vbatts/grub
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Integrate geli into autoconfiguration system

Browse source
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-04-25 14:52:07 +02:00
parent d7bdab32b8
commit 20a409405b
13 changed files with 835 additions and 682 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

210
grub-core/disk/cryptodisk.c
View file

@ -20,6 +20,8 @@
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/dl.h>
#include <grub/extcmd.h>
#include <grub/i18n.h>
#ifdef GRUB_UTIL
#include <errno.h>
@ -33,6 +35,16 @@
GRUB_MOD_LICENSE ("GPLv3+");
grub_cryptodisk_dev_t grub_cryptodisk_list;
static const struct grub_arg_option options[] =
{
{"uuid", 'u', 0, N_("Mount by UUID."), 0, 0},
{"all", 'a', 0, N_("Mount all."), 0, 0},
{"boot", 'b', 0, N_("Mount all volumes marked as boot."), 0, 0},
{0, 0, 0, 0, 0, 0}
};
/* Our irreducible polynom is x^128+x^7+x^2+x+1. Lowest byte of it is: */
#define GF_POLYNOM 0x87
static inline int GF_PER_SECTOR (const struct grub_cryptodisk *dev)
@ -480,7 +492,7 @@ grub_cryptodisk_close (grub_disk_t disk)
static grub_err_t
grub_cryptodisk_read (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, char *buf)
grub_size_t size, char *buf)
{
grub_cryptodisk_t dev = (grub_cryptodisk_t) disk->data;
grub_err_t err;
@ -635,7 +647,7 @@ grub_util_cryptodisk_print_abstraction (grub_disk_t disk)
{
grub_cryptodisk_t dev = (grub_cryptodisk_t) disk->data;
grub_printf ("luks ");
grub_printf ("cryptodisk %s ", dev->modname);
if (dev->cipher)
grub_printf ("%s ", dev->cipher->cipher->modname);
@ -650,8 +662,197 @@ grub_util_cryptodisk_print_abstraction (grub_disk_t disk)
if (dev->iv_hash)
grub_printf ("%s ", dev->iv_hash->modname);
}
void
grub_util_cryptodisk_print_uuid (grub_disk_t disk)
{
grub_cryptodisk_t dev = (grub_cryptodisk_t) disk->data;
grub_printf ("%s ", dev->uuid);
}
#endif
static int check_boot, have_it;
static char *search_uuid;
static void
cryptodisk_close (grub_cryptodisk_t dev)
{
grub_crypto_cipher_close (dev->cipher);
grub_crypto_cipher_close (dev->secondary_cipher);
grub_crypto_cipher_close (dev->essiv_cipher);
grub_free (dev);
}
static grub_err_t
grub_cryptodisk_scan_device_real (const char *name, grub_disk_t source)
{
grub_err_t err;
grub_cryptodisk_t dev;
grub_cryptodisk_dev_t cr;
dev = grub_cryptodisk_get_by_source_disk (source);
if (dev)
return GRUB_ERR_NONE;
FOR_CRYPTODISK_DEVS (cr)
{
dev = cr->scan (source, search_uuid, check_boot);
if (grub_errno)
return grub_errno;
if (!dev)
continue;
err = cr->recover_key (source, dev);
if (err)
{
cryptodisk_close (dev);
return err;
}
grub_cryptodisk_insert (dev, name, source);
have_it = 1;
return GRUB_ERR_NONE;
}
return GRUB_ERR_NONE;
}
#ifdef GRUB_UTIL
#include <grub/util/misc.h>
grub_err_t
grub_cryptodisk_cheat_mount (const char *sourcedev, const char *cheat)
{
grub_err_t err;
grub_cryptodisk_t dev;
grub_cryptodisk_dev_t cr;
grub_disk_t source;
/* Try to open disk. */
source = grub_disk_open (sourcedev);
if (!source)
return grub_errno;
dev = grub_cryptodisk_get_by_source_disk (source);
if (dev)
{
grub_disk_close (source);
return GRUB_ERR_NONE;
}
FOR_CRYPTODISK_DEVS (cr)
{
dev = cr->scan (source, search_uuid, check_boot);
if (grub_errno)
return grub_errno;
if (!dev)
continue;
grub_util_info ("cheatmounted %s (%s) at %s", sourcedev, dev->modname,
cheat);
err = grub_cryptodisk_cheat_insert (dev, sourcedev, source, cheat);
grub_disk_close (source);
if (err)
grub_free (dev);
return GRUB_ERR_NONE;
}
grub_disk_close (source);
return GRUB_ERR_NONE;
}
#endif
static int
grub_cryptodisk_scan_device (const char *name)
{
grub_err_t err;
grub_disk_t source;
/* Try to open disk. */
source = grub_disk_open (name);
if (!source)
return grub_errno;
err = grub_cryptodisk_scan_device_real (name, source);
grub_disk_close (source);
if (err)
grub_print_error ();
return have_it && search_uuid ? 1 : 0;
}
static grub_err_t
grub_cmd_cryptomount (grub_extcmd_context_t ctxt, int argc, char **args)
{
struct grub_arg_list *state = ctxt->state;
if (argc < 1 && !state[1].set && !state[2].set)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "device name required");
have_it = 0;
if (state[0].set)
{
grub_cryptodisk_t dev;
dev = grub_cryptodisk_get_by_uuid (args[0]);
if (dev)
{
grub_dprintf ("cryptodisk",
"already mounted as crypto%lu\n", dev->id);
return GRUB_ERR_NONE;
}
check_boot = state[2].set;
search_uuid = args[0];
grub_device_iterate (&grub_cryptodisk_scan_device);
search_uuid = NULL;
if (!have_it)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no such cryptodisk found");
return GRUB_ERR_NONE;
}
else if (state[1].set || (argc == 0 && state[2].set))
{
search_uuid = NULL;
check_boot = state[2].set;
grub_device_iterate (&grub_cryptodisk_scan_device);
search_uuid = NULL;
return GRUB_ERR_NONE;
}
else
{
grub_err_t err;
grub_disk_t disk;
grub_cryptodisk_t dev;
search_uuid = NULL;
check_boot = state[2].set;
disk = grub_disk_open (args[0]);
if (!disk)
return grub_errno;
dev = grub_cryptodisk_get_by_source_disk (disk);
if (dev)
{
grub_dprintf ("cryptodisk", "already mounted as crypto%lu\n", dev->id);
grub_disk_close (disk);
return GRUB_ERR_NONE;
}
err = grub_cryptodisk_scan_device_real (args[0], disk);
grub_disk_close (disk);
return err;
}
}
static struct grub_disk_dev grub_cryptodisk_dev = {
.name = "cryptodisk",
.id = GRUB_DISK_DEVICE_CRYPTODISK_ID,
@ -666,9 +867,14 @@ static struct grub_disk_dev grub_cryptodisk_dev = {
.next = 0
};
static grub_extcmd_t cmd;
GRUB_MOD_INIT (cryptodisk)
{
grub_disk_dev_register (&grub_cryptodisk_dev);
cmd = grub_register_extcmd ("cryptomount", grub_cmd_cryptomount, 0,
N_("SOURCE|-u UUID|-a|-b"),
N_("Mount a crypto device."), options);
}
GRUB_MOD_FINI (cryptodisk)

464
grub-core/disk/geli.c
View file

@ -53,7 +53,7 @@
#include <grub/err.h>
#include <grub/disk.h>
#include <grub/crypto.h>
#include <grub/extcmd.h>
#include <grub/partition.h>
#include <grub/i18n.h>
GRUB_MOD_LICENSE ("GPLv3+");
@ -105,17 +105,6 @@ const char *algorithms[] = {
#define MAX_PASSPHRASE 256
static const struct grub_arg_option options[] =
{
{"uuid", 'u', 0, N_("Mount by UUID."), 0, 0},
{"all", 'a', 0, N_("Mount all."), 0, 0},
{"boot", 'b', 0, N_("Mount all volumes marked as boot."), 0, 0},
{0, 0, 0, 0, 0, 0}
};
static int check_uuid, check_boot, have_it;
static char *search_uuid;
static gcry_err_code_t
geli_rekey (struct grub_cryptodisk *dev, grub_uint64_t zoneno)
{
@ -150,56 +139,21 @@ ascii2hex (char c)
return 0;
}
static grub_cryptodisk_t
configure_ciphers (const struct grub_geli_phdr *header)
static inline gcry_err_code_t
make_uuid (const struct grub_geli_phdr *header,
char *uuid)
{
grub_cryptodisk_t newdev;
grub_crypto_cipher_handle_t cipher = NULL, secondary_cipher = NULL;
const struct gcry_cipher_spec *ciph;
const char *ciphername = NULL;
char uuid[GRUB_MD_SHA256->mdlen * 2 + 1];
grub_uint8_t uuidbin[GRUB_MD_SHA256->mdlen];
gcry_err_code_t err;
grub_uint8_t *iptr;
char *optr;
gcry_err_code_t gcry_err;
/* Look for GELI magic sequence. */
if (grub_memcmp (header->magic, GELI_MAGIC, sizeof (GELI_MAGIC))
|| grub_le_to_cpu32 (header->version) > 5
|| grub_le_to_cpu32 (header->version) < 1)
{
grub_dprintf ("geli", "wrong magic %02x\n", header->magic[0]);
return NULL;
}
if ((grub_le_to_cpu32 (header->sector_size)
& (grub_le_to_cpu32 (header->sector_size) - 1))
|| grub_le_to_cpu32 (header->sector_size) == 0)
{
grub_dprintf ("geli", "incorrect sector size %d\n",
grub_le_to_cpu32 (header->sector_size));
return NULL;
}
err = grub_crypto_hmac_buffer (GRUB_MD_SHA256,
header->salt, sizeof (header->salt),
"uuid", sizeof ("uuid") - 1, uuidbin);
if (err)
return err;
if (grub_le_to_cpu32 (header->flags) & GRUB_GELI_FLAGS_ONETIME)
{
grub_dprintf ("geli", "skipping one-time volume\n");
return NULL;
}
if (check_boot && !(grub_le_to_cpu32 (header->flags) & GRUB_GELI_FLAGS_BOOT))
{
grub_dprintf ("geli", "not a boot volume\n");
return NULL;
}
gcry_err = grub_crypto_hmac_buffer (GRUB_MD_SHA256,
header->salt, sizeof (header->salt),
"uuid", sizeof ("uuid") - 1, uuidbin);
if (gcry_err)
{
grub_crypto_gcry_error (gcry_err);
return NULL;
}
optr = uuid;
for (iptr = uuidbin; iptr < &uuidbin[ARRAY_SIZE (uuidbin)]; iptr++)
{
@ -207,22 +161,133 @@ configure_ciphers (const struct grub_geli_phdr *header)
optr += 2;
}
*optr = 0;
return GPG_ERR_NO_ERROR;
}
if (check_uuid && grub_strcasecmp (search_uuid, uuid) != 0)
#ifdef GRUB_UTIL
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <grub/emu/hostdisk.h>
#include <unistd.h>
#include <string.h>
#include <grub/emu/misc.h>
char *
grub_util_get_geli_uuid (const char *dev)
{
int fd = open (dev, O_RDONLY);
grub_uint64_t s;
unsigned log_secsize;
grub_uint8_t hdr[512];
struct grub_geli_phdr *header;
char *uuid;
gcry_err_code_t err;
if (fd < 0)
return NULL;
s = grub_util_get_fd_sectors (fd, &log_secsize);
grub_util_fd_seek (fd, dev, (s << log_secsize) - 512);
uuid = xmalloc (GRUB_MD_SHA256->mdlen * 2 + 1);
if (grub_util_fd_read (fd, (void *) &hdr, 512) < 0)
grub_util_error ("couldn't read ELI metadata");
COMPILE_TIME_ASSERT (sizeof (header) <= 512);
header = (void *) &hdr;
/* Look for GELI magic sequence. */
if (grub_memcmp (header->magic, GELI_MAGIC, sizeof (GELI_MAGIC))
|| grub_le_to_cpu32 (header->version) > 5
|| grub_le_to_cpu32 (header->version) < 1)
grub_util_error ("wrong ELI magic or version");
err = make_uuid ((void *) &hdr, uuid);
if (err)
return NULL;
return uuid;
}
#endif
static grub_cryptodisk_t
configure_ciphers (grub_disk_t disk, const char *check_uuid,
int boot_only)
{
grub_cryptodisk_t newdev;
struct grub_geli_phdr header;
grub_crypto_cipher_handle_t cipher = NULL, secondary_cipher = NULL;
const struct gcry_cipher_spec *ciph;
const char *ciphername = NULL;
gcry_err_code_t gcry_err;
char uuid[GRUB_MD_SHA256->mdlen * 2 + 1];
grub_disk_addr_t sector;
grub_err_t err;
sector = grub_disk_get_size (disk);
if (sector == GRUB_DISK_SIZE_UNKNOWN || sector == 0)
return NULL;
/* Read the GELI header. */
err = grub_disk_read (disk, sector - 1, 0, sizeof (header), &header);
if (err)
return NULL;
/* Look for GELI magic sequence. */
if (grub_memcmp (header.magic, GELI_MAGIC, sizeof (GELI_MAGIC))
|| grub_le_to_cpu32 (header.version) > 5
|| grub_le_to_cpu32 (header.version) < 1)
{
grub_dprintf ("geli", "%s != %s\n", uuid, search_uuid);
grub_dprintf ("geli", "wrong magic %02x\n", header.magic[0]);
return NULL;
}
if (grub_le_to_cpu16 (header->alg) >= ARRAY_SIZE (algorithms)
|| algorithms[grub_le_to_cpu16 (header->alg)] == NULL)
if ((grub_le_to_cpu32 (header.sector_size)
& (grub_le_to_cpu32 (header.sector_size) - 1))
|| grub_le_to_cpu32 (header.sector_size) == 0)
{
grub_dprintf ("geli", "incorrect sector size %d\n",
grub_le_to_cpu32 (header.sector_size));
return NULL;
}
if (grub_le_to_cpu32 (header.flags) & GRUB_GELI_FLAGS_ONETIME)
{
grub_dprintf ("geli", "skipping one-time volume\n");
return NULL;
}
if (boot_only && !(grub_le_to_cpu32 (header.flags) & GRUB_GELI_FLAGS_BOOT))
{
grub_dprintf ("geli", "not a boot volume\n");
return NULL;
}
gcry_err = make_uuid (&header, uuid);
if (gcry_err)
{
grub_crypto_gcry_error (gcry_err);
return NULL;
}
if (check_uuid && grub_strcasecmp (check_uuid, uuid) != 0)
{
grub_dprintf ("geli", "%s != %s\n", uuid, check_uuid);
return NULL;
}
if (grub_le_to_cpu16 (header.alg) >= ARRAY_SIZE (algorithms)
|| algorithms[grub_le_to_cpu16 (header.alg)] == NULL)
{
grub_error (GRUB_ERR_FILE_NOT_FOUND, "Cipher 0x%x unknown",
grub_le_to_cpu16 (header->alg));
grub_le_to_cpu16 (header.alg));
return NULL;
}
ciphername = algorithms[grub_le_to_cpu16 (header->alg)];
ciphername = algorithms[grub_le_to_cpu16 (header.alg)];
ciph = grub_crypto_lookup_cipher_by_name (ciphername);
if (!ciph)
{
@ -236,17 +301,17 @@ configure_ciphers (const struct grub_geli_phdr *header)
if (!cipher)
return NULL;
if (grub_le_to_cpu16 (header->alg) == 0x16)
if (grub_le_to_cpu16 (header.alg) == 0x16)
{
secondary_cipher = grub_crypto_cipher_open (ciph);
if (!secondary_cipher)
return NULL;
}
if (grub_le_to_cpu16 (header->keylen) > 1024)
if (grub_le_to_cpu16 (header.keylen) > 1024)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid keysize %d",
grub_le_to_cpu16 (header->keylen));
grub_le_to_cpu16 (header.keylen));
return NULL;
}
@ -258,7 +323,7 @@ configure_ciphers (const struct grub_geli_phdr *header)
newdev->offset = 0;
newdev->source_disk = NULL;
newdev->benbi_log = 0;
if (grub_le_to_cpu16 (header->alg) == 0x16)
if (grub_le_to_cpu16 (header.alg) == 0x16)
{
newdev->mode = GRUB_CRYPTODISK_MODE_XTS;
newdev->mode_iv = GRUB_CRYPTODISK_MODE_IV_BYTECOUNT64;
@ -274,25 +339,29 @@ configure_ciphers (const struct grub_geli_phdr *header)
newdev->iv_hash = GRUB_MD_SHA256;
for (newdev->log_sector_size = 0;
(1U << newdev->log_sector_size) < grub_le_to_cpu32 (header->sector_size);
(1U << newdev->log_sector_size) < grub_le_to_cpu32 (header.sector_size);
newdev->log_sector_size++);
if (grub_le_to_cpu32 (header->version) >= 5)
if (grub_le_to_cpu32 (header.version) >= 5)
{
newdev->rekey = geli_rekey;
newdev->rekey_shift = 20;
}
#ifdef GRUB_UTIL
newdev->modname = "geli";
#endif
newdev->total_length = grub_disk_get_size (disk) - 1;
grub_memcpy (newdev->uuid, uuid, sizeof (newdev->uuid));
COMPILE_TIME_ASSERT (sizeof (newdev->uuid) >= 32 * 2 + 1);
return newdev;
}
static grub_err_t
recover_key (grub_cryptodisk_t dev, const struct grub_geli_phdr *header,
const char *name, grub_disk_t source __attribute__ ((unused)))
recover_key (grub_disk_t source, grub_cryptodisk_t dev)
{
grub_size_t keysize = grub_le_to_cpu16 (header->keylen) / 8;
grub_size_t keysize;
grub_uint8_t digest[dev->hash->mdlen];
grub_uint8_t geomkey[dev->hash->mdlen];
grub_uint8_t verify_key[dev->hash->mdlen];
@ -300,25 +369,45 @@ recover_key (grub_cryptodisk_t dev, const struct grub_geli_phdr *header,
char passphrase[MAX_PASSPHRASE] = "";
unsigned i;
gcry_err_code_t gcry_err;
struct grub_geli_phdr header;
char *tmp;
grub_disk_addr_t sector;
grub_err_t err;
sector = grub_disk_get_size (source);
if (sector == GRUB_DISK_SIZE_UNKNOWN || sector == 0)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "not a geli");
/* Read the GELI header. */
err = grub_disk_read (source, sector - 1, 0, sizeof (header), &header);
if (err)
return err;
keysize = grub_le_to_cpu16 (header.keylen) / 8;
grub_memset (zero, 0, sizeof (zero));
grub_printf ("Attempting to decrypt master key...\n");
/* Get the passphrase from the user. */
grub_printf ("Enter passphrase for %s (%s): ", name, dev->uuid);
tmp = NULL;
if (source->partition)
tmp = grub_partition_get_name (source->partition);
grub_printf ("Enter passphrase for %s%s%s (%s): ", source->name,
source->partition ? "," : "", tmp ? : "",
dev->uuid);
grub_free (tmp);
if (!grub_password_get (passphrase, MAX_PASSPHRASE))
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Passphrase not supplied");
/* Calculate the PBKDF2 of the user supplied passphrase. */
if (grub_le_to_cpu32 (header->niter) != 0)
if (grub_le_to_cpu32 (header.niter) != 0)
{
grub_uint8_t pbkdf_key[64];
gcry_err = grub_crypto_pbkdf2 (dev->hash, (grub_uint8_t *) passphrase,
grub_strlen (passphrase),
header->salt,
sizeof (header->salt),
grub_le_to_cpu32 (header->niter),
header.salt,
sizeof (header.salt),
grub_le_to_cpu32 (header.niter),
pbkdf_key, sizeof (pbkdf_key));
if (gcry_err)
@ -337,7 +426,7 @@ recover_key (grub_cryptodisk_t dev, const struct grub_geli_phdr *header,
if (!hnd)
return grub_crypto_gcry_error (GPG_ERR_OUT_OF_MEMORY);
grub_crypto_hmac_write (hnd, header->salt, sizeof (header->salt));
grub_crypto_hmac_write (hnd, header.salt, sizeof (header.salt));
grub_crypto_hmac_write (hnd, passphrase, grub_strlen (passphrase));
gcry_err = grub_crypto_hmac_fini (hnd, geomkey);
@ -358,13 +447,13 @@ recover_key (grub_cryptodisk_t dev, const struct grub_geli_phdr *header,
grub_dprintf ("geli", "keylen = %" PRIuGRUB_SIZE "\n", keysize);
/* Try to recover master key from each active keyslot. */
for (i = 0; i < ARRAY_SIZE (header->keys); i++)
for (i = 0; i < ARRAY_SIZE (header.keys); i++)
{
struct grub_geli_key candidate_key;
grub_uint8_t key_hmac[dev->hash->mdlen];
/* Check if keyslot is enabled. */
if (! (header->keys_used & (1 << i)))
if (! (header.keys_used & (1 << i)))
continue;
grub_dprintf ("geli", "Trying keyslot %d\n", i);
@ -375,7 +464,7 @@ recover_key (grub_cryptodisk_t dev, const struct grub_geli_phdr *header,
return grub_crypto_gcry_error (gcry_err);
gcry_err = grub_crypto_cbc_decrypt (dev->cipher, &candidate_key,
&header->keys[i],
&header.keys[i],
sizeof (candidate_key),
zero);
if (gcry_err)
@ -398,7 +487,7 @@ recover_key (grub_cryptodisk_t dev, const struct grub_geli_phdr *header,
if (!dev->rekey)
{
grub_size_t real_keysize = keysize;
if (grub_le_to_cpu16 (header->alg) == 0x16)
if (grub_le_to_cpu16 (header.alg) == 0x16)
real_keysize *= 2;
gcry_err = grub_cryptodisk_setkey (dev, candidate_key.cipher_key,
real_keysize);
@ -408,7 +497,7 @@ recover_key (grub_cryptodisk_t dev, const struct grub_geli_phdr *header,
else
{
grub_size_t real_keysize = keysize;
if (grub_le_to_cpu16 (header->alg) == 0x16)
if (grub_le_to_cpu16 (header.alg) == 0x16)
real_keysize *= 2;
/* For a reason I don't know, the IV key is used in rekeying. */
grub_memcpy (dev->rekey_key, candidate_key.iv_key,
@ -431,216 +520,17 @@ recover_key (grub_cryptodisk_t dev, const struct grub_geli_phdr *header,
return GRUB_ACCESS_DENIED;
}
static void
close (grub_cryptodisk_t luks)
{
grub_crypto_cipher_close (luks->cipher);
grub_crypto_cipher_close (luks->secondary_cipher);
grub_crypto_cipher_close (luks->essiv_cipher);
grub_free (luks);
}
static grub_err_t
grub_geli_scan_device_real (const char *name, grub_disk_t source)
{
grub_err_t err;
struct grub_geli_phdr header;
grub_cryptodisk_t newdev, dev;
grub_disk_addr_t sector;
grub_dprintf ("geli", "scanning %s\n", source->name);
dev = grub_cryptodisk_get_by_source_disk (source);
if (dev)
return GRUB_ERR_NONE;
sector = grub_disk_get_size (source);
if (sector == GRUB_DISK_SIZE_UNKNOWN)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "not a geli");
/* Read the LUKS header. */
err = grub_disk_read (source, sector - 1, 0, sizeof (header), &header);
if (err)
return err;
newdev = configure_ciphers (&header);
if (!newdev)
return grub_errno;
newdev->total_length = grub_disk_get_size (source) - 1;
err = recover_key (newdev, &header, name, source);
if (err)
{
close (newdev);
return err;
}
grub_cryptodisk_insert (newdev, name, source);
have_it = 1;
return GRUB_ERR_NONE;
}
#ifdef GRUB_UTIL
grub_err_t
grub_geli_cheat_mount (const char *sourcedev, const char *cheat)
{
grub_err_t err;
struct grub_geli_phdr header;
grub_cryptodisk_t newdev, dev;
grub_disk_t source;
grub_disk_addr_t sector;
/* Try to open disk. */
source = grub_disk_open (sourcedev);
if (!source)
return grub_errno;
dev = grub_cryptodisk_get_by_source_disk (source);
if (dev)
{
grub_disk_close (source);
return GRUB_ERR_NONE;
}
sector = grub_disk_get_size (source);
if (sector == GRUB_DISK_SIZE_UNKNOWN)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "not a geli");
/* Read the LUKS header. */
err = grub_disk_read (source, sector - 1, 0, sizeof (header), &header);
if (err)
return err;
newdev = configure_ciphers (&header);
if (!newdev)
{
grub_disk_close (source);
return grub_errno;
}
newdev->total_length = grub_disk_get_size (source) - 1;
err = grub_cryptodisk_cheat_insert (newdev, sourcedev, source, cheat);
grub_disk_close (source);
if (err)
grub_free (newdev);
return err;
}
#endif
static int
grub_geli_scan_device (const char *name)
{
grub_err_t err;
grub_disk_t source;
/* Try to open disk. */
source = grub_disk_open (name);
if (!source)
return grub_errno;
err = grub_geli_scan_device_real (name, source);
grub_disk_close (source);
if (err)
grub_print_error ();
return have_it && check_uuid ? 0 : 1;
}
#ifdef GRUB_UTIL
void
grub_util_geli_print_uuid (grub_disk_t disk)
{
grub_cryptodisk_t dev = (grub_cryptodisk_t) disk->data;
grub_printf ("%s ", dev->uuid);
}
#endif
static grub_err_t
grub_cmd_gelimount (grub_extcmd_context_t ctxt, int argc, char **args)
{
struct grub_arg_list *state = ctxt->state;
if (argc < 1 && !state[1].set && !state[2].set)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "device name required");
have_it = 0;
if (state[0].set)
{
grub_cryptodisk_t dev;
dev = grub_cryptodisk_get_by_uuid (args[0]);
if (dev)
{
grub_dprintf ("luks", "already mounted as crypto%lu\n", dev->id);
return GRUB_ERR_NONE;
}
check_uuid = 1;
check_boot = state[2].set;
search_uuid = args[0];
grub_device_iterate (&grub_geli_scan_device);
search_uuid = NULL;
if (!have_it)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no such luks found");
return GRUB_ERR_NONE;
}
else if (state[1].set || (argc == 0 && state[2].set))
{
check_uuid = 0;
search_uuid = NULL;
check_boot = state[2].set;
grub_device_iterate (&grub_geli_scan_device);
search_uuid = NULL;
return GRUB_ERR_NONE;
}
else
{
grub_err_t err;
grub_disk_t disk;
grub_cryptodisk_t dev;
check_uuid = 0;
search_uuid = NULL;
check_boot = state[2].set;
disk = grub_disk_open (args[0]);
if (!disk)
return grub_errno;
dev = grub_cryptodisk_get_by_source_disk (disk);
if (dev)
{
grub_dprintf ("luks", "already mounted as luks%lu\n", dev->id);
grub_disk_close (disk);
return GRUB_ERR_NONE;
}
err = grub_geli_scan_device_real (args[0], disk);
grub_disk_close (disk);
return err;
}
}
static grub_extcmd_t cmd;
struct grub_cryptodisk_dev geli_crypto = {
.scan = configure_ciphers,
.recover_key = recover_key
};
GRUB_MOD_INIT (geli)
{
cmd = grub_register_extcmd ("gelimount", grub_cmd_gelimount, 0,
N_("SOURCE|-u UUID|-a|-b"),
N_("Mount a GELI device."), options);
grub_cryptodisk_dev_register (&geli_crypto);
}
GRUB_MOD_FINI (geli)
{
grub_unregister_extcmd (cmd);
grub_cryptodisk_dev_unregister (&geli_crypto);
}

329
grub-core/disk/luks.c
View file

@ -24,7 +24,7 @@
#include <grub/err.h>
#include <grub/disk.h>
#include <grub/crypto.h>
#include <grub/extcmd.h>
#include <grub/partition.h>
#include <grub/i18n.h>
GRUB_MOD_LICENSE ("GPLv3+");
@ -64,27 +64,19 @@ gcry_err_code_t AF_merge (const gcry_md_spec_t * hash, grub_uint8_t * src,
grub_uint8_t * dst, grub_size_t blocksize,
grub_size_t blocknumbers);
static const struct grub_arg_option options[] =
{
{"uuid", 'u', 0, N_("Mount by UUID."), 0, 0},
{"all", 'a', 0, N_("Mount all."), 0, 0},
{0, 0, 0, 0, 0, 0}
};
static int check_uuid, have_it;
static char *search_uuid;
static grub_cryptodisk_t
configure_ciphers (const struct grub_luks_phdr *header)
configure_ciphers (grub_disk_t disk, const char *check_uuid,
int check_boot)
{
grub_cryptodisk_t newdev;
const char *iptr;
struct grub_luks_phdr header;
char *optr;
char uuid[sizeof (header->uuid) + 1];
char ciphername[sizeof (header->cipherName) + 1];
char ciphermode[sizeof (header->cipherMode) + 1];
char uuid[sizeof (header.uuid) + 1];
char ciphername[sizeof (header.cipherName) + 1];
char ciphermode[sizeof (header.cipherMode) + 1];
char *cipheriv = NULL;
char hashspec[sizeof (header->hashSpec) + 1];
char hashspec[sizeof (header.hashSpec) + 1];
grub_crypto_cipher_handle_t cipher = NULL, secondary_cipher = NULL;
grub_crypto_cipher_handle_t essiv_cipher = NULL;
const gcry_md_spec_t *hash = NULL, *essiv_hash = NULL;
@ -92,14 +84,27 @@ configure_ciphers (const struct grub_luks_phdr *header)
grub_cryptodisk_mode_t mode;
grub_cryptodisk_mode_iv_t mode_iv;
int benbi_log = 0;
grub_err_t err;
if (check_boot)
return NULL;
/* Read the LUKS header. */
err = grub_disk_read (disk, 0, 0, sizeof (header), &header);
if (err)
{
if (err == GRUB_ERR_OUT_OF_RANGE)
grub_errno = GRUB_ERR_NONE;
return NULL;
}
/* Look for LUKS magic sequence. */
if (grub_memcmp (header->magic, LUKS_MAGIC, sizeof (header->magic))
|| grub_be_to_cpu16 (header->version) != 1)
if (grub_memcmp (header.magic, LUKS_MAGIC, sizeof (header.magic))
|| grub_be_to_cpu16 (header.version) != 1)
return NULL;
optr = uuid;
for (iptr = header->uuid; iptr < &header->uuid[ARRAY_SIZE (header->uuid)];
for (iptr = header.uuid; iptr < &header.uuid[ARRAY_SIZE (header.uuid)];
iptr++)
{
if (*iptr != '-')
@ -107,19 +112,19 @@ configure_ciphers (const struct grub_luks_phdr *header)
}
*optr = 0;
if (check_uuid && grub_strcasecmp (search_uuid, uuid) != 0)
if (check_uuid && grub_strcasecmp (check_uuid, uuid) != 0)
{
grub_dprintf ("luks", "%s != %s\n", uuid, search_uuid);
grub_dprintf ("luks", "%s != %s\n", uuid, check_uuid);
return NULL;
}
/* Make sure that strings are null terminated. */
grub_memcpy (ciphername, header->cipherName, sizeof (header->cipherName));
ciphername[sizeof (header->cipherName)] = 0;
grub_memcpy (ciphermode, header->cipherMode, sizeof (header->cipherMode));
ciphermode[sizeof (header->cipherMode)] = 0;
grub_memcpy (hashspec, header->hashSpec, sizeof (header->hashSpec));
hashspec[sizeof (header->hashSpec)] = 0;
grub_memcpy (ciphername, header.cipherName, sizeof (header.cipherName));
ciphername[sizeof (header.cipherName)] = 0;
grub_memcpy (ciphermode, header.cipherMode, sizeof (header.cipherMode));
ciphermode[sizeof (header.cipherMode)] = 0;
grub_memcpy (hashspec, header.hashSpec, sizeof (header.hashSpec));
hashspec[sizeof (header.hashSpec)] = 0;
ciph = grub_crypto_lookup_cipher_by_name (ciphername);
if (!ciph)
@ -134,10 +139,10 @@ configure_ciphers (const struct grub_luks_phdr *header)
if (!cipher)
return NULL;
if (grub_be_to_cpu32 (header->keyBytes) > 1024)
if (grub_be_to_cpu32 (header.keyBytes) > 1024)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid keysize %d",
grub_be_to_cpu32 (header->keyBytes));
grub_be_to_cpu32 (header.keyBytes));
return NULL;
}
@ -273,7 +278,7 @@ configure_ciphers (const struct grub_luks_phdr *header)
if (!newdev)
return NULL;
newdev->cipher = cipher;
newdev->offset = grub_be_to_cpu32 (header->payloadOffset);
newdev->offset = grub_be_to_cpu32 (header.payloadOffset);
newdev->source_disk = NULL;
newdev->benbi_log = benbi_log;
newdev->mode = mode;
@ -283,39 +288,54 @@ configure_ciphers (const struct grub_luks_phdr *header)
newdev->essiv_hash = essiv_hash;
newdev->hash = hash;
newdev->log_sector_size = 9;
newdev->total_length = grub_disk_get_size (disk) - newdev->offset;
grub_memcpy (newdev->uuid, uuid, sizeof (newdev->uuid));
#ifdef GRUB_UTIL
newdev->modname = "luks";
#endif
COMPILE_TIME_ASSERT (sizeof (newdev->uuid) >= sizeof (uuid));
return newdev;
}
static grub_err_t
luks_recover_key (grub_cryptodisk_t dev, const struct grub_luks_phdr *header,
const char *name, grub_disk_t source)
luks_recover_key (grub_disk_t source,
grub_cryptodisk_t dev)
{
grub_size_t keysize = grub_be_to_cpu32 (header->keyBytes);
grub_uint8_t candidate_key[keysize];
grub_uint8_t digest[keysize];
struct grub_luks_phdr header;
grub_size_t keysize;
grub_uint8_t *split_key = NULL;
char passphrase[MAX_PASSPHRASE] = "";
grub_uint8_t candidate_digest[sizeof (header->mkDigest)];
grub_uint8_t candidate_digest[sizeof (header.mkDigest)];
unsigned i;
grub_size_t length;
grub_err_t err;
grub_size_t max_stripes = 1;
char *tmp;
err = grub_disk_read (source, 0, 0, sizeof (header), &header);
if (err)
return err;
grub_printf ("Attempting to decrypt master key...\n");
keysize = grub_be_to_cpu32 (header.keyBytes);
for (i = 0; i < ARRAY_SIZE (header->keyblock); i++)
if (grub_be_to_cpu32 (header->keyblock[i].active) == LUKS_KEY_ENABLED
&& grub_be_to_cpu32 (header->keyblock[i].stripes) > max_stripes)
max_stripes = grub_be_to_cpu32 (header->keyblock[i].stripes);
for (i = 0; i < ARRAY_SIZE (header.keyblock); i++)
if (grub_be_to_cpu32 (header.keyblock[i].active) == LUKS_KEY_ENABLED
&& grub_be_to_cpu32 (header.keyblock[i].stripes) > max_stripes)
max_stripes = grub_be_to_cpu32 (header.keyblock[i].stripes);
split_key = grub_malloc (keysize * max_stripes);
if (!split_key)
return grub_errno;
/* Get the passphrase from the user. */
grub_printf ("Enter passphrase for %s (%s): ", name, dev->uuid);
tmp = NULL;
if (source->partition)
tmp = grub_partition_get_name (source->partition);
grub_printf ("Enter passphrase for %s%s%s (%s): ", source->name,
source->partition ? "," : "", tmp ? : "",
dev->uuid);
grub_free (tmp);
if (!grub_password_get (passphrase, MAX_PASSPHRASE))
{
grub_free (split_key);
@ -323,12 +343,14 @@ luks_recover_key (grub_cryptodisk_t dev, const struct grub_luks_phdr *header,
}
/* Try to recover master key from each active keyslot. */
for (i = 0; i < ARRAY_SIZE (header->keyblock); i++)
for (i = 0; i < ARRAY_SIZE (header.keyblock); i++)
{
gcry_err_code_t gcry_err;
grub_uint8_t candidate_key[keysize];
grub_uint8_t digest[keysize];
/* Check if keyslot is enabled. */
if (grub_be_to_cpu32 (header->keyblock[i].active) != LUKS_KEY_ENABLED)
if (grub_be_to_cpu32 (header.keyblock[i].active) != LUKS_KEY_ENABLED)
continue;
grub_dprintf ("luks", "Trying keyslot %d\n", i);
@ -336,9 +358,9 @@ luks_recover_key (grub_cryptodisk_t dev, const struct grub_luks_phdr *header,
/* Calculate the PBKDF2 of the user supplied passphrase. */
gcry_err = grub_crypto_pbkdf2 (dev->hash, (grub_uint8_t *) passphrase,
grub_strlen (passphrase),
header->keyblock[i].passwordSalt,
sizeof (header->keyblock[i].passwordSalt),
grub_be_to_cpu32 (header->keyblock[i].
header.keyblock[i].passwordSalt,
sizeof (header.keyblock[i].passwordSalt),
grub_be_to_cpu32 (header.keyblock[i].
passwordIterations),
digest, keysize);
@ -357,11 +379,11 @@ luks_recover_key (grub_cryptodisk_t dev, const struct grub_luks_phdr *header,
return grub_crypto_gcry_error (gcry_err);
}
length = (keysize * grub_be_to_cpu32 (header->keyblock[i].stripes));
length = (keysize * grub_be_to_cpu32 (header.keyblock[i].stripes));
/* Read and decrypt the key material from the disk. */
err = grub_disk_read (source,
grub_be_to_cpu32 (header->keyblock
grub_be_to_cpu32 (header.keyblock
[i].keyMaterialOffset), 0,
length, split_key);
if (err)
@ -379,7 +401,7 @@ luks_recover_key (grub_cryptodisk_t dev, const struct grub_luks_phdr *header,
/* Merge the decrypted key material to get the candidate master key. */
gcry_err = AF_merge (dev->hash, split_key, candidate_key, keysize,
grub_be_to_cpu32 (header->keyblock[i].stripes));
grub_be_to_cpu32 (header.keyblock[i].stripes));
if (gcry_err)
{
grub_free (split_key);
@ -390,11 +412,11 @@ luks_recover_key (grub_cryptodisk_t dev, const struct grub_luks_phdr *header,
/* Calculate the PBKDF2 of the candidate master key. */
gcry_err = grub_crypto_pbkdf2 (dev->hash, candidate_key,
grub_be_to_cpu32 (header->keyBytes),
header->mkDigestSalt,
sizeof (header->mkDigestSalt),
grub_be_to_cpu32 (header.keyBytes),
header.mkDigestSalt,
sizeof (header.mkDigestSalt),
grub_be_to_cpu32
(header->mkDigestIterations),
(header.mkDigestIterations),
candidate_digest,
sizeof (candidate_digest));
if (gcry_err)
@ -405,8 +427,8 @@ luks_recover_key (grub_cryptodisk_t dev, const struct grub_luks_phdr *header,
/* Compare the calculated PBKDF2 to the digest stored
in the header to see if it's correct. */
if (grub_memcmp (candidate_digest, header->mkDigest,
sizeof (header->mkDigest)) != 0)
if (grub_memcmp (candidate_digest, header.mkDigest,
sizeof (header.mkDigest)) != 0)
{
grub_dprintf ("luks", "bad digest\n");
continue;
@ -430,204 +452,19 @@ luks_recover_key (grub_cryptodisk_t dev, const struct grub_luks_phdr *header,
return GRUB_ACCESS_DENIED;
}
static void
luks_close (grub_cryptodisk_t luks)
{
grub_crypto_cipher_close (luks->cipher);
grub_crypto_cipher_close (luks->secondary_cipher);
grub_crypto_cipher_close (luks->essiv_cipher);
grub_free (luks);
}
static grub_err_t
grub_luks_scan_device_real (const char *name, grub_disk_t source)
{
grub_err_t err;
struct grub_luks_phdr header;
grub_cryptodisk_t newdev, dev;
dev = grub_cryptodisk_get_by_source_disk (source);
if (dev)
return GRUB_ERR_NONE;
/* Read the LUKS header. */
err = grub_disk_read (source, 0, 0, sizeof (header), &header);
if (err)
return err;
newdev = configure_ciphers (&header);
if (!newdev)
return grub_errno;
newdev->total_length = grub_disk_get_size (source) - newdev->offset;
err = luks_recover_key (newdev, &header, name, source);
if (err)
{
luks_close (newdev);
return err;
}
grub_cryptodisk_insert (newdev, name, source);
have_it = 1;
return GRUB_ERR_NONE;
}
#ifdef GRUB_UTIL
grub_err_t
grub_luks_cheat_mount (const char *sourcedev, const char *cheat)
{
grub_err_t err;
struct grub_luks_phdr header;
grub_cryptodisk_t newdev, dev;
grub_disk_t source;
/* Try to open disk. */
source = grub_disk_open (sourcedev);
if (!source)
return grub_errno;
dev = grub_cryptodisk_get_by_source_disk (source);
if (dev)
{
grub_disk_close (source);
return GRUB_ERR_NONE;
}
/* Read the LUKS header. */
err = grub_disk_read (source, 0, 0, sizeof (header), &header);
if (err)
return err;
newdev = configure_ciphers (&header);
if (!newdev)
{
grub_disk_close (source);
return grub_errno;
}
newdev->total_length = grub_disk_get_size (source) - newdev->offset;
err = grub_cryptodisk_cheat_insert (newdev, sourcedev, source, cheat);
grub_disk_close (source);
if (err)
grub_free (newdev);
return err;
}
#endif
static int
grub_luks_scan_device (const char *name)
{
grub_err_t err;
grub_disk_t source;
/* Try to open disk. */
source = grub_disk_open (name);
if (!source)
return grub_errno;
err = grub_luks_scan_device_real (name, source);
grub_disk_close (source);
if (err)
grub_print_error ();
return have_it && check_uuid ? 0 : 1;
}
#ifdef GRUB_UTIL
void
grub_util_luks_print_uuid (grub_disk_t disk)
{
grub_cryptodisk_t dev = (grub_cryptodisk_t) disk->data;
grub_printf ("%s ", dev->uuid);
}
#endif
static grub_err_t
grub_cmd_luksmount (grub_extcmd_context_t ctxt, int argc, char **args)
{
struct grub_arg_list *state = ctxt->state;
if (argc < 1 && !state[1].set)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "device name required");
have_it = 0;
if (state[0].set)
{
grub_cryptodisk_t dev;
dev = grub_cryptodisk_get_by_uuid (args[0]);
if (dev)
{
grub_dprintf ("luks", "already mounted as crypto%lu\n", dev->id);
return GRUB_ERR_NONE;
}
check_uuid = 1;
search_uuid = args[0];
grub_device_iterate (&grub_luks_scan_device);
search_uuid = NULL;
if (!have_it)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no such luks found");
return GRUB_ERR_NONE;
}
else if (state[1].set)
{
check_uuid = 0;
search_uuid = NULL;
grub_device_iterate (&grub_luks_scan_device);
search_uuid = NULL;
return GRUB_ERR_NONE;
}
else
{
grub_err_t err;
grub_disk_t disk;
grub_cryptodisk_t dev;
check_uuid = 0;
search_uuid = NULL;
disk = grub_disk_open (args[0]);
if (!disk)
return grub_errno;
dev = grub_cryptodisk_get_by_source_disk (disk);
if (dev)
{
grub_dprintf ("luks", "already mounted as luks%lu\n", dev->id);
grub_disk_close (disk);
return GRUB_ERR_NONE;
}
err = grub_luks_scan_device_real (args[0], disk);
grub_disk_close (disk);
return err;
}
}
static grub_extcmd_t cmd;
struct grub_cryptodisk_dev luks_crypto = {
.scan = configure_ciphers,
.recover_key = luks_recover_key
};
GRUB_MOD_INIT (luks)
{
COMPILE_TIME_ASSERT (sizeof (((struct grub_luks_phdr *) 0)->uuid)
< GRUB_CRYPTODISK_MAX_UUID_LENGTH);
cmd = grub_register_extcmd ("luksmount", grub_cmd_luksmount, 0,
N_("SOURCE|-u UUID|-a"),
N_("Mount a LUKS device."), options);
grub_cryptodisk_dev_register (&luks_crypto);
}
GRUB_MOD_FINI (luks)
{
grub_unregister_extcmd (cmd);
grub_cryptodisk_dev_unregister (&luks_crypto);
}

217
grub-core/kern/emu/getroot.c
View file

@ -33,6 +33,7 @@
#include <stdlib.h>
#include <stdint.h>
#include <grub/util/misc.h>
#include <grub/cryptodisk.h>
#ifdef HAVE_DEVICE_MAPPER
# include <libdevmapper.h>
@ -756,6 +757,94 @@ grub_util_get_dm_abstraction (const char *os_dev)
#endif
}
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <libgeom.h>
/* FIXME: geom actually gives us the whole container hierarchy.
It can be used more efficiently than this. */
void
grub_util_follow_gpart_up (const char *name, grub_disk_addr_t *off_out, char **name_out)
{
struct gmesh mesh;
struct gclass *class;
int error;
struct ggeom *geom;
grub_util_info ("following geom '%s'", name);
error = geom_gettree (&mesh);
if (error != 0)
grub_util_error ("couldn't open geom");
LIST_FOREACH (class, &mesh.lg_class, lg_class)
if (strcasecmp (class->lg_name, "part") == 0)
break;
if (!class)
grub_util_error ("couldn't open geom part");
LIST_FOREACH (geom, &class->lg_geom, lg_geom)
{
struct gprovider *provider;
LIST_FOREACH (provider, &geom->lg_provider, lg_provider)
if (strcmp (provider->lg_name, name) == 0)
{
char *name_tmp = xstrdup (geom->lg_name);
grub_disk_addr_t off = 0;
struct gconfig *config;
grub_util_info ("geom '%s' has parent '%s'", name, geom->lg_name);
grub_util_follow_gpart_up (name_tmp, &off, name_out);
free (name_tmp);
LIST_FOREACH (config, &provider->lg_config, lg_config)
if (strcasecmp (config->lg_name, "start") == 0)
off += strtoull (config->lg_val, 0, 10);
if (off_out)
*off_out = off;
return;
}
}
grub_util_info ("geom '%s' has no parent", name);
if (name_out)
*name_out = xstrdup (name);
if (off_out)
*off_out = 0;
}
static const char *
grub_util_get_geom_abstraction (const char *dev)
{
char *whole;
struct gmesh mesh;
struct gclass *class;
const char *name;
int error;
if (strncmp (dev, "/dev/", sizeof ("/dev/") - 1) != 0)
return 0;
name = dev + sizeof ("/dev/") - 1;
grub_util_follow_gpart_up (name, NULL, &whole);
grub_util_info ("following geom '%s'", name);
error = geom_gettree (&mesh);
if (error != 0)
grub_util_error ("couldn't open geom");
LIST_FOREACH (class, &mesh.lg_class, lg_class)
{
struct ggeom *geom;
LIST_FOREACH (geom, &class->lg_geom, lg_geom)
{
struct gprovider *provider;
LIST_FOREACH (provider, &geom->lg_provider, lg_provider)
if (strcmp (provider->lg_name, name) == 0)
return class->lg_name;
}
}
return NULL;
}
#endif
int
grub_util_get_dev_abstraction (const char *os_dev __attribute__((unused)))
{
@ -777,6 +866,14 @@ grub_util_get_dev_abstraction (const char *os_dev __attribute__((unused)))
return GRUB_DEV_ABSTRACTION_RAID;
#endif
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
const char *abs;
abs = grub_util_get_geom_abstraction (os_dev);
grub_util_info ("abstraction of %s is %s", os_dev, abs);
if (abs && grub_strcasecmp (abs, "eli") == 0)
return GRUB_DEV_ABSTRACTION_GELI;
#endif
/* No abstraction found. */
return GRUB_DEV_ABSTRACTION_NONE;
}
@ -869,6 +966,71 @@ grub_util_pull_device (const char *os_dev)
ab = grub_util_get_dev_abstraction (os_dev);
switch (ab)
{
case GRUB_DEV_ABSTRACTION_GELI:
{
char *whole;
struct gmesh mesh;
struct gclass *class;
const char *name;
int error;
char *lastsubdev = NULL;
if (strncmp (os_dev, "/dev/", sizeof ("/dev/") - 1) != 0)
return;
name = os_dev + sizeof ("/dev/") - 1;
grub_util_follow_gpart_up (name, NULL, &whole);
grub_util_info ("following geom '%s'", name);
error = geom_gettree (&mesh);
if (error != 0)
grub_util_error ("couldn't open geom");
LIST_FOREACH (class, &mesh.lg_class, lg_class)
{
struct ggeom *geom;
LIST_FOREACH (geom, &class->lg_geom, lg_geom)
{
struct gprovider *provider;
LIST_FOREACH (provider, &geom->lg_provider, lg_provider)
if (strcmp (provider->lg_name, name) == 0)
{
struct gconsumer *consumer;
char *fname;
char *uuid;
LIST_FOREACH (consumer, &geom->lg_consumer, lg_consumer)
break;
if (!consumer)
grub_util_error ("couldn't find geli consumer");
fname = xasprintf ("/dev/%s", consumer->lg_provider->lg_name);
grub_util_info ("consumer %s", consumer->lg_provider->lg_name);
lastsubdev = consumer->lg_provider->lg_name;
grub_util_pull_device (fname);
free (fname);
}
}
}
if (ab == GRUB_DEV_ABSTRACTION_GELI && lastsubdev)
{
char *fname = xasprintf ("/dev/%s", lastsubdev);
char *grdev = grub_util_get_grub_dev (fname);
free (fname);
if (grdev)
{
grub_err_t err;
err = grub_cryptodisk_cheat_mount (grdev, os_dev);
if (err)
grub_util_error ("Can't mount crypto: %s", grub_errmsg);
}
grub_free (grdev);
}
}
break;
case GRUB_DEV_ABSTRACTION_LVM:
case GRUB_DEV_ABSTRACTION_LUKS:
#ifdef HAVE_DEVICE_MAPPER
@ -895,7 +1057,7 @@ grub_util_pull_device (const char *os_dev)
grub_util_pull_device (subdev);
}
}
if (ab == GRUB_DEV_ABSTRACTION_LUKS && lastsubdev)
if (ab == GRUB_DEV_ABSTRACTION_CRYPTO && lastsubdev)
{
char *grdev = grub_util_get_grub_dev (lastsubdev);
dm_tree_free (tree);
@ -904,7 +1066,7 @@ grub_util_pull_device (const char *os_dev)
grub_err_t err;
err = grub_luks_cheat_mount (grdev, os_dev);
if (err)
grub_util_error ("Can't mount LUKS: %s", grub_errmsg);
grub_util_error ("Can't mount crypto: %s", grub_errmsg);
}
grub_free (grdev);
}
@ -959,6 +1121,8 @@ grub_util_get_grub_dev (const char *os_dev)
{
char *uuid, *dash;
uuid = get_dm_uuid (os_dev);
if (!uuid)
break;
dash = grub_strchr (uuid + sizeof ("CRYPT-LUKS1-") - 1, '-');
if (dash)
*dash = 0;
@ -968,6 +1132,55 @@ grub_util_get_grub_dev (const char *os_dev)
}
break;
case GRUB_DEV_ABSTRACTION_GELI:
{
char *whole;
struct gmesh mesh;
struct gclass *class;
const char *name;
int error;
if (strncmp (os_dev, "/dev/", sizeof ("/dev/") - 1) != 0)
return 0;
name = os_dev + sizeof ("/dev/") - 1;
grub_util_follow_gpart_up (name, NULL, &whole);
grub_util_info ("following geom '%s'", name);
error = geom_gettree (&mesh);
if (error != 0)
grub_util_error ("couldn't open geom");
LIST_FOREACH (class, &mesh.lg_class, lg_class)
{
struct ggeom *geom;
LIST_FOREACH (geom, &class->lg_geom, lg_geom)
{
struct gprovider *provider;
LIST_FOREACH (provider, &geom->lg_provider, lg_provider)
if (strcmp (provider->lg_name, name) == 0)
{
struct gconsumer *consumer;
char *fname;
char *uuid;
LIST_FOREACH (consumer, &geom->lg_consumer, lg_consumer)
break;
if (!consumer)
grub_util_error ("couldn't find geli consumer");
fname = xasprintf ("/dev/%s", consumer->lg_provider->lg_name);
uuid = grub_util_get_geli_uuid (fname);
if (!uuid)
grub_util_error ("couldn't retrieve geli UUID");
grub_dev = xasprintf ("cryptouuid/%s", uuid);
free (fname);
free (uuid);
}
}
}
}
break;
case GRUB_DEV_ABSTRACTION_RAID:
if (os_dev[7] == '_' && os_dev[8] == 'd')

204
grub-core/kern/emu/hostdisk.c
View file

@ -106,9 +106,7 @@ struct hd_geometry
# include <libdevmapper.h>
#endif
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <libgeom.h>
#elif defined(__NetBSD__)
#if defined(__NetBSD__)
# define HAVE_DIOCGDINFO
# include <sys/ioctl.h>
# include <sys/disklabel.h> /* struct disklabel */
@ -226,6 +224,82 @@ grub_util_biosdisk_iterate (int (*hook) (const char *name),
return 0;
}
#if !defined(__MINGW32__)
grub_uint64_t
grub_util_get_fd_sectors (int fd, unsigned *log_secsize)
{
#if defined(__linux__) || defined(__CYGWIN__) || defined(__FreeBSD__) || \
defined(__FreeBSD_kernel__) || defined(__APPLE__) || defined(__NetBSD__)
# if defined(__NetBSD__)
struct disklabel label;
# else
unsigned long long nr;
# endif
unsigned sector_size, log_sector_size;
struct stat st;
if (fstat (fd, &st) < 0)
grub_util_error ("fstat failed");
# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__APPLE__) || defined(__NetBSD__)
if (! S_ISCHR (st.st_mode))
# else
if (! S_ISBLK (st.st_mode))
# endif
goto fail;
# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
if (ioctl (fd, DIOCGMEDIASIZE, &nr))
# elif defined(__APPLE__)
if (ioctl (fd, DKIOCGETBLOCKCOUNT, &nr))
# elif defined(__NetBSD__)
configure_device_driver (fd);
if (ioctl (fd, DIOCGDINFO, &label) == -1)
# else
if (ioctl (fd, BLKGETSIZE64, &nr))
# endif
goto fail;
# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
if (ioctl (fd, DIOCGSECTORSIZE, &sector_size))
# else
if (ioctl (fd, BLKSSZGET, &sector_size))
# endif
goto fail;
if (sector_size & (sector_size - 1) || !sector_size)
goto fail;
for (log_sector_size = 0;
(1 << log_sector_size) < sector_size;
log_sector_size++);
if (log_secsize)
*log_secsize = log_sector_size;
# if defined (__APPLE__)
return nr;
# elif defined(__NetBSD__)
return label.d_secperunit;
# else
if (nr & ((1 << log_sector_size) - 1))
grub_util_error ("unaligned device size");
return (nr >> log_sector_size);
# endif
fail:
/* In GNU/Hurd, stat() will return the right size. */
#elif !defined (__GNU__)
# warning "No special routine to get the size of a block device is implemented for your OS. This is not possibly fatal."
#endif
if (log_secsize)
*log_secsize = 9;
return st.st_size >> 9;
}
#endif
static grub_err_t
grub_util_biosdisk_open (const char *name, grub_disk_t disk,
grub_disk_pull_t pull __attribute__ ((unused)))
@ -262,90 +336,30 @@ grub_util_biosdisk_open (const char *name, grub_disk_t disk,
return GRUB_ERR_NONE;
}
#elif defined(__linux__) || defined(__CYGWIN__) || defined(__FreeBSD__) || \
defined(__FreeBSD_kernel__) || defined(__APPLE__) || defined(__NetBSD__)
#else
{
# if defined(__NetBSD__)
struct disklabel label;
# else
unsigned long long nr;
# endif
int sector_size;
int fd;
fd = open (map[drive].device, O_RDONLY);
if (fd == -1)
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "cannot open `%s' while attempting to get disk size", map[drive].device);
disk->total_sectors = grub_util_get_fd_sectors (fd, &disk->log_sector_size);
# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__APPLE__) || defined(__NetBSD__)
if (fstat (fd, &st) < 0 || ! S_ISCHR (st.st_mode))
# else
if (fstat (fd, &st) < 0 || ! S_ISBLK (st.st_mode))
# endif
{
close (fd);
goto fail;
}
data->is_disk = 1;
# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
if (ioctl (fd, DIOCGMEDIASIZE, &nr))
# elif defined(__APPLE__)
if (ioctl (fd, DKIOCGETBLOCKCOUNT, &nr))
# elif defined(__NetBSD__)
configure_device_driver (fd);
if (ioctl (fd, DIOCGDINFO, &label) == -1)
# else
if (ioctl (fd, BLKGETSIZE64, &nr))
# endif
{
close (fd);
goto fail;
}
if (ioctl (fd, BLKSSZGET, &sector_size))
{
close (fd);
goto fail;
}
data->is_disk = 1;
close (fd);
if (sector_size & (sector_size - 1) || !sector_size)
goto fail;
for (disk->log_sector_size = 0;
(1 << disk->log_sector_size) < sector_size;
disk->log_sector_size++);
# if defined (__APPLE__)
disk->total_sectors = nr;
# elif defined(__NetBSD__)
disk->total_sectors = label.d_secperunit;
# else
disk->total_sectors = nr >> disk->log_sector_size;
if (nr & ((1 << disk->log_sector_size) - 1))
grub_util_error ("unaligned device size");
# endif
grub_util_info ("the size of %s is %llu", name, disk->total_sectors);
return GRUB_ERR_NONE;
}
fail:
/* In GNU/Hurd, stat() will return the right size. */
#elif !defined (__GNU__)
# warning "No special routine to get the size of a block device is implemented for your OS. This is not possibly fatal."
#endif
if (stat (map[drive].device, &st) < 0)
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "cannot stat `%s'", map[drive].device);
disk->total_sectors = st.st_size >> disk->log_sector_size;
grub_util_info ("the size of %s is %lu", name, disk->total_sectors);
return GRUB_ERR_NONE;
}
int
@ -367,55 +381,6 @@ grub_util_device_is_mapped (const char *dev)
}
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
/* FIXME: geom actually gives us the whole container hierarchy.
It can be used more efficiently than this. */
static void
follow_geom_up (const char *name, grub_disk_addr_t *off_out, char **name_out)
{
struct gmesh mesh;
struct gclass *class;
int error;
struct ggeom *geom;
grub_util_info ("following geom '%s'", name);
error = geom_gettree (&mesh);
if (error != 0)
grub_util_error ("couldn't open geom");
LIST_FOREACH (class, &mesh.lg_class, lg_class)
if (strcasecmp (class->lg_name, "part") == 0)
break;
if (!class)
grub_util_error ("couldn't open geom part");
LIST_FOREACH (geom, &class->lg_geom, lg_geom)
{
struct gprovider *provider;
LIST_FOREACH (provider, &geom->lg_provider, lg_provider)
if (strcmp (provider->lg_name, name) == 0)
{
char *name_tmp = xstrdup (geom->lg_name);
grub_disk_addr_t off = 0;
struct gconfig *config;
grub_util_info ("geom '%s' has parent '%s'", name, geom->lg_name);
follow_geom_up (name_tmp, &off, name_out);
free (name_tmp);
LIST_FOREACH (config, &provider->lg_config, lg_config)
if (strcasecmp (config->lg_name, "start") == 0)
off += strtoull (config->lg_val, 0, 10);
if (off_out)
*off_out = off;
return;
}
}
grub_util_info ("geom '%s' has no parent", name);
if (name_out)
*name_out = xstrdup (name);
if (off_out)
*off_out = 0;
}
static grub_disk_addr_t
find_partition_start (const char *dev)
@ -423,10 +388,11 @@ find_partition_start (const char *dev)
grub_disk_addr_t out;
if (strncmp (dev, "/dev/", sizeof ("/dev/") - 1) != 0)
return 0;
follow_geom_up (dev + sizeof ("/dev/") - 1, &out, NULL);
grub_util_follow_gpart_up (dev + sizeof ("/dev/") - 1, &out, NULL);
return out;
}
#elif defined(__linux__) || defined(__CYGWIN__) || defined(HAVE_DIOCGDINFO)
static grub_disk_addr_t
find_partition_start (const char *dev)
@ -1508,7 +1474,7 @@ devmapper_out:
char *out, *out2;
if (strncmp (os_dev, "/dev/", sizeof ("/dev/") - 1) != 0)
return xstrdup (os_dev);
follow_geom_up (os_dev + sizeof ("/dev/") - 1, NULL, &out);
grub_util_follow_gpart_up (os_dev + sizeof ("/dev/") - 1, NULL, &out);
out2 = xasprintf ("/dev/%s", out);
free (out);
@ -1667,6 +1633,8 @@ grub_util_biosdisk_get_grub_dev (const char *os_dev)
struct stat st;
int drive;
grub_util_info ("Looking for %s", os_dev);
if (stat (os_dev, &st) < 0)
{
grub_error (GRUB_ERR_BAD_DEVICE, "cannot stat `%s'", os_dev);

35
include/grub/cryptodisk.h
View file

@ -21,6 +21,7 @@
#include <grub/disk.h>
#include <grub/crypto.h>
#include <grub/list.h>
typedef enum
{
@ -57,6 +58,8 @@ typedef gcry_err_code_t
struct grub_cryptodisk
{
struct grub_cryptodisk *next;
char *source;
grub_disk_addr_t offset;
grub_disk_addr_t total_length;
@ -78,6 +81,7 @@ struct grub_cryptodisk
grub_size_t iv_prefix_len;
#ifdef GRUB_UTIL
char *cheat;
const char *modname;
int cheat_fd;
#endif
int log_sector_size;
@ -86,10 +90,37 @@ struct grub_cryptodisk
grub_uint8_t rekey_key[64];
grub_uint64_t last_rekey;
int rekey_derived_size;
struct grub_cryptodisk *next;
};
typedef struct grub_cryptodisk *grub_cryptodisk_t;
struct grub_cryptodisk_dev
{
struct grub_cryptodisk_dev *next;
grub_cryptodisk_t (*scan) (grub_disk_t disk, const char *check_uuid,
int boot_only);
grub_err_t (*recover_key) (grub_disk_t disk, grub_cryptodisk_t dev);
};
typedef struct grub_cryptodisk_dev *grub_cryptodisk_dev_t;
extern grub_cryptodisk_dev_t EXPORT_VAR (grub_cryptodisk_list);
#ifndef GRUB_LST_GENERATOR
static inline void
grub_cryptodisk_dev_register (grub_cryptodisk_dev_t cr)
{
grub_list_push (GRUB_AS_LIST_P (&grub_cryptodisk_list), GRUB_AS_LIST (cr));
}
#endif
static inline void
grub_cryptodisk_dev_unregister (grub_cryptodisk_dev_t cr)
{
grub_list_remove (GRUB_AS_LIST_P (&grub_cryptodisk_list), GRUB_AS_LIST (cr));
}
#define FOR_CRYPTODISK_DEVS(var) FOR_LIST_ELEMENTS((var), (grub_cryptodisk_list))
gcry_err_code_t
grub_cryptodisk_setkey (grub_cryptodisk_t dev,
grub_uint8_t *key, grub_size_t keysize);
@ -106,6 +137,8 @@ grub_cryptodisk_cheat_insert (grub_cryptodisk_t newdev, const char *name,
grub_disk_t source, const char *cheat);
void
grub_util_cryptodisk_print_abstraction (grub_disk_t disk);
char *
grub_util_get_geli_uuid (const char *dev);
#endif
grub_cryptodisk_t grub_cryptodisk_get_by_uuid (const char *uuid);

5
include/grub/emu/getroot.h
View file

@ -26,6 +26,7 @@ enum grub_dev_abstraction_types {
GRUB_DEV_ABSTRACTION_LVM,
GRUB_DEV_ABSTRACTION_RAID,
GRUB_DEV_ABSTRACTION_LUKS,
GRUB_DEV_ABSTRACTION_GELI,
};
char *grub_find_device (const char *dir, dev_t dev);
@ -38,5 +39,9 @@ const char *grub_util_check_char_device (const char *blk_dev);
#ifdef __linux__
char **grub_util_raid_getmembers (const char *name, int bootable);
#endif
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
void grub_util_follow_gpart_up (const char *name, grub_disk_addr_t *off_out,
char **name_out);
#endif
#endif /* ! GRUB_UTIL_GETROOT_HEADER */

8
include/grub/emu/hostdisk.h
View file

@ -35,7 +35,11 @@ grub_err_t
grub_util_fd_seek (int fd, const char *name, grub_uint64_t sector);
ssize_t grub_util_fd_read (int fd, char *buf, size_t len);
grub_err_t
grub_luks_cheat_mount (const char *sourcedev, const char *cheat);
void grub_util_luks_print_uuid (grub_disk_t disk);
grub_cryptodisk_cheat_mount (const char *sourcedev, const char *cheat);
void grub_util_cryptodisk_print_uuid (grub_disk_t disk);
#if !defined(__MINGW32__)
grub_uint64_t
grub_util_get_fd_sectors (int fd, unsigned *log_secsize);
#endif
#endif /* ! GRUB_BIOSDISK_MACHINE_UTIL_HEADER */

6
util/grub-fstest.c
View file

@ -309,10 +309,8 @@ fstest (int n, char **args)
char *argv[2] = { "-a", NULL};
if (mount_crypt)
{
if (execute_command ("luksmount", 1, argv))
grub_util_error (_("luksmount command fails: %s"), grub_errmsg);
if (execute_command ("gelimount", 1, argv))
grub_util_error (_("gelimount command fails: %s"), grub_errmsg);
if (execute_command ("cryptomount", 1, argv))
grub_util_error (_("cryptomount command fails: %s"), grub_errmsg);
}
}

6
util/grub-install.in
View file

@ -538,9 +538,9 @@ if [ "x${devabstraction_module}" = "x" ] ; then
exit 1
fi
if [ x$GRUB_LUKS_ENABLE = xy ]; then
for uuid in "`"${grub_probe}" --device "${device}" --target=luks_uuid`"; do
echo "luksmount -u $uuid"
if [ x$GRUB_CRYPTODISK_ENABLE = xy ]; then
for uuid in "`"${grub_probe}" --device "${device}" --target=cryptodisk_uuid`"; do
echo "cryptomount -u $uuid"
done
fi

2
util/grub-mkconfig.in
View file

@ -254,7 +254,7 @@ export GRUB_DEFAULT \
GRUB_DISABLE_OS_PROBER \
GRUB_INIT_TUNE \
GRUB_SAVEDEFAULT \
GRUB_ENABLE_LUKS \
GRUB_ENABLE_CRYPTODISK \
GRUB_BADRAM
if test "x${grub_cfg}" != "x"; then

10
util/grub-mkconfig_lib.in
View file

@ -69,12 +69,12 @@ is_path_readable_by_grub ()
return 1
fi
if [ x$GRUB_LUKS_ENABLE = xy ]; then
if [ x$GRUB_CRYPTODISK_ENABLE = xy ]; then
return 0
fi
for abstraction in $abstractions; do
if [ "x$abstraction" = xluks ]; then
if [ "x$abstraction" = xcryptodisk ]; then
return 1
fi
done
@ -138,9 +138,9 @@ prepare_grub_to_access_device ()
echo "insmod ${module}"
done
if [ x$GRUB_LUKS_ENABLE = xy ]; then
for uuid in "`"${grub_probe}" --device "${device}" --target=luks_uuid`"; do
echo "luksmount -u $uuid"
if [ x$GRUB_CRYPTODISK_ENABLE = xy ]; then
for uuid in "`"${grub_probe}" --device "${device}" --target=cryptodisk_uuid`"; do
echo "cryptomount -u $uuid"
done
fi

21
util/grub-probe.c
View file

@ -56,7 +56,7 @@ enum {
PRINT_DEVICE,
PRINT_PARTMAP,
PRINT_ABSTRACTION,
PRINT_LUKS_UUID
PRINT_CRYPTODISK_UUID
};
int print = PRINT_FS;
@ -91,7 +91,7 @@ probe_partmap (grub_disk_t disk)
}
static void
probe_luks_uuid (grub_disk_t disk)
probe_cryptodisk_uuid (grub_disk_t disk)
{
grub_disk_memberlist_t list = NULL, tmp;
@ -102,14 +102,13 @@ probe_luks_uuid (grub_disk_t disk)
}
while (list)
{
probe_luks_uuid (list->disk);
probe_cryptodisk_uuid (list->disk);
tmp = list->next;
free (list);
list = tmp;
}
/* FIXME: support non-LUKS. */
if (disk->dev->id == GRUB_DISK_DEVICE_CRYPTODISK_ID)
grub_util_luks_print_uuid (disk);
grub_util_cryptodisk_print_uuid (disk);
}
static int
@ -215,9 +214,9 @@ probe (const char *path, char *device_name)
goto end;
}
if (print == PRINT_LUKS_UUID)
if (print == PRINT_CRYPTODISK_UUID)
{
probe_luks_uuid (dev->disk);
probe_cryptodisk_uuid (dev->disk);
printf ("\n");
goto end;
}
@ -295,8 +294,8 @@ Probe device information for a given path (or device, if the -d option is given)
\n\
-d, --device given argument is a system device, not a path\n\
-m, --device-map=FILE use FILE as the device map [default=%s]\n\
-t, --target=(fs|fs_uuid|fs_label|drive|device|partmap|abstraction|luks_uuid)\n\
print filesystem module, GRUB drive, system device, partition map module, abstraction module or LUKS UUID [default=fs]\n\
-t, --target=(fs|fs_uuid|fs_label|drive|device|partmap|abstraction|cryptodisk_uuid)\n\
print filesystem module, GRUB drive, system device, partition map module, abstraction module or CRYPTO UUID [default=fs]\n\
-h, --help display this message and exit\n\
-V, --version print version information and exit\n\
-v, --verbose print verbose messages\n\
@ -354,8 +353,8 @@ main (int argc, char *argv[])
print = PRINT_PARTMAP;
else if (!strcmp (optarg, "abstraction"))
print = PRINT_ABSTRACTION;
else if (!strcmp (optarg, "luks_uuid"))
print = PRINT_LUKS_UUID;
else if (!strcmp (optarg, "cryptodisk_uuid"))
print = PRINT_CRYPTODISK_UUID;
else
usage (1);
break;