static int activate_luks_headers(struct reenc_ctx *rc)
{
struct crypt_device *cd = NULL, *cd_new = NULL;
const char *pwd_old, *pwd_new, pwd_empty[] = "";
size_t pwd_old_len, pwd_new_len;
int r;
log_dbg("Activating LUKS devices from headers.");
/* Never use real password for empty header processing */
if (rc->reencrypt_mode == REENCRYPT) {
pwd_old = rc->p[rc->keyslot].password;
pwd_old_len = rc->p[rc->keyslot].passwordLen;
pwd_new = pwd_old;
pwd_new_len = pwd_old_len;
} else if (rc->reencrypt_mode == DECRYPT) {
pwd_old = rc->p[rc->keyslot].password;
pwd_old_len = rc->p[rc->keyslot].passwordLen;
pwd_new = pwd_empty;
pwd_new_len = 0;
} else if (rc->reencrypt_mode == ENCRYPT) {
pwd_old = pwd_empty;
pwd_old_len = 0;
pwd_new = rc->p[rc->keyslot].password;
pwd_new_len = rc->p[rc->keyslot].passwordLen;
} else
return -EINVAL;
if ((r = crypt_init(&cd, rc->header_file_org)) ||
(r = crypt_load(cd, CRYPT_LUKS1, NULL)) ||
(r = crypt_set_data_device(cd, rc->device)))
goto out;
log_verbose(_("Activating temporary device using old LUKS header.\n"));
if ((r = crypt_activate_by_passphrase(cd, rc->header_file_org,
opt_key_slot, pwd_old, pwd_old_len,
CRYPT_ACTIVATE_READONLY|CRYPT_ACTIVATE_PRIVATE)) < 0)
goto out;
if ((r = crypt_init(&cd_new, rc->header_file_new)) ||
(r = crypt_load(cd_new, CRYPT_LUKS1, NULL)) ||
(r = crypt_set_data_device(cd_new, rc->device)))
goto out;
log_verbose(_("Activating temporary device using new LUKS header.\n"));
if ((r = crypt_activate_by_passphrase(cd_new, rc->header_file_new,
opt_key_slot, pwd_new, pwd_new_len,
CRYPT_ACTIVATE_SHARED|CRYPT_ACTIVATE_PRIVATE)) < 0)
goto out;
r = 0;
out:
crypt_free(cd);
crypt_free(cd_new);
if (r < 0)
log_err(_("Activation of temporary devices failed.\n"));
return r;
}
static int _remove_key( const char * device,const resolve_path_t * opts )
{
int slot ;
struct crypt_device * cd ;
const arguments * args = opts->args ;
if( zuluCryptVolumeIsNotLuks( device ) ){
return 1 ;
}
if( crypt_init( &cd,device ) != 0 ){
return 3 ;
}
if( crypt_load( cd,NULL,NULL ) != 0 ){
return zuluExit( 3,cd ) ;
}
slot = crypt_activate_by_passphrase( cd,NULL,CRYPT_ANY_SLOT,args->key,args->key_len,0 ) ;
if( slot < 0 ){
return zuluExit( 2,cd ) ;
}
if( crypt_keyslot_destroy( cd,slot ) < 0 ){
return zuluExit( 2,cd ) ;
}else{
return zuluExit( 0,cd ) ;
}
}
static int _restore_luks_header( const struct_opts * opts,const char * temp_path )
{
int st ;
struct crypt_device * cd ;
if( crypt_init( &cd,opts->device ) != 0 ){
st = 7 ;
}else{
if( crypt_load( cd,NULL,NULL ) != 0 ){
st = 2 ;
}else{
if( crypt_header_restore( cd,NULL,temp_path ) == 0 ){
st = 1 ;
}else{
st = 7 ;
}
}
crypt_free( cd ) ;
}
return st ;
}
static int _remove_key( const char * device ,const char * pass,size_t pass_size )
{
int slot ;
struct crypt_device * cd ;
if( zuluCryptVolumeIsNotLuks( device ) ){
return 1 ;
}
if( crypt_init( &cd,device ) != 0 ){
return 3 ;
}
if( crypt_load( cd,NULL,NULL ) != 0 ){
return zuluExit( 3,cd ) ;
}
slot = crypt_activate_by_passphrase( cd,NULL,CRYPT_ANY_SLOT,pass,pass_size,0 );
if ( slot < 0 ){
return zuluExit( 2,cd ) ;
}
if( crypt_keyslot_destroy( cd,slot ) < 0 ){
return zuluExit( 2,cd ) ;
}else{
return zuluExit( 0,cd ) ;
}
}
static int _open_plain( const char * device,const open_struct_t * opt )
{
uint32_t flags ;
struct crypt_device * cd ;
struct crypt_params_plain params ;
memset( ¶ms,'\0',sizeof( struct crypt_params_plain ) ) ;
params.hash = "ripemd160" ;
if( zuluCryptPathIsNotValid( device ) ){
return 3 ;
}
if( crypt_init( &cd,device ) != 0 ){
return 2 ;
}
params.offset = _offset( opt->offset ) ;
if( StringHasComponent( opt->m_opts,"ro" ) ){
flags = CRYPT_ACTIVATE_READONLY ;
}else{
flags = CRYPT_ACTIVATE_ALLOW_DISCARDS ;
}
if( crypt_format( cd,CRYPT_PLAIN,"aes","cbc-essiv:sha256",NULL,NULL,32,¶ms ) != 0 ){
return zuluExit( 2,cd ) ;
}
if( crypt_activate_by_passphrase( cd,opt->mapper_name,CRYPT_ANY_SLOT,
opt->key,opt->key_len,flags ) < 0 ){
return zuluExit( 2,cd ) ;
}else{
return zuluExit( 0,cd ) ;
}
}
static int _open_plain( const char * device,const char * mapper,const char * mode,const char * pass,size_t pass_size )
{
int flags ;
struct crypt_device * cd ;
struct crypt_params_plain params ;
memset( ¶ms,'\0',sizeof( struct crypt_params_plain ) ) ;
params.hash = "ripemd160";
params.skip = 0;
params.offset = 0;
if( zuluCryptPathIsNotValid( device ) ){
return 3 ;
}
if( StringHasComponent( mode,"ro" ) ){
flags = 1 ;
}else{
flags = 0 ;
}
if( crypt_init( &cd,device ) != 0 ){
return 2 ;
}
if( crypt_format( cd,CRYPT_PLAIN,"aes","cbc-essiv:sha256",NULL,NULL,32,¶ms ) != 0 ){
return zuluExit( 2,cd ) ;
}
if( crypt_activate_by_passphrase( cd,mapper,CRYPT_ANY_SLOT,pass,pass_size,flags ) < 0 ){
return zuluExit( 2,cd ) ;
}else{
return zuluExit( 0,cd ) ;
}
}
void lw_sha1 (char * output, const char * input, size_t length)
{
HCRYPTPROV hash_prov;
DWORD hash_length = 20;
crypt_init ();
CryptCreateHash (crypt_prov, CALG_SHA1, 0, 0, &hash_prov);
CryptHashData (hash_prov, (BYTE *) input, (DWORD) length, 0);
CryptGetHashParam (hash_prov, HP_HASHVAL, (BYTE *) output, &hash_length, 0);
CryptDestroyHash (hash_prov);
}
int initCryptDevice(struct crypt_device** cd, const char* filename)
{
int r;
if ((r = crypt_init(cd, filename)))
goto out;
return r;
out:
crypt_free(*cd);
return r;
}
lw_bool lw_random (char * buffer, size_t size)
{
if (!crypt_init ())
return lw_false;
if (size > 0xFFFFFFFF)
return lw_false;
if (!CryptGenRandom (crypt_prov, (DWORD) size, (PBYTE) buffer))
return lw_false;
return lw_true;
}
static int _open_plain( const char * device,const resolve_path_t * opts )
{
uint32_t flags ;
struct crypt_device * cd ;
struct crypt_params_plain params ;
size_t size ;
/*
* open_struct_t is defined in includes.h
*/
const open_struct_t * opt = opts->args ;
const args * e = opt->variables ;
memset( ¶ms,'\0',sizeof( struct crypt_params_plain ) ) ;
params.hash = e->hash ;
if( zuluCryptPathIsNotValid( device ) ){
return 3 ;
}
if( crypt_init( &cd,device ) != 0 ){
return 2 ;
}
params.offset = _offset( e->offset ) ;
if( opts->open_mode == O_RDONLY ){
flags = CRYPT_ACTIVATE_READONLY ;
}else{
flags = CRYPT_ACTIVATE_ALLOW_DISCARDS ;
}
size = ( size_t ) StringConvertToInt( e->keySize ) / 8 ;
if( crypt_format( cd,CRYPT_PLAIN,e->algo,e->cipher,NULL,NULL,size,¶ms ) != 0 ){
return zuluExit( 2,cd ) ;
}
if( crypt_activate_by_passphrase( cd,opt->mapper_name,CRYPT_ANY_SLOT,
opt->key,opt->key_len,flags ) < 0 ){
return zuluExit( 2,cd ) ;
}else{
return zuluExit( 0,cd ) ;
}
}
int main(void)
{
switch_t s;
chan_t c;
packet_t p;
path_t in;
int sock;
crypt_init();
s = switch_new(0);
if(util_loadjson(s) != 0 || (sock = util_server(0,1000)) <= 0)
{
printf("failed to startup %s or %s\n", strerror(errno), crypt_err());
return -1;
}
printf("loaded hashname %s\n",s->id->hexname);
// create/send a ping packet
c = chan_new(s, bucket_get(s->seeds, 0), "link", 0);
p = chan_packet(c);
chan_send(c, p);
util_sendall(s,sock);
in = path_new("ipv4");
while(util_readone(s, sock, in) == 0)
{
switch_loop(s);
while((c = switch_pop(s)))
{
printf("channel active %d %s %s\n",c->state,c->hexid,c->to->hexname);
if(util_cmp(c->type,"connect") == 0) ext_connect(c);
if(util_cmp(c->type,"link") == 0) ext_link(c);
if(util_cmp(c->type,"path") == 0) ext_path(c);
while((p = chan_pop(c)))
{
printf("unhandled channel packet %.*s\n", p->json_len, p->json);
packet_free(p);
}
if(c->state == ENDED) chan_free(c);
}
util_sendall(s,sock);
}
perror("exiting");
return 0;
}
static void remove_headers(struct reenc_ctx *rc)
{
struct crypt_device *cd = NULL;
log_dbg("Removing headers.");
if (crypt_init(&cd, NULL))
return;
crypt_set_log_callback(cd, _quiet_log, NULL);
if (*rc->header_file_org)
(void)crypt_deactivate(cd, rc->header_file_org);
if (*rc->header_file_new)
(void)crypt_deactivate(cd, rc->header_file_new);
crypt_free(cd);
}
struct crypt *crypt_HKDF_SHA256_new(void)
{
struct hkdf_priv *hk;
struct crypt *c;
c = crypt_init(sizeof(*hk));
c->c_destroy = hkdf_destroy;
c->c_set_key = hkdf_set_key;
c->c_extract = hkdf_extract;
c->c_expand = hkdf_expand;
hk = crypt_priv(c);
hk->hk_hmac = crypt_HMAC_SHA256_new();
return c;
}
int crypt_unlock(const char* path, const char* authtok, const char* name, int flags) {
int ret = -1;
struct crypt_device *cd = NULL;
if ((ret = crypt_init(&cd, path)) < 0)
fprintf(stderr, "pam_usermount: crypt_init() failed for '%s': %d\n", path, ret);
else {
if (crypt_status(cd, name) == CRYPT_ACTIVE)
fprintf(stderr, "pam_usermount: Device %s is already active\n", name);
else if ((ret = crypt_load(cd, CRYPT_LUKS1, NULL)) >= 0)
ret = crypt_activate_by_passphrase(cd, name, CRYPT_ANY_SLOT, authtok, strlen(authtok), flags);
crypt_free(cd);
}
return ret;
}
struct crypt *crypt_HMAC_SHA256_new(void)
{
struct hmac_priv *hp;
struct crypt *c;
c = crypt_init(sizeof(*hp));
c->c_destroy = hmac_destroy;
c->c_set_key = hmac_set_key;
c->c_mac = hmac_mac;
hp = crypt_priv(c);
HMAC_CTX_init(&hp->hp_ctx);
HMAC_Init_ex(&hp->hp_ctx, "a", 1, EVP_sha256(), NULL);
return c;
}
static int _is_luks( const char * dev,const resolve_path_t * opts )
{
struct crypt_device * cd ;
int st ;
if( opts ){;}
if( crypt_init( &cd,dev ) != 0 ){
return 0 ;
}
st = crypt_load( cd,NULL,NULL ) ;
crypt_free( cd ) ;
return st == 0 ;
}
static int _save_luks_header( const struct_opts * opts,const char * temp_path,const char * path,uid_t uid )
{
struct crypt_device * cd ;
int st ;
if( crypt_init( &cd,opts->device ) != 0 ){
st = 3 ;
}else{
st = crypt_header_backup( cd,NULL,temp_path ) ;
crypt_free( cd ) ;
if( st == 0 ){
st = _secure_copy_file( temp_path,path,uid ) ;
}else{
st = 4 ;
}
}
return st ;
}
static char * _empty_slots( const char * device,const resolve_path_t * opts )
{
struct crypt_device * cd;
int j ;
int k ;
const char * type ;
string_t p ;
if( opts ){;}
if( crypt_init( &cd,device ) != 0 ){
return zuluExit( NULL,NULL ) ;
}
if( crypt_load( cd,NULL,NULL ) != 0 ){
return zuluExit( NULL,cd ) ;
}
type = crypt_get_type( cd ) ;
if( type == NULL ){
return zuluExit( NULL,cd ) ;
}
k = crypt_keyslot_max( type ) ;
if( k < 0 ){
return zuluExit( NULL,cd ) ;
}
p = StringEmpty() ;
for( j = 0 ; j < k ; j++ ){
switch( crypt_keyslot_status( cd,j ) ){
case CRYPT_SLOT_INACTIVE : StringAppend( p,"0" ) ; break ;
case CRYPT_SLOT_ACTIVE : StringAppend( p,"1" ) ; break ;
case CRYPT_SLOT_INVALID : StringAppend( p,"2" ) ; break ;
case CRYPT_SLOT_ACTIVE_LAST: StringAppend( p,"3" ) ; break ;
default : ;
}
}
return zuluExit( StringDeleteHandle( &p ),cd ) ;
}
static int _add_key( const char * device,const char * existingkey,size_t existingkey_size,const char * newkey,size_t newkey_size )
{
struct crypt_device * cd ;
if( zuluCryptVolumeIsNotLuks( device ) ){
return 3 ;
}
if( crypt_init( &cd,device ) != 0 ){
return 2 ;
}
if( crypt_load( cd,NULL,NULL ) != 0 ){
return zuluExit( 2,cd ) ;
}
if( crypt_keyslot_add_by_passphrase( cd,CRYPT_ANY_SLOT,existingkey,existingkey_size,newkey,newkey_size ) < 0 ){
return zuluExit( 1,cd ) ;
}else{
return zuluExit( 0,cd ) ;
}
}
static int restore_luks_header(struct reenc_ctx *rc)
{
struct crypt_device *cd = NULL;
int r;
log_dbg("Restoring header for %s from %s.", rc->device, rc->header_file_new);
r = crypt_init(&cd, rc->device);
if (r == 0) {
crypt_set_confirm_callback(cd, NULL, NULL);
r = crypt_header_restore(cd, CRYPT_LUKS1, rc->header_file_new);
}
crypt_free(cd);
if (r)
log_err(_("Cannot restore LUKS header on device %s.\n"), rc->device);
else
log_verbose(_("LUKS header on device %s restored.\n"), rc->device);
return r;
}
static int
crypt_init_arcfour128(LIBSSH2_SESSION * session,
const LIBSSH2_CRYPT_METHOD * method,
unsigned char *iv, int *free_iv,
unsigned char *secret, int *free_secret,
int encrypt, void **abstract)
{
int rc;
rc = crypt_init (session, method, iv, free_iv, secret, free_secret,
encrypt, abstract);
if (rc == 0) {
struct crypt_ctx *cctx = *(struct crypt_ctx **) abstract;
unsigned char block[8];
size_t discard = 1536;
for (; discard; discard -= 8)
_libssh2_cipher_crypt(&cctx->h, cctx->algo, cctx->encrypt, block);
}
return rc;
}
int main()
{
void *aesctx;
char *s = "hello,world!";
char *r,*t;
int len;
aesctx = crypt_init(CRYPT_PWD_FILE,CRYPT_PWD_LEN16);
if(!aesctx) {
printf("call crypt_init() error.\n");
return 1;
}
r = crypt_encode(aesctx,s,strlen(s),&len);
t = crypt_decode(aesctx,r,len,&len);
printf("%s\n",t);
xfree(r);
xfree(t);
crypt_free(aesctx);
return 0;
}
/*
* 1 is returned if a volume is a truecrypt volume.
* 0 is returned if a volume is not a truecrypt volume or functionality is not supported
*/
int zuluCryptVolumeIsTcrypt( const char * device,const char * key,int key_source )
{
struct crypt_device * cd = NULL;
struct crypt_params_tcrypt params ;
memset( ¶ms,'\0',sizeof( struct crypt_params_tcrypt ) ) ;
if( key_source ){;}
if( crypt_init( &cd,device ) < 0 ){
return 0 ;
}else{
params.passphrase = key ;
params.passphrase_size = StringSize( key ) ;
params.flags = CRYPT_TCRYPT_LEGACY_MODES ;
if( crypt_load( cd,CRYPT_TCRYPT,¶ms ) == 0 ){
return zuluExit( 1,cd ) ;
}else{
return zuluExit( 0,cd ) ;
}
}
}
static int _open_luks_2( const char * device,const resolve_path_t * opt )
{
struct crypt_device * cd ;
uint32_t flags ;
int st ;
/*
* open_struct_t is defined in includes.h
*/
const open_struct_t * opts = opt->args ;
if( zuluCryptPathIsNotValid( device ) ){
return 3 ;
}
if( crypt_init( &cd,device ) != 0 ){
return 2 ;
}
if( crypt_load( cd,NULL,NULL ) != 0 ){
return zuluExit( 2,cd ) ;
}
if( opt->open_mode == O_RDONLY ){
flags = CRYPT_ACTIVATE_READONLY ;
}else{
flags = CRYPT_ACTIVATE_ALLOW_DISCARDS ;
}
st = crypt_activate_by_passphrase( cd,opts->mapper_name,CRYPT_ANY_SLOT,
opts->key,opts->key_len,flags ) ;
if( st >= 0 ){
return zuluExit( 0,cd ) ;
}else if( st == -1 ){
return zuluExit( 1,cd ) ;
}else{
return zuluExit( 2,cd ) ;
}
}
static int create_new_header(struct reenc_ctx *rc, const char *cipher,
const char *cipher_mode, const char *uuid,
const char *key, int key_size,
struct crypt_params_luks1 *params)
{
struct crypt_device *cd_new = NULL;
int i, r;
if ((r = crypt_init(&cd_new, rc->header_file_new)))
goto out;
if (opt_random)
crypt_set_rng_type(cd_new, CRYPT_RNG_RANDOM);
else if (opt_urandom)
crypt_set_rng_type(cd_new, CRYPT_RNG_URANDOM);
if (opt_iteration_time)
crypt_set_iteration_time(cd_new, opt_iteration_time);
if ((r = crypt_format(cd_new, CRYPT_LUKS1, cipher, cipher_mode,
uuid, key, key_size, params)))
goto out;
log_verbose(_("New LUKS header for device %s created.\n"), rc->device);
for (i = 0; i < MAX_SLOT; i++) {
if (!rc->p[i].password)
continue;
if ((r = crypt_keyslot_add_by_volume_key(cd_new, i,
NULL, 0, rc->p[i].password, rc->p[i].passwordLen)) < 0)
goto out;
log_verbose(_("Activated keyslot %i.\n"), r);
r = 0;
}
out:
crypt_free(cd_new);
return r;
}
int
main(int argc, char *argv[])
{
struct crypt_device *cd = NULL;
struct options opts = {};
const char *type = NULL;
int nerr = 0;
if (argp_parse(&argp, argc, argv, 0, NULL, &opts) != 0)
return EX_OSERR;
if (strlen(opts.params.hostname) == 0) {
for (int slot = 0; slot < LUKS_NUMKEYS; slot++) {
TANG_LUKS *tl = NULL;
sbuf_t *buf = NULL;
buf = meta_read(opts.device, slot);
if (!buf)
continue;
tl = TANG_LUKS_from_sbuf(buf);
sbuf_free(buf);
if (!tl)
continue;
fwrite(tl->hostname->data, tl->hostname->length, 1, stderr);
fwrite(":", 1, 1, stderr);
fwrite(tl->service->data, tl->service->length, 1, stderr);
fwrite("\n", 1, 1, stderr);
TANG_LUKS_free(tl);
}
return 0;
}
nerr = crypt_init(&cd, opts.device);
if (nerr != 0) {
fprintf(stderr, "Unable to open device (%s): %s\n",
opts.device, strerror(-nerr));
goto error;
}
nerr = crypt_load(cd, NULL, NULL);
if (nerr != 0) {
fprintf(stderr, "Unable to load device (%s): %s\n",
opts.device, strerror(-nerr));
goto error;
}
type = crypt_get_type(cd);
if (type == NULL) {
fprintf(stderr, "Unable to determine device type\n");
goto error;
}
if (strcmp(type, CRYPT_LUKS1) != 0) {
fprintf(stderr, "%s (%s) is not a LUKS device\n", opts.device, type);
goto error;
}
for (int slot = 0; slot < crypt_keyslot_max(CRYPT_LUKS1); slot++) {
TANG_LUKS *tl = NULL;
sbuf_t *buf = NULL;
switch (crypt_keyslot_status(cd, slot)) {
case CRYPT_SLOT_ACTIVE:
case CRYPT_SLOT_ACTIVE_LAST:
buf = meta_read(opts.device, slot);
if (!buf)
continue;
tl = TANG_LUKS_from_sbuf(buf);
sbuf_free(buf);
if (!tl)
continue;
if (strncmp((char *) tl->hostname->data, opts.params.hostname,
tl->hostname->length) != 0) {
TANG_LUKS_free(tl);
continue;
}
if (strncmp((char *) tl->service->data, opts.params.service,
tl->service->length) != 0) {
TANG_LUKS_free(tl);
continue;
}
TANG_LUKS_free(tl);
if (crypt_keyslot_destroy(cd, slot) == 0)
meta_erase(opts.device, slot);
break;
default:
break;
}
}
crypt_free(cd);
return 0;
error:
crypt_free(cd);
return EX_IOERR;
}
static int format_and_add_keyslots(const char *path)
{
struct crypt_device *cd;
struct crypt_params_luks1 params;
int r;
/*
* crypt_init() call precedes most of operations of cryptsetup API. The call is used
* to initialize crypt device context stored in structure referenced by _cd_ in
* the example. Second parameter is used to pass underlaying device path.
*
* Note:
* If path refers to a regular file it'll be attached to a first free loop device.
* crypt_init() operation fails in case there's no more loop device available.
* Also, loop device will have the AUTOCLEAR flag set, so the file loopback will
* be detached automatically.
*/
r = crypt_init(&cd, path);
if (r < 0 ) {
printf("crypt_init() failed for %s.\n", path);
return r;
}
printf("Context is attached to block device %s.\n", crypt_get_device_name(cd));
/*
* So far no data were written on your device. This will change with call of
* crypt_format() only if you specify CRYPT_LUKS1 as device type.
*/
printf("Device %s will be formatted to LUKS device after 5 seconds.\n"
"Press CTRL+C now if you want to cancel this operation.\n", path);
sleep(5);
/*
* Prepare LUKS format parameters
*
* hash parameter defines PBKDF2 hash algorithm used in LUKS header.
* For compatibility reason we use SHA1 here.
*/
params.hash = "sha1";
/*
* data_alignment parameter is relevant only in case of the luks header
* and the payload are both stored on same device.
*
* if you set data_alignment = 0, cryptsetup will autodetect
* data_alignment according to underlaying device topology.
*/
params.data_alignment = 0;
/*
* data_device parameter defines that no external device
* for luks header will be used
*/
params.data_device = NULL;
/*
* NULLs for uuid and volume_key means that these attributes will be
* generated during crypt_format(). Volume key is generated with respect
* to key size parameter passed to function.
*
* crypt_format() checks device size (LUKS header must fit there).
*/
r = crypt_format(cd, /* crypt context */
CRYPT_LUKS1, /* LUKS1 is standard LUKS header */
"aes", /* used cipher */
"xts-plain64", /* used block mode and IV generator*/
NULL, /* generate UUID */
NULL, /* generate volume key from RNG */
256 / 8, /* 256bit key - here AES-128 in XTS mode, size is in bytes */
¶ms); /* parameters above */
if(r < 0) {
printf("crypt_format() failed on device %s\n", crypt_get_device_name(cd));
crypt_free(cd);
return r;
}
/*
* The device now contains LUKS1 header, but there is
* no active keyslot with encrypted volume key yet.
*/
/*
* cryptt_kesylot_add_* call stores volume_key in encrypted form into keyslot.
* Without keyslot you can't manipulate with LUKS device after the context will be freed.
*
* To create a new keyslot you need to supply the existing one (to get the volume key from) or
* you need to supply the volume key.
*
* After format, we have volume key stored internally in context so add new keyslot
* using this internal volume key.
*/
r = crypt_keyslot_add_by_volume_key(cd, /* crypt context */
CRYPT_ANY_SLOT, /* just use first free slot */
NULL, /* use internal volume key */
0, /* unused (size of volume key) */
"foo", /* passphrase - NULL means query*/
3); /* size of passphrase */
if (r < 0) {
printf("Adding keyslot failed.\n");
crypt_free(cd);
return r;
}
printf("The first keyslot is initialized.\n");
/*
* Add another keyslot, now using the first keyslot.
* It will decrypt volume key from the first keyslot and creates new one with another passphrase.
*/
r = crypt_keyslot_add_by_passphrase(cd, /* crypt context */
CRYPT_ANY_SLOT, /* just use first free slot */
"foo", 3, /* passphrase for the old keyslot */
"bar", 3); /* passphrase for the new kesylot */
if (r < 0) {
printf("Adding keyslot failed.\n");
crypt_free(cd);
return r;
}
printf("The second keyslot is initialized.\n");
crypt_free(cd);
return 0;
}
static int activate_and_check_status(const char *path, const char *device_name)
{
struct crypt_device *cd;
struct crypt_active_device cad;
int r;
/*
* LUKS device activation example.
* It's sequence of sub-steps: device initialization, LUKS header load
* and the device activation itself.
*/
r = crypt_init(&cd, path);
if (r < 0 ) {
printf("crypt_init() failed for %s.\n", path);
return r;
}
/*
* crypt_load() is used to load the LUKS header from block device
* into crypt_device context.
*/
r = crypt_load(cd, /* crypt context */
CRYPT_LUKS1, /* requested type */
NULL); /* additional parameters (not used) */
if (r < 0) {
printf("crypt_load() failed on device %s.\n", crypt_get_device_name(cd));
crypt_free(cd);
return r;
}
/*
* Device activation creates device-mapper devie mapping with name device_name.
*/
r = crypt_activate_by_passphrase(cd, /* crypt context */
device_name, /* device name to activate */
CRYPT_ANY_SLOT,/* which slot use (ANY - try all) */
"foo", 3, /* passphrase */
CRYPT_ACTIVATE_READONLY); /* flags */
if (r < 0) {
printf("Device %s activation failed.\n", device_name);
crypt_free(cd);
return r;
}
printf("LUKS device %s/%s is active.\n", crypt_get_dir(), device_name);
printf("\tcipher used: %s\n", crypt_get_cipher(cd));
printf("\tcipher mode: %s\n", crypt_get_cipher_mode(cd));
printf("\tdevice UUID: %s\n", crypt_get_uuid(cd));
/*
* Get info about active device (query DM backend)
*/
r = crypt_get_active_device(cd, device_name, &cad);
if (r < 0) {
printf("Get info about active device %s failed.\n", device_name);
crypt_deactivate(cd, device_name);
crypt_free(cd);
return r;
}
printf("Active device parameters for %s:\n"
"\tDevice offset (in sectors): %" PRIu64 "\n"
"\tIV offset (in sectors) : %" PRIu64 "\n"
"\tdevice size (in sectors) : %" PRIu64 "\n"
"\tread-only flag : %s\n",
device_name, cad.offset, cad.iv_offset, cad.size,
cad.flags & CRYPT_ACTIVATE_READONLY ? "1" : "0");
crypt_free(cd);
return 0;
}
static int action_format(int arg)
{
struct crypt_device *cd = NULL;
struct crypt_params_integrity params = {
.journal_size = opt_journal_size,
.interleave_sectors = opt_interleave_sectors,
/* in bitmap mode we have to overload these values... */
.journal_watermark = opt_integrity_bitmap ? opt_bitmap_sectors_per_bit : opt_journal_watermark,
.journal_commit_time = opt_integrity_bitmap ? opt_bitmap_flush_time : opt_journal_commit_time,
.buffer_sectors = opt_buffer_sectors,
.tag_size = opt_tag_size,
.sector_size = opt_sector_size ?: SECTOR_SIZE,
};
char integrity[MAX_CIPHER_LEN], journal_integrity[MAX_CIPHER_LEN], journal_crypt[MAX_CIPHER_LEN];
char *integrity_key = NULL, *msg = NULL;
int r;
size_t signatures;
if (opt_integrity) {
r = crypt_parse_hash_integrity_mode(opt_integrity, integrity);
if (r < 0) {
log_err(_("No known integrity specification pattern detected."));
return r;
}
params.integrity = integrity;
}
if (opt_journal_integrity) {
r = crypt_parse_hash_integrity_mode(opt_journal_integrity, journal_integrity);
if (r < 0) {
log_err(_("No known integrity specification pattern detected."));
return r;
}
params.journal_integrity = journal_integrity;
}
if (opt_journal_crypt) {
r = crypt_parse_hash_integrity_mode(opt_journal_crypt, journal_crypt);
if (r < 0) {
log_err(_("No known integrity specification pattern detected."));
return r;
}
params.journal_crypt = journal_crypt;
}
r = _read_keys(&integrity_key, ¶ms);
if (r)
goto out;
r = crypt_init_data_device(&cd, action_argv[0], opt_data_device);
if (r < 0)
goto out;
r = asprintf(&msg, _("This will overwrite data on %s irrevocably."), action_argv[0]);
if (r == -1) {
r = -ENOMEM;
goto out;
}
r = yesDialog(msg, _("Operation aborted.\n")) ? 0 : -EINVAL;
free(msg);
if (r < 0)
goto out;
r = tools_detect_signatures(action_argv[0], 0, &signatures);
if (r < 0)
goto out;
/* Signature candidates found */
if (signatures && ((r = tools_wipe_all_signatures(action_argv[0])) < 0))
goto out;
r = crypt_format(cd, CRYPT_INTEGRITY, NULL, NULL, NULL, NULL, 0, ¶ms);
if (r < 0) /* FIXME: call wipe signatures again */
goto out;
if (!opt_batch_mode)
log_std(_("Formatted with tag size %u, internal integrity %s.\n"), opt_tag_size, opt_integrity);
if (!opt_no_wipe)
r = _wipe_data_device(cd, integrity_key);
out:
crypt_safe_free(integrity_key);
crypt_safe_free(CONST_CAST(void*)params.journal_integrity_key);
crypt_safe_free(CONST_CAST(void*)params.journal_crypt_key);
crypt_free(cd);
return r;
}
static int action_open(int arg)
{
struct crypt_device *cd = NULL;
struct crypt_params_integrity params = {
/* in bitmap mode we have to overload these values... */
.journal_watermark = opt_integrity_bitmap ? opt_bitmap_sectors_per_bit : opt_journal_watermark,
.journal_commit_time = opt_integrity_bitmap ? opt_bitmap_flush_time : opt_journal_commit_time,
.buffer_sectors = opt_buffer_sectors,
};
uint32_t activate_flags = 0;
char integrity[MAX_CIPHER_LEN], journal_integrity[MAX_CIPHER_LEN], journal_crypt[MAX_CIPHER_LEN];
char *integrity_key = NULL;
int r;
if (opt_integrity) {
r = crypt_parse_hash_integrity_mode(opt_integrity, integrity);
if (r < 0) {
log_err(_("No known integrity specification pattern detected."));
return r;
}
params.integrity = integrity;
}
if (opt_journal_integrity) {
r = crypt_parse_hash_integrity_mode(opt_journal_integrity, journal_integrity);
if (r < 0) {
log_err(_("No known integrity specification pattern detected."));
return r;
}
params.journal_integrity = journal_integrity;
}
if (opt_journal_crypt) {
r = crypt_parse_hash_integrity_mode(opt_journal_crypt, journal_crypt);
if (r < 0) {
log_err(_("No known integrity specification pattern detected."));
return r;
}
params.journal_crypt = journal_crypt;
}
if (opt_integrity_nojournal || opt_integrity_bitmap)
activate_flags |= CRYPT_ACTIVATE_NO_JOURNAL;
if (opt_integrity_recovery)
activate_flags |= CRYPT_ACTIVATE_RECOVERY;
if (opt_integrity_bitmap)
activate_flags |= CRYPT_ACTIVATE_NO_JOURNAL_BITMAP;
if (opt_integrity_recalculate)
activate_flags |= CRYPT_ACTIVATE_RECALCULATE;
r = _read_keys(&integrity_key, ¶ms);
if (r)
goto out;
if ((r = crypt_init_data_device(&cd, action_argv[0], opt_data_device)))
goto out;
r = crypt_load(cd, CRYPT_INTEGRITY, ¶ms);
if (r)
goto out;
r = crypt_activate_by_volume_key(cd, action_argv[1], integrity_key,
opt_integrity_key_size, activate_flags);
out:
crypt_safe_free(integrity_key);
crypt_safe_free(CONST_CAST(void*)params.journal_integrity_key);
crypt_safe_free(CONST_CAST(void*)params.journal_crypt_key);
crypt_free(cd);
return r;
}
static int action_close(int arg)
{
struct crypt_device *cd = NULL;
int r;
r = crypt_init_by_name(&cd, action_argv[0]);
if (r == 0)
r = crypt_deactivate(cd, action_argv[0]);
crypt_free(cd);
return r;
}
static int action_status(int arg)
{
crypt_status_info ci;
struct crypt_active_device cad;
struct crypt_params_integrity ip = {};
struct crypt_device *cd = NULL;
char *backing_file;
const char *device, *metadata_device;
int path = 0, r = 0;
/* perhaps a path, not a dm device name */
if (strchr(action_argv[0], '/'))
path = 1;
ci = crypt_status(NULL, action_argv[0]);
switch (ci) {
case CRYPT_INVALID:
r = -EINVAL;
break;
case CRYPT_INACTIVE:
if (path)
log_std("%s is inactive.\n", action_argv[0]);
else
log_std("%s/%s is inactive.\n", crypt_get_dir(), action_argv[0]);
r = -ENODEV;
break;
case CRYPT_ACTIVE:
case CRYPT_BUSY:
if (path)
log_std("%s is active%s.\n", action_argv[0],
ci == CRYPT_BUSY ? " and is in use" : "");
else
log_std("%s/%s is active%s.\n", crypt_get_dir(), action_argv[0],
ci == CRYPT_BUSY ? " and is in use" : "");
r = crypt_init_by_name_and_header(&cd, action_argv[0], NULL);
if (r < 0)
goto out;
log_std(" type: %s\n", crypt_get_type(cd) ?: "n/a");
r = crypt_get_active_device(cd, action_argv[0], &cad);
if (r < 0)
goto out;
r = crypt_get_integrity_info(cd, &ip);
if (r < 0)
goto out;
log_std(" tag size: %u\n", ip.tag_size);
log_std(" integrity: %s\n", ip.integrity ?: "(none)");
device = crypt_get_device_name(cd);
metadata_device = crypt_get_metadata_device_name(cd);
log_std(" device: %s%s\n", device, metadata_device ? " (detached)" : "");
if (crypt_loop_device(device)) {
backing_file = crypt_loop_backing_file(device);
log_std(" loop: %s\n", backing_file);
free(backing_file);
}
if (metadata_device) {
log_std(" metadata device: %s\n", metadata_device);
if (crypt_loop_device(metadata_device)) {
backing_file = crypt_loop_backing_file(metadata_device);
log_std(" loop: %s\n", backing_file);
free(backing_file);
}
}
log_std(" sector size: %u bytes\n", crypt_get_sector_size(cd));
log_std(" interleave sectors: %u\n", ip.interleave_sectors);
log_std(" size: %" PRIu64 " sectors\n", cad.size);
log_std(" mode: %s%s\n",
cad.flags & CRYPT_ACTIVATE_READONLY ? "readonly" : "read/write",
cad.flags & CRYPT_ACTIVATE_RECOVERY ? " recovery" : "");
log_std(" failures: %" PRIu64 "\n",
crypt_get_active_integrity_failures(cd, action_argv[0]));
if (cad.flags & CRYPT_ACTIVATE_NO_JOURNAL_BITMAP) {
log_std(" bitmap 512-byte sectors per bit: %u\n", ip.journal_watermark);
log_std(" bitmap flush interval: %u ms\n", ip.journal_commit_time);
} if (cad.flags & CRYPT_ACTIVATE_NO_JOURNAL) {
log_std(" journal: not active\n");
} else {
log_std(" journal size: %" PRIu64 " bytes\n", ip.journal_size);
log_std(" journal watermark: %u%%\n", ip.journal_watermark);
log_std(" journal commit time: %u ms\n", ip.journal_commit_time);
if (ip.journal_integrity)
log_std(" journal integrity MAC: %s\n", ip.journal_integrity);
if (ip.journal_crypt)
log_std(" journal encryption: %s\n", ip.journal_crypt);
}
}
out:
crypt_free(cd);
if (r == -ENOTSUP)
r = 0;
return r;
return -EINVAL;
}
static int action_dump(int arg)
{
struct crypt_device *cd = NULL;
struct crypt_params_integrity params = {};
int r;
if ((r = crypt_init(&cd, action_argv[0])))
return r;
r = crypt_load(cd, CRYPT_INTEGRITY, ¶ms);
if (!r)
crypt_dump(cd);
crypt_free(cd);
return r;
}
static struct action_type {
const char *type;
int (*handler)(int);
int required_action_argc;
const char *arg_desc;
const char *desc;
} action_types[] = {
{ "format", action_format, 1, N_("<integrity_device>"),N_("format device") },
{ "open", action_open, 2, N_("<integrity_device> <name>"),N_("open device as <name>") },
{ "close", action_close, 1, N_("<name>"),N_("close device (deactivate and remove mapping)") },
{ "status", action_status, 1, N_("<name>"),N_("show active device status") },
{ "dump", action_dump, 1, N_("<integrity_device>"),N_("show on-disk information") },
{ NULL, NULL, 0, NULL, NULL }
};
static void help(poptContext popt_context,
enum poptCallbackReason reason __attribute__((unused)),
struct poptOption *key,
const char *arg __attribute__((unused)),
void *data __attribute__((unused)))
{
struct action_type *action;
if (key->shortName == '?') {
log_std("%s %s\n", PACKAGE_INTEGRITY, PACKAGE_VERSION);
poptPrintHelp(popt_context, stdout, 0);
log_std(_("\n"
"<action> is one of:\n"));
for(action = action_types; action->type; action++)
log_std("\t%s %s - %s\n", action->type, _(action->arg_desc), _(action->desc));
log_std(_("\n"
"<name> is the device to create under %s\n"
"<integrity_device> is the device containing data with integrity tags\n"),
crypt_get_dir());
log_std(_("\nDefault compiled-in dm-integrity parameters:\n"
"\tTag size: %u bytes, Checksum algorithm: %s\n"),
DEFAULT_TAG_SIZE, DEFAULT_ALG_NAME);
exit(EXIT_SUCCESS);
} else
usage(popt_context, EXIT_SUCCESS, NULL, NULL);
}
static int run_action(struct action_type *action)
{
int r;
log_dbg("Running command %s.", action->type);
r = action->handler(0);
show_status(r);
return translate_errno(r);
}
/* Create fake header for original device */
static int backup_fake_header(struct reenc_ctx *rc)
{
struct crypt_device *cd_new = NULL;
struct crypt_params_luks1 params = {0};
char cipher [MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN];
const char *header_file_fake;
int r;
log_dbg("Creating fake (cipher_null) header for %s device.",
(rc->reencrypt_mode == DECRYPT) ? "new" : "original");
header_file_fake = (rc->reencrypt_mode == DECRYPT) ? rc->header_file_new : rc->header_file_org;
if (!opt_key_size)
opt_key_size = DEFAULT_LUKS1_KEYBITS;
if (opt_cipher) {
r = crypt_parse_name_and_mode(opt_cipher, cipher, NULL, cipher_mode);
if (r < 0) {
log_err(_("No known cipher specification pattern detected.\n"));
goto out;
}
}
r = create_empty_header(header_file_fake, NULL, MAX_BCK_SECTORS);
if (r < 0)
return r;
params.hash = opt_hash ?: DEFAULT_LUKS1_HASH;
params.data_alignment = 0;
params.data_device = rc->device;
r = crypt_init(&cd_new, header_file_fake);
if (r < 0)
return r;
r = crypt_format(cd_new, CRYPT_LUKS1, "cipher_null", "ecb",
NO_UUID, NULL, opt_key_size / 8, ¶ms);
if (r < 0)
goto out;
r = crypt_keyslot_add_by_volume_key(cd_new, rc->keyslot, NULL, 0,
rc->p[rc->keyslot].password, rc->p[rc->keyslot].passwordLen);
if (r < 0)
goto out;
/* The real header is backup header created in backup_luks_headers() */
if (rc->reencrypt_mode == DECRYPT)
goto out;
r = create_empty_header(rc->header_file_new, rc->header_file_org, 0);
if (r < 0)
goto out;
params.data_alignment = ROUND_SECTOR(opt_reduce_size);
r = create_new_header(rc,
opt_cipher ? cipher : DEFAULT_LUKS1_CIPHER,
opt_cipher ? cipher_mode : DEFAULT_LUKS1_MODE,
NULL, NULL,
(opt_key_size ? opt_key_size : DEFAULT_LUKS1_KEYBITS) / 8,
¶ms);
out:
crypt_free(cd_new);
return r;
}