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9679fb7f256a1cf5ca1fe46baa6b19e7b9cdcb1b
cryptsetup/lib/setup.c
Milan Broz 9679fb7f25 Add crypt_get_device_name() to API (get underlying device name). 
git-svn-id: https://cryptsetup.googlecode.com/svn/trunk@342 36d66b0a-2a48-0410-832c-cd162a569da5
2010-10-18 14:47:06 +00:00

2095 lines
48 KiB
C
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#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <fcntl.h>
#include <errno.h>
#include "libcryptsetup.h"
#include "luks.h"
#include "internal.h"
struct crypt_device {
char *type;
char *device;
struct luks_masterkey *volume_key;
uint64_t timeout;
uint64_t iteration_time;
int tries;
int password_verify;
/* used in CRYPT_LUKS1 */
struct luks_phdr hdr;
uint64_t PBKDF2_per_sec;
/* used in CRYPT_PLAIN */
struct crypt_params_plain plain_hdr;
char *plain_cipher;
char *plain_cipher_mode;
char *plain_uuid;
/* callbacks definitions */
void (*log)(int level, const char *msg, void *usrptr);
void *log_usrptr;
int (*confirm)(const char *msg, void *usrptr);
void *confirm_usrptr;
int (*password)(const char *msg, char *buf, size_t length, void *usrptr);
void *password_usrptr;
};
/* Log helper */
static void (*_default_log)(int level, const char *msg, void *usrptr) = NULL;
static int _debug_level = 0;
void crypt_set_debug_level(int level)
{
_debug_level = level;
}
int crypt_get_debug_level()
{
return _debug_level;
}
void crypt_log(struct crypt_device *cd, int level, const char *msg)
{
if (cd && cd->log)
cd->log(level, msg, cd->log_usrptr);
else if (_default_log)
_default_log(level, msg, NULL);
}
void logger(struct crypt_device *cd, int level, const char *file,
int line, const char *format, ...)
{
va_list argp;
char *target = NULL;
va_start(argp, format);
if (vasprintf(&target, format, argp) > 0) {
if (level >= 0) {
crypt_log(cd, level, target);
#ifdef CRYPT_DEBUG
} else if (_debug_level)
printf("# %s:%d %s\n", file ?: "?", line, target);
#else
} else if (_debug_level)
printf("# %s\n", target);
#endif
}
va_end(argp);
free(target);
}
/*
* Password processing behaviour matrix of process_key
*
* from binary file: check if there is sufficently large key material
* interactive & from fd: hash if requested, otherwise crop or pad with '0'
*/
static char *process_key(struct crypt_device *cd, const char *hash_name,
const char *key_file, size_t key_size,
const char *pass, size_t passLen)
{
char *key = safe_alloc(key_size);
memset(key, 0, key_size);
/* key is coming from binary file */
if (key_file && strcmp(key_file, "-")) {
if(passLen < key_size) {
log_err(cd, _("Cannot not read %d bytes from key file %s.\n"),
key_size, key_file);
safe_free(key);
return NULL;
}
memcpy(key, pass, key_size);
return key;
}
/* key is coming from tty, fd or binary stdin */
if (hash_name) {
if (hash(NULL, hash_name, key, key_size, pass, passLen) < 0) {
log_err(cd, _("Key processing error (using hash algorithm %s).\n"),
hash_name);
safe_free(key);
return NULL;
}
} else if (passLen > key_size) {
memcpy(key, pass, key_size);
} else {
memcpy(key, pass, passLen);
}
return key;
}
int parse_into_name_and_mode(const char *nameAndMode, char *name, char *mode)
{
/* Token content stringification, see info cpp/stringification */
#define str(s) #s
#define xstr(s) str(s)
#define scanpattern1 "%" xstr(LUKS_CIPHERNAME_L) "[^-]-%" xstr(LUKS_CIPHERMODE_L) "s"
#define scanpattern2 "%" xstr(LUKS_CIPHERNAME_L) "[^-]"
int r;
if(sscanf(nameAndMode,scanpattern1, name, mode) != 2) {
if((r = sscanf(nameAndMode,scanpattern2,name)) == 1)
strncpy(mode,"cbc-plain",10);
else
return -EINVAL;
}
return 0;
#undef scanpattern1
#undef scanpattern2
#undef str
#undef xstr
}
static int isPLAIN(const char *type)
{
return (type && !strcmp(CRYPT_PLAIN, type));
}
static int isLUKS(const char *type)
{
return (type && !strcmp(CRYPT_LUKS1, type));
}
/* keyslot helpers */
static int keyslot_verify_or_find_empty(struct crypt_device *cd, int *keyslot)
{
if (*keyslot == CRYPT_ANY_SLOT) {
*keyslot = LUKS_keyslot_find_empty(&cd->hdr);
if (*keyslot < 0) {
log_err(cd, _("All key slots full.\n"));
return -EINVAL;
}
}
switch (LUKS_keyslot_info(&cd->hdr, *keyslot)) {
case CRYPT_SLOT_INVALID:
log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
*keyslot, LUKS_NUMKEYS - 1);
return -EINVAL;
case CRYPT_SLOT_INACTIVE:
break;
default:
log_err(cd, _("Key slot %d is full, please select another one.\n"),
*keyslot);
return -EINVAL;
}
return 0;
}
static int verify_other_keyslot(struct crypt_device *cd,
const char *key_file,
unsigned int flags,
int keyIndex)
{
struct luks_masterkey *mk;
crypt_keyslot_info ki;
int openedIndex;
char *password = NULL;
unsigned int passwordLen;
get_key(_("Enter any remaining LUKS passphrase: "), &password,
&passwordLen, 0, key_file, cd->timeout, flags, cd);
if(!password)
return -EINVAL;
ki = crypt_keyslot_status(cd, keyIndex);
if (ki == CRYPT_SLOT_ACTIVE) /* Not last slot */
LUKS_keyslot_set(&cd->hdr, keyIndex, 0);
openedIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT,
password, passwordLen,
&cd->hdr, &mk, cd);
if (ki == CRYPT_SLOT_ACTIVE)
LUKS_keyslot_set(&cd->hdr, keyIndex, 1);
LUKS_dealloc_masterkey(mk);
safe_free(password);
if (openedIndex < 0)
return -EPERM;
log_verbose(cd, _("Key slot %d verified.\n"), openedIndex);
return 0;
}
static int find_keyslot_by_passphrase(struct crypt_device *cd,
const char *key_file,
unsigned int flags,
char *message)
{
struct luks_masterkey *mk;
char *password = NULL;
unsigned int passwordLen;
int keyIndex;
get_key(message,&password,&passwordLen, 0, key_file,
cd->timeout, flags, cd);
if(!password)
return -EINVAL;
keyIndex = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
passwordLen, &cd->hdr, &mk, cd);
LUKS_dealloc_masterkey(mk);
safe_free(password);
return keyIndex;
}
static int device_check_and_adjust(struct crypt_device *cd,
const char *device,
uint64_t *size, uint64_t *offset,
int *read_only)
{
struct device_infos infos;
if (!device || get_device_infos(device, &infos, cd) < 0) {
log_err(cd, _("Cannot get info about device %s.\n"),
device ?: "[none]");
return -ENOTBLK;
}
if (!*size) {
*size = infos.size;
if (!*size) {
log_err(cd, _("Device %s has zero size.\n"), device);
return -ENOTBLK;
}
if (*size < *offset) {
log_err(cd, _("Device %s is too small.\n"), device);
return -EINVAL;
}
*size -= *offset;
}
if (infos.readonly)
*read_only = 1;
log_dbg("Calculated device size is %" PRIu64 " sectors (%s), offset %" PRIu64 ".",
*size, *read_only ? "RO" : "RW", *offset);
return 0;
}
static int luks_remove_helper(struct crypt_device *cd,
int key_slot,
const char *other_key_file,
const char *key_file,
int verify)
{
crypt_keyslot_info ki;
int r = -EINVAL;
if (key_slot == CRYPT_ANY_SLOT) {
key_slot = find_keyslot_by_passphrase(cd, key_file, 0,
_("Enter LUKS passphrase to be deleted: "));
if(key_slot < 0) {
r = -EPERM;
goto out;
}
log_std(cd, _("key slot %d selected for deletion.\n"), key_slot);
}
ki = crypt_keyslot_status(cd, key_slot);
if (ki == CRYPT_SLOT_INVALID) {
log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
key_slot, LUKS_NUMKEYS - 1);
r = -EINVAL;
goto out;
}
if (ki <= CRYPT_SLOT_INACTIVE) {
log_err(cd, _("Key %d not active. Can't wipe.\n"), key_slot);
r = -EINVAL;
goto out;
}
if (ki == CRYPT_SLOT_ACTIVE_LAST && cd->confirm &&
!(cd->confirm(_("This is the last keyslot."
" Device will become unusable after purging this key."),
cd->confirm_usrptr))) {
r = -EINVAL;
goto out;
}
if(verify)
r = verify_other_keyslot(cd, other_key_file, 0, key_slot);
else
r = 0;
if (!r)
r = crypt_keyslot_destroy(cd, key_slot);
out:
return (r < 0) ? r : 0;
}
static int create_device_helper(struct crypt_device *cd,
const char *name,
const char *hash,
const char *cipher,
const char *cipher_mode,
const char *key_file,
const char *key,
unsigned int keyLen,
int key_size,
uint64_t size,
uint64_t skip,
uint64_t offset,
const char *uuid,
int read_only,
unsigned int flags,
int reload)
{
crypt_status_info ci;
char *dm_cipher = NULL;
char *processed_key = NULL;
int r;
if (!name)
return -EINVAL;
ci = crypt_status(cd, name);
if (ci == CRYPT_INVALID)
return -EINVAL;
if (reload && ci < CRYPT_ACTIVE)
return -EINVAL;
if (!reload && ci >= CRYPT_ACTIVE) {
log_err(cd, _("Device %s already exists.\n"), name);
return -EEXIST;
}
if (key_size < 0 || key_size > 1024) {
log_err(cd, _("Invalid key size %d.\n"), key_size);
return -EINVAL;
}
r = device_check_and_adjust(cd, cd->device, &size, &offset, &read_only);
if (r)
return r;
if (cipher_mode && asprintf(&dm_cipher, "%s-%s", cipher, cipher_mode) < 0)
return -ENOMEM;
processed_key = process_key(cd, hash, key_file, key_size, key, keyLen);
if (!processed_key)
return -ENOENT;
r = dm_create_device(name, cd->device, dm_cipher ?: cipher, cd->type, uuid, size, skip, offset,
key_size, processed_key, read_only, reload);
free(dm_cipher);
safe_free(processed_key);
return r;
}
static int open_from_hdr_and_mk(struct crypt_device *cd,
struct luks_masterkey *mk,
const char *name,
uint32_t flags)
{
uint64_t size, offset;
char *cipher;
int read_only, no_uuid, r;
size = 0;
offset = crypt_get_data_offset(cd);
read_only = flags & CRYPT_ACTIVATE_READONLY;
no_uuid = flags & CRYPT_ACTIVATE_NO_UUID;
r = device_check_and_adjust(cd, cd->device, &size, &offset, &read_only);
if (r)
return r;
if (asprintf(&cipher, "%s-%s", crypt_get_cipher(cd),
crypt_get_cipher_mode(cd)) < 0)
r = -ENOMEM;
else
r = dm_create_device(name, cd->device, cipher, cd->type,
no_uuid ? NULL : crypt_get_uuid(cd),
size, 0, offset, mk->keyLength, mk->key,
read_only, 0);
free(cipher);
return r;
}
static void log_wrapper(int level, const char *msg, void *usrptr)
{
void (*xlog)(int level, char *msg) = usrptr;
xlog(level, (char *)msg);
}
static int yesDialog_wrapper(const char *msg, void *usrptr)
{
int (*xyesDialog)(char *msg) = usrptr;
return xyesDialog((char*)msg);
}
int crypt_confirm(struct crypt_device *cd, const char *msg)
{
if (!cd || !cd->confirm)
return 1;
else
return cd->confirm(msg, cd->confirm_usrptr);
}
static void key_from_terminal(struct crypt_device *cd, char *msg, char **key,
unsigned int *key_len, int force_verify)
{
int r, flags = 0;
if (cd->password) {
*key = safe_alloc(MAX_TTY_PASSWORD_LEN);
if (*key)
return;
r = cd->password(msg, *key, (size_t)key_len, cd->password_usrptr);
if (r < 0) {
safe_free(*key);
*key = NULL;
} else
*key_len = r;
} else {
if (force_verify || cd->password_verify)
flags |= CRYPT_FLAG_VERIFY_IF_POSSIBLE;
get_key(msg, key, key_len, 0, NULL, cd->timeout, flags, cd);
}
}
static int volume_key_by_terminal_passphrase(struct crypt_device *cd, int keyslot,
struct luks_masterkey **mk)
{
char *prompt = NULL, *passphrase_read = NULL;
unsigned int passphrase_size_read;
int r = -EINVAL, tries = cd->tries;
if(asprintf(&prompt, _("Enter passphrase for %s: "), cd->device) < 0)
return -ENOMEM;
*mk = NULL;
do {
if (*mk)
LUKS_dealloc_masterkey(*mk);
*mk = NULL;
key_from_terminal(cd, prompt, &passphrase_read,
&passphrase_size_read, 0);
if(!passphrase_read) {
r = -EINVAL;
break;
}
r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
passphrase_size_read, &cd->hdr, mk, cd);
safe_free(passphrase_read);
passphrase_read = NULL;
} while (r == -EPERM && (--tries > 0));
if (r < 0 && *mk) {
LUKS_dealloc_masterkey(*mk);
*mk = NULL;
}
free(prompt);
return r;
}
static void key_from_file(struct crypt_device *cd, char *msg,
char **key, unsigned int *key_len,
const char *key_file, size_t key_size)
{
get_key(msg, key, key_len, key_size, key_file, cd->timeout, 0, cd);
}
static int _crypt_init(struct crypt_device **cd,
const char *type,
struct crypt_options *options,
int load, int need_dm)
{
int init_by_name, r;
/* if it is plain device and mapping table is being reloaded
initialize it by name*/
init_by_name = (type && !strcmp(type, CRYPT_PLAIN) && load);
/* Some of old API calls do not require DM in kernel,
fake initialisation by initialise it with kernel_check disabled */
if (!need_dm)
(void)dm_init(NULL, 0);
if (init_by_name)
r = crypt_init_by_name(cd, options->name);
else
r = crypt_init(cd, options->device);
if (!need_dm)
dm_exit();
if (r)
return -EINVAL;
crypt_set_log_callback(*cd, log_wrapper, options->icb->log);
crypt_set_confirm_callback(*cd, yesDialog_wrapper, options->icb->yesDialog);
crypt_set_timeout(*cd, options->timeout);
crypt_set_password_retry(*cd, options->tries);
crypt_set_iterarion_time(*cd, options->iteration_time ?: 1000);
crypt_set_password_verify(*cd, options->flags & CRYPT_FLAG_VERIFY);
if (load && !init_by_name)
r = crypt_load(*cd, type, NULL);
if (!r && type && !(*cd)->type) {
(*cd)->type = strdup(type);
if (!(*cd)->type)
r = -ENOMEM;
}
if (r)
crypt_free(*cd);
return r;
}
void crypt_set_log_callback(struct crypt_device *cd,
void (*log)(int level, const char *msg, void *usrptr),
void *usrptr)
{
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)
{
cd->confirm = confirm;
cd->confirm_usrptr = usrptr;
}
void crypt_set_password_callback(struct crypt_device *cd,
int (*password)(const char *msg, char *buf, size_t length, void *usrptr),
void *usrptr)
{
cd->password = password;
cd->password_usrptr = usrptr;
}
/* OPTIONS: name, cipher, device, hash, key_file, key_size, key_slot,
* offset, size, skip, timeout, tries, passphrase_fd (ignored),
* flags, icb */
static int crypt_create_and_update_device(struct crypt_options *options, int update)
{
struct crypt_device *cd = NULL;
char *key = NULL;
unsigned int keyLen;
int r;
r = _crypt_init(&cd, CRYPT_PLAIN, options, 0, 1);
if (r)
return r;
get_key(_("Enter passphrase: "), &key, &keyLen, options->key_size,
options->key_file, cd->timeout, options->flags, cd);
if (!key)
r = -ENOENT;
else
r = create_device_helper(cd, options->name, options->hash,
options->cipher, NULL, options->key_file, key, keyLen,
options->key_size, options->size, options->skip,
options->offset, NULL, options->flags & CRYPT_FLAG_READONLY,
options->flags, update);
safe_free(key);
crypt_free(cd);
return r;
}
int crypt_create_device(struct crypt_options *options)
{
return crypt_create_and_update_device(options, 0);
}
int crypt_update_device(struct crypt_options *options)
{
return crypt_create_and_update_device(options, 1);
}
/* OPTIONS: name, size, icb */
int crypt_resize_device(struct crypt_options *options)
{
struct crypt_device *cd = NULL;
char *device = NULL, *cipher = NULL, *uuid = NULL, *key = NULL;
char *type = NULL;
uint64_t size, skip, offset;
int key_size, read_only, r;
log_dbg("Resizing device %s to %" PRIu64 " sectors.", options->name, options->size);
if (dm_init(NULL, 1) < 0)
return -ENOSYS;
r = dm_query_device(options->name, &device, &size, &skip, &offset,
&cipher, &key_size, &key, &read_only, NULL, &uuid);
if (r < 0) {
log_err(NULL, _("Device %s is not active.\n"), options->name);
goto out;
}
/* Try to determine type of device from UUID */
type = CRYPT_PLAIN;
if (uuid) {
if (!strncmp(uuid, CRYPT_PLAIN, strlen(CRYPT_PLAIN))) {
type = CRYPT_PLAIN;
free (uuid);
uuid = NULL;
} else if (!strncmp(uuid, CRYPT_LUKS1, strlen(CRYPT_LUKS1)))
type = CRYPT_LUKS1;
}
if (!options->device)
options->device = device;
r = _crypt_init(&cd, type, options, 1, 1);
if (r)
goto out;
size = options->size;
r = device_check_and_adjust(cd, device, &size, &offset, &read_only);
if (r)
goto out;
r = dm_create_device(options->name, device, cipher, type,
crypt_get_uuid(cd), size, skip, offset,
key_size, key, read_only, 1);
out:
safe_free(key);
free(cipher);
if (options->device == device)
options->device = NULL;
free(device);
free(uuid);
crypt_free(cd);
dm_exit();
return r;
}
/* OPTIONS: name, icb */
int crypt_query_device(struct crypt_options *options)
{
int read_only, r;
log_dbg("Query device %s.", options->name);
if (dm_init(NULL, 1) < 0)
return -ENOSYS;
r = dm_status_device(options->name);
if (r < 0)
goto out;
r = dm_query_device(options->name, (char **)&options->device, &options->size,
&options->skip, &options->offset, (char **)&options->cipher,
&options->key_size, NULL, &read_only, NULL, NULL);
if (r >= 0) {
if (read_only)
options->flags |= CRYPT_FLAG_READONLY;
options->flags |= CRYPT_FLAG_FREE_DEVICE;
options->flags |= CRYPT_FLAG_FREE_CIPHER;
r = 1;
}
out:
if (r == -ENODEV)
r = 0;
dm_exit();
return r;
}
/* OPTIONS: name, icb */
int crypt_remove_device(struct crypt_options *options)
{
struct crypt_device *cd = NULL;
int r;
r = crypt_init_by_name(&cd, options->name);
if (r == 0)
r = crypt_deactivate(cd, options->name);
crypt_free(cd);
return r;
}
/* OPTIONS: device, cipher, hash, align_payload, key_size (master key), key_slot
* new_key_file, iteration_time, timeout, flags, icb */
int crypt_luksFormat(struct crypt_options *options)
{
char cipherName[LUKS_CIPHERNAME_L];
char cipherMode[LUKS_CIPHERMODE_L];
char *password=NULL;
unsigned int passwordLen;
struct crypt_device *cd = NULL;
struct crypt_params_luks1 cp = {
.hash = options->hash,
.data_alignment = options->align_payload
};
int r;
r = parse_into_name_and_mode(options->cipher, cipherName, cipherMode);
if(r < 0) {
log_err(cd, _("No known cipher specification pattern detected.\n"));
return r;
}
if ((r = _crypt_init(&cd, CRYPT_LUKS1, options, 0, 1)))
return r;
if (options->key_slot >= LUKS_NUMKEYS && options->key_slot != CRYPT_ANY_SLOT) {
log_err(cd, _("Key slot %d is invalid, please select between 0 and %d.\n"),
options->key_slot, LUKS_NUMKEYS - 1);
r = -EINVAL;
goto out;
}
get_key(_("Enter LUKS passphrase: "), &password, &passwordLen, 0,
options->new_key_file, options->timeout, options->flags, cd);
if(!password) {
r = -EINVAL;
goto out;
}
r = crypt_format(cd, CRYPT_LUKS1, cipherName, cipherMode,
NULL, NULL, options->key_size, &cp);
if (r < 0)
goto out;
/* Add keyslot using internally stored volume key generated during format */
r = crypt_keyslot_add_by_volume_key(cd, options->key_slot, NULL, 0,
password, passwordLen);
out:
crypt_free(cd);
safe_free(password);
return (r < 0) ? r : 0;
}
/* OPTIONS: name, device, key_size, key_file, timeout, tries, flags, icb */
int crypt_luksOpen(struct crypt_options *options)
{
struct crypt_device *cd = NULL;
uint32_t flags = 0;
int r;
if (!options->name)
return -EINVAL;
r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
if (r)
return r;
if (options->flags & CRYPT_FLAG_READONLY)
flags |= CRYPT_ACTIVATE_READONLY;
if (options->flags & CRYPT_FLAG_NON_EXCLUSIVE_ACCESS)
flags |= CRYPT_ACTIVATE_NO_UUID;
if (options->key_file)
r = crypt_activate_by_keyfile(cd, options->name,
CRYPT_ANY_SLOT, options->key_file, options->key_size,
flags);
else
r = crypt_activate_by_passphrase(cd, options->name,
CRYPT_ANY_SLOT, options->passphrase,
options->passphrase ? strlen(options->passphrase) : 0,
flags);
crypt_free(cd);
return (r < 0) ? r : 0;
}
/* OPTIONS: device, keys_slot, key_file, timeout, flags, icb */
int crypt_luksKillSlot(struct crypt_options *options)
{
struct crypt_device *cd = NULL;
int r;
r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
if (r)
return r;
r = luks_remove_helper(cd, options->key_slot, options->key_file, NULL,
options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
crypt_free(cd);
return (r < 0) ? r : 0;
}
/* OPTIONS: device, new_key_file, key_file, timeout, flags, icb */
int crypt_luksRemoveKey(struct crypt_options *options)
{
struct crypt_device *cd = NULL;
int r;
r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
if (r)
return r;
r = luks_remove_helper(cd, CRYPT_ANY_SLOT, options->key_file, options->new_key_file,
options->flags & CRYPT_FLAG_VERIFY_ON_DELKEY);
crypt_free(cd);
return (r < 0) ? r : 0;
}
/* OPTIONS: device, new_key_file, key_file, key_slot, flags,
iteration_time, timeout, icb */
int crypt_luksAddKey(struct crypt_options *options)
{
struct crypt_device *cd = NULL;
int r = -EINVAL;
r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 1);
if (r)
return r;
if (options->key_file || options->new_key_file)
r = crypt_keyslot_add_by_keyfile(cd, options->key_slot,
options->key_file, 0,
options->new_key_file, 0);
else
r = crypt_keyslot_add_by_passphrase(cd, options->key_slot,
NULL, 0, NULL, 0);
crypt_free(cd);
return (r < 0) ? r : 0;
}
/* OPTIONS: device, icb */
int crypt_luksUUID(struct crypt_options *options)
{
struct crypt_device *cd = NULL;
char *uuid;
int r;
r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
if (r)
return r;
uuid = (char *)crypt_get_uuid(cd);
log_std(cd, uuid ?: "");
log_std(cd, "\n");
crypt_free(cd);
return 0;
}
/* OPTIONS: device, icb */
int crypt_isLuks(struct crypt_options *options)
{
struct crypt_device *cd = NULL;
int r;
log_dbg("Check device %s for LUKS header.", options->device);
if (init_crypto()) {
log_err(cd, _("Cannot initialize crypto backend.\n"));
return -ENOSYS;
}
r = crypt_init(&cd, options->device);
if (r < 0)
return -EINVAL;
/* Do print fail here, no need to crypt_load() */
r = LUKS_read_phdr(cd->device, &cd->hdr, 0, cd) ? -EINVAL : 0;
crypt_free(cd);
return r;
}
/* OPTIONS: device, icb */
int crypt_luksDump(struct crypt_options *options)
{
struct crypt_device *cd = NULL;
int r;
r = _crypt_init(&cd, CRYPT_LUKS1, options, 1, 0);
if(r < 0)
return r;
r = crypt_dump(cd);
crypt_free(cd);
return 0;
}
void crypt_get_error(char *buf, size_t size)
{
const char *error = get_error();
if (!buf || size < 1)
set_error(NULL);
else if (error) {
strncpy(buf, error, size - 1);
buf[size - 1] = '\0';
set_error(NULL);
} else
buf[0] = '\0';
}
void crypt_put_options(struct crypt_options *options)
{
if (options->flags & CRYPT_FLAG_FREE_DEVICE) {
free((char *)options->device);
options->device = NULL;
options->flags &= ~CRYPT_FLAG_FREE_DEVICE;
}
if (options->flags & CRYPT_FLAG_FREE_CIPHER) {
free((char *)options->cipher);
options->cipher = NULL;
options->flags &= ~CRYPT_FLAG_FREE_CIPHER;
}
}
const char *crypt_get_dir(void)
{
return dm_get_dir();
}
/////////////////////////////////
//
// New API
//
int crypt_init(struct crypt_device **cd, const char *device)
{
struct crypt_device *h = NULL;
if (!cd)
return -EINVAL;
log_dbg("Allocating crypt device %s context.", device);
if (device && !device_ready(NULL, device, O_RDONLY))
return -ENOTBLK;
if (!(h = malloc(sizeof(struct crypt_device))))
return -ENOMEM;
memset(h, 0, sizeof(*h));
if (device) {
h->device = strdup(device);
if (!h->device) {
free(h);
return -ENOMEM;
}
} else
h->device = NULL;
if (dm_init(h, 1) < 0) {
free(h);
return -ENOSYS;
}
h->iteration_time = 1000;
h->password_verify = 0;
h->tries = 3;
*cd = h;
return 0;
}
int crypt_init_by_name(struct crypt_device **cd, const char *name)
{
crypt_status_info ci;
char *device = NULL;
int r;
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.\n"), name);
return -ENODEV;
}
r = dm_query_device(name, &device, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL);
/* Underlying device disappeared but mapping still active */
if (r >= 0 && !device)
log_verbose(NULL, _("Underlying device for crypt device %s disappeared.\n"),
name);
if (r >= 0)
r = crypt_init(cd, device);
free(device);
return r;
}
static int _crypt_format_plain(struct crypt_device *cd,
const char *cipher,
const char *cipher_mode,
const char *uuid,
struct crypt_params_plain *params)
{
if (!cipher || !cipher_mode) {
log_err(cd, _("Invalid plain crypt parameters.\n"));
return -EINVAL;
}
if (cd->volume_key->keyLength > 1024) {
log_err(cd, _("Invalid key size.\n"));
return -EINVAL;
}
cd->plain_cipher = strdup(cipher);
cd->plain_cipher_mode = strdup(cipher_mode);
if (uuid)
cd->plain_uuid = strdup(uuid);
if (params && params->hash)
cd->plain_hdr.hash = strdup(params->hash);
cd->plain_hdr.offset = params ? params->offset : 0;
cd->plain_hdr.skip = params ? params->skip : 0;
if (!cd->plain_cipher || !cd->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,
struct crypt_params_luks1 *params)
{
int r;
unsigned long required_alignment = DEFAULT_DISK_ALIGNMENT;
unsigned long alignment_offset = 0;
if (!cd->device) {
log_err(cd, _("Can't format LUKS without device.\n"));
return -EINVAL;
}
if (params && params->data_alignment)
required_alignment = params->data_alignment * SECTOR_SIZE;
else
get_topology_alignment(cd->device, &required_alignment,
&alignment_offset, DEFAULT_DISK_ALIGNMENT);
r = LUKS_generate_phdr(&cd->hdr, cd->volume_key, cipher, cipher_mode,
(params && params->hash) ? params->hash : "sha1",
uuid, LUKS_STRIPES,
required_alignment / SECTOR_SIZE,
alignment_offset / SECTOR_SIZE,
cd->iteration_time, &cd->PBKDF2_per_sec, cd);
if(r < 0)
return r;
/* Wipe first 8 sectors - fs magic numbers etc. */
r = wipe_device_header(cd->device, 8);
if(r < 0) {
log_err(cd, _("Can't wipe header on device %s.\n"), cd->device);
return r;
}
r = LUKS_write_phdr(cd->device, &cd->hdr, cd);
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;
log_dbg("Formatting device %s as type %s.", cd->device ?: "(none)", cd->type ?: "(none)");
if (!type)
return -EINVAL;
/* Some hash functions need initialized gcrypt library */
if (init_crypto()) {
log_err(cd, _("Cannot initialize crypto backend.\n"));
return -ENOSYS;
}
if (volume_key)
cd->volume_key = LUKS_alloc_masterkey(volume_key_size,
volume_key);
else
cd->volume_key = LUKS_generate_masterkey(volume_key_size);
if(!cd->volume_key)
return -ENOMEM;
if (isPLAIN(type))
r = _crypt_format_plain(cd, cipher, cipher_mode,
uuid, params);
else if (isLUKS(type))
r = _crypt_format_luks1(cd, cipher, cipher_mode,
uuid, params);
else {
/* FIXME: allow plugins here? */
log_err(cd, _("Unknown crypt device type %s requested.\n"), type);
r = -EINVAL;
}
if (!r && !(cd->type = strdup(type)))
r = -ENOMEM;
if (r < 0) {
LUKS_dealloc_masterkey(cd->volume_key);
cd->volume_key = NULL;
}
return r;
}
int crypt_load(struct crypt_device *cd,
const char *requested_type,
void *params)
{
struct luks_phdr hdr;
int r;
log_dbg("Trying to load %s crypt type from device %s.",
requested_type ?: "any", cd->device ?: "(none)");
if (!cd->device)
return -EINVAL;
if (requested_type && !isLUKS(requested_type))
return -EINVAL;
/* Some hash functions need initialized gcrypt library */
if (init_crypto()) {
log_err(cd, _("Cannot initialize crypto backend.\n"));
return -ENOSYS;
}
r = LUKS_read_phdr(cd->device, &hdr, 1, cd);
if (!r) {
memcpy(&cd->hdr, &hdr, sizeof(hdr));
cd->type = strdup(requested_type);
if (!cd->type)
r = -ENOMEM;
}
return r;
}
int crypt_header_backup(struct crypt_device *cd,
const char *requested_type,
const char *backup_file)
{
if ((requested_type && !isLUKS(requested_type)) || !backup_file)
return -EINVAL;
/* Some hash functions need initialized gcrypt library */
if (init_crypto()) {
log_err(cd, _("Cannot initialize crypto backend.\n"));
return -ENOSYS;
}
log_dbg("Requested header backup of device %s (%s) to "
"file %s.", cd->device, requested_type, backup_file);
return LUKS_hdr_backup(backup_file, cd->device, &cd->hdr, cd);
}
int crypt_header_restore(struct crypt_device *cd,
const char *requested_type,
const char *backup_file)
{
if (requested_type && !isLUKS(requested_type))
return -EINVAL;
/* Some hash functions need initialized gcrypt library */
if (init_crypto()) {
log_err(cd, _("Cannot initialize crypto backend.\n"));
return -ENOSYS;
}
log_dbg("Requested header restore to device %s (%s) from "
"file %s.", cd->device, requested_type, backup_file);
return LUKS_hdr_restore(backup_file, cd->device, &cd->hdr, cd);
}
void crypt_free(struct crypt_device *cd)
{
if (cd) {
log_dbg("Releasing crypt device %s context.", cd->device);
dm_exit();
if (cd->volume_key)
LUKS_dealloc_masterkey(cd->volume_key);
free(cd->device);
free(cd->type);
/* used in plain device only */
free((char*)cd->plain_hdr.hash);
free(cd->plain_cipher);
free(cd->plain_cipher_mode);
free(cd->plain_uuid);
free(cd);
}
}
int crypt_suspend(struct crypt_device *cd,
const char *name)
{
crypt_status_info ci;
int r, suspended = 0;
log_dbg("Suspending volume %s.", name);
ci = crypt_status(NULL, name);
if (ci < CRYPT_ACTIVE) {
log_err(cd, _("Volume %s is not active.\n"), name);
return -EINVAL;
}
if (!cd && dm_init(NULL, 1) < 0)
return -ENOSYS;
r = dm_query_device(name, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, &suspended, NULL);
if (r < 0)
goto out;
if (suspended) {
log_err(cd, _("Volume %s is already suspended.\n"), name);
r = -EINVAL;
goto out;
}
r = dm_suspend_and_wipe_key(name);
if (r == -ENOTSUP)
log_err(cd, "Suspend is not supported for device %s.\n", name);
else if (r)
log_err(cd, "Error during suspending device %s.\n", name);
out:
if (!cd)
dm_exit();
return r;
}
int crypt_resume_by_passphrase(struct crypt_device *cd,
const char *name,
int keyslot,
const char *passphrase,
size_t passphrase_size)
{
struct luks_masterkey *mk = NULL;
int r, suspended = 0;
log_dbg("Resuming volume %s.", name);
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
r = -EINVAL;
goto out;
}
r = dm_query_device(name, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, &suspended, NULL);
if (r < 0)
return r;
if (!suspended) {
log_err(cd, _("Volume %s is not suspended.\n"), name);
return -EINVAL;
}
if (passphrase) {
r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
passphrase_size, &cd->hdr, &mk, cd);
} else
r = volume_key_by_terminal_passphrase(cd, keyslot, &mk);
if (r >= 0) {
keyslot = r;
r = dm_resume_and_reinstate_key(name, mk->keyLength, mk->key);
if (r == -ENOTSUP)
log_err(cd, "Resume is not supported for device %s.\n", name);
else if (r)
log_err(cd, "Error during resuming device %s.\n", name);
} else
r = keyslot;
out:
LUKS_dealloc_masterkey(mk);
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)
{
struct luks_masterkey *mk = NULL;
char *passphrase_read = NULL;
unsigned int passphrase_size_read;
int r, suspended = 0;
log_dbg("Resuming volume %s.", name);
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
r = -EINVAL;
goto out;
}
r = dm_query_device(name, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, &suspended, NULL);
if (r < 0)
return r;
if (!suspended) {
log_err(cd, _("Volume %s is not suspended.\n"), name);
return -EINVAL;
}
if (!keyfile)
return -EINVAL;
key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
&passphrase_size_read, keyfile, keyfile_size);
if(!passphrase_read)
r = -EINVAL;
else {
r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
passphrase_size_read, &cd->hdr, &mk, cd);
safe_free(passphrase_read);
}
if (r >= 0) {
keyslot = r;
r = dm_resume_and_reinstate_key(name, mk->keyLength, mk->key);
if (r)
log_err(cd, "Error during resuming device %s.\n", name);
} else
r = keyslot;
out:
LUKS_dealloc_masterkey(mk);
return r < 0 ? r : keyslot;
}
// slot manipulation
int crypt_keyslot_add_by_passphrase(struct crypt_device *cd,
int keyslot, // -1 any
const char *passphrase, // NULL -> terminal
size_t passphrase_size,
const char *new_passphrase, // NULL -> terminal
size_t new_passphrase_size)
{
struct luks_masterkey *mk = NULL;
char *password = NULL, *new_password = NULL;
unsigned int passwordLen, new_passwordLen;
int r;
log_dbg("Adding new keyslot, existing passphrase %sprovided,"
"new passphrase %sprovided.",
passphrase ? "" : "not ", new_passphrase ? "" : "not ");
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
return -EINVAL;
}
r = keyslot_verify_or_find_empty(cd, &keyslot);
if (r)
return r;
if (!LUKS_keyslot_active_count(&cd->hdr)) {
/* No slots used, try to use pre-generated key in header */
if (cd->volume_key) {
mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
r = mk ? 0 : -ENOMEM;
} else {
log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
return -EINVAL;
}
} else if (passphrase) {
/* Passphrase provided, use it to unlock existing keyslot */
r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, passphrase,
passphrase_size, &cd->hdr, &mk, cd);
} else {
/* Passphrase not provided, ask first and use it to unlock existing keyslot */
key_from_terminal(cd, _("Enter any passphrase: "),
&password, &passwordLen, 0);
if (!password) {
r = -EINVAL;
goto out;
}
r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password,
passwordLen, &cd->hdr, &mk, cd);
safe_free(password);
}
if(r < 0)
goto out;
if (new_passphrase) {
new_password = (char *)new_passphrase;
new_passwordLen = new_passphrase_size;
} else {
key_from_terminal(cd, _("Enter new passphrase for key slot: "),
&new_password, &new_passwordLen, 1);
if(!new_password) {
r = -EINVAL;
goto out;
}
}
r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
&cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
if(r < 0) goto out;
r = 0;
out:
if (!new_passphrase)
safe_free(new_password);
LUKS_dealloc_masterkey(mk);
return r ?: keyslot;
}
int crypt_keyslot_add_by_keyfile(struct crypt_device *cd,
int keyslot,
const char *keyfile,
size_t keyfile_size,
const char *new_keyfile,
size_t new_keyfile_size)
{
struct luks_masterkey *mk=NULL;
char *password=NULL; unsigned int passwordLen;
char *new_password = NULL; unsigned int new_passwordLen;
int r;
log_dbg("Adding new keyslot, existing keyfile %s, new keyfile %s.",
keyfile ?: "[none]", new_keyfile ?: "[none]");
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
return -EINVAL;
}
r = keyslot_verify_or_find_empty(cd, &keyslot);
if (r)
return r;
if (!LUKS_keyslot_active_count(&cd->hdr)) {
/* No slots used, try to use pre-generated key in header */
if (cd->volume_key) {
mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
r = mk ? 0 : -ENOMEM;
} else {
log_err(cd, _("Cannot add key slot, all slots disabled and no volume key provided.\n"));
return -EINVAL;
}
} else {
/* Read password from file of (if NULL) from terminal */
if (keyfile)
key_from_file(cd, _("Enter any passphrase: "), &password, &passwordLen,
keyfile, keyfile_size);
else
key_from_terminal(cd, _("Enter any passphrase: "),
&password, &passwordLen, 0);
if (!password)
return -EINVAL;
r = LUKS_open_key_with_hdr(cd->device, CRYPT_ANY_SLOT, password, passwordLen,
&cd->hdr, &mk, cd);
safe_free(password);
}
if(r < 0)
goto out;
if (new_keyfile)
key_from_file(cd, _("Enter new passphrase for key slot: "),
&new_password, &new_passwordLen, new_keyfile,
new_keyfile_size);
else
key_from_terminal(cd, _("Enter new passphrase for key slot: "),
&new_password, &new_passwordLen, 1);
if(!new_password) {
r = -EINVAL;
goto out;
}
r = LUKS_set_key(cd->device, keyslot, new_password, new_passwordLen,
&cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
out:
safe_free(new_password);
LUKS_dealloc_masterkey(mk);
return r < 0 ? r : keyslot;
}
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 luks_masterkey *mk = NULL;
int r = -EINVAL;
char *new_password = NULL; unsigned int new_passwordLen;
log_dbg("Adding new keyslot %d using volume key.", keyslot);
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
return -EINVAL;
}
if (volume_key)
mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
else if (cd->volume_key)
mk = LUKS_alloc_masterkey(cd->volume_key->keyLength, cd->volume_key->key);
if (!mk)
return -ENOMEM;
r = LUKS_verify_master_key(&cd->hdr, mk);
if (r < 0) {
log_err(cd, _("Volume key does not match the volume.\n"));
goto out;
}
r = keyslot_verify_or_find_empty(cd, &keyslot);
if (r)
goto out;
if (!passphrase) {
key_from_terminal(cd, _("Enter new passphrase for key slot: "),
&new_password, &new_passwordLen, 1);
passphrase = new_password;
passphrase_size = new_passwordLen;
}
r = LUKS_set_key(cd->device, keyslot, passphrase, passphrase_size,
&cd->hdr, mk, cd->iteration_time, &cd->PBKDF2_per_sec, cd);
out:
if (new_password)
safe_free(new_password);
LUKS_dealloc_masterkey(mk);
return r ?: keyslot;
}
int crypt_keyslot_destroy(struct crypt_device *cd, int keyslot)
{
crypt_keyslot_info ki;
log_dbg("Destroying keyslot %d.", keyslot);
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
return -EINVAL;
}
ki = crypt_keyslot_status(cd, keyslot);
if (ki == CRYPT_SLOT_INVALID) {
log_err(cd, _("Key slot %d is invalid.\n"), keyslot);
return -EINVAL;
}
if (ki == CRYPT_SLOT_INACTIVE) {
log_err(cd, _("Key slot %d is not used.\n"), keyslot);
return -EINVAL;
}
return LUKS_del_key(cd->device, keyslot, &cd->hdr, cd);
}
// 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)
{
crypt_status_info ci;
struct luks_masterkey *mk = NULL;
char *prompt = NULL;
int r;
log_dbg("%s volume %s [keyslot %d] using %spassphrase.",
name ? "Activating" : "Checking", name ?: "",
keyslot, passphrase ? "" : "[none] ");
/* plain, use hashed passphrase */
if (isPLAIN(cd->type))
return create_device_helper(cd, name, cd->plain_hdr.hash,
cd->plain_cipher, cd->plain_cipher_mode, NULL, passphrase, passphrase_size,
cd->volume_key->keyLength, 0, cd->plain_hdr.skip,
cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
if (name) {
ci = crypt_status(NULL, name);
if (ci == CRYPT_INVALID)
return -EINVAL;
else if (ci >= CRYPT_ACTIVE) {
log_err(cd, _("Device %s already exists.\n"), name);
return -EEXIST;
}
}
if(asprintf(&prompt, _("Enter passphrase for %s: "), cd->device) < 0)
return -ENOMEM;
/* provided passphrase, do not retry */
if (passphrase) {
r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
passphrase_size, &cd->hdr, &mk, cd);
} else
r = volume_key_by_terminal_passphrase(cd, keyslot, &mk);
if (r >= 0) {
keyslot = r;
if (name)
r = open_from_hdr_and_mk(cd, mk, name, flags);
}
LUKS_dealloc_masterkey(mk);
free(prompt);
return r < 0 ? r : keyslot;
}
int crypt_activate_by_keyfile(struct crypt_device *cd,
const char *name,
int keyslot,
const char *keyfile,
size_t keyfile_size,
uint32_t flags)
{
crypt_status_info ci;
struct luks_masterkey *mk = NULL;
char *passphrase_read = NULL;
unsigned int passphrase_size_read;
int r;
log_dbg("Activating volume %s [keyslot %d] using keyfile %s.",
name ?: "", keyslot, keyfile ?: "[none]");
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
return -EINVAL;
}
if (name) {
ci = crypt_status(NULL, name);
if (ci == CRYPT_INVALID)
return -EINVAL;
else if (ci >= CRYPT_ACTIVE) {
log_err(cd, _("Device %s already exists.\n"), name);
return -EEXIST;
}
}
if (!keyfile)
return -EINVAL;
key_from_file(cd, _("Enter passphrase: "), &passphrase_read,
&passphrase_size_read, keyfile, keyfile_size);
if(!passphrase_read)
r = -EINVAL;
else {
r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase_read,
passphrase_size_read, &cd->hdr, &mk, cd);
safe_free(passphrase_read);
}
if (r >= 0) {
keyslot = r;
if (name)
r = open_from_hdr_and_mk(cd, mk, name, flags);
}
LUKS_dealloc_masterkey(mk);
return r < 0 ? r : keyslot;
}
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)
{
crypt_status_info ci;
struct luks_masterkey *mk;
int r;
log_dbg("Activating volume %s by volume key.", name);
/* use key directly, no hash */
if (isPLAIN(cd->type))
return create_device_helper(cd, name, NULL,
cd->plain_cipher, cd->plain_cipher_mode, NULL, volume_key, volume_key_size,
cd->volume_key->keyLength, 0, cd->plain_hdr.skip,
cd->plain_hdr.offset, cd->plain_uuid, flags & CRYPT_ACTIVATE_READONLY, 0, 0);
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
return -EINVAL;
}
if (name) {
ci = crypt_status(NULL, name);
if (ci == CRYPT_INVALID)
return -EINVAL;
else if (ci >= CRYPT_ACTIVE) {
log_err(cd, _("Device %s already exists.\n"), name);
return -EEXIST;
}
}
mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
if (!mk)
return -ENOMEM;
r = LUKS_verify_master_key(&cd->hdr, mk);
if (r == -EPERM)
log_err(cd, _("Volume key does not match the volume.\n"));
if (!r && name)
r = open_from_hdr_and_mk(cd, mk, name, flags);
LUKS_dealloc_masterkey(mk);
return r;
}
int crypt_deactivate(struct crypt_device *cd, const char *name)
{
int r;
if (!name)
return -EINVAL;
log_dbg("Deactivating volume %s.", name);
if (!cd && dm_init(NULL, 1) < 0)
return -ENOSYS;
switch (crypt_status(cd, name)) {
case CRYPT_ACTIVE:
r = dm_remove_device(name, 0, 0);
break;
case CRYPT_BUSY:
log_err(cd, _("Device %s is busy.\n"), name);
r = -EBUSY;
break;
case CRYPT_INACTIVE:
log_err(cd, _("Device %s is not active.\n"), name);
r = -ENODEV;
break;
default:
log_err(cd, _("Invalid device %s.\n"), name);
r = -EINVAL;
}
if (!cd)
dm_exit();
return r;
}
// misc helper functions
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 luks_masterkey *mk;
char *processed_key = NULL;
int r, key_len;
key_len = crypt_get_volume_key_size(cd);
if (key_len > *volume_key_size) {
log_err(cd, _("Volume key buffer too small.\n"));
return -ENOMEM;
}
if (isPLAIN(cd->type) && cd->plain_hdr.hash) {
processed_key = process_key(cd, cd->plain_hdr.hash, NULL, key_len,
passphrase, passphrase_size);
if (!processed_key) {
log_err(cd, _("Cannot retrieve volume key for plain device.\n"));
return -EINVAL;
}
memcpy(volume_key, processed_key, key_len);
*volume_key_size = key_len;
safe_free(processed_key);
return 0;
}
if (isLUKS(cd->type)) {
r = LUKS_open_key_with_hdr(cd->device, keyslot, passphrase,
passphrase_size, &cd->hdr, &mk, cd);
if (r >= 0) {
memcpy(volume_key, mk->key, mk->keyLength);
*volume_key_size = mk->keyLength;
}
LUKS_dealloc_masterkey(mk);
return r;
}
log_err(cd, _("This operation is not supported for %s crypt device.\n"), cd->type ?: "(none)");
return -EINVAL;
}
int crypt_volume_key_verify(struct crypt_device *cd,
const char *volume_key,
size_t volume_key_size)
{
struct luks_masterkey *mk;
int r;
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
return -EINVAL;
}
mk = LUKS_alloc_masterkey(volume_key_size, volume_key);
if (!mk)
return -ENOMEM;
r = LUKS_verify_master_key(&cd->hdr, mk);
if (r == -EPERM)
log_err(cd, _("Volume key does not match the volume.\n"));
LUKS_dealloc_masterkey(mk);
return r;
}
void crypt_set_timeout(struct crypt_device *cd, uint64_t timeout_sec)
{
log_dbg("Timeout set to %" PRIu64 " miliseconds.", timeout_sec);
cd->timeout = timeout_sec;
}
void crypt_set_password_retry(struct crypt_device *cd, int tries)
{
log_dbg("Password retry count set to %d.", tries);
cd->tries = tries;
}
void crypt_set_iterarion_time(struct crypt_device *cd, uint64_t iteration_time_ms)
{
log_dbg("Iteration time set to %" PRIu64 " miliseconds.", iteration_time_ms);
cd->iteration_time = iteration_time_ms;
}
void crypt_set_password_verify(struct crypt_device *cd, int password_verify)
{
log_dbg("Password verification %s.", password_verify ? "enabled" : "disabled");
cd->password_verify = password_verify ? 1 : 0;
}
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 (!cd && dm_init(NULL, 1) < 0)
return CRYPT_INVALID;
r = dm_status_device(name);
if (!cd)
dm_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 hexprintICB(struct crypt_device *cd, char *d, int n)
{
int i;
for(i = 0; i < n; i++)
log_std(cd, "%02hhx ", (char)d[i]);
}
int crypt_dump(struct crypt_device *cd)
{
int i;
if (!isLUKS(cd->type)) { //FIXME
log_err(cd, _("This operation is supported only for LUKS device.\n"));
return -EINVAL;
}
log_std(cd, "LUKS header information for %s\n\n", cd->device);
log_std(cd, "Version: \t%d\n", cd->hdr.version);
log_std(cd, "Cipher name: \t%s\n", cd->hdr.cipherName);
log_std(cd, "Cipher mode: \t%s\n", cd->hdr.cipherMode);
log_std(cd, "Hash spec: \t%s\n", cd->hdr.hashSpec);
log_std(cd, "Payload offset:\t%d\n", cd->hdr.payloadOffset);
log_std(cd, "MK bits: \t%d\n", cd->hdr.keyBytes * 8);
log_std(cd, "MK digest: \t");
hexprintICB(cd, cd->hdr.mkDigest, LUKS_DIGESTSIZE);
log_std(cd, "\n");
log_std(cd, "MK salt: \t");
hexprintICB(cd, cd->hdr.mkDigestSalt, LUKS_SALTSIZE/2);
log_std(cd, "\n \t");
hexprintICB(cd, cd->hdr.mkDigestSalt+LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
log_std(cd, "\n");
log_std(cd, "MK iterations: \t%d\n", cd->hdr.mkDigestIterations);
log_std(cd, "UUID: \t%s\n\n", cd->hdr.uuid);
for(i = 0; i < LUKS_NUMKEYS; i++) {
if(cd->hdr.keyblock[i].active == LUKS_KEY_ENABLED) {
log_std(cd, "Key Slot %d: ENABLED\n",i);
log_std(cd, "\tIterations: \t%d\n",
cd->hdr.keyblock[i].passwordIterations);
log_std(cd, "\tSalt: \t");
hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt,
LUKS_SALTSIZE/2);
log_std(cd, "\n\t \t");
hexprintICB(cd, cd->hdr.keyblock[i].passwordSalt +
LUKS_SALTSIZE/2, LUKS_SALTSIZE/2);
log_std(cd, "\n");
log_std(cd, "\tKey material offset:\t%d\n",
cd->hdr.keyblock[i].keyMaterialOffset);
log_std(cd, "\tAF stripes: \t%d\n",
cd->hdr.keyblock[i].stripes);
}
else
log_std(cd, "Key Slot %d: DISABLED\n", i);
}
log_std(cd, "DNAME: %s\n", crypt_get_device_name(cd) ?: "");
return 0;
}
const char *crypt_get_cipher(struct crypt_device *cd)
{
if (isPLAIN(cd->type))
return cd->plain_cipher;
if (isLUKS(cd->type))
return cd->hdr.cipherName;
return NULL;
}
const char *crypt_get_cipher_mode(struct crypt_device *cd)
{
if (isPLAIN(cd->type))
return cd->plain_cipher_mode;
if (isLUKS(cd->type))
return cd->hdr.cipherMode;
return NULL;
}
const char *crypt_get_uuid(struct crypt_device *cd)
{
if (isLUKS(cd->type))
return cd->hdr.uuid;
return NULL;
}
const char *crypt_get_device_name(struct crypt_device *cd)
{
return cd->device;
}
int crypt_get_volume_key_size(struct crypt_device *cd)
{
if (isPLAIN(cd->type))
return cd->volume_key->keyLength;
if (isLUKS(cd->type))
return cd->hdr.keyBytes;
return 0;
}
uint64_t crypt_get_data_offset(struct crypt_device *cd)
{
if (isPLAIN(cd->type))
return cd->plain_hdr.offset;
if (isLUKS(cd->type))
return cd->hdr.payloadOffset;
return 0;
}
crypt_keyslot_info crypt_keyslot_status(struct crypt_device *cd, int keyslot)
{
if (!isLUKS(cd->type)) {
log_err(cd, _("This operation is supported only for LUKS device.\n"));
return CRYPT_SLOT_INVALID;
}
return LUKS_keyslot_info(&cd->hdr, keyslot);
}
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