = VERITY_hash_blocks(cd, params) * params->hash_block_size; |
| if (device_is_identical(crypt_metadata_device(cd), fec_device) && |
| (params->hash_area_offset + hash_blocks_size) > params->fec_area_offset) { |
| log_err(cd, _("Hash area overlaps with FEC area.")); |
| r = -EINVAL; |
| goto err; |
| } |
| |
| if (device_is_identical(crypt_data_device(cd), fec_device) && |
| (cd->u.verity.hdr.data_size * params->data_block_size) > params->fec_area_offset) { |
| log_err(cd, _("Data area overlaps with FEC area.")); |
| r = -EINVAL; |
| goto err; |
| } |
| } |
| |
| root_hash = malloc(cd->u.verity.root_hash_size); |
| hash_name = strdup(params->hash_name); |
| salt = malloc(params->salt_size); |
| |
| if (!root_hash || !hash_name || !salt) { |
| r = -ENOMEM; |
| goto err; |
| } |
| |
| cd->u.verity.hdr.flags = params->flags; |
| cd->u.verity.root_hash = root_hash; |
| cd->u.verity.hdr.hash_name = hash_name; |
| cd->u.verity.hdr.data_device = NULL; |
| cd->u.verity.fec_device = fec_device; |
| cd->u.verity.hdr.fec_device = fec_device_path; |
| cd->u.verity.hdr.fec_roots = params->fec_roots; |
| 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.fec_area_offset = params->fec_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; |
| cd->u.verity.hdr.salt = salt; |
| |
| if (params->salt) |
| memcpy(salt, params->salt, params->salt_size); |
| else |
| r = crypt_random_get(cd, salt, params->salt_size, CRYPT_RND_SALT); |
| if (r) |
| goto err; |
| |
| if (params->flags & CRYPT_VERITY_CREATE_HASH) { |
| r = VERITY_create(cd, &cd->u.verity.hdr, |
| cd->u.verity.root_hash, cd->u.verity.root_hash_size); |
| if (!r && params->fec_device) |
| r = VERITY_FEC_process(cd, &cd->u.verity.hdr, cd->u.verity.fec_device, 0, NULL); |
| if (r) |
| goto err; |
| } |
| |
| if (!(params->flags & CRYPT_VERITY_NO_HEADER)) { |
| if (uuid) { |
| if (!(cd->u.verity.uuid = strdup(uuid))) |
| r = -ENOMEM; |
| } else |
| r = VERITY_UUID_generate(cd, &cd->u.verity.uuid); |
| |
| if (!r) |
| r = VERITY_write_sb(cd, cd->u.verity.hdr.hash_area_offset, |
| cd->u.verity.uuid, |
| &cd->u.verity.hdr); |
| } |
| |
| err: |
| if (r) { |
| device_free(fec_device); |
| free(root_hash); |
| free(hash_name); |
| free(fec_device_path); |
| free(salt); |
| } |
| |
| return r; |
| } |
| |
| static int _crypt_format_integrity(struct crypt_device *cd, |
| const char *uuid, |
| struct crypt_params_integrity *params) |
| { |
| int r; |
| char *integrity = NULL, *journal_integrity = NULL, *journal_crypt = NULL; |
| struct volume_key *journal_crypt_key = NULL, *journal_mac_key = NULL; |
| |
| if (!params) |
| return -EINVAL; |
| |
| if (uuid) { |
| log_err(cd, _("UUID is not supported for this crypt type.")); |
| return -EINVAL; |
| } |
| |
| r = device_check_access(cd, crypt_metadata_device(cd), DEV_EXCL); |
| if (r < 0) |
| return r; |
| |
| /* Wipe first 8 sectors - fs magic numbers etc. */ |
| r = crypt_wipe_device(cd, crypt_metadata_device(cd), CRYPT_WIPE_ZERO, 0, |
| 8 * SECTOR_SIZE, 8 * SECTOR_SIZE, NULL, NULL); |
| if (r < 0) { |
| log_err(cd, _("Cannot wipe header on device %s."), |
| mdata_device_path(cd)); |
| return r; |
| } |
| |
| if (!(cd->type = strdup(CRYPT_INTEGRITY))) |
| return -ENOMEM; |
| |
| if (params->journal_crypt_key) { |
| journal_crypt_key = crypt_alloc_volume_key(params->journal_crypt_key_size, |
| params->journal_crypt_key); |
| if (!journal_crypt_key) |
| return -ENOMEM; |
| } |
| |
| if (params->journal_integrity_key) { |
| journal_mac_key = crypt_alloc_volume_key(params->journal_integrity_key_size, |
| params->journal_integrity_key); |
| if (!journal_mac_key) { |
| r = -ENOMEM; |
| goto err; |
| } |
| } |
| |
| if (params->integrity && !(integrity = strdup(params->integrity))) { |
| r = -ENOMEM; |
| goto err; |
| } |
| if (params->journal_integrity && !(journal_integrity = strdup(params->journal_integrity))) { |
| r = -ENOMEM; |
| goto err; |
| } |
| if (params->journal_crypt && !(journal_crypt = strdup(params->journal_crypt))) { |
| r = -ENOMEM; |
| goto err; |
| } |
| |
| cd->u.integrity.journal_crypt_key = journal_crypt_key; |
| cd->u.integrity.journal_mac_key = journal_mac_key; |
| cd->u.integrity.params.journal_size = params->journal_size; |
| cd->u.integrity.params.journal_watermark = params->journal_watermark; |
| cd->u.integrity.params.journal_commit_time = params->journal_commit_time; |
| cd->u.integrity.params.interleave_sectors = params->interleave_sectors; |
| cd->u.integrity.params.buffer_sectors = params->buffer_sectors; |
| cd->u.integrity.params.sector_size = params->sector_size; |
| cd->u.integrity.params.tag_size = params->tag_size; |
| cd->u.integrity.params.integrity = integrity; |
| cd->u.integrity.params.journal_integrity = journal_integrity; |
| cd->u.integrity.params.journal_crypt = journal_crypt; |
| |
| r = INTEGRITY_format(cd, params, cd->u.integrity.journal_crypt_key, cd->u.integrity.journal_mac_key); |
| if (r) |
| log_err(cd, _("Cannot format integrity for device %s."), |
| mdata_device_path(cd)); |
| err: |
| if (r) { |
| crypt_free_volume_key(journal_crypt_key); |
| crypt_free_volume_key(journal_mac_key); |
| free(integrity); |
| free(journal_integrity); |
| free(journal_crypt); |
| } |
| |
| return r; |
| } |
| |
| int crypt_format(struct crypt_device *cd, |
| const char *type, |
| const char *cipher, |
| const char *cipher_mode, |
| const char *uuid, |
| const char *volume_key, |
| size_t volume_key_size, |
| void *params) |
| { |
| int r; |
| |
| if (!cd || !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); |
| |
| crypt_reset_null_type(cd); |
| |
| r = init_crypto(cd); |
| if (r < 0) |
| return r; |
| |
| if (isPLAIN(type)) |
| r = _crypt_format_plain(cd, cipher, cipher_mode, |
| uuid, volume_key_size, params); |
| else if (isLUKS1(type)) |
| r = _crypt_format_luks1(cd, cipher, cipher_mode, |
| uuid, volume_key, volume_key_size, params); |
| else if (isLUKS2(type)) |
| r = _crypt_format_luks2(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 if (isINTEGRITY(type)) |
| r = _crypt_format_integrity(cd, uuid, params); |
| else { |
| log_err(cd, _("Unknown crypt device type %s requested."), type); |
| r = -EINVAL; |
| } |
| |
| if (r < 0) { |
| crypt_set_null_type(cd); |
| crypt_free_volume_key(cd->volume_key); |
| cd->volume_key = NULL; |
| } |
| |
| return r; |
| } |
| |
| int crypt_repair(struct crypt_device *cd, |
| const char *requested_type, |
| void *params __attribute__((unused))) |
| { |
| int r; |
| |
| if (!cd) |
| return -EINVAL; |
| |
| log_dbg("Trying to repair %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)) |
| return -EINVAL; |
| |
| /* Load with repair */ |
| r = _crypt_load_luks(cd, requested_type, 1, 1); |
| if (r < 0) |
| return r; |
| |
| /* cd->type and header must be set in context */ |
| r = crypt_check_data_device_size(cd); |
| if (r < 0) |
| crypt_set_null_type(cd); |
| |
| return r; |
| } |
| |
| int crypt_resize(struct crypt_device *cd, const char *name, uint64_t new_size) |
| { |
| struct crypt_dm_active_device dmd = {}; |
| int r; |
| |
| /* |
| * FIXME: check context uuid matches the dm-crypt device uuid. |
| * Currently it's possible to resize device (name) |
| * unrelated to device loaded in context. |
| * |
| * Also with LUKS2 we must not allow resize when there's |
| * explicit size stored in metadata (length != "dynamic") |
| */ |
| |
| /* Device context type must be initialised */ |
| if (!cd || !cd->type || !name) |
| return -EINVAL; |
| |
| 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."), name); |
| return -EINVAL; |
| } |
| |
| if (!dmd.uuid || dmd.target != DM_CRYPT) { |
| r = -EINVAL; |
| goto out; |
| } |
| |
| if ((dmd.flags & CRYPT_ACTIVATE_KEYRING_KEY) && !crypt_key_in_keyring(cd)) { |
| r = -EPERM; |
| goto out; |
| } |
| |
| if (crypt_key_in_keyring(cd)) { |
| if (!isLUKS2(cd->type)) { |
| r = -EINVAL; |
| goto out; |
| } |
| r = LUKS2_key_description_by_segment(cd, &cd->u.luks2.hdr, |
| dmd.u.crypt.vk, CRYPT_DEFAULT_SEGMENT); |
| if (r) |
| goto out; |
| |
| dmd.flags |= CRYPT_ACTIVATE_KEYRING_KEY; |
| } |
| |
| if (crypt_loop_device(crypt_get_device_name(cd))) { |
| log_dbg("Trying to resize underlying loop device %s.", |
| crypt_get_device_name(cd)); |
| /* Here we always use default size not new_size */ |
| if (crypt_loop_resize(crypt_get_device_name(cd))) |
| log_err(NULL, _("Cannot resize loop device.")); |
| } |
| |
| r = device_block_adjust(cd, dmd.data_device, DEV_OK, |
| dmd.u.crypt.offset, &new_size, &dmd.flags); |
| if (r) |
| goto out; |
| |
| if (MISALIGNED(new_size, dmd.u.crypt.sector_size >> SECTOR_SHIFT)) { |
| log_err(cd, _("Device %s size is not aligned to requested sector size (%u bytes)."), |
| crypt_get_device_name(cd), (unsigned)dmd.u.crypt.sector_size); |
| r = -EINVAL; |
| goto out; |
| } |
| |
| if (new_size == dmd.size) { |
| log_dbg("Device has already requested size %" PRIu64 |
| " sectors.", dmd.size); |
| r = 0; |
| } else { |
| dmd.size = new_size; |
| if (isTCRYPT(cd->type)) |
| r = -ENOTSUP; |
| else if (isLUKS2(cd->type)) |
| r = LUKS2_unmet_requirements(cd, &cd->u.luks2.hdr, 0, 0); |
| if (!r) |
| r = dm_create_device(cd, name, cd->type, &dmd, 1); |
| } |
| out: |
| 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.u.crypt.integrity); |
| } |
| device_free(dmd.data_device); |
| free(CONST_CAST(void*)dmd.uuid); |
| |
| return r; |
| } |
| |
| int crypt_set_uuid(struct crypt_device *cd, const char *uuid) |
| { |
| const char *active_uuid; |
| int r; |
| |
| log_dbg("%s device uuid.", uuid ? "Setting new" : "Refreshing"); |
| |
| if ((r = onlyLUKS(cd))) |
| return r; |
| |
| active_uuid = crypt_get_uuid(cd); |
| |
| if (uuid && active_uuid && !strncmp(uuid, active_uuid, UUID_STRING_L)) { |
| log_dbg("UUID is the same as requested (%s) for device %s.", |
| uuid, mdata_device_path(cd)); |
| return 0; |
| } |
| |
| if (uuid) |
| 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_path(cd)); |
| |
| if (!crypt_confirm(cd, _("Do you really want to change UUID of device?"))) |
| return -EPERM; |
| |
| if (isLUKS1(cd->type)) |
| return LUKS_hdr_uuid_set(&cd->u.luks1.hdr, uuid, cd); |
| else |
| return LUKS2_hdr_uuid(cd, &cd->u.luks2.hdr, uuid); |
| } |
| |
| int crypt_set_label(struct crypt_device *cd, const char *label, const char *subsystem) |
| { |
| int r; |
| |
| log_dbg("Setting new labels."); |
| |
| if ((r = onlyLUKS2(cd))) |
| return r; |
| |
| return LUKS2_hdr_labels(cd, &cd->u.luks2.hdr, label, subsystem, 1); |
| } |
| |
| int crypt_header_backup(struct crypt_device *cd, |
| const char *requested_type, |
| const char *backup_file) |
| { |
| int r; |
| |
| if (requested_type && !isLUKS(requested_type)) |
| return -EINVAL; |
| |
| if (!backup_file) |
| return -EINVAL; |
| |
| /* Load with repair */ |
| r = _crypt_load_luks(cd, requested_type, 1, 0); |
| if (r < 0) |
| return r; |
| |
| log_dbg("Requested header backup of device %s (%s) to " |
| "file %s.", mdata_device_path(cd), requested_type ?: "any type", backup_file); |
| |
| if (isLUKS1(cd->type) && (!requested_type || isLUKS1(requested_type))) |
| r = LUKS_hdr_backup(backup_file, cd); |
| else if (isLUKS2(cd->type) && (!requested_type || isLUKS2(requested_type))) |
| r = LUKS2_hdr_backup(cd, &cd->u.luks2.hdr, backup_file); |
| else |
| r = -EINVAL; |
| |
| return r; |
| } |
| |
| int crypt_header_restore(struct crypt_device *cd, |
| const char *requested_type, |
| const char *backup_file) |
| { |
| struct luks_phdr hdr1; |
| struct luks2_hdr hdr2; |
| int r, version; |
| |
| if (requested_type && !isLUKS(requested_type)) |
| return -EINVAL; |
| |
| if (!cd || (cd->type && !isLUKS(cd->type)) || !backup_file) |
| return -EINVAL; |
| |
| r = init_crypto(cd); |
| if (r < 0) |
| return r; |
| |
| log_dbg("Requested header restore to device %s (%s) from " |
| "file %s.", mdata_device_path(cd), requested_type ?: "any type", backup_file); |
| |
| version = LUKS2_hdr_version_unlocked(cd, backup_file); |
| if (!version || |
| (requested_type && version == 1 && !isLUKS1(requested_type)) || |
| (requested_type && version == 2 && !isLUKS2(requested_type))) { |
| log_err(cd, _("Header backup file does not contain compatible LUKS header.")); |
| return -EINVAL; |
| } |
| |
| memset(&hdr2, 0, sizeof(hdr2)); |
| |
| if (!cd->type) { |
| if (version == 1) |
| r = LUKS_hdr_restore(backup_file, &hdr1, cd); |
| else |
| r = LUKS2_hdr_restore(cd, &hdr2, backup_file); |
| |
| crypt_memzero(&hdr1, sizeof(hdr1)); |
| crypt_memzero(&hdr2, sizeof(hdr2)); |
| } else if (isLUKS2(cd->type) && (!requested_type || isLUKS2(requested_type))) { |
| r = LUKS2_hdr_restore(cd, &cd->u.luks2.hdr, backup_file); |
| if (r) |
| _luks2_reload(cd); |
| } else if (isLUKS1(cd->type) && (!requested_type || isLUKS1(requested_type))) |
| r = LUKS_hdr_restore(backup_file, &cd->u.luks1.hdr, cd); |
| else |
| r = -EINVAL; |
| |
| if (!r) |
| r = _crypt_load_luks(cd, version == 1 ? CRYPT_LUKS1 : CRYPT_LUKS2, 1, 1); |
| |
| return r; |
| } |
| |
| void crypt_free(struct crypt_device *cd) |
| { |
| if (!cd) |
| return; |
| |
| log_dbg("Releasing crypt device %s context.", mdata_device_path(cd)); |
| |
| dm_backend_exit(); |
| crypt_free_volume_key(cd->volume_key); |
| |
| device_free(cd->device); |
| device_free(cd->metadata_device); |
| |
| free(CONST_CAST(void*)cd->pbkdf.type); |
| free(CONST_CAST(void*)cd->pbkdf.hash); |
| |
| crypt_free_type(cd); |
| |
| /* Some structures can contain keys (TCRYPT), wipe it */ |
| crypt_memzero(cd, sizeof(*cd)); |
| free(cd); |
| } |
| |
| static char *crypt_get_device_key_description(const char *name) |
| { |
| char *tmp = NULL; |
| struct crypt_dm_active_device dmd; |
| |
| if (dm_query_device(NULL, name, DM_ACTIVE_CRYPT_KEY | DM_ACTIVE_CRYPT_KEYSIZE, &dmd) < 0) |
| return NULL; |
| |
| if (dmd.target == DM_CRYPT) { |
| if ((dmd.flags & CRYPT_ACTIVATE_KEYRING_KEY) && dmd.u.crypt.vk->key_description) |
| tmp = strdup(dmd.u.crypt.vk->key_description); |
| crypt_free_volume_key(dmd.u.crypt.vk); |
| } else if (dmd.target == DM_INTEGRITY) { |
| crypt_free_volume_key(dmd.u.integrity.vk); |
| } |
| |
| return tmp; |
| } |
| |
| int crypt_suspend(struct crypt_device *cd, |
| const char *name) |
| { |
| char *key_desc; |
| crypt_status_info ci; |
| int r; |
| |
| /* FIXME: check context uuid matches the dm-crypt device uuid (onlyLUKS branching) */ |
| |
| if (!cd || !name) |
| return -EINVAL; |
| |
| log_dbg("Suspending volume %s.", name); |
| |
| if (cd->type) |
| r = onlyLUKS(cd); |
| else { |
| r = crypt_uuid_type_cmp(cd, CRYPT_LUKS1); |
| if (r < 0) |
| r = crypt_uuid_type_cmp(cd, CRYPT_LUKS2); |
| if (r < 0) |
| log_err(cd, _("This operation is supported only for LUKS device.")); |
| } |
| |
| if (r < 0) |
| return r; |
| |
| ci = crypt_status(NULL, name); |
| if (ci < CRYPT_ACTIVE) { |
| log_err(cd, _("Volume %s is not active."), name); |
| return -EINVAL; |
| } |
| |
| dm_backend_init(); |
| |
| r = dm_status_suspended(cd, name); |
| if (r < 0) |
| goto out; |
| |
| if (r) { |
| log_err(cd, _("Volume %s is already suspended."), name); |
| r = -EINVAL; |
| goto out; |
| } |
| |
| key_desc = crypt_get_device_key_description(name); |
| |
| /* we can't simply wipe wrapped keys */ |
| if (crypt_cipher_wrapped_key(crypt_get_cipher(cd))) |
| r = dm_suspend_device(cd, name); |
| else |
| r = dm_suspend_and_wipe_key(cd, name); |
| |
| if (r == -ENOTSUP) |
| log_err(cd, _("Suspend is not supported for device %s."), name); |
| else if (r) |
| log_err(cd, _("Error during suspending device %s."), name); |
| else |
| crypt_drop_keyring_key(cd, key_desc); |
| free(key_desc); |
| out: |
| dm_backend_exit(); |
| return r; |
| } |
| |
| int crypt_resume_by_passphrase(struct crypt_device *cd, |
| const char *name, |
| int keyslot, |
| const char *passphrase, |
| size_t passphrase_size) |
| { |
| struct volume_key *vk = NULL; |
| int r; |
| |
| /* FIXME: check context uuid matches the dm-crypt device uuid */ |
| |
| if (!passphrase || !name) |
| return -EINVAL; |
| |
| log_dbg("Resuming volume %s.", name); |
| |
| if ((r = onlyLUKS(cd))) |
| return r; |
| |
| r = dm_status_suspended(cd, name); |
| if (r < 0) |
| return r; |
| |
| if (!r) { |
| log_err(cd, _("Volume %s is not suspended."), name); |
| return -EINVAL; |
| } |
| |
| if (isLUKS1(cd->type)) |
| r = LUKS_open_key_with_hdr(keyslot, passphrase, passphrase_size, |
| &cd->u.luks1.hdr, &vk, cd); |
| else |
| r = LUKS2_keyslot_open(cd, keyslot, CRYPT_DEFAULT_SEGMENT, passphrase, passphrase_size, &vk); |
| |
| if (r < 0) |
| goto out; |
| |
| keyslot = r; |
| |
| if (crypt_use_keyring_for_vk(cd)) { |
| if (!isLUKS2(cd->type)) { |
| r = -EINVAL; |
| goto out; |
| } |
| r = LUKS2_volume_key_load_in_keyring_by_keyslot(cd, |
| &cd->u.luks2.hdr, vk, keyslot); |
| if (r < 0) |
| goto out; |
| } |
| |
| r = dm_resume_and_reinstate_key(cd, name, vk); |
| |
| if (r == -ENOTSUP) |
| log_err(cd, _("Resume is not supported for device %s."), name); |
| else if (r) |
| log_err(cd, _("Error during resuming device %s."), name); |
| out: |
| if (r < 0 && vk) |
| crypt_drop_keyring_key(cd, vk->key_description); |
| crypt_free_volume_key(vk); |
| |
| return r < 0 ? r : keyslot; |
| } |
| |
| int crypt_resume_by_keyfile_device_offset(struct crypt_device *cd, |
| const char *name, |
| int keyslot, |
| const char *keyfile, |
| size_t keyfile_size, |
| uint64_t keyfile_offset) |
| { |
| struct volume_key *vk = NULL; |
| char *passphrase_read = NULL; |
| size_t passphrase_size_read; |
| int r; |
| |
| /* FIXME: check context uuid matches the dm-crypt device uuid */ |
| |
| if (!name || !keyfile) |
| return -EINVAL; |
| |
| log_dbg("Resuming volume %s.", name); |
| |
| if ((r = onlyLUKS(cd))) |
| return r; |
| |
| r = dm_status_suspended(cd, name); |
| if (r < 0) |
| return r; |
| |
| if (!r) { |
| log_err(cd, _("Volume %s is not suspended."), name); |
| return -EINVAL; |
| } |
| |
| r = crypt_keyfile_device_read(cd, keyfile, |
| &passphrase_read, &passphrase_size_read, |
| keyfile_offset, keyfile_size, 0); |
| if (r < 0) |
| goto out; |
| |
| if (isLUKS1(cd->type)) |
| r = LUKS_open_key_with_hdr(keyslot, passphrase_read, passphrase_size_read, |
| &cd->u.luks1.hdr, &vk, cd); |
| else |
| r = LUKS2_keyslot_open(cd, keyslot, CRYPT_DEFAULT_SEGMENT, passphrase_read, passphrase_size_read, &vk); |
| if (r < 0) |
| goto out; |
| keyslot = r; |
| |
| if (crypt_use_keyring_for_vk(cd)) { |
| if (!isLUKS2(cd->type)) { |
| r = -EINVAL; |
| goto out; |
| } |
| r = LUKS2_volume_key_load_in_keyring_by_keyslot(cd, |
| &cd->u.luks2.hdr, vk, keyslot); |
| if (r < 0) |
| goto out; |
| } |
| |
| r = dm_resume_and_reinstate_key(cd, name, vk); |
| if (r) |
| log_err(cd, _("Error during resuming device %s."), name); |
| out: |
| crypt_safe_free(passphrase_read); |
| if (r < 0 && vk) |
| crypt_drop_keyring_key(cd, vk->key_description); |
| crypt_free_volume_key(vk); |
| 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_device_offset(cd, name, keyslot, |
| keyfile, keyfile_size, 0); |
| } |
| |
| 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) |
| { |
| return crypt_resume_by_keyfile_device_offset(cd, name, keyslot, |
| keyfile, keyfile_size, keyfile_offset); |
| } |
| |
| /* |
| * Keyslot manipulation |
| */ |
| int crypt_keyslot_add_by_passphrase(struct crypt_device *cd, |
| int keyslot, // -1 any |
| const char *passphrase, |
| size_t passphrase_size, |
| const char *new_passphrase, |
| size_t new_passphrase_size) |
| { |
| int digest, r, active_slots; |
| struct luks2_keyslot_params params; |
| struct volume_key *vk = NULL; |
| |
| log_dbg("Adding new keyslot, existing passphrase %sprovided," |
| "new passphrase %sprovided.", |
| passphrase ? "" : "not ", new_passphrase ? "" : "not "); |
| |
| if ((r = onlyLUKS(cd))) |
| return r; |
| |
| if (!passphrase || !new_passphrase) |
| return -EINVAL; |
| |
| r = keyslot_verify_or_find_empty(cd, &keyslot); |
| if (r) |
| return r; |
| |
| if (isLUKS1(cd->type)) |
| active_slots = LUKS_keyslot_active_count(&cd->u.luks1.hdr); |
| else |
| active_slots = LUKS2_keyslot_active_count(&cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT); |
| if (active_slots == 0) { |
| /* 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); |
| r = vk ? 0 : -ENOMEM; |
| } else { |
| log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.")); |
| return -EINVAL; |
| } |
| } else if (active_slots < 0) |
| return -EINVAL; |
| else { |
| /* Passphrase provided, use it to unlock existing keyslot */ |
| if (isLUKS1(cd->type)) |
| r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, passphrase, |
| passphrase_size, &cd->u.luks1.hdr, &vk, cd); |
| else |
| r = LUKS2_keyslot_open(cd, CRYPT_ANY_SLOT, CRYPT_DEFAULT_SEGMENT, passphrase, |
| passphrase_size, &vk); |
| } |
| |
| if (r < 0) |
| goto out; |
| |
| if (isLUKS1(cd->type)) |
| r = LUKS_set_key(keyslot, CONST_CAST(char*)new_passphrase, |
| new_passphrase_size, &cd->u.luks1.hdr, vk, cd); |
| else { |
| r = LUKS2_digest_verify_by_segment(cd, &cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT, vk); |
| digest = r; |
| |
| if (r >= 0) |
| r = LUKS2_keyslot_params_default(cd, &cd->u.luks2.hdr, vk->keylength, ¶ms); |
| |
| if (r >= 0) |
| r = LUKS2_digest_assign(cd, &cd->u.luks2.hdr, keyslot, digest, 1, 0); |
| |
| if (r >= 0) |
| r = LUKS2_keyslot_store(cd, &cd->u.luks2.hdr, keyslot, |
| CONST_CAST(char*)new_passphrase, |
| new_passphrase_size, vk, ¶ms); |
| } |
| |
| if (r < 0) |
| goto out; |
| |
| r = 0; |
| out: |
| crypt_free_volume_key(vk); |
| if (r < 0) { |
| _luks2_reload(cd); |
| return r; |
| } |
| return 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) |
| { |
| int digest = -1, r; |
| struct luks2_keyslot_params params; |
| struct volume_key *vk = NULL; |
| |
| if (!passphrase || !new_passphrase) |
| return -EINVAL; |
| |
| log_dbg("Changing passphrase from old keyslot %d to new %d.", |
| keyslot_old, keyslot_new); |
| |
| if ((r = onlyLUKS(cd))) |
| return r; |
| |
| if (isLUKS1(cd->type)) |
| r = LUKS_open_key_with_hdr(keyslot_old, passphrase, passphrase_size, |
| &cd->u.luks1.hdr, &vk, cd); |
| else if (isLUKS2(cd->type)) { |
| r = LUKS2_keyslot_open(cd, keyslot_old, CRYPT_ANY_SEGMENT, passphrase, passphrase_size, &vk); |
| /* will fail for keyslots w/o digest. fix if supported in a future */ |
| if (r >= 0) { |
| digest = LUKS2_digest_by_keyslot(cd, &cd->u.luks2.hdr, r); |
| if (digest < 0) |
| r = -EINVAL; |
| } |
| } else |
| r = -EINVAL; |
| if (r < 0) |
| goto out; |
| |
| if (keyslot_old != CRYPT_ANY_SLOT && keyslot_old != r) { |
| log_dbg("Keyslot mismatch."); |
| goto out; |
| } |
| keyslot_old = r; |
| |
| if (keyslot_new == CRYPT_ANY_SLOT) { |
| if (isLUKS1(cd->type)) |
| keyslot_new = LUKS_keyslot_find_empty(&cd->u.luks1.hdr); |
| else if (isLUKS2(cd->type)) |
| keyslot_new = LUKS2_keyslot_find_empty(&cd->u.luks2.hdr, "luks2"); // FIXME |
| if (keyslot_new < 0) |
| keyslot_new = keyslot_old; |
| } |
| log_dbg("Key change, old slot %d, new slot %d.", keyslot_old, keyslot_new); |
| |
| if (isLUKS1(cd->type)) { |
| 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); |
| } else if (isLUKS2(cd->type)) { |
| r = LUKS2_get_keyslot_params(&cd->u.luks2.hdr, keyslot_old, ¶ms); |
| if (r) |
| goto out; |
| if (keyslot_old != keyslot_new) { |
| r = LUKS2_digest_assign(cd, &cd->u.luks2.hdr, keyslot_new, digest, 1, 0); |
| if (r < 0) |
| goto out; |
| } else { |
| log_dbg("Key slot %d is going to be overwritten.", keyslot_old); |
| /* FIXME: improve return code so that we can detect area is damaged */ |
| r = LUKS2_keyslot_wipe(cd, &cd->u.luks2.hdr, keyslot_old, 1); |
| if (r) { |
| /* (void)crypt_keyslot_destroy(cd, keyslot_old); */ |
| r = -EINVAL; |
| goto out; |
| } |
| } |
| |
| r = LUKS2_keyslot_store(cd, &cd->u.luks2.hdr, |
| keyslot_new, new_passphrase, |
| new_passphrase_size, vk, ¶ms); |
| } else |
| r = -EINVAL; |
| |
| if (r >= 0 && keyslot_old != keyslot_new) |
| r = crypt_keyslot_destroy(cd, keyslot_old); |
| |
| if (r < 0) |
| log_err(cd, _("Failed to swap new key slot.")); |
| out: |
| crypt_free_volume_key(vk); |
| if (r < 0) { |
| _luks2_reload(cd); |
| return r; |
| } |
| return keyslot_new; |
| } |
| |
| int crypt_keyslot_add_by_keyfile_device_offset(struct crypt_device *cd, |
| int keyslot, |
| const char *keyfile, |
| size_t keyfile_size, |
| uint64_t keyfile_offset, |
| const char *new_keyfile, |
| size_t new_keyfile_size, |
| uint64_t new_keyfile_offset) |
| { |
| int digest, r, active_slots; |
| size_t passwordLen, new_passwordLen; |
| struct luks2_keyslot_params params; |
| char *password = NULL, *new_password = NULL; |
| struct volume_key *vk = NULL; |
| |
| if (!keyfile || !new_keyfile) |
| return -EINVAL; |
| |
| log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.", |
| keyfile, new_keyfile); |
| |
| if ((r = onlyLUKS(cd))) |
| return r; |
| |
| r = keyslot_verify_or_find_empty(cd, &keyslot); |
| if (r) |
| return r; |
| |
| if (isLUKS1(cd->type)) |
| active_slots = LUKS_keyslot_active_count(&cd->u.luks1.hdr); |
| else |
| active_slots = LUKS2_keyslot_active_count(&cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT); |
| if (active_slots == 0) { |
| /* 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); |
| r = vk ? 0 : -ENOMEM; |
| } else { |
| log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.")); |
| return -EINVAL; |
| } |
| } else { |
| r = crypt_keyfile_device_read(cd, keyfile, |
| &password, &passwordLen, |
| keyfile_offset, keyfile_size, 0); |
| if (r < 0) |
| goto out; |
| |
| if (isLUKS1(cd->type)) |
| r = LUKS_open_key_with_hdr(CRYPT_ANY_SLOT, password, passwordLen, |
| &cd->u.luks1.hdr, &vk, cd); |
| else |
| r = LUKS2_keyslot_open(cd, CRYPT_ANY_SLOT, CRYPT_DEFAULT_SEGMENT, password, passwordLen, &vk); |
| } |
| |
| if (r < 0) |
| goto out; |
| |
| r = crypt_keyfile_device_read(cd, new_keyfile, |
| &new_password, &new_passwordLen, |
| new_keyfile_offset, new_keyfile_size, 0); |
| if (r < 0) |
| goto out; |
| |
| if (isLUKS1(cd->type)) |
| r = LUKS_set_key(keyslot, new_password, new_passwordLen, |
| &cd->u.luks1.hdr, vk, cd); |
| else { |
| r = LUKS2_digest_verify_by_segment(cd, &cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT, vk); |
| digest = r; |
| |
| if (r >= 0) |
| r = LUKS2_keyslot_params_default(cd, &cd->u.luks2.hdr, vk->keylength, ¶ms); |
| |
| if (r >= 0) |
| r = LUKS2_digest_assign(cd, &cd->u.luks2.hdr, keyslot, digest, 1, 0); |
| |
| if (r >= 0) |
| r = LUKS2_keyslot_store(cd, &cd->u.luks2.hdr, keyslot, |
| new_password, new_passwordLen, vk, ¶ms); |
| } |
| out: |
| crypt_safe_free(password); |
| crypt_safe_free(new_password); |
| crypt_free_volume_key(vk); |
| if (r < 0) { |
| _luks2_reload(cd); |
| return r; |
| } |
| return 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_device_offset(cd, keyslot, |
| keyfile, keyfile_size, 0, |
| new_keyfile, new_keyfile_size, 0); |
| } |
| |
| 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_offset) |
| { |
| return crypt_keyslot_add_by_keyfile_device_offset(cd, keyslot, |
| keyfile, keyfile_size, keyfile_offset, |
| new_keyfile, new_keyfile_size, new_keyfile_offset); |
| } |
| |
| int crypt_keyslot_add_by_volume_key(struct crypt_device *cd, |
| int keyslot, |
| const char *volume_key, |
| size_t volume_key_size, |
| const char *passphrase, |
| size_t passphrase_size) |
| { |
| struct volume_key *vk = NULL; |
| int r; |
| |
| if (!passphrase) |
| return -EINVAL; |
| |
| log_dbg("Adding new keyslot %d using volume key.", keyslot); |
| |
| if ((r = onlyLUKS(cd))) |
| return r; |
| |
| if (isLUKS2(cd->type)) |
| return crypt_keyslot_add_by_key(cd, keyslot, |
| volume_key, volume_key_size, passphrase, |
| passphrase_size, 0); |
| |
| r = keyslot_verify_or_find_empty(cd, &keyslot); |
| if (r < 0) |
| return r; |
| |
| if (volume_key) |
| vk = crypt_alloc_volume_key(volume_key_size, volume_key); |
| else if (cd->volume_key) |
| vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key); |
| |
| if (!vk) |
| return -ENOMEM; |
| |
| r = LUKS_verify_volume_key(&cd->u.luks1.hdr, vk); |
| if (r < 0) |
| log_err(cd, _("Volume key does not match the volume.")); |
| else |
| r = LUKS_set_key(keyslot, passphrase, passphrase_size, |
| &cd->u.luks1.hdr, vk, cd); |
| |
| crypt_free_volume_key(vk); |
| return (r < 0) ? r : keyslot; |
| } |
| |
| int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot) |
| { |
| crypt_keyslot_info ki; |
| int r; |
| |
| log_dbg("Destroying keyslot %d.", keyslot); |
| |
| if ((r = _onlyLUKS(cd, CRYPT_CD_UNRESTRICTED))) |
| return r; |
| |
| ki = crypt_keyslot_status(cd, keyslot); |
| if (ki == CRYPT_SLOT_INVALID) { |
| log_err(cd, _("Key slot %d is invalid."), keyslot); |
| return -EINVAL; |
| } |
| |
| if (isLUKS1(cd->type)) { |
| if (ki == CRYPT_SLOT_INACTIVE) { |
| log_err(cd, _("Key slot %d is not used."), keyslot); |
| return -EINVAL; |
| } |
| return LUKS_del_key(keyslot, &cd->u.luks1.hdr, cd); |
| } |
| |
| return LUKS2_keyslot_wipe(cd, &cd->u.luks2.hdr, keyslot, 0); |
| } |
| |
| static int _check_header_data_overlap(struct crypt_device *cd, const char *name) |
| { |
| if (!name || !isLUKS(cd->type)) |
| return 0; |
| |
| if (!device_is_identical(crypt_data_device(cd), crypt_metadata_device(cd))) |
| return 0; |
| |
| /* FIXME: check real header size */ |
| if (crypt_get_data_offset(cd) == 0) { |
| log_err(cd, _("Device header overlaps with data area.")); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Activation/deactivation of a device |
| */ |
| static int _activate_by_passphrase(struct crypt_device *cd, |
| const char *name, |
| int keyslot, |
| const char *passphrase, |
| size_t passphrase_size, |
| uint32_t flags) |
| { |
| int r; |
| struct volume_key *vk = NULL; |
| |
| if ((flags & CRYPT_ACTIVATE_KEYRING_KEY) && !crypt_use_keyring_for_vk(cd)) |
| return -EINVAL; |
| |
| if ((flags & CRYPT_ACTIVATE_ALLOW_UNBOUND_KEY) && name) |
| return -EINVAL; |
| |
| r = _check_header_data_overlap(cd, name); |
| if (r < 0) |
| return r; |
| |
| /* plain, use hashed passphrase */ |
| if (isPLAIN(cd->type)) { |
| if (!name) |
| return -EINVAL; |
| |
| 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->u.plain.hdr.size, flags); |
| keyslot = 0; |
| } else if (isLUKS1(cd->type)) { |
| r = LUKS_open_key_with_hdr(keyslot, passphrase, |
| passphrase_size, &cd->u.luks1.hdr, &vk, cd); |
| if (r >= 0) { |
| keyslot = r; |
| if (name) |
| r = LUKS1_activate(cd, name, vk, flags); |
| } |
| } else if (isLUKS2(cd->type)) { |
| r = LUKS2_keyslot_open(cd, keyslot, |
| (flags & CRYPT_ACTIVATE_ALLOW_UNBOUND_KEY) ? |
| CRYPT_ANY_SEGMENT : CRYPT_DEFAULT_SEGMENT, |
| passphrase, passphrase_size, &vk); |
| if (r >= 0) { |
| keyslot = r; |
| |
| if ((name || (flags & CRYPT_ACTIVATE_KEYRING_KEY)) && |
| crypt_use_keyring_for_vk(cd)) { |
| r = LUKS2_volume_key_load_in_keyring_by_keyslot(cd, |
| &cd->u.luks2.hdr, vk, keyslot); |
| if (r < 0) |
| goto out; |
| flags |= CRYPT_ACTIVATE_KEYRING_KEY; |
| } |
| |
| if (name) |
| r = LUKS2_activate(cd, name, vk, flags); |
| } |
| } else { |
| log_err(cd, _("Device type is not properly initialised.")); |
| r = -EINVAL; |
| } |
| out: |
| if (r < 0 && vk) |
| crypt_drop_keyring_key(cd, vk->key_description); |
| crypt_free_volume_key(vk); |
| |
| return r < 0 ? r : keyslot; |
| } |
| |
| static int _activate_loopaes(struct crypt_device *cd, |
| const char *name, |
| char *buffer, |
| size_t buffer_size, |
| uint32_t flags) |
| { |
| int r; |
| unsigned int key_count = 0; |
| struct volume_key *vk = NULL; |
| |
| r = LOOPAES_parse_keyfile(cd, &vk, cd->u.loopaes.hdr.hash, &key_count, |
| buffer, buffer_size); |
| |
| if (!r && name) |
| r = LOOPAES_activate(cd, name, cd->u.loopaes.cipher, key_count, |
| vk, flags); |
| |
| crypt_free_volume_key(vk); |
| |
| return r; |
| } |
| |
| static int _activate_check_status(struct crypt_device *cd, const char *name) |
| { |
| crypt_status_info ci; |
| |
| if (!name) |
| return 0; |
| |
| ci = crypt_status(cd, name); |
| if (ci == CRYPT_INVALID) { |
| log_err(cd, _("Cannot use device %s, name is invalid or still in use."), name); |
| return -EINVAL; |
| } else if (ci >= CRYPT_ACTIVE) { |
| log_err(cd, _("Device %s already exists."), name); |
| return -EEXIST; |
| } |
| |
| return 0; |
| } |
| |
| // activation/deactivation of device mapping |
| int crypt_activate_by_passphrase(struct crypt_device *cd, |
| const char *name, |
| int keyslot, |
| const char *passphrase, |
| size_t passphrase_size, |
| uint32_t flags) |
| { |
| int r; |
| |
| if (!cd || !passphrase) |
| return -EINVAL; |
| |
| log_dbg("%s volume %s [keyslot %d] using passphrase.", |
| name ? "Activating" : "Checking", name ?: "passphrase", |
| keyslot); |
| |
| r = _activate_check_status(cd, name); |
| if (r < 0) |
| return r; |
| |
| return _activate_by_passphrase(cd, name, keyslot, passphrase, passphrase_size, flags); |
| } |
| |
| int crypt_activate_by_keyfile_device_offset(struct crypt_device *cd, |
| const char *name, |
| int keyslot, |
| const char *keyfile, |
| size_t keyfile_size, |
| uint64_t keyfile_offset, |
| uint32_t flags) |
| { |
| char *passphrase_read = NULL; |
| size_t passphrase_size_read; |
| int r; |
| |
| if (!cd || !keyfile || |
| ((flags & CRYPT_ACTIVATE_KEYRING_KEY) && !crypt_use_keyring_for_vk(cd))) |
| return -EINVAL; |
| |
| log_dbg("%s volume %s [keyslot %d] using keyfile %s.", |
| name ? "Activating" : "Checking", name ?: "passphrase", keyslot, keyfile); |
| |
| r = _activate_check_status(cd, name); |
| if (r < 0) |
| return r; |
| |
| r = crypt_keyfile_device_read(cd, keyfile, |
| &passphrase_read, &passphrase_size_read, |
| keyfile_offset, keyfile_size, 0); |
| if (r < 0) |
| goto out; |
| |
| if (isLOOPAES(cd->type)) |
| r = _activate_loopaes(cd, name, passphrase_read, passphrase_size_read, flags); |
| else |
| r = _activate_by_passphrase(cd, name, keyslot, passphrase_read, passphrase_size_read, flags); |
| |
| out: |
| crypt_safe_free(passphrase_read); |
| 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_device_offset(cd, name, keyslot, keyfile, |
| keyfile_size, 0, flags); |
| } |
| |
| 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) |
| { |
| return crypt_activate_by_keyfile_device_offset(cd, name, keyslot, keyfile, |
| keyfile_size, keyfile_offset, flags); |
| } |
| |
| int crypt_activate_by_volume_key(struct crypt_device *cd, |
| const char *name, |
| const char *volume_key, |
| size_t volume_key_size, |
| uint32_t flags) |
| { |
| struct volume_key *vk = NULL; |
| int r; |
| |
| if (!cd || |
| ((flags & CRYPT_ACTIVATE_KEYRING_KEY) && !crypt_use_keyring_for_vk(cd))) |
| return -EINVAL; |
| |
| log_dbg("%s volume %s by volume key.", name ? "Activating" : "Checking", |
| name ?: ""); |
| |
| r = _activate_check_status(cd, name); |
| if (r < 0) |
| return r; |
| |
| r = _check_header_data_overlap(cd, name); |
| if (r < 0) |
| return r; |
| |
| /* use key directly, no hash */ |
| if (isPLAIN(cd->type)) { |
| if (!name) |
| return -EINVAL; |
| |
| if (!volume_key || !volume_key_size || volume_key_size != cd->u.plain.key_size) { |
| log_err(cd, _("Incorrect volume key specified for plain device.")); |
| return -EINVAL; |
| } |
| |
| vk = crypt_alloc_volume_key(volume_key_size, volume_key); |
| if (!vk) |
| return -ENOMEM; |
| |
| r = PLAIN_activate(cd, name, vk, cd->u.plain.hdr.size, flags); |
| } else if (isLUKS1(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.")); |
| 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->u.luks1.hdr, vk); |
| |
| if (r == -EPERM) |
| log_err(cd, _("Volume key does not match the volume.")); |
| |
| if (!r && name) |
| r = LUKS1_activate(cd, name, vk, flags); |
| } else if (isLUKS2(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.")); |
| 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 = LUKS2_digest_verify_by_segment(cd, &cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT, vk); |
| if (r == -EPERM || r == -ENOENT) |
| log_err(cd, _("Volume key does not match the volume.")); |
| if (r > 0) |
| r = 0; |
| |
| if (!r && (name || (flags & CRYPT_ACTIVATE_KEYRING_KEY)) && |
| crypt_use_keyring_for_vk(cd)) { |
| r = LUKS2_key_description_by_segment(cd, |
| &cd->u.luks2.hdr, vk, CRYPT_DEFAULT_SEGMENT); |
| if (!r) |
| r = crypt_volume_key_load_in_keyring(cd, vk); |
| if (!r) |
| flags |= CRYPT_ACTIVATE_KEYRING_KEY; |
| } |
| |
| if (!r && name) |
| r = LUKS2_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.")); |
| return -EINVAL; |
| } |
| |
| r = VERITY_activate(cd, name, volume_key, volume_key_size, cd->u.verity.fec_device, |
| &cd->u.verity.hdr, flags|CRYPT_ACTIVATE_READONLY); |
| |
| if (r == -EPERM) { |
| free(cd->u.verity.root_hash); |
| cd->u.verity.root_hash = NULL; |
| } if (!r) { |
| 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 if (isINTEGRITY(cd->type)) { |
| if (!name) |
| return 0; |
| if (volume_key) { |
| vk = crypt_alloc_volume_key(volume_key_size, volume_key); |
| if (!vk) |
| return -ENOMEM; |
| } |
| r = INTEGRITY_activate(cd, name, &cd->u.integrity.params, vk, |
| cd->u.integrity.journal_crypt_key, |
| cd->u.integrity.journal_mac_key, flags); |
| } else { |
| log_err(cd, _("Device type is not properly initialised.")); |
| r = -EINVAL; |
| } |
| |
| if (r < 0 && vk) |
| crypt_drop_keyring_key(cd, vk->key_description); |
| crypt_free_volume_key(vk); |
| |
| return r; |
| } |
| |
| int crypt_deactivate_by_name(struct crypt_device *cd, const char *name, uint32_t flags) |
| { |
| char *key_desc; |
| struct crypt_device *fake_cd = NULL; |
| const char *namei = NULL; |
| struct crypt_dm_active_device dmd = {}; |
| int r; |
| uint32_t get_flags = DM_ACTIVE_DEVICE | DM_ACTIVE_HOLDERS; |
| |
| if (!name) |
| return -EINVAL; |
| |
| log_dbg("Deactivating volume %s.", name); |
| |
| if (!cd) { |
| r = crypt_init_by_name(&fake_cd, name); |
| if (r < 0) |
| return r; |
| cd = fake_cd; |
| } |
| |
| /* skip holders detection and early abort when some flags raised */ |
| if (flags & (CRYPT_DEACTIVATE_FORCE | CRYPT_DEACTIVATE_DEFERRED)) |
| get_flags &= ~DM_ACTIVE_HOLDERS; |
| |
| switch (crypt_status(cd, name)) { |
| case CRYPT_ACTIVE: |
| case CRYPT_BUSY: |
| r = dm_query_device(cd, name, get_flags, &dmd); |
| if (r >= 0) { |
| if (dmd.holders) { |
| log_err(cd, _("Device %s is still in use."), name); |
| r = -EBUSY; |
| break; |
| } |
| if (isLUKS2(cd->type) && crypt_get_integrity_tag_size(cd)) |
| namei = device_dm_name(dmd.data_device); |
| } |
| |
| key_desc = crypt_get_device_key_description(name); |
| |
| if (isTCRYPT(cd->type)) |
| r = TCRYPT_deactivate(cd, name, flags); |
| else |
| r = dm_remove_device(cd, name, flags); |
| if (r < 0 && crypt_status(cd, name) == CRYPT_BUSY) { |
| log_err(cd, _("Device %s is still in use."), name); |
| r = -EBUSY; |
| } else if (namei) { |
| log_dbg("Deactivating integrity device %s.", namei); |
| r = dm_remove_device(cd, namei, 0); |
| } |
| if (!r) |
| crypt_drop_keyring_key(cd, key_desc); |
| free(key_desc); |
| break; |
| case CRYPT_INACTIVE: |
| log_err(cd, _("Device %s is not active."), name); |
| r = -ENODEV; |
| break; |
| default: |
| log_err(cd, _("Invalid device %s."), name); |
| r = -EINVAL; |
| } |
| |
| device_free(dmd.data_device); |
| crypt_free(fake_cd); |
| |
| return r; |
| } |
| |
| int crypt_deactivate(struct crypt_device *cd, const char *name) |
| { |
| return crypt_deactivate_by_name(cd, name, 0); |
| } |
| |
| 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; |
| |
| if (!cd || !name || !cad) |
| return -EINVAL; |
| |
| r = dm_query_device(cd, name, 0, &dmd); |
| if (r < 0) |
| return r; |
| |
| if (dmd.target != DM_CRYPT && |
| dmd.target != DM_VERITY && |
| dmd.target != DM_INTEGRITY) |
| return -ENOTSUP; |
| |
| 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 if (dmd.target == DM_CRYPT) { |
| cad->offset = dmd.u.crypt.offset; |
| cad->iv_offset = dmd.u.crypt.iv_offset; |
| } |
| cad->size = dmd.size; |
| cad->flags = dmd.flags; |
| |
| return 0; |
| } |
| |
| uint64_t crypt_get_active_integrity_failures(struct crypt_device *cd, const char *name) |
| { |
| struct crypt_dm_active_device dmd; |
| uint64_t failures = 0; |
| |
| if (!name) |
| return 0; |
| |
| /* FIXME: LUKS2 / dm-crypt does not provide this count. */ |
| if (dm_query_device(cd, name, 0, &dmd) < 0) |
| return 0; |
| |
| if (dmd.target == DM_INTEGRITY && |
| !dm_status_integrity_failures(cd, name, &failures)) |
| return failures; |
| |
| return 0; |
| } |
| |
| /* |
| * Volume key handling |
| */ |
| int crypt_volume_key_get(struct crypt_device *cd, |
| int keyslot, |
| char *volume_key, |
| size_t *volume_key_size, |
| const char *passphrase, |
| size_t passphrase_size) |
| { |
| struct volume_key *vk = NULL; |
| int key_len, r = -EINVAL; |
| |
| if (!cd || !volume_key || !volume_key_size || (!isTCRYPT(cd->type) && !passphrase)) |
| return -EINVAL; |
| |
| /* wrapped keys or unbound keys may be exported */ |
| if (crypt_fips_mode() && !crypt_cipher_wrapped_key(crypt_get_cipher(cd))) { |
| if (!isLUKS2(cd->type) || keyslot == CRYPT_ANY_SLOT || |
| !LUKS2_keyslot_for_segment(&cd->u.luks2.hdr, keyslot, CRYPT_DEFAULT_SEGMENT)) { |
| log_err(cd, _("Function not available in FIPS mode.")); |
| return -EACCES; |
| } |
| } |
| |
| if (isLUKS2(cd->type) && keyslot != CRYPT_ANY_SLOT) |
| key_len = LUKS2_get_keyslot_key_size(&cd->u.luks2.hdr, keyslot); |
| else |
| key_len = crypt_get_volume_key_size(cd); |
| |
| if (key_len < 0) |
| return -EINVAL; |
| |
| if (key_len > (int)*volume_key_size) { |
| log_err(cd, _("Volume key buffer too small.")); |
| return -ENOMEM; |
| } |
| |
| 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.")); |
| } else if (isLUKS1(cd->type)) { |
| r = LUKS_open_key_with_hdr(keyslot, passphrase, |
| passphrase_size, &cd->u.luks1.hdr, &vk, cd); |
| } else if (isLUKS2(cd->type)) { |
| r = LUKS2_keyslot_open(cd, keyslot, |
| keyslot == CRYPT_ANY_SLOT ? CRYPT_DEFAULT_SEGMENT : CRYPT_ANY_SEGMENT, |
| passphrase, passphrase_size, &vk); |
| } 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."), cd->type ?: "(none)"); |
| |
| if (r >= 0) { |
| memcpy(volume_key, vk->key, vk->keylength); |
| *volume_key_size = vk->keylength; |
| } |
| |
| crypt_free_volume_key(vk); |
| return r; |
| } |
| |
| int crypt_volume_key_verify(struct crypt_device *cd, |
| const char *volume_key, |
| size_t volume_key_size) |
| { |
| struct volume_key *vk; |
| int r; |
| |
| if ((r = _onlyLUKS(cd, CRYPT_CD_UNRESTRICTED))) |
| return r; |
| |
| vk = crypt_alloc_volume_key(volume_key_size, volume_key); |
| if (!vk) |
| return -ENOMEM; |
| |
| if (isLUKS1(cd->type)) |
| r = LUKS_verify_volume_key(&cd->u.luks1.hdr, vk); |
| else if (isLUKS2(cd->type)) |
| r = LUKS2_digest_verify_by_segment(cd, &cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT, vk); |
| |
| if (r == -EPERM) |
| log_err(cd, _("Volume key does not match the volume.")); |
| |
| crypt_free_volume_key(vk); |
| |
| return r >= 0 ? 0 : r; |
| } |
| |
| /* |
| * RNG and memory locking |
| */ |
| void crypt_set_rng_type(struct crypt_device *cd, int rng_type) |
| { |
| if (!cd) |
| return; |
| |
| switch (rng_type) { |
| case CRYPT_RNG_URANDOM: |
| case CRYPT_RNG_RANDOM: |
| log_dbg("RNG set to %d (%s).", rng_type, rng_type ? "random" : "urandom"); |
| cd->rng_type = rng_type; |
| } |
| } |
| |
| int crypt_get_rng_type(struct crypt_device *cd) |
| { |
| if (!cd) |
| return -EINVAL; |
| |
| return cd->rng_type; |
| } |
| |
| int crypt_memory_lock(struct crypt_device *cd, int lock) |
| { |
| return lock ? crypt_memlock_inc(cd) : crypt_memlock_dec(cd); |
| } |
| |
| /* |
| * Reporting |
| */ |
| crypt_status_info crypt_status(struct crypt_device *cd, const char *name) |
| { |
| int r; |
| |
| if (!name) |
| return CRYPT_INVALID; |
| |
| if (!cd) |
| dm_backend_init(); |
| |
| r = dm_status_device(cd, name); |
| |
| if (!cd) |
| dm_backend_exit(); |
| |
| if (r < 0 && r != -ENODEV) |
| return CRYPT_INVALID; |
| |
| if (r == 0) |
| return CRYPT_ACTIVE; |
| |
| if (r > 0) |
| return CRYPT_BUSY; |
| |
| return CRYPT_INACTIVE; |
| } |
| |
| 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%s", (const char)d[i], sep); |
| } |
| |
| static int _luks_dump(struct crypt_device *cd) |
| { |
| int i; |
| |
| log_std(cd, "LUKS header information for %s\n\n", mdata_device_path(cd)); |
| log_std(cd, "Version: \t%" PRIu16 "\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%" PRIu32 "\n", cd->u.luks1.hdr.payloadOffset); |
| log_std(cd, "MK bits: \t%" PRIu32 "\n", cd->u.luks1.hdr.keyBytes * 8); |
| log_std(cd, "MK digest: \t"); |
| hexprint(cd, cd->u.luks1.hdr.mkDigest, LUKS_DIGESTSIZE, " "); |
| log_std(cd, "\n"); |
| log_std(cd, "MK salt: \t"); |
| hexprint(cd, cd->u.luks1.hdr.mkDigestSalt, LUKS_SALTSIZE/2, " "); |
| log_std(cd, "\n \t"); |
| hexprint(cd, cd->u.luks1.hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2, " "); |
| log_std(cd, "\n"); |
| log_std(cd, "MK iterations: \t%" PRIu32 "\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->u.luks1.hdr.keyblock[i].active == LUKS_KEY_ENABLED) { |
| log_std(cd, "Key Slot %d: ENABLED\n",i); |
| log_std(cd, "\tIterations: \t%" PRIu32 "\n", |
| cd->u.luks1.hdr.keyblock[i].passwordIterations); |
| log_std(cd, "\tSalt: \t"); |
| hexprint(cd, cd->u.luks1.hdr.keyblock[i].passwordSalt, |
| LUKS_SALTSIZE/2, " "); |
| log_std(cd, "\n\t \t"); |
| 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%" PRIu32 "\n", |
| cd->u.luks1.hdr.keyblock[i].keyMaterialOffset); |
| log_std(cd, "\tAF stripes: \t%" PRIu32 "\n", |
| cd->u.luks1.hdr.keyblock[i].stripes); |
| } |
| 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->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->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->u.verity.root_hash) { |
| log_std(cd, "Root hash: \t"); |
| hexprint(cd, cd->u.verity.root_hash, cd->u.verity.root_hash_size, ""); |
| log_std(cd, "\n"); |
| } |
| return 0; |
| } |
| |
| int crypt_dump(struct crypt_device *cd) |
| { |
| if (!cd) |
| return -EINVAL; |
| if (isLUKS1(cd->type)) |
| return _luks_dump(cd); |
| else if (isLUKS2(cd->type)) |
| return LUKS2_hdr_dump(cd, &cd->u.luks2.hdr); |
| 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); |
| else if (isINTEGRITY(cd->type)) |
| return INTEGRITY_dump(cd, crypt_data_device(cd), 0); |
| |
| log_err(cd, _("Dump operation is not supported for this device type.")); |
| return -EINVAL; |
| } |
| |
| const char *crypt_get_cipher(struct crypt_device *cd) |
| { |
| if (!cd) |
| return NULL; |
| |
| if (isPLAIN(cd->type)) |
| return cd->u.plain.cipher; |
| |
| if (isLUKS1(cd->type)) |
| return cd->u.luks1.hdr.cipherName; |
| |
| if (isLUKS2(cd->type)) |
| return cd->u.luks2.cipher; |
| |
| if (isLOOPAES(cd->type)) |
| return cd->u.loopaes.cipher; |
| |
| if (isTCRYPT(cd->type)) |
| return cd->u.tcrypt.params.cipher; |
| |
| if (!cd->type && !_init_by_name_crypt_none(cd)) |
| return cd->u.none.cipher; |
| |
| return NULL; |
| } |
| |
| const char *crypt_get_cipher_mode(struct crypt_device *cd) |
| { |
| if (!cd) |
| return NULL; |
| |
| if (isPLAIN(cd->type)) |
| return cd->u.plain.cipher_mode; |
| |
| if (isLUKS1(cd->type)) |
| return cd->u.luks1.hdr.cipherMode; |
| |
| if (isLUKS2(cd->type)) |
| return cd->u.luks2.cipher_mode; |
| |
| if (isLOOPAES(cd->type)) |
| return cd->u.loopaes.cipher_mode; |
| |
| if (isTCRYPT(cd->type)) |
| return cd->u.tcrypt.params.mode; |
| |
| if (!cd->type && !_init_by_name_crypt_none(cd)) |
| return cd->u.none.cipher_mode; |
| |
| return NULL; |
| } |
| |
| /* INTERNAL only */ |
| const char *crypt_get_integrity(struct crypt_device *cd) |
| { |
| if (isINTEGRITY(cd->type)) |
| return cd->u.integrity.params.integrity; |
| |
| if (isLUKS2(cd->type)) |
| return LUKS2_get_integrity(&cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT); |
| |
| return NULL; |
| } |
| |
| /* INTERNAL only */ |
| int crypt_get_integrity_key_size(struct crypt_device *cd) |
| { |
| if (isINTEGRITY(cd->type)) |
| return INTEGRITY_key_size(cd, crypt_get_integrity(cd)); |
| |
| if (isLUKS2(cd->type)) |
| return INTEGRITY_key_size(cd, crypt_get_integrity(cd)); |
| |
| return 0; |
| } |
| |
| /* INTERNAL only */ |
| int crypt_get_integrity_tag_size(struct crypt_device *cd) |
| { |
| if (isINTEGRITY(cd->type)) |
| return cd->u.integrity.params.tag_size; |
| |
| if (isLUKS2(cd->type)) |
| return INTEGRITY_tag_size(cd, crypt_get_integrity(cd), |
| crypt_get_cipher(cd), |
| crypt_get_cipher_mode(cd)); |
| return 0; |
| } |
| |
| int crypt_get_sector_size(struct crypt_device *cd) |
| { |
| if (!cd) |
| return SECTOR_SIZE; |
| |
| if (isPLAIN(cd->type)) |
| return cd->u.plain.hdr.sector_size; |
| |
| if (isINTEGRITY(cd->type)) |
| return cd->u.integrity.params.sector_size; |
| |
| if (isLUKS2(cd->type)) |
| return LUKS2_get_sector_size(&cd->u.luks2.hdr); |
| |
| return SECTOR_SIZE; |
| } |
| |
| const char *crypt_get_uuid(struct crypt_device *cd) |
| { |
| if (!cd) |
| return NULL; |
| |
| if (isLUKS1(cd->type)) |
| return cd->u.luks1.hdr.uuid; |
| |
| if (isLUKS2(cd->type)) |
| return cd->u.luks2.hdr.uuid; |
| |
| if (isVERITY(cd->type)) |
| return cd->u.verity.uuid; |
| |
| return NULL; |
| } |
| |
| const char *crypt_get_device_name(struct crypt_device *cd) |
| { |
| const char *path; |
| |
| if (!cd) |
| return NULL; |
| |
| 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) |
| { |
| int r; |
| |
| if (!cd) |
| return 0; |
| |
| if (isPLAIN(cd->type)) |
| return cd->u.plain.key_size; |
| |
| if (isLUKS1(cd->type)) |
| return cd->u.luks1.hdr.keyBytes; |
| |
| if (isLUKS2(cd->type)) { |
| r = LUKS2_get_volume_key_size(&cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT); |
| if (r < 0 && cd->volume_key) |
| r = cd->volume_key->keylength; |
| return r < 0 ? 0 : r; |
| } |
| |
| if (isLOOPAES(cd->type)) |
| return cd->u.loopaes.key_size; |
| |
| if (isVERITY(cd->type)) |
| return cd->u.verity.root_hash_size; |
| |
| if (isTCRYPT(cd->type)) |
| return cd->u.tcrypt.params.key_size; |
| |
| if (!cd->type && !_init_by_name_crypt_none(cd)) |
| return cd->u.none.key_size; |
| |
| return 0; |
| } |
| |
| int crypt_keyslot_get_key_size(struct crypt_device *cd, int keyslot) |
| { |
| if (!cd || !isLUKS(cd->type)) |
| return -EINVAL; |
| |
| if (keyslot < 0 || keyslot >= crypt_keyslot_max(cd->type)) |
| return -EINVAL; |
| |
| if (isLUKS1(cd->type)) |
| return cd->u.luks1.hdr.keyBytes; |
| |
| if (isLUKS2(cd->type)) |
| return LUKS2_get_keyslot_key_size(&cd->u.luks2.hdr, keyslot); |
| |
| return -EINVAL; |
| } |
| |
| uint64_t crypt_get_data_offset(struct crypt_device *cd) |
| { |
| if (!cd) |
| return 0; |
| |
| if (isPLAIN(cd->type)) |
| return cd->u.plain.hdr.offset; |
| |
| if (isLUKS1(cd->type)) |
| return cd->u.luks1.hdr.payloadOffset; |
| |
| if (isLUKS2(cd->type)) |
| return LUKS2_get_data_offset(&cd->u.luks2.hdr); |
| |
| if (isLOOPAES(cd->type)) |
| 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; |
| } |
| |
| uint64_t crypt_get_iv_offset(struct crypt_device *cd) |
| { |
| if (!cd) |
| return 0; |
| |
| if (isPLAIN(cd->type)) |
| return cd->u.plain.hdr.skip; |
| |
| if (isLOOPAES(cd->type)) |
| 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; |
| } |
| |
| crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot) |
| { |
| if (_onlyLUKS(cd, CRYPT_CD_QUIET | CRYPT_CD_UNRESTRICTED) < 0) |
| return CRYPT_SLOT_INVALID; |
| |
| if (isLUKS1(cd->type)) |
| return LUKS_keyslot_info(&cd->u.luks1.hdr, keyslot); |
| else if(isLUKS2(cd->type)) |
| return LUKS2_keyslot_info(&cd->u.luks2.hdr, keyslot); |
| |
| return CRYPT_SLOT_INVALID; |
| } |
| |
| int crypt_keyslot_max(const char *type) |
| { |
| if (type && isLUKS1(type)) |
| return LUKS_NUMKEYS; |
| |
| if (type && isLUKS2(type)) |
| return LUKS2_KEYSLOTS_MAX; |
| |
| return -EINVAL; |
| } |
| |
| int crypt_keyslot_area(struct crypt_device *cd, |
| int keyslot, |
| uint64_t *offset, |
| uint64_t *length) |
| { |
| if (_onlyLUKS(cd, CRYPT_CD_QUIET | CRYPT_CD_UNRESTRICTED) || !offset || !length) |
| return -EINVAL; |
| |
| if (isLUKS2(cd->type)) |
| return LUKS2_keyslot_area(&cd->u.luks2.hdr, keyslot, offset, length); |
| |
| return LUKS_keyslot_area(&cd->u.luks1.hdr, keyslot, offset, length); |
| } |
| |
| crypt_keyslot_priority crypt_keyslot_get_priority(struct crypt_device *cd, int keyslot) |
| { |
| if (_onlyLUKS(cd, CRYPT_CD_QUIET | CRYPT_CD_UNRESTRICTED)) |
| return CRYPT_SLOT_PRIORITY_INVALID; |
| |
| if (keyslot < 0 || keyslot >= crypt_keyslot_max(cd->type)) |
| return CRYPT_SLOT_PRIORITY_INVALID; |
| |
| if (isLUKS2(cd->type)) |
| return LUKS2_keyslot_priority_get(cd, &cd->u.luks2.hdr, keyslot); |
| |
| return CRYPT_SLOT_PRIORITY_NORMAL; |
| } |
| |
| int crypt_keyslot_set_priority(struct crypt_device *cd, int keyslot, crypt_keyslot_priority priority) |
| { |
| int r; |
| |
| log_dbg("Setting keyslot %d to priority %d.", keyslot, priority); |
| |
| if (priority == CRYPT_SLOT_PRIORITY_INVALID) |
| return -EINVAL; |
| |
| if (keyslot < 0 || keyslot >= crypt_keyslot_max(cd->type)) |
| return -EINVAL; |
| |
| if ((r = onlyLUKS2(cd))) |
| return r; |
| |
| return LUKS2_keyslot_priority_set(cd, &cd->u.luks2.hdr, keyslot, priority, 1); |
| } |
| |
| const char *crypt_get_type(struct crypt_device *cd) |
| { |
| return cd ? cd->type : NULL; |
| } |
| |
| int crypt_get_verity_info(struct crypt_device *cd, |
| struct crypt_params_verity *vp) |
| { |
| if (!cd || !isVERITY(cd->type) || !vp) |
| return -EINVAL; |
| |
| vp->data_device = device_path(cd->device); |
| vp->hash_device = mdata_device_path(cd); |
| vp->fec_device = device_path(cd->u.verity.fec_device); |
| vp->fec_area_offset = cd->u.verity.hdr.fec_area_offset; |
| vp->fec_roots = cd->u.verity.hdr.fec_roots; |
| 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_integrity_info(struct crypt_device *cd, |
| struct crypt_params_integrity *ip) |
| { |
| if (!cd || !ip) |
| return -EINVAL; |
| |
| if (isINTEGRITY(cd->type)) { |
| ip->journal_size = cd->u.integrity.params.journal_size; |
| ip->journal_watermark = cd->u.integrity.params.journal_watermark; |
| ip->journal_commit_time = cd->u.integrity.params.journal_commit_time; |
| ip->interleave_sectors = cd->u.integrity.params.interleave_sectors; |
| ip->tag_size = cd->u.integrity.params.tag_size; |
| ip->sector_size = cd->u.integrity.params.sector_size; |
| ip->buffer_sectors = cd->u.integrity.params.buffer_sectors; |
| |
| ip->integrity = cd->u.integrity.params.integrity; |
| ip->integrity_key_size = crypt_get_integrity_key_size(cd); |
| |
| ip->journal_integrity = cd->u.integrity.params.journal_integrity; |
| ip->journal_integrity_key_size = cd->u.integrity.params.journal_integrity_key_size; |
| ip->journal_integrity_key = NULL; |
| |
| ip->journal_crypt = cd->u.integrity.params.journal_crypt; |
| ip->journal_crypt_key_size = cd->u.integrity.params.journal_crypt_key_size; |
| ip->journal_crypt_key = NULL; |
| return 0; |
| } else if (isLUKS2(cd->type)) { |
| ip->journal_size = 0; // FIXME |
| ip->journal_watermark = 0; // FIXME |
| ip->journal_commit_time = 0; // FIXME |
| ip->interleave_sectors = 0; // FIXME |
| ip->sector_size = crypt_get_sector_size(cd); |
| ip->buffer_sectors = 0; // FIXME |
| |
| ip->integrity = LUKS2_get_integrity(&cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT); |
| ip->integrity_key_size = crypt_get_integrity_key_size(cd); |
| ip->tag_size = INTEGRITY_tag_size(cd, ip->integrity, crypt_get_cipher(cd), crypt_get_cipher_mode(cd)); |
| |
| ip->journal_integrity = NULL; |
| ip->journal_integrity_key_size = 0; |
| ip->journal_integrity_key = NULL; |
| |
| ip->journal_crypt = NULL; |
| ip->journal_crypt_key_size = 0; |
| ip->journal_crypt_key = NULL; |
| return 0; |
| } |
| |
| return -ENOTSUP; |
| } |
| |
| int crypt_convert(struct crypt_device *cd, |
| const char *type, |
| void *params) |
| { |
| struct luks_phdr hdr1; |
| struct luks2_hdr hdr2; |
| int r; |
| |
| if (!type) |
| return -EINVAL; |
| |
| log_dbg("Converting LUKS device to type %s", type); |
| |
| if ((r = onlyLUKS(cd))) |
| return r; |
| |
| if (isLUKS1(cd->type) && isLUKS2(type)) |
| r = LUKS2_luks1_to_luks2(cd, &cd->u.luks1.hdr, &hdr2); |
| else if (isLUKS2(cd->type) && isLUKS1(type)) |
| r = LUKS2_luks2_to_luks1(cd, &cd->u.luks2.hdr, &hdr1); |
| else |
| return -EINVAL; |
| |
| if (r < 0) { |
| /* in-memory header may be invalid after failed conversion */ |
| _luks2_reload(cd); |
| if (r == -EBUSY) |
| log_err(cd, _("Cannot convert device %s which is still in use."), mdata_device_path(cd)); |
| return r; |
| } |
| |
| crypt_free_type(cd); |
| |
| return crypt_load(cd, type, params); |
| } |
| |
| /* Internal access function to header pointer */ |
| void *crypt_get_hdr(struct crypt_device *cd, const char *type) |
| { |
| /* If requested type differs, ignore it */ |
| if (strcmp(cd->type, type)) |
| return NULL; |
| |
| if (isPLAIN(cd->type)) |
| return &cd->u.plain; |
| |
| if (isLUKS1(cd->type)) |
| return &cd->u.luks1.hdr; |
| |
| if (isLUKS2(cd->type)) |
| return &cd->u.luks2.hdr; |
| |
| if (isLOOPAES(cd->type)) |
| return &cd->u.loopaes; |
| |
| if (isVERITY(cd->type)) |
| return &cd->u.verity; |
| |
| if (isTCRYPT(cd->type)) |
| return &cd->u.tcrypt; |
| |
| return NULL; |
| } |
| |
| /* |
| * Token handling |
| */ |
| int crypt_activate_by_token(struct crypt_device *cd, |
| const char *name, int token, void *usrptr, uint32_t flags) |
| { |
| int r; |
| |
| log_dbg("%s volume %s using token %d.", |
| name ? "Activating" : "Checking", name ?: "passphrase", token); |
| |
| if ((r = _onlyLUKS2(cd, CRYPT_CD_QUIET | CRYPT_CD_UNRESTRICTED))) |
| return r; |
| |
| if ((flags & CRYPT_ACTIVATE_KEYRING_KEY) && !crypt_use_keyring_for_vk(cd)) |
| return -EINVAL; |
| |
| if ((flags & CRYPT_ACTIVATE_ALLOW_UNBOUND_KEY) && name) |
| return -EINVAL; |
| |
| if (token == CRYPT_ANY_TOKEN) |
| return LUKS2_token_open_and_activate_any(cd, &cd->u.luks2.hdr, name, flags); |
| |
| return LUKS2_token_open_and_activate(cd, &cd->u.luks2.hdr, token, name, flags, usrptr); |
| } |
| |
| int crypt_token_json_get(struct crypt_device *cd, int token, const char **json) |
| { |
| int r; |
| |
| if (!json) |
| return -EINVAL; |
| |
| log_dbg("Requesting JSON for token %d.", token); |
| |
| if ((r = _onlyLUKS2(cd, CRYPT_CD_UNRESTRICTED))) |
| return r; |
| |
| return LUKS2_token_json_get(cd, &cd->u.luks2.hdr, token, json) ?: token; |
| } |
| |
| int crypt_token_json_set(struct crypt_device *cd, int token, const char *json) |
| { |
| int r; |
| |
| log_dbg("Updating JSON for token %d.", token); |
| |
| if ((r = onlyLUKS2(cd))) |
| return r; |
| |
| return LUKS2_token_create(cd, &cd->u.luks2.hdr, token, json, 1); |
| } |
| |
| crypt_token_info crypt_token_status(struct crypt_device *cd, int token, const char **type) |
| { |
| if (_onlyLUKS2(cd, CRYPT_CD_QUIET | CRYPT_CD_UNRESTRICTED)) |
| return CRYPT_TOKEN_INVALID; |
| |
| return LUKS2_token_status(cd, &cd->u.luks2.hdr, token, type); |
| } |
| |
| int crypt_token_luks2_keyring_get(struct crypt_device *cd, |
| int token, |
| struct crypt_token_params_luks2_keyring *params) |
| { |
| crypt_token_info token_info; |
| const char *type; |
| int r; |
| |
| if (!params) |
| return -EINVAL; |
| |
| log_dbg("Requesting LUKS2 keyring token %d.", token); |
| |
| if ((r = _onlyLUKS2(cd, CRYPT_CD_UNRESTRICTED))) |
| return r; |
| |
| token_info = LUKS2_token_status(cd, &cd->u.luks2.hdr, token, &type); |
| switch (token_info) { |
| case CRYPT_TOKEN_INVALID: |
| log_dbg("Token %d is invalid.", token); |
| return -EINVAL; |
| case CRYPT_TOKEN_INACTIVE: |
| log_dbg("Token %d is inactive.", token); |
| return -EINVAL; |
| case CRYPT_TOKEN_INTERNAL: |
| if (!strcmp(type, LUKS2_TOKEN_KEYRING)) |
| break; |
| /* Fall through */ |
| case CRYPT_TOKEN_INTERNAL_UNKNOWN: |
| case CRYPT_TOKEN_EXTERNAL: |
| case CRYPT_TOKEN_EXTERNAL_UNKNOWN: |
| log_dbg("Token %d has unexpected type %s.", token, type); |
| return -EINVAL; |
| } |
| |
| return LUKS2_builtin_token_get(cd, &cd->u.luks2.hdr, token, LUKS2_TOKEN_KEYRING, params); |
| } |
| |
| int crypt_token_luks2_keyring_set(struct crypt_device *cd, |
| int token, |
| const struct crypt_token_params_luks2_keyring *params) |
| { |
| int r; |
| |
| if (!params) |
| return -EINVAL; |
| |
| log_dbg("Creating new LUKS2 keyring token (%d).", token); |
| |
| if ((r = onlyLUKS2(cd))) |
| return r; |
| |
| return LUKS2_builtin_token_create(cd, &cd->u.luks2.hdr, token, LUKS2_TOKEN_KEYRING, params, 1); |
| } |
| |
| int crypt_token_assign_keyslot(struct crypt_device *cd, int token, int keyslot) |
| { |
| int r; |
| |
| if ((r = onlyLUKS2(cd))) |
| return r; |
| |
| return LUKS2_token_assign(cd, &cd->u.luks2.hdr, keyslot, token, 1, 1); |
| } |
| |
| int crypt_token_unassign_keyslot(struct crypt_device *cd, int token, int keyslot) |
| { |
| int r; |
| |
| if ((r = onlyLUKS2(cd))) |
| return r; |
| |
| return LUKS2_token_assign(cd, &cd->u.luks2.hdr, keyslot, token, 0, 1); |
| } |
| |
| int crypt_token_is_assigned(struct crypt_device *cd, int token, int keyslot) |
| { |
| int r; |
| |
| if ((r = _onlyLUKS2(cd, CRYPT_CD_QUIET | CRYPT_CD_UNRESTRICTED))) |
| return r; |
| |
| return LUKS2_token_is_assigned(cd, &cd->u.luks2.hdr, keyslot, token); |
| } |
| |
| /* Internal only */ |
| int crypt_metadata_locking_enabled(void) |
| { |
| return _metadata_locking; |
| } |
| |
| int crypt_metadata_locking(struct crypt_device *cd, int enable) |
| { |
| if (enable && !_metadata_locking) |
| return -EPERM; |
| |
| _metadata_locking = enable ? 1 : 0; |
| return 0; |
| } |
| |
| int crypt_persistent_flags_set(struct crypt_device *cd, crypt_flags_type type, uint32_t flags) |
| { |
| int r; |
| |
| if ((r = onlyLUKS2(cd))) |
| return r; |
| |
| if (type == CRYPT_FLAGS_ACTIVATION) |
| return LUKS2_config_set_flags(cd, &cd->u.luks2.hdr, flags); |
| |
| if (type == CRYPT_FLAGS_REQUIREMENTS) |
| return LUKS2_config_set_requirements(cd, &cd->u.luks2.hdr, flags); |
| |
| return -EINVAL; |
| } |
| |
| int crypt_persistent_flags_get(struct crypt_device *cd, crypt_flags_type type, uint32_t *flags) |
| { |
| int r; |
| |
| if (!flags) |
| return -EINVAL; |
| |
| if ((r = _onlyLUKS2(cd, CRYPT_CD_UNRESTRICTED))) |
| return r; |
| |
| if (type == CRYPT_FLAGS_ACTIVATION) |
| return LUKS2_config_get_flags(cd, &cd->u.luks2.hdr, flags); |
| |
| if (type == CRYPT_FLAGS_REQUIREMENTS) |
| return LUKS2_config_get_requirements(cd, &cd->u.luks2.hdr, flags); |
| |
| return -EINVAL; |
| } |
| |
| static int update_volume_key_segment_digest(struct crypt_device *cd, struct luks2_hdr *hdr, int digest, int commit) |
| { |
| int r; |
| |
| /* Remove any assignments in memory */ |
| r = LUKS2_digest_segment_assign(cd, hdr, CRYPT_DEFAULT_SEGMENT, CRYPT_ANY_DIGEST, 0, 0); |
| if (r) |
| return r; |
| |
| /* Assign it to the specific digest */ |
| return LUKS2_digest_segment_assign(cd, hdr, CRYPT_DEFAULT_SEGMENT, digest, 1, commit); |
| } |
| |
| static int verify_and_update_segment_digest(struct crypt_device *cd, |
| struct luks2_hdr *hdr, int keyslot, |
| const char *volume_key, size_t volume_key_size, |
| const char *password, size_t password_size) |
| { |
| int digest, r; |
| struct volume_key *vk = NULL; |
| |
| if (keyslot < 0 || (volume_key && !volume_key_size)) |
| return -EINVAL; |
| |
| if (volume_key) |
| vk = crypt_alloc_volume_key(volume_key_size, volume_key); |
| else { |
| r = LUKS2_keyslot_open(cd, keyslot, CRYPT_ANY_SEGMENT, password, password_size, &vk); |
| if (r != keyslot) { |
| r = -EINVAL; |
| goto out; |
| } |
| } |
| |
| if (!vk) |
| return -ENOMEM; |
| |
| /* check volume_key (param) digest matches keyslot digest */ |
| r = LUKS2_digest_verify(cd, hdr, vk, keyslot); |
| if (r < 0) |
| goto out; |
| digest = r; |
| |
| /* nothing to do, volume key in keyslot is already assigned to default segment */ |
| r = LUKS2_digest_verify_by_segment(cd, hdr, CRYPT_DEFAULT_SEGMENT, vk); |
| if (r >= 0) |
| goto out; |
| |
| r = update_volume_key_segment_digest(cd, &cd->u.luks2.hdr, digest, 1); |
| if (r) |
| log_err(cd, _("Failed to assign keyslot %u as the new volume key."), keyslot); |
| out: |
| crypt_free_volume_key(vk); |
| return r < 0 ? r : keyslot; |
| } |
| |
| |
| int crypt_keyslot_add_by_key(struct crypt_device *cd, |
| int keyslot, |
| const char *volume_key, |
| size_t volume_key_size, |
| const char *passphrase, |
| size_t passphrase_size, |
| uint32_t flags) |
| { |
| int digest, r; |
| struct luks2_keyslot_params params; |
| struct volume_key *vk = NULL; |
| |
| if (!passphrase || ((flags & CRYPT_VOLUME_KEY_NO_SEGMENT) && |
| (flags & CRYPT_VOLUME_KEY_SET))) |
| return -EINVAL; |
| |
| log_dbg("Adding new keyslot %d with volume key %sassigned to a crypt segment.", |
| keyslot, flags & CRYPT_VOLUME_KEY_NO_SEGMENT ? "un" : ""); |
| |
| if ((r = onlyLUKS2(cd))) |
| return r; |
| |
| /* new volume key assignment */ |
| if ((flags & CRYPT_VOLUME_KEY_SET) && crypt_keyslot_status(cd, keyslot) > CRYPT_SLOT_INACTIVE) |
| return verify_and_update_segment_digest(cd, &cd->u.luks2.hdr, |
| keyslot, volume_key, volume_key_size, passphrase, passphrase_size); |
| |
| r = keyslot_verify_or_find_empty(cd, &keyslot); |
| if (r < 0) |
| return r; |
| |
| if (volume_key) |
| vk = crypt_alloc_volume_key(volume_key_size, volume_key); |
| else if (cd->volume_key) |
| vk = crypt_alloc_volume_key(cd->volume_key->keylength, cd->volume_key->key); |
| else if (flags & CRYPT_VOLUME_KEY_NO_SEGMENT) |
| vk = crypt_generate_volume_key(cd, volume_key_size); |
| else |
| return -EINVAL; |
| |
| if (!vk) |
| return -ENOMEM; |
| |
| /* if key matches volume key digest tear down new vk flag */ |
| digest = LUKS2_digest_verify_by_segment(cd, &cd->u.luks2.hdr, CRYPT_DEFAULT_SEGMENT, vk); |
| if (digest >= 0) |
| flags &= ~CRYPT_VOLUME_KEY_SET; |
| |
| /* no segment flag or new vk flag requires new key digest */ |
| if (flags & (CRYPT_VOLUME_KEY_NO_SEGMENT | CRYPT_VOLUME_KEY_SET)) { |
| digest = LUKS2_digest_create(cd, "pbkdf2", &cd->u.luks2.hdr, vk); |
| r = LUKS2_keyslot_params_default(cd, &cd->u.luks2.hdr, 0, ¶ms); |
| } else |
| r = LUKS2_keyslot_params_default(cd, &cd->u.luks2.hdr, vk->keylength, ¶ms); |
| |
| if (r < 0) { |
| log_err(cd, _("Failed to initialise default LUKS2 keyslot parameters.")); |
| goto out; |
| } |
| |
| r = digest; |
| if (r < 0) { |
| log_err(cd, _("Volume key does not match the volume.")); |
| goto out; |
| } |
| |
| r = LUKS2_digest_assign(cd, &cd->u.luks2.hdr, keyslot, digest, 1, 0); |
| if (r < 0) { |
| log_err(cd, _("Failed to assign keyslot %d to digest."), keyslot); |
| goto out; |
| } |
| |
| r = LUKS2_keyslot_store(cd, &cd->u.luks2.hdr, keyslot, |
| passphrase, passphrase_size, vk, ¶ms); |
| |
| if (r >= 0 && (flags & CRYPT_VOLUME_KEY_SET)) |
| r = update_volume_key_segment_digest(cd, &cd->u.luks2.hdr, digest, 1); |
| out: |
| crypt_free_volume_key(vk); |
| if (r < 0) { |
| _luks2_reload(cd); |
| return r; |
| } |
| return keyslot; |
| } |
| |
| /* |
| * Keyring handling |
| */ |
| |
| static int kernel_keyring_support(void) |
| { |
| static unsigned _checked = 0; |
| |
| if (!_checked) { |
| _kernel_keyring_supported = keyring_check(); |
| _checked = 1; |
| } |
| |
| return _kernel_keyring_supported; |
| } |
| |
| static int dmcrypt_keyring_bug(void) |
| { |
| uint64_t kversion; |
| |
| if (kernel_version(&kversion)) |
| return 1; |
| return kversion < version(4,15,0,0); |
| } |
| |
| int crypt_use_keyring_for_vk(const struct crypt_device *cd) |
| { |
| uint32_t dmc_flags; |
| |
| /* dm backend must be initialised */ |
| if (!cd || !isLUKS2(cd->type)) |
| return 0; |
| |
| if (!_vk_via_keyring || !kernel_keyring_support()) |
| return 0; |
| |
| if (dm_flags(DM_CRYPT, &dmc_flags)) |
| return dmcrypt_keyring_bug() ? 0 : 1; |
| |
| return (dmc_flags & DM_KERNEL_KEYRING_SUPPORTED); |
| } |
| |
| int crypt_volume_key_keyring(struct crypt_device *cd, int enable) |
| { |
| _vk_via_keyring = enable ? 1 : 0; |
| return 0; |
| } |
| |
| /* internal only */ |
| int crypt_volume_key_load_in_keyring(struct crypt_device *cd, struct volume_key *vk) |
| { |
| int r; |
| |
| if (!vk || !cd) |
| return -EINVAL; |
| |
| if (!vk->key_description) { |
| log_dbg("Invalid key description"); |
| return -EINVAL; |
| } |
| |
| log_dbg("Loading key (%zu bytes) in thread keyring.", vk->keylength); |
| |
| r = keyring_add_key_in_thread_keyring(vk->key_description, vk->key, vk->keylength); |
| if (r) { |
| log_dbg("keyring_add_key_in_thread_keyring failed (error %d)", r); |
| log_err(cd, _("Failed to load key in kernel keyring.")); |
| } else |
| crypt_set_key_in_keyring(cd, 1); |
| |
| return r; |
| } |
| |
| /* internal only */ |
| int crypt_key_in_keyring(struct crypt_device *cd) |
| { |
| return cd ? cd->key_in_keyring : 0; |
| } |
| |
| /* internal only */ |
| void crypt_set_key_in_keyring(struct crypt_device *cd, unsigned key_in_keyring) |
| { |
| if (!cd) |
| return; |
| |
| cd->key_in_keyring = key_in_keyring; |
| } |
| |
| /* internal only */ |
| void crypt_drop_keyring_key(struct crypt_device *cd, const char *key_description) |
| { |
| int r; |
| |
| if (!key_description) |
| return; |
| |
| log_dbg("Requesting keyring key for revoke and unlink."); |
| |
| r = keyring_revoke_and_unlink_key(key_description); |
| if (r) |
| log_dbg("keyring_revoke_and_unlink failed (error %d)", r); |
| crypt_set_key_in_keyring(cd, 0); |
| } |
| |
| int crypt_activate_by_keyring(struct crypt_device *cd, |
| const char *name, |
| const char *key_description, |
| int keyslot, |
| uint32_t flags) |
| { |
| char *passphrase; |
| size_t passphrase_size; |
| int r; |
| |
| if (!cd || !key_description) |
| return -EINVAL; |
| |
| log_dbg("%s volume %s [keyslot %d] using passphrase in keyring.", |
| name ? "Activating" : "Checking", name ?: "passphrase", keyslot); |
| |
| if (!kernel_keyring_support()) { |
| log_err(cd, _("Kernel keyring is not supported by the kernel.")); |
| return -EINVAL; |
| } |
| |
| r = _activate_check_status(cd, name); |
| if (r < 0) |
| return r; |
| |
| r = keyring_get_passphrase(key_description, &passphrase, &passphrase_size); |
| if (r < 0) { |
| log_err(cd, _("Failed to read passphrase from keyring (error %d)."), r); |
| return -EINVAL; |
| } |
| |
| r = _activate_by_passphrase(cd, name, keyslot, passphrase, passphrase_size, flags); |
| |
| crypt_memzero(passphrase, passphrase_size); |
| free(passphrase); |
| |
| return r; |
| } |
| |
| static void __attribute__((destructor)) libcryptsetup_exit(void) |
| { |
| crypt_backend_destroy(); |
| crypt_random_exit(); |
| } |